./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 0e0057cc 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_606dcfe8-e340-4981-a9ff-63bde04389ef/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606dcfe8-e340-4981-a9ff-63bde04389ef/bin/utaipan-verify-nQ1chXbOIh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606dcfe8-e340-4981-a9ff-63bde04389ef/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606dcfe8-e340-4981-a9ff-63bde04389ef/bin/utaipan-verify-nQ1chXbOIh/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_606dcfe8-e340-4981-a9ff-63bde04389ef/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606dcfe8-e340-4981-a9ff-63bde04389ef/bin/utaipan-verify-nQ1chXbOIh --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 0.2.4-dev-0e0057c [2023-12-02 17:15:56,117 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 17:15:56,203 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606dcfe8-e340-4981-a9ff-63bde04389ef/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-64bit-Taipan_Default.epf [2023-12-02 17:15:56,208 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 17:15:56,209 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 17:15:56,235 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 17:15:56,235 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 17:15:56,236 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 17:15:56,237 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 17:15:56,237 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 17:15:56,238 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 17:15:56,238 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 17:15:56,239 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 17:15:56,239 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 17:15:56,240 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 17:15:56,240 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 17:15:56,241 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 17:15:56,241 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 17:15:56,242 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 17:15:56,242 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 17:15:56,243 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 17:15:56,244 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 17:15:56,244 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 17:15:56,245 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 17:15:56,245 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 17:15:56,246 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 17:15:56,246 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 17:15:56,247 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 17:15:56,247 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 17:15:56,248 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 17:15:56,248 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 17:15:56,249 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 17:15:56,249 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 17:15:56,250 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 17:15:56,250 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 17:15:56,251 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 17:15:56,251 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 17:15:56,251 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 17:15:56,251 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 17:15:56,251 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 17:15:56,252 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 17:15:56,252 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 17:15:56,252 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 17:15:56,252 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 17:15:56,253 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_606dcfe8-e340-4981-a9ff-63bde04389ef/bin/utaipan-verify-nQ1chXbOIh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606dcfe8-e340-4981-a9ff-63bde04389ef/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8cfca91e359676f221b9d3196f23901e359124e72b956d963114c00faf4f7248 [2023-12-02 17:15:56,514 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 17:15:56,539 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 17:15:56,541 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 17:15:56,543 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 17:15:56,543 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 17:15:56,544 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606dcfe8-e340-4981-a9ff-63bde04389ef/bin/utaipan-verify-nQ1chXbOIh/../../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 [2023-12-02 17:15:59,273 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 17:15:59,739 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 17:15:59,740 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606dcfe8-e340-4981-a9ff-63bde04389ef/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 [2023-12-02 17:15:59,779 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606dcfe8-e340-4981-a9ff-63bde04389ef/bin/utaipan-verify-nQ1chXbOIh/data/13c000d75/697e9c7b49bf4075b9e5ede37b96301b/FLAG42cf3c47f [2023-12-02 17:15:59,795 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606dcfe8-e340-4981-a9ff-63bde04389ef/bin/utaipan-verify-nQ1chXbOIh/data/13c000d75/697e9c7b49bf4075b9e5ede37b96301b [2023-12-02 17:15:59,797 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 17:15:59,799 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 17:15:59,801 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 17:15:59,801 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 17:15:59,806 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 17:15:59,807 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 05:15:59" (1/1) ... [2023-12-02 17:15:59,808 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@419c6abb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:15:59, skipping insertion in model container [2023-12-02 17:15:59,808 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 05:15:59" (1/1) ... [2023-12-02 17:15:59,943 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 17:16:00,411 WARN L1274 CHandler]: Detected problem Invalid redeclaration of the name show at C: (*show)(struct kobject___0 * , struct attribute___0 * , char * ) [6708] [2023-12-02 17:16:00,411 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] [2023-12-02 17:16:00,590 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_606dcfe8-e340-4981-a9ff-63bde04389ef/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] [2023-12-02 17:16:01,241 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 17:16:01,277 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 17:16:01,408 WARN L1274 CHandler]: Detected problem Invalid redeclaration of the name show at C: (*show)(struct kobject___0 * , struct attribute___0 * , char * ) [6708] [2023-12-02 17:16:01,409 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] [2023-12-02 17:16:01,413 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_606dcfe8-e340-4981-a9ff-63bde04389ef/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] [2023-12-02 17:16:01,618 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 17:16:01,669 INFO L206 MainTranslator]: Completed translation [2023-12-02 17:16:01,669 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:16:01 WrapperNode [2023-12-02 17:16:01,669 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 17:16:01,670 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 17:16:01,670 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 17:16:01,671 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 17:16:01,677 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:16:01" (1/1) ... [2023-12-02 17:16:01,735 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:16:01" (1/1) ... [2023-12-02 17:16:01,845 INFO L138 Inliner]: procedures = 151, calls = 1597, calls flagged for inlining = 53, calls inlined = 38, statements flattened = 2412 [2023-12-02 17:16:01,845 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 17:16:01,846 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 17:16:01,846 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 17:16:01,846 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 17:16:01,854 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:16:01" (1/1) ... [2023-12-02 17:16:01,855 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:16:01" (1/1) ... [2023-12-02 17:16:01,871 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:16:01" (1/1) ... [2023-12-02 17:16:01,872 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:16:01" (1/1) ... [2023-12-02 17:16:01,941 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:16:01" (1/1) ... [2023-12-02 17:16:01,953 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:16:01" (1/1) ... [2023-12-02 17:16:01,965 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:16:01" (1/1) ... [2023-12-02 17:16:01,978 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:16:01" (1/1) ... [2023-12-02 17:16:01,992 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 17:16:01,992 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 17:16:01,993 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 17:16:01,993 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 17:16:01,994 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:16:01" (1/1) ... [2023-12-02 17:16:01,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 17:16:02,008 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606dcfe8-e340-4981-a9ff-63bde04389ef/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:16:02,020 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606dcfe8-e340-4981-a9ff-63bde04389ef/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 17:16:02,028 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606dcfe8-e340-4981-a9ff-63bde04389ef/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 17:16:02,060 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2023-12-02 17:16:02,060 INFO L130 BoogieDeclarations]: Found specification of procedure usb_submit_urb [2023-12-02 17:16:02,061 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_submit_urb [2023-12-02 17:16:02,061 INFO L130 BoogieDeclarations]: Found specification of procedure handle_led [2023-12-02 17:16:02,061 INFO L138 BoogieDeclarations]: Found implementation of procedure handle_led [2023-12-02 17:16:02,061 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2023-12-02 17:16:02,061 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2023-12-02 17:16:02,061 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2023-12-02 17:16:02,062 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2023-12-02 17:16:02,062 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-12-02 17:16:02,062 INFO L130 BoogieDeclarations]: Found specification of procedure start_int_fifo [2023-12-02 17:16:02,062 INFO L138 BoogieDeclarations]: Found implementation of procedure start_int_fifo [2023-12-02 17:16:02,062 INFO L130 BoogieDeclarations]: Found specification of procedure symbolic [2023-12-02 17:16:02,062 INFO L138 BoogieDeclarations]: Found implementation of procedure symbolic [2023-12-02 17:16:02,063 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2023-12-02 17:16:02,063 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2023-12-02 17:16:02,063 INFO L130 BoogieDeclarations]: Found specification of procedure __create_pipe [2023-12-02 17:16:02,063 INFO L138 BoogieDeclarations]: Found implementation of procedure __create_pipe [2023-12-02 17:16:02,063 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2023-12-02 17:16:02,063 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2023-12-02 17:16:02,063 INFO L130 BoogieDeclarations]: Found specification of procedure usb_kill_urb [2023-12-02 17:16:02,064 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_kill_urb [2023-12-02 17:16:02,064 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_alloc_flags [2023-12-02 17:16:02,064 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_alloc_flags [2023-12-02 17:16:02,064 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2023-12-02 17:16:02,064 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2023-12-02 17:16:02,064 INFO L130 BoogieDeclarations]: Found specification of procedure start_isoc_chain [2023-12-02 17:16:02,065 INFO L138 BoogieDeclarations]: Found implementation of procedure start_isoc_chain [2023-12-02 17:16:02,065 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-12-02 17:16:02,065 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2023-12-02 17:16:02,065 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2023-12-02 17:16:02,065 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2023-12-02 17:16:02,065 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2023-12-02 17:16:02,065 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-12-02 17:16:02,065 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-12-02 17:16:02,066 INFO L130 BoogieDeclarations]: Found specification of procedure del_timer [2023-12-02 17:16:02,066 INFO L138 BoogieDeclarations]: Found implementation of procedure del_timer [2023-12-02 17:16:02,066 INFO L130 BoogieDeclarations]: Found specification of procedure timer_pending [2023-12-02 17:16:02,066 INFO L138 BoogieDeclarations]: Found implementation of procedure timer_pending [2023-12-02 17:16:02,066 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-12-02 17:16:02,066 INFO L130 BoogieDeclarations]: Found specification of procedure disable_suitable_timer_1 [2023-12-02 17:16:02,066 INFO L138 BoogieDeclarations]: Found implementation of procedure disable_suitable_timer_1 [2023-12-02 17:16:02,067 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 17:16:02,067 INFO L130 BoogieDeclarations]: Found specification of procedure set_led_bit [2023-12-02 17:16:02,067 INFO L138 BoogieDeclarations]: Found implementation of procedure set_led_bit [2023-12-02 17:16:02,067 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-02 17:16:02,067 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-12-02 17:16:02,067 INFO L130 BoogieDeclarations]: Found specification of procedure reg_timer_1 [2023-12-02 17:16:02,067 INFO L138 BoogieDeclarations]: Found implementation of procedure reg_timer_1 [2023-12-02 17:16:02,067 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-12-02 17:16:02,068 INFO L130 BoogieDeclarations]: Found specification of procedure usb_control_msg [2023-12-02 17:16:02,068 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_control_msg [2023-12-02 17:16:02,068 INFO L130 BoogieDeclarations]: Found specification of procedure usb_free_urb [2023-12-02 17:16:02,068 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_free_urb [2023-12-02 17:16:02,068 INFO L130 BoogieDeclarations]: Found specification of procedure ctrl_start_transfer [2023-12-02 17:16:02,068 INFO L138 BoogieDeclarations]: Found implementation of procedure ctrl_start_transfer [2023-12-02 17:16:02,068 INFO L130 BoogieDeclarations]: Found specification of procedure queue_control_request [2023-12-02 17:16:02,069 INFO L138 BoogieDeclarations]: Found implementation of procedure queue_control_request [2023-12-02 17:16:02,069 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-02 17:16:02,069 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-12-02 17:16:02,069 INFO L130 BoogieDeclarations]: Found specification of procedure printk [2023-12-02 17:16:02,069 INFO L138 BoogieDeclarations]: Found implementation of procedure printk [2023-12-02 17:16:02,069 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~TO~VOID [2023-12-02 17:16:02,069 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~TO~VOID [2023-12-02 17:16:02,069 INFO L130 BoogieDeclarations]: Found specification of procedure fill_isoc_urb [2023-12-02 17:16:02,070 INFO L138 BoogieDeclarations]: Found implementation of procedure fill_isoc_urb [2023-12-02 17:16:02,070 INFO L130 BoogieDeclarations]: Found specification of procedure usb_set_intfdata [2023-12-02 17:16:02,070 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_set_intfdata [2023-12-02 17:16:02,070 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 17:16:02,070 INFO L130 BoogieDeclarations]: Found specification of procedure usb_alloc_urb [2023-12-02 17:16:02,070 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_alloc_urb [2023-12-02 17:16:02,070 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2023-12-02 17:16:02,071 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2023-12-02 17:16:02,071 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2023-12-02 17:16:02,071 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 17:16:02,071 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 17:16:02,437 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 17:16:02,439 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 17:16:02,781 INFO L775 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2023-12-02 17:16:07,409 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 17:16:08,028 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 17:16:08,028 INFO L309 CfgBuilder]: Removed 0 assume(true) statements. [2023-12-02 17:16:08,030 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 05:16:08 BoogieIcfgContainer [2023-12-02 17:16:08,030 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 17:16:08,033 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 17:16:08,033 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 17:16:08,037 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 17:16:08,037 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 05:15:59" (1/3) ... [2023-12-02 17:16:08,038 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2428e9ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 05:16:08, skipping insertion in model container [2023-12-02 17:16:08,038 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:16:01" (2/3) ... [2023-12-02 17:16:08,039 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2428e9ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 05:16:08, skipping insertion in model container [2023-12-02 17:16:08,039 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 05:16:08" (3/3) ... [2023-12-02 17:16:08,040 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 [2023-12-02 17:16:08,061 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 17:16:08,061 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-02 17:16:08,124 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 17:16:08,131 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;@17711b3c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 17:16:08,131 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-02 17:16:08,138 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) [2023-12-02 17:16:08,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-12-02 17:16:08,151 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:16:08,151 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] [2023-12-02 17:16:08,152 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:16:08,157 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:16:08,158 INFO L85 PathProgramCache]: Analyzing trace with hash 1146220605, now seen corresponding path program 1 times [2023-12-02 17:16:08,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:16:08,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914944286] [2023-12-02 17:16:08,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:16:08,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:16:08,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:16:08,683 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:16:08,684 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:16:08,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914944286] [2023-12-02 17:16:08,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914944286] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:16:08,685 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:16:08,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 17:16:08,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213787639] [2023-12-02 17:16:08,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:16:08,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 17:16:08,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:16:08,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 17:16:08,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 17:16:08,721 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) [2023-12-02 17:16:11,367 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 17:16:13,375 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 17:16:14,633 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 17:16:15,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:16:15,217 INFO L93 Difference]: Finished difference Result 914 states and 1328 transitions. [2023-12-02 17:16:15,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 17:16:15,220 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 [2023-12-02 17:16:15,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:16:15,234 INFO L225 Difference]: With dead ends: 914 [2023-12-02 17:16:15,234 INFO L226 Difference]: Without dead ends: 465 [2023-12-02 17:16:15,241 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 [2023-12-02 17:16:15,245 INFO L413 NwaCegarLoop]: 543 mSDtfsCounter, 52 mSDsluCounter, 535 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 4 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.3s 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, 6.4s IncrementalHoareTripleChecker+Time [2023-12-02 17:16:15,246 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 1078 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 163 Invalid, 2 Unknown, 0 Unchecked, 6.4s Time] [2023-12-02 17:16:15,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2023-12-02 17:16:15,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 464. [2023-12-02 17:16:15,323 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) [2023-12-02 17:16:15,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 658 transitions. [2023-12-02 17:16:15,328 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 658 transitions. Word has length 29 [2023-12-02 17:16:15,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:16:15,328 INFO L495 AbstractCegarLoop]: Abstraction has 464 states and 658 transitions. [2023-12-02 17:16:15,328 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) [2023-12-02 17:16:15,328 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 658 transitions. [2023-12-02 17:16:15,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-12-02 17:16:15,332 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:16:15,332 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] [2023-12-02 17:16:15,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-02 17:16:15,332 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:16:15,333 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:16:15,333 INFO L85 PathProgramCache]: Analyzing trace with hash 506505812, now seen corresponding path program 1 times [2023-12-02 17:16:15,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:16:15,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402259467] [2023-12-02 17:16:15,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:16:15,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:16:15,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:16:15,617 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-12-02 17:16:15,617 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:16:15,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402259467] [2023-12-02 17:16:15,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402259467] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:16:15,618 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:16:15,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 17:16:15,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408062905] [2023-12-02 17:16:15,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:16:15,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 17:16:15,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:16:15,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 17:16:15,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 17:16:15,622 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) [2023-12-02 17:16:18,339 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 17:16:20,348 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 17:16:21,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:16:21,897 INFO L93 Difference]: Finished difference Result 924 states and 1314 transitions. [2023-12-02 17:16:21,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 17:16:21,898 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 [2023-12-02 17:16:21,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:16:21,903 INFO L225 Difference]: With dead ends: 924 [2023-12-02 17:16:21,903 INFO L226 Difference]: Without dead ends: 471 [2023-12-02 17:16:21,904 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 [2023-12-02 17:16:21,905 INFO L413 NwaCegarLoop]: 537 mSDtfsCounter, 2 mSDsluCounter, 528 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.1s 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, 6.2s IncrementalHoareTripleChecker+Time [2023-12-02 17:16:21,906 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 1065 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 161 Invalid, 2 Unknown, 0 Unchecked, 6.2s Time] [2023-12-02 17:16:21,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2023-12-02 17:16:21,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 469. [2023-12-02 17:16:21,930 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) [2023-12-02 17:16:21,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 665 transitions. [2023-12-02 17:16:21,934 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 665 transitions. Word has length 49 [2023-12-02 17:16:21,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:16:21,934 INFO L495 AbstractCegarLoop]: Abstraction has 469 states and 665 transitions. [2023-12-02 17:16:21,934 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) [2023-12-02 17:16:21,934 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 665 transitions. [2023-12-02 17:16:21,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-12-02 17:16:21,937 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:16:21,937 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] [2023-12-02 17:16:21,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-02 17:16:21,937 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:16:21,937 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:16:21,937 INFO L85 PathProgramCache]: Analyzing trace with hash 1561627198, now seen corresponding path program 1 times [2023-12-02 17:16:21,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:16:21,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813178004] [2023-12-02 17:16:21,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:16:21,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:16:22,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:16:22,185 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-12-02 17:16:22,185 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:16:22,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813178004] [2023-12-02 17:16:22,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813178004] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:16:22,186 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:16:22,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 17:16:22,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449932737] [2023-12-02 17:16:22,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:16:22,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 17:16:22,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:16:22,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 17:16:22,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 17:16:22,188 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) [2023-12-02 17:16:24,801 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 17:16:26,809 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 17:16:28,034 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 17:16:29,251 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 17:16:29,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:16:29,307 INFO L93 Difference]: Finished difference Result 943 states and 1342 transitions. [2023-12-02 17:16:29,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 17:16:29,308 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 [2023-12-02 17:16:29,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:16:29,313 INFO L225 Difference]: With dead ends: 943 [2023-12-02 17:16:29,314 INFO L226 Difference]: Without dead ends: 485 [2023-12-02 17:16:29,316 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 [2023-12-02 17:16:29,317 INFO L413 NwaCegarLoop]: 533 mSDtfsCounter, 15 mSDsluCounter, 529 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.0s 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, 7.1s IncrementalHoareTripleChecker+Time [2023-12-02 17:16:29,318 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 1062 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 160 Invalid, 2 Unknown, 0 Unchecked, 7.1s Time] [2023-12-02 17:16:29,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2023-12-02 17:16:29,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 474. [2023-12-02 17:16:29,350 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) [2023-12-02 17:16:29,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 474 states to 474 states and 672 transitions. [2023-12-02 17:16:29,355 INFO L78 Accepts]: Start accepts. Automaton has 474 states and 672 transitions. Word has length 51 [2023-12-02 17:16:29,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:16:29,356 INFO L495 AbstractCegarLoop]: Abstraction has 474 states and 672 transitions. [2023-12-02 17:16:29,356 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) [2023-12-02 17:16:29,356 INFO L276 IsEmpty]: Start isEmpty. Operand 474 states and 672 transitions. [2023-12-02 17:16:29,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-12-02 17:16:29,360 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:16:29,360 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] [2023-12-02 17:16:29,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-02 17:16:29,360 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:16:29,361 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:16:29,361 INFO L85 PathProgramCache]: Analyzing trace with hash 290660102, now seen corresponding path program 1 times [2023-12-02 17:16:29,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:16:29,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605777567] [2023-12-02 17:16:29,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:16:29,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:16:29,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:16:29,822 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 17:16:29,822 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:16:29,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605777567] [2023-12-02 17:16:29,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605777567] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:16:29,823 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:16:29,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 17:16:29,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533780042] [2023-12-02 17:16:29,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:16:29,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 17:16:29,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:16:29,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 17:16:29,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 17:16:29,825 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) [2023-12-02 17:16:32,290 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 17:16:33,752 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.43s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 17:16:33,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:16:33,831 INFO L93 Difference]: Finished difference Result 1048 states and 1480 transitions. [2023-12-02 17:16:33,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 17:16:33,831 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 [2023-12-02 17:16:33,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:16:33,836 INFO L225 Difference]: With dead ends: 1048 [2023-12-02 17:16:33,837 INFO L226 Difference]: Without dead ends: 585 [2023-12-02 17:16:33,839 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 [2023-12-02 17:16:33,840 INFO L413 NwaCegarLoop]: 654 mSDtfsCounter, 500 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 4 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s 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, 4.0s IncrementalHoareTripleChecker+Time [2023-12-02 17:16:33,840 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [500 Valid, 870 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 130 Invalid, 1 Unknown, 0 Unchecked, 4.0s Time] [2023-12-02 17:16:33,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states. [2023-12-02 17:16:33,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 581. [2023-12-02 17:16:33,872 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) [2023-12-02 17:16:33,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 581 states to 581 states and 814 transitions. [2023-12-02 17:16:33,877 INFO L78 Accepts]: Start accepts. Automaton has 581 states and 814 transitions. Word has length 59 [2023-12-02 17:16:33,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:16:33,878 INFO L495 AbstractCegarLoop]: Abstraction has 581 states and 814 transitions. [2023-12-02 17:16:33,878 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) [2023-12-02 17:16:33,879 INFO L276 IsEmpty]: Start isEmpty. Operand 581 states and 814 transitions. [2023-12-02 17:16:33,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-12-02 17:16:33,881 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:16:33,881 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] [2023-12-02 17:16:33,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-12-02 17:16:33,881 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:16:33,882 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:16:33,882 INFO L85 PathProgramCache]: Analyzing trace with hash -138482205, now seen corresponding path program 1 times [2023-12-02 17:16:33,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:16:33,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555243490] [2023-12-02 17:16:33,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:16:33,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:16:33,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:16:34,165 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-12-02 17:16:34,166 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:16:34,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555243490] [2023-12-02 17:16:34,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555243490] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:16:34,167 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:16:34,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 17:16:34,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685127201] [2023-12-02 17:16:34,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:16:34,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 17:16:34,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:16:34,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 17:16:34,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 17:16:34,169 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) [2023-12-02 17:16:37,088 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 17:16:38,736 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 17:16:40,795 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 17:16:42,804 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 17:16:42,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:16:42,847 INFO L93 Difference]: Finished difference Result 1286 states and 1827 transitions. [2023-12-02 17:16:42,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 17:16:42,847 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 [2023-12-02 17:16:42,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:16:42,852 INFO L225 Difference]: With dead ends: 1286 [2023-12-02 17:16:42,852 INFO L226 Difference]: Without dead ends: 716 [2023-12-02 17:16:42,854 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 [2023-12-02 17:16:42,855 INFO L413 NwaCegarLoop]: 534 mSDtfsCounter, 105 mSDsluCounter, 528 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 3 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 1062 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.6s IncrementalHoareTripleChecker+Time [2023-12-02 17:16:42,855 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [158 Valid, 1062 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 164 Invalid, 3 Unknown, 0 Unchecked, 8.6s Time] [2023-12-02 17:16:42,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 716 states. [2023-12-02 17:16:42,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 716 to 582. [2023-12-02 17:16:42,891 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) [2023-12-02 17:16:42,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 582 states to 582 states and 815 transitions. [2023-12-02 17:16:42,896 INFO L78 Accepts]: Start accepts. Automaton has 582 states and 815 transitions. Word has length 68 [2023-12-02 17:16:42,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:16:42,896 INFO L495 AbstractCegarLoop]: Abstraction has 582 states and 815 transitions. [2023-12-02 17:16:42,896 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) [2023-12-02 17:16:42,896 INFO L276 IsEmpty]: Start isEmpty. Operand 582 states and 815 transitions. [2023-12-02 17:16:42,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-12-02 17:16:42,898 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:16:42,898 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] [2023-12-02 17:16:42,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-12-02 17:16:42,899 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:16:42,899 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:16:42,899 INFO L85 PathProgramCache]: Analyzing trace with hash 979423981, now seen corresponding path program 1 times [2023-12-02 17:16:42,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:16:42,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071463835] [2023-12-02 17:16:42,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:16:42,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:16:42,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:16:43,217 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-12-02 17:16:43,217 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:16:43,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071463835] [2023-12-02 17:16:43,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071463835] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:16:43,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706602654] [2023-12-02 17:16:43,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:16:43,218 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:16:43,218 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606dcfe8-e340-4981-a9ff-63bde04389ef/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:16:43,222 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606dcfe8-e340-4981-a9ff-63bde04389ef/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:16:43,227 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_606dcfe8-e340-4981-a9ff-63bde04389ef/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-02 17:16:43,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:16:43,887 INFO L262 TraceCheckSpWp]: Trace formula consists of 2341 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 17:16:43,895 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:16:43,939 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-12-02 17:16:43,939 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:16:43,979 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-12-02 17:16:43,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1706602654] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:16:43,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2012276600] [2023-12-02 17:16:44,003 INFO L159 IcfgInterpreter]: Started Sifa with 54 locations of interest [2023-12-02 17:16:44,003 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:16:44,007 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:16:44,013 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:16:44,014 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:25:48,675 WARN L293 SmtUtils]: Spent 6.78s on a formula simplification. DAG size of input: 3956 DAG size of output: 3956 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm)