./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-data-race.prp --file ../../sv-benchmarks/c/pthread-divine/ring_2w1r-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for data races Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65e41363-3527-4e90-b9e6-e27512c98071/bin/utaipan-verify-t7M7D8N6sZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65e41363-3527-4e90-b9e6-e27512c98071/bin/utaipan-verify-t7M7D8N6sZ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65e41363-3527-4e90-b9e6-e27512c98071/bin/utaipan-verify-t7M7D8N6sZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65e41363-3527-4e90-b9e6-e27512c98071/bin/utaipan-verify-t7M7D8N6sZ/config/TaipanReach.xml -i ../../sv-benchmarks/c/pthread-divine/ring_2w1r-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65e41363-3527-4e90-b9e6-e27512c98071/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-DataRace-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65e41363-3527-4e90-b9e6-e27512c98071/bin/utaipan-verify-t7M7D8N6sZ --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 37b8edad74269e9ff0decb0295cb9343b2467e698f16054f344bf342aab69b21 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 05:13:26,320 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 05:13:26,415 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65e41363-3527-4e90-b9e6-e27512c98071/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-DataRace-32bit-Taipan_Default.epf [2023-11-19 05:13:26,422 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 05:13:26,423 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 05:13:26,457 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 05:13:26,458 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 05:13:26,458 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 05:13:26,459 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 05:13:26,460 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 05:13:26,461 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-19 05:13:26,461 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-19 05:13:26,462 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-19 05:13:26,463 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-19 05:13:26,463 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-19 05:13:26,464 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-19 05:13:26,465 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-19 05:13:26,465 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-19 05:13:26,466 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-19 05:13:26,467 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-19 05:13:26,467 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-19 05:13:26,468 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-19 05:13:26,469 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 05:13:26,470 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 05:13:26,471 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 05:13:26,471 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 05:13:26,472 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 05:13:26,472 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 05:13:26,473 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 05:13:26,473 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 05:13:26,474 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 05:13:26,474 INFO L153 SettingsManager]: * Check absence of data races in concurrent programs=true [2023-11-19 05:13:26,475 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-19 05:13:26,475 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 05:13:26,476 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 05:13:26,477 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 05:13:26,477 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 05:13:26,478 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 05:13:26,478 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 05:13:26,479 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 05:13:26,479 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 05:13:26,480 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 05:13:26,480 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-19 05:13:26,480 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 05:13:26,480 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 05:13:26,485 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-19 05:13:26,485 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 05:13:26,486 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_65e41363-3527-4e90-b9e6-e27512c98071/bin/utaipan-verify-t7M7D8N6sZ/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65e41363-3527-4e90-b9e6-e27512c98071/bin/utaipan-verify-t7M7D8N6sZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! data-race) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 37b8edad74269e9ff0decb0295cb9343b2467e698f16054f344bf342aab69b21 [2023-11-19 05:13:26,864 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 05:13:26,912 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 05:13:26,915 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 05:13:26,919 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 05:13:26,920 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 05:13:26,921 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65e41363-3527-4e90-b9e6-e27512c98071/bin/utaipan-verify-t7M7D8N6sZ/../../sv-benchmarks/c/pthread-divine/ring_2w1r-2.i [2023-11-19 05:13:30,621 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 05:13:31,082 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 05:13:31,083 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65e41363-3527-4e90-b9e6-e27512c98071/sv-benchmarks/c/pthread-divine/ring_2w1r-2.i [2023-11-19 05:13:31,114 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65e41363-3527-4e90-b9e6-e27512c98071/bin/utaipan-verify-t7M7D8N6sZ/data/ebc623f7e/cb9acfb30dd74584a1b5494aff008141/FLAG32f4b981c [2023-11-19 05:13:31,141 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65e41363-3527-4e90-b9e6-e27512c98071/bin/utaipan-verify-t7M7D8N6sZ/data/ebc623f7e/cb9acfb30dd74584a1b5494aff008141 [2023-11-19 05:13:31,151 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 05:13:31,156 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 05:13:31,160 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 05:13:31,161 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 05:13:31,167 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 05:13:31,168 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:13:31" (1/1) ... [2023-11-19 05:13:31,169 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@48c7a4fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:13:31, skipping insertion in model container [2023-11-19 05:13:31,170 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:13:31" (1/1) ... [2023-11-19 05:13:31,272 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 05:13:31,475 WARN L635 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-11-19 05:13:32,098 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 05:13:32,115 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 05:13:32,144 WARN L635 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-11-19 05:13:32,231 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 05:13:32,387 WARN L675 CHandler]: The function __builtin_bswap16 is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 05:13:32,397 INFO L206 MainTranslator]: Completed translation [2023-11-19 05:13:32,397 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:13:32 WrapperNode [2023-11-19 05:13:32,398 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 05:13:32,399 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 05:13:32,399 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 05:13:32,399 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 05:13:32,409 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:13:32" (1/1) ... [2023-11-19 05:13:32,470 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:13:32" (1/1) ... [2023-11-19 05:13:32,547 INFO L138 Inliner]: procedures = 309, calls = 70, calls flagged for inlining = 17, calls inlined = 12, statements flattened = 350 [2023-11-19 05:13:32,548 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 05:13:32,549 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 05:13:32,549 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 05:13:32,549 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 05:13:32,561 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:13:32" (1/1) ... [2023-11-19 05:13:32,562 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:13:32" (1/1) ... [2023-11-19 05:13:32,586 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:13:32" (1/1) ... [2023-11-19 05:13:32,592 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:13:32" (1/1) ... [2023-11-19 05:13:32,658 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:13:32" (1/1) ... [2023-11-19 05:13:32,669 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:13:32" (1/1) ... [2023-11-19 05:13:32,680 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:13:32" (1/1) ... [2023-11-19 05:13:32,684 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:13:32" (1/1) ... [2023-11-19 05:13:32,691 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 05:13:32,692 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 05:13:32,692 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 05:13:32,693 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 05:13:32,694 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:13:32" (1/1) ... [2023-11-19 05:13:32,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 05:13:32,716 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65e41363-3527-4e90-b9e6-e27512c98071/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:13:32,739 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65e41363-3527-4e90-b9e6-e27512c98071/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 05:13:32,767 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65e41363-3527-4e90-b9e6-e27512c98071/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 05:13:32,803 INFO L130 BoogieDeclarations]: Found specification of procedure reader_two [2023-11-19 05:13:32,804 INFO L138 BoogieDeclarations]: Found implementation of procedure reader_two [2023-11-19 05:13:32,804 INFO L130 BoogieDeclarations]: Found specification of procedure writer_fn [2023-11-19 05:13:32,806 INFO L138 BoogieDeclarations]: Found implementation of procedure writer_fn [2023-11-19 05:13:32,807 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 05:13:32,807 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 05:13:32,807 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 05:13:32,807 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 05:13:32,808 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 05:13:32,808 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 05:13:32,808 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 05:13:32,809 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 05:13:32,811 WARN L210 CfgBuilder]: User set CodeBlockSize to LoopFreeBlock but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-19 05:13:33,050 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 05:13:33,053 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 05:13:33,946 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 05:13:33,976 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 05:13:33,977 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-11-19 05:13:33,990 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:13:33 BoogieIcfgContainer [2023-11-19 05:13:33,992 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 05:13:33,995 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 05:13:33,996 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 05:13:34,000 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 05:13:34,001 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 05:13:31" (1/3) ... [2023-11-19 05:13:34,002 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50e70283 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:13:34, skipping insertion in model container [2023-11-19 05:13:34,003 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:13:32" (2/3) ... [2023-11-19 05:13:34,005 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50e70283 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:13:34, skipping insertion in model container [2023-11-19 05:13:34,005 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:13:33" (3/3) ... [2023-11-19 05:13:34,006 INFO L112 eAbstractionObserver]: Analyzing ICFG ring_2w1r-2.i [2023-11-19 05:13:34,017 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-19 05:13:34,030 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 05:13:34,030 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 26 error locations. [2023-11-19 05:13:34,031 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-19 05:13:34,283 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-19 05:13:34,331 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-19 05:13:34,355 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 393 places, 407 transitions, 828 flow [2023-11-19 05:13:34,361 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 393 places, 407 transitions, 828 flow [2023-11-19 05:13:34,363 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 393 places, 407 transitions, 828 flow [2023-11-19 05:13:34,660 INFO L124 PetriNetUnfolderBase]: 21/405 cut-off events. [2023-11-19 05:13:34,661 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-19 05:13:34,684 INFO L83 FinitePrefix]: Finished finitePrefix Result has 414 conditions, 405 events. 21/405 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 985 event pairs, 0 based on Foata normal form. 0/358 useless extension candidates. Maximal degree in co-relation 344. Up to 2 conditions per place. [2023-11-19 05:13:34,742 INFO L119 LiptonReduction]: Number of co-enabled transitions 72100 [2023-11-19 05:14:00,786 INFO L134 LiptonReduction]: Checked pairs total: 1866952 [2023-11-19 05:14:00,787 INFO L136 LiptonReduction]: Total number of compositions: 354 [2023-11-19 05:14:00,799 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 198 places, 204 transitions, 422 flow [2023-11-19 05:14:08,465 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 184123 states, 183499 states have (on average 3.1662297887181947) internal successors, (581000), 184122 states have internal predecessors, (581000), 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) [2023-11-19 05:14:08,516 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 05:14:08,524 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;@52e96a1a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-19 05:14:08,525 INFO L358 AbstractCegarLoop]: Starting to check reachability of 44 error locations. [2023-11-19 05:14:08,768 INFO L276 IsEmpty]: Start isEmpty. Operand has 184123 states, 183499 states have (on average 3.1662297887181947) internal successors, (581000), 184122 states have internal predecessors, (581000), 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) [2023-11-19 05:14:08,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2 [2023-11-19 05:14:08,773 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:14:08,774 INFO L195 NwaCegarLoop]: trace histogram [1] [2023-11-19 05:14:08,774 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONDATA_RACE === [reader_twoErr0ASSERT_VIOLATIONDATA_RACE, reader_twoErr1ASSERT_VIOLATIONDATA_RACE, reader_twoErr2ASSERT_VIOLATIONDATA_RACE (and 41 more)] === [2023-11-19 05:14:08,781 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:14:08,781 INFO L85 PathProgramCache]: Analyzing trace with hash 1458, now seen corresponding path program 1 times [2023-11-19 05:14:08,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:14:08,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697726353] [2023-11-19 05:14:08,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:14:08,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:14:08,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:14:08,934 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:14:08,934 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:14:08,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697726353] [2023-11-19 05:14:08,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697726353] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:14:08,938 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:14:08,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-11-19 05:14:08,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45995531] [2023-11-19 05:14:08,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:14:08,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-19 05:14:08,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:14:08,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-19 05:14:08,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 05:14:09,346 INFO L87 Difference]: Start difference. First operand has 184123 states, 183499 states have (on average 3.1662297887181947) internal successors, (581000), 184122 states have internal predecessors, (581000), 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 1.0) internal successors, (1), 1 states have internal predecessors, (1), 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) [2023-11-19 05:14:13,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:14:13,128 INFO L93 Difference]: Finished difference Result 184121 states and 564122 transitions. [2023-11-19 05:14:13,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-19 05:14:13,130 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 1 states have (on average 1.0) internal successors, (1), 1 states have internal predecessors, (1), 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 1 [2023-11-19 05:14:13,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted.