./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/no-data-race.prp --file ../../../trunk/examples/svcomp/goblint-regression/10-synch_02-thread_nonunique.i --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --architecture 32bit -------------------------------------------------------------------------------- Checking for data races Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/goblint-regression/10-synch_02-thread_nonunique.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DataRace-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --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 Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 2b48d13cab05bc3b998f8de65b383ec2ee92eaa2c6f230f8a23e235950b9a5ba --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-31 20:35:46,168 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-31 20:35:46,171 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-31 20:35:46,215 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-31 20:35:46,216 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-31 20:35:46,219 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-31 20:35:46,221 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-31 20:35:46,223 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-31 20:35:46,225 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-31 20:35:46,230 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-31 20:35:46,231 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-31 20:35:46,233 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-31 20:35:46,233 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-31 20:35:46,235 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-31 20:35:46,236 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-31 20:35:46,241 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-31 20:35:46,242 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-31 20:35:46,244 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-31 20:35:46,245 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-31 20:35:46,250 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-31 20:35:46,260 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-31 20:35:46,261 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-31 20:35:46,262 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-31 20:35:46,263 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-31 20:35:46,269 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-31 20:35:46,270 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-31 20:35:46,270 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-31 20:35:46,272 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-31 20:35:46,272 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-31 20:35:46,273 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-31 20:35:46,273 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-31 20:35:46,275 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-31 20:35:46,277 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-31 20:35:46,277 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-31 20:35:46,278 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-31 20:35:46,279 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-31 20:35:46,279 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-31 20:35:46,279 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-31 20:35:46,280 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-31 20:35:46,280 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-31 20:35:46,281 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-31 20:35:46,282 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DataRace-32bit-Automizer_Default.epf [2023-08-31 20:35:46,315 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-31 20:35:46,315 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-31 20:35:46,316 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-31 20:35:46,317 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-31 20:35:46,317 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-31 20:35:46,318 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-31 20:35:46,318 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-31 20:35:46,318 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-31 20:35:46,319 INFO L138 SettingsManager]: * Use SBE=true [2023-08-31 20:35:46,319 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-31 20:35:46,320 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-31 20:35:46,320 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-31 20:35:46,320 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-31 20:35:46,320 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-31 20:35:46,320 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-31 20:35:46,321 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-31 20:35:46,321 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-31 20:35:46,321 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-31 20:35:46,321 INFO L138 SettingsManager]: * Check absence of data races in concurrent programs=true [2023-08-31 20:35:46,321 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-31 20:35:46,322 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-31 20:35:46,322 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-31 20:35:46,322 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-31 20:35:46,322 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-31 20:35:46,322 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-31 20:35:46,323 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-31 20:35:46,323 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 20:35:46,323 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-31 20:35:46,323 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-31 20:35:46,323 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-31 20:35:46,324 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-31 20:35:46,324 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-31 20:35:46,324 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-31 20:35:46,324 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-31 20:35:46,324 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-31 20:35:46,325 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-31 20:35:46,325 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-31 20:35:46,325 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! data-race) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2b48d13cab05bc3b998f8de65b383ec2ee92eaa2c6f230f8a23e235950b9a5ba Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-08-31 20:35:46,612 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-31 20:35:46,630 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-31 20:35:46,633 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-31 20:35:46,634 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-31 20:35:46,634 INFO L275 PluginConnector]: CDTParser initialized [2023-08-31 20:35:46,635 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/10-synch_02-thread_nonunique.i [2023-08-31 20:35:47,947 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-31 20:35:48,217 INFO L351 CDTParser]: Found 1 translation units. [2023-08-31 20:35:48,218 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/10-synch_02-thread_nonunique.i [2023-08-31 20:35:48,232 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/be27f03a7/25ea98277ef74e81b4d4a85e230432b5/FLAGec91e4d62 [2023-08-31 20:35:48,247 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/be27f03a7/25ea98277ef74e81b4d4a85e230432b5 [2023-08-31 20:35:48,250 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-31 20:35:48,251 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-31 20:35:48,252 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-31 20:35:48,252 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-31 20:35:48,255 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-31 20:35:48,256 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 08:35:48" (1/1) ... [2023-08-31 20:35:48,257 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a14eabe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 08:35:48, skipping insertion in model container [2023-08-31 20:35:48,257 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 08:35:48" (1/1) ... [2023-08-31 20:35:48,263 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-31 20:35:48,316 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-31 20:35:48,743 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 20:35:48,751 INFO L203 MainTranslator]: Completed pre-run [2023-08-31 20:35:48,805 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 20:35:48,865 INFO L208 MainTranslator]: Completed translation [2023-08-31 20:35:48,865 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 08:35:48 WrapperNode [2023-08-31 20:35:48,865 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-31 20:35:48,866 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-31 20:35:48,866 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-31 20:35:48,866 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-31 20:35:48,871 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 08:35:48" (1/1) ... [2023-08-31 20:35:48,891 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 08:35:48" (1/1) ... [2023-08-31 20:35:48,908 INFO L138 Inliner]: procedures = 259, calls = 8, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 44 [2023-08-31 20:35:48,908 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-31 20:35:48,909 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-31 20:35:48,909 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-31 20:35:48,909 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-31 20:35:48,916 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 08:35:48" (1/1) ... [2023-08-31 20:35:48,917 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 08:35:48" (1/1) ... [2023-08-31 20:35:48,919 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 08:35:48" (1/1) ... [2023-08-31 20:35:48,920 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 08:35:48" (1/1) ... [2023-08-31 20:35:48,925 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 08:35:48" (1/1) ... [2023-08-31 20:35:48,928 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 08:35:48" (1/1) ... [2023-08-31 20:35:48,929 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 08:35:48" (1/1) ... [2023-08-31 20:35:48,930 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 08:35:48" (1/1) ... [2023-08-31 20:35:48,932 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-31 20:35:48,933 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-31 20:35:48,933 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-31 20:35:48,933 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-31 20:35:48,934 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 08:35:48" (1/1) ... [2023-08-31 20:35:48,939 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 20:35:48,964 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 20:35:48,986 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-31 20:35:49,015 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-31 20:35:49,026 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-31 20:35:49,026 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-31 20:35:49,026 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-31 20:35:49,026 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-31 20:35:49,027 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-08-31 20:35:49,027 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-08-31 20:35:49,027 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-31 20:35:49,027 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-31 20:35:49,028 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-31 20:35:49,200 INFO L236 CfgBuilder]: Building ICFG [2023-08-31 20:35:49,202 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-31 20:35:49,322 INFO L277 CfgBuilder]: Performing block encoding [2023-08-31 20:35:49,327 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-31 20:35:49,328 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-08-31 20:35:49,329 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 08:35:49 BoogieIcfgContainer [2023-08-31 20:35:49,330 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-31 20:35:49,331 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-31 20:35:49,331 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-31 20:35:49,334 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-31 20:35:49,334 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.08 08:35:48" (1/3) ... [2023-08-31 20:35:49,335 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d709d8d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 08:35:49, skipping insertion in model container [2023-08-31 20:35:49,335 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 08:35:48" (2/3) ... [2023-08-31 20:35:49,335 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d709d8d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 08:35:49, skipping insertion in model container [2023-08-31 20:35:49,335 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 08:35:49" (3/3) ... [2023-08-31 20:35:49,336 INFO L112 eAbstractionObserver]: Analyzing ICFG 10-synch_02-thread_nonunique.i [2023-08-31 20:35:49,343 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-31 20:35:49,352 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-31 20:35:49,352 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-08-31 20:35:49,352 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-31 20:35:49,405 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-08-31 20:35:49,434 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 52 transitions, 112 flow [2023-08-31 20:35:49,478 INFO L130 PetriNetUnfolder]: 5/74 cut-off events. [2023-08-31 20:35:49,481 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-31 20:35:49,484 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80 conditions, 74 events. 5/74 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 124 event pairs, 0 based on Foata normal form. 0/63 useless extension candidates. Maximal degree in co-relation 36. Up to 4 conditions per place. [2023-08-31 20:35:49,485 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 52 transitions, 112 flow [2023-08-31 20:35:49,488 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 32 places, 29 transitions, 63 flow [2023-08-31 20:35:49,491 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 20:35:49,506 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 32 places, 29 transitions, 63 flow [2023-08-31 20:35:49,515 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 32 places, 29 transitions, 63 flow [2023-08-31 20:35:49,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 32 places, 29 transitions, 63 flow [2023-08-31 20:35:49,524 INFO L130 PetriNetUnfolder]: 0/33 cut-off events. [2023-08-31 20:35:49,525 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-31 20:35:49,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38 conditions, 33 events. 0/33 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 19 event pairs, 0 based on Foata normal form. 0/32 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2023-08-31 20:35:49,525 INFO L119 LiptonReduction]: Number of co-enabled transitions 180 [2023-08-31 20:35:50,305 INFO L134 LiptonReduction]: Checked pairs total: 170 [2023-08-31 20:35:50,306 INFO L136 LiptonReduction]: Total number of compositions: 29 [2023-08-31 20:35:50,318 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 20:35:50,324 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=PETRI_NET, 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;@31147831, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 20:35:50,324 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 20:35:50,327 INFO L130 PetriNetUnfolder]: 0/5 cut-off events. [2023-08-31 20:35:50,327 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-31 20:35:50,327 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 20:35:50,328 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-31 20:35:50,328 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 20:35:50,332 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 20:35:50,333 INFO L85 PathProgramCache]: Analyzing trace with hash 5881575, now seen corresponding path program 1 times [2023-08-31 20:35:50,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 20:35:50,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587984301] [2023-08-31 20:35:50,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 20:35:50,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 20:35:50,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 20:35:50,445 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 20:35:50,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 20:35:50,475 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 20:35:50,476 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 20:35:50,477 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 20:35:50,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-31 20:35:50,479 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 20:35:50,482 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 20:35:50,483 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 20:35:50,483 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-31 20:35:50,497 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-31 20:35:50,499 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 64 places, 63 transitions, 144 flow [2023-08-31 20:35:50,523 INFO L130 PetriNetUnfolder]: 10/137 cut-off events. [2023-08-31 20:35:50,523 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-31 20:35:50,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 151 conditions, 137 events. 10/137 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 278 event pairs, 0 based on Foata normal form. 0/117 useless extension candidates. Maximal degree in co-relation 76. Up to 8 conditions per place. [2023-08-31 20:35:50,525 INFO L82 GeneralOperation]: Start removeDead. Operand has 64 places, 63 transitions, 144 flow [2023-08-31 20:35:50,525 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 44 places, 39 transitions, 90 flow [2023-08-31 20:35:50,526 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 20:35:50,526 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 44 places, 39 transitions, 90 flow [2023-08-31 20:35:50,526 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 44 places, 39 transitions, 90 flow [2023-08-31 20:35:50,526 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 44 places, 39 transitions, 90 flow [2023-08-31 20:35:50,534 INFO L130 PetriNetUnfolder]: 0/52 cut-off events. [2023-08-31 20:35:50,535 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-31 20:35:50,535 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62 conditions, 52 events. 0/52 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 37 event pairs, 0 based on Foata normal form. 0/50 useless extension candidates. Maximal degree in co-relation 0. Up to 3 conditions per place. [2023-08-31 20:35:50,536 INFO L119 LiptonReduction]: Number of co-enabled transitions 540 [2023-08-31 20:35:51,272 INFO L134 LiptonReduction]: Checked pairs total: 1172 [2023-08-31 20:35:51,272 INFO L136 LiptonReduction]: Total number of compositions: 28 [2023-08-31 20:35:51,274 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 20:35:51,275 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=PETRI_NET, 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;@31147831, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 20:35:51,275 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 20:35:51,281 INFO L130 PetriNetUnfolder]: 0/13 cut-off events. [2023-08-31 20:35:51,282 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-31 20:35:51,282 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 20:35:51,283 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1] [2023-08-31 20:35:51,283 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 20:35:51,284 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 20:35:51,284 INFO L85 PathProgramCache]: Analyzing trace with hash -16416320, now seen corresponding path program 1 times [2023-08-31 20:35:51,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 20:35:51,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240549114] [2023-08-31 20:35:51,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 20:35:51,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 20:35:51,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 20:35:51,321 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 20:35:51,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 20:35:51,354 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 20:35:51,354 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 20:35:51,354 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 20:35:51,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-31 20:35:51,355 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 20:35:51,355 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 20:35:51,355 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 20:35:51,355 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-31 20:35:51,372 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-31 20:35:51,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 76 places, 74 transitions, 178 flow [2023-08-31 20:35:51,444 INFO L130 PetriNetUnfolder]: 20/243 cut-off events. [2023-08-31 20:35:51,445 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-31 20:35:51,447 INFO L83 FinitePrefix]: Finished finitePrefix Result has 271 conditions, 243 events. 20/243 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 662 event pairs, 1 based on Foata normal form. 0/208 useless extension candidates. Maximal degree in co-relation 147. Up to 16 conditions per place. [2023-08-31 20:35:51,447 INFO L82 GeneralOperation]: Start removeDead. Operand has 76 places, 74 transitions, 178 flow [2023-08-31 20:35:51,448 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 56 places, 49 transitions, 119 flow [2023-08-31 20:35:51,449 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 20:35:51,449 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 56 places, 49 transitions, 119 flow [2023-08-31 20:35:51,450 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 56 places, 49 transitions, 119 flow [2023-08-31 20:35:51,453 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 56 places, 49 transitions, 119 flow [2023-08-31 20:35:51,460 INFO L130 PetriNetUnfolder]: 0/71 cut-off events. [2023-08-31 20:35:51,464 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-31 20:35:51,464 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87 conditions, 71 events. 0/71 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 57 event pairs, 0 based on Foata normal form. 0/68 useless extension candidates. Maximal degree in co-relation 0. Up to 4 conditions per place. [2023-08-31 20:35:51,466 INFO L119 LiptonReduction]: Number of co-enabled transitions 1080 [2023-08-31 20:35:52,124 INFO L134 LiptonReduction]: Checked pairs total: 2454 [2023-08-31 20:35:52,125 INFO L136 LiptonReduction]: Total number of compositions: 33 [2023-08-31 20:35:52,126 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 20:35:52,127 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=PETRI_NET, 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;@31147831, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 20:35:52,128 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 20:35:52,130 INFO L130 PetriNetUnfolder]: 0/20 cut-off events. [2023-08-31 20:35:52,131 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-31 20:35:52,131 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 20:35:52,131 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1] [2023-08-31 20:35:52,131 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 20:35:52,132 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 20:35:52,132 INFO L85 PathProgramCache]: Analyzing trace with hash 1220557640, now seen corresponding path program 1 times [2023-08-31 20:35:52,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 20:35:52,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382483912] [2023-08-31 20:35:52,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 20:35:52,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 20:35:52,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 20:35:52,151 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 20:35:52,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 20:35:52,170 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 20:35:52,170 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 20:35:52,171 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 20:35:52,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-31 20:35:52,171 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 20:35:52,172 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 20:35:52,172 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 20:35:52,172 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-08-31 20:35:52,188 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-31 20:35:52,196 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 88 places, 85 transitions, 214 flow [2023-08-31 20:35:52,256 INFO L130 PetriNetUnfolder]: 42/437 cut-off events. [2023-08-31 20:35:52,256 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-08-31 20:35:52,258 INFO L83 FinitePrefix]: Finished finitePrefix Result has 492 conditions, 437 events. 42/437 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 1536 event pairs, 6 based on Foata normal form. 0/375 useless extension candidates. Maximal degree in co-relation 267. Up to 32 conditions per place. [2023-08-31 20:35:52,258 INFO L82 GeneralOperation]: Start removeDead. Operand has 88 places, 85 transitions, 214 flow [2023-08-31 20:35:52,260 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 68 places, 59 transitions, 150 flow [2023-08-31 20:35:52,261 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 20:35:52,261 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 68 places, 59 transitions, 150 flow [2023-08-31 20:35:52,261 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 68 places, 59 transitions, 150 flow [2023-08-31 20:35:52,261 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 68 places, 59 transitions, 150 flow [2023-08-31 20:35:52,269 INFO L130 PetriNetUnfolder]: 0/90 cut-off events. [2023-08-31 20:35:52,269 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-08-31 20:35:52,269 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113 conditions, 90 events. 0/90 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 76 event pairs, 0 based on Foata normal form. 0/86 useless extension candidates. Maximal degree in co-relation 0. Up to 5 conditions per place. [2023-08-31 20:35:52,271 INFO L119 LiptonReduction]: Number of co-enabled transitions 1800 [2023-08-31 20:35:52,983 INFO L134 LiptonReduction]: Checked pairs total: 4057 [2023-08-31 20:35:52,983 INFO L136 LiptonReduction]: Total number of compositions: 38 [2023-08-31 20:35:52,984 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 20:35:52,985 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=PETRI_NET, 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;@31147831, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 20:35:52,985 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 20:35:52,988 INFO L130 PetriNetUnfolder]: 0/27 cut-off events. [2023-08-31 20:35:52,989 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-08-31 20:35:52,989 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 20:35:52,989 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1] [2023-08-31 20:35:52,989 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 20:35:52,990 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 20:35:52,990 INFO L85 PathProgramCache]: Analyzing trace with hash 435087825, now seen corresponding path program 1 times [2023-08-31 20:35:52,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 20:35:52,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702286859] [2023-08-31 20:35:52,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 20:35:52,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 20:35:53,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 20:35:53,012 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 20:35:53,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 20:35:53,033 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 20:35:53,036 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 20:35:53,036 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 20:35:53,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-31 20:35:53,036 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 20:35:53,040 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 20:35:53,040 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 20:35:53,040 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-08-31 20:35:53,057 INFO L144 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2023-08-31 20:35:53,065 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 100 places, 96 transitions, 252 flow [2023-08-31 20:35:53,166 INFO L130 PetriNetUnfolder]: 92/811 cut-off events. [2023-08-31 20:35:53,167 INFO L131 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2023-08-31 20:35:53,172 INFO L83 FinitePrefix]: Finished finitePrefix Result has 922 conditions, 811 events. 92/811 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 3783 event pairs, 23 based on Foata normal form. 0/698 useless extension candidates. Maximal degree in co-relation 488. Up to 80 conditions per place. [2023-08-31 20:35:53,172 INFO L82 GeneralOperation]: Start removeDead. Operand has 100 places, 96 transitions, 252 flow [2023-08-31 20:35:53,174 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 80 places, 69 transitions, 183 flow [2023-08-31 20:35:53,174 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 20:35:53,174 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 80 places, 69 transitions, 183 flow [2023-08-31 20:35:53,174 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 80 places, 69 transitions, 183 flow [2023-08-31 20:35:53,174 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 80 places, 69 transitions, 183 flow [2023-08-31 20:35:53,182 INFO L130 PetriNetUnfolder]: 0/109 cut-off events. [2023-08-31 20:35:53,182 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-08-31 20:35:53,183 INFO L83 FinitePrefix]: Finished finitePrefix Result has 140 conditions, 109 events. 0/109 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 95 event pairs, 0 based on Foata normal form. 0/104 useless extension candidates. Maximal degree in co-relation 0. Up to 6 conditions per place. [2023-08-31 20:35:53,186 INFO L119 LiptonReduction]: Number of co-enabled transitions 2700 [2023-08-31 20:35:53,930 INFO L134 LiptonReduction]: Checked pairs total: 6738 [2023-08-31 20:35:53,930 INFO L136 LiptonReduction]: Total number of compositions: 43 [2023-08-31 20:35:53,932 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 20:35:53,932 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=PETRI_NET, 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;@31147831, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 20:35:53,932 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 20:35:53,935 INFO L130 PetriNetUnfolder]: 0/34 cut-off events. [2023-08-31 20:35:53,936 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-08-31 20:35:53,936 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 20:35:53,936 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 20:35:53,936 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 20:35:53,937 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 20:35:53,937 INFO L85 PathProgramCache]: Analyzing trace with hash 1865691875, now seen corresponding path program 1 times [2023-08-31 20:35:53,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 20:35:53,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831965582] [2023-08-31 20:35:53,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 20:35:53,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 20:35:53,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 20:35:53,958 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 20:35:53,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 20:35:53,976 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 20:35:53,976 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 20:35:53,977 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 20:35:53,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-31 20:35:53,977 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 20:35:53,978 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 20:35:53,978 WARN L233 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 20:35:53,978 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2023-08-31 20:35:53,994 INFO L144 ThreadInstanceAdder]: Constructed 6 joinOtherThreadTransitions. [2023-08-31 20:35:53,996 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 112 places, 107 transitions, 292 flow [2023-08-31 20:35:54,175 INFO L130 PetriNetUnfolder]: 206/1553 cut-off events. [2023-08-31 20:35:54,175 INFO L131 PetriNetUnfolder]: For 242/242 co-relation queries the response was YES. [2023-08-31 20:35:54,182 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1785 conditions, 1553 events. 206/1553 cut-off events. For 242/242 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 9403 event pairs, 72 based on Foata normal form. 0/1341 useless extension candidates. Maximal degree in co-relation 918. Up to 192 conditions per place. [2023-08-31 20:35:54,182 INFO L82 GeneralOperation]: Start removeDead. Operand has 112 places, 107 transitions, 292 flow [2023-08-31 20:35:54,184 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 92 places, 79 transitions, 218 flow [2023-08-31 20:35:54,184 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 20:35:54,184 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 92 places, 79 transitions, 218 flow [2023-08-31 20:35:54,185 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 92 places, 79 transitions, 218 flow [2023-08-31 20:35:54,185 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 92 places, 79 transitions, 218 flow [2023-08-31 20:35:54,195 INFO L130 PetriNetUnfolder]: 0/128 cut-off events. [2023-08-31 20:35:54,195 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2023-08-31 20:35:54,195 INFO L83 FinitePrefix]: Finished finitePrefix Result has 168 conditions, 128 events. 0/128 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 109 event pairs, 0 based on Foata normal form. 0/122 useless extension candidates. Maximal degree in co-relation 0. Up to 7 conditions per place. [2023-08-31 20:35:54,198 INFO L119 LiptonReduction]: Number of co-enabled transitions 3780 [2023-08-31 20:35:54,930 INFO L134 LiptonReduction]: Checked pairs total: 8970 [2023-08-31 20:35:54,931 INFO L136 LiptonReduction]: Total number of compositions: 47 [2023-08-31 20:35:54,932 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 20:35:54,932 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=PETRI_NET, 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;@31147831, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 20:35:54,933 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 20:35:54,936 INFO L130 PetriNetUnfolder]: 0/41 cut-off events. [2023-08-31 20:35:54,937 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2023-08-31 20:35:54,937 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 20:35:54,937 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 20:35:54,937 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 20:35:54,937 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 20:35:54,938 INFO L85 PathProgramCache]: Analyzing trace with hash -1324005629, now seen corresponding path program 1 times [2023-08-31 20:35:54,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 20:35:54,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594879806] [2023-08-31 20:35:54,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 20:35:54,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 20:35:54,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 20:35:54,986 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 20:35:54,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 20:35:55,014 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 20:35:55,018 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 20:35:55,018 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 20:35:55,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-31 20:35:55,018 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 20:35:55,022 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 20:35:55,023 WARN L233 ceAbstractionStarter]: 6 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 20:35:55,023 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 7 thread instances. [2023-08-31 20:35:55,047 INFO L144 ThreadInstanceAdder]: Constructed 7 joinOtherThreadTransitions. [2023-08-31 20:35:55,048 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 124 places, 118 transitions, 334 flow [2023-08-31 20:35:55,455 INFO L130 PetriNetUnfolder]: 464/3047 cut-off events. [2023-08-31 20:35:55,455 INFO L131 PetriNetUnfolder]: For 525/525 co-relation queries the response was YES. [2023-08-31 20:35:55,470 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3545 conditions, 3047 events. 464/3047 cut-off events. For 525/525 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 22447 event pairs, 201 based on Foata normal form. 0/2640 useless extension candidates. Maximal degree in co-relation 1781. Up to 448 conditions per place. [2023-08-31 20:35:55,471 INFO L82 GeneralOperation]: Start removeDead. Operand has 124 places, 118 transitions, 334 flow [2023-08-31 20:35:55,473 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 104 places, 89 transitions, 255 flow [2023-08-31 20:35:55,473 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 20:35:55,474 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 104 places, 89 transitions, 255 flow [2023-08-31 20:35:55,474 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 104 places, 89 transitions, 255 flow [2023-08-31 20:35:55,474 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 104 places, 89 transitions, 255 flow [2023-08-31 20:35:55,506 INFO L130 PetriNetUnfolder]: 0/147 cut-off events. [2023-08-31 20:35:55,507 INFO L131 PetriNetUnfolder]: For 77/77 co-relation queries the response was YES. [2023-08-31 20:35:55,507 INFO L83 FinitePrefix]: Finished finitePrefix Result has 197 conditions, 147 events. 0/147 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 127 event pairs, 0 based on Foata normal form. 0/140 useless extension candidates. Maximal degree in co-relation 0. Up to 8 conditions per place. [2023-08-31 20:35:55,511 INFO L119 LiptonReduction]: Number of co-enabled transitions 5040 [2023-08-31 20:35:56,296 INFO L134 LiptonReduction]: Checked pairs total: 12241 [2023-08-31 20:35:56,296 INFO L136 LiptonReduction]: Total number of compositions: 52 [2023-08-31 20:35:56,298 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 20:35:56,298 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=PETRI_NET, 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;@31147831, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 20:35:56,298 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 20:35:56,302 INFO L130 PetriNetUnfolder]: 0/48 cut-off events. [2023-08-31 20:35:56,303 INFO L131 PetriNetUnfolder]: For 77/77 co-relation queries the response was YES. [2023-08-31 20:35:56,303 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 20:35:56,303 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 20:35:56,303 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 20:35:56,304 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 20:35:56,304 INFO L85 PathProgramCache]: Analyzing trace with hash -96844259, now seen corresponding path program 1 times [2023-08-31 20:35:56,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 20:35:56,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149382175] [2023-08-31 20:35:56,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 20:35:56,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 20:35:56,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 20:35:56,336 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 20:35:56,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 20:35:56,388 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 20:35:56,397 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 20:35:56,397 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 20:35:56,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-31 20:35:56,397 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 20:35:56,398 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 20:35:56,398 WARN L233 ceAbstractionStarter]: 7 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 20:35:56,398 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 8 thread instances. [2023-08-31 20:35:56,434 INFO L144 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2023-08-31 20:35:56,436 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 136 places, 129 transitions, 378 flow [2023-08-31 20:35:57,313 INFO L130 PetriNetUnfolder]: 1042/6077 cut-off events. [2023-08-31 20:35:57,314 INFO L131 PetriNetUnfolder]: For 1136/1136 co-relation queries the response was YES. [2023-08-31 20:35:57,338 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7162 conditions, 6077 events. 1042/6077 cut-off events. For 1136/1136 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 53399 event pairs, 522 based on Foata normal form. 0/5283 useless extension candidates. Maximal degree in co-relation 3541. Up to 1024 conditions per place. [2023-08-31 20:35:57,338 INFO L82 GeneralOperation]: Start removeDead. Operand has 136 places, 129 transitions, 378 flow [2023-08-31 20:35:57,341 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 116 places, 99 transitions, 294 flow [2023-08-31 20:35:57,341 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 20:35:57,341 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 116 places, 99 transitions, 294 flow [2023-08-31 20:35:57,342 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 116 places, 99 transitions, 294 flow [2023-08-31 20:35:57,342 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 116 places, 99 transitions, 294 flow [2023-08-31 20:35:57,356 INFO L130 PetriNetUnfolder]: 0/166 cut-off events. [2023-08-31 20:35:57,356 INFO L131 PetriNetUnfolder]: For 112/112 co-relation queries the response was YES. [2023-08-31 20:35:57,356 INFO L83 FinitePrefix]: Finished finitePrefix Result has 227 conditions, 166 events. 0/166 cut-off events. For 112/112 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 145 event pairs, 0 based on Foata normal form. 0/158 useless extension candidates. Maximal degree in co-relation 0. Up to 9 conditions per place. [2023-08-31 20:35:57,361 INFO L119 LiptonReduction]: Number of co-enabled transitions 6480 [2023-08-31 20:35:58,150 INFO L134 LiptonReduction]: Checked pairs total: 15788 [2023-08-31 20:35:58,151 INFO L136 LiptonReduction]: Total number of compositions: 57 [2023-08-31 20:35:58,152 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 20:35:58,152 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=PETRI_NET, 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;@31147831, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 20:35:58,153 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 20:35:58,159 INFO L130 PetriNetUnfolder]: 0/55 cut-off events. [2023-08-31 20:35:58,159 INFO L131 PetriNetUnfolder]: For 112/112 co-relation queries the response was YES. [2023-08-31 20:35:58,159 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 20:35:58,159 INFO L208 CegarLoopForPetriNet]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 20:35:58,160 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 20:35:58,160 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 20:35:58,160 INFO L85 PathProgramCache]: Analyzing trace with hash -2059239916, now seen corresponding path program 1 times [2023-08-31 20:35:58,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 20:35:58,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632863300] [2023-08-31 20:35:58,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 20:35:58,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 20:35:58,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 20:35:58,186 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 20:35:58,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 20:35:58,217 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 20:35:58,218 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 20:35:58,218 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 20:35:58,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-31 20:35:58,218 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 20:35:58,219 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 20:35:58,219 WARN L233 ceAbstractionStarter]: 8 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 20:35:58,219 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 9 thread instances. [2023-08-31 20:35:58,243 INFO L144 ThreadInstanceAdder]: Constructed 9 joinOtherThreadTransitions. [2023-08-31 20:35:58,246 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 148 places, 140 transitions, 424 flow [2023-08-31 20:36:00,155 INFO L130 PetriNetUnfolder]: 2324/12243 cut-off events. [2023-08-31 20:36:00,155 INFO L131 PetriNetUnfolder]: For 2460/2460 co-relation queries the response was YES. [2023-08-31 20:36:00,201 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14620 conditions, 12243 events. 2324/12243 cut-off events. For 2460/2460 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 124452 event pairs, 1291 based on Foata normal form. 0/10678 useless extension candidates. Maximal degree in co-relation 7158. Up to 2304 conditions per place. [2023-08-31 20:36:00,202 INFO L82 GeneralOperation]: Start removeDead. Operand has 148 places, 140 transitions, 424 flow [2023-08-31 20:36:00,207 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 128 places, 109 transitions, 335 flow [2023-08-31 20:36:00,207 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 20:36:00,207 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 128 places, 109 transitions, 335 flow [2023-08-31 20:36:00,208 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 128 places, 109 transitions, 335 flow [2023-08-31 20:36:00,208 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 128 places, 109 transitions, 335 flow [2023-08-31 20:36:00,219 INFO L130 PetriNetUnfolder]: 0/185 cut-off events. [2023-08-31 20:36:00,219 INFO L131 PetriNetUnfolder]: For 156/156 co-relation queries the response was YES. [2023-08-31 20:36:00,219 INFO L83 FinitePrefix]: Finished finitePrefix Result has 258 conditions, 185 events. 0/185 cut-off events. For 156/156 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 162 event pairs, 0 based on Foata normal form. 0/176 useless extension candidates. Maximal degree in co-relation 0. Up to 10 conditions per place. [2023-08-31 20:36:00,224 INFO L119 LiptonReduction]: Number of co-enabled transitions 8100 [2023-08-31 20:36:00,975 INFO L134 LiptonReduction]: Checked pairs total: 19794 [2023-08-31 20:36:00,975 INFO L136 LiptonReduction]: Total number of compositions: 62 [2023-08-31 20:36:00,976 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 20:36:00,976 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=PETRI_NET, 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;@31147831, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 20:36:00,977 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 20:36:00,982 INFO L130 PetriNetUnfolder]: 0/62 cut-off events. [2023-08-31 20:36:00,982 INFO L131 PetriNetUnfolder]: For 156/156 co-relation queries the response was YES. [2023-08-31 20:36:00,982 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 20:36:00,983 INFO L208 CegarLoopForPetriNet]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 20:36:00,983 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 20:36:00,983 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 20:36:00,983 INFO L85 PathProgramCache]: Analyzing trace with hash -342950026, now seen corresponding path program 1 times [2023-08-31 20:36:00,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 20:36:00,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128628522] [2023-08-31 20:36:00,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 20:36:00,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 20:36:01,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 20:36:01,005 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 20:36:01,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 20:36:01,024 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 20:36:01,024 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 20:36:01,024 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 20:36:01,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-31 20:36:01,025 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 20:36:01,025 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 20:36:01,025 WARN L233 ceAbstractionStarter]: 9 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 20:36:01,025 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 10 thread instances. [2023-08-31 20:36:01,049 INFO L144 ThreadInstanceAdder]: Constructed 10 joinOtherThreadTransitions. [2023-08-31 20:36:01,051 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 160 places, 151 transitions, 472 flow [2023-08-31 20:36:04,137 INFO L130 PetriNetUnfolder]: 5142/24809 cut-off events. [2023-08-31 20:36:04,137 INFO L131 PetriNetUnfolder]: For 5330/5330 co-relation queries the response was YES. [2023-08-31 20:36:04,248 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30015 conditions, 24809 events. 5142/24809 cut-off events. For 5330/5330 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 282418 event pairs, 3084 based on Foata normal form. 0/21705 useless extension candidates. Maximal degree in co-relation 14616. Up to 5120 conditions per place. [2023-08-31 20:36:04,248 INFO L82 GeneralOperation]: Start removeDead. Operand has 160 places, 151 transitions, 472 flow [2023-08-31 20:36:04,260 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 140 places, 119 transitions, 378 flow [2023-08-31 20:36:04,261 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 20:36:04,261 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 140 places, 119 transitions, 378 flow [2023-08-31 20:36:04,261 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 140 places, 119 transitions, 378 flow [2023-08-31 20:36:04,261 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 140 places, 119 transitions, 378 flow [2023-08-31 20:36:04,280 INFO L130 PetriNetUnfolder]: 0/204 cut-off events. [2023-08-31 20:36:04,280 INFO L131 PetriNetUnfolder]: For 210/210 co-relation queries the response was YES. [2023-08-31 20:36:04,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 290 conditions, 204 events. 0/204 cut-off events. For 210/210 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 182 event pairs, 0 based on Foata normal form. 0/194 useless extension candidates. Maximal degree in co-relation 0. Up to 11 conditions per place. [2023-08-31 20:36:04,285 INFO L119 LiptonReduction]: Number of co-enabled transitions 9900 [2023-08-31 20:36:05,161 INFO L134 LiptonReduction]: Checked pairs total: 23929 [2023-08-31 20:36:05,161 INFO L136 LiptonReduction]: Total number of compositions: 67 [2023-08-31 20:36:05,162 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 20:36:05,162 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=PETRI_NET, 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;@31147831, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 20:36:05,162 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 20:36:05,308 INFO L130 PetriNetUnfolder]: 0/69 cut-off events. [2023-08-31 20:36:05,308 INFO L131 PetriNetUnfolder]: For 210/210 co-relation queries the response was YES. [2023-08-31 20:36:05,308 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 20:36:05,309 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 20:36:05,309 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 20:36:05,309 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 20:36:05,309 INFO L85 PathProgramCache]: Analyzing trace with hash 1098496261, now seen corresponding path program 1 times [2023-08-31 20:36:05,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 20:36:05,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480835153] [2023-08-31 20:36:05,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 20:36:05,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 20:36:05,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 20:36:05,567 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 145 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 20:36:05,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 20:36:05,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480835153] [2023-08-31 20:36:05,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480835153] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 20:36:05,568 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 20:36:05,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-08-31 20:36:05,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701472377] [2023-08-31 20:36:05,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 20:36:05,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-31 20:36:05,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 20:36:05,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-31 20:36:05,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2023-08-31 20:36:05,744 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 218 [2023-08-31 20:36:05,748 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 54 transitions, 248 flow. Second operand has 12 states, 12 states have (on average 122.75) internal successors, (1473), 12 states have internal predecessors, (1473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 20:36:05,748 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 20:36:05,748 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 218 [2023-08-31 20:36:05,749 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand