./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 527bcce2 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_a34bd191-97ce-4748-845d-c207300a2f78/bin/utaipan-verify-QoSU8krkJ5/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a34bd191-97ce-4748-845d-c207300a2f78/bin/utaipan-verify-QoSU8krkJ5/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a34bd191-97ce-4748-845d-c207300a2f78/bin/utaipan-verify-QoSU8krkJ5/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a34bd191-97ce-4748-845d-c207300a2f78/bin/utaipan-verify-QoSU8krkJ5/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_a34bd191-97ce-4748-845d-c207300a2f78/bin/utaipan-verify-QoSU8krkJ5/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a34bd191-97ce-4748-845d-c207300a2f78/bin/utaipan-verify-QoSU8krkJ5 --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-527bcce [2023-11-21 19:56:50,762 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-21 19:56:50,882 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a34bd191-97ce-4748-845d-c207300a2f78/bin/utaipan-verify-QoSU8krkJ5/config/svcomp-Reach-64bit-Taipan_Default.epf [2023-11-21 19:56:50,895 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-21 19:56:50,896 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-21 19:56:50,934 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-21 19:56:50,935 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-21 19:56:50,936 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-21 19:56:50,937 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-21 19:56:50,943 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-21 19:56:50,943 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-21 19:56:50,944 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-21 19:56:50,944 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-21 19:56:50,946 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-21 19:56:50,947 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-21 19:56:50,947 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-21 19:56:50,948 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-21 19:56:50,948 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-21 19:56:50,949 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-21 19:56:50,950 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-21 19:56:50,950 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-21 19:56:50,951 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-21 19:56:50,952 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-21 19:56:50,953 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-21 19:56:50,953 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-21 19:56:50,954 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-21 19:56:50,954 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-21 19:56:50,955 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-21 19:56:50,955 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-21 19:56:50,956 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-21 19:56:50,957 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-21 19:56:50,958 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-21 19:56:50,958 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-21 19:56:50,958 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-21 19:56:50,959 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 19:56:50,959 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-21 19:56:50,960 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-21 19:56:50,960 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-21 19:56:50,960 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-21 19:56:50,961 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-21 19:56:50,961 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-21 19:56:50,961 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-21 19:56:50,962 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-21 19:56:50,962 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-21 19:56:50,963 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_a34bd191-97ce-4748-845d-c207300a2f78/bin/utaipan-verify-QoSU8krkJ5/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a34bd191-97ce-4748-845d-c207300a2f78/bin/utaipan-verify-QoSU8krkJ5 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1ad6d1ed8310d8e3264189ac87472d58c77647a0c63d75779b5974e889987542 [2023-11-21 19:56:51,273 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-21 19:56:51,305 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-21 19:56:51,308 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-21 19:56:51,309 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-21 19:56:51,310 INFO L274 PluginConnector]: CDTParser initialized [2023-11-21 19:56:51,311 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a34bd191-97ce-4748-845d-c207300a2f78/bin/utaipan-verify-QoSU8krkJ5/../../sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--hwmon--max16065.ko-main.cil.out.i [2023-11-21 19:56:54,408 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-21 19:56:55,008 INFO L384 CDTParser]: Found 1 translation units. [2023-11-21 19:56:55,009 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a34bd191-97ce-4748-845d-c207300a2f78/sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--hwmon--max16065.ko-main.cil.out.i [2023-11-21 19:56:55,055 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a34bd191-97ce-4748-845d-c207300a2f78/bin/utaipan-verify-QoSU8krkJ5/data/0f3722842/10c147c2ce5a42cbac59508257208d7b/FLAGccad1d09b [2023-11-21 19:56:55,074 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a34bd191-97ce-4748-845d-c207300a2f78/bin/utaipan-verify-QoSU8krkJ5/data/0f3722842/10c147c2ce5a42cbac59508257208d7b [2023-11-21 19:56:55,080 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-21 19:56:55,081 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-21 19:56:55,083 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-21 19:56:55,083 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-21 19:56:55,091 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-21 19:56:55,091 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 07:56:55" (1/1) ... [2023-11-21 19:56:55,093 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@672d0792 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:56:55, skipping insertion in model container [2023-11-21 19:56:55,093 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 07:56:55" (1/1) ... [2023-11-21 19:56:55,229 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-21 19:56:56,394 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_a34bd191-97ce-4748-845d-c207300a2f78/sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--hwmon--max16065.ko-main.cil.out.i[168201,168214] [2023-11-21 19:56:56,492 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 19:56:56,614 INFO L202 MainTranslator]: Completed pre-run [2023-11-21 19:56:56,945 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_a34bd191-97ce-4748-845d-c207300a2f78/sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--hwmon--max16065.ko-main.cil.out.i[168201,168214] [2023-11-21 19:56:56,974 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 19:56:57,311 INFO L206 MainTranslator]: Completed translation [2023-11-21 19:56:57,312 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:56:57 WrapperNode [2023-11-21 19:56:57,312 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-21 19:56:57,314 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-21 19:56:57,314 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-21 19:56:57,314 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-21 19:56:57,322 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:56:57" (1/1) ... [2023-11-21 19:56:57,461 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:56:57" (1/1) ... [2023-11-21 19:56:57,689 INFO L138 Inliner]: procedures = 115, calls = 2153, calls flagged for inlining = 45, calls inlined = 37, statements flattened = 5491 [2023-11-21 19:56:57,690 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-21 19:56:57,691 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-21 19:56:57,691 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-21 19:56:57,691 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-21 19:56:57,701 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:56:57" (1/1) ... [2023-11-21 19:56:57,701 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:56:57" (1/1) ... [2023-11-21 19:56:57,753 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:56:57" (1/1) ... [2023-11-21 19:56:57,765 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:56:57" (1/1) ... [2023-11-21 19:56:57,874 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:56:57" (1/1) ... [2023-11-21 19:56:57,910 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:56:57" (1/1) ... [2023-11-21 19:56:57,934 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:56:57" (1/1) ... [2023-11-21 19:56:57,955 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:56:57" (1/1) ... [2023-11-21 19:56:57,984 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-21 19:56:57,986 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-21 19:56:57,986 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-21 19:56:57,987 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-21 19:56:57,988 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:56:57" (1/1) ... [2023-11-21 19:56:57,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 19:56:58,006 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a34bd191-97ce-4748-845d-c207300a2f78/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 19:56:58,018 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a34bd191-97ce-4748-845d-c207300a2f78/bin/utaipan-verify-QoSU8krkJ5/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-21 19:56:58,038 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a34bd191-97ce-4748-845d-c207300a2f78/bin/utaipan-verify-QoSU8krkJ5/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-21 19:56:58,057 INFO L130 BoogieDeclarations]: Found specification of procedure max16065_set_limit [2023-11-21 19:56:58,058 INFO L138 BoogieDeclarations]: Found implementation of procedure max16065_set_limit [2023-11-21 19:56:58,058 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-21 19:56:58,058 INFO L130 BoogieDeclarations]: Found specification of procedure sysfs_remove_group [2023-11-21 19:56:58,058 INFO L138 BoogieDeclarations]: Found implementation of procedure sysfs_remove_group [2023-11-21 19:56:58,058 INFO L130 BoogieDeclarations]: Found specification of procedure i2c_get_clientdata [2023-11-21 19:56:58,059 INFO L138 BoogieDeclarations]: Found implementation of procedure i2c_get_clientdata [2023-11-21 19:56:58,059 INFO L130 BoogieDeclarations]: Found specification of procedure max16065_show_limit [2023-11-21 19:56:58,059 INFO L138 BoogieDeclarations]: Found implementation of procedure max16065_show_limit [2023-11-21 19:56:58,059 INFO L130 BoogieDeclarations]: Found specification of procedure max16065_update_device [2023-11-21 19:56:58,059 INFO L138 BoogieDeclarations]: Found implementation of procedure max16065_update_device [2023-11-21 19:56:58,059 INFO L130 BoogieDeclarations]: Found specification of procedure max16065_show_input [2023-11-21 19:56:58,060 INFO L138 BoogieDeclarations]: Found implementation of procedure max16065_show_input [2023-11-21 19:56:58,060 INFO L130 BoogieDeclarations]: Found specification of procedure max16065_read_adc [2023-11-21 19:56:58,060 INFO L138 BoogieDeclarations]: Found implementation of procedure max16065_read_adc [2023-11-21 19:56:58,060 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2023-11-21 19:56:58,060 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2023-11-21 19:56:58,061 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_lock_update_lock_of_max16065_data [2023-11-21 19:56:58,061 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_lock_update_lock_of_max16065_data [2023-11-21 19:56:58,061 INFO L130 BoogieDeclarations]: Found specification of procedure max16065_show_alarm [2023-11-21 19:56:58,061 INFO L138 BoogieDeclarations]: Found implementation of procedure max16065_show_alarm [2023-11-21 19:56:58,061 INFO L130 BoogieDeclarations]: Found specification of procedure LIMIT_TO_MV [2023-11-21 19:56:58,061 INFO L138 BoogieDeclarations]: Found implementation of procedure LIMIT_TO_MV [2023-11-21 19:56:58,062 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-21 19:56:58,062 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2023-11-21 19:56:58,062 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2023-11-21 19:56:58,062 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2023-11-21 19:56:58,062 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2023-11-21 19:56:58,063 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2023-11-21 19:56:58,063 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2023-11-21 19:56:58,063 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-21 19:56:58,063 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock [2023-11-21 19:56:58,063 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock [2023-11-21 19:56:58,063 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-21 19:56:58,064 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-21 19:56:58,064 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-21 19:56:58,064 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_unlock_update_lock_of_max16065_data [2023-11-21 19:56:58,065 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_unlock_update_lock_of_max16065_data [2023-11-21 19:56:58,065 INFO L130 BoogieDeclarations]: Found specification of procedure i2c_smbus_read_byte_data [2023-11-21 19:56:58,065 INFO L138 BoogieDeclarations]: Found implementation of procedure i2c_smbus_read_byte_data [2023-11-21 19:56:58,065 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-21 19:56:58,065 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-21 19:56:58,065 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-21 19:56:58,065 INFO L130 BoogieDeclarations]: Found specification of procedure max16065_cleanup [2023-11-21 19:56:58,065 INFO L138 BoogieDeclarations]: Found implementation of procedure max16065_cleanup [2023-11-21 19:56:58,066 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-21 19:56:58,066 INFO L130 BoogieDeclarations]: Found specification of procedure i2c_smbus_write_byte_data [2023-11-21 19:56:58,066 INFO L138 BoogieDeclarations]: Found implementation of procedure i2c_smbus_write_byte_data [2023-11-21 19:56:58,066 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-21 19:56:58,066 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-21 19:56:58,066 INFO L130 BoogieDeclarations]: Found specification of procedure sysfs_create_file [2023-11-21 19:56:58,066 INFO L138 BoogieDeclarations]: Found implementation of procedure sysfs_create_file [2023-11-21 19:56:58,066 INFO L130 BoogieDeclarations]: Found specification of procedure IS_ERR [2023-11-21 19:56:58,067 INFO L138 BoogieDeclarations]: Found implementation of procedure IS_ERR [2023-11-21 19:56:58,719 INFO L240 CfgBuilder]: Building ICFG [2023-11-21 19:56:58,723 INFO L266 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-21 19:57:05,221 INFO L281 CfgBuilder]: Performing block encoding [2023-11-21 19:57:08,637 INFO L303 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-21 19:57:08,637 INFO L308 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-21 19:57:08,640 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 07:57:08 BoogieIcfgContainer [2023-11-21 19:57:08,640 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-21 19:57:08,644 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-21 19:57:08,644 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-21 19:57:08,647 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-21 19:57:08,648 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 07:56:55" (1/3) ... [2023-11-21 19:57:08,650 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@202e9fff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 07:57:08, skipping insertion in model container [2023-11-21 19:57:08,651 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:56:57" (2/3) ... [2023-11-21 19:57:08,651 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@202e9fff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 07:57:08, skipping insertion in model container [2023-11-21 19:57:08,652 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 07:57:08" (3/3) ... [2023-11-21 19:57:08,653 INFO L112 eAbstractionObserver]: Analyzing ICFG 32_7a_cilled_linux-3.8-rc1-drivers--hwmon--max16065.ko-main.cil.out.i [2023-11-21 19:57:08,676 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-21 19:57:08,677 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-21 19:57:08,776 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-21 19:57:08,785 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;@581667e0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-21 19:57:08,785 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-21 19:57:08,797 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) [2023-11-21 19:57:08,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-11-21 19:57:08,829 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:57:08,830 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] [2023-11-21 19:57:08,831 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:57:08,839 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:57:08,840 INFO L85 PathProgramCache]: Analyzing trace with hash -1661535601, now seen corresponding path program 1 times [2023-11-21 19:57:08,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:57:08,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299389716] [2023-11-21 19:57:08,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:57:08,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:57:09,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:57:10,045 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:57:10,046 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:57:10,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299389716] [2023-11-21 19:57:10,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299389716] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:57:10,047 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:57:10,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 19:57:10,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189300017] [2023-11-21 19:57:10,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:57:10,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 19:57:10,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:57:10,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 19:57:10,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 19:57:10,092 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) [2023-11-21 19:57:10,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:57:10,949 INFO L93 Difference]: Finished difference Result 2616 states and 4611 transitions. [2023-11-21 19:57:10,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 19:57:10,954 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 [2023-11-21 19:57:10,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:57:10,993 INFO L225 Difference]: With dead ends: 2616 [2023-11-21 19:57:10,993 INFO L226 Difference]: Without dead ends: 1738 [2023-11-21 19:57:11,007 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 [2023-11-21 19:57:11,012 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 [2023-11-21 19:57:11,014 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] [2023-11-21 19:57:11,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1738 states. [2023-11-21 19:57:11,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1738 to 1725. [2023-11-21 19:57:11,215 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) [2023-11-21 19:57:11,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1725 states to 1725 states and 2930 transitions. [2023-11-21 19:57:11,231 INFO L78 Accepts]: Start accepts. Automaton has 1725 states and 2930 transitions. Word has length 29 [2023-11-21 19:57:11,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:57:11,232 INFO L495 AbstractCegarLoop]: Abstraction has 1725 states and 2930 transitions. [2023-11-21 19:57:11,232 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) [2023-11-21 19:57:11,232 INFO L276 IsEmpty]: Start isEmpty. Operand 1725 states and 2930 transitions. [2023-11-21 19:57:11,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-11-21 19:57:11,238 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:57:11,238 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] [2023-11-21 19:57:11,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-21 19:57:11,238 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:57:11,239 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:57:11,239 INFO L85 PathProgramCache]: Analyzing trace with hash 937499324, now seen corresponding path program 1 times [2023-11-21 19:57:11,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:57:11,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118309207] [2023-11-21 19:57:11,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:57:11,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:57:11,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:57:11,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:57:11,894 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:57:11,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118309207] [2023-11-21 19:57:11,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118309207] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:57:11,895 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:57:11,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 19:57:11,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160985839] [2023-11-21 19:57:11,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:57:11,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 19:57:11,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:57:11,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 19:57:11,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 19:57:11,905 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) [2023-11-21 19:57:12,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:57:12,598 INFO L93 Difference]: Finished difference Result 5164 states and 8772 transitions. [2023-11-21 19:57:12,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 19:57:12,599 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 [2023-11-21 19:57:12,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:57:12,631 INFO L225 Difference]: With dead ends: 5164 [2023-11-21 19:57:12,631 INFO L226 Difference]: Without dead ends: 3440 [2023-11-21 19:57:12,641 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 [2023-11-21 19:57:12,643 INFO L413 NwaCegarLoop]: 1360 mSDtfsCounter, 1459 mSDsluCounter, 1349 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1459 SdHoareTripleChecker+Valid, 2709 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-21 19:57:12,644 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1459 Valid, 2709 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-21 19:57:12,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3440 states. [2023-11-21 19:57:12,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3440 to 3427. [2023-11-21 19:57:12,956 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) [2023-11-21 19:57:12,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3427 states to 3427 states and 5826 transitions. [2023-11-21 19:57:12,994 INFO L78 Accepts]: Start accepts. Automaton has 3427 states and 5826 transitions. Word has length 30 [2023-11-21 19:57:12,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:57:12,995 INFO L495 AbstractCegarLoop]: Abstraction has 3427 states and 5826 transitions. [2023-11-21 19:57:12,995 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) [2023-11-21 19:57:12,995 INFO L276 IsEmpty]: Start isEmpty. Operand 3427 states and 5826 transitions. [2023-11-21 19:57:12,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-11-21 19:57:12,999 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:57:12,999 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] [2023-11-21 19:57:13,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-21 19:57:13,000 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:57:13,001 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:57:13,006 INFO L85 PathProgramCache]: Analyzing trace with hash 252774951, now seen corresponding path program 1 times [2023-11-21 19:57:13,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:57:13,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475452294] [2023-11-21 19:57:13,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:57:13,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:57:13,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:57:13,339 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:57:13,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475452294] [2023-11-21 19:57:13,340 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-21 19:57:13,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210388299] [2023-11-21 19:57:13,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:57:13,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:57:13,341 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a34bd191-97ce-4748-845d-c207300a2f78/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 19:57:13,343 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a34bd191-97ce-4748-845d-c207300a2f78/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 19:57:13,354 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a34bd191-97ce-4748-845d-c207300a2f78/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-21 19:57:14,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:57:15,030 INFO L262 TraceCheckSpWp]: Trace formula consists of 6746 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-21 19:57:15,046 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 19:57:15,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:57:15,083 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 19:57:15,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [210388299] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:57:15,083 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:57:15,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-21 19:57:15,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741833614] [2023-11-21 19:57:15,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:57:15,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 19:57:15,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:57:15,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 19:57:15,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 19:57:15,085 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) [2023-11-21 19:57:15,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:57:15,983 INFO L93 Difference]: Finished difference Result 10262 states and 17450 transitions. [2023-11-21 19:57:15,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 19:57:15,983 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 [2023-11-21 19:57:15,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:57:16,048 INFO L225 Difference]: With dead ends: 10262 [2023-11-21 19:57:16,049 INFO L226 Difference]: Without dead ends: 6836 [2023-11-21 19:57:16,069 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 [2023-11-21 19:57:16,072 INFO L413 NwaCegarLoop]: 1364 mSDtfsCounter, 1456 mSDsluCounter, 1346 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s 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, 0.5s IncrementalHoareTripleChecker+Time [2023-11-21 19:57:16,073 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1456 Valid, 2710 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-21 19:57:16,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6836 states. [2023-11-21 19:57:16,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6836 to 6823. [2023-11-21 19:57:16,576 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) [2023-11-21 19:57:16,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6823 states to 6823 states and 11602 transitions. [2023-11-21 19:57:16,629 INFO L78 Accepts]: Start accepts. Automaton has 6823 states and 11602 transitions. Word has length 34 [2023-11-21 19:57:16,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:57:16,630 INFO L495 AbstractCegarLoop]: Abstraction has 6823 states and 11602 transitions. [2023-11-21 19:57:16,630 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) [2023-11-21 19:57:16,631 INFO L276 IsEmpty]: Start isEmpty. Operand 6823 states and 11602 transitions. [2023-11-21 19:57:16,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-11-21 19:57:16,633 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:57:16,634 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] [2023-11-21 19:57:16,673 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a34bd191-97ce-4748-845d-c207300a2f78/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-21 19:57:16,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a34bd191-97ce-4748-845d-c207300a2f78/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:57:16,849 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:57:16,849 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:57:16,849 INFO L85 PathProgramCache]: Analyzing trace with hash 706328646, now seen corresponding path program 1 times [2023-11-21 19:57:16,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:57:16,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613460369] [2023-11-21 19:57:16,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:57:16,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:57:17,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:57:17,197 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:57:17,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613460369] [2023-11-21 19:57:17,197 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-21 19:57:17,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664881847] [2023-11-21 19:57:17,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:57:17,198 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:57:17,198 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a34bd191-97ce-4748-845d-c207300a2f78/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 19:57:17,199 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a34bd191-97ce-4748-845d-c207300a2f78/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 19:57:17,225 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a34bd191-97ce-4748-845d-c207300a2f78/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-21 19:57:18,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:57:18,947 INFO L262 TraceCheckSpWp]: Trace formula consists of 6738 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-21 19:57:18,958 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 19:57:18,975 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:57:18,976 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 19:57:18,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [664881847] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:57:18,976 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:57:18,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-21 19:57:18,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907502663] [2023-11-21 19:57:18,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:57:18,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 19:57:18,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:57:18,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 19:57:18,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 19:57:18,979 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) [2023-11-21 19:57:19,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:57:19,952 INFO L93 Difference]: Finished difference Result 20434 states and 34754 transitions. [2023-11-21 19:57:19,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 19:57:19,953 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 [2023-11-21 19:57:19,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:57:20,067 INFO L225 Difference]: With dead ends: 20434 [2023-11-21 19:57:20,067 INFO L226 Difference]: Without dead ends: 13612 [2023-11-21 19:57:20,106 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 [2023-11-21 19:57:20,107 INFO L413 NwaCegarLoop]: 1372 mSDtfsCounter, 1460 mSDsluCounter, 1346 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s 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, 0.5s IncrementalHoareTripleChecker+Time [2023-11-21 19:57:20,108 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1460 Valid, 2718 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-21 19:57:20,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13612 states. [2023-11-21 19:57:20,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13612 to 13599. [2023-11-21 19:57:20,943 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) [2023-11-21 19:57:21,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13599 states to 13599 states and 23122 transitions. [2023-11-21 19:57:21,026 INFO L78 Accepts]: Start accepts. Automaton has 13599 states and 23122 transitions. Word has length 30 [2023-11-21 19:57:21,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:57:21,026 INFO L495 AbstractCegarLoop]: Abstraction has 13599 states and 23122 transitions. [2023-11-21 19:57:21,027 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) [2023-11-21 19:57:21,027 INFO L276 IsEmpty]: Start isEmpty. Operand 13599 states and 23122 transitions. [2023-11-21 19:57:21,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-11-21 19:57:21,031 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:57:21,033 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] [2023-11-21 19:57:21,068 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a34bd191-97ce-4748-845d-c207300a2f78/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-21 19:57:21,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a34bd191-97ce-4748-845d-c207300a2f78/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:57:21,249 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:57:21,249 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:57:21,249 INFO L85 PathProgramCache]: Analyzing trace with hash -1025430496, now seen corresponding path program 1 times [2023-11-21 19:57:21,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:57:21,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700440448] [2023-11-21 19:57:21,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:57:21,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:57:21,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:57:21,620 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:57:21,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700440448] [2023-11-21 19:57:21,621 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-21 19:57:21,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599088398] [2023-11-21 19:57:21,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:57:21,622 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:57:21,622 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a34bd191-97ce-4748-845d-c207300a2f78/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 19:57:21,625 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a34bd191-97ce-4748-845d-c207300a2f78/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 19:57:21,644 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a34bd191-97ce-4748-845d-c207300a2f78/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-21 19:57:23,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:57:23,285 INFO L262 TraceCheckSpWp]: Trace formula consists of 6740 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-21 19:57:23,300 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 19:57:23,325 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:57:23,325 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 19:57:23,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1599088398] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:57:23,326 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:57:23,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-21 19:57:23,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843776609] [2023-11-21 19:57:23,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:57:23,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 19:57:23,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:57:23,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 19:57:23,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 19:57:23,328 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) [2023-11-21 19:57:25,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:57:25,323 INFO L93 Difference]: Finished difference Result 40730 states and 69266 transitions. [2023-11-21 19:57:25,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 19:57:25,324 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 [2023-11-21 19:57:25,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:57:25,454 INFO L225 Difference]: With dead ends: 40730 [2023-11-21 19:57:25,454 INFO L226 Difference]: Without dead ends: 27132 [2023-11-21 19:57:25,510 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 [2023-11-21 19:57:25,513 INFO L413 NwaCegarLoop]: 1380 mSDtfsCounter, 1459 mSDsluCounter, 1346 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1459 SdHoareTripleChecker+Valid, 2726 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-21 19:57:25,514 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1459 Valid, 2726 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-21 19:57:25,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27132 states. [2023-11-21 19:57:27,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27132 to 27119. [2023-11-21 19:57:27,281 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) [2023-11-21 19:57:27,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27119 states to 27119 states and 46098 transitions. [2023-11-21 19:57:27,467 INFO L78 Accepts]: Start accepts. Automaton has 27119 states and 46098 transitions. Word has length 31 [2023-11-21 19:57:27,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:57:27,468 INFO L495 AbstractCegarLoop]: Abstraction has 27119 states and 46098 transitions. [2023-11-21 19:57:27,468 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) [2023-11-21 19:57:27,468 INFO L276 IsEmpty]: Start isEmpty. Operand 27119 states and 46098 transitions. [2023-11-21 19:57:27,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-11-21 19:57:27,470 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:57:27,470 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] [2023-11-21 19:57:27,507 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a34bd191-97ce-4748-845d-c207300a2f78/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-21 19:57:27,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a34bd191-97ce-4748-845d-c207300a2f78/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:57:27,685 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:57:27,685 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:57:27,685 INFO L85 PathProgramCache]: Analyzing trace with hash 1273596705, now seen corresponding path program 1 times [2023-11-21 19:57:27,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:57:27,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024137234] [2023-11-21 19:57:27,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:57:27,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:57:27,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:57:28,037 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:57:28,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024137234] [2023-11-21 19:57:28,037 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-21 19:57:28,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137097816] [2023-11-21 19:57:28,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:57:28,038 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:57:28,038 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a34bd191-97ce-4748-845d-c207300a2f78/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 19:57:28,041 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a34bd191-97ce-4748-845d-c207300a2f78/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 19:57:28,049 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a34bd191-97ce-4748-845d-c207300a2f78/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-21 19:57:29,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:57:29,939 INFO L262 TraceCheckSpWp]: Trace formula consists of 6734 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-21 19:57:29,947 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 19:57:29,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:57:29,970 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 19:57:29,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2137097816] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:57:29,971 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:57:29,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-21 19:57:29,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018701125] [2023-11-21 19:57:29,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:57:29,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 19:57:29,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:57:29,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 19:57:29,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 19:57:29,973 INFO L87 Difference]: Start difference. First operand 27119 states and 46098 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 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) [2023-11-21 19:57:32,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:57:32,282 INFO L93 Difference]: Finished difference Result 81226 states and 138098 transitions. [2023-11-21 19:57:32,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 19:57:32,283 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 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 28 [2023-11-21 19:57:32,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:57:32,724 INFO L225 Difference]: With dead ends: 81226 [2023-11-21 19:57:32,724 INFO L226 Difference]: Without dead ends: 54108 [2023-11-21 19:57:32,803 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 19:57:32,804 INFO L413 NwaCegarLoop]: 1470 mSDtfsCounter, 1462 mSDsluCounter, 1346 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1462 SdHoareTripleChecker+Valid, 2816 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-21 19:57:32,804 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1462 Valid, 2816 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-21 19:57:32,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54108 states.