./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 30e01a73 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_355cf634-7d67-4fbd-825a-05ee26ac5a38/bin/utaipan-verify-mE87zJ7Ire/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_355cf634-7d67-4fbd-825a-05ee26ac5a38/bin/utaipan-verify-mE87zJ7Ire/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_355cf634-7d67-4fbd-825a-05ee26ac5a38/bin/utaipan-verify-mE87zJ7Ire/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_355cf634-7d67-4fbd-825a-05ee26ac5a38/bin/utaipan-verify-mE87zJ7Ire/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_355cf634-7d67-4fbd-825a-05ee26ac5a38/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_355cf634-7d67-4fbd-825a-05ee26ac5a38/bin/utaipan-verify-mE87zJ7Ire --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 8cfca91e359676f221b9d3196f23901e359124e72b956d963114c00faf4f7248 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 20:32:17,047 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 20:32:17,117 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_355cf634-7d67-4fbd-825a-05ee26ac5a38/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-64bit-Taipan_Default.epf [2023-11-23 20:32:17,123 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 20:32:17,123 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 20:32:17,151 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 20:32:17,152 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 20:32:17,152 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 20:32:17,153 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 20:32:17,154 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 20:32:17,154 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-23 20:32:17,155 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-23 20:32:17,155 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-23 20:32:17,156 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-23 20:32:17,156 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-23 20:32:17,157 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-23 20:32:17,157 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-23 20:32:17,158 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-23 20:32:17,159 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-23 20:32:17,159 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-23 20:32:17,160 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-23 20:32:17,160 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-23 20:32:17,161 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 20:32:17,162 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 20:32:17,162 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 20:32:17,163 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 20:32:17,163 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 20:32:17,164 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 20:32:17,164 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 20:32:17,165 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 20:32:17,165 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 20:32:17,166 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 20:32:17,166 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 20:32:17,167 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 20:32:17,167 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 20:32:17,168 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 20:32:17,168 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 20:32:17,169 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 20:32:17,169 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-23 20:32:17,169 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 20:32:17,170 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 20:32:17,171 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 20:32:17,171 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-23 20:32:17,171 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 20:32:17,172 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_355cf634-7d67-4fbd-825a-05ee26ac5a38/bin/utaipan-verify-mE87zJ7Ire/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_355cf634-7d67-4fbd-825a-05ee26ac5a38/bin/utaipan-verify-mE87zJ7Ire Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8cfca91e359676f221b9d3196f23901e359124e72b956d963114c00faf4f7248 [2023-11-23 20:32:17,466 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 20:32:17,500 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 20:32:17,504 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 20:32:17,506 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 20:32:17,507 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 20:32:17,508 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_355cf634-7d67-4fbd-825a-05ee26ac5a38/bin/utaipan-verify-mE87zJ7Ire/../../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 [2023-11-23 20:32:20,675 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 20:32:21,393 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 20:32:21,393 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_355cf634-7d67-4fbd-825a-05ee26ac5a38/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 [2023-11-23 20:32:21,461 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_355cf634-7d67-4fbd-825a-05ee26ac5a38/bin/utaipan-verify-mE87zJ7Ire/data/d0485045c/28a1396f6ce84d7db610e463dd0c9079/FLAG748f714d1 [2023-11-23 20:32:21,480 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_355cf634-7d67-4fbd-825a-05ee26ac5a38/bin/utaipan-verify-mE87zJ7Ire/data/d0485045c/28a1396f6ce84d7db610e463dd0c9079 [2023-11-23 20:32:21,487 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 20:32:21,489 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 20:32:21,492 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 20:32:21,493 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 20:32:21,498 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 20:32:21,499 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:32:21" (1/1) ... [2023-11-23 20:32:21,501 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@38afca2f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:32:21, skipping insertion in model container [2023-11-23 20:32:21,501 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:32:21" (1/1) ... [2023-11-23 20:32:21,717 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 20:32:22,514 WARN L1274 CHandler]: Detected problem Invalid redeclaration of the name show at C: (*show)(struct kobject___0 * , struct attribute___0 * , char * ) [6708] [2023-11-23 20:32:22,515 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] [2023-11-23 20:32:22,700 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_355cf634-7d67-4fbd-825a-05ee26ac5a38/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] [2023-11-23 20:32:23,393 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 20:32:23,467 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 20:32:23,620 WARN L1274 CHandler]: Detected problem Invalid redeclaration of the name show at C: (*show)(struct kobject___0 * , struct attribute___0 * , char * ) [6708] [2023-11-23 20:32:23,621 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] [2023-11-23 20:32:23,626 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_355cf634-7d67-4fbd-825a-05ee26ac5a38/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] [2023-11-23 20:32:23,914 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 20:32:23,985 INFO L206 MainTranslator]: Completed translation [2023-11-23 20:32:23,986 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:32:23 WrapperNode [2023-11-23 20:32:23,986 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 20:32:23,988 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 20:32:23,988 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 20:32:23,988 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 20:32:23,996 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:32:23" (1/1) ... [2023-11-23 20:32:24,082 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:32:23" (1/1) ... [2023-11-23 20:32:24,213 INFO L138 Inliner]: procedures = 151, calls = 1597, calls flagged for inlining = 53, calls inlined = 38, statements flattened = 2370 [2023-11-23 20:32:24,214 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 20:32:24,214 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 20:32:24,215 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 20:32:24,215 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 20:32:24,225 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:32:23" (1/1) ... [2023-11-23 20:32:24,225 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:32:23" (1/1) ... [2023-11-23 20:32:24,241 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:32:23" (1/1) ... [2023-11-23 20:32:24,242 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:32:23" (1/1) ... [2023-11-23 20:32:24,390 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:32:23" (1/1) ... [2023-11-23 20:32:24,416 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:32:23" (1/1) ... [2023-11-23 20:32:24,448 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:32:23" (1/1) ... [2023-11-23 20:32:24,463 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:32:23" (1/1) ... [2023-11-23 20:32:24,500 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 20:32:24,501 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 20:32:24,501 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 20:32:24,502 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 20:32:24,503 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:32:23" (1/1) ... [2023-11-23 20:32:24,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 20:32:24,520 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_355cf634-7d67-4fbd-825a-05ee26ac5a38/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:32:24,533 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_355cf634-7d67-4fbd-825a-05ee26ac5a38/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 20:32:24,559 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_355cf634-7d67-4fbd-825a-05ee26ac5a38/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 20:32:24,578 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2023-11-23 20:32:24,578 INFO L130 BoogieDeclarations]: Found specification of procedure usb_submit_urb [2023-11-23 20:32:24,578 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_submit_urb [2023-11-23 20:32:24,579 INFO L130 BoogieDeclarations]: Found specification of procedure handle_led [2023-11-23 20:32:24,579 INFO L138 BoogieDeclarations]: Found implementation of procedure handle_led [2023-11-23 20:32:24,579 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2023-11-23 20:32:24,579 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2023-11-23 20:32:24,579 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2023-11-23 20:32:24,580 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2023-11-23 20:32:24,580 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-23 20:32:24,580 INFO L130 BoogieDeclarations]: Found specification of procedure start_int_fifo [2023-11-23 20:32:24,580 INFO L138 BoogieDeclarations]: Found implementation of procedure start_int_fifo [2023-11-23 20:32:24,580 INFO L130 BoogieDeclarations]: Found specification of procedure symbolic [2023-11-23 20:32:24,581 INFO L138 BoogieDeclarations]: Found implementation of procedure symbolic [2023-11-23 20:32:24,581 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2023-11-23 20:32:24,581 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2023-11-23 20:32:24,581 INFO L130 BoogieDeclarations]: Found specification of procedure __create_pipe [2023-11-23 20:32:24,582 INFO L138 BoogieDeclarations]: Found implementation of procedure __create_pipe [2023-11-23 20:32:24,582 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2023-11-23 20:32:24,582 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2023-11-23 20:32:24,582 INFO L130 BoogieDeclarations]: Found specification of procedure usb_kill_urb [2023-11-23 20:32:24,582 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_kill_urb [2023-11-23 20:32:24,582 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_alloc_flags [2023-11-23 20:32:24,583 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_alloc_flags [2023-11-23 20:32:24,583 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2023-11-23 20:32:24,583 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2023-11-23 20:32:24,583 INFO L130 BoogieDeclarations]: Found specification of procedure start_isoc_chain [2023-11-23 20:32:24,584 INFO L138 BoogieDeclarations]: Found implementation of procedure start_isoc_chain [2023-11-23 20:32:24,584 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-23 20:32:24,584 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2023-11-23 20:32:24,584 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2023-11-23 20:32:24,584 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2023-11-23 20:32:24,585 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2023-11-23 20:32:24,585 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-23 20:32:24,585 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-23 20:32:24,585 INFO L130 BoogieDeclarations]: Found specification of procedure del_timer [2023-11-23 20:32:24,585 INFO L138 BoogieDeclarations]: Found implementation of procedure del_timer [2023-11-23 20:32:24,586 INFO L130 BoogieDeclarations]: Found specification of procedure timer_pending [2023-11-23 20:32:24,586 INFO L138 BoogieDeclarations]: Found implementation of procedure timer_pending [2023-11-23 20:32:24,586 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-23 20:32:24,586 INFO L130 BoogieDeclarations]: Found specification of procedure disable_suitable_timer_1 [2023-11-23 20:32:24,586 INFO L138 BoogieDeclarations]: Found implementation of procedure disable_suitable_timer_1 [2023-11-23 20:32:24,587 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 20:32:24,587 INFO L130 BoogieDeclarations]: Found specification of procedure set_led_bit [2023-11-23 20:32:24,587 INFO L138 BoogieDeclarations]: Found implementation of procedure set_led_bit [2023-11-23 20:32:24,587 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-23 20:32:24,587 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-23 20:32:24,587 INFO L130 BoogieDeclarations]: Found specification of procedure reg_timer_1 [2023-11-23 20:32:24,588 INFO L138 BoogieDeclarations]: Found implementation of procedure reg_timer_1 [2023-11-23 20:32:24,588 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-23 20:32:24,588 INFO L130 BoogieDeclarations]: Found specification of procedure usb_control_msg [2023-11-23 20:32:24,588 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_control_msg [2023-11-23 20:32:24,588 INFO L130 BoogieDeclarations]: Found specification of procedure usb_free_urb [2023-11-23 20:32:24,589 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_free_urb [2023-11-23 20:32:24,589 INFO L130 BoogieDeclarations]: Found specification of procedure ctrl_start_transfer [2023-11-23 20:32:24,589 INFO L138 BoogieDeclarations]: Found implementation of procedure ctrl_start_transfer [2023-11-23 20:32:24,589 INFO L130 BoogieDeclarations]: Found specification of procedure queue_control_request [2023-11-23 20:32:24,589 INFO L138 BoogieDeclarations]: Found implementation of procedure queue_control_request [2023-11-23 20:32:24,590 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-23 20:32:24,590 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-23 20:32:24,590 INFO L130 BoogieDeclarations]: Found specification of procedure printk [2023-11-23 20:32:24,590 INFO L138 BoogieDeclarations]: Found implementation of procedure printk [2023-11-23 20:32:24,590 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~TO~VOID [2023-11-23 20:32:24,591 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~TO~VOID [2023-11-23 20:32:24,591 INFO L130 BoogieDeclarations]: Found specification of procedure fill_isoc_urb [2023-11-23 20:32:24,591 INFO L138 BoogieDeclarations]: Found implementation of procedure fill_isoc_urb [2023-11-23 20:32:24,591 INFO L130 BoogieDeclarations]: Found specification of procedure usb_set_intfdata [2023-11-23 20:32:24,591 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_set_intfdata [2023-11-23 20:32:24,592 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-23 20:32:24,592 INFO L130 BoogieDeclarations]: Found specification of procedure usb_alloc_urb [2023-11-23 20:32:24,592 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_alloc_urb [2023-11-23 20:32:24,592 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2023-11-23 20:32:24,592 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2023-11-23 20:32:24,593 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2023-11-23 20:32:24,593 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 20:32:24,593 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 20:32:25,057 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 20:32:25,059 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 20:32:25,533 INFO L775 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2023-11-23 20:32:30,471 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 20:32:31,307 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 20:32:31,308 INFO L309 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-23 20:32:31,311 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:32:31 BoogieIcfgContainer [2023-11-23 20:32:31,311 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 20:32:31,316 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 20:32:31,316 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 20:32:31,320 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 20:32:31,320 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 08:32:21" (1/3) ... [2023-11-23 20:32:31,322 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60dee9ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:32:31, skipping insertion in model container [2023-11-23 20:32:31,322 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:32:23" (2/3) ... [2023-11-23 20:32:31,323 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60dee9ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:32:31, skipping insertion in model container [2023-11-23 20:32:31,323 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:32:31" (3/3) ... [2023-11-23 20:32:31,325 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 [2023-11-23 20:32:31,347 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 20:32:31,347 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-23 20:32:31,433 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 20:32:31,441 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;@7caf459, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 20:32:31,441 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-23 20:32:31,451 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) [2023-11-23 20:32:31,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-11-23 20:32:31,468 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:32:31,469 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] [2023-11-23 20:32:31,471 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:32:31,479 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:32:31,480 INFO L85 PathProgramCache]: Analyzing trace with hash 1146399351, now seen corresponding path program 1 times [2023-11-23 20:32:31,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:32:31,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512488414] [2023-11-23 20:32:31,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:32:31,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:32:31,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:32:32,193 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:32:32,194 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:32:32,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512488414] [2023-11-23 20:32:32,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512488414] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:32:32,196 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:32:32,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 20:32:32,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946432705] [2023-11-23 20:32:32,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:32:32,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 20:32:32,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:32:32,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 20:32:32,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 20:32:32,239 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) [2023-11-23 20:32:34,873 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 [] [2023-11-23 20:32:36,882 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-23 20:32:38,111 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-23 20:32:38,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:32:38,819 INFO L93 Difference]: Finished difference Result 914 states and 1328 transitions. [2023-11-23 20:32:38,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 20:32:38,824 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 [2023-11-23 20:32:38,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:32:38,843 INFO L225 Difference]: With dead ends: 914 [2023-11-23 20:32:38,844 INFO L226 Difference]: Without dead ends: 465 [2023-11-23 20:32:38,853 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 20:32:38,862 INFO L413 NwaCegarLoop]: 543 mSDtfsCounter, 52 mSDsluCounter, 535 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 4 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.4s 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, 6.5s IncrementalHoareTripleChecker+Time [2023-11-23 20:32:38,863 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 1078 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 163 Invalid, 2 Unknown, 0 Unchecked, 6.5s Time] [2023-11-23 20:32:38,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2023-11-23 20:32:38,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 464. [2023-11-23 20:32:38,996 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) [2023-11-23 20:32:39,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 658 transitions. [2023-11-23 20:32:39,007 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 658 transitions. Word has length 29 [2023-11-23 20:32:39,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:32:39,008 INFO L495 AbstractCegarLoop]: Abstraction has 464 states and 658 transitions. [2023-11-23 20:32:39,010 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) [2023-11-23 20:32:39,013 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 658 transitions. [2023-11-23 20:32:39,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-11-23 20:32:39,021 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:32:39,021 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] [2023-11-23 20:32:39,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 20:32:39,022 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:32:39,024 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:32:39,025 INFO L85 PathProgramCache]: Analyzing trace with hash 560621103, now seen corresponding path program 1 times [2023-11-23 20:32:39,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:32:39,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220606396] [2023-11-23 20:32:39,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:32:39,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:32:39,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:32:39,540 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-23 20:32:39,540 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:32:39,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220606396] [2023-11-23 20:32:39,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220606396] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:32:39,546 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:32:39,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 20:32:39,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846155254] [2023-11-23 20:32:39,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:32:39,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 20:32:39,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:32:39,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 20:32:39,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 20:32:39,551 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) [2023-11-23 20:32:42,472 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-23 20:32:44,480 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-23 20:32:46,655 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-23 20:32:46,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:32:46,739 INFO L93 Difference]: Finished difference Result 924 states and 1314 transitions. [2023-11-23 20:32:46,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 20:32:46,745 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 [2023-11-23 20:32:46,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:32:46,751 INFO L225 Difference]: With dead ends: 924 [2023-11-23 20:32:46,752 INFO L226 Difference]: Without dead ends: 471 [2023-11-23 20:32:46,758 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 20:32:46,759 INFO L413 NwaCegarLoop]: 537 mSDtfsCounter, 2 mSDsluCounter, 528 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.0s 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, 7.1s IncrementalHoareTripleChecker+Time [2023-11-23 20:32:46,760 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 1065 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 161 Invalid, 2 Unknown, 0 Unchecked, 7.1s Time] [2023-11-23 20:32:46,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2023-11-23 20:32:46,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 469. [2023-11-23 20:32:46,822 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) [2023-11-23 20:32:46,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 665 transitions. [2023-11-23 20:32:46,828 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 665 transitions. Word has length 49 [2023-11-23 20:32:46,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:32:46,829 INFO L495 AbstractCegarLoop]: Abstraction has 469 states and 665 transitions. [2023-11-23 20:32:46,829 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) [2023-11-23 20:32:46,829 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 665 transitions. [2023-11-23 20:32:46,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-11-23 20:32:46,839 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:32:46,840 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] [2023-11-23 20:32:46,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-23 20:32:46,842 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:32:46,847 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:32:46,852 INFO L85 PathProgramCache]: Analyzing trace with hash 1344683960, now seen corresponding path program 1 times [2023-11-23 20:32:46,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:32:46,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936591519] [2023-11-23 20:32:46,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:32:46,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:32:46,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:32:47,240 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-23 20:32:47,240 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:32:47,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936591519] [2023-11-23 20:32:47,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936591519] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:32:47,241 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:32:47,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 20:32:47,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028345225] [2023-11-23 20:32:47,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:32:47,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 20:32:47,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:32:47,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 20:32:47,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 20:32:47,243 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) [2023-11-23 20:32:49,488 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.59s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-23 20:32:51,497 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 [] [2023-11-23 20:32:52,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:32:52,761 INFO L93 Difference]: Finished difference Result 943 states and 1342 transitions. [2023-11-23 20:32:52,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 20:32:52,762 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 [2023-11-23 20:32:52,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:32:52,767 INFO L225 Difference]: With dead ends: 943 [2023-11-23 20:32:52,767 INFO L226 Difference]: Without dead ends: 485 [2023-11-23 20:32:52,770 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 20:32:52,771 INFO L413 NwaCegarLoop]: 533 mSDtfsCounter, 15 mSDsluCounter, 529 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 1062 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2023-11-23 20:32:52,771 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 1062 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 161 Invalid, 1 Unknown, 0 Unchecked, 5.5s Time] [2023-11-23 20:32:52,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2023-11-23 20:32:52,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 474. [2023-11-23 20:32:52,796 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) [2023-11-23 20:32:52,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 474 states to 474 states and 672 transitions. [2023-11-23 20:32:52,801 INFO L78 Accepts]: Start accepts. Automaton has 474 states and 672 transitions. Word has length 51 [2023-11-23 20:32:52,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:32:52,802 INFO L495 AbstractCegarLoop]: Abstraction has 474 states and 672 transitions. [2023-11-23 20:32:52,802 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) [2023-11-23 20:32:52,802 INFO L276 IsEmpty]: Start isEmpty. Operand 474 states and 672 transitions. [2023-11-23 20:32:52,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-11-23 20:32:52,804 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:32:52,804 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] [2023-11-23 20:32:52,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-23 20:32:52,805 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:32:52,805 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:32:52,805 INFO L85 PathProgramCache]: Analyzing trace with hash 1282061120, now seen corresponding path program 1 times [2023-11-23 20:32:52,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:32:52,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236618385] [2023-11-23 20:32:52,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:32:52,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:32:53,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:32:53,456 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-23 20:32:53,457 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:32:53,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236618385] [2023-11-23 20:32:53,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236618385] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:32:53,457 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:32:53,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 20:32:53,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060245178] [2023-11-23 20:32:53,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:32:53,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 20:32:53,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:32:53,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 20:32:53,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 20:32:53,460 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) [2023-11-23 20:32:55,900 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 [] [2023-11-23 20:32:57,146 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-23 20:32:57,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:32:57,300 INFO L93 Difference]: Finished difference Result 1048 states and 1480 transitions. [2023-11-23 20:32:57,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 20:32:57,301 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 [2023-11-23 20:32:57,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:32:57,306 INFO L225 Difference]: With dead ends: 1048 [2023-11-23 20:32:57,306 INFO L226 Difference]: Without dead ends: 585 [2023-11-23 20:32:57,309 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 20:32:57,310 INFO L413 NwaCegarLoop]: 654 mSDtfsCounter, 500 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 4 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s 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, 3.8s IncrementalHoareTripleChecker+Time [2023-11-23 20:32:57,310 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [500 Valid, 870 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 130 Invalid, 1 Unknown, 0 Unchecked, 3.8s Time] [2023-11-23 20:32:57,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states. [2023-11-23 20:32:57,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 581. [2023-11-23 20:32:57,344 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) [2023-11-23 20:32:57,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 581 states to 581 states and 814 transitions. [2023-11-23 20:32:57,350 INFO L78 Accepts]: Start accepts. Automaton has 581 states and 814 transitions. Word has length 59 [2023-11-23 20:32:57,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:32:57,350 INFO L495 AbstractCegarLoop]: Abstraction has 581 states and 814 transitions. [2023-11-23 20:32:57,351 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) [2023-11-23 20:32:57,351 INFO L276 IsEmpty]: Start isEmpty. Operand 581 states and 814 transitions. [2023-11-23 20:32:57,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-11-23 20:32:57,352 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:32:57,353 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] [2023-11-23 20:32:57,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-23 20:32:57,353 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:32:57,354 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:32:57,354 INFO L85 PathProgramCache]: Analyzing trace with hash -274688803, now seen corresponding path program 1 times [2023-11-23 20:32:57,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:32:57,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383611268] [2023-11-23 20:32:57,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:32:57,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:32:57,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:32:57,770 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-23 20:32:57,770 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:32:57,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383611268] [2023-11-23 20:32:57,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383611268] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:32:57,771 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:32:57,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 20:32:57,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190335762] [2023-11-23 20:32:57,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:32:57,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 20:32:57,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:32:57,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 20:32:57,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 20:32:57,773 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) [2023-11-23 20:33:01,073 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 [] [2023-11-23 20:33:03,303 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.62s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-23 20:33:05,390 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-23 20:33:07,401 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 [] [2023-11-23 20:33:07,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:33:07,449 INFO L93 Difference]: Finished difference Result 1286 states and 1827 transitions. [2023-11-23 20:33:07,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 20:33:07,450 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 [2023-11-23 20:33:07,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:33:07,457 INFO L225 Difference]: With dead ends: 1286 [2023-11-23 20:33:07,458 INFO L226 Difference]: Without dead ends: 716 [2023-11-23 20:33:07,461 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 20:33:07,462 INFO L413 NwaCegarLoop]: 534 mSDtfsCounter, 105 mSDsluCounter, 528 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 3 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.5s 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, 9.6s IncrementalHoareTripleChecker+Time [2023-11-23 20:33:07,462 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [158 Valid, 1062 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 164 Invalid, 3 Unknown, 0 Unchecked, 9.6s Time] [2023-11-23 20:33:07,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 716 states. [2023-11-23 20:33:07,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 716 to 582. [2023-11-23 20:33:07,510 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) [2023-11-23 20:33:07,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 582 states to 582 states and 815 transitions. [2023-11-23 20:33:07,517 INFO L78 Accepts]: Start accepts. Automaton has 582 states and 815 transitions. Word has length 68 [2023-11-23 20:33:07,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:33:07,518 INFO L495 AbstractCegarLoop]: Abstraction has 582 states and 815 transitions. [2023-11-23 20:33:07,518 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) [2023-11-23 20:33:07,518 INFO L276 IsEmpty]: Start isEmpty. Operand 582 states and 815 transitions. [2023-11-23 20:33:07,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-11-23 20:33:07,520 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:33:07,521 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] [2023-11-23 20:33:07,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-23 20:33:07,521 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:33:07,522 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:33:07,522 INFO L85 PathProgramCache]: Analyzing trace with hash 1304789797, now seen corresponding path program 1 times [2023-11-23 20:33:07,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:33:07,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655271737] [2023-11-23 20:33:07,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:33:07,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:33:07,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:33:07,912 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-23 20:33:07,913 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:33:07,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655271737] [2023-11-23 20:33:07,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655271737] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 20:33:07,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635117977] [2023-11-23 20:33:07,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:33:07,914 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:33:07,914 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_355cf634-7d67-4fbd-825a-05ee26ac5a38/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:33:07,921 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_355cf634-7d67-4fbd-825a-05ee26ac5a38/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:33:07,964 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_355cf634-7d67-4fbd-825a-05ee26ac5a38/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 20:33:08,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:33:08,710 INFO L262 TraceCheckSpWp]: Trace formula consists of 2333 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-23 20:33:08,722 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:33:08,789 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-23 20:33:08,789 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 20:33:08,838 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-23 20:33:08,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [635117977] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 20:33:08,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1885708423] [2023-11-23 20:33:08,879 INFO L159 IcfgInterpreter]: Started Sifa with 54 locations of interest [2023-11-23 20:33:08,879 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 20:33:08,884 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 20:33:08,890 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 20:33:08,890 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs