./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--isdn--hisax--hfc_usb.ko-entry_point.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_64ba0493-dd3d-411d-bd5e-93acc8eca29f/bin/utaipan-verify-t7M7D8N6sZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64ba0493-dd3d-411d-bd5e-93acc8eca29f/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_64ba0493-dd3d-411d-bd5e-93acc8eca29f/bin/utaipan-verify-t7M7D8N6sZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64ba0493-dd3d-411d-bd5e-93acc8eca29f/bin/utaipan-verify-t7M7D8N6sZ/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--isdn--hisax--hfc_usb.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64ba0493-dd3d-411d-bd5e-93acc8eca29f/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_64ba0493-dd3d-411d-bd5e-93acc8eca29f/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 8cfca91e359676f221b9d3196f23901e359124e72b956d963114c00faf4f7248 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 05:11:06,897 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 05:11:07,039 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64ba0493-dd3d-411d-bd5e-93acc8eca29f/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-64bit-Taipan_Default.epf [2023-11-19 05:11:07,045 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 05:11:07,046 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 05:11:07,070 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 05:11:07,071 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 05:11:07,072 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 05:11:07,073 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 05:11:07,073 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 05:11:07,074 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-19 05:11:07,074 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-19 05:11:07,075 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-19 05:11:07,075 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-19 05:11:07,076 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-19 05:11:07,076 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-19 05:11:07,077 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-19 05:11:07,078 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-19 05:11:07,078 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-19 05:11:07,079 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-19 05:11:07,079 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-19 05:11:07,080 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-19 05:11:07,081 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 05:11:07,081 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 05:11:07,081 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 05:11:07,082 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 05:11:07,082 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 05:11:07,083 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 05:11:07,083 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 05:11:07,084 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 05:11:07,084 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 05:11:07,084 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 05:11:07,085 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 05:11:07,085 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 05:11:07,086 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 05:11:07,086 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 05:11:07,087 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 05:11:07,087 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-19 05:11:07,088 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 05:11:07,088 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 05:11:07,088 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-19 05:11:07,089 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 05:11:07,090 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_64ba0493-dd3d-411d-bd5e-93acc8eca29f/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64ba0493-dd3d-411d-bd5e-93acc8eca29f/bin/utaipan-verify-t7M7D8N6sZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8cfca91e359676f221b9d3196f23901e359124e72b956d963114c00faf4f7248 [2023-11-19 05:11:07,380 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 05:11:07,441 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 05:11:07,444 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 05:11:07,462 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 05:11:07,463 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 05:11:07,464 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64ba0493-dd3d-411d-bd5e-93acc8eca29f/bin/utaipan-verify-t7M7D8N6sZ/../../sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--isdn--hisax--hfc_usb.ko-entry_point.cil.out.i [2023-11-19 05:11:10,822 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 05:11:11,605 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 05:11:11,607 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64ba0493-dd3d-411d-bd5e-93acc8eca29f/sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--isdn--hisax--hfc_usb.ko-entry_point.cil.out.i [2023-11-19 05:11:11,661 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64ba0493-dd3d-411d-bd5e-93acc8eca29f/bin/utaipan-verify-t7M7D8N6sZ/data/79802d2b4/c812d6ccc54b4d999505871c97e02b28/FLAGba6e41546 [2023-11-19 05:11:11,685 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64ba0493-dd3d-411d-bd5e-93acc8eca29f/bin/utaipan-verify-t7M7D8N6sZ/data/79802d2b4/c812d6ccc54b4d999505871c97e02b28 [2023-11-19 05:11:11,693 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 05:11:11,695 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 05:11:11,699 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 05:11:11,699 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 05:11:11,705 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 05:11:11,705 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:11:11" (1/1) ... [2023-11-19 05:11:11,706 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@318c005 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:11:11, skipping insertion in model container [2023-11-19 05:11:11,707 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:11:11" (1/1) ... [2023-11-19 05:11:11,870 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 05:11:12,443 WARN L1274 CHandler]: Detected problem Invalid redeclaration of the name show at C: (*show)(struct kobject___0 * , struct attribute___0 * , char * ) [6708] [2023-11-19 05:11:12,444 WARN L1274 CHandler]: Detected problem Invalid redeclaration of the name store at C: (*store)(struct kobject___0 * , struct attribute___0 * , char const * , size_t ) [6709-6710] [2023-11-19 05:11:12,604 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_64ba0493-dd3d-411d-bd5e-93acc8eca29f/sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--isdn--hisax--hfc_usb.ko-entry_point.cil.out.i[192641,192654] [2023-11-19 05:11:13,633 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 05:11:13,684 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 05:11:13,894 WARN L1274 CHandler]: Detected problem Invalid redeclaration of the name show at C: (*show)(struct kobject___0 * , struct attribute___0 * , char * ) [6708] [2023-11-19 05:11:13,894 WARN L1274 CHandler]: Detected problem Invalid redeclaration of the name store at C: (*store)(struct kobject___0 * , struct attribute___0 * , char const * , size_t ) [6709-6710] [2023-11-19 05:11:13,901 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_64ba0493-dd3d-411d-bd5e-93acc8eca29f/sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--isdn--hisax--hfc_usb.ko-entry_point.cil.out.i[192641,192654] [2023-11-19 05:11:14,203 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 05:11:14,287 INFO L206 MainTranslator]: Completed translation [2023-11-19 05:11:14,288 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:11:14 WrapperNode [2023-11-19 05:11:14,288 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 05:11:14,290 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 05:11:14,290 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 05:11:14,290 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 05:11:14,303 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:11:14" (1/1) ... [2023-11-19 05:11:14,430 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:11:14" (1/1) ... [2023-11-19 05:11:14,619 INFO L138 Inliner]: procedures = 151, calls = 1597, calls flagged for inlining = 53, calls inlined = 38, statements flattened = 2370 [2023-11-19 05:11:14,620 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 05:11:14,621 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 05:11:14,621 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 05:11:14,621 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 05:11:14,634 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:11:14" (1/1) ... [2023-11-19 05:11:14,635 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:11:14" (1/1) ... [2023-11-19 05:11:14,679 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:11:14" (1/1) ... [2023-11-19 05:11:14,680 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:11:14" (1/1) ... [2023-11-19 05:11:14,896 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:11:14" (1/1) ... [2023-11-19 05:11:14,924 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:11:14" (1/1) ... [2023-11-19 05:11:14,952 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:11:14" (1/1) ... [2023-11-19 05:11:14,978 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:11:14" (1/1) ... [2023-11-19 05:11:15,006 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 05:11:15,008 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 05:11:15,009 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 05:11:15,009 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 05:11:15,010 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:11:14" (1/1) ... [2023-11-19 05:11:15,018 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 05:11:15,032 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64ba0493-dd3d-411d-bd5e-93acc8eca29f/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:11:15,052 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64ba0493-dd3d-411d-bd5e-93acc8eca29f/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 05:11:15,084 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64ba0493-dd3d-411d-bd5e-93acc8eca29f/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 05:11:15,103 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2023-11-19 05:11:15,103 INFO L130 BoogieDeclarations]: Found specification of procedure usb_submit_urb [2023-11-19 05:11:15,103 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_submit_urb [2023-11-19 05:11:15,104 INFO L130 BoogieDeclarations]: Found specification of procedure handle_led [2023-11-19 05:11:15,105 INFO L138 BoogieDeclarations]: Found implementation of procedure handle_led [2023-11-19 05:11:15,106 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2023-11-19 05:11:15,106 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2023-11-19 05:11:15,106 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2023-11-19 05:11:15,106 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2023-11-19 05:11:15,107 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 05:11:15,107 INFO L130 BoogieDeclarations]: Found specification of procedure start_int_fifo [2023-11-19 05:11:15,107 INFO L138 BoogieDeclarations]: Found implementation of procedure start_int_fifo [2023-11-19 05:11:15,107 INFO L130 BoogieDeclarations]: Found specification of procedure symbolic [2023-11-19 05:11:15,107 INFO L138 BoogieDeclarations]: Found implementation of procedure symbolic [2023-11-19 05:11:15,108 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2023-11-19 05:11:15,108 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2023-11-19 05:11:15,108 INFO L130 BoogieDeclarations]: Found specification of procedure __create_pipe [2023-11-19 05:11:15,109 INFO L138 BoogieDeclarations]: Found implementation of procedure __create_pipe [2023-11-19 05:11:15,109 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2023-11-19 05:11:15,109 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2023-11-19 05:11:15,109 INFO L130 BoogieDeclarations]: Found specification of procedure usb_kill_urb [2023-11-19 05:11:15,110 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_kill_urb [2023-11-19 05:11:15,110 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_alloc_flags [2023-11-19 05:11:15,111 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_alloc_flags [2023-11-19 05:11:15,111 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2023-11-19 05:11:15,112 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2023-11-19 05:11:15,112 INFO L130 BoogieDeclarations]: Found specification of procedure start_isoc_chain [2023-11-19 05:11:15,113 INFO L138 BoogieDeclarations]: Found implementation of procedure start_isoc_chain [2023-11-19 05:11:15,113 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 05:11:15,113 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2023-11-19 05:11:15,113 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2023-11-19 05:11:15,114 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2023-11-19 05:11:15,114 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2023-11-19 05:11:15,114 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-19 05:11:15,114 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-19 05:11:15,114 INFO L130 BoogieDeclarations]: Found specification of procedure del_timer [2023-11-19 05:11:15,115 INFO L138 BoogieDeclarations]: Found implementation of procedure del_timer [2023-11-19 05:11:15,115 INFO L130 BoogieDeclarations]: Found specification of procedure timer_pending [2023-11-19 05:11:15,115 INFO L138 BoogieDeclarations]: Found implementation of procedure timer_pending [2023-11-19 05:11:15,115 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-19 05:11:15,115 INFO L130 BoogieDeclarations]: Found specification of procedure disable_suitable_timer_1 [2023-11-19 05:11:15,116 INFO L138 BoogieDeclarations]: Found implementation of procedure disable_suitable_timer_1 [2023-11-19 05:11:15,116 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 05:11:15,116 INFO L130 BoogieDeclarations]: Found specification of procedure set_led_bit [2023-11-19 05:11:15,116 INFO L138 BoogieDeclarations]: Found implementation of procedure set_led_bit [2023-11-19 05:11:15,116 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 05:11:15,116 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-19 05:11:15,117 INFO L130 BoogieDeclarations]: Found specification of procedure reg_timer_1 [2023-11-19 05:11:15,117 INFO L138 BoogieDeclarations]: Found implementation of procedure reg_timer_1 [2023-11-19 05:11:15,117 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-19 05:11:15,117 INFO L130 BoogieDeclarations]: Found specification of procedure usb_control_msg [2023-11-19 05:11:15,117 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_control_msg [2023-11-19 05:11:15,118 INFO L130 BoogieDeclarations]: Found specification of procedure usb_free_urb [2023-11-19 05:11:15,118 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_free_urb [2023-11-19 05:11:15,118 INFO L130 BoogieDeclarations]: Found specification of procedure ctrl_start_transfer [2023-11-19 05:11:15,118 INFO L138 BoogieDeclarations]: Found implementation of procedure ctrl_start_transfer [2023-11-19 05:11:15,118 INFO L130 BoogieDeclarations]: Found specification of procedure queue_control_request [2023-11-19 05:11:15,119 INFO L138 BoogieDeclarations]: Found implementation of procedure queue_control_request [2023-11-19 05:11:15,119 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 05:11:15,120 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-19 05:11:15,121 INFO L130 BoogieDeclarations]: Found specification of procedure printk [2023-11-19 05:11:15,122 INFO L138 BoogieDeclarations]: Found implementation of procedure printk [2023-11-19 05:11:15,122 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~TO~VOID [2023-11-19 05:11:15,122 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~TO~VOID [2023-11-19 05:11:15,122 INFO L130 BoogieDeclarations]: Found specification of procedure fill_isoc_urb [2023-11-19 05:11:15,123 INFO L138 BoogieDeclarations]: Found implementation of procedure fill_isoc_urb [2023-11-19 05:11:15,123 INFO L130 BoogieDeclarations]: Found specification of procedure usb_set_intfdata [2023-11-19 05:11:15,123 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_set_intfdata [2023-11-19 05:11:15,123 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 05:11:15,123 INFO L130 BoogieDeclarations]: Found specification of procedure usb_alloc_urb [2023-11-19 05:11:15,124 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_alloc_urb [2023-11-19 05:11:15,125 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2023-11-19 05:11:15,125 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2023-11-19 05:11:15,125 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2023-11-19 05:11:15,126 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 05:11:15,126 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 05:11:15,612 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 05:11:15,620 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 05:11:16,068 INFO L767 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2023-11-19 05:11:21,664 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 05:11:22,629 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 05:11:22,630 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-19 05:11:22,646 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:11:22 BoogieIcfgContainer [2023-11-19 05:11:22,647 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 05:11:22,652 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 05:11:22,652 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 05:11:22,656 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 05:11:22,656 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 05:11:11" (1/3) ... [2023-11-19 05:11:22,658 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31c6149b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:11:22, skipping insertion in model container [2023-11-19 05:11:22,658 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:11:14" (2/3) ... [2023-11-19 05:11:22,659 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31c6149b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:11:22, skipping insertion in model container [2023-11-19 05:11:22,659 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:11:22" (3/3) ... [2023-11-19 05:11:22,661 INFO L112 eAbstractionObserver]: Analyzing ICFG 43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--isdn--hisax--hfc_usb.ko-entry_point.cil.out.i [2023-11-19 05:11:22,684 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 05:11:22,685 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 05:11:22,779 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 05:11:22,790 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;@37b72000, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-19 05:11:22,790 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-19 05:11:22,801 INFO L276 IsEmpty]: Start isEmpty. Operand has 439 states, 282 states have (on average 1.3439716312056738) internal successors, (379), 290 states have internal predecessors, (379), 126 states have call successors, (126), 30 states have call predecessors, (126), 29 states have return successors, (123), 123 states have call predecessors, (123), 123 states have call successors, (123) [2023-11-19 05:11:22,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-11-19 05:11:22,819 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:11:22,819 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 05:11:22,820 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:11:22,828 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:11:22,829 INFO L85 PathProgramCache]: Analyzing trace with hash -879341525, now seen corresponding path program 1 times [2023-11-19 05:11:22,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:11:22,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900455650] [2023-11-19 05:11:22,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:11:22,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:11:23,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:11:23,534 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 05:11:23,535 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:11:23,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900455650] [2023-11-19 05:11:23,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900455650] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:11:23,537 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:11:23,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 05:11:23,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720778061] [2023-11-19 05:11:23,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:11:23,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:11:23,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:11:23,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:11:23,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:11:23,581 INFO L87 Difference]: Start difference. First operand has 439 states, 282 states have (on average 1.3439716312056738) internal successors, (379), 290 states have internal predecessors, (379), 126 states have call successors, (126), 30 states have call predecessors, (126), 29 states have return successors, (123), 123 states have call predecessors, (123), 123 states have call successors, (123) Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-19 05:11:26,335 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-19 05:11:28,344 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-19 05:11:29,960 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-19 05:11:30,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:11:30,017 INFO L93 Difference]: Finished difference Result 914 states and 1328 transitions. [2023-11-19 05:11:30,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:11:30,020 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (4), 2 states have call predecessors, (4), 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 05:11:30,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:11:30,036 INFO L225 Difference]: With dead ends: 914 [2023-11-19 05:11:30,036 INFO L226 Difference]: Without dead ends: 465 [2023-11-19 05:11:30,046 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 05:11:30,050 INFO L413 NwaCegarLoop]: 543 mSDtfsCounter, 52 mSDsluCounter, 535 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 4 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 1078 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.3s IncrementalHoareTripleChecker+Time [2023-11-19 05:11:30,050 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 1078 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 163 Invalid, 2 Unknown, 0 Unchecked, 6.3s Time] [2023-11-19 05:11:30,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2023-11-19 05:11:30,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 464. [2023-11-19 05:11:30,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 464 states, 305 states have (on average 1.3344262295081968) internal successors, (407), 309 states have internal predecessors, (407), 126 states have call successors, (126), 33 states have call predecessors, (126), 32 states have return successors, (125), 124 states have call predecessors, (125), 125 states have call successors, (125) [2023-11-19 05:11:30,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 658 transitions. [2023-11-19 05:11:30,151 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 658 transitions. Word has length 29 [2023-11-19 05:11:30,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:11:30,152 INFO L495 AbstractCegarLoop]: Abstraction has 464 states and 658 transitions. [2023-11-19 05:11:30,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-19 05:11:30,152 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 658 transitions. [2023-11-19 05:11:30,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-11-19 05:11:30,156 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:11:30,156 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:11:30,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 05:11:30,157 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:11:30,158 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:11:30,158 INFO L85 PathProgramCache]: Analyzing trace with hash 893981671, now seen corresponding path program 1 times [2023-11-19 05:11:30,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:11:30,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001471832] [2023-11-19 05:11:30,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:11:30,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:11:30,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:11:30,550 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-19 05:11:30,551 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:11:30,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001471832] [2023-11-19 05:11:30,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001471832] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:11:30,551 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:11:30,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 05:11:30,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966002185] [2023-11-19 05:11:30,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:11:30,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:11:30,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:11:30,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:11:30,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:11:30,555 INFO L87 Difference]: Start difference. First operand 464 states and 658 transitions. Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-19 05:11:33,144 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-19 05:11:35,153 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-19 05:11:37,466 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.56s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-19 05:11:37,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:11:37,540 INFO L93 Difference]: Finished difference Result 924 states and 1314 transitions. [2023-11-19 05:11:37,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:11:37,542 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 49 [2023-11-19 05:11:37,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:11:37,551 INFO L225 Difference]: With dead ends: 924 [2023-11-19 05:11:37,551 INFO L226 Difference]: Without dead ends: 471 [2023-11-19 05:11:37,555 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 05:11:37,556 INFO L413 NwaCegarLoop]: 537 mSDtfsCounter, 2 mSDsluCounter, 528 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 1065 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.9s IncrementalHoareTripleChecker+Time [2023-11-19 05:11:37,557 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 1065 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 161 Invalid, 2 Unknown, 0 Unchecked, 6.9s Time] [2023-11-19 05:11:37,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2023-11-19 05:11:37,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 469. [2023-11-19 05:11:37,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 469 states, 309 states have (on average 1.3333333333333333) internal successors, (412), 313 states have internal predecessors, (412), 127 states have call successors, (127), 33 states have call predecessors, (127), 32 states have return successors, (126), 125 states have call predecessors, (126), 126 states have call successors, (126) [2023-11-19 05:11:37,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 665 transitions. [2023-11-19 05:11:37,611 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 665 transitions. Word has length 49 [2023-11-19 05:11:37,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:11:37,612 INFO L495 AbstractCegarLoop]: Abstraction has 469 states and 665 transitions. [2023-11-19 05:11:37,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-19 05:11:37,613 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 665 transitions. [2023-11-19 05:11:37,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-11-19 05:11:37,616 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:11:37,617 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:11:37,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 05:11:37,617 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:11:37,618 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:11:37,618 INFO L85 PathProgramCache]: Analyzing trace with hash 1736057968, now seen corresponding path program 1 times [2023-11-19 05:11:37,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:11:37,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522483676] [2023-11-19 05:11:37,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:11:37,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:11:37,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:11:37,910 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-19 05:11:37,910 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:11:37,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522483676] [2023-11-19 05:11:37,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522483676] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:11:37,911 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:11:37,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 05:11:37,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849987240] [2023-11-19 05:11:37,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:11:37,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:11:37,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:11:37,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:11:37,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:11:37,917 INFO L87 Difference]: Start difference. First operand 469 states and 665 transitions. Second operand has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-19 05:11:40,601 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-19 05:11:42,609 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-19 05:11:44,206 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.54s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-19 05:11:45,670 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.46s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-19 05:11:45,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:11:45,741 INFO L93 Difference]: Finished difference Result 943 states and 1342 transitions. [2023-11-19 05:11:45,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:11:45,742 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 51 [2023-11-19 05:11:45,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:11:45,747 INFO L225 Difference]: With dead ends: 943 [2023-11-19 05:11:45,748 INFO L226 Difference]: Without dead ends: 485 [2023-11-19 05:11:45,750 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 05:11:45,752 INFO L413 NwaCegarLoop]: 533 mSDtfsCounter, 15 mSDsluCounter, 529 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 1062 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.8s IncrementalHoareTripleChecker+Time [2023-11-19 05:11:45,753 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 1062 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 160 Invalid, 2 Unknown, 0 Unchecked, 7.8s Time] [2023-11-19 05:11:45,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2023-11-19 05:11:45,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 474. [2023-11-19 05:11:45,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 474 states, 314 states have (on average 1.3343949044585988) internal successors, (419), 318 states have internal predecessors, (419), 127 states have call successors, (127), 33 states have call predecessors, (127), 32 states have return successors, (126), 125 states have call predecessors, (126), 126 states have call successors, (126) [2023-11-19 05:11:45,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 474 states to 474 states and 672 transitions. [2023-11-19 05:11:45,798 INFO L78 Accepts]: Start accepts. Automaton has 474 states and 672 transitions. Word has length 51 [2023-11-19 05:11:45,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:11:45,799 INFO L495 AbstractCegarLoop]: Abstraction has 474 states and 672 transitions. [2023-11-19 05:11:45,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-19 05:11:45,799 INFO L276 IsEmpty]: Start isEmpty. Operand 474 states and 672 transitions. [2023-11-19 05:11:45,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-11-19 05:11:45,803 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:11:45,804 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:11:45,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 05:11:45,804 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:11:45,805 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:11:45,805 INFO L85 PathProgramCache]: Analyzing trace with hash -1565257160, now seen corresponding path program 1 times [2023-11-19 05:11:45,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:11:45,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991943520] [2023-11-19 05:11:45,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:11:45,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:11:45,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:11:46,350 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-19 05:11:46,350 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:11:46,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991943520] [2023-11-19 05:11:46,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991943520] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:11:46,351 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:11:46,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 05:11:46,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036551197] [2023-11-19 05:11:46,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:11:46,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:11:46,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:11:46,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:11:46,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:11:46,355 INFO L87 Difference]: Start difference. First operand 474 states and 672 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-19 05:11:48,724 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-19 05:11:49,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:11:49,812 INFO L93 Difference]: Finished difference Result 1048 states and 1480 transitions. [2023-11-19 05:11:49,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:11:49,813 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 59 [2023-11-19 05:11:49,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:11:49,819 INFO L225 Difference]: With dead ends: 1048 [2023-11-19 05:11:49,819 INFO L226 Difference]: Without dead ends: 585 [2023-11-19 05:11:49,821 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 05:11:49,823 INFO L413 NwaCegarLoop]: 654 mSDtfsCounter, 500 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 4 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 500 SdHoareTripleChecker+Valid, 870 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2023-11-19 05:11:49,823 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [500 Valid, 870 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 130 Invalid, 1 Unknown, 0 Unchecked, 3.4s Time] [2023-11-19 05:11:49,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states. [2023-11-19 05:11:49,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 581. [2023-11-19 05:11:49,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 581 states, 388 states have (on average 1.3376288659793814) internal successors, (519), 394 states have internal predecessors, (519), 148 states have call successors, (148), 45 states have call predecessors, (148), 44 states have return successors, (147), 145 states have call predecessors, (147), 147 states have call successors, (147) [2023-11-19 05:11:49,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 581 states to 581 states and 814 transitions. [2023-11-19 05:11:49,866 INFO L78 Accepts]: Start accepts. Automaton has 581 states and 814 transitions. Word has length 59 [2023-11-19 05:11:49,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:11:49,866 INFO L495 AbstractCegarLoop]: Abstraction has 581 states and 814 transitions. [2023-11-19 05:11:49,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-19 05:11:49,867 INFO L276 IsEmpty]: Start isEmpty. Operand 581 states and 814 transitions. [2023-11-19 05:11:49,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-11-19 05:11:49,869 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:11:49,870 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:11:49,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-19 05:11:49,870 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:11:49,871 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:11:49,871 INFO L85 PathProgramCache]: Analyzing trace with hash 1925840434, now seen corresponding path program 1 times [2023-11-19 05:11:49,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:11:49,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064104429] [2023-11-19 05:11:49,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:11:49,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:11:50,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:11:50,291 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-19 05:11:50,291 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:11:50,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064104429] [2023-11-19 05:11:50,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064104429] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:11:50,293 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:11:50,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 05:11:50,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063890489] [2023-11-19 05:11:50,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:11:50,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:11:50,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:11:50,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:11:50,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:11:50,296 INFO L87 Difference]: Start difference. First operand 581 states and 814 transitions. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2023-11-19 05:11:53,199 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-19 05:11:54,409 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-19 05:11:57,293 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-19 05:11:59,301 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-19 05:11:59,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:11:59,337 INFO L93 Difference]: Finished difference Result 1286 states and 1827 transitions. [2023-11-19 05:11:59,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:11:59,338 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 68 [2023-11-19 05:11:59,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:11:59,345 INFO L225 Difference]: With dead ends: 1286 [2023-11-19 05:11:59,346 INFO L226 Difference]: Without dead ends: 716 [2023-11-19 05:11:59,348 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 05:11:59,349 INFO L413 NwaCegarLoop]: 537 mSDtfsCounter, 105 mSDsluCounter, 528 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 3 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 1065 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.0s IncrementalHoareTripleChecker+Time [2023-11-19 05:11:59,350 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [158 Valid, 1065 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 165 Invalid, 3 Unknown, 0 Unchecked, 9.0s Time] [2023-11-19 05:11:59,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 716 states. [2023-11-19 05:11:59,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 716 to 582. [2023-11-19 05:11:59,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 582 states, 389 states have (on average 1.3367609254498716) internal successors, (520), 395 states have internal predecessors, (520), 148 states have call successors, (148), 45 states have call predecessors, (148), 44 states have return successors, (147), 145 states have call predecessors, (147), 147 states have call successors, (147) [2023-11-19 05:11:59,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 582 states to 582 states and 815 transitions. [2023-11-19 05:11:59,396 INFO L78 Accepts]: Start accepts. Automaton has 582 states and 815 transitions. Word has length 68 [2023-11-19 05:11:59,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:11:59,397 INFO L495 AbstractCegarLoop]: Abstraction has 582 states and 815 transitions. [2023-11-19 05:11:59,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2023-11-19 05:11:59,397 INFO L276 IsEmpty]: Start isEmpty. Operand 582 states and 815 transitions. [2023-11-19 05:11:59,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-11-19 05:11:59,399 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:11:59,399 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:11:59,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-19 05:11:59,400 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:11:59,400 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:11:59,400 INFO L85 PathProgramCache]: Analyzing trace with hash 801719408, now seen corresponding path program 1 times [2023-11-19 05:11:59,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:11:59,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231533091] [2023-11-19 05:11:59,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:11:59,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:11:59,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:11:59,803 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-19 05:11:59,804 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:11:59,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231533091] [2023-11-19 05:11:59,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231533091] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:11:59,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030307510] [2023-11-19 05:11:59,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:11:59,805 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:11:59,805 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64ba0493-dd3d-411d-bd5e-93acc8eca29f/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:11:59,807 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64ba0493-dd3d-411d-bd5e-93acc8eca29f/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:11:59,813 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64ba0493-dd3d-411d-bd5e-93acc8eca29f/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 05:12:00,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:12:00,553 INFO L262 TraceCheckSpWp]: Trace formula consists of 2337 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 05:12:00,563 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:12:00,617 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-19 05:12:00,618 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 05:12:00,675 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-19 05:12:00,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1030307510] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 05:12:00,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [724290896] [2023-11-19 05:12:00,699 INFO L159 IcfgInterpreter]: Started Sifa with 54 locations of interest [2023-11-19 05:12:00,700 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 05:12:00,704 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 05:12:00,710 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 05:12:00,711 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs