./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--hwmon--max16065.ko-main.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3fad8e3-4b55-4650-ac2d-a58e4a5d93e7/bin/utaipan-verify-t7M7D8N6sZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3fad8e3-4b55-4650-ac2d-a58e4a5d93e7/bin/utaipan-verify-t7M7D8N6sZ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3fad8e3-4b55-4650-ac2d-a58e4a5d93e7/bin/utaipan-verify-t7M7D8N6sZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3fad8e3-4b55-4650-ac2d-a58e4a5d93e7/bin/utaipan-verify-t7M7D8N6sZ/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--hwmon--max16065.ko-main.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3fad8e3-4b55-4650-ac2d-a58e4a5d93e7/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3fad8e3-4b55-4650-ac2d-a58e4a5d93e7/bin/utaipan-verify-t7M7D8N6sZ --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 1ad6d1ed8310d8e3264189ac87472d58c77647a0c63d75779b5974e889987542 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 05:23:29,863 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 05:23:29,939 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3fad8e3-4b55-4650-ac2d-a58e4a5d93e7/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-64bit-Taipan_Default.epf [2023-11-19 05:23:29,946 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 05:23:29,947 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 05:23:29,976 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 05:23:29,977 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 05:23:29,978 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 05:23:29,979 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 05:23:29,980 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 05:23:29,981 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-19 05:23:29,981 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-19 05:23:29,982 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-19 05:23:29,983 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-19 05:23:29,984 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-19 05:23:29,985 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-19 05:23:29,985 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-19 05:23:29,986 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-19 05:23:29,987 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-19 05:23:29,988 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-19 05:23:29,988 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-19 05:23:29,989 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-19 05:23:29,990 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 05:23:29,991 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 05:23:29,991 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 05:23:29,992 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 05:23:29,993 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 05:23:29,993 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 05:23:29,994 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 05:23:29,994 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 05:23:29,995 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 05:23:29,996 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 05:23:29,996 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 05:23:29,997 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 05:23:29,998 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 05:23:29,998 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 05:23:29,999 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 05:23:29,999 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-19 05:23:30,000 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 05:23:30,001 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 05:23:30,001 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-19 05:23:30,002 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 05:23:30,003 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_f3fad8e3-4b55-4650-ac2d-a58e4a5d93e7/bin/utaipan-verify-t7M7D8N6sZ/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3fad8e3-4b55-4650-ac2d-a58e4a5d93e7/bin/utaipan-verify-t7M7D8N6sZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1ad6d1ed8310d8e3264189ac87472d58c77647a0c63d75779b5974e889987542 [2023-11-19 05:23:30,314 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 05:23:30,342 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 05:23:30,345 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 05:23:30,347 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 05:23:30,348 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 05:23:30,349 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3fad8e3-4b55-4650-ac2d-a58e4a5d93e7/bin/utaipan-verify-t7M7D8N6sZ/../../sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--hwmon--max16065.ko-main.cil.out.i [2023-11-19 05:23:33,728 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 05:23:34,263 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 05:23:34,265 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3fad8e3-4b55-4650-ac2d-a58e4a5d93e7/sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--hwmon--max16065.ko-main.cil.out.i [2023-11-19 05:23:34,312 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3fad8e3-4b55-4650-ac2d-a58e4a5d93e7/bin/utaipan-verify-t7M7D8N6sZ/data/db59be342/c2fec0bf7b2940729cfd8ad1fe88d1f3/FLAGf47b54e49 [2023-11-19 05:23:34,327 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3fad8e3-4b55-4650-ac2d-a58e4a5d93e7/bin/utaipan-verify-t7M7D8N6sZ/data/db59be342/c2fec0bf7b2940729cfd8ad1fe88d1f3 [2023-11-19 05:23:34,329 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 05:23:34,331 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 05:23:34,332 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 05:23:34,332 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 05:23:34,338 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 05:23:34,339 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:23:34" (1/1) ... [2023-11-19 05:23:34,340 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2d04acfd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:23:34, skipping insertion in model container [2023-11-19 05:23:34,340 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:23:34" (1/1) ... [2023-11-19 05:23:34,499 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 05:23:35,497 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_f3fad8e3-4b55-4650-ac2d-a58e4a5d93e7/sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--hwmon--max16065.ko-main.cil.out.i[168201,168214] [2023-11-19 05:23:35,595 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 05:23:35,726 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 05:23:36,073 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_f3fad8e3-4b55-4650-ac2d-a58e4a5d93e7/sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--hwmon--max16065.ko-main.cil.out.i[168201,168214] [2023-11-19 05:23:36,103 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 05:23:36,431 INFO L206 MainTranslator]: Completed translation [2023-11-19 05:23:36,432 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:23:36 WrapperNode [2023-11-19 05:23:36,432 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 05:23:36,434 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 05:23:36,434 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 05:23:36,434 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 05:23:36,442 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:23:36" (1/1) ... [2023-11-19 05:23:36,546 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:23:36" (1/1) ... [2023-11-19 05:23:36,844 INFO L138 Inliner]: procedures = 115, calls = 2153, calls flagged for inlining = 45, calls inlined = 37, statements flattened = 5491 [2023-11-19 05:23:36,845 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 05:23:36,846 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 05:23:36,846 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 05:23:36,847 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 05:23:36,859 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:23:36" (1/1) ... [2023-11-19 05:23:36,859 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:23:36" (1/1) ... [2023-11-19 05:23:36,920 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:23:36" (1/1) ... [2023-11-19 05:23:36,923 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:23:36" (1/1) ... [2023-11-19 05:23:37,052 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:23:36" (1/1) ... [2023-11-19 05:23:37,084 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:23:36" (1/1) ... [2023-11-19 05:23:37,110 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:23:36" (1/1) ... [2023-11-19 05:23:37,138 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:23:36" (1/1) ... [2023-11-19 05:23:37,177 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 05:23:37,178 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 05:23:37,178 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 05:23:37,178 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 05:23:37,179 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:23:36" (1/1) ... [2023-11-19 05:23:37,187 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 05:23:37,200 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3fad8e3-4b55-4650-ac2d-a58e4a5d93e7/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:23:37,228 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3fad8e3-4b55-4650-ac2d-a58e4a5d93e7/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 05:23:37,266 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3fad8e3-4b55-4650-ac2d-a58e4a5d93e7/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 05:23:37,283 INFO L130 BoogieDeclarations]: Found specification of procedure max16065_set_limit [2023-11-19 05:23:37,283 INFO L138 BoogieDeclarations]: Found implementation of procedure max16065_set_limit [2023-11-19 05:23:37,283 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 05:23:37,283 INFO L130 BoogieDeclarations]: Found specification of procedure sysfs_remove_group [2023-11-19 05:23:37,284 INFO L138 BoogieDeclarations]: Found implementation of procedure sysfs_remove_group [2023-11-19 05:23:37,284 INFO L130 BoogieDeclarations]: Found specification of procedure i2c_get_clientdata [2023-11-19 05:23:37,284 INFO L138 BoogieDeclarations]: Found implementation of procedure i2c_get_clientdata [2023-11-19 05:23:37,284 INFO L130 BoogieDeclarations]: Found specification of procedure max16065_show_limit [2023-11-19 05:23:37,284 INFO L138 BoogieDeclarations]: Found implementation of procedure max16065_show_limit [2023-11-19 05:23:37,286 INFO L130 BoogieDeclarations]: Found specification of procedure max16065_update_device [2023-11-19 05:23:37,287 INFO L138 BoogieDeclarations]: Found implementation of procedure max16065_update_device [2023-11-19 05:23:37,287 INFO L130 BoogieDeclarations]: Found specification of procedure max16065_show_input [2023-11-19 05:23:37,288 INFO L138 BoogieDeclarations]: Found implementation of procedure max16065_show_input [2023-11-19 05:23:37,288 INFO L130 BoogieDeclarations]: Found specification of procedure max16065_read_adc [2023-11-19 05:23:37,288 INFO L138 BoogieDeclarations]: Found implementation of procedure max16065_read_adc [2023-11-19 05:23:37,288 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2023-11-19 05:23:37,288 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2023-11-19 05:23:37,289 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_lock_update_lock_of_max16065_data [2023-11-19 05:23:37,289 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_lock_update_lock_of_max16065_data [2023-11-19 05:23:37,289 INFO L130 BoogieDeclarations]: Found specification of procedure max16065_show_alarm [2023-11-19 05:23:37,290 INFO L138 BoogieDeclarations]: Found implementation of procedure max16065_show_alarm [2023-11-19 05:23:37,290 INFO L130 BoogieDeclarations]: Found specification of procedure LIMIT_TO_MV [2023-11-19 05:23:37,291 INFO L138 BoogieDeclarations]: Found implementation of procedure LIMIT_TO_MV [2023-11-19 05:23:37,292 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 05:23:37,292 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2023-11-19 05:23:37,292 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2023-11-19 05:23:37,293 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2023-11-19 05:23:37,294 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2023-11-19 05:23:37,294 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2023-11-19 05:23:37,295 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2023-11-19 05:23:37,295 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-19 05:23:37,296 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock [2023-11-19 05:23:37,296 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock [2023-11-19 05:23:37,296 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 05:23:37,297 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-19 05:23:37,297 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 05:23:37,298 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_unlock_update_lock_of_max16065_data [2023-11-19 05:23:37,298 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_unlock_update_lock_of_max16065_data [2023-11-19 05:23:37,298 INFO L130 BoogieDeclarations]: Found specification of procedure i2c_smbus_read_byte_data [2023-11-19 05:23:37,299 INFO L138 BoogieDeclarations]: Found implementation of procedure i2c_smbus_read_byte_data [2023-11-19 05:23:37,299 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-19 05:23:37,299 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 05:23:37,299 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-19 05:23:37,300 INFO L130 BoogieDeclarations]: Found specification of procedure max16065_cleanup [2023-11-19 05:23:37,300 INFO L138 BoogieDeclarations]: Found implementation of procedure max16065_cleanup [2023-11-19 05:23:37,300 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 05:23:37,300 INFO L130 BoogieDeclarations]: Found specification of procedure i2c_smbus_write_byte_data [2023-11-19 05:23:37,300 INFO L138 BoogieDeclarations]: Found implementation of procedure i2c_smbus_write_byte_data [2023-11-19 05:23:37,301 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 05:23:37,301 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 05:23:37,301 INFO L130 BoogieDeclarations]: Found specification of procedure sysfs_create_file [2023-11-19 05:23:37,301 INFO L138 BoogieDeclarations]: Found implementation of procedure sysfs_create_file [2023-11-19 05:23:37,302 INFO L130 BoogieDeclarations]: Found specification of procedure IS_ERR [2023-11-19 05:23:37,302 INFO L138 BoogieDeclarations]: Found implementation of procedure IS_ERR [2023-11-19 05:23:38,043 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 05:23:38,048 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 05:23:45,054 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 05:23:48,334 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 05:23:48,335 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-19 05:23:48,351 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:23:48 BoogieIcfgContainer [2023-11-19 05:23:48,351 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 05:23:48,355 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 05:23:48,355 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 05:23:48,358 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 05:23:48,359 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 05:23:34" (1/3) ... [2023-11-19 05:23:48,361 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a2a7c2f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:23:48, skipping insertion in model container [2023-11-19 05:23:48,361 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:23:36" (2/3) ... [2023-11-19 05:23:48,362 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a2a7c2f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:23:48, skipping insertion in model container [2023-11-19 05:23:48,362 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:23:48" (3/3) ... [2023-11-19 05:23:48,363 INFO L112 eAbstractionObserver]: Analyzing ICFG 32_7a_cilled_linux-3.8-rc1-drivers--hwmon--max16065.ko-main.cil.out.i [2023-11-19 05:23:48,385 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 05:23:48,385 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 05:23:48,479 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 05:23:48,487 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;@5aaf75fd, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-19 05:23:48,488 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-19 05:23:48,499 INFO L276 IsEmpty]: Start isEmpty. Operand has 875 states, 670 states have (on average 1.6761194029850746) internal successors, (1123), 677 states have internal predecessors, (1123), 182 states have call successors, (182), 21 states have call predecessors, (182), 21 states have return successors, (182), 182 states have call predecessors, (182), 182 states have call successors, (182) [2023-11-19 05:23:48,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-11-19 05:23:48,528 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:23:48,529 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:23:48,529 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:23:48,536 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:23:48,537 INFO L85 PathProgramCache]: Analyzing trace with hash 2103868155, now seen corresponding path program 1 times [2023-11-19 05:23:48,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:23:48,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054342600] [2023-11-19 05:23:48,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:23:48,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:23:49,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:23:49,686 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:23:49,687 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:23:49,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054342600] [2023-11-19 05:23:49,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054342600] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:23:49,689 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:23:49,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 05:23:49,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211179491] [2023-11-19 05:23:49,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:23:49,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:23:49,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:23:49,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:23:49,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:23:49,745 INFO L87 Difference]: Start difference. First operand has 875 states, 670 states have (on average 1.6761194029850746) internal successors, (1123), 677 states have internal predecessors, (1123), 182 states have call successors, (182), 21 states have call predecessors, (182), 21 states have return successors, (182), 182 states have call predecessors, (182), 182 states have call successors, (182) Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-19 05:23:50,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:23:50,638 INFO L93 Difference]: Finished difference Result 2616 states and 4611 transitions. [2023-11-19 05:23:50,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:23:50,641 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 29 [2023-11-19 05:23:50,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:23:50,673 INFO L225 Difference]: With dead ends: 2616 [2023-11-19 05:23:50,673 INFO L226 Difference]: Without dead ends: 1738 [2023-11-19 05:23:50,685 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 [2023-11-19 05:23:50,689 INFO L413 NwaCegarLoop]: 1354 mSDtfsCounter, 1462 mSDsluCounter, 1350 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1462 SdHoareTripleChecker+Valid, 2704 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-19 05:23:50,690 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1462 Valid, 2704 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-19 05:23:50,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1738 states. [2023-11-19 05:23:50,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1738 to 1725. [2023-11-19 05:23:50,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1725 states, 1327 states have (on average 1.6744536548605877) internal successors, (2222), 1332 states have internal predecessors, (2222), 357 states have call successors, (357), 41 states have call predecessors, (357), 40 states have return successors, (351), 351 states have call predecessors, (351), 351 states have call successors, (351) [2023-11-19 05:23:50,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1725 states to 1725 states and 2930 transitions. [2023-11-19 05:23:50,922 INFO L78 Accepts]: Start accepts. Automaton has 1725 states and 2930 transitions. Word has length 29 [2023-11-19 05:23:50,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:23:50,923 INFO L495 AbstractCegarLoop]: Abstraction has 1725 states and 2930 transitions. [2023-11-19 05:23:50,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-19 05:23:50,924 INFO L276 IsEmpty]: Start isEmpty. Operand 1725 states and 2930 transitions. [2023-11-19 05:23:50,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-11-19 05:23:50,929 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:23:50,930 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:23:50,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 05:23:50,930 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:23:50,931 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:23:50,931 INFO L85 PathProgramCache]: Analyzing trace with hash -204825844, now seen corresponding path program 1 times [2023-11-19 05:23:50,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:23:50,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768979073] [2023-11-19 05:23:50,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:23:50,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:23:51,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:23:51,670 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:23:51,671 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:23:51,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768979073] [2023-11-19 05:23:51,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768979073] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:23:51,672 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:23:51,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 05:23:51,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268619793] [2023-11-19 05:23:51,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:23:51,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:23:51,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:23:51,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:23:51,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:23:51,675 INFO L87 Difference]: Start difference. First operand 1725 states and 2930 transitions. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-19 05:23:54,197 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-11-19 05:23:54,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:23:54,420 INFO L93 Difference]: Finished difference Result 5164 states and 8772 transitions. [2023-11-19 05:23:54,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:23:54,422 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 30 [2023-11-19 05:23:54,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:23:54,453 INFO L225 Difference]: With dead ends: 5164 [2023-11-19 05:23:54,454 INFO L226 Difference]: Without dead ends: 3440 [2023-11-19 05:23:54,463 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 [2023-11-19 05:23:54,464 INFO L413 NwaCegarLoop]: 1360 mSDtfsCounter, 1459 mSDsluCounter, 1349 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1459 SdHoareTripleChecker+Valid, 2709 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 252 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2023-11-19 05:23:54,465 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1459 Valid, 2709 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 252 Invalid, 1 Unknown, 0 Unchecked, 2.6s Time] [2023-11-19 05:23:54,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3440 states. [2023-11-19 05:23:54,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3440 to 3427. [2023-11-19 05:23:54,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3427 states, 2640 states have (on average 1.6742424242424243) internal successors, (4420), 2645 states have internal predecessors, (4420), 706 states have call successors, (706), 81 states have call predecessors, (706), 80 states have return successors, (700), 700 states have call predecessors, (700), 700 states have call successors, (700) [2023-11-19 05:23:54,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3427 states to 3427 states and 5826 transitions. [2023-11-19 05:23:54,696 INFO L78 Accepts]: Start accepts. Automaton has 3427 states and 5826 transitions. Word has length 30 [2023-11-19 05:23:54,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:23:54,697 INFO L495 AbstractCegarLoop]: Abstraction has 3427 states and 5826 transitions. [2023-11-19 05:23:54,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-19 05:23:54,697 INFO L276 IsEmpty]: Start isEmpty. Operand 3427 states and 5826 transitions. [2023-11-19 05:23:54,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-11-19 05:23:54,699 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:23:54,700 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:23:54,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 05:23:54,700 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:23:54,701 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:23:54,701 INFO L85 PathProgramCache]: Analyzing trace with hash 749203542, now seen corresponding path program 1 times [2023-11-19 05:23:54,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:23:54,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475226689] [2023-11-19 05:23:54,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:23:54,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:23:54,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:23:55,120 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:23:55,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475226689] [2023-11-19 05:23:55,121 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-19 05:23:55,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294614562] [2023-11-19 05:23:55,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:23:55,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:23:55,122 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3fad8e3-4b55-4650-ac2d-a58e4a5d93e7/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:23:55,126 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3fad8e3-4b55-4650-ac2d-a58e4a5d93e7/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:23:55,149 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3fad8e3-4b55-4650-ac2d-a58e4a5d93e7/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 05:23:57,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:23:57,076 INFO L262 TraceCheckSpWp]: Trace formula consists of 6746 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 05:23:57,093 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:23:57,137 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:23:57,137 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:23:57,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [294614562] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:23:57,137 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:23:57,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 05:23:57,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697090757] [2023-11-19 05:23:57,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:23:57,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:23:57,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:23:57,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:23:57,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:23:57,141 INFO L87 Difference]: Start difference. First operand 3427 states and 5826 transitions. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 2 states have internal predecessors, (25), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-19 05:23:57,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:23:57,978 INFO L93 Difference]: Finished difference Result 10262 states and 17450 transitions. [2023-11-19 05:23:57,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:23:57,979 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 2 states have internal predecessors, (25), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 34 [2023-11-19 05:23:57,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:23:58,037 INFO L225 Difference]: With dead ends: 10262 [2023-11-19 05:23:58,037 INFO L226 Difference]: Without dead ends: 6836 [2023-11-19 05:23:58,054 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:23:58,057 INFO L413 NwaCegarLoop]: 1364 mSDtfsCounter, 1456 mSDsluCounter, 1346 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1456 SdHoareTripleChecker+Valid, 2710 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-19 05:23:58,058 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1456 Valid, 2710 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-19 05:23:58,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6836 states. [2023-11-19 05:23:58,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6836 to 6823. [2023-11-19 05:23:58,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6823 states, 5264 states have (on average 1.6740121580547112) internal successors, (8812), 5269 states have internal predecessors, (8812), 1398 states have call successors, (1398), 161 states have call predecessors, (1398), 160 states have return successors, (1392), 1392 states have call predecessors, (1392), 1392 states have call successors, (1392) [2023-11-19 05:23:58,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6823 states to 6823 states and 11602 transitions. [2023-11-19 05:23:58,498 INFO L78 Accepts]: Start accepts. Automaton has 6823 states and 11602 transitions. Word has length 34 [2023-11-19 05:23:58,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:23:58,499 INFO L495 AbstractCegarLoop]: Abstraction has 6823 states and 11602 transitions. [2023-11-19 05:23:58,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 2 states have internal predecessors, (25), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-19 05:23:58,499 INFO L276 IsEmpty]: Start isEmpty. Operand 6823 states and 11602 transitions. [2023-11-19 05:23:58,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-11-19 05:23:58,501 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:23:58,501 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:23:58,538 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3fad8e3-4b55-4650-ac2d-a58e4a5d93e7/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 05:23:58,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3fad8e3-4b55-4650-ac2d-a58e4a5d93e7/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:23:58,723 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:23:58,723 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:23:58,723 INFO L85 PathProgramCache]: Analyzing trace with hash -2016913547, now seen corresponding path program 1 times [2023-11-19 05:23:58,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:23:58,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875117214] [2023-11-19 05:23:58,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:23:58,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:23:58,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:23:59,138 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:23:59,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875117214] [2023-11-19 05:23:59,138 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-19 05:23:59,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529968851] [2023-11-19 05:23:59,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:23:59,139 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:23:59,139 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3fad8e3-4b55-4650-ac2d-a58e4a5d93e7/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:23:59,141 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3fad8e3-4b55-4650-ac2d-a58e4a5d93e7/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:23:59,168 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3fad8e3-4b55-4650-ac2d-a58e4a5d93e7/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 05:24:00,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:24:00,868 INFO L262 TraceCheckSpWp]: Trace formula consists of 6738 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 05:24:00,882 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:24:00,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:24:00,903 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:24:00,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1529968851] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:24:00,904 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:24:00,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 05:24:00,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915552407] [2023-11-19 05:24:00,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:24:00,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:24:00,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:24:00,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:24:00,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:24:00,907 INFO L87 Difference]: Start difference. First operand 6823 states and 11602 transitions. Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 2 states have internal predecessors, (21), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-19 05:24:02,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:24:02,415 INFO L93 Difference]: Finished difference Result 20434 states and 34754 transitions. [2023-11-19 05:24:02,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:24:02,416 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 2 states have internal predecessors, (21), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 30 [2023-11-19 05:24:02,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:24:02,543 INFO L225 Difference]: With dead ends: 20434 [2023-11-19 05:24:02,543 INFO L226 Difference]: Without dead ends: 13612 [2023-11-19 05:24:02,591 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:24:02,592 INFO L413 NwaCegarLoop]: 1372 mSDtfsCounter, 1460 mSDsluCounter, 1346 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1460 SdHoareTripleChecker+Valid, 2718 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-19 05:24:02,592 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1460 Valid, 2718 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-19 05:24:02,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13612 states. [2023-11-19 05:24:03,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13612 to 13599. [2023-11-19 05:24:03,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13599 states, 10504 states have (on average 1.6736481340441736) internal successors, (17580), 10509 states have internal predecessors, (17580), 2774 states have call successors, (2774), 321 states have call predecessors, (2774), 320 states have return successors, (2768), 2768 states have call predecessors, (2768), 2768 states have call successors, (2768) [2023-11-19 05:24:03,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13599 states to 13599 states and 23122 transitions. [2023-11-19 05:24:03,687 INFO L78 Accepts]: Start accepts. Automaton has 13599 states and 23122 transitions. Word has length 30 [2023-11-19 05:24:03,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:24:03,688 INFO L495 AbstractCegarLoop]: Abstraction has 13599 states and 23122 transitions. [2023-11-19 05:24:03,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 2 states have internal predecessors, (21), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-19 05:24:03,689 INFO L276 IsEmpty]: Start isEmpty. Operand 13599 states and 23122 transitions. [2023-11-19 05:24:03,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-11-19 05:24:03,690 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:24:03,691 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:24:03,729 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3fad8e3-4b55-4650-ac2d-a58e4a5d93e7/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 05:24:03,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3fad8e3-4b55-4650-ac2d-a58e4a5d93e7/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:24:03,920 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:24:03,920 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:24:03,920 INFO L85 PathProgramCache]: Analyzing trace with hash -1269446677, now seen corresponding path program 1 times [2023-11-19 05:24:03,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:24:03,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391619738] [2023-11-19 05:24:03,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:24:03,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:24:04,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:24:04,251 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:24:04,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391619738] [2023-11-19 05:24:04,252 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-19 05:24:04,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423930100] [2023-11-19 05:24:04,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:24:04,252 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:24:04,253 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3fad8e3-4b55-4650-ac2d-a58e4a5d93e7/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:24:04,254 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3fad8e3-4b55-4650-ac2d-a58e4a5d93e7/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:24:04,274 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3fad8e3-4b55-4650-ac2d-a58e4a5d93e7/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 05:24:05,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:24:05,868 INFO L262 TraceCheckSpWp]: Trace formula consists of 6740 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 05:24:05,881 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:24:05,904 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:24:05,904 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:24:05,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [423930100] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:24:05,905 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:24:05,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 05:24:05,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197908833] [2023-11-19 05:24:05,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:24:05,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:24:05,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:24:05,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:24:05,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:24:05,907 INFO L87 Difference]: Start difference. First operand 13599 states and 23122 transitions. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 2 states have internal predecessors, (22), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-19 05:24:08,839 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-11-19 05:24:10,861 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-11-19 05:24:11,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:24:11,396 INFO L93 Difference]: Finished difference Result 40730 states and 69266 transitions. [2023-11-19 05:24:11,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:24:11,397 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 2 states have internal predecessors, (22), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 31 [2023-11-19 05:24:11,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:24:11,570 INFO L225 Difference]: With dead ends: 40730 [2023-11-19 05:24:11,571 INFO L226 Difference]: Without dead ends: 27132 [2023-11-19 05:24:11,647 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:24:11,650 INFO L413 NwaCegarLoop]: 1380 mSDtfsCounter, 1459 mSDsluCounter, 1346 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 2 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1459 SdHoareTripleChecker+Valid, 2726 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2023-11-19 05:24:11,650 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1459 Valid, 2726 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 259 Invalid, 2 Unknown, 0 Unchecked, 4.5s Time] [2023-11-19 05:24:11,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27132 states. [2023-11-19 05:24:13,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27132 to 27119. [2023-11-19 05:24:13,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27119 states, 20968 states have (on average 1.6732163296451736) internal successors, (35084), 20973 states have internal predecessors, (35084), 5510 states have call successors, (5510), 641 states have call predecessors, (5510), 640 states have return successors, (5504), 5504 states have call predecessors, (5504), 5504 states have call successors, (5504) [2023-11-19 05:24:13,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27119 states to 27119 states and 46098 transitions. [2023-11-19 05:24:13,754 INFO L78 Accepts]: Start accepts. Automaton has 27119 states and 46098 transitions. Word has length 31 [2023-11-19 05:24:13,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:24:13,754 INFO L495 AbstractCegarLoop]: Abstraction has 27119 states and 46098 transitions. [2023-11-19 05:24:13,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 2 states have internal predecessors, (22), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-19 05:24:13,756 INFO L276 IsEmpty]: Start isEmpty. Operand 27119 states and 46098 transitions. [2023-11-19 05:24:13,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-11-19 05:24:13,757 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:24:13,758 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:24:13,794 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3fad8e3-4b55-4650-ac2d-a58e4a5d93e7/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 05:24:13,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3fad8e3-4b55-4650-ac2d-a58e4a5d93e7/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:24:13,971 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:24:13,971 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:24:13,971 INFO L85 PathProgramCache]: Analyzing trace with hash 1697605670, now seen corresponding path program 1 times [2023-11-19 05:24:13,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:24:13,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303079051] [2023-11-19 05:24:13,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:24:13,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:24:14,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:24:14,299 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:24:14,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303079051] [2023-11-19 05:24:14,299 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-19 05:24:14,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434226437] [2023-11-19 05:24:14,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:24:14,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:24:14,300 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3fad8e3-4b55-4650-ac2d-a58e4a5d93e7/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:24:14,301 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3fad8e3-4b55-4650-ac2d-a58e4a5d93e7/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:24:14,313 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3fad8e3-4b55-4650-ac2d-a58e4a5d93e7/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process