./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-data-race.prp --file ../../sv-benchmarks/c/pthread-ext/09_fmaxsym.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for data races Using default analysis Version e04fb08f 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_8534f5b1-dc57-4a86-a398-54ed898eb414/bin/utaipan-Xvt2sAort0/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8534f5b1-dc57-4a86-a398-54ed898eb414/bin/utaipan-Xvt2sAort0/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8534f5b1-dc57-4a86-a398-54ed898eb414/bin/utaipan-Xvt2sAort0/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8534f5b1-dc57-4a86-a398-54ed898eb414/bin/utaipan-Xvt2sAort0/config/TaipanReach.xml -i ../../sv-benchmarks/c/pthread-ext/09_fmaxsym.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8534f5b1-dc57-4a86-a398-54ed898eb414/bin/utaipan-Xvt2sAort0/config/svcomp-DataRace-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8534f5b1-dc57-4a86-a398-54ed898eb414/bin/utaipan-Xvt2sAort0 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! data-race) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 0bf02669c3dd381b0745ab8dce392518dfe698af15c4a94bd383f1dab20a8c06 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-e04fb08 [2022-11-16 16:09:12,145 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 16:09:12,148 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 16:09:12,194 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 16:09:12,195 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 16:09:12,200 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 16:09:12,203 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 16:09:12,207 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 16:09:12,210 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 16:09:12,217 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 16:09:12,219 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 16:09:12,221 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 16:09:12,223 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 16:09:12,229 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 16:09:12,231 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 16:09:12,233 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 16:09:12,235 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 16:09:12,236 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 16:09:12,238 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 16:09:12,240 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 16:09:12,247 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 16:09:12,249 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 16:09:12,250 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 16:09:12,251 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 16:09:12,255 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 16:09:12,256 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 16:09:12,256 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 16:09:12,257 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 16:09:12,258 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 16:09:12,259 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 16:09:12,260 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 16:09:12,261 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 16:09:12,262 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 16:09:12,263 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 16:09:12,264 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 16:09:12,265 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 16:09:12,266 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 16:09:12,266 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 16:09:12,267 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 16:09:12,268 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 16:09:12,269 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 16:09:12,271 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8534f5b1-dc57-4a86-a398-54ed898eb414/bin/utaipan-Xvt2sAort0/config/svcomp-DataRace-32bit-Taipan_Default.epf [2022-11-16 16:09:12,316 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 16:09:12,317 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 16:09:12,318 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 16:09:12,319 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 16:09:12,320 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 16:09:12,320 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 16:09:12,320 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-16 16:09:12,320 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-16 16:09:12,321 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-16 16:09:12,321 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-16 16:09:12,322 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-16 16:09:12,323 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-16 16:09:12,323 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-16 16:09:12,323 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-16 16:09:12,323 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-16 16:09:12,324 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-16 16:09:12,324 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-16 16:09:12,324 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-16 16:09:12,325 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 16:09:12,325 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 16:09:12,325 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-16 16:09:12,326 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 16:09:12,326 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 16:09:12,326 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 16:09:12,326 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-16 16:09:12,327 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 16:09:12,327 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-16 16:09:12,327 INFO L138 SettingsManager]: * Check absence of data races in concurrent programs=true [2022-11-16 16:09:12,327 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 16:09:12,328 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-16 16:09:12,328 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 16:09:12,328 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-16 16:09:12,329 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 16:09:12,329 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 16:09:12,329 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 16:09:12,329 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 16:09:12,330 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-16 16:09:12,330 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 16:09:12,331 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-16 16:09:12,332 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-16 16:09:12,332 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 16:09:12,332 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-16 16:09:12,333 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-16 16:09:12,333 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8534f5b1-dc57-4a86-a398-54ed898eb414/bin/utaipan-Xvt2sAort0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8534f5b1-dc57-4a86-a398-54ed898eb414/bin/utaipan-Xvt2sAort0 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! data-race) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0bf02669c3dd381b0745ab8dce392518dfe698af15c4a94bd383f1dab20a8c06 [2022-11-16 16:09:12,651 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 16:09:12,683 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 16:09:12,686 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 16:09:12,688 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 16:09:12,688 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 16:09:12,690 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8534f5b1-dc57-4a86-a398-54ed898eb414/bin/utaipan-Xvt2sAort0/../../sv-benchmarks/c/pthread-ext/09_fmaxsym.i [2022-11-16 16:09:12,768 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8534f5b1-dc57-4a86-a398-54ed898eb414/bin/utaipan-Xvt2sAort0/data/571bf3522/f12dabb6297b42469ca06f45ae05f2f2/FLAG941b0d5fd [2022-11-16 16:09:13,447 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 16:09:13,460 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8534f5b1-dc57-4a86-a398-54ed898eb414/sv-benchmarks/c/pthread-ext/09_fmaxsym.i [2022-11-16 16:09:13,481 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8534f5b1-dc57-4a86-a398-54ed898eb414/bin/utaipan-Xvt2sAort0/data/571bf3522/f12dabb6297b42469ca06f45ae05f2f2/FLAG941b0d5fd [2022-11-16 16:09:13,709 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8534f5b1-dc57-4a86-a398-54ed898eb414/bin/utaipan-Xvt2sAort0/data/571bf3522/f12dabb6297b42469ca06f45ae05f2f2 [2022-11-16 16:09:13,714 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 16:09:13,718 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 16:09:13,722 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 16:09:13,722 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 16:09:13,727 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 16:09:13,728 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 04:09:13" (1/1) ... [2022-11-16 16:09:13,731 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@9182d81 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:09:13, skipping insertion in model container [2022-11-16 16:09:13,732 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 04:09:13" (1/1) ... [2022-11-16 16:09:13,741 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 16:09:13,811 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 16:09:14,270 WARN L229 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8534f5b1-dc57-4a86-a398-54ed898eb414/sv-benchmarks/c/pthread-ext/09_fmaxsym.i[30422,30435] [2022-11-16 16:09:14,279 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 16:09:14,290 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 16:09:14,333 WARN L229 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8534f5b1-dc57-4a86-a398-54ed898eb414/sv-benchmarks/c/pthread-ext/09_fmaxsym.i[30422,30435] [2022-11-16 16:09:14,337 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 16:09:14,372 INFO L208 MainTranslator]: Completed translation [2022-11-16 16:09:14,372 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:09:14 WrapperNode [2022-11-16 16:09:14,373 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 16:09:14,374 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 16:09:14,374 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 16:09:14,374 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 16:09:14,383 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:09:14" (1/1) ... [2022-11-16 16:09:14,398 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:09:14" (1/1) ... [2022-11-16 16:09:14,424 INFO L138 Inliner]: procedures = 171, calls = 24, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 102 [2022-11-16 16:09:14,424 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 16:09:14,425 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 16:09:14,425 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 16:09:14,425 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 16:09:14,436 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:09:14" (1/1) ... [2022-11-16 16:09:14,436 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:09:14" (1/1) ... [2022-11-16 16:09:14,440 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:09:14" (1/1) ... [2022-11-16 16:09:14,440 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:09:14" (1/1) ... [2022-11-16 16:09:14,447 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:09:14" (1/1) ... [2022-11-16 16:09:14,451 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:09:14" (1/1) ... [2022-11-16 16:09:14,453 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:09:14" (1/1) ... [2022-11-16 16:09:14,455 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:09:14" (1/1) ... [2022-11-16 16:09:14,458 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 16:09:14,459 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 16:09:14,459 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 16:09:14,459 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 16:09:14,461 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:09:14" (1/1) ... [2022-11-16 16:09:14,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 16:09:14,484 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8534f5b1-dc57-4a86-a398-54ed898eb414/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:09:14,498 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8534f5b1-dc57-4a86-a398-54ed898eb414/bin/utaipan-Xvt2sAort0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 16:09:14,512 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8534f5b1-dc57-4a86-a398-54ed898eb414/bin/utaipan-Xvt2sAort0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 16:09:14,559 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-16 16:09:14,560 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2022-11-16 16:09:14,560 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2022-11-16 16:09:14,560 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-16 16:09:14,560 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 16:09:14,561 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-16 16:09:14,561 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-16 16:09:14,561 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-16 16:09:14,561 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 16:09:14,561 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 16:09:14,563 WARN L209 CfgBuilder]: User set CodeBlockSize to LoopFreeBlock but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-16 16:09:14,716 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 16:09:14,719 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 16:09:15,137 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 16:09:15,223 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 16:09:15,224 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-16 16:09:15,227 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 04:09:15 BoogieIcfgContainer [2022-11-16 16:09:15,227 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 16:09:15,230 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 16:09:15,230 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 16:09:15,235 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 16:09:15,235 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 04:09:13" (1/3) ... [2022-11-16 16:09:15,236 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15ba2de2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 04:09:15, skipping insertion in model container [2022-11-16 16:09:15,236 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:09:14" (2/3) ... [2022-11-16 16:09:15,237 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15ba2de2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 04:09:15, skipping insertion in model container [2022-11-16 16:09:15,237 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 04:09:15" (3/3) ... [2022-11-16 16:09:15,247 INFO L112 eAbstractionObserver]: Analyzing ICFG 09_fmaxsym.i [2022-11-16 16:09:15,258 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-16 16:09:15,271 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 16:09:15,271 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 8 error locations. [2022-11-16 16:09:15,272 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-16 16:09:15,390 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-16 16:09:15,437 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-16 16:09:15,456 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 96 places, 99 transitions, 203 flow [2022-11-16 16:09:15,459 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 96 places, 99 transitions, 203 flow [2022-11-16 16:09:15,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 96 places, 99 transitions, 203 flow [2022-11-16 16:09:15,563 INFO L130 PetriNetUnfolder]: 7/110 cut-off events. [2022-11-16 16:09:15,567 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-16 16:09:15,577 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115 conditions, 110 events. 7/110 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 100 event pairs, 0 based on Foata normal form. 0/93 useless extension candidates. Maximal degree in co-relation 74. Up to 4 conditions per place. [2022-11-16 16:09:15,581 INFO L119 LiptonReduction]: Number of co-enabled transitions 1708 [2022-11-16 16:09:20,957 INFO L134 LiptonReduction]: Checked pairs total: 1840 [2022-11-16 16:09:20,958 INFO L136 LiptonReduction]: Total number of compositions: 118 [2022-11-16 16:09:20,967 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 19 places, 17 transitions, 39 flow [2022-11-16 16:09:20,985 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 57 states, 40 states have (on average 2.5) internal successors, (100), 56 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:09:21,007 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 16:09:21,015 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@34775798, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 16:09:21,015 INFO L358 AbstractCegarLoop]: Starting to check reachability of 17 error locations. [2022-11-16 16:09:21,018 INFO L276 IsEmpty]: Start isEmpty. Operand has 57 states, 40 states have (on average 2.5) internal successors, (100), 56 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:09:21,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-16 16:09:21,024 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:09:21,024 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-16 16:09:21,025 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err2ASSERT_VIOLATIONDATA_RACE === [thr1Err0ASSERT_VIOLATIONDATA_RACE, thr1Err1ASSERT_VIOLATIONDATA_RACE, thr1Err2ASSERT_VIOLATIONDATA_RACE, thr1Err3ASSERT_VIOLATIONDATA_RACE (and 13 more)] === [2022-11-16 16:09:21,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:09:21,032 INFO L85 PathProgramCache]: Analyzing trace with hash 485938642, now seen corresponding path program 1 times [2022-11-16 16:09:21,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 16:09:21,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231862666] [2022-11-16 16:09:21,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:09:21,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 16:09:21,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:09:21,254 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:09:21,255 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 16:09:21,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231862666] [2022-11-16 16:09:21,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231862666] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:09:21,257 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 16:09:21,257 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 16:09:21,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466123839] [2022-11-16 16:09:21,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:09:21,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-16 16:09:21,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 16:09:21,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-16 16:09:21,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-16 16:09:21,311 INFO L87 Difference]: Start difference. First operand has 57 states, 40 states have (on average 2.5) internal successors, (100), 56 states have internal predecessors, (100), 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 5.0) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:09:21,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:09:21,355 INFO L93 Difference]: Finished difference Result 15 states and 24 transitions. [2022-11-16 16:09:21,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-16 16:09:21,358 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 1 states have (on average 5.0) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-16 16:09:21,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:09:21,366 INFO L225 Difference]: With dead ends: 15 [2022-11-16 16:09:21,366 INFO L226 Difference]: Without dead ends: 15 [2022-11-16 16:09:21,367 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-16 16:09:21,371 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 16:09:21,372 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 1 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 16:09:21,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-11-16 16:09:21,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-11-16 16:09:21,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:09:21,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 24 transitions. [2022-11-16 16:09:21,407 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 24 transitions. Word has length 5 [2022-11-16 16:09:21,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:09:21,408 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 24 transitions. [2022-11-16 16:09:21,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 1 states have (on average 5.0) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:09:21,413 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 24 transitions. [2022-11-16 16:09:21,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-16 16:09:21,415 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:09:21,415 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2022-11-16 16:09:21,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-16 16:09:21,416 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONDATA_RACE, thr1Err1ASSERT_VIOLATIONDATA_RACE, thr1Err2ASSERT_VIOLATIONDATA_RACE, thr1Err3ASSERT_VIOLATIONDATA_RACE (and 13 more)] === [2022-11-16 16:09:21,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:09:21,418 INFO L85 PathProgramCache]: Analyzing trace with hash -2115861522, now seen corresponding path program 1 times [2022-11-16 16:09:21,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 16:09:21,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046616952] [2022-11-16 16:09:21,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:09:21,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 16:09:21,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 16:09:21,477 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-16 16:09:21,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 16:09:21,514 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-16 16:09:21,514 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-16 16:09:21,517 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (16 of 17 remaining) [2022-11-16 16:09:21,519 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONDATA_RACE (15 of 17 remaining) [2022-11-16 16:09:21,519 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONDATA_RACE (14 of 17 remaining) [2022-11-16 16:09:21,520 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONDATA_RACE (13 of 17 remaining) [2022-11-16 16:09:21,520 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONDATA_RACE (12 of 17 remaining) [2022-11-16 16:09:21,520 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5ASSERT_VIOLATIONDATA_RACE (11 of 17 remaining) [2022-11-16 16:09:21,520 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6ASSERT_VIOLATIONDATA_RACE (10 of 17 remaining) [2022-11-16 16:09:21,521 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7ASSERT_VIOLATIONDATA_RACE (9 of 17 remaining) [2022-11-16 16:09:21,521 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONDATA_RACE (8 of 17 remaining) [2022-11-16 16:09:21,521 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONDATA_RACE (7 of 17 remaining) [2022-11-16 16:09:21,522 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONDATA_RACE (6 of 17 remaining) [2022-11-16 16:09:21,522 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONDATA_RACE (5 of 17 remaining) [2022-11-16 16:09:21,522 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONDATA_RACE (4 of 17 remaining) [2022-11-16 16:09:21,522 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5ASSERT_VIOLATIONDATA_RACE (3 of 17 remaining) [2022-11-16 16:09:21,523 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6ASSERT_VIOLATIONDATA_RACE (2 of 17 remaining) [2022-11-16 16:09:21,523 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7ASSERT_VIOLATIONDATA_RACE (1 of 17 remaining) [2022-11-16 16:09:21,523 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONDATA_RACE (0 of 17 remaining) [2022-11-16 16:09:21,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-16 16:09:21,526 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1] [2022-11-16 16:09:21,529 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-16 16:09:21,529 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-11-16 16:09:21,574 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-16 16:09:21,578 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-16 16:09:21,579 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 155 places, 161 transitions, 334 flow [2022-11-16 16:09:21,579 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 155 places, 161 transitions, 334 flow [2022-11-16 16:09:21,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 155 places, 161 transitions, 334 flow [2022-11-16 16:09:21,635 INFO L130 PetriNetUnfolder]: 13/185 cut-off events. [2022-11-16 16:09:21,635 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-16 16:09:21,638 INFO L83 FinitePrefix]: Finished finitePrefix Result has 195 conditions, 185 events. 13/185 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 355 event pairs, 0 based on Foata normal form. 0/153 useless extension candidates. Maximal degree in co-relation 135. Up to 6 conditions per place. [2022-11-16 16:09:21,646 INFO L119 LiptonReduction]: Number of co-enabled transitions 10980 [2022-11-16 16:09:26,647 INFO L134 LiptonReduction]: Checked pairs total: 28529 [2022-11-16 16:09:26,648 INFO L136 LiptonReduction]: Total number of compositions: 149 [2022-11-16 16:09:26,649 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 55 places, 56 transitions, 124 flow [2022-11-16 16:09:26,787 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 3015 states, 2846 states have (on average 3.15671117357695) internal successors, (8984), 3014 states have internal predecessors, (8984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:09:26,789 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 16:09:26,790 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@34775798, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 16:09:26,790 INFO L358 AbstractCegarLoop]: Starting to check reachability of 25 error locations. [2022-11-16 16:09:26,802 INFO L276 IsEmpty]: Start isEmpty. Operand has 3015 states, 2846 states have (on average 3.15671117357695) internal successors, (8984), 3014 states have internal predecessors, (8984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:09:26,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-16 16:09:26,803 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:09:26,803 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-16 16:09:26,804 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err2ASSERT_VIOLATIONDATA_RACE === [thr1Err0ASSERT_VIOLATIONDATA_RACE, thr1Err1ASSERT_VIOLATIONDATA_RACE, thr1Err2ASSERT_VIOLATIONDATA_RACE, thr1Err3ASSERT_VIOLATIONDATA_RACE (and 21 more)] === [2022-11-16 16:09:26,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:09:26,804 INFO L85 PathProgramCache]: Analyzing trace with hash 846390733, now seen corresponding path program 1 times [2022-11-16 16:09:26,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 16:09:26,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796222489] [2022-11-16 16:09:26,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:09:26,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 16:09:26,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:09:26,857 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:09:26,858 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 16:09:26,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796222489] [2022-11-16 16:09:26,858 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796222489] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:09:26,859 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 16:09:26,859 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 16:09:26,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450115414] [2022-11-16 16:09:26,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:09:26,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-16 16:09:26,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 16:09:26,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-16 16:09:26,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-16 16:09:26,871 INFO L87 Difference]: Start difference. First operand has 3015 states, 2846 states have (on average 3.15671117357695) internal successors, (8984), 3014 states have internal predecessors, (8984), 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 5.0) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:09:26,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:09:26,963 INFO L93 Difference]: Finished difference Result 1516 states and 4359 transitions. [2022-11-16 16:09:26,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-16 16:09:26,964 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 1 states have (on average 5.0) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-16 16:09:26,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:09:26,991 INFO L225 Difference]: With dead ends: 1516 [2022-11-16 16:09:26,992 INFO L226 Difference]: Without dead ends: 1516 [2022-11-16 16:09:26,992 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-16 16:09:26,993 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 16:09:26,994 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 23 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 16:09:27,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1516 states. [2022-11-16 16:09:27,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1516 to 1516. [2022-11-16 16:09:27,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1516 states, 1500 states have (on average 2.906) internal successors, (4359), 1515 states have internal predecessors, (4359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:09:27,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1516 states to 1516 states and 4359 transitions. [2022-11-16 16:09:27,165 INFO L78 Accepts]: Start accepts. Automaton has 1516 states and 4359 transitions. Word has length 5 [2022-11-16 16:09:27,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:09:27,165 INFO L495 AbstractCegarLoop]: Abstraction has 1516 states and 4359 transitions. [2022-11-16 16:09:27,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 1 states have (on average 5.0) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:09:27,167 INFO L276 IsEmpty]: Start isEmpty. Operand 1516 states and 4359 transitions. [2022-11-16 16:09:27,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-16 16:09:27,168 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:09:27,169 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:09:27,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-16 16:09:27,169 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err3ASSERT_VIOLATIONDATA_RACE === [thr1Err0ASSERT_VIOLATIONDATA_RACE, thr1Err1ASSERT_VIOLATIONDATA_RACE, thr1Err2ASSERT_VIOLATIONDATA_RACE, thr1Err3ASSERT_VIOLATIONDATA_RACE (and 21 more)] === [2022-11-16 16:09:27,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:09:27,171 INFO L85 PathProgramCache]: Analyzing trace with hash -926347093, now seen corresponding path program 1 times [2022-11-16 16:09:27,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 16:09:27,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241577339] [2022-11-16 16:09:27,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:09:27,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 16:09:27,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:09:27,286 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:09:27,287 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 16:09:27,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241577339] [2022-11-16 16:09:27,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241577339] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:09:27,288 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 16:09:27,288 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 16:09:27,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684159556] [2022-11-16 16:09:27,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:09:27,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 16:09:27,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 16:09:27,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 16:09:27,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 16:09:27,292 INFO L87 Difference]: Start difference. First operand 1516 states and 4359 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:09:27,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:09:27,510 INFO L93 Difference]: Finished difference Result 2132 states and 5871 transitions. [2022-11-16 16:09:27,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:09:27,511 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-16 16:09:27,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:09:27,529 INFO L225 Difference]: With dead ends: 2132 [2022-11-16 16:09:27,529 INFO L226 Difference]: Without dead ends: 2132 [2022-11-16 16:09:27,529 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 16:09:27,541 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 31 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 16:09:27,543 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 32 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 16:09:27,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2132 states. [2022-11-16 16:09:27,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2132 to 1548. [2022-11-16 16:09:27,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1548 states, 1536 states have (on average 2.7701822916666665) internal successors, (4255), 1547 states have internal predecessors, (4255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:09:27,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1548 states to 1548 states and 4255 transitions. [2022-11-16 16:09:27,628 INFO L78 Accepts]: Start accepts. Automaton has 1548 states and 4255 transitions. Word has length 8 [2022-11-16 16:09:27,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:09:27,629 INFO L495 AbstractCegarLoop]: Abstraction has 1548 states and 4255 transitions. [2022-11-16 16:09:27,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:09:27,629 INFO L276 IsEmpty]: Start isEmpty. Operand 1548 states and 4255 transitions. [2022-11-16 16:09:27,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 16:09:27,633 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:09:27,637 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2022-11-16 16:09:27,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-16 16:09:27,638 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONDATA_RACE, thr1Err1ASSERT_VIOLATIONDATA_RACE, thr1Err2ASSERT_VIOLATIONDATA_RACE, thr1Err3ASSERT_VIOLATIONDATA_RACE (and 21 more)] === [2022-11-16 16:09:27,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:09:27,640 INFO L85 PathProgramCache]: Analyzing trace with hash -1744082201, now seen corresponding path program 1 times [2022-11-16 16:09:27,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 16:09:27,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546368712] [2022-11-16 16:09:27,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:09:27,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 16:09:27,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 16:09:27,679 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-16 16:09:27,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 16:09:27,698 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-16 16:09:27,698 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-16 16:09:27,699 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (24 of 25 remaining) [2022-11-16 16:09:27,699 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONDATA_RACE (23 of 25 remaining) [2022-11-16 16:09:27,699 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONDATA_RACE (22 of 25 remaining) [2022-11-16 16:09:27,699 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONDATA_RACE (21 of 25 remaining) [2022-11-16 16:09:27,700 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONDATA_RACE (20 of 25 remaining) [2022-11-16 16:09:27,700 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5ASSERT_VIOLATIONDATA_RACE (19 of 25 remaining) [2022-11-16 16:09:27,700 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6ASSERT_VIOLATIONDATA_RACE (18 of 25 remaining) [2022-11-16 16:09:27,700 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7ASSERT_VIOLATIONDATA_RACE (17 of 25 remaining) [2022-11-16 16:09:27,701 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONDATA_RACE (16 of 25 remaining) [2022-11-16 16:09:27,701 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONDATA_RACE (15 of 25 remaining) [2022-11-16 16:09:27,701 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONDATA_RACE (14 of 25 remaining) [2022-11-16 16:09:27,701 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONDATA_RACE (13 of 25 remaining) [2022-11-16 16:09:27,702 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONDATA_RACE (12 of 25 remaining) [2022-11-16 16:09:27,702 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5ASSERT_VIOLATIONDATA_RACE (11 of 25 remaining) [2022-11-16 16:09:27,702 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6ASSERT_VIOLATIONDATA_RACE (10 of 25 remaining) [2022-11-16 16:09:27,702 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7ASSERT_VIOLATIONDATA_RACE (9 of 25 remaining) [2022-11-16 16:09:27,703 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONDATA_RACE (8 of 25 remaining) [2022-11-16 16:09:27,703 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONDATA_RACE (7 of 25 remaining) [2022-11-16 16:09:27,703 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONDATA_RACE (6 of 25 remaining) [2022-11-16 16:09:27,703 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONDATA_RACE (5 of 25 remaining) [2022-11-16 16:09:27,704 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONDATA_RACE (4 of 25 remaining) [2022-11-16 16:09:27,704 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5ASSERT_VIOLATIONDATA_RACE (3 of 25 remaining) [2022-11-16 16:09:27,704 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6ASSERT_VIOLATIONDATA_RACE (2 of 25 remaining) [2022-11-16 16:09:27,704 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7ASSERT_VIOLATIONDATA_RACE (1 of 25 remaining) [2022-11-16 16:09:27,705 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONDATA_RACE (0 of 25 remaining) [2022-11-16 16:09:27,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-16 16:09:27,705 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-11-16 16:09:27,706 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-16 16:09:27,706 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-11-16 16:09:27,761 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-16 16:09:27,769 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-16 16:09:27,771 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 214 places, 223 transitions, 467 flow [2022-11-16 16:09:27,771 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 214 places, 223 transitions, 467 flow [2022-11-16 16:09:27,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 214 places, 223 transitions, 467 flow [2022-11-16 16:09:27,885 INFO L130 PetriNetUnfolder]: 19/260 cut-off events. [2022-11-16 16:09:27,885 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-11-16 16:09:27,894 INFO L83 FinitePrefix]: Finished finitePrefix Result has 276 conditions, 260 events. 19/260 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 698 event pairs, 0 based on Foata normal form. 0/213 useless extension candidates. Maximal degree in co-relation 196. Up to 8 conditions per place. [2022-11-16 16:09:27,910 INFO L119 LiptonReduction]: Number of co-enabled transitions 27816 [2022-11-16 16:09:34,977 INFO L134 LiptonReduction]: Checked pairs total: 76391 [2022-11-16 16:09:34,978 INFO L136 LiptonReduction]: Total number of compositions: 213 [2022-11-16 16:09:34,987 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 79 places, 81 transitions, 183 flow [2022-11-16 16:09:37,852 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 66418 states, 64873 states have (on average 4.1658625314075195) internal successors, (270252), 66417 states have internal predecessors, (270252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:09:37,856 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 16:09:37,871 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@34775798, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 16:09:37,871 INFO L358 AbstractCegarLoop]: Starting to check reachability of 33 error locations. [2022-11-16 16:09:38,033 INFO L276 IsEmpty]: Start isEmpty. Operand has 66418 states, 64873 states have (on average 4.1658625314075195) internal successors, (270252), 66417 states have internal predecessors, (270252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:09:38,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-16 16:09:38,036 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:09:38,036 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-16 16:09:38,238 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONDATA_RACE === [thr1Err0ASSERT_VIOLATIONDATA_RACE, thr1Err1ASSERT_VIOLATIONDATA_RACE, thr1Err2ASSERT_VIOLATIONDATA_RACE, thr1Err3ASSERT_VIOLATIONDATA_RACE (and 29 more)] === [2022-11-16 16:09:38,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:09:38,239 INFO L85 PathProgramCache]: Analyzing trace with hash 1311711466, now seen corresponding path program 1 times [2022-11-16 16:09:38,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 16:09:38,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017078309] [2022-11-16 16:09:38,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:09:38,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 16:09:38,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:09:38,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:09:38,366 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 16:09:38,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017078309] [2022-11-16 16:09:38,383 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017078309] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:09:38,383 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 16:09:38,383 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 16:09:38,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034796870] [2022-11-16 16:09:38,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:09:38,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-16 16:09:38,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 16:09:38,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-16 16:09:38,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-16 16:09:38,525 INFO L87 Difference]: Start difference. First operand has 66418 states, 64873 states have (on average 4.1658625314075195) internal successors, (270252), 66417 states have internal predecessors, (270252), 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 5.0) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:09:39,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:09:39,323 INFO L93 Difference]: Finished difference Result 25792 states and 101429 transitions. [2022-11-16 16:09:39,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-16 16:09:39,324 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 1 states have (on average 5.0) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-16 16:09:39,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:09:39,912 INFO L225 Difference]: With dead ends: 25792 [2022-11-16 16:09:39,913 INFO L226 Difference]: Without dead ends: 25792 [2022-11-16 16:09:39,913 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-16 16:09:39,914 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 16:09:39,915 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 33 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 16:09:39,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25792 states. [2022-11-16 16:09:41,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25792 to 25792. [2022-11-16 16:09:41,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25792 states, 25728 states have (on average 3.9423585199004973) internal successors, (101429), 25791 states have internal predecessors, (101429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:09:42,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25792 states to 25792 states and 101429 transitions. [2022-11-16 16:09:42,489 INFO L78 Accepts]: Start accepts. Automaton has 25792 states and 101429 transitions. Word has length 5 [2022-11-16 16:09:42,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:09:42,490 INFO L495 AbstractCegarLoop]: Abstraction has 25792 states and 101429 transitions. [2022-11-16 16:09:42,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 1 states have (on average 5.0) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:09:42,490 INFO L276 IsEmpty]: Start isEmpty. Operand 25792 states and 101429 transitions. [2022-11-16 16:09:42,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-16 16:09:42,493 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:09:42,493 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:09:42,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-16 16:09:42,495 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err3ASSERT_VIOLATIONDATA_RACE === [thr1Err0ASSERT_VIOLATIONDATA_RACE, thr1Err1ASSERT_VIOLATIONDATA_RACE, thr1Err2ASSERT_VIOLATIONDATA_RACE, thr1Err3ASSERT_VIOLATIONDATA_RACE (and 29 more)] === [2022-11-16 16:09:42,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:09:42,496 INFO L85 PathProgramCache]: Analyzing trace with hash 1585114578, now seen corresponding path program 1 times [2022-11-16 16:09:42,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 16:09:42,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844675037] [2022-11-16 16:09:42,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:09:42,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 16:09:42,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:09:42,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:09:42,595 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 16:09:42,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844675037] [2022-11-16 16:09:42,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844675037] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:09:42,596 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 16:09:42,596 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 16:09:42,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202766621] [2022-11-16 16:09:42,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:09:42,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 16:09:42,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 16:09:42,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 16:09:42,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 16:09:42,598 INFO L87 Difference]: Start difference. First operand 25792 states and 101429 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:09:43,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:09:43,719 INFO L93 Difference]: Finished difference Result 39868 states and 148225 transitions. [2022-11-16 16:09:43,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:09:43,720 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-16 16:09:43,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:09:44,387 INFO L225 Difference]: With dead ends: 39868 [2022-11-16 16:09:44,387 INFO L226 Difference]: Without dead ends: 39868 [2022-11-16 16:09:44,388 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 16:09:44,389 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 45 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 16:09:44,391 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 45 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 16:09:44,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39868 states. [2022-11-16 16:09:45,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39868 to 29046. [2022-11-16 16:09:45,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29046 states, 28990 states have (on average 3.745532942393929) internal successors, (108583), 29045 states have internal predecessors, (108583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:09:45,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29046 states to 29046 states and 108583 transitions. [2022-11-16 16:09:45,978 INFO L78 Accepts]: Start accepts. Automaton has 29046 states and 108583 transitions. Word has length 8 [2022-11-16 16:09:45,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:09:45,978 INFO L495 AbstractCegarLoop]: Abstraction has 29046 states and 108583 transitions. [2022-11-16 16:09:45,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:09:45,979 INFO L276 IsEmpty]: Start isEmpty. Operand 29046 states and 108583 transitions. [2022-11-16 16:09:45,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 16:09:45,986 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:09:45,987 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:09:45,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-16 16:09:45,987 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err4ASSERT_VIOLATIONDATA_RACE === [thr1Err0ASSERT_VIOLATIONDATA_RACE, thr1Err1ASSERT_VIOLATIONDATA_RACE, thr1Err2ASSERT_VIOLATIONDATA_RACE, thr1Err3ASSERT_VIOLATIONDATA_RACE (and 29 more)] === [2022-11-16 16:09:45,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:09:45,988 INFO L85 PathProgramCache]: Analyzing trace with hash -1429362428, now seen corresponding path program 1 times [2022-11-16 16:09:45,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 16:09:45,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557197590] [2022-11-16 16:09:45,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:09:45,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 16:09:46,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:09:46,075 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:09:46,075 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 16:09:46,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557197590] [2022-11-16 16:09:46,075 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557197590] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:09:46,076 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 16:09:46,076 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 16:09:46,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823529764] [2022-11-16 16:09:46,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:09:46,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 16:09:46,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 16:09:46,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 16:09:46,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 16:09:46,079 INFO L87 Difference]: Start difference. First operand 29046 states and 108583 transitions. Second operand has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:09:46,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:09:46,793 INFO L93 Difference]: Finished difference Result 30145 states and 112578 transitions. [2022-11-16 16:09:46,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 16:09:46,793 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 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 12 [2022-11-16 16:09:46,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:09:47,008 INFO L225 Difference]: With dead ends: 30145 [2022-11-16 16:09:47,009 INFO L226 Difference]: Without dead ends: 30145 [2022-11-16 16:09:47,009 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 16:09:47,010 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 36 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 16:09:47,010 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 54 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-16 16:09:47,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30145 states. [2022-11-16 16:09:48,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30145 to 30145. [2022-11-16 16:09:48,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30145 states, 30093 states have (on average 3.741002891037783) internal successors, (112578), 30144 states have internal predecessors, (112578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:09:48,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30145 states to 30145 states and 112578 transitions. [2022-11-16 16:09:48,467 INFO L78 Accepts]: Start accepts. Automaton has 30145 states and 112578 transitions. Word has length 12 [2022-11-16 16:09:48,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:09:48,468 INFO L495 AbstractCegarLoop]: Abstraction has 30145 states and 112578 transitions. [2022-11-16 16:09:48,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:09:48,468 INFO L276 IsEmpty]: Start isEmpty. Operand 30145 states and 112578 transitions. [2022-11-16 16:09:48,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-16 16:09:48,470 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:09:48,470 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2022-11-16 16:09:48,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-16 16:09:48,471 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONDATA_RACE, thr1Err1ASSERT_VIOLATIONDATA_RACE, thr1Err2ASSERT_VIOLATIONDATA_RACE, thr1Err3ASSERT_VIOLATIONDATA_RACE (and 29 more)] === [2022-11-16 16:09:48,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:09:48,471 INFO L85 PathProgramCache]: Analyzing trace with hash -1517141967, now seen corresponding path program 1 times [2022-11-16 16:09:48,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 16:09:48,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570958722] [2022-11-16 16:09:48,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:09:48,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 16:09:48,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 16:09:48,490 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-16 16:09:48,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 16:09:48,509 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-16 16:09:48,515 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-16 16:09:48,515 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (32 of 33 remaining) [2022-11-16 16:09:48,516 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONDATA_RACE (31 of 33 remaining) [2022-11-16 16:09:48,517 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONDATA_RACE (30 of 33 remaining) [2022-11-16 16:09:48,517 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONDATA_RACE (29 of 33 remaining) [2022-11-16 16:09:48,517 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONDATA_RACE (28 of 33 remaining) [2022-11-16 16:09:48,517 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5ASSERT_VIOLATIONDATA_RACE (27 of 33 remaining) [2022-11-16 16:09:48,518 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6ASSERT_VIOLATIONDATA_RACE (26 of 33 remaining) [2022-11-16 16:09:48,518 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7ASSERT_VIOLATIONDATA_RACE (25 of 33 remaining) [2022-11-16 16:09:48,518 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONDATA_RACE (24 of 33 remaining) [2022-11-16 16:09:48,518 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONDATA_RACE (23 of 33 remaining) [2022-11-16 16:09:48,519 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONDATA_RACE (22 of 33 remaining) [2022-11-16 16:09:48,519 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONDATA_RACE (21 of 33 remaining) [2022-11-16 16:09:48,519 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONDATA_RACE (20 of 33 remaining) [2022-11-16 16:09:48,519 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5ASSERT_VIOLATIONDATA_RACE (19 of 33 remaining) [2022-11-16 16:09:48,520 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6ASSERT_VIOLATIONDATA_RACE (18 of 33 remaining) [2022-11-16 16:09:48,520 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7ASSERT_VIOLATIONDATA_RACE (17 of 33 remaining) [2022-11-16 16:09:48,520 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONDATA_RACE (16 of 33 remaining) [2022-11-16 16:09:48,520 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONDATA_RACE (15 of 33 remaining) [2022-11-16 16:09:48,520 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONDATA_RACE (14 of 33 remaining) [2022-11-16 16:09:48,521 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONDATA_RACE (13 of 33 remaining) [2022-11-16 16:09:48,521 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONDATA_RACE (12 of 33 remaining) [2022-11-16 16:09:48,521 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5ASSERT_VIOLATIONDATA_RACE (11 of 33 remaining) [2022-11-16 16:09:48,521 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6ASSERT_VIOLATIONDATA_RACE (10 of 33 remaining) [2022-11-16 16:09:48,522 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7ASSERT_VIOLATIONDATA_RACE (9 of 33 remaining) [2022-11-16 16:09:48,522 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONDATA_RACE (8 of 33 remaining) [2022-11-16 16:09:48,522 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONDATA_RACE (7 of 33 remaining) [2022-11-16 16:09:48,522 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONDATA_RACE (6 of 33 remaining) [2022-11-16 16:09:48,522 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONDATA_RACE (5 of 33 remaining) [2022-11-16 16:09:48,523 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONDATA_RACE (4 of 33 remaining) [2022-11-16 16:09:48,523 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5ASSERT_VIOLATIONDATA_RACE (3 of 33 remaining) [2022-11-16 16:09:48,523 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6ASSERT_VIOLATIONDATA_RACE (2 of 33 remaining) [2022-11-16 16:09:48,527 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7ASSERT_VIOLATIONDATA_RACE (1 of 33 remaining) [2022-11-16 16:09:48,528 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONDATA_RACE (0 of 33 remaining) [2022-11-16 16:09:48,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-16 16:09:48,529 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-11-16 16:09:48,529 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-16 16:09:48,529 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-11-16 16:09:48,578 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-16 16:09:48,581 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-16 16:09:48,581 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 273 places, 285 transitions, 602 flow [2022-11-16 16:09:48,582 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 273 places, 285 transitions, 602 flow [2022-11-16 16:09:48,582 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 273 places, 285 transitions, 602 flow [2022-11-16 16:09:48,677 INFO L130 PetriNetUnfolder]: 25/335 cut-off events. [2022-11-16 16:09:48,677 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-11-16 16:09:48,684 INFO L83 FinitePrefix]: Finished finitePrefix Result has 358 conditions, 335 events. 25/335 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1081 event pairs, 0 based on Foata normal form. 0/273 useless extension candidates. Maximal degree in co-relation 268. Up to 10 conditions per place. [2022-11-16 16:09:48,710 INFO L119 LiptonReduction]: Number of co-enabled transitions 52216 [2022-11-16 16:09:57,538 INFO L134 LiptonReduction]: Checked pairs total: 145079 [2022-11-16 16:09:57,538 INFO L136 LiptonReduction]: Total number of compositions: 267 [2022-11-16 16:09:57,540 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 103 places, 106 transitions, 244 flow