./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-data-race.prp --file ../../sv-benchmarks/c/pthread-atomic/qrcu-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for data races Using default analysis Version cf1a7837 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_e2191914-fc28-4821-bf28-beca22b49aa3/bin/utaipan-verify-NcY6lQBIFX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2191914-fc28-4821-bf28-beca22b49aa3/bin/utaipan-verify-NcY6lQBIFX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2191914-fc28-4821-bf28-beca22b49aa3/bin/utaipan-verify-NcY6lQBIFX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2191914-fc28-4821-bf28-beca22b49aa3/bin/utaipan-verify-NcY6lQBIFX/config/TaipanReach.xml -i ../../sv-benchmarks/c/pthread-atomic/qrcu-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2191914-fc28-4821-bf28-beca22b49aa3/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-DataRace-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2191914-fc28-4821-bf28-beca22b49aa3/bin/utaipan-verify-NcY6lQBIFX --witnessprinter.witness.filename witness --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 d1980d3c26a5811df2d100379a9d31e1e9ec963bc59bfe660be33ada51bfb014 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 01:03:03,620 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 01:03:03,723 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2191914-fc28-4821-bf28-beca22b49aa3/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-DataRace-32bit-Taipan_Default.epf [2023-11-12 01:03:03,730 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 01:03:03,731 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 01:03:03,758 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 01:03:03,759 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 01:03:03,760 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 01:03:03,761 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 01:03:03,761 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 01:03:03,762 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-12 01:03:03,763 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-12 01:03:03,763 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-12 01:03:03,764 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-12 01:03:03,764 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-12 01:03:03,765 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-12 01:03:03,765 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-12 01:03:03,766 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-12 01:03:03,767 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-12 01:03:03,767 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-12 01:03:03,768 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-12 01:03:03,768 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-12 01:03:03,769 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 01:03:03,770 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 01:03:03,770 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 01:03:03,771 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 01:03:03,771 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 01:03:03,772 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 01:03:03,772 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 01:03:03,772 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 01:03:03,773 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 01:03:03,773 INFO L153 SettingsManager]: * Check absence of data races in concurrent programs=true [2023-11-12 01:03:03,774 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-12 01:03:03,774 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 01:03:03,774 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 01:03:03,775 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 01:03:03,775 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 01:03:03,775 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 01:03:03,775 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 01:03:03,776 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 01:03:03,776 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 01:03:03,777 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 01:03:03,777 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-12 01:03:03,777 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 01:03:03,777 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 01:03:03,778 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-12 01:03:03,778 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 01:03:03,778 INFO L153 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2191914-fc28-4821-bf28-beca22b49aa3/bin/utaipan-verify-NcY6lQBIFX/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2191914-fc28-4821-bf28-beca22b49aa3/bin/utaipan-verify-NcY6lQBIFX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! data-race) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d1980d3c26a5811df2d100379a9d31e1e9ec963bc59bfe660be33ada51bfb014 [2023-11-12 01:03:04,054 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 01:03:04,089 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 01:03:04,092 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 01:03:04,094 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 01:03:04,095 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 01:03:04,096 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2191914-fc28-4821-bf28-beca22b49aa3/bin/utaipan-verify-NcY6lQBIFX/../../sv-benchmarks/c/pthread-atomic/qrcu-2.i [2023-11-12 01:03:07,260 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 01:03:07,575 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 01:03:07,575 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2191914-fc28-4821-bf28-beca22b49aa3/sv-benchmarks/c/pthread-atomic/qrcu-2.i [2023-11-12 01:03:07,592 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2191914-fc28-4821-bf28-beca22b49aa3/bin/utaipan-verify-NcY6lQBIFX/data/3fa04522d/1ad9790c5edf4afea4fc83db28e208ee/FLAG83424c0cd [2023-11-12 01:03:07,614 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2191914-fc28-4821-bf28-beca22b49aa3/bin/utaipan-verify-NcY6lQBIFX/data/3fa04522d/1ad9790c5edf4afea4fc83db28e208ee [2023-11-12 01:03:07,617 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 01:03:07,618 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 01:03:07,620 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 01:03:07,620 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 01:03:07,631 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 01:03:07,632 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 01:03:07" (1/1) ... [2023-11-12 01:03:07,633 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71c3ca2c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:03:07, skipping insertion in model container [2023-11-12 01:03:07,633 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 01:03:07" (1/1) ... [2023-11-12 01:03:07,693 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 01:03:08,049 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 01:03:08,063 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 01:03:08,124 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 01:03:08,186 INFO L206 MainTranslator]: Completed translation [2023-11-12 01:03:08,186 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:03:08 WrapperNode [2023-11-12 01:03:08,186 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 01:03:08,188 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 01:03:08,188 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 01:03:08,188 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 01:03:08,196 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:03:08" (1/1) ... [2023-11-12 01:03:08,236 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:03:08" (1/1) ... [2023-11-12 01:03:08,308 INFO L138 Inliner]: procedures = 177, calls = 46, calls flagged for inlining = 17, calls inlined = 19, statements flattened = 456 [2023-11-12 01:03:08,309 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 01:03:08,310 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 01:03:08,310 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 01:03:08,310 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 01:03:08,346 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:03:08" (1/1) ... [2023-11-12 01:03:08,346 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:03:08" (1/1) ... [2023-11-12 01:03:08,368 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:03:08" (1/1) ... [2023-11-12 01:03:08,368 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:03:08" (1/1) ... [2023-11-12 01:03:08,382 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:03:08" (1/1) ... [2023-11-12 01:03:08,422 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:03:08" (1/1) ... [2023-11-12 01:03:08,426 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:03:08" (1/1) ... [2023-11-12 01:03:08,441 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:03:08" (1/1) ... [2023-11-12 01:03:08,446 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 01:03:08,447 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 01:03:08,447 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 01:03:08,447 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 01:03:08,448 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:03:08" (1/1) ... [2023-11-12 01:03:08,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 01:03:08,478 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2191914-fc28-4821-bf28-beca22b49aa3/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 01:03:08,493 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2191914-fc28-4821-bf28-beca22b49aa3/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 01:03:08,528 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2191914-fc28-4821-bf28-beca22b49aa3/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 01:03:08,541 INFO L130 BoogieDeclarations]: Found specification of procedure qrcu_reader1 [2023-11-12 01:03:08,542 INFO L138 BoogieDeclarations]: Found implementation of procedure qrcu_reader1 [2023-11-12 01:03:08,542 INFO L130 BoogieDeclarations]: Found specification of procedure qrcu_reader2 [2023-11-12 01:03:08,542 INFO L138 BoogieDeclarations]: Found implementation of procedure qrcu_reader2 [2023-11-12 01:03:08,542 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-12 01:03:08,543 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-12 01:03:08,543 INFO L130 BoogieDeclarations]: Found specification of procedure qrcu_updater [2023-11-12 01:03:08,545 INFO L138 BoogieDeclarations]: Found implementation of procedure qrcu_updater [2023-11-12 01:03:08,545 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-12 01:03:08,546 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 01:03:08,546 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-12 01:03:08,546 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-12 01:03:08,546 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 01:03:08,547 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 01:03:08,547 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 01:03:08,549 WARN L210 CfgBuilder]: User set CodeBlockSize to LoopFreeBlock but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-12 01:03:08,805 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 01:03:08,807 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 01:03:09,536 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 01:03:09,920 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 01:03:09,921 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-12 01:03:09,925 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 01:03:09 BoogieIcfgContainer [2023-11-12 01:03:09,925 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 01:03:09,931 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 01:03:09,932 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 01:03:09,936 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 01:03:09,936 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 01:03:07" (1/3) ... [2023-11-12 01:03:09,937 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@517e968a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 01:03:09, skipping insertion in model container [2023-11-12 01:03:09,938 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:03:08" (2/3) ... [2023-11-12 01:03:09,940 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@517e968a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 01:03:09, skipping insertion in model container [2023-11-12 01:03:09,940 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 01:03:09" (3/3) ... [2023-11-12 01:03:09,948 INFO L112 eAbstractionObserver]: Analyzing ICFG qrcu-2.i [2023-11-12 01:03:09,961 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-12 01:03:09,974 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 01:03:09,975 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 55 error locations. [2023-11-12 01:03:09,975 INFO L521 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-12 01:03:10,144 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-12 01:03:10,191 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-12 01:03:10,217 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 319 places, 327 transitions, 675 flow [2023-11-12 01:03:10,219 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 319 places, 327 transitions, 675 flow [2023-11-12 01:03:10,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 319 places, 327 transitions, 675 flow [2023-11-12 01:03:10,400 INFO L124 PetriNetUnfolderBase]: 18/324 cut-off events. [2023-11-12 01:03:10,400 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-12 01:03:10,413 INFO L83 FinitePrefix]: Finished finitePrefix Result has 337 conditions, 324 events. 18/324 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 971 event pairs, 0 based on Foata normal form. 0/251 useless extension candidates. Maximal degree in co-relation 274. Up to 4 conditions per place. [2023-11-12 01:03:10,444 INFO L119 LiptonReduction]: Number of co-enabled transitions 45582 [2023-11-12 01:03:21,814 INFO L134 LiptonReduction]: Checked pairs total: 149064 [2023-11-12 01:03:21,814 INFO L136 LiptonReduction]: Total number of compositions: 286 [2023-11-12 01:03:21,827 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 156 places, 162 transitions, 345 flow [2023-11-12 01:03:28,294 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 161565 states, 150577 states have (on average 4.185307185028258) internal successors, (630211), 161564 states have internal predecessors, (630211), 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) [2023-11-12 01:03:28,320 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 01:03:28,328 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@6540866f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-12 01:03:28,328 INFO L358 AbstractCegarLoop]: Starting to check reachability of 110 error locations. [2023-11-12 01:03:28,522 INFO L276 IsEmpty]: Start isEmpty. Operand has 161565 states, 150577 states have (on average 4.185307185028258) internal successors, (630211), 161564 states have internal predecessors, (630211), 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) [2023-11-12 01:03:28,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-11-12 01:03:28,528 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:03:28,529 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-11-12 01:03:28,530 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting qrcu_reader1Err1ASSERT_VIOLATIONDATA_RACE === [qrcu_reader1Err0ASSERT_VIOLATIONDATA_RACE, qrcu_reader1Err7ASSERT_VIOLATIONDATA_RACE, qrcu_reader1Err1ASSERT_VIOLATIONDATA_RACE (and 107 more)] === [2023-11-12 01:03:28,536 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:03:28,537 INFO L85 PathProgramCache]: Analyzing trace with hash 58662987, now seen corresponding path program 1 times [2023-11-12 01:03:28,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:03:28,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339763007] [2023-11-12 01:03:28,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:03:28,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:03:28,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:03:28,816 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:03:28,817 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:03:28,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339763007] [2023-11-12 01:03:28,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339763007] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:03:28,819 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 01:03:28,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-12 01:03:28,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374838810] [2023-11-12 01:03:28,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:03:28,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-12 01:03:28,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:03:28,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-12 01:03:28,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-12 01:03:29,190 INFO L87 Difference]: Start difference. First operand has 161565 states, 150577 states have (on average 4.185307185028258) internal successors, (630211), 161564 states have internal predecessors, (630211), 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) [2023-11-12 01:03:31,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:03:31,096 INFO L93 Difference]: Finished difference Result 38401 states and 141164 transitions. [2023-11-12 01:03:31,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-12 01:03:31,107 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 [2023-11-12 01:03:31,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:03:31,644 INFO L225 Difference]: With dead ends: 38401 [2023-11-12 01:03:31,644 INFO L226 Difference]: Without dead ends: 38346 [2023-11-12 01:03:31,645 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 [2023-11-12 01:03:31,650 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 01:03:31,652 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 56 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 01:03:32,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38346 states. [2023-11-12 01:03:33,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38346 to 38346. [2023-11-12 01:03:33,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38346 states, 37995 states have (on average 3.7100144755888933) internal successors, (140962), 38345 states have internal predecessors, (140962), 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) [2023-11-12 01:03:34,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38346 states to 38346 states and 140962 transitions. [2023-11-12 01:03:34,254 INFO L78 Accepts]: Start accepts. Automaton has 38346 states and 140962 transitions. Word has length 4 [2023-11-12 01:03:34,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:03:34,255 INFO L495 AbstractCegarLoop]: Abstraction has 38346 states and 140962 transitions. [2023-11-12 01:03:34,255 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) [2023-11-12 01:03:34,256 INFO L276 IsEmpty]: Start isEmpty. Operand 38346 states and 140962 transitions. [2023-11-12 01:03:34,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-12 01:03:34,257 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:03:34,258 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-11-12 01:03:34,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 01:03:34,259 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting qrcu_reader1Err0ASSERT_VIOLATIONDATA_RACE === [qrcu_reader1Err0ASSERT_VIOLATIONDATA_RACE, qrcu_reader1Err7ASSERT_VIOLATIONDATA_RACE, qrcu_reader1Err1ASSERT_VIOLATIONDATA_RACE (and 107 more)] === [2023-11-12 01:03:34,259 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:03:34,260 INFO L85 PathProgramCache]: Analyzing trace with hash 1818548401, now seen corresponding path program 1 times [2023-11-12 01:03:34,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:03:34,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533389533] [2023-11-12 01:03:34,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:03:34,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:03:34,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:03:34,342 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:03:34,343 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:03:34,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533389533] [2023-11-12 01:03:34,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533389533] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:03:34,343 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 01:03:34,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 01:03:34,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048003876] [2023-11-12 01:03:34,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:03:34,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 01:03:34,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:03:34,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 01:03:34,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 01:03:34,347 INFO L87 Difference]: Start difference. First operand 38346 states and 140962 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) [2023-11-12 01:03:35,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:03:35,426 INFO L93 Difference]: Finished difference Result 44302 states and 160475 transitions. [2023-11-12 01:03:35,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 01:03:35,427 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 [2023-11-12 01:03:35,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:03:35,728 INFO L225 Difference]: With dead ends: 44302 [2023-11-12 01:03:35,728 INFO L226 Difference]: Without dead ends: 44302 [2023-11-12 01:03:35,728 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 [2023-11-12 01:03:35,732 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 113 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-12 01:03:35,733 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 117 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-12 01:03:35,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44302 states. [2023-11-12 01:03:37,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44302 to 36160. [2023-11-12 01:03:37,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36160 states, 35909 states have (on average 3.679578935642875) internal successors, (132130), 36159 states have internal predecessors, (132130), 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) [2023-11-12 01:03:38,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36160 states to 36160 states and 132130 transitions. [2023-11-12 01:03:38,131 INFO L78 Accepts]: Start accepts. Automaton has 36160 states and 132130 transitions. Word has length 5 [2023-11-12 01:03:38,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:03:38,133 INFO L495 AbstractCegarLoop]: Abstraction has 36160 states and 132130 transitions. [2023-11-12 01:03:38,133 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) [2023-11-12 01:03:38,133 INFO L276 IsEmpty]: Start isEmpty. Operand 36160 states and 132130 transitions. [2023-11-12 01:03:38,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-12 01:03:38,136 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:03:38,136 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:03:38,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-12 01:03:38,138 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting qrcu_updaterErr4ASSERT_VIOLATIONDATA_RACE === [qrcu_reader1Err0ASSERT_VIOLATIONDATA_RACE, qrcu_reader1Err7ASSERT_VIOLATIONDATA_RACE, qrcu_reader1Err1ASSERT_VIOLATIONDATA_RACE (and 107 more)] === [2023-11-12 01:03:38,139 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:03:38,144 INFO L85 PathProgramCache]: Analyzing trace with hash -677578174, now seen corresponding path program 1 times [2023-11-12 01:03:38,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:03:38,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313947635] [2023-11-12 01:03:38,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:03:38,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:03:38,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:03:38,256 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:03:38,256 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:03:38,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313947635] [2023-11-12 01:03:38,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313947635] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:03:38,257 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 01:03:38,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 01:03:38,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179710453] [2023-11-12 01:03:38,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:03:38,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 01:03:38,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:03:38,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 01:03:38,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 01:03:38,260 INFO L87 Difference]: Start difference. First operand 36160 states and 132130 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) [2023-11-12 01:03:38,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:03:38,833 INFO L93 Difference]: Finished difference Result 51298 states and 185588 transitions. [2023-11-12 01:03:38,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 01:03:38,833 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 [2023-11-12 01:03:38,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:03:39,168 INFO L225 Difference]: With dead ends: 51298 [2023-11-12 01:03:39,168 INFO L226 Difference]: Without dead ends: 51280 [2023-11-12 01:03:39,168 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 [2023-11-12 01:03:39,169 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 72 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 01:03:39,170 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 93 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 01:03:39,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51280 states. [2023-11-12 01:03:41,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51280 to 38140. [2023-11-12 01:03:41,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38140 states, 37891 states have (on average 3.6679422554168535) internal successors, (138982), 38139 states have internal predecessors, (138982), 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) [2023-11-12 01:03:41,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38140 states to 38140 states and 138982 transitions. [2023-11-12 01:03:41,763 INFO L78 Accepts]: Start accepts. Automaton has 38140 states and 138982 transitions. Word has length 8 [2023-11-12 01:03:41,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:03:41,779 INFO L495 AbstractCegarLoop]: Abstraction has 38140 states and 138982 transitions. [2023-11-12 01:03:41,779 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) [2023-11-12 01:03:41,779 INFO L276 IsEmpty]: Start isEmpty. Operand 38140 states and 138982 transitions. [2023-11-12 01:03:41,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-12 01:03:41,783 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:03:41,783 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:03:41,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-12 01:03:41,783 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting qrcu_updaterErr2ASSERT_VIOLATIONDATA_RACE === [qrcu_reader1Err0ASSERT_VIOLATIONDATA_RACE, qrcu_reader1Err7ASSERT_VIOLATIONDATA_RACE, qrcu_reader1Err1ASSERT_VIOLATIONDATA_RACE (and 107 more)] === [2023-11-12 01:03:41,784 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:03:41,784 INFO L85 PathProgramCache]: Analyzing trace with hash -677578114, now seen corresponding path program 1 times [2023-11-12 01:03:41,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:03:41,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491252435] [2023-11-12 01:03:41,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:03:41,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:03:41,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:03:41,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:03:41,935 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:03:41,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491252435] [2023-11-12 01:03:41,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491252435] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:03:41,939 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 01:03:41,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 01:03:41,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579941799] [2023-11-12 01:03:41,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:03:41,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 01:03:41,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:03:41,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 01:03:41,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 01:03:41,942 INFO L87 Difference]: Start difference. First operand 38140 states and 138982 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) [2023-11-12 01:03:42,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:03:42,515 INFO L93 Difference]: Finished difference Result 53046 states and 191384 transitions. [2023-11-12 01:03:42,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 01:03:42,515 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 [2023-11-12 01:03:42,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:03:42,854 INFO L225 Difference]: With dead ends: 53046 [2023-11-12 01:03:42,855 INFO L226 Difference]: Without dead ends: 53010 [2023-11-12 01:03:42,855 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 [2023-11-12 01:03:42,856 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 72 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 01:03:42,857 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 95 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 01:03:42,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53010 states. [2023-11-12 01:03:44,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53010 to 40102. [2023-11-12 01:03:44,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40102 states, 39855 states have (on average 3.657684104880191) internal successors, (145777), 40101 states have internal predecessors, (145777), 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) [2023-11-12 01:03:44,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40102 states to 40102 states and 145777 transitions. [2023-11-12 01:03:44,472 INFO L78 Accepts]: Start accepts. Automaton has 40102 states and 145777 transitions. Word has length 8 [2023-11-12 01:03:44,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:03:44,472 INFO L495 AbstractCegarLoop]: Abstraction has 40102 states and 145777 transitions. [2023-11-12 01:03:44,473 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) [2023-11-12 01:03:44,473 INFO L276 IsEmpty]: Start isEmpty. Operand 40102 states and 145777 transitions. [2023-11-12 01:03:44,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-12 01:03:44,474 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:03:44,474 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:03:44,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-12 01:03:44,475 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting qrcu_reader1Err7ASSERT_VIOLATIONDATA_RACE === [qrcu_reader1Err0ASSERT_VIOLATIONDATA_RACE, qrcu_reader1Err7ASSERT_VIOLATIONDATA_RACE, qrcu_reader1Err1ASSERT_VIOLATIONDATA_RACE (and 107 more)] === [2023-11-12 01:03:44,475 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:03:44,475 INFO L85 PathProgramCache]: Analyzing trace with hash -1958114966, now seen corresponding path program 1 times [2023-11-12 01:03:44,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:03:44,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402291304] [2023-11-12 01:03:44,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:03:44,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:03:44,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:03:44,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:03:44,569 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:03:44,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402291304] [2023-11-12 01:03:44,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402291304] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:03:44,570 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 01:03:44,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 01:03:44,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125396992] [2023-11-12 01:03:44,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:03:44,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 01:03:44,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:03:44,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 01:03:44,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 01:03:44,572 INFO L87 Difference]: Start difference. First operand 40102 states and 145777 transitions. Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 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) [2023-11-12 01:03:45,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:03:45,499 INFO L93 Difference]: Finished difference Result 36204 states and 128770 transitions. [2023-11-12 01:03:45,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 01:03:45,500 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 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 9 [2023-11-12 01:03:45,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:03:45,665 INFO L225 Difference]: With dead ends: 36204 [2023-11-12 01:03:45,665 INFO L226 Difference]: Without dead ends: 36200 [2023-11-12 01:03:45,666 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 [2023-11-12 01:03:45,667 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 73 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 01:03:45,667 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 102 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 01:03:45,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36200 states. [2023-11-12 01:03:46,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36200 to 35948. [2023-11-12 01:03:46,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35948 states, 35693 states have (on average 3.5863614714369763) internal successors, (128008), 35947 states have internal predecessors, (128008), 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) [2023-11-12 01:03:47,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35948 states to 35948 states and 128008 transitions. [2023-11-12 01:03:47,186 INFO L78 Accepts]: Start accepts. Automaton has 35948 states and 128008 transitions. Word has length 9 [2023-11-12 01:03:47,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:03:47,187 INFO L495 AbstractCegarLoop]: Abstraction has 35948 states and 128008 transitions. [2023-11-12 01:03:47,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 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) [2023-11-12 01:03:47,187 INFO L276 IsEmpty]: Start isEmpty. Operand 35948 states and 128008 transitions. [2023-11-12 01:03:47,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-12 01:03:47,188 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:03:47,188 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:03:47,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-12 01:03:47,189 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting qrcu_reader1Err7ASSERT_VIOLATIONDATA_RACE === [qrcu_reader1Err0ASSERT_VIOLATIONDATA_RACE, qrcu_reader1Err7ASSERT_VIOLATIONDATA_RACE, qrcu_reader1Err1ASSERT_VIOLATIONDATA_RACE (and 107 more)] === [2023-11-12 01:03:47,189 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:03:47,190 INFO L85 PathProgramCache]: Analyzing trace with hash -1958177338, now seen corresponding path program 1 times [2023-11-12 01:03:47,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:03:47,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836251797] [2023-11-12 01:03:47,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:03:47,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:03:47,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:03:47,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:03:47,260 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:03:47,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836251797] [2023-11-12 01:03:47,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836251797] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:03:47,260 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 01:03:47,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 01:03:47,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643499318] [2023-11-12 01:03:47,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:03:47,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 01:03:47,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:03:47,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 01:03:47,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 01:03:47,262 INFO L87 Difference]: Start difference. First operand 35948 states and 128008 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 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) [2023-11-12 01:03:47,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:03:47,766 INFO L93 Difference]: Finished difference Result 37688 states and 134195 transitions. [2023-11-12 01:03:47,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 01:03:47,766 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 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 9 [2023-11-12 01:03:47,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:03:47,952 INFO L225 Difference]: With dead ends: 37688 [2023-11-12 01:03:47,953 INFO L226 Difference]: Without dead ends: 37688 [2023-11-12 01:03:47,953 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 [2023-11-12 01:03:47,954 INFO L413 NwaCegarLoop]: 106 mSDtfsCounter, 98 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 01:03:47,954 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 159 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 01:03:48,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37688 states. [2023-11-12 01:03:49,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37688 to 37688. [2023-11-12 01:03:49,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37688 states, 37441 states have (on average 3.584172431291899) internal successors, (134195), 37687 states have internal predecessors, (134195), 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) [2023-11-12 01:03:49,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37688 states to 37688 states and 134195 transitions. [2023-11-12 01:03:49,637 INFO L78 Accepts]: Start accepts. Automaton has 37688 states and 134195 transitions. Word has length 9 [2023-11-12 01:03:49,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:03:49,637 INFO L495 AbstractCegarLoop]: Abstraction has 37688 states and 134195 transitions. [2023-11-12 01:03:49,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 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) [2023-11-12 01:03:49,638 INFO L276 IsEmpty]: Start isEmpty. Operand 37688 states and 134195 transitions. [2023-11-12 01:03:49,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-12 01:03:49,639 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:03:49,640 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:03:49,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-12 01:03:49,640 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting qrcu_reader1Err8ASSERT_VIOLATIONDATA_RACE === [qrcu_reader1Err0ASSERT_VIOLATIONDATA_RACE, qrcu_reader1Err7ASSERT_VIOLATIONDATA_RACE, qrcu_reader1Err1ASSERT_VIOLATIONDATA_RACE (and 107 more)] === [2023-11-12 01:03:49,641 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:03:49,641 INFO L85 PathProgramCache]: Analyzing trace with hash -612314979, now seen corresponding path program 1 times [2023-11-12 01:03:49,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:03:49,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717230696] [2023-11-12 01:03:49,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:03:49,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:03:49,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:03:49,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:03:49,691 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:03:49,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717230696] [2023-11-12 01:03:49,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717230696] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:03:49,692 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 01:03:49,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 01:03:49,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733111020] [2023-11-12 01:03:49,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:03:49,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 01:03:49,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:03:49,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 01:03:49,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 01:03:49,694 INFO L87 Difference]: Start difference. First operand 37688 states and 134195 transitions. Second operand has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 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)