./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 527bcce2 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_8800766a-aea8-40c6-80cf-3923dd8ee3a8/bin/utaipan-verify-QoSU8krkJ5/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8800766a-aea8-40c6-80cf-3923dd8ee3a8/bin/utaipan-verify-QoSU8krkJ5/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8800766a-aea8-40c6-80cf-3923dd8ee3a8/bin/utaipan-verify-QoSU8krkJ5/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8800766a-aea8-40c6-80cf-3923dd8ee3a8/bin/utaipan-verify-QoSU8krkJ5/config/TaipanReach.xml -i ../../sv-benchmarks/c/ddv-machzwd/ddv_machzwd_inw.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8800766a-aea8-40c6-80cf-3923dd8ee3a8/bin/utaipan-verify-QoSU8krkJ5/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8800766a-aea8-40c6-80cf-3923dd8ee3a8/bin/utaipan-verify-QoSU8krkJ5 --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-527bcce [2023-11-21 19:44:04,218 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-21 19:44:04,298 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8800766a-aea8-40c6-80cf-3923dd8ee3a8/bin/utaipan-verify-QoSU8krkJ5/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-21 19:44:04,304 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-21 19:44:04,304 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-21 19:44:04,332 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-21 19:44:04,333 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-21 19:44:04,334 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-21 19:44:04,335 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-21 19:44:04,335 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-21 19:44:04,336 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-21 19:44:04,336 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-21 19:44:04,337 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-21 19:44:04,337 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-21 19:44:04,338 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-21 19:44:04,339 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-21 19:44:04,339 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-21 19:44:04,340 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-21 19:44:04,340 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-21 19:44:04,341 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-21 19:44:04,342 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-21 19:44:04,342 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-21 19:44:04,343 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-21 19:44:04,344 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-21 19:44:04,344 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-21 19:44:04,345 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-21 19:44:04,346 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-21 19:44:04,346 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-21 19:44:04,347 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-21 19:44:04,347 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-21 19:44:04,347 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-21 19:44:04,348 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-21 19:44:04,349 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-21 19:44:04,349 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-21 19:44:04,349 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-21 19:44:04,350 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-21 19:44:04,350 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-21 19:44:04,351 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 19:44:04,351 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-21 19:44:04,351 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-21 19:44:04,352 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-21 19:44:04,352 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-21 19:44:04,352 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-21 19:44:04,353 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-21 19:44:04,353 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-21 19:44:04,353 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-21 19:44:04,353 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-21 19:44:04,354 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_8800766a-aea8-40c6-80cf-3923dd8ee3a8/bin/utaipan-verify-QoSU8krkJ5/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8800766a-aea8-40c6-80cf-3923dd8ee3a8/bin/utaipan-verify-QoSU8krkJ5 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6e6f79eda5be95b806b33aaa2a353a360ae33a1e35cc1bf6f128d14768d932de [2023-11-21 19:44:04,645 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-21 19:44:04,679 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-21 19:44:04,682 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-21 19:44:04,684 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-21 19:44:04,685 INFO L274 PluginConnector]: CDTParser initialized [2023-11-21 19:44:04,686 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8800766a-aea8-40c6-80cf-3923dd8ee3a8/bin/utaipan-verify-QoSU8krkJ5/../../sv-benchmarks/c/ddv-machzwd/ddv_machzwd_inw.i [2023-11-21 19:44:07,959 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-21 19:44:08,409 INFO L384 CDTParser]: Found 1 translation units. [2023-11-21 19:44:08,412 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8800766a-aea8-40c6-80cf-3923dd8ee3a8/sv-benchmarks/c/ddv-machzwd/ddv_machzwd_inw.i [2023-11-21 19:44:08,455 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8800766a-aea8-40c6-80cf-3923dd8ee3a8/bin/utaipan-verify-QoSU8krkJ5/data/11452cb59/7919c2460b2c474ead4226573388c06e/FLAGe27f5559d [2023-11-21 19:44:08,474 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8800766a-aea8-40c6-80cf-3923dd8ee3a8/bin/utaipan-verify-QoSU8krkJ5/data/11452cb59/7919c2460b2c474ead4226573388c06e [2023-11-21 19:44:08,481 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-21 19:44:08,483 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-21 19:44:08,487 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-21 19:44:08,488 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-21 19:44:08,494 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-21 19:44:08,498 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 07:44:08" (1/1) ... [2023-11-21 19:44:08,499 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@226bac93 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:44:08, skipping insertion in model container [2023-11-21 19:44:08,499 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 07:44:08" (1/1) ... [2023-11-21 19:44:08,604 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-21 19:44:08,839 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_8800766a-aea8-40c6-80cf-3923dd8ee3a8/sv-benchmarks/c/ddv-machzwd/ddv_machzwd_inw.i[452,465] [2023-11-21 19:44:10,279 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 19:44:10,346 INFO L202 MainTranslator]: Completed pre-run [2023-11-21 19:44:10,361 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_8800766a-aea8-40c6-80cf-3923dd8ee3a8/sv-benchmarks/c/ddv-machzwd/ddv_machzwd_inw.i[452,465] [2023-11-21 19:44:10,727 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 19:44:10,919 WARN L675 CHandler]: The function __VERIFIER_nondet_sector_t is called, but not defined or handled by StandardFunctionHandler. [2023-11-21 19:44:10,929 INFO L206 MainTranslator]: Completed translation [2023-11-21 19:44:10,929 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:44:10 WrapperNode [2023-11-21 19:44:10,930 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-21 19:44:10,931 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-21 19:44:10,932 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-21 19:44:10,932 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-21 19:44:10,941 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:44:10" (1/1) ... [2023-11-21 19:44:11,033 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:44:10" (1/1) ... [2023-11-21 19:44:11,134 INFO L138 Inliner]: procedures = 474, calls = 839, calls flagged for inlining = 54, calls inlined = 38, statements flattened = 1089 [2023-11-21 19:44:11,135 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-21 19:44:11,135 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-21 19:44:11,136 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-21 19:44:11,136 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-21 19:44:11,161 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:44:10" (1/1) ... [2023-11-21 19:44:11,162 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:44:10" (1/1) ... [2023-11-21 19:44:11,169 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:44:10" (1/1) ... [2023-11-21 19:44:11,170 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:44:10" (1/1) ... [2023-11-21 19:44:11,218 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:44:10" (1/1) ... [2023-11-21 19:44:11,227 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:44:10" (1/1) ... [2023-11-21 19:44:11,262 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:44:10" (1/1) ... [2023-11-21 19:44:11,269 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:44:10" (1/1) ... [2023-11-21 19:44:11,282 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-21 19:44:11,287 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-21 19:44:11,288 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-21 19:44:11,288 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-21 19:44:11,289 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:44:10" (1/1) ... [2023-11-21 19:44:11,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 19:44:11,309 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8800766a-aea8-40c6-80cf-3923dd8ee3a8/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 19:44:11,324 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8800766a-aea8-40c6-80cf-3923dd8ee3a8/bin/utaipan-verify-QoSU8krkJ5/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-21 19:44:11,354 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8800766a-aea8-40c6-80cf-3923dd8ee3a8/bin/utaipan-verify-QoSU8krkJ5/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-21 19:44:11,366 INFO L130 BoogieDeclarations]: Found specification of procedure zf_timer_off [2023-11-21 19:44:11,366 INFO L138 BoogieDeclarations]: Found implementation of procedure zf_timer_off [2023-11-21 19:44:11,367 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-21 19:44:11,368 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_atomic_begin [2023-11-21 19:44:11,369 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2023-11-21 19:44:11,369 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2023-11-21 19:44:11,369 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-21 19:44:11,369 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock [2023-11-21 19:44:11,370 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock [2023-11-21 19:44:11,370 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-21 19:44:11,370 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_atomic_end [2023-11-21 19:44:11,370 INFO L130 BoogieDeclarations]: Found specification of procedure zf_get_control [2023-11-21 19:44:11,370 INFO L138 BoogieDeclarations]: Found implementation of procedure zf_get_control [2023-11-21 19:44:11,370 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2023-11-21 19:44:11,371 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-21 19:44:11,371 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-21 19:44:11,372 INFO L130 BoogieDeclarations]: Found specification of procedure request_region [2023-11-21 19:44:11,372 INFO L138 BoogieDeclarations]: Found implementation of procedure request_region [2023-11-21 19:44:11,372 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-21 19:44:11,372 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-21 19:44:11,373 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2023-11-21 19:44:11,374 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2023-11-21 19:44:11,374 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock_irqsave [2023-11-21 19:44:11,374 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock_irqsave [2023-11-21 19:44:11,374 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~TO~VOID [2023-11-21 19:44:11,375 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~TO~VOID [2023-11-21 19:44:11,375 INFO L130 BoogieDeclarations]: Found specification of procedure release_region [2023-11-21 19:44:11,375 INFO L138 BoogieDeclarations]: Found implementation of procedure release_region [2023-11-21 19:44:11,375 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-21 19:44:11,376 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-21 19:44:11,376 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock_init [2023-11-21 19:44:11,377 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock_init [2023-11-21 19:44:11,377 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2023-11-21 19:44:11,377 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-21 19:44:11,377 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-21 19:44:11,377 INFO L130 BoogieDeclarations]: Found specification of procedure del_timer [2023-11-21 19:44:11,377 INFO L138 BoogieDeclarations]: Found implementation of procedure del_timer [2023-11-21 19:44:11,378 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-21 19:44:11,378 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-21 19:44:11,378 INFO L130 BoogieDeclarations]: Found specification of procedure add_timer [2023-11-21 19:44:11,378 INFO L138 BoogieDeclarations]: Found implementation of procedure add_timer [2023-11-21 19:44:11,378 INFO L130 BoogieDeclarations]: Found specification of procedure cdev_add [2023-11-21 19:44:11,378 INFO L138 BoogieDeclarations]: Found implementation of procedure cdev_add [2023-11-21 19:44:11,379 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~X~int~X~$Pointer$~TO~int [2023-11-21 19:44:11,379 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~X~int~X~$Pointer$~TO~int [2023-11-21 19:44:11,379 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-21 19:44:11,379 INFO L130 BoogieDeclarations]: Found specification of procedure printk [2023-11-21 19:44:11,379 INFO L138 BoogieDeclarations]: Found implementation of procedure printk [2023-11-21 19:44:11,379 INFO L130 BoogieDeclarations]: Found specification of procedure outw [2023-11-21 19:44:11,380 INFO L138 BoogieDeclarations]: Found implementation of procedure outw [2023-11-21 19:44:11,380 INFO L130 BoogieDeclarations]: Found specification of procedure outb [2023-11-21 19:44:11,380 INFO L138 BoogieDeclarations]: Found implementation of procedure outb [2023-11-21 19:44:11,380 INFO L130 BoogieDeclarations]: Found specification of procedure misc_deregister [2023-11-21 19:44:11,380 INFO L138 BoogieDeclarations]: Found implementation of procedure misc_deregister [2023-11-21 19:44:11,380 INFO L130 BoogieDeclarations]: Found specification of procedure assert_context_process [2023-11-21 19:44:11,381 INFO L138 BoogieDeclarations]: Found implementation of procedure assert_context_process [2023-11-21 19:44:11,381 INFO L130 BoogieDeclarations]: Found specification of procedure zf_set_control [2023-11-21 19:44:11,381 INFO L138 BoogieDeclarations]: Found implementation of procedure zf_set_control [2023-11-21 19:44:11,382 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-21 19:44:11,383 INFO L130 BoogieDeclarations]: Found specification of procedure zf_readw [2023-11-21 19:44:11,383 INFO L138 BoogieDeclarations]: Found implementation of procedure zf_readw [2023-11-21 19:44:11,383 INFO L130 BoogieDeclarations]: Found specification of procedure zf_ping [2023-11-21 19:44:11,383 INFO L138 BoogieDeclarations]: Found implementation of procedure zf_ping [2023-11-21 19:44:11,384 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~X~int~X~int~TO~int [2023-11-21 19:44:11,384 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~X~int~X~int~TO~int [2023-11-21 19:44:11,384 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock [2023-11-21 19:44:11,384 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock [2023-11-21 19:44:11,384 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2023-11-21 19:44:11,384 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2023-11-21 19:44:11,385 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-21 19:44:11,827 INFO L240 CfgBuilder]: Building ICFG [2023-11-21 19:44:11,832 INFO L266 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-21 19:44:13,996 INFO L281 CfgBuilder]: Performing block encoding [2023-11-21 19:44:14,633 INFO L303 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-21 19:44:14,633 INFO L308 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-21 19:44:14,636 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 07:44:14 BoogieIcfgContainer [2023-11-21 19:44:14,636 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-21 19:44:14,641 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-21 19:44:14,641 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-21 19:44:14,645 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-21 19:44:14,645 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 07:44:08" (1/3) ... [2023-11-21 19:44:14,646 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5243366f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 07:44:14, skipping insertion in model container [2023-11-21 19:44:14,647 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:44:10" (2/3) ... [2023-11-21 19:44:14,649 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5243366f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 07:44:14, skipping insertion in model container [2023-11-21 19:44:14,649 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 07:44:14" (3/3) ... [2023-11-21 19:44:14,653 INFO L112 eAbstractionObserver]: Analyzing ICFG ddv_machzwd_inw.i [2023-11-21 19:44:14,675 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-21 19:44:14,675 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-21 19:44:14,747 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-21 19:44:14,754 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;@dc4c689, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-21 19:44:14,754 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-21 19:44:14,760 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) [2023-11-21 19:44:14,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-21 19:44:14,768 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:44:14,769 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:44:14,770 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting zf_readwErr0ASSERT_VIOLATIONERROR_FUNCTION === [zf_readwErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:44:14,781 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:44:14,782 INFO L85 PathProgramCache]: Analyzing trace with hash 452926562, now seen corresponding path program 1 times [2023-11-21 19:44:14,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:44:14,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286594527] [2023-11-21 19:44:14,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:44:14,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:44:15,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:44:15,450 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:44:15,450 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:44:15,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286594527] [2023-11-21 19:44:15,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286594527] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:44:15,452 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:44:15,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 19:44:15,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360420367] [2023-11-21 19:44:15,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:44:15,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 19:44:15,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:44:15,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 19:44:15,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 19:44:15,542 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) [2023-11-21 19:44:16,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:44:16,732 INFO L93 Difference]: Finished difference Result 528 states and 756 transitions. [2023-11-21 19:44:16,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 19:44:16,735 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 [2023-11-21 19:44:16,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:44:16,756 INFO L225 Difference]: With dead ends: 528 [2023-11-21 19:44:16,757 INFO L226 Difference]: Without dead ends: 261 [2023-11-21 19:44:16,767 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 [2023-11-21 19:44:16,777 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 [2023-11-21 19:44:16,780 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] [2023-11-21 19:44:16,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2023-11-21 19:44:16,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 261. [2023-11-21 19:44:16,854 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) [2023-11-21 19:44:16,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 363 transitions. [2023-11-21 19:44:16,864 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 363 transitions. Word has length 19 [2023-11-21 19:44:16,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:44:16,866 INFO L495 AbstractCegarLoop]: Abstraction has 261 states and 363 transitions. [2023-11-21 19:44:16,866 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) [2023-11-21 19:44:16,866 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 363 transitions. [2023-11-21 19:44:16,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-11-21 19:44:16,867 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:44:16,868 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] [2023-11-21 19:44:16,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-21 19:44:16,868 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting zf_readwErr0ASSERT_VIOLATIONERROR_FUNCTION === [zf_readwErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:44:16,869 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:44:16,869 INFO L85 PathProgramCache]: Analyzing trace with hash -746719643, now seen corresponding path program 1 times [2023-11-21 19:44:16,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:44:16,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031720456] [2023-11-21 19:44:16,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:44:16,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:44:17,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:44:17,278 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-21 19:44:17,279 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:44:17,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031720456] [2023-11-21 19:44:17,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031720456] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 19:44:17,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948505167] [2023-11-21 19:44:17,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:44:17,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:44:17,287 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8800766a-aea8-40c6-80cf-3923dd8ee3a8/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 19:44:17,289 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8800766a-aea8-40c6-80cf-3923dd8ee3a8/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 19:44:17,296 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8800766a-aea8-40c6-80cf-3923dd8ee3a8/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-21 19:44:17,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:44:17,793 INFO L262 TraceCheckSpWp]: Trace formula consists of 745 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-21 19:44:17,801 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 19:44:17,861 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-21 19:44:17,862 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 19:44:17,910 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-21 19:44:17,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1948505167] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 19:44:17,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [315094918] [2023-11-21 19:44:17,932 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2023-11-21 19:44:17,932 INFO L166 IcfgInterpreter]: Building call graph [2023-11-21 19:44:17,936 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-21 19:44:17,942 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-21 19:44:17,942 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-21 19:44:37,511 INFO L197 IcfgInterpreter]: Interpreting procedure printk with input of size 182 for LOIs [2023-11-21 19:44:37,569 INFO L197 IcfgInterpreter]: Interpreting procedure spin_lock_init with input of size 761 for LOIs [2023-11-21 19:44:38,840 INFO L197 IcfgInterpreter]: Interpreting procedure zf_readw with input of size 180 for LOIs [2023-11-21 19:44:39,676 INFO L197 IcfgInterpreter]: Interpreting procedure outb with input of size 183 for LOIs [2023-11-21 19:44:39,754 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-21 19:44:54,163 WARN L293 SmtUtils]: Spent 13.29s 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)