./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ddv-machzwd/ddv_machzwd_inw.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 30e01a73 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_315980ed-9978-46fc-a4ec-0a81bb9854c1/bin/utaipan-verify-mE87zJ7Ire/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_315980ed-9978-46fc-a4ec-0a81bb9854c1/bin/utaipan-verify-mE87zJ7Ire/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_315980ed-9978-46fc-a4ec-0a81bb9854c1/bin/utaipan-verify-mE87zJ7Ire/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_315980ed-9978-46fc-a4ec-0a81bb9854c1/bin/utaipan-verify-mE87zJ7Ire/config/TaipanReach.xml -i ../../sv-benchmarks/c/ddv-machzwd/ddv_machzwd_inw.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_315980ed-9978-46fc-a4ec-0a81bb9854c1/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_315980ed-9978-46fc-a4ec-0a81bb9854c1/bin/utaipan-verify-mE87zJ7Ire --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 6e6f79eda5be95b806b33aaa2a353a360ae33a1e35cc1bf6f128d14768d932de --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 20:36:47,309 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 20:36:47,458 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_315980ed-9978-46fc-a4ec-0a81bb9854c1/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-23 20:36:47,469 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 20:36:47,471 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 20:36:47,518 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 20:36:47,519 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 20:36:47,520 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 20:36:47,521 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 20:36:47,527 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 20:36:47,528 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-23 20:36:47,530 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-23 20:36:47,530 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-23 20:36:47,532 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-23 20:36:47,533 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-23 20:36:47,533 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-23 20:36:47,534 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-23 20:36:47,535 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-23 20:36:47,535 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-23 20:36:47,536 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-23 20:36:47,536 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-23 20:36:47,537 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-23 20:36:47,538 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 20:36:47,539 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 20:36:47,540 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 20:36:47,540 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 20:36:47,541 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 20:36:47,541 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 20:36:47,542 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 20:36:47,542 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 20:36:47,544 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 20:36:47,544 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 20:36:47,545 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 20:36:47,545 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 20:36:47,545 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 20:36:47,545 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 20:36:47,546 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 20:36:47,546 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 20:36:47,547 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 20:36:47,548 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 20:36:47,548 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 20:36:47,549 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-23 20:36:47,549 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 20:36:47,550 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 20:36:47,550 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 20:36:47,551 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-23 20:36:47,551 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 20:36:47,552 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_315980ed-9978-46fc-a4ec-0a81bb9854c1/bin/utaipan-verify-mE87zJ7Ire/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_315980ed-9978-46fc-a4ec-0a81bb9854c1/bin/utaipan-verify-mE87zJ7Ire Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6e6f79eda5be95b806b33aaa2a353a360ae33a1e35cc1bf6f128d14768d932de [2023-11-23 20:36:47,980 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 20:36:48,021 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 20:36:48,025 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 20:36:48,028 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 20:36:48,029 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 20:36:48,030 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_315980ed-9978-46fc-a4ec-0a81bb9854c1/bin/utaipan-verify-mE87zJ7Ire/../../sv-benchmarks/c/ddv-machzwd/ddv_machzwd_inw.i [2023-11-23 20:36:51,986 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 20:36:52,491 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 20:36:52,492 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_315980ed-9978-46fc-a4ec-0a81bb9854c1/sv-benchmarks/c/ddv-machzwd/ddv_machzwd_inw.i [2023-11-23 20:36:52,527 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_315980ed-9978-46fc-a4ec-0a81bb9854c1/bin/utaipan-verify-mE87zJ7Ire/data/09b258175/9383bd7be92f42578dc8ab62ed9f1a85/FLAG7fc99006f [2023-11-23 20:36:52,546 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_315980ed-9978-46fc-a4ec-0a81bb9854c1/bin/utaipan-verify-mE87zJ7Ire/data/09b258175/9383bd7be92f42578dc8ab62ed9f1a85 [2023-11-23 20:36:52,549 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 20:36:52,551 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 20:36:52,553 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 20:36:52,553 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 20:36:52,560 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 20:36:52,561 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:36:52" (1/1) ... [2023-11-23 20:36:52,562 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@58bd3c1a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:52, skipping insertion in model container [2023-11-23 20:36:52,563 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:36:52" (1/1) ... [2023-11-23 20:36:52,682 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 20:36:52,960 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_315980ed-9978-46fc-a4ec-0a81bb9854c1/sv-benchmarks/c/ddv-machzwd/ddv_machzwd_inw.i[452,465] [2023-11-23 20:36:54,386 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 20:36:54,454 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 20:36:54,469 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_315980ed-9978-46fc-a4ec-0a81bb9854c1/sv-benchmarks/c/ddv-machzwd/ddv_machzwd_inw.i[452,465] [2023-11-23 20:36:54,788 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 20:36:54,960 WARN L675 CHandler]: The function __VERIFIER_nondet_sector_t is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 20:36:54,969 INFO L206 MainTranslator]: Completed translation [2023-11-23 20:36:54,970 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:54 WrapperNode [2023-11-23 20:36:54,970 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 20:36:54,972 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 20:36:54,972 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 20:36:54,972 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 20:36:54,978 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:54" (1/1) ... [2023-11-23 20:36:55,039 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:54" (1/1) ... [2023-11-23 20:36:55,122 INFO L138 Inliner]: procedures = 474, calls = 839, calls flagged for inlining = 54, calls inlined = 38, statements flattened = 1089 [2023-11-23 20:36:55,123 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 20:36:55,123 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 20:36:55,123 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 20:36:55,124 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 20:36:55,153 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:54" (1/1) ... [2023-11-23 20:36:55,153 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:54" (1/1) ... [2023-11-23 20:36:55,164 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:54" (1/1) ... [2023-11-23 20:36:55,165 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:54" (1/1) ... [2023-11-23 20:36:55,209 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:54" (1/1) ... [2023-11-23 20:36:55,217 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:54" (1/1) ... [2023-11-23 20:36:55,240 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:54" (1/1) ... [2023-11-23 20:36:55,247 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:54" (1/1) ... [2023-11-23 20:36:55,271 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 20:36:55,285 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 20:36:55,285 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 20:36:55,285 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 20:36:55,286 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:54" (1/1) ... [2023-11-23 20:36:55,292 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 20:36:55,306 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_315980ed-9978-46fc-a4ec-0a81bb9854c1/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:36:55,325 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_315980ed-9978-46fc-a4ec-0a81bb9854c1/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 20:36:55,351 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_315980ed-9978-46fc-a4ec-0a81bb9854c1/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 20:36:55,385 INFO L130 BoogieDeclarations]: Found specification of procedure zf_timer_off [2023-11-23 20:36:55,385 INFO L138 BoogieDeclarations]: Found implementation of procedure zf_timer_off [2023-11-23 20:36:55,386 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-23 20:36:55,387 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_atomic_begin [2023-11-23 20:36:55,388 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2023-11-23 20:36:55,389 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2023-11-23 20:36:55,389 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-23 20:36:55,389 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock [2023-11-23 20:36:55,389 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock [2023-11-23 20:36:55,389 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-23 20:36:55,389 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_atomic_end [2023-11-23 20:36:55,390 INFO L130 BoogieDeclarations]: Found specification of procedure zf_get_control [2023-11-23 20:36:55,390 INFO L138 BoogieDeclarations]: Found implementation of procedure zf_get_control [2023-11-23 20:36:55,390 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2023-11-23 20:36:55,390 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-23 20:36:55,391 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-23 20:36:55,392 INFO L130 BoogieDeclarations]: Found specification of procedure request_region [2023-11-23 20:36:55,392 INFO L138 BoogieDeclarations]: Found implementation of procedure request_region [2023-11-23 20:36:55,392 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 20:36:55,392 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-23 20:36:55,393 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2023-11-23 20:36:55,394 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2023-11-23 20:36:55,394 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock_irqsave [2023-11-23 20:36:55,394 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock_irqsave [2023-11-23 20:36:55,394 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~TO~VOID [2023-11-23 20:36:55,395 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~TO~VOID [2023-11-23 20:36:55,395 INFO L130 BoogieDeclarations]: Found specification of procedure release_region [2023-11-23 20:36:55,396 INFO L138 BoogieDeclarations]: Found implementation of procedure release_region [2023-11-23 20:36:55,396 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 20:36:55,396 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 20:36:55,396 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock_init [2023-11-23 20:36:55,397 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock_init [2023-11-23 20:36:55,398 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2023-11-23 20:36:55,398 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-23 20:36:55,398 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-23 20:36:55,398 INFO L130 BoogieDeclarations]: Found specification of procedure del_timer [2023-11-23 20:36:55,398 INFO L138 BoogieDeclarations]: Found implementation of procedure del_timer [2023-11-23 20:36:55,399 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-23 20:36:55,399 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-23 20:36:55,399 INFO L130 BoogieDeclarations]: Found specification of procedure add_timer [2023-11-23 20:36:55,399 INFO L138 BoogieDeclarations]: Found implementation of procedure add_timer [2023-11-23 20:36:55,399 INFO L130 BoogieDeclarations]: Found specification of procedure cdev_add [2023-11-23 20:36:55,399 INFO L138 BoogieDeclarations]: Found implementation of procedure cdev_add [2023-11-23 20:36:55,400 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~X~int~X~$Pointer$~TO~int [2023-11-23 20:36:55,400 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~X~int~X~$Pointer$~TO~int [2023-11-23 20:36:55,400 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-23 20:36:55,400 INFO L130 BoogieDeclarations]: Found specification of procedure printk [2023-11-23 20:36:55,400 INFO L138 BoogieDeclarations]: Found implementation of procedure printk [2023-11-23 20:36:55,401 INFO L130 BoogieDeclarations]: Found specification of procedure outw [2023-11-23 20:36:55,401 INFO L138 BoogieDeclarations]: Found implementation of procedure outw [2023-11-23 20:36:55,401 INFO L130 BoogieDeclarations]: Found specification of procedure outb [2023-11-23 20:36:55,401 INFO L138 BoogieDeclarations]: Found implementation of procedure outb [2023-11-23 20:36:55,401 INFO L130 BoogieDeclarations]: Found specification of procedure misc_deregister [2023-11-23 20:36:55,401 INFO L138 BoogieDeclarations]: Found implementation of procedure misc_deregister [2023-11-23 20:36:55,402 INFO L130 BoogieDeclarations]: Found specification of procedure assert_context_process [2023-11-23 20:36:55,402 INFO L138 BoogieDeclarations]: Found implementation of procedure assert_context_process [2023-11-23 20:36:55,402 INFO L130 BoogieDeclarations]: Found specification of procedure zf_set_control [2023-11-23 20:36:55,403 INFO L138 BoogieDeclarations]: Found implementation of procedure zf_set_control [2023-11-23 20:36:55,404 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-23 20:36:55,404 INFO L130 BoogieDeclarations]: Found specification of procedure zf_readw [2023-11-23 20:36:55,405 INFO L138 BoogieDeclarations]: Found implementation of procedure zf_readw [2023-11-23 20:36:55,405 INFO L130 BoogieDeclarations]: Found specification of procedure zf_ping [2023-11-23 20:36:55,405 INFO L138 BoogieDeclarations]: Found implementation of procedure zf_ping [2023-11-23 20:36:55,405 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~X~int~X~int~TO~int [2023-11-23 20:36:55,405 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~X~int~X~int~TO~int [2023-11-23 20:36:55,406 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock [2023-11-23 20:36:55,406 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock [2023-11-23 20:36:55,406 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2023-11-23 20:36:55,406 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2023-11-23 20:36:55,406 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-23 20:36:55,847 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 20:36:55,850 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 20:36:57,210 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 20:36:57,727 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 20:36:57,727 INFO L309 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-23 20:36:57,729 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:36:57 BoogieIcfgContainer [2023-11-23 20:36:57,729 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 20:36:57,732 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 20:36:57,733 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 20:36:57,737 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 20:36:57,737 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 08:36:52" (1/3) ... [2023-11-23 20:36:57,738 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d525516 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:36:57, skipping insertion in model container [2023-11-23 20:36:57,738 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:54" (2/3) ... [2023-11-23 20:36:57,739 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d525516 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:36:57, skipping insertion in model container [2023-11-23 20:36:57,739 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:36:57" (3/3) ... [2023-11-23 20:36:57,741 INFO L112 eAbstractionObserver]: Analyzing ICFG ddv_machzwd_inw.i [2023-11-23 20:36:57,766 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 20:36:57,766 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-23 20:36:57,840 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 20:36:57,849 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;@57c9f1eb, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 20:36:57,850 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-23 20:36:57,859 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) [2023-11-23 20:36:57,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-23 20:36:57,869 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:36:57,870 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:36:57,870 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting zf_readwErr0ASSERT_VIOLATIONERROR_FUNCTION === [zf_readwErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:36:57,877 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:36:57,877 INFO L85 PathProgramCache]: Analyzing trace with hash 452926562, now seen corresponding path program 1 times [2023-11-23 20:36:57,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:36:57,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099767046] [2023-11-23 20:36:57,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:36:57,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:36:58,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:36:58,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:36:58,650 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:36:58,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099767046] [2023-11-23 20:36:58,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099767046] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:36:58,651 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:36:58,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 20:36:58,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998410472] [2023-11-23 20:36:58,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:36:58,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 20:36:58,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:36:58,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 20:36:58,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 20:36:58,698 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 4.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-23 20:36:59,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:36:59,840 INFO L93 Difference]: Finished difference Result 528 states and 756 transitions. [2023-11-23 20:36:59,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 20:36:59,843 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 19 [2023-11-23 20:36:59,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:36:59,856 INFO L225 Difference]: With dead ends: 528 [2023-11-23 20:36:59,856 INFO L226 Difference]: Without dead ends: 261 [2023-11-23 20:36:59,863 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 20:36:59,867 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 [2023-11-23 20:36:59,869 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] [2023-11-23 20:36:59,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2023-11-23 20:36:59,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 261. [2023-11-23 20:36:59,949 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) [2023-11-23 20:36:59,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 363 transitions. [2023-11-23 20:36:59,955 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 363 transitions. Word has length 19 [2023-11-23 20:36:59,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:36:59,957 INFO L495 AbstractCegarLoop]: Abstraction has 261 states and 363 transitions. [2023-11-23 20:36:59,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-23 20:36:59,957 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 363 transitions. [2023-11-23 20:36:59,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-11-23 20:36:59,959 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:36:59,959 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] [2023-11-23 20:36:59,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 20:36:59,960 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting zf_readwErr0ASSERT_VIOLATIONERROR_FUNCTION === [zf_readwErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:36:59,960 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:36:59,960 INFO L85 PathProgramCache]: Analyzing trace with hash -746719643, now seen corresponding path program 1 times [2023-11-23 20:36:59,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:36:59,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719791655] [2023-11-23 20:36:59,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:36:59,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:37:00,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:37:00,329 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 20:37:00,330 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:37:00,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719791655] [2023-11-23 20:37:00,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719791655] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 20:37:00,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407211011] [2023-11-23 20:37:00,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:37:00,340 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:37:00,341 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_315980ed-9978-46fc-a4ec-0a81bb9854c1/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:37:00,349 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_315980ed-9978-46fc-a4ec-0a81bb9854c1/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:37:00,376 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_315980ed-9978-46fc-a4ec-0a81bb9854c1/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 20:37:00,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:37:00,878 INFO L262 TraceCheckSpWp]: Trace formula consists of 745 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-23 20:37:00,885 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:37:00,960 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 20:37:00,960 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 20:37:00,995 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 20:37:00,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1407211011] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 20:37:00,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [756864177] [2023-11-23 20:37:01,018 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2023-11-23 20:37:01,019 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 20:37:01,024 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 20:37:01,030 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 20:37:01,030 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 20:37:22,547 INFO L197 IcfgInterpreter]: Interpreting procedure printk with input of size 182 for LOIs [2023-11-23 20:37:22,600 INFO L197 IcfgInterpreter]: Interpreting procedure spin_lock_init with input of size 761 for LOIs [2023-11-23 20:37:24,077 INFO L197 IcfgInterpreter]: Interpreting procedure zf_readw with input of size 180 for LOIs [2023-11-23 20:37:24,926 INFO L197 IcfgInterpreter]: Interpreting procedure outb with input of size 183 for LOIs [2023-11-23 20:37:25,009 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-23 20:37:39,573 WARN L293 SmtUtils]: Spent 13.41s 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)