./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--hardware--mISDN--hfcsusb.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1411fee1-c6a9-4394-b9af-344a76ab7040/bin/utaipan-verify-t7M7D8N6sZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1411fee1-c6a9-4394-b9af-344a76ab7040/bin/utaipan-verify-t7M7D8N6sZ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1411fee1-c6a9-4394-b9af-344a76ab7040/bin/utaipan-verify-t7M7D8N6sZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1411fee1-c6a9-4394-b9af-344a76ab7040/bin/utaipan-verify-t7M7D8N6sZ/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--isdn--hardware--mISDN--hfcsusb.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1411fee1-c6a9-4394-b9af-344a76ab7040/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1411fee1-c6a9-4394-b9af-344a76ab7040/bin/utaipan-verify-t7M7D8N6sZ --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash dac564b3c3a3d92c70c6b64cab263655f73325d953da5e99709a7250df803cc8 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 05:20:01,215 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 05:20:01,370 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1411fee1-c6a9-4394-b9af-344a76ab7040/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-64bit-Taipan_Default.epf [2023-11-19 05:20:01,376 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 05:20:01,380 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 05:20:01,430 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 05:20:01,431 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 05:20:01,432 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 05:20:01,434 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 05:20:01,441 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 05:20:01,442 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-19 05:20:01,443 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-19 05:20:01,443 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-19 05:20:01,446 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-19 05:20:01,447 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-19 05:20:01,447 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-19 05:20:01,448 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-19 05:20:01,449 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-19 05:20:01,449 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-19 05:20:01,450 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-19 05:20:01,451 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-19 05:20:01,452 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-19 05:20:01,453 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 05:20:01,454 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 05:20:01,455 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 05:20:01,456 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 05:20:01,456 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 05:20:01,457 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 05:20:01,457 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 05:20:01,458 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 05:20:01,460 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 05:20:01,460 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 05:20:01,461 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 05:20:01,461 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 05:20:01,462 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 05:20:01,462 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 05:20:01,462 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 05:20:01,463 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-19 05:20:01,463 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 05:20:01,464 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 05:20:01,464 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-19 05:20:01,465 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 05:20:01,465 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_1411fee1-c6a9-4394-b9af-344a76ab7040/bin/utaipan-verify-t7M7D8N6sZ/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1411fee1-c6a9-4394-b9af-344a76ab7040/bin/utaipan-verify-t7M7D8N6sZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dac564b3c3a3d92c70c6b64cab263655f73325d953da5e99709a7250df803cc8 [2023-11-19 05:20:01,843 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 05:20:01,895 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 05:20:01,899 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 05:20:01,901 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 05:20:01,901 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 05:20:01,904 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1411fee1-c6a9-4394-b9af-344a76ab7040/bin/utaipan-verify-t7M7D8N6sZ/../../sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--isdn--hardware--mISDN--hfcsusb.ko-entry_point.cil.out.i [2023-11-19 05:20:05,943 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 05:20:06,938 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 05:20:06,941 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1411fee1-c6a9-4394-b9af-344a76ab7040/sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--isdn--hardware--mISDN--hfcsusb.ko-entry_point.cil.out.i [2023-11-19 05:20:06,996 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1411fee1-c6a9-4394-b9af-344a76ab7040/bin/utaipan-verify-t7M7D8N6sZ/data/f0f3e3c02/c8cf93e7877b41609a0e7125b299d44f/FLAGa3a45291a [2023-11-19 05:20:07,013 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1411fee1-c6a9-4394-b9af-344a76ab7040/bin/utaipan-verify-t7M7D8N6sZ/data/f0f3e3c02/c8cf93e7877b41609a0e7125b299d44f [2023-11-19 05:20:07,016 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 05:20:07,018 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 05:20:07,020 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 05:20:07,020 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 05:20:07,032 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 05:20:07,033 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:20:07" (1/1) ... [2023-11-19 05:20:07,034 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@33c9c3b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:20:07, skipping insertion in model container [2023-11-19 05:20:07,035 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:20:07" (1/1) ... [2023-11-19 05:20:07,230 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 05:20:08,048 WARN L1274 CHandler]: Detected problem Invalid redeclaration of the name show at C: (*show)(struct kobject___0 * , struct attribute___0 * , char * ) [6069] [2023-11-19 05:20:08,050 WARN L1274 CHandler]: Detected problem Invalid redeclaration of the name store at C: (*store)(struct kobject___0 * , struct attribute___0 * , char const * , size_t ) [6070-6071] [2023-11-19 05:20:08,377 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_1411fee1-c6a9-4394-b9af-344a76ab7040/sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--isdn--hardware--mISDN--hfcsusb.ko-entry_point.cil.out.i[181805,181818] [2023-11-19 05:20:09,566 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 05:20:09,671 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 05:20:09,817 WARN L1274 CHandler]: Detected problem Invalid redeclaration of the name show at C: (*show)(struct kobject___0 * , struct attribute___0 * , char * ) [6069] [2023-11-19 05:20:09,817 WARN L1274 CHandler]: Detected problem Invalid redeclaration of the name store at C: (*store)(struct kobject___0 * , struct attribute___0 * , char const * , size_t ) [6070-6071] [2023-11-19 05:20:09,820 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile (".pushsection .smp_locks,\"a\"\n.balign 4\n.long 671f - .\n.popsection\n671:\n\tlock; bts %1,%0": "+m" (*((long volatile *)addr)): "Ir" (nr): "memory"); [6154] [2023-11-19 05:20:09,822 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile (".pushsection .smp_locks,\"a\"\n.balign 4\n.long 671f - .\n.popsection\n671:\n\tlock; btr %1,%0": "+m" (*((long volatile *)addr)): "Ir" (nr)); [6161] [2023-11-19 05:20:09,822 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile (".pushsection .smp_locks,\"a\"\n.balign 4\n.long 671f - .\n.popsection\n671:\n\tlock; bts %2, %0; setc %1": "+m" (*addr), "=qm" (c): "Ir" (nr): "memory"); [6169-6170] [2023-11-19 05:20:09,823 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile (".pushsection .smp_locks,\"a\"\n.balign 4\n.long 671f - .\n.popsection\n671:\n\tlock; btr %2, %0; setc %1": "+m" (*addr), "=qm" (c): "Ir" (nr): "memory"); [6178-6179] [2023-11-19 05:20:09,830 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_1411fee1-c6a9-4394-b9af-344a76ab7040/sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--isdn--hardware--mISDN--hfcsusb.ko-entry_point.cil.out.i[181805,181818] [2023-11-19 05:20:10,137 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 05:20:10,241 INFO L206 MainTranslator]: Completed translation [2023-11-19 05:20:10,242 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:20:10 WrapperNode [2023-11-19 05:20:10,242 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 05:20:10,244 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 05:20:10,244 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 05:20:10,244 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 05:20:10,252 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:20:10" (1/1) ... [2023-11-19 05:20:10,377 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:20:10" (1/1) ... [2023-11-19 05:20:10,575 INFO L138 Inliner]: procedures = 202, calls = 2062, calls flagged for inlining = 83, calls inlined = 44, statements flattened = 2275 [2023-11-19 05:20:10,575 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 05:20:10,576 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 05:20:10,576 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 05:20:10,577 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 05:20:10,586 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:20:10" (1/1) ... [2023-11-19 05:20:10,587 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:20:10" (1/1) ... [2023-11-19 05:20:10,601 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:20:10" (1/1) ... [2023-11-19 05:20:10,602 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:20:10" (1/1) ... [2023-11-19 05:20:10,673 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:20:10" (1/1) ... [2023-11-19 05:20:10,687 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:20:10" (1/1) ... [2023-11-19 05:20:10,702 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:20:10" (1/1) ... [2023-11-19 05:20:10,717 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:20:10" (1/1) ... [2023-11-19 05:20:10,737 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 05:20:10,739 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 05:20:10,739 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 05:20:10,739 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 05:20:10,740 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:20:10" (1/1) ... [2023-11-19 05:20:10,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 05:20:10,760 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1411fee1-c6a9-4394-b9af-344a76ab7040/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:20:10,772 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1411fee1-c6a9-4394-b9af-344a76ab7040/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 05:20:10,816 INFO L130 BoogieDeclarations]: Found specification of procedure write_reg [2023-11-19 05:20:10,816 INFO L138 BoogieDeclarations]: Found implementation of procedure write_reg [2023-11-19 05:20:10,820 INFO L130 BoogieDeclarations]: Found specification of procedure usb_submit_urb [2023-11-19 05:20:10,820 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_submit_urb [2023-11-19 05:20:10,820 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2023-11-19 05:20:10,820 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2023-11-19 05:20:10,820 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2023-11-19 05:20:10,820 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2023-11-19 05:20:10,820 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_lock [2023-11-19 05:20:10,821 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_lock [2023-11-19 05:20:10,821 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2023-11-19 05:20:10,821 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2023-11-19 05:20:10,821 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2023-11-19 05:20:10,805 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1411fee1-c6a9-4394-b9af-344a76ab7040/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 05:20:10,822 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2023-11-19 05:20:10,823 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-19 05:20:10,823 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-19 05:20:10,823 INFO L130 BoogieDeclarations]: Found specification of procedure hfcsusb_probe [2023-11-19 05:20:10,823 INFO L138 BoogieDeclarations]: Found implementation of procedure hfcsusb_probe [2023-11-19 05:20:10,824 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2023-11-19 05:20:10,824 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2023-11-19 05:20:10,824 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 05:20:10,824 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-19 05:20:10,824 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock [2023-11-19 05:20:10,825 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock [2023-11-19 05:20:10,825 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2023-11-19 05:20:10,825 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2023-11-19 05:20:10,825 INFO L130 BoogieDeclarations]: Found specification of procedure ctrl_start_transfer [2023-11-19 05:20:10,825 INFO L138 BoogieDeclarations]: Found implementation of procedure ctrl_start_transfer [2023-11-19 05:20:10,825 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 05:20:10,826 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-19 05:20:10,826 INFO L130 BoogieDeclarations]: Found specification of procedure printk [2023-11-19 05:20:10,826 INFO L138 BoogieDeclarations]: Found implementation of procedure printk [2023-11-19 05:20:10,826 INFO L130 BoogieDeclarations]: Found specification of procedure kzalloc [2023-11-19 05:20:10,826 INFO L138 BoogieDeclarations]: Found implementation of procedure kzalloc [2023-11-19 05:20:10,826 INFO L130 BoogieDeclarations]: Found specification of procedure usb_set_intfdata [2023-11-19 05:20:10,827 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_set_intfdata [2023-11-19 05:20:10,827 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock [2023-11-19 05:20:10,827 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock [2023-11-19 05:20:10,827 INFO L130 BoogieDeclarations]: Found specification of procedure usb_alloc_urb [2023-11-19 05:20:10,827 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_alloc_urb [2023-11-19 05:20:10,827 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2023-11-19 05:20:10,828 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2023-11-19 05:20:10,828 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2023-11-19 05:20:10,828 INFO L130 BoogieDeclarations]: Found specification of procedure mISDN_freebchannel [2023-11-19 05:20:10,828 INFO L138 BoogieDeclarations]: Found implementation of procedure mISDN_freebchannel [2023-11-19 05:20:10,828 INFO L130 BoogieDeclarations]: Found specification of procedure mISDN_freedchannel [2023-11-19 05:20:10,828 INFO L138 BoogieDeclarations]: Found implementation of procedure mISDN_freedchannel [2023-11-19 05:20:10,829 INFO L130 BoogieDeclarations]: Found specification of procedure __raw_spin_lock_init [2023-11-19 05:20:10,829 INFO L138 BoogieDeclarations]: Found implementation of procedure __raw_spin_lock_init [2023-11-19 05:20:10,829 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2023-11-19 05:20:10,829 INFO L130 BoogieDeclarations]: Found specification of procedure handle_led [2023-11-19 05:20:10,829 INFO L138 BoogieDeclarations]: Found implementation of procedure handle_led [2023-11-19 05:20:10,829 INFO L130 BoogieDeclarations]: Found specification of procedure mISDN_initdchannel [2023-11-19 05:20:10,830 INFO L138 BoogieDeclarations]: Found implementation of procedure mISDN_initdchannel [2023-11-19 05:20:10,830 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 05:20:10,830 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2023-11-19 05:20:10,830 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2023-11-19 05:20:10,830 INFO L130 BoogieDeclarations]: Found specification of procedure stop_iso_gracefull [2023-11-19 05:20:10,830 INFO L138 BoogieDeclarations]: Found implementation of procedure stop_iso_gracefull [2023-11-19 05:20:10,831 INFO L130 BoogieDeclarations]: Found specification of procedure __create_pipe [2023-11-19 05:20:10,831 INFO L138 BoogieDeclarations]: Found implementation of procedure __create_pipe [2023-11-19 05:20:10,831 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_alloc_flags [2023-11-19 05:20:10,831 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_alloc_flags [2023-11-19 05:20:10,831 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2023-11-19 05:20:10,831 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2023-11-19 05:20:10,832 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 05:20:10,832 INFO L130 BoogieDeclarations]: Found specification of procedure schedule_timeout_interruptible [2023-11-19 05:20:10,832 INFO L138 BoogieDeclarations]: Found implementation of procedure schedule_timeout_interruptible [2023-11-19 05:20:10,832 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-19 05:20:10,832 INFO L130 BoogieDeclarations]: Found specification of procedure __list_add [2023-11-19 05:20:10,832 INFO L138 BoogieDeclarations]: Found implementation of procedure __list_add [2023-11-19 05:20:10,833 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 05:20:10,833 INFO L130 BoogieDeclarations]: Found specification of procedure set_led_bit [2023-11-19 05:20:10,833 INFO L138 BoogieDeclarations]: Found implementation of procedure set_led_bit [2023-11-19 05:20:10,833 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-19 05:20:10,833 INFO L130 BoogieDeclarations]: Found specification of procedure l1_event [2023-11-19 05:20:10,833 INFO L138 BoogieDeclarations]: Found implementation of procedure l1_event [2023-11-19 05:20:10,833 INFO L130 BoogieDeclarations]: Found specification of procedure hfcsusb_stop_endpoint [2023-11-19 05:20:10,834 INFO L138 BoogieDeclarations]: Found implementation of procedure hfcsusb_stop_endpoint [2023-11-19 05:20:10,834 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock [2023-11-19 05:20:10,834 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock [2023-11-19 05:20:10,834 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 05:20:10,834 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 05:20:10,834 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 05:20:11,223 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 05:20:11,228 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 05:20:11,601 INFO L767 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2023-11-19 05:20:16,978 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 05:20:18,009 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 05:20:18,009 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-19 05:20:18,019 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:20:18 BoogieIcfgContainer [2023-11-19 05:20:18,019 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 05:20:18,022 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 05:20:18,022 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 05:20:18,067 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 05:20:18,067 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 05:20:07" (1/3) ... [2023-11-19 05:20:18,068 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7dd8014f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:20:18, skipping insertion in model container [2023-11-19 05:20:18,069 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:20:10" (2/3) ... [2023-11-19 05:20:18,069 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7dd8014f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:20:18, skipping insertion in model container [2023-11-19 05:20:18,069 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:20:18" (3/3) ... [2023-11-19 05:20:18,072 INFO L112 eAbstractionObserver]: Analyzing ICFG 43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--isdn--hardware--mISDN--hfcsusb.ko-entry_point.cil.out.i [2023-11-19 05:20:18,094 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 05:20:18,094 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 05:20:18,179 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 05:20:18,189 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;@f20316a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-19 05:20:18,190 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-19 05:20:18,198 INFO L276 IsEmpty]: Start isEmpty. Operand has 410 states, 261 states have (on average 1.3486590038314177) internal successors, (352), 270 states have internal predecessors, (352), 114 states have call successors, (114), 34 states have call predecessors, (114), 33 states have return successors, (111), 111 states have call predecessors, (111), 111 states have call successors, (111) [2023-11-19 05:20:18,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-11-19 05:20:18,215 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:20:18,216 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:20:18,217 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:20:18,224 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:20:18,224 INFO L85 PathProgramCache]: Analyzing trace with hash 965603102, now seen corresponding path program 1 times [2023-11-19 05:20:18,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:20:18,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811800130] [2023-11-19 05:20:18,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:20:18,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:20:18,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:20:19,138 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:20:19,138 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:20:19,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811800130] [2023-11-19 05:20:19,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811800130] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:20:19,140 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:20:19,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 05:20:19,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014474916] [2023-11-19 05:20:19,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:20:19,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:20:19,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:20:19,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:20:19,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:20:19,217 INFO L87 Difference]: Start difference. First operand has 410 states, 261 states have (on average 1.3486590038314177) internal successors, (352), 270 states have internal predecessors, (352), 114 states have call successors, (114), 34 states have call predecessors, (114), 33 states have return successors, (111), 111 states have call predecessors, (111), 111 states have call successors, (111) 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, (6), 2 states have call predecessors, (6), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-19 05:20:22,330 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-19 05:20:24,339 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-19 05:20:24,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:20:24,389 INFO L93 Difference]: Finished difference Result 842 states and 1207 transitions. [2023-11-19 05:20:24,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:20:24,392 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, (6), 2 states have call predecessors, (6), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 31 [2023-11-19 05:20:24,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:20:24,413 INFO L225 Difference]: With dead ends: 842 [2023-11-19 05:20:24,413 INFO L226 Difference]: Without dead ends: 424 [2023-11-19 05:20:24,421 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:20:24,425 INFO L413 NwaCegarLoop]: 491 mSDtfsCounter, 32 mSDsluCounter, 484 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 4 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 975 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2023-11-19 05:20:24,426 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 975 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 167 Invalid, 2 Unknown, 0 Unchecked, 5.0s Time] [2023-11-19 05:20:24,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2023-11-19 05:20:24,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 424. [2023-11-19 05:20:24,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 424 states, 277 states have (on average 1.332129963898917) internal successors, (369), 281 states have internal predecessors, (369), 112 states have call successors, (112), 35 states have call predecessors, (112), 34 states have return successors, (111), 111 states have call predecessors, (111), 111 states have call successors, (111) [2023-11-19 05:20:24,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 592 transitions. [2023-11-19 05:20:24,519 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 592 transitions. Word has length 31 [2023-11-19 05:20:24,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:20:24,520 INFO L495 AbstractCegarLoop]: Abstraction has 424 states and 592 transitions. [2023-11-19 05:20:24,520 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, (6), 2 states have call predecessors, (6), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-19 05:20:24,521 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 592 transitions. [2023-11-19 05:20:24,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-11-19 05:20:24,524 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:20:24,524 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:20:24,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 05:20:24,525 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:20:24,526 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:20:24,526 INFO L85 PathProgramCache]: Analyzing trace with hash -817766778, now seen corresponding path program 1 times [2023-11-19 05:20:24,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:20:24,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222608213] [2023-11-19 05:20:24,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:20:24,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:20:24,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:20:24,936 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-19 05:20:24,936 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:20:24,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222608213] [2023-11-19 05:20:24,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222608213] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:20:24,942 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:20:24,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 05:20:24,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657599816] [2023-11-19 05:20:24,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:20:24,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:20:24,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:20:24,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:20:24,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:20:24,948 INFO L87 Difference]: Start difference. First operand 424 states and 592 transitions. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-19 05:20:27,844 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-19 05:20:29,851 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-19 05:20:29,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:20:29,912 INFO L93 Difference]: Finished difference Result 844 states and 1183 transitions. [2023-11-19 05:20:29,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:20:29,914 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 45 [2023-11-19 05:20:29,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:20:29,919 INFO L225 Difference]: With dead ends: 844 [2023-11-19 05:20:29,919 INFO L226 Difference]: Without dead ends: 431 [2023-11-19 05:20:29,921 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:20:29,923 INFO L413 NwaCegarLoop]: 488 mSDtfsCounter, 2 mSDsluCounter, 479 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 967 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2023-11-19 05:20:29,923 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 967 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 163 Invalid, 2 Unknown, 0 Unchecked, 4.9s Time] [2023-11-19 05:20:29,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2023-11-19 05:20:29,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 429. [2023-11-19 05:20:29,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 429 states, 281 states have (on average 1.3309608540925266) internal successors, (374), 285 states have internal predecessors, (374), 113 states have call successors, (113), 35 states have call predecessors, (113), 34 states have return successors, (112), 112 states have call predecessors, (112), 112 states have call successors, (112) [2023-11-19 05:20:29,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 599 transitions. [2023-11-19 05:20:29,988 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 599 transitions. Word has length 45 [2023-11-19 05:20:29,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:20:29,990 INFO L495 AbstractCegarLoop]: Abstraction has 429 states and 599 transitions. [2023-11-19 05:20:29,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-19 05:20:29,990 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 599 transitions. [2023-11-19 05:20:29,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-11-19 05:20:29,997 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:20:29,997 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] [2023-11-19 05:20:29,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 05:20:29,998 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:20:29,998 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:20:29,999 INFO L85 PathProgramCache]: Analyzing trace with hash -400307930, now seen corresponding path program 1 times [2023-11-19 05:20:29,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:20:30,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212884411] [2023-11-19 05:20:30,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:20:30,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:20:30,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:20:30,412 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-19 05:20:30,412 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:20:30,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212884411] [2023-11-19 05:20:30,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212884411] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:20:30,415 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:20:30,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 05:20:30,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583311623] [2023-11-19 05:20:30,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:20:30,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:20:30,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:20:30,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:20:30,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:20:30,418 INFO L87 Difference]: Start difference. First operand 429 states and 599 transitions. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-19 05:20:33,190 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-19 05:20:35,200 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-19 05:20:35,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:20:35,253 INFO L93 Difference]: Finished difference Result 863 states and 1211 transitions. [2023-11-19 05:20:35,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:20:35,255 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 47 [2023-11-19 05:20:35,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:20:35,259 INFO L225 Difference]: With dead ends: 863 [2023-11-19 05:20:35,259 INFO L226 Difference]: Without dead ends: 445 [2023-11-19 05:20:35,262 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:20:35,263 INFO L413 NwaCegarLoop]: 483 mSDtfsCounter, 15 mSDsluCounter, 479 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 962 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2023-11-19 05:20:35,264 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 962 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 164 Invalid, 2 Unknown, 0 Unchecked, 4.8s Time] [2023-11-19 05:20:35,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 445 states. [2023-11-19 05:20:35,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 445 to 434. [2023-11-19 05:20:35,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 434 states, 286 states have (on average 1.332167832167832) internal successors, (381), 290 states have internal predecessors, (381), 113 states have call successors, (113), 35 states have call predecessors, (113), 34 states have return successors, (112), 112 states have call predecessors, (112), 112 states have call successors, (112) [2023-11-19 05:20:35,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 606 transitions. [2023-11-19 05:20:35,293 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 606 transitions. Word has length 47 [2023-11-19 05:20:35,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:20:35,294 INFO L495 AbstractCegarLoop]: Abstraction has 434 states and 606 transitions. [2023-11-19 05:20:35,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-19 05:20:35,294 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 606 transitions. [2023-11-19 05:20:35,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-11-19 05:20:35,299 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:20:35,299 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:20:35,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 05:20:35,300 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:20:35,300 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:20:35,300 INFO L85 PathProgramCache]: Analyzing trace with hash -1647547407, now seen corresponding path program 1 times [2023-11-19 05:20:35,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:20:35,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33429858] [2023-11-19 05:20:35,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:20:35,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:20:35,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:20:35,731 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-19 05:20:35,731 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:20:35,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33429858] [2023-11-19 05:20:35,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33429858] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:20:35,732 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:20:35,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 05:20:35,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137859612] [2023-11-19 05:20:35,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:20:35,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:20:35,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:20:35,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:20:35,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:20:35,735 INFO L87 Difference]: Start difference. First operand 434 states and 606 transitions. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-19 05:20:38,716 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 [] [2023-11-19 05:20:40,891 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-19 05:20:42,899 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-19 05:20:43,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:20:43,025 INFO L93 Difference]: Finished difference Result 979 states and 1392 transitions. [2023-11-19 05:20:43,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:20:43,026 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 64 [2023-11-19 05:20:43,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:20:43,032 INFO L225 Difference]: With dead ends: 979 [2023-11-19 05:20:43,032 INFO L226 Difference]: Without dead ends: 556 [2023-11-19 05:20:43,035 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:20:43,036 INFO L413 NwaCegarLoop]: 489 mSDtfsCounter, 97 mSDsluCounter, 480 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 3 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 969 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.2s IncrementalHoareTripleChecker+Time [2023-11-19 05:20:43,036 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 969 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 169 Invalid, 3 Unknown, 0 Unchecked, 7.2s Time] [2023-11-19 05:20:43,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 556 states. [2023-11-19 05:20:43,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 556 to 435. [2023-11-19 05:20:43,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 435 states, 287 states have (on average 1.3310104529616724) internal successors, (382), 291 states have internal predecessors, (382), 113 states have call successors, (113), 35 states have call predecessors, (113), 34 states have return successors, (112), 112 states have call predecessors, (112), 112 states have call successors, (112) [2023-11-19 05:20:43,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 435 states to 435 states and 607 transitions. [2023-11-19 05:20:43,067 INFO L78 Accepts]: Start accepts. Automaton has 435 states and 607 transitions. Word has length 64 [2023-11-19 05:20:43,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:20:43,068 INFO L495 AbstractCegarLoop]: Abstraction has 435 states and 607 transitions. [2023-11-19 05:20:43,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-19 05:20:43,068 INFO L276 IsEmpty]: Start isEmpty. Operand 435 states and 607 transitions. [2023-11-19 05:20:43,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-11-19 05:20:43,072 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:20:43,072 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:20:43,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-19 05:20:43,073 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:20:43,073 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:20:43,073 INFO L85 PathProgramCache]: Analyzing trace with hash 1301144280, now seen corresponding path program 1 times [2023-11-19 05:20:43,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:20:43,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190258482] [2023-11-19 05:20:43,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:20:43,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:20:43,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:20:43,568 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-19 05:20:43,568 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:20:43,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190258482] [2023-11-19 05:20:43,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190258482] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:20:43,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060550899] [2023-11-19 05:20:43,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:20:43,569 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:20:43,570 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1411fee1-c6a9-4394-b9af-344a76ab7040/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:20:43,575 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1411fee1-c6a9-4394-b9af-344a76ab7040/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:20:43,617 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1411fee1-c6a9-4394-b9af-344a76ab7040/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 05:20:44,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:20:44,321 INFO L262 TraceCheckSpWp]: Trace formula consists of 2828 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 05:20:44,333 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:20:44,416 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-19 05:20:44,416 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 05:20:44,480 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-19 05:20:44,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2060550899] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 05:20:44,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [174695976] [2023-11-19 05:20:44,509 INFO L159 IcfgInterpreter]: Started Sifa with 53 locations of interest [2023-11-19 05:20:44,509 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 05:20:44,513 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 05:20:44,518 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 05:20:44,519 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs