./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ddv-machzwd/ddv_machzwd_outb.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff 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_1cadc6e3-28d2-4c67-8c0d-93fe4a6c5da7/bin/utaipan-verify-t7M7D8N6sZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cadc6e3-28d2-4c67-8c0d-93fe4a6c5da7/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_1cadc6e3-28d2-4c67-8c0d-93fe4a6c5da7/bin/utaipan-verify-t7M7D8N6sZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cadc6e3-28d2-4c67-8c0d-93fe4a6c5da7/bin/utaipan-verify-t7M7D8N6sZ/config/TaipanReach.xml -i ../../sv-benchmarks/c/ddv-machzwd/ddv_machzwd_outb.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cadc6e3-28d2-4c67-8c0d-93fe4a6c5da7/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cadc6e3-28d2-4c67-8c0d-93fe4a6c5da7/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 32bit --witnessprinter.graph.data.programhash b9ba053a0d2bb5cff65ef20f502acdb8ce89a9e82653cf0711701cf2b8f86a02 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 05:10:48,214 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 05:10:48,338 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cadc6e3-28d2-4c67-8c0d-93fe4a6c5da7/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-19 05:10:48,348 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 05:10:48,349 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 05:10:48,436 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 05:10:48,437 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 05:10:48,438 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 05:10:48,439 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 05:10:48,445 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 05:10:48,445 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-19 05:10:48,446 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-19 05:10:48,446 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-19 05:10:48,447 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-19 05:10:48,448 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-19 05:10:48,448 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-19 05:10:48,449 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-19 05:10:48,449 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-19 05:10:48,449 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-19 05:10:48,450 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-19 05:10:48,450 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-19 05:10:48,451 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-19 05:10:48,460 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 05:10:48,460 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 05:10:48,461 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 05:10:48,461 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 05:10:48,462 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 05:10:48,462 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 05:10:48,463 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 05:10:48,463 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 05:10:48,464 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 05:10:48,465 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 05:10:48,465 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 05:10:48,465 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 05:10:48,466 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 05:10:48,466 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 05:10:48,466 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 05:10:48,467 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 05:10:48,467 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 05:10:48,467 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 05:10:48,468 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-19 05:10:48,468 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 05:10:48,468 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 05:10:48,469 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-19 05:10:48,469 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 05:10:48,469 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_1cadc6e3-28d2-4c67-8c0d-93fe4a6c5da7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cadc6e3-28d2-4c67-8c0d-93fe4a6c5da7/bin/utaipan-verify-t7M7D8N6sZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b9ba053a0d2bb5cff65ef20f502acdb8ce89a9e82653cf0711701cf2b8f86a02 [2023-11-19 05:10:48,859 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 05:10:48,907 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 05:10:48,911 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 05:10:48,912 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 05:10:48,914 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 05:10:48,917 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cadc6e3-28d2-4c67-8c0d-93fe4a6c5da7/bin/utaipan-verify-t7M7D8N6sZ/../../sv-benchmarks/c/ddv-machzwd/ddv_machzwd_outb.i [2023-11-19 05:10:52,057 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 05:10:52,590 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 05:10:52,591 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cadc6e3-28d2-4c67-8c0d-93fe4a6c5da7/sv-benchmarks/c/ddv-machzwd/ddv_machzwd_outb.i [2023-11-19 05:10:52,628 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cadc6e3-28d2-4c67-8c0d-93fe4a6c5da7/bin/utaipan-verify-t7M7D8N6sZ/data/d423d6aea/7b6d582293c341a4857fc49700990c6f/FLAGa78b6b3ff [2023-11-19 05:10:52,646 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cadc6e3-28d2-4c67-8c0d-93fe4a6c5da7/bin/utaipan-verify-t7M7D8N6sZ/data/d423d6aea/7b6d582293c341a4857fc49700990c6f [2023-11-19 05:10:52,651 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 05:10:52,653 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 05:10:52,655 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 05:10:52,656 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 05:10:52,661 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 05:10:52,661 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:10:52" (1/1) ... [2023-11-19 05:10:52,662 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7a4c264c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:10:52, skipping insertion in model container [2023-11-19 05:10:52,663 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:10:52" (1/1) ... [2023-11-19 05:10:52,757 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 05:10:53,018 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_1cadc6e3-28d2-4c67-8c0d-93fe4a6c5da7/sv-benchmarks/c/ddv-machzwd/ddv_machzwd_outb.i[453,466] [2023-11-19 05:10:54,266 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 05:10:54,339 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 05:10:54,358 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_1cadc6e3-28d2-4c67-8c0d-93fe4a6c5da7/sv-benchmarks/c/ddv-machzwd/ddv_machzwd_outb.i[453,466] [2023-11-19 05:10:54,689 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 05:10:54,950 WARN L675 CHandler]: The function __VERIFIER_nondet_sector_t is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 05:10:54,960 INFO L206 MainTranslator]: Completed translation [2023-11-19 05:10:54,961 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:10:54 WrapperNode [2023-11-19 05:10:54,961 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 05:10:54,963 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 05:10:54,963 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 05:10:54,963 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 05:10:54,974 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:10:54" (1/1) ... [2023-11-19 05:10:55,062 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:10:54" (1/1) ... [2023-11-19 05:10:55,199 INFO L138 Inliner]: procedures = 474, calls = 839, calls flagged for inlining = 54, calls inlined = 38, statements flattened = 1091 [2023-11-19 05:10:55,201 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 05:10:55,202 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 05:10:55,202 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 05:10:55,202 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 05:10:55,215 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:10:54" (1/1) ... [2023-11-19 05:10:55,215 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:10:54" (1/1) ... [2023-11-19 05:10:55,242 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:10:54" (1/1) ... [2023-11-19 05:10:55,243 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:10:54" (1/1) ... [2023-11-19 05:10:55,336 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:10:54" (1/1) ... [2023-11-19 05:10:55,346 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:10:54" (1/1) ... [2023-11-19 05:10:55,369 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:10:54" (1/1) ... [2023-11-19 05:10:55,379 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:10:54" (1/1) ... [2023-11-19 05:10:55,396 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 05:10:55,398 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 05:10:55,398 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 05:10:55,398 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 05:10:55,399 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:10:54" (1/1) ... [2023-11-19 05:10:55,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 05:10:55,432 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cadc6e3-28d2-4c67-8c0d-93fe4a6c5da7/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:10:55,447 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cadc6e3-28d2-4c67-8c0d-93fe4a6c5da7/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 05:10:55,487 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cadc6e3-28d2-4c67-8c0d-93fe4a6c5da7/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 05:10:55,504 INFO L130 BoogieDeclarations]: Found specification of procedure zf_timer_off [2023-11-19 05:10:55,505 INFO L138 BoogieDeclarations]: Found implementation of procedure zf_timer_off [2023-11-19 05:10:55,505 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-19 05:10:55,505 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_atomic_begin [2023-11-19 05:10:55,506 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2023-11-19 05:10:55,508 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2023-11-19 05:10:55,509 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 05:10:55,509 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock [2023-11-19 05:10:55,509 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock [2023-11-19 05:10:55,510 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-19 05:10:55,510 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_atomic_end [2023-11-19 05:10:55,510 INFO L130 BoogieDeclarations]: Found specification of procedure zf_get_control [2023-11-19 05:10:55,510 INFO L138 BoogieDeclarations]: Found implementation of procedure zf_get_control [2023-11-19 05:10:55,511 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2023-11-19 05:10:55,511 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 05:10:55,511 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-19 05:10:55,512 INFO L130 BoogieDeclarations]: Found specification of procedure request_region [2023-11-19 05:10:55,512 INFO L138 BoogieDeclarations]: Found implementation of procedure request_region [2023-11-19 05:10:55,513 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 05:10:55,514 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-19 05:10:55,514 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2023-11-19 05:10:55,514 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2023-11-19 05:10:55,514 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock_irqsave [2023-11-19 05:10:55,516 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock_irqsave [2023-11-19 05:10:55,516 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~TO~VOID [2023-11-19 05:10:55,516 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~TO~VOID [2023-11-19 05:10:55,517 INFO L130 BoogieDeclarations]: Found specification of procedure release_region [2023-11-19 05:10:55,518 INFO L138 BoogieDeclarations]: Found implementation of procedure release_region [2023-11-19 05:10:55,518 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 05:10:55,518 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 05:10:55,518 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock_init [2023-11-19 05:10:55,519 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock_init [2023-11-19 05:10:55,519 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2023-11-19 05:10:55,519 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-19 05:10:55,519 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-19 05:10:55,520 INFO L130 BoogieDeclarations]: Found specification of procedure del_timer [2023-11-19 05:10:55,520 INFO L138 BoogieDeclarations]: Found implementation of procedure del_timer [2023-11-19 05:10:55,520 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 05:10:55,521 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-19 05:10:55,521 INFO L130 BoogieDeclarations]: Found specification of procedure add_timer [2023-11-19 05:10:55,521 INFO L138 BoogieDeclarations]: Found implementation of procedure add_timer [2023-11-19 05:10:55,521 INFO L130 BoogieDeclarations]: Found specification of procedure cdev_add [2023-11-19 05:10:55,522 INFO L138 BoogieDeclarations]: Found implementation of procedure cdev_add [2023-11-19 05:10:55,522 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~X~int~X~$Pointer$~TO~int [2023-11-19 05:10:55,522 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~X~int~X~$Pointer$~TO~int [2023-11-19 05:10:55,522 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-19 05:10:55,523 INFO L130 BoogieDeclarations]: Found specification of procedure printk [2023-11-19 05:10:55,523 INFO L138 BoogieDeclarations]: Found implementation of procedure printk [2023-11-19 05:10:55,523 INFO L130 BoogieDeclarations]: Found specification of procedure outw [2023-11-19 05:10:55,523 INFO L138 BoogieDeclarations]: Found implementation of procedure outw [2023-11-19 05:10:55,524 INFO L130 BoogieDeclarations]: Found specification of procedure outb [2023-11-19 05:10:55,524 INFO L138 BoogieDeclarations]: Found implementation of procedure outb [2023-11-19 05:10:55,524 INFO L130 BoogieDeclarations]: Found specification of procedure misc_deregister [2023-11-19 05:10:55,524 INFO L138 BoogieDeclarations]: Found implementation of procedure misc_deregister [2023-11-19 05:10:55,525 INFO L130 BoogieDeclarations]: Found specification of procedure assert_context_process [2023-11-19 05:10:55,525 INFO L138 BoogieDeclarations]: Found implementation of procedure assert_context_process [2023-11-19 05:10:55,526 INFO L130 BoogieDeclarations]: Found specification of procedure zf_set_control [2023-11-19 05:10:55,526 INFO L138 BoogieDeclarations]: Found implementation of procedure zf_set_control [2023-11-19 05:10:55,526 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 05:10:55,527 INFO L130 BoogieDeclarations]: Found specification of procedure zf_readw [2023-11-19 05:10:55,528 INFO L138 BoogieDeclarations]: Found implementation of procedure zf_readw [2023-11-19 05:10:55,529 INFO L130 BoogieDeclarations]: Found specification of procedure zf_ping [2023-11-19 05:10:55,529 INFO L138 BoogieDeclarations]: Found implementation of procedure zf_ping [2023-11-19 05:10:55,529 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~X~int~X~int~TO~int [2023-11-19 05:10:55,530 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~X~int~X~int~TO~int [2023-11-19 05:10:55,530 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock [2023-11-19 05:10:55,530 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock [2023-11-19 05:10:55,530 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2023-11-19 05:10:55,531 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2023-11-19 05:10:55,531 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 05:10:55,978 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 05:10:55,981 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 05:10:58,163 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 05:10:58,692 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 05:10:58,693 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-19 05:10:58,700 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:10:58 BoogieIcfgContainer [2023-11-19 05:10:58,700 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 05:10:58,703 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 05:10:58,703 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 05:10:58,706 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 05:10:58,706 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 05:10:52" (1/3) ... [2023-11-19 05:10:58,707 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@264d3bce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:10:58, skipping insertion in model container [2023-11-19 05:10:58,707 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:10:54" (2/3) ... [2023-11-19 05:10:58,708 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@264d3bce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:10:58, skipping insertion in model container [2023-11-19 05:10:58,708 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:10:58" (3/3) ... [2023-11-19 05:10:58,709 INFO L112 eAbstractionObserver]: Analyzing ICFG ddv_machzwd_outb.i [2023-11-19 05:10:58,728 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 05:10:58,728 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 05:10:58,793 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 05:10:58,802 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;@4fefce2b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-19 05:10:58,802 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-19 05:10:58,810 INFO L276 IsEmpty]: Start isEmpty. Operand has 265 states, 159 states have (on average 1.3584905660377358) internal successors, (216), 166 states have internal predecessors, (216), 78 states have call successors, (78), 26 states have call predecessors, (78), 26 states have return successors, (78), 78 states have call predecessors, (78), 78 states have call successors, (78) [2023-11-19 05:10:58,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-19 05:10:58,819 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:10:58,820 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:10:58,820 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting outbErr0ASSERT_VIOLATIONERROR_FUNCTION === [outbErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:10:58,826 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:10:58,826 INFO L85 PathProgramCache]: Analyzing trace with hash -488996333, now seen corresponding path program 1 times [2023-11-19 05:10:58,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:10:58,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506388581] [2023-11-19 05:10:58,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:10:58,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:10:59,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:10:59,515 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 05:10:59,516 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:10:59,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506388581] [2023-11-19 05:10:59,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506388581] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:10:59,517 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:10:59,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 05:10:59,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293472701] [2023-11-19 05:10:59,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:10:59,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:10:59,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:10:59,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:10:59,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:10:59,575 INFO L87 Difference]: Start difference. First operand has 265 states, 159 states have (on average 1.3584905660377358) internal successors, (216), 166 states have internal predecessors, (216), 78 states have call successors, (78), 26 states have call predecessors, (78), 26 states have return successors, (78), 78 states have call predecessors, (78), 78 states have call successors, (78) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-19 05:11:00,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:11:00,759 INFO L93 Difference]: Finished difference Result 528 states and 772 transitions. [2023-11-19 05:11:00,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:11:00,764 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 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 17 [2023-11-19 05:11:00,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:11:00,788 INFO L225 Difference]: With dead ends: 528 [2023-11-19 05:11:00,789 INFO L226 Difference]: Without dead ends: 261 [2023-11-19 05:11:00,801 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:11:00,812 INFO L413 NwaCegarLoop]: 311 mSDtfsCounter, 0 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 621 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-19 05:11:00,816 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 621 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-19 05:11:00,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2023-11-19 05:11:00,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 261. [2023-11-19 05:11:00,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 158 states have (on average 1.3417721518987342) internal successors, (212), 165 states have internal predecessors, (212), 76 states have call successors, (76), 26 states have call predecessors, (76), 26 states have return successors, (75), 75 states have call predecessors, (75), 75 states have call successors, (75) [2023-11-19 05:11:00,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 363 transitions. [2023-11-19 05:11:00,952 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 363 transitions. Word has length 17 [2023-11-19 05:11:00,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:11:00,954 INFO L495 AbstractCegarLoop]: Abstraction has 261 states and 363 transitions. [2023-11-19 05:11:00,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-19 05:11:00,954 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 363 transitions. [2023-11-19 05:11:00,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-19 05:11:00,956 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:11:00,956 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:11:00,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 05:11:00,957 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting outbErr0ASSERT_VIOLATIONERROR_FUNCTION === [outbErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:11:00,958 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:11:00,958 INFO L85 PathProgramCache]: Analyzing trace with hash 1111278110, now seen corresponding path program 1 times [2023-11-19 05:11:00,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:11:00,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231712336] [2023-11-19 05:11:00,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:11:00,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:11:01,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:11:01,337 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 05:11:01,338 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:11:01,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231712336] [2023-11-19 05:11:01,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231712336] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:11:01,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867879894] [2023-11-19 05:11:01,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:11:01,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:11:01,341 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cadc6e3-28d2-4c67-8c0d-93fe4a6c5da7/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:11:01,355 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cadc6e3-28d2-4c67-8c0d-93fe4a6c5da7/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:11:01,376 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cadc6e3-28d2-4c67-8c0d-93fe4a6c5da7/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 05:11:01,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:11:01,812 INFO L262 TraceCheckSpWp]: Trace formula consists of 740 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 05:11:01,818 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:11:01,862 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 05:11:01,863 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 05:11:01,891 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 05:11:01,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [867879894] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 05:11:01,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1773729424] [2023-11-19 05:11:01,916 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2023-11-19 05:11:01,916 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 05:11:01,920 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 05:11:01,925 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 05:11:01,925 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 05:11:21,292 INFO L197 IcfgInterpreter]: Interpreting procedure printk with input of size 182 for LOIs [2023-11-19 05:11:21,346 INFO L197 IcfgInterpreter]: Interpreting procedure spin_lock_init with input of size 761 for LOIs [2023-11-19 05:11:22,339 INFO L197 IcfgInterpreter]: Interpreting procedure zf_readw with input of size 180 for LOIs [2023-11-19 05:11:22,446 INFO L197 IcfgInterpreter]: Interpreting procedure outb with input of size 183 for LOIs [2023-11-19 05:11:22,707 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-19 05:11:35,911 WARN L293 SmtUtils]: Spent 12.18s on a formula simplification. DAG size of input: 751 DAG size of output: 687 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)