./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 2329fc70 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_e097d28f-264a-4a22-85df-ed4fa19e5d49/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e097d28f-264a-4a22-85df-ed4fa19e5d49/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e097d28f-264a-4a22-85df-ed4fa19e5d49/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e097d28f-264a-4a22-85df-ed4fa19e5d49/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/pthread-atomic/qrcu-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e097d28f-264a-4a22-85df-ed4fa19e5d49/bin/utaipan-gh47qXpMRh/config/svcomp-DataRace-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e097d28f-264a-4a22-85df-ed4fa19e5d49/bin/utaipan-gh47qXpMRh --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-2329fc7 [2022-12-14 13:51:37,099 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 13:51:37,100 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 13:51:37,118 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 13:51:37,118 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 13:51:37,119 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 13:51:37,120 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 13:51:37,122 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 13:51:37,123 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 13:51:37,124 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 13:51:37,125 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 13:51:37,126 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 13:51:37,126 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 13:51:37,127 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 13:51:37,128 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 13:51:37,129 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 13:51:37,130 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 13:51:37,131 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 13:51:37,132 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 13:51:37,134 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 13:51:37,135 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 13:51:37,136 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 13:51:37,137 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 13:51:37,138 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 13:51:37,141 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 13:51:37,142 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 13:51:37,142 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 13:51:37,143 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 13:51:37,143 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 13:51:37,144 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 13:51:37,144 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 13:51:37,145 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 13:51:37,146 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 13:51:37,146 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 13:51:37,147 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 13:51:37,147 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 13:51:37,148 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 13:51:37,148 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 13:51:37,148 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 13:51:37,149 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 13:51:37,150 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 13:51:37,150 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e097d28f-264a-4a22-85df-ed4fa19e5d49/bin/utaipan-gh47qXpMRh/config/svcomp-DataRace-32bit-Taipan_Default.epf [2022-12-14 13:51:37,170 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 13:51:37,170 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 13:51:37,170 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 13:51:37,171 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 13:51:37,171 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 13:51:37,171 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 13:51:37,172 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 13:51:37,172 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 13:51:37,172 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 13:51:37,172 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 13:51:37,172 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 13:51:37,173 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 13:51:37,173 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 13:51:37,173 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 13:51:37,173 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 13:51:37,173 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 13:51:37,173 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 13:51:37,174 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 13:51:37,174 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 13:51:37,175 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 13:51:37,175 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-14 13:51:37,175 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 13:51:37,175 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 13:51:37,175 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 13:51:37,175 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 13:51:37,175 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 13:51:37,176 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 13:51:37,176 INFO L138 SettingsManager]: * Check absence of data races in concurrent programs=true [2022-12-14 13:51:37,176 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 13:51:37,176 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 13:51:37,176 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 13:51:37,176 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 13:51:37,177 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 13:51:37,177 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 13:51:37,177 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 13:51:37,177 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 13:51:37,177 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 13:51:37,177 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 13:51:37,178 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 13:51:37,178 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 13:51:37,178 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 13:51:37,178 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 13:51:37,178 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 13:51:37,178 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_e097d28f-264a-4a22-85df-ed4fa19e5d49/bin/utaipan-gh47qXpMRh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e097d28f-264a-4a22-85df-ed4fa19e5d49/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! data-race) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3655f01df3eccc3acdb69c97e41dec3a3ff24ca3333b88921cb12b5b6c342936 [2022-12-14 13:51:37,362 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 13:51:37,382 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 13:51:37,385 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 13:51:37,386 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 13:51:37,386 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 13:51:37,387 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e097d28f-264a-4a22-85df-ed4fa19e5d49/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/pthread-atomic/qrcu-1.i [2022-12-14 13:51:39,951 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 13:51:40,170 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 13:51:40,170 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e097d28f-264a-4a22-85df-ed4fa19e5d49/sv-benchmarks/c/pthread-atomic/qrcu-1.i [2022-12-14 13:51:40,181 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e097d28f-264a-4a22-85df-ed4fa19e5d49/bin/utaipan-gh47qXpMRh/data/00b781407/dd6f8ec9ddd24a418a7811bec7612ebc/FLAGd15705ee9 [2022-12-14 13:51:40,512 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e097d28f-264a-4a22-85df-ed4fa19e5d49/bin/utaipan-gh47qXpMRh/data/00b781407/dd6f8ec9ddd24a418a7811bec7612ebc [2022-12-14 13:51:40,514 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 13:51:40,515 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 13:51:40,515 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 13:51:40,515 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 13:51:40,518 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 13:51:40,519 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 01:51:40" (1/1) ... [2022-12-14 13:51:40,520 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3ae46b47 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:51:40, skipping insertion in model container [2022-12-14 13:51:40,520 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 01:51:40" (1/1) ... [2022-12-14 13:51:40,526 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 13:51:40,551 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 13:51:40,759 WARN L237 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_e097d28f-264a-4a22-85df-ed4fa19e5d49/sv-benchmarks/c/pthread-atomic/qrcu-1.i[30694,30707] [2022-12-14 13:51:40,761 WARN L237 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_e097d28f-264a-4a22-85df-ed4fa19e5d49/sv-benchmarks/c/pthread-atomic/qrcu-1.i[30916,30929] [2022-12-14 13:51:40,775 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 13:51:40,783 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 13:51:40,808 WARN L237 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_e097d28f-264a-4a22-85df-ed4fa19e5d49/sv-benchmarks/c/pthread-atomic/qrcu-1.i[30694,30707] [2022-12-14 13:51:40,809 WARN L237 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_e097d28f-264a-4a22-85df-ed4fa19e5d49/sv-benchmarks/c/pthread-atomic/qrcu-1.i[30916,30929] [2022-12-14 13:51:40,819 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 13:51:40,840 INFO L208 MainTranslator]: Completed translation [2022-12-14 13:51:40,841 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:51:40 WrapperNode [2022-12-14 13:51:40,841 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 13:51:40,842 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 13:51:40,842 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 13:51:40,842 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 13:51:40,847 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:51:40" (1/1) ... [2022-12-14 13:51:40,858 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:51:40" (1/1) ... [2022-12-14 13:51:40,881 INFO L138 Inliner]: procedures = 177, calls = 54, calls flagged for inlining = 15, calls inlined = 17, statements flattened = 473 [2022-12-14 13:51:40,881 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 13:51:40,882 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 13:51:40,882 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 13:51:40,882 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 13:51:40,889 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:51:40" (1/1) ... [2022-12-14 13:51:40,889 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:51:40" (1/1) ... [2022-12-14 13:51:40,893 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:51:40" (1/1) ... [2022-12-14 13:51:40,893 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:51:40" (1/1) ... [2022-12-14 13:51:40,902 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:51:40" (1/1) ... [2022-12-14 13:51:40,906 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:51:40" (1/1) ... [2022-12-14 13:51:40,908 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:51:40" (1/1) ... [2022-12-14 13:51:40,909 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:51:40" (1/1) ... [2022-12-14 13:51:40,912 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 13:51:40,913 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 13:51:40,913 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 13:51:40,913 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 13:51:40,914 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:51:40" (1/1) ... [2022-12-14 13:51:40,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 13:51:40,928 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e097d28f-264a-4a22-85df-ed4fa19e5d49/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:51:40,939 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e097d28f-264a-4a22-85df-ed4fa19e5d49/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 13:51:40,941 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e097d28f-264a-4a22-85df-ed4fa19e5d49/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 13:51:40,977 INFO L130 BoogieDeclarations]: Found specification of procedure qrcu_reader1 [2022-12-14 13:51:40,977 INFO L138 BoogieDeclarations]: Found implementation of procedure qrcu_reader1 [2022-12-14 13:51:40,978 INFO L130 BoogieDeclarations]: Found specification of procedure qrcu_reader2 [2022-12-14 13:51:40,978 INFO L138 BoogieDeclarations]: Found implementation of procedure qrcu_reader2 [2022-12-14 13:51:40,978 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-14 13:51:40,978 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-14 13:51:40,978 INFO L130 BoogieDeclarations]: Found specification of procedure qrcu_updater [2022-12-14 13:51:40,978 INFO L138 BoogieDeclarations]: Found implementation of procedure qrcu_updater [2022-12-14 13:51:40,979 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-12-14 13:51:40,979 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 13:51:40,979 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-14 13:51:40,979 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-14 13:51:40,979 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 13:51:40,979 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 13:51:40,979 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 13:51:40,981 WARN L209 CfgBuilder]: User set CodeBlockSize to LoopFreeBlock but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-12-14 13:51:41,091 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 13:51:41,093 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 13:51:41,566 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 13:51:41,767 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 13:51:41,768 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-12-14 13:51:41,769 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 01:51:41 BoogieIcfgContainer [2022-12-14 13:51:41,770 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 13:51:41,771 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 13:51:41,771 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 13:51:41,773 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 13:51:41,774 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 01:51:40" (1/3) ... [2022-12-14 13:51:41,774 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@265812c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 01:51:41, skipping insertion in model container [2022-12-14 13:51:41,774 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:51:40" (2/3) ... [2022-12-14 13:51:41,774 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@265812c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 01:51:41, skipping insertion in model container [2022-12-14 13:51:41,774 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 01:51:41" (3/3) ... [2022-12-14 13:51:41,775 INFO L112 eAbstractionObserver]: Analyzing ICFG qrcu-1.i [2022-12-14 13:51:41,782 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-12-14 13:51:41,790 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 13:51:41,790 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 59 error locations. [2022-12-14 13:51:41,790 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-14 13:51:41,866 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-12-14 13:51:41,891 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-14 13:51:41,901 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 333 places, 341 transitions, 706 flow [2022-12-14 13:51:41,903 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 333 places, 341 transitions, 706 flow [2022-12-14 13:51:41,904 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 333 places, 341 transitions, 706 flow [2022-12-14 13:51:42,007 INFO L130 PetriNetUnfolder]: 18/338 cut-off events. [2022-12-14 13:51:42,008 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-12-14 13:51:42,015 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 1060 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. [2022-12-14 13:51:42,027 INFO L119 LiptonReduction]: Number of co-enabled transitions 47166 [2022-12-14 13:52:00,525 INFO L134 LiptonReduction]: Checked pairs total: 258829 [2022-12-14 13:52:00,526 INFO L136 LiptonReduction]: Total number of compositions: 285 [2022-12-14 13:52:00,531 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 185 places, 191 transitions, 406 flow [2022-12-14 13:52:10,329 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) [2022-12-14 13:52:10,346 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 13:52:10,351 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;@5f0fa053, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 13:52:10,351 INFO L358 AbstractCegarLoop]: Starting to check reachability of 118 error locations. [2022-12-14 13:52:11,038 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) [2022-12-14 13:52:11,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-12-14 13:52:11,043 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:52:11,043 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-12-14 13:52:11,044 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting qrcu_reader1Err4ASSERT_VIOLATIONDATA_RACE === [qrcu_reader1Err0ASSERT_VIOLATIONDATA_RACE, qrcu_reader1Err7ASSERT_VIOLATIONDATA_RACE, qrcu_reader1Err1ASSERT_VIOLATIONDATA_RACE (and 115 more)] === [2022-12-14 13:52:11,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:52:11,048 INFO L85 PathProgramCache]: Analyzing trace with hash 59805621, now seen corresponding path program 1 times [2022-12-14 13:52:11,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:52:11,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895159793] [2022-12-14 13:52:11,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:52:11,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:52:11,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:52:11,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:52:11,224 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:52:11,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895159793] [2022-12-14 13:52:11,225 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895159793] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:52:11,225 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:52:11,225 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 13:52:11,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960350895] [2022-12-14 13:52:11,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:52:11,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-12-14 13:52:11,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:52:11,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-12-14 13:52:11,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-14 13:52:12,002 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) [2022-12-14 13:52:14,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:52:14,657 INFO L93 Difference]: Finished difference Result 204461 states and 821093 transitions. [2022-12-14 13:52:14,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-12-14 13:52:14,659 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 [2022-12-14 13:52:14,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:52:16,023 INFO L225 Difference]: With dead ends: 204461 [2022-12-14 13:52:16,024 INFO L226 Difference]: Without dead ends: 204460 [2022-12-14 13:52:16,025 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 [2022-12-14 13:52:16,028 INFO L413 NwaCegarLoop]: 84 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:52:16,029 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 84 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:52:16,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204460 states. [2022-12-14 13:52:21,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204460 to 204460. [2022-12-14 13:52:21,587 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) [2022-12-14 13:52:22,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204460 states to 204460 states and 821091 transitions. [2022-12-14 13:52:22,900 INFO L78 Accepts]: Start accepts. Automaton has 204460 states and 821091 transitions. Word has length 4 [2022-12-14 13:52:22,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:52:22,901 INFO L495 AbstractCegarLoop]: Abstraction has 204460 states and 821091 transitions. [2022-12-14 13:52:22,901 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) [2022-12-14 13:52:22,901 INFO L276 IsEmpty]: Start isEmpty. Operand 204460 states and 821091 transitions. [2022-12-14 13:52:22,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-12-14 13:52:22,901 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:52:22,901 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-12-14 13:52:22,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 13:52:22,902 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)] === [2022-12-14 13:52:22,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:52:22,902 INFO L85 PathProgramCache]: Analyzing trace with hash 1853970456, now seen corresponding path program 1 times [2022-12-14 13:52:22,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:52:22,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016339074] [2022-12-14 13:52:22,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:52:22,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:52:22,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:52:22,971 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:52:22,972 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:52:22,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016339074] [2022-12-14 13:52:22,972 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016339074] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:52:22,972 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:52:22,972 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 13:52:22,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746413344] [2022-12-14 13:52:22,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:52:22,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:52:22,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:52:22,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:52:22,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 13:52:22,975 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) [2022-12-14 13:52:25,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:52:25,119 INFO L93 Difference]: Finished difference Result 234608 states and 928689 transitions. [2022-12-14 13:52:25,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:52:25,119 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 [2022-12-14 13:52:25,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:52:26,542 INFO L225 Difference]: With dead ends: 234608 [2022-12-14 13:52:26,542 INFO L226 Difference]: Without dead ends: 234608 [2022-12-14 13:52:26,542 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 13:52:26,544 INFO L413 NwaCegarLoop]: 122 mSDtfsCounter, 143 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 13:52:26,544 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 184 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 13:52:26,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234608 states. [2022-12-14 13:52:31,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234608 to 194864. [2022-12-14 13:52:31,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194864 states, 194194 states have (on average 3.9977342245383483) internal successors, (776336), 194863 states have internal predecessors, (776336), 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) [2022-12-14 13:52:32,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194864 states to 194864 states and 776336 transitions. [2022-12-14 13:52:32,913 INFO L78 Accepts]: Start accepts. Automaton has 194864 states and 776336 transitions. Word has length 5 [2022-12-14 13:52:32,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:52:32,913 INFO L495 AbstractCegarLoop]: Abstraction has 194864 states and 776336 transitions. [2022-12-14 13:52:32,913 INFO L496 AbstractCegarLoop]: INTERPOLANT 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) [2022-12-14 13:52:32,914 INFO L276 IsEmpty]: Start isEmpty. Operand 194864 states and 776336 transitions. [2022-12-14 13:52:32,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-12-14 13:52:32,914 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:52:32,914 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:52:32,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 13:52:32,915 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting qrcu_updaterErr4ASSERT_VIOLATIONDATA_RACE === [qrcu_reader1Err0ASSERT_VIOLATIONDATA_RACE, qrcu_reader1Err7ASSERT_VIOLATIONDATA_RACE, qrcu_reader1Err1ASSERT_VIOLATIONDATA_RACE (and 115 more)] === [2022-12-14 13:52:32,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:52:32,915 INFO L85 PathProgramCache]: Analyzing trace with hash -1471900262, now seen corresponding path program 1 times [2022-12-14 13:52:32,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:52:32,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64070340] [2022-12-14 13:52:32,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:52:32,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:52:32,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:52:32,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:52:32,988 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:52:32,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64070340] [2022-12-14 13:52:32,989 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64070340] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:52:32,989 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:52:32,989 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 13:52:32,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480413108] [2022-12-14 13:52:32,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:52:32,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:52:32,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:52:32,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:52:32,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 13:52:32,990 INFO L87 Difference]: Start difference. First operand 194864 states and 776336 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 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) [2022-12-14 13:52:35,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:52:35,774 INFO L93 Difference]: Finished difference Result 296070 states and 1170083 transitions. [2022-12-14 13:52:35,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:52:35,774 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 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 8 [2022-12-14 13:52:35,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:52:37,319 INFO L225 Difference]: With dead ends: 296070 [2022-12-14 13:52:37,319 INFO L226 Difference]: Without dead ends: 296070 [2022-12-14 13:52:37,320 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 13:52:37,320 INFO L413 NwaCegarLoop]: 108 mSDtfsCounter, 102 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 13:52:37,321 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 174 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 13:52:38,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296070 states. [2022-12-14 13:52:43,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296070 to 206312. [2022-12-14 13:52:43,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206312 states, 205646 states have (on average 3.991456191708081) internal successors, (820827), 206311 states have internal predecessors, (820827), 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) [2022-12-14 13:52:44,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206312 states to 206312 states and 820827 transitions. [2022-12-14 13:52:44,681 INFO L78 Accepts]: Start accepts. Automaton has 206312 states and 820827 transitions. Word has length 8 [2022-12-14 13:52:44,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:52:44,682 INFO L495 AbstractCegarLoop]: Abstraction has 206312 states and 820827 transitions. [2022-12-14 13:52:44,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 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) [2022-12-14 13:52:44,682 INFO L276 IsEmpty]: Start isEmpty. Operand 206312 states and 820827 transitions. [2022-12-14 13:52:44,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-12-14 13:52:44,683 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:52:44,683 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:52:44,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-14 13:52:44,683 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting qrcu_updaterErr6ASSERT_VIOLATIONDATA_RACE === [qrcu_reader1Err0ASSERT_VIOLATIONDATA_RACE, qrcu_reader1Err7ASSERT_VIOLATIONDATA_RACE, qrcu_reader1Err1ASSERT_VIOLATIONDATA_RACE (and 115 more)] === [2022-12-14 13:52:44,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:52:44,684 INFO L85 PathProgramCache]: Analyzing trace with hash -1471900105, now seen corresponding path program 1 times [2022-12-14 13:52:44,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:52:44,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10617142] [2022-12-14 13:52:44,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:52:44,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:52:44,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:52:44,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:52:44,719 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:52:44,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10617142] [2022-12-14 13:52:44,719 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10617142] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:52:44,719 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:52:44,719 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 13:52:44,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703277358] [2022-12-14 13:52:44,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:52:44,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:52:44,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:52:44,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:52:44,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 13:52:44,721 INFO L87 Difference]: Start difference. First operand 206312 states and 820827 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 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) [2022-12-14 13:52:47,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:52:47,206 INFO L93 Difference]: Finished difference Result 306846 states and 1210534 transitions. [2022-12-14 13:52:47,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:52:47,207 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 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 8 [2022-12-14 13:52:47,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:52:49,085 INFO L225 Difference]: With dead ends: 306846 [2022-12-14 13:52:49,085 INFO L226 Difference]: Without dead ends: 306846 [2022-12-14 13:52:49,086 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 13:52:49,086 INFO L413 NwaCegarLoop]: 106 mSDtfsCounter, 102 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:52:49,087 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 172 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:52:49,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306846 states. [2022-12-14 13:52:55,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306846 to 217760. [2022-12-14 13:52:55,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217760 states, 217098 states have (on average 3.9858404959971994) internal successors, (865318), 217759 states have internal predecessors, (865318), 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) [2022-12-14 13:52:56,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217760 states to 217760 states and 865318 transitions. [2022-12-14 13:52:56,467 INFO L78 Accepts]: Start accepts. Automaton has 217760 states and 865318 transitions. Word has length 8 [2022-12-14 13:52:56,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:52:56,468 INFO L495 AbstractCegarLoop]: Abstraction has 217760 states and 865318 transitions. [2022-12-14 13:52:56,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 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) [2022-12-14 13:52:56,468 INFO L276 IsEmpty]: Start isEmpty. Operand 217760 states and 865318 transitions. [2022-12-14 13:52:56,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-12-14 13:52:56,469 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:52:56,469 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:52:56,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-14 13:52:56,469 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting qrcu_reader1Err7ASSERT_VIOLATIONDATA_RACE === [qrcu_reader1Err0ASSERT_VIOLATIONDATA_RACE, qrcu_reader1Err7ASSERT_VIOLATIONDATA_RACE, qrcu_reader1Err1ASSERT_VIOLATIONDATA_RACE (and 115 more)] === [2022-12-14 13:52:56,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:52:56,470 INFO L85 PathProgramCache]: Analyzing trace with hash 914808396, now seen corresponding path program 1 times [2022-12-14 13:52:56,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:52:56,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306337052] [2022-12-14 13:52:56,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:52:56,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:52:56,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:52:56,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:52:56,507 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:52:56,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306337052] [2022-12-14 13:52:56,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306337052] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:52:56,507 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:52:56,507 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 13:52:56,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583395633] [2022-12-14 13:52:56,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:52:56,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:52:56,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:52:56,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:52:56,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 13:52:56,508 INFO L87 Difference]: Start difference. First operand 217760 states and 865318 transitions. Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 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) [2022-12-14 13:52:58,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:52:58,396 INFO L93 Difference]: Finished difference Result 218840 states and 856825 transitions. [2022-12-14 13:52:58,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:52:58,397 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 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 10 [2022-12-14 13:52:58,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:52:59,441 INFO L225 Difference]: With dead ends: 218840 [2022-12-14 13:52:59,441 INFO L226 Difference]: Without dead ends: 218838 [2022-12-14 13:52:59,441 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 13:52:59,442 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 92 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:52:59,442 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 158 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:52:59,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218838 states. [2022-12-14 13:53:04,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218838 to 210038. [2022-12-14 13:53:04,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210038 states, 209339 states have (on average 3.933891916938554) internal successors, (823517), 210037 states have internal predecessors, (823517), 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) [2022-12-14 13:53:05,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210038 states to 210038 states and 823517 transitions. [2022-12-14 13:53:05,835 INFO L78 Accepts]: Start accepts. Automaton has 210038 states and 823517 transitions. Word has length 10 [2022-12-14 13:53:05,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:53:05,835 INFO L495 AbstractCegarLoop]: Abstraction has 210038 states and 823517 transitions. [2022-12-14 13:53:05,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 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) [2022-12-14 13:53:05,836 INFO L276 IsEmpty]: Start isEmpty. Operand 210038 states and 823517 transitions. [2022-12-14 13:53:05,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-12-14 13:53:05,836 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:53:05,836 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:53:05,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-14 13:53:05,837 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting qrcu_reader1Err7ASSERT_VIOLATIONDATA_RACE === [qrcu_reader1Err0ASSERT_VIOLATIONDATA_RACE, qrcu_reader1Err7ASSERT_VIOLATIONDATA_RACE, qrcu_reader1Err1ASSERT_VIOLATIONDATA_RACE (and 115 more)] === [2022-12-14 13:53:05,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:53:05,837 INFO L85 PathProgramCache]: Analyzing trace with hash 767760020, now seen corresponding path program 1 times [2022-12-14 13:53:05,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:53:05,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811017184] [2022-12-14 13:53:05,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:53:05,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:53:05,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:53:05,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:53:05,868 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:53:05,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811017184] [2022-12-14 13:53:05,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811017184] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:53:05,868 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:53:05,868 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 13:53:05,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928467623] [2022-12-14 13:53:05,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:53:05,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:53:05,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:53:05,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:53:05,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 13:53:05,870 INFO L87 Difference]: Start difference. First operand 210038 states and 823517 transitions. Second operand has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 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) [2022-12-14 13:53:07,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:53:07,698 INFO L93 Difference]: Finished difference Result 230628 states and 904727 transitions. [2022-12-14 13:53:07,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:53:07,698 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 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 10 [2022-12-14 13:53:07,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:53:09,016 INFO L225 Difference]: With dead ends: 230628 [2022-12-14 13:53:09,016 INFO L226 Difference]: Without dead ends: 230628 [2022-12-14 13:53:09,016 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 13:53:09,017 INFO L413 NwaCegarLoop]: 147 mSDtfsCounter, 116 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 13:53:09,017 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 227 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 13:53:09,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230628 states.