./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-data-race.prp --file ../../sv-benchmarks/c/pthread-atomic/qrcu-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for data races Using default analysis Version 5e519f3a 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_5531f3bd-ba33-4048-8269-aa87440f1765/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5531f3bd-ba33-4048-8269-aa87440f1765/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5531f3bd-ba33-4048-8269-aa87440f1765/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5531f3bd-ba33-4048-8269-aa87440f1765/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/pthread-atomic/qrcu-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5531f3bd-ba33-4048-8269-aa87440f1765/bin/utaipan-7li7fVZpFI/config/svcomp-DataRace-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5531f3bd-ba33-4048-8269-aa87440f1765/bin/utaipan-7li7fVZpFI --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! data-race) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 3655f01df3eccc3acdb69c97e41dec3a3ff24ca3333b88921cb12b5b6c342936 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-03 02:13:44,481 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 02:13:44,484 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 02:13:44,543 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 02:13:44,544 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 02:13:44,549 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 02:13:44,551 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 02:13:44,556 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 02:13:44,559 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 02:13:44,564 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 02:13:44,565 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 02:13:44,567 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 02:13:44,568 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 02:13:44,571 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 02:13:44,572 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 02:13:44,574 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 02:13:44,576 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 02:13:44,577 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 02:13:44,579 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 02:13:44,586 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 02:13:44,587 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 02:13:44,588 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 02:13:44,592 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 02:13:44,593 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 02:13:44,603 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 02:13:44,603 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 02:13:44,604 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 02:13:44,605 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 02:13:44,606 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 02:13:44,607 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 02:13:44,607 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 02:13:44,608 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 02:13:44,610 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 02:13:44,612 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 02:13:44,613 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 02:13:44,613 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 02:13:44,614 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 02:13:44,614 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 02:13:44,614 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 02:13:44,615 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 02:13:44,616 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 02:13:44,617 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5531f3bd-ba33-4048-8269-aa87440f1765/bin/utaipan-7li7fVZpFI/config/svcomp-DataRace-32bit-Taipan_Default.epf [2022-11-03 02:13:44,655 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 02:13:44,656 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 02:13:44,656 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 02:13:44,657 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 02:13:44,658 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 02:13:44,658 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 02:13:44,658 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 02:13:44,658 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 02:13:44,659 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 02:13:44,659 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 02:13:44,660 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 02:13:44,660 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 02:13:44,660 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 02:13:44,661 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 02:13:44,661 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 02:13:44,661 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 02:13:44,661 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 02:13:44,662 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 02:13:44,662 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 02:13:44,663 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 02:13:44,663 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-03 02:13:44,663 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 02:13:44,663 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 02:13:44,663 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 02:13:44,664 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 02:13:44,664 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 02:13:44,664 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 02:13:44,666 INFO L138 SettingsManager]: * Check absence of data races in concurrent programs=true [2022-11-03 02:13:44,666 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 02:13:44,666 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 02:13:44,666 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 02:13:44,667 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 02:13:44,667 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 02:13:44,667 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 02:13:44,667 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:13:44,668 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 02:13:44,668 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 02:13:44,668 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 02:13:44,668 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 02:13:44,669 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 02:13:44,669 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 02:13:44,669 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 02:13:44,669 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 02:13:44,669 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_5531f3bd-ba33-4048-8269-aa87440f1765/bin/utaipan-7li7fVZpFI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5531f3bd-ba33-4048-8269-aa87440f1765/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! data-race) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3655f01df3eccc3acdb69c97e41dec3a3ff24ca3333b88921cb12b5b6c342936 [2022-11-03 02:13:44,995 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 02:13:45,028 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 02:13:45,031 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 02:13:45,033 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 02:13:45,034 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 02:13:45,035 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5531f3bd-ba33-4048-8269-aa87440f1765/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/pthread-atomic/qrcu-1.i [2022-11-03 02:13:45,102 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5531f3bd-ba33-4048-8269-aa87440f1765/bin/utaipan-7li7fVZpFI/data/3d357f71c/9e1619331c794d96abd27ae3b8bbb3af/FLAG606ef3568 [2022-11-03 02:13:45,714 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 02:13:45,719 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5531f3bd-ba33-4048-8269-aa87440f1765/sv-benchmarks/c/pthread-atomic/qrcu-1.i [2022-11-03 02:13:45,743 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5531f3bd-ba33-4048-8269-aa87440f1765/bin/utaipan-7li7fVZpFI/data/3d357f71c/9e1619331c794d96abd27ae3b8bbb3af/FLAG606ef3568 [2022-11-03 02:13:45,957 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5531f3bd-ba33-4048-8269-aa87440f1765/bin/utaipan-7li7fVZpFI/data/3d357f71c/9e1619331c794d96abd27ae3b8bbb3af [2022-11-03 02:13:45,962 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 02:13:45,964 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 02:13:45,968 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 02:13:45,968 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 02:13:45,973 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 02:13:45,973 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:13:45" (1/1) ... [2022-11-03 02:13:45,976 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2282f7a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:13:45, skipping insertion in model container [2022-11-03 02:13:45,976 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:13:45" (1/1) ... [2022-11-03 02:13:45,983 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 02:13:46,051 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:13:46,557 WARN L230 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_5531f3bd-ba33-4048-8269-aa87440f1765/sv-benchmarks/c/pthread-atomic/qrcu-1.i[30694,30707] [2022-11-03 02:13:46,561 WARN L230 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_5531f3bd-ba33-4048-8269-aa87440f1765/sv-benchmarks/c/pthread-atomic/qrcu-1.i[30916,30929] [2022-11-03 02:13:46,603 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:13:46,615 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 02:13:46,654 WARN L230 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_5531f3bd-ba33-4048-8269-aa87440f1765/sv-benchmarks/c/pthread-atomic/qrcu-1.i[30694,30707] [2022-11-03 02:13:46,655 WARN L230 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_5531f3bd-ba33-4048-8269-aa87440f1765/sv-benchmarks/c/pthread-atomic/qrcu-1.i[30916,30929] [2022-11-03 02:13:46,673 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:13:46,709 INFO L208 MainTranslator]: Completed translation [2022-11-03 02:13:46,710 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:13:46 WrapperNode [2022-11-03 02:13:46,710 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 02:13:46,711 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 02:13:46,711 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 02:13:46,712 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 02:13:46,720 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:13:46" (1/1) ... [2022-11-03 02:13:46,745 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:13:46" (1/1) ... [2022-11-03 02:13:46,796 INFO L138 Inliner]: procedures = 177, calls = 54, calls flagged for inlining = 15, calls inlined = 17, statements flattened = 473 [2022-11-03 02:13:46,796 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 02:13:46,797 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 02:13:46,797 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 02:13:46,797 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 02:13:46,808 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:13:46" (1/1) ... [2022-11-03 02:13:46,808 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:13:46" (1/1) ... [2022-11-03 02:13:46,814 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:13:46" (1/1) ... [2022-11-03 02:13:46,815 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:13:46" (1/1) ... [2022-11-03 02:13:46,830 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:13:46" (1/1) ... [2022-11-03 02:13:46,847 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:13:46" (1/1) ... [2022-11-03 02:13:46,852 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:13:46" (1/1) ... [2022-11-03 02:13:46,855 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:13:46" (1/1) ... [2022-11-03 02:13:46,859 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 02:13:46,860 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 02:13:46,860 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 02:13:46,861 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 02:13:46,873 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:13:46" (1/1) ... [2022-11-03 02:13:46,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:13:46,913 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5531f3bd-ba33-4048-8269-aa87440f1765/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:13:46,932 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5531f3bd-ba33-4048-8269-aa87440f1765/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 02:13:46,935 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5531f3bd-ba33-4048-8269-aa87440f1765/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 02:13:46,977 INFO L130 BoogieDeclarations]: Found specification of procedure qrcu_reader1 [2022-11-03 02:13:46,977 INFO L138 BoogieDeclarations]: Found implementation of procedure qrcu_reader1 [2022-11-03 02:13:46,978 INFO L130 BoogieDeclarations]: Found specification of procedure qrcu_reader2 [2022-11-03 02:13:46,978 INFO L138 BoogieDeclarations]: Found implementation of procedure qrcu_reader2 [2022-11-03 02:13:46,978 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-03 02:13:46,978 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-03 02:13:46,979 INFO L130 BoogieDeclarations]: Found specification of procedure qrcu_updater [2022-11-03 02:13:46,979 INFO L138 BoogieDeclarations]: Found implementation of procedure qrcu_updater [2022-11-03 02:13:46,979 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-11-03 02:13:46,979 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 02:13:46,979 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-03 02:13:46,980 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-03 02:13:46,980 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 02:13:46,980 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 02:13:46,980 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 02:13:46,983 WARN L209 CfgBuilder]: User set CodeBlockSize to LoopFreeBlock but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-03 02:13:47,219 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 02:13:47,222 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 02:13:48,096 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 02:13:48,405 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 02:13:48,407 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-03 02:13:48,413 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:13:48 BoogieIcfgContainer [2022-11-03 02:13:48,413 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 02:13:48,417 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 02:13:48,418 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 02:13:48,422 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 02:13:48,423 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 02:13:45" (1/3) ... [2022-11-03 02:13:48,425 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3decd0ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:13:48, skipping insertion in model container [2022-11-03 02:13:48,426 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:13:46" (2/3) ... [2022-11-03 02:13:48,427 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3decd0ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:13:48, skipping insertion in model container [2022-11-03 02:13:48,427 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:13:48" (3/3) ... [2022-11-03 02:13:48,429 INFO L112 eAbstractionObserver]: Analyzing ICFG qrcu-1.i [2022-11-03 02:13:48,441 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-03 02:13:48,454 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 02:13:48,455 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 59 error locations. [2022-11-03 02:13:48,455 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-03 02:13:48,690 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-11-03 02:13:48,760 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-03 02:13:48,784 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 333 places, 341 transitions, 706 flow [2022-11-03 02:13:48,790 INFO L112 LiptonReduction]: Starting Lipton reduction on Petri net that has 333 places, 341 transitions, 706 flow [2022-11-03 02:13:48,792 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 333 places, 341 transitions, 706 flow [2022-11-03 02:13:48,971 INFO L130 PetriNetUnfolder]: 18/338 cut-off events. [2022-11-03 02:13:48,971 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-03 02:13:48,990 INFO L83 FinitePrefix]: Finished finitePrefix Result has 351 conditions, 338 events. 18/338 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1061 event pairs, 0 based on Foata normal form. 0/261 useless extension candidates. Maximal degree in co-relation 284. Up to 4 conditions per place. [2022-11-03 02:13:49,017 INFO L118 LiptonReduction]: Number of co-enabled transitions 47166 [2022-11-03 02:15:00,222 INFO L133 LiptonReduction]: Checked pairs total: 256274 [2022-11-03 02:15:00,222 INFO L135 LiptonReduction]: Total number of compositions: 301 [2022-11-03 02:15:00,236 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 185 places, 191 transitions, 406 flow [2022-11-03 02:15:22,390 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 546553 states, 533936 states have (on average 4.180418626951544) internal successors, (2232076), 546552 states have internal predecessors, (2232076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:15:22,427 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 02:15:22,438 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=LoopsAndPotentialCycles, 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;@5e427750, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 02:15:22,438 INFO L358 AbstractCegarLoop]: Starting to check reachability of 118 error locations. [2022-11-03 02:15:23,218 INFO L276 IsEmpty]: Start isEmpty. Operand has 546553 states, 533936 states have (on average 4.180418626951544) internal successors, (2232076), 546552 states have internal predecessors, (2232076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:15:23,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-03 02:15:23,224 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:15:23,225 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-03 02:15:23,226 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting qrcu_reader1Err2ASSERT_VIOLATIONDATA_RACE === [qrcu_reader1Err0ASSERT_VIOLATIONDATA_RACE, qrcu_reader1Err7ASSERT_VIOLATIONDATA_RACE, qrcu_reader1Err1ASSERT_VIOLATIONDATA_RACE (and 115 more)] === [2022-11-03 02:15:23,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:15:23,233 INFO L85 PathProgramCache]: Analyzing trace with hash 60074576, now seen corresponding path program 1 times [2022-11-03 02:15:23,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:15:23,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445317083] [2022-11-03 02:15:23,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:15:23,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:15:23,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:15:23,586 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:15:23,586 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:15:23,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445317083] [2022-11-03 02:15:23,588 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445317083] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:15:23,588 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:15:23,588 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-03 02:15:23,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835807080] [2022-11-03 02:15:23,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:15:23,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-03 02:15:23,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:15:23,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-03 02:15:23,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-03 02:15:24,737 INFO L87 Difference]: Start difference. First operand has 546553 states, 533936 states have (on average 4.180418626951544) internal successors, (2232076), 546552 states have internal predecessors, (2232076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 1 states have (on average 4.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:15:31,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:15:31,389 INFO L93 Difference]: Finished difference Result 204461 states and 821093 transitions. [2022-11-03 02:15:31,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-03 02:15:31,392 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 1 states have (on average 4.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-11-03 02:15:31,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:15:34,449 INFO L225 Difference]: With dead ends: 204461 [2022-11-03 02:15:34,450 INFO L226 Difference]: Without dead ends: 204460 [2022-11-03 02:15:34,451 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-03 02:15:34,454 INFO L413 NwaCegarLoop]: 87 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:15:34,456 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 87 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:15:35,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204460 states. [2022-11-03 02:15:45,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204460 to 204460. [2022-11-03 02:15:45,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204460 states, 203573 states have (on average 4.033398338679491) internal successors, (821091), 204459 states have internal predecessors, (821091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:15:48,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204460 states to 204460 states and 821091 transitions. [2022-11-03 02:15:48,767 INFO L78 Accepts]: Start accepts. Automaton has 204460 states and 821091 transitions. Word has length 4 [2022-11-03 02:15:48,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:15:48,768 INFO L495 AbstractCegarLoop]: Abstraction has 204460 states and 821091 transitions. [2022-11-03 02:15:48,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 1 states have (on average 4.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:15:48,769 INFO L276 IsEmpty]: Start isEmpty. Operand 204460 states and 821091 transitions. [2022-11-03 02:15:48,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-03 02:15:48,769 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:15:48,770 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-03 02:15:48,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 02:15:48,770 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting qrcu_reader1Err0ASSERT_VIOLATIONDATA_RACE === [qrcu_reader1Err0ASSERT_VIOLATIONDATA_RACE, qrcu_reader1Err7ASSERT_VIOLATIONDATA_RACE, qrcu_reader1Err1ASSERT_VIOLATIONDATA_RACE (and 115 more)] === [2022-11-03 02:15:48,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:15:48,771 INFO L85 PathProgramCache]: Analyzing trace with hash 1862307907, now seen corresponding path program 1 times [2022-11-03 02:15:48,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:15:48,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468836520] [2022-11-03 02:15:48,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:15:48,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:15:48,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:15:48,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:15:48,856 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:15:48,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468836520] [2022-11-03 02:15:48,856 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468836520] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:15:48,857 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:15:48,857 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 02:15:48,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649318067] [2022-11-03 02:15:48,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:15:48,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:15:48,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:15:48,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:15:48,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:15:48,861 INFO L87 Difference]: Start difference. First operand 204460 states and 821091 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:15:52,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:15:52,574 INFO L93 Difference]: Finished difference Result 234608 states and 928689 transitions. [2022-11-03 02:15:52,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:15:52,575 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-03 02:15:52,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted.