./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/no-data-race.prp --file ../../../trunk/examples/svcomp/pthread-ext/40_barrier_vf.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/pthread-ext/40_barrier_vf.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 5eef73b6b2655059556d731e3a5babc181132142f2417a2cf863165dd8efda84 --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 11:55:51,329 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-31 11:55:51,331 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-31 11:55:51,364 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-31 11:55:51,366 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-31 11:55:51,367 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-31 11:55:51,368 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-31 11:55:51,370 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-31 11:55:51,372 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-31 11:55:51,375 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-31 11:55:51,376 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-31 11:55:51,377 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-31 11:55:51,378 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-31 11:55:51,379 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-31 11:55:51,380 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-31 11:55:51,384 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-31 11:55:51,384 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-31 11:55:51,385 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-31 11:55:51,386 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-31 11:55:51,388 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-31 11:55:51,390 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-31 11:55:51,390 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-31 11:55:51,391 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-31 11:55:51,392 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-31 11:55:51,395 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-31 11:55:51,397 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-31 11:55:51,398 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-31 11:55:51,398 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-31 11:55:51,399 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-31 11:55:51,400 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-31 11:55:51,400 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-31 11:55:51,402 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-31 11:55:51,403 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-31 11:55:51,403 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-31 11:55:51,404 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-31 11:55:51,405 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-31 11:55:51,405 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-31 11:55:51,405 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-31 11:55:51,406 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-31 11:55:51,406 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-31 11:55:51,411 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-31 11:55:51,411 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DataRace-32bit-Automizer_Default.epf [2023-08-31 11:55:51,430 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-31 11:55:51,431 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-31 11:55:51,431 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-31 11:55:51,431 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-31 11:55:51,432 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-31 11:55:51,432 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-31 11:55:51,433 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-31 11:55:51,433 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-31 11:55:51,433 INFO L138 SettingsManager]: * Use SBE=true [2023-08-31 11:55:51,433 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-31 11:55:51,434 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-31 11:55:51,434 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-31 11:55:51,434 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-31 11:55:51,434 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-31 11:55:51,434 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-31 11:55:51,434 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-31 11:55:51,434 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-31 11:55:51,435 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-31 11:55:51,435 INFO L138 SettingsManager]: * Check absence of data races in concurrent programs=true [2023-08-31 11:55:51,435 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-31 11:55:51,435 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-31 11:55:51,435 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-31 11:55:51,435 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-31 11:55:51,436 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-31 11:55:51,436 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-31 11:55:51,436 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-31 11:55:51,436 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 11:55:51,436 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-31 11:55:51,436 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-31 11:55:51,436 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-31 11:55:51,436 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-31 11:55:51,437 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-31 11:55:51,437 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-31 11:55:51,437 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-31 11:55:51,437 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-31 11:55:51,437 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-31 11:55:51,437 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-31 11:55:51,437 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! data-race) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5eef73b6b2655059556d731e3a5babc181132142f2417a2cf863165dd8efda84 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-08-31 11:55:51,673 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-31 11:55:51,688 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-31 11:55:51,689 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-31 11:55:51,690 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-31 11:55:51,690 INFO L275 PluginConnector]: CDTParser initialized [2023-08-31 11:55:51,691 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/40_barrier_vf.i [2023-08-31 11:55:52,716 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-31 11:55:52,938 INFO L351 CDTParser]: Found 1 translation units. [2023-08-31 11:55:52,939 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/40_barrier_vf.i [2023-08-31 11:55:52,971 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/82f5ed3ac/9b9528c300834ea6a205ebc14ac12507/FLAG2e1b43aaa [2023-08-31 11:55:52,984 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/82f5ed3ac/9b9528c300834ea6a205ebc14ac12507 [2023-08-31 11:55:52,985 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-31 11:55:52,986 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-31 11:55:52,989 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-31 11:55:52,989 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-31 11:55:52,991 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-31 11:55:52,991 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 11:55:52" (1/1) ... [2023-08-31 11:55:52,993 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@41f7d34f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 11:55:52, skipping insertion in model container [2023-08-31 11:55:52,994 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 11:55:52" (1/1) ... [2023-08-31 11:55:52,997 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-31 11:55:53,031 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-31 11:55:53,160 WARN L633 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-08-31 11:55:53,278 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/40_barrier_vf.i[31163,31176] [2023-08-31 11:55:53,284 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 11:55:53,290 INFO L203 MainTranslator]: Completed pre-run [2023-08-31 11:55:53,300 WARN L633 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-08-31 11:55:53,312 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/40_barrier_vf.i[31163,31176] [2023-08-31 11:55:53,314 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 11:55:53,341 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-31 11:55:53,342 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-31 11:55:53,342 WARN L667 CHandler]: The function __builtin_bswap16 is called, but not defined or handled by StandardFunctionHandler. [2023-08-31 11:55:53,346 INFO L208 MainTranslator]: Completed translation [2023-08-31 11:55:53,347 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 11:55:53 WrapperNode [2023-08-31 11:55:53,347 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-31 11:55:53,348 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-31 11:55:53,348 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-31 11:55:53,348 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-31 11:55:53,352 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 11:55:53" (1/1) ... [2023-08-31 11:55:53,361 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 11:55:53" (1/1) ... [2023-08-31 11:55:53,380 INFO L138 Inliner]: procedures = 174, calls = 25, calls flagged for inlining = 10, calls inlined = 12, statements flattened = 124 [2023-08-31 11:55:53,381 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-31 11:55:53,381 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-31 11:55:53,382 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-31 11:55:53,382 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-31 11:55:53,387 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 11:55:53" (1/1) ... [2023-08-31 11:55:53,387 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 11:55:53" (1/1) ... [2023-08-31 11:55:53,389 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 11:55:53" (1/1) ... [2023-08-31 11:55:53,390 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 11:55:53" (1/1) ... [2023-08-31 11:55:53,392 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 11:55:53" (1/1) ... [2023-08-31 11:55:53,403 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 11:55:53" (1/1) ... [2023-08-31 11:55:53,404 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 11:55:53" (1/1) ... [2023-08-31 11:55:53,405 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 11:55:53" (1/1) ... [2023-08-31 11:55:53,406 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-31 11:55:53,407 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-31 11:55:53,407 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-31 11:55:53,407 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-31 11:55:53,408 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 11:55:53" (1/1) ... [2023-08-31 11:55:53,411 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 11:55:53,419 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 11:55:53,435 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 11:55:53,455 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 11:55:53,473 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-08-31 11:55:53,473 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-08-31 11:55:53,473 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-31 11:55:53,473 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-31 11:55:53,474 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-31 11:55:53,474 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-31 11:55:53,474 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-31 11:55:53,474 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-31 11:55:53,474 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-31 11:55:53,474 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-31 11:55:53,474 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-31 11:55:53,475 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 11:55:53,560 INFO L236 CfgBuilder]: Building ICFG [2023-08-31 11:55:53,562 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-31 11:55:53,732 INFO L277 CfgBuilder]: Performing block encoding [2023-08-31 11:55:53,868 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-31 11:55:53,875 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-08-31 11:55:53,877 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 11:55:53 BoogieIcfgContainer [2023-08-31 11:55:53,877 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-31 11:55:53,879 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-31 11:55:53,879 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-31 11:55:53,881 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-31 11:55:53,881 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.08 11:55:52" (1/3) ... [2023-08-31 11:55:53,881 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70687a87 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 11:55:53, skipping insertion in model container [2023-08-31 11:55:53,881 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 11:55:53" (2/3) ... [2023-08-31 11:55:53,882 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70687a87 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 11:55:53, skipping insertion in model container [2023-08-31 11:55:53,882 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 11:55:53" (3/3) ... [2023-08-31 11:55:53,883 INFO L112 eAbstractionObserver]: Analyzing ICFG 40_barrier_vf.i [2023-08-31 11:55:53,888 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-31 11:55:53,893 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-31 11:55:53,893 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 15 error locations. [2023-08-31 11:55:53,893 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-31 11:55:53,932 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 11:55:53,965 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 75 places, 75 transitions, 155 flow [2023-08-31 11:55:54,001 INFO L130 PetriNetUnfolder]: 4/85 cut-off events. [2023-08-31 11:55:54,003 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-31 11:55:54,006 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90 conditions, 85 events. 4/85 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 111 event pairs, 0 based on Foata normal form. 0/64 useless extension candidates. Maximal degree in co-relation 60. Up to 4 conditions per place. [2023-08-31 11:55:54,006 INFO L82 GeneralOperation]: Start removeDead. Operand has 75 places, 75 transitions, 155 flow [2023-08-31 11:55:54,008 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 75 places, 75 transitions, 155 flow [2023-08-31 11:55:54,012 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 11:55:54,026 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 75 places, 75 transitions, 155 flow [2023-08-31 11:55:54,028 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 75 places, 75 transitions, 155 flow [2023-08-31 11:55:54,028 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 75 places, 75 transitions, 155 flow [2023-08-31 11:55:54,049 INFO L130 PetriNetUnfolder]: 4/85 cut-off events. [2023-08-31 11:55:54,050 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-31 11:55:54,051 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90 conditions, 85 events. 4/85 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 111 event pairs, 0 based on Foata normal form. 0/64 useless extension candidates. Maximal degree in co-relation 60. Up to 4 conditions per place. [2023-08-31 11:55:54,052 INFO L119 LiptonReduction]: Number of co-enabled transitions 1248 [2023-08-31 11:55:55,889 INFO L134 LiptonReduction]: Checked pairs total: 1392 [2023-08-31 11:55:55,889 INFO L136 LiptonReduction]: Total number of compositions: 99 [2023-08-31 11:55:55,901 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 11:55:55,917 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;@3651a7b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 11:55:55,917 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 11:55:55,920 INFO L130 PetriNetUnfolder]: 0/23 cut-off events. [2023-08-31 11:55:55,920 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-31 11:55:55,921 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 11:55:55,921 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-31 11:55:55,921 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 11:55:55,924 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 11:55:55,924 INFO L85 PathProgramCache]: Analyzing trace with hash 2042225949, now seen corresponding path program 1 times [2023-08-31 11:55:55,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 11:55:55,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160938562] [2023-08-31 11:55:55,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 11:55:55,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 11:55:55,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:55:55,999 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 11:55:56,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:55:56,017 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 11:55:56,018 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 11:55:56,019 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 11:55:56,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-31 11:55:56,021 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 11:55:56,022 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 11:55:56,023 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 11:55:56,023 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-31 11:55:56,038 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 11:55:56,040 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 124 places, 124 transitions, 260 flow [2023-08-31 11:55:56,056 INFO L130 PetriNetUnfolder]: 7/146 cut-off events. [2023-08-31 11:55:56,056 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-31 11:55:56,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 156 conditions, 146 events. 7/146 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 347 event pairs, 0 based on Foata normal form. 0/106 useless extension candidates. Maximal degree in co-relation 108. Up to 6 conditions per place. [2023-08-31 11:55:56,057 INFO L82 GeneralOperation]: Start removeDead. Operand has 124 places, 124 transitions, 260 flow [2023-08-31 11:55:56,058 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 124 places, 124 transitions, 260 flow [2023-08-31 11:55:56,058 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 11:55:56,058 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 124 places, 124 transitions, 260 flow [2023-08-31 11:55:56,058 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 124 places, 124 transitions, 260 flow [2023-08-31 11:55:56,059 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 124 places, 124 transitions, 260 flow [2023-08-31 11:55:56,072 INFO L130 PetriNetUnfolder]: 7/146 cut-off events. [2023-08-31 11:55:56,073 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-31 11:55:56,074 INFO L83 FinitePrefix]: Finished finitePrefix Result has 156 conditions, 146 events. 7/146 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 347 event pairs, 0 based on Foata normal form. 0/106 useless extension candidates. Maximal degree in co-relation 108. Up to 6 conditions per place. [2023-08-31 11:55:56,076 INFO L119 LiptonReduction]: Number of co-enabled transitions 7200 [2023-08-31 11:55:56,887 INFO L134 LiptonReduction]: Checked pairs total: 30209 [2023-08-31 11:55:56,887 INFO L136 LiptonReduction]: Total number of compositions: 68 [2023-08-31 11:55:56,889 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 11:55:56,889 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;@3651a7b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 11:55:56,889 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 11:55:56,892 INFO L130 PetriNetUnfolder]: 0/30 cut-off events. [2023-08-31 11:55:56,892 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-31 11:55:56,892 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 11:55:56,892 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-31 11:55:56,893 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 11:55:56,893 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 11:55:56,893 INFO L85 PathProgramCache]: Analyzing trace with hash -1108002069, now seen corresponding path program 1 times [2023-08-31 11:55:56,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 11:55:56,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659009420] [2023-08-31 11:55:56,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 11:55:56,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 11:55:56,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:55:56,907 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 11:55:56,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:55:56,919 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 11:55:56,919 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 11:55:56,920 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 11:55:56,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-31 11:55:56,920 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 11:55:56,920 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 11:55:56,921 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 11:55:56,921 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-31 11:55:56,938 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 11:55:56,940 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 173 places, 173 transitions, 367 flow [2023-08-31 11:55:56,968 INFO L130 PetriNetUnfolder]: 10/207 cut-off events. [2023-08-31 11:55:56,968 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-31 11:55:56,970 INFO L83 FinitePrefix]: Finished finitePrefix Result has 223 conditions, 207 events. 10/207 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 642 event pairs, 0 based on Foata normal form. 0/148 useless extension candidates. Maximal degree in co-relation 156. Up to 8 conditions per place. [2023-08-31 11:55:56,970 INFO L82 GeneralOperation]: Start removeDead. Operand has 173 places, 173 transitions, 367 flow [2023-08-31 11:55:56,971 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 173 places, 173 transitions, 367 flow [2023-08-31 11:55:56,971 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 11:55:56,971 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 173 places, 173 transitions, 367 flow [2023-08-31 11:55:56,972 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 173 places, 173 transitions, 367 flow [2023-08-31 11:55:56,972 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 173 places, 173 transitions, 367 flow [2023-08-31 11:55:56,991 INFO L130 PetriNetUnfolder]: 10/207 cut-off events. [2023-08-31 11:55:56,992 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-31 11:55:56,993 INFO L83 FinitePrefix]: Finished finitePrefix Result has 223 conditions, 207 events. 10/207 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 642 event pairs, 0 based on Foata normal form. 0/148 useless extension candidates. Maximal degree in co-relation 156. Up to 8 conditions per place. [2023-08-31 11:55:57,000 INFO L119 LiptonReduction]: Number of co-enabled transitions 17856 [2023-08-31 11:55:57,908 INFO L134 LiptonReduction]: Checked pairs total: 94851 [2023-08-31 11:55:57,908 INFO L136 LiptonReduction]: Total number of compositions: 93 [2023-08-31 11:55:57,910 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 11:55:57,911 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;@3651a7b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 11:55:57,911 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 11:55:57,914 INFO L130 PetriNetUnfolder]: 0/56 cut-off events. [2023-08-31 11:55:57,915 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-31 11:55:57,915 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 11:55:57,915 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-08-31 11:55:57,915 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 11:55:57,915 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 11:55:57,915 INFO L85 PathProgramCache]: Analyzing trace with hash -178468734, now seen corresponding path program 1 times [2023-08-31 11:55:57,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 11:55:57,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533750804] [2023-08-31 11:55:57,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 11:55:57,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 11:55:57,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:55:57,933 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 11:55:57,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:55:57,945 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 11:55:57,945 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 11:55:57,945 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 11:55:57,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-31 11:55:57,945 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 11:55:57,946 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 11:55:57,946 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 11:55:57,946 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-08-31 11:55:57,966 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 11:55:57,968 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 222 places, 222 transitions, 476 flow [2023-08-31 11:55:57,989 INFO L130 PetriNetUnfolder]: 13/268 cut-off events. [2023-08-31 11:55:57,989 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-08-31 11:55:57,991 INFO L83 FinitePrefix]: Finished finitePrefix Result has 291 conditions, 268 events. 13/268 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 950 event pairs, 0 based on Foata normal form. 0/190 useless extension candidates. Maximal degree in co-relation 215. Up to 10 conditions per place. [2023-08-31 11:55:57,991 INFO L82 GeneralOperation]: Start removeDead. Operand has 222 places, 222 transitions, 476 flow [2023-08-31 11:55:57,992 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 222 places, 222 transitions, 476 flow [2023-08-31 11:55:57,992 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 11:55:57,992 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 222 places, 222 transitions, 476 flow [2023-08-31 11:55:57,993 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 222 places, 222 transitions, 476 flow [2023-08-31 11:55:57,993 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 222 places, 222 transitions, 476 flow [2023-08-31 11:55:58,022 INFO L130 PetriNetUnfolder]: 13/268 cut-off events. [2023-08-31 11:55:58,022 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-08-31 11:55:58,024 INFO L83 FinitePrefix]: Finished finitePrefix Result has 291 conditions, 268 events. 13/268 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 950 event pairs, 0 based on Foata normal form. 0/190 useless extension candidates. Maximal degree in co-relation 215. Up to 10 conditions per place. [2023-08-31 11:55:58,033 INFO L119 LiptonReduction]: Number of co-enabled transitions 33216 [2023-08-31 11:55:59,046 INFO L134 LiptonReduction]: Checked pairs total: 183493 [2023-08-31 11:55:59,046 INFO L136 LiptonReduction]: Total number of compositions: 115 [2023-08-31 11:55:59,047 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 11:55:59,047 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;@3651a7b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 11:55:59,048 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 11:55:59,053 INFO L130 PetriNetUnfolder]: 1/96 cut-off events. [2023-08-31 11:55:59,053 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-08-31 11:55:59,053 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 11:55:59,054 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2023-08-31 11:55:59,054 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 11:55:59,054 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 11:55:59,054 INFO L85 PathProgramCache]: Analyzing trace with hash -1071770339, now seen corresponding path program 1 times [2023-08-31 11:55:59,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 11:55:59,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076392881] [2023-08-31 11:55:59,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 11:55:59,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 11:55:59,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:55:59,076 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 11:55:59,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:55:59,094 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 11:55:59,096 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 11:55:59,097 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 11:55:59,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-31 11:55:59,097 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 11:55:59,097 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 11:55:59,098 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 11:55:59,098 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-08-31 11:55:59,120 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 11:55:59,122 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 271 places, 271 transitions, 587 flow [2023-08-31 11:55:59,161 INFO L130 PetriNetUnfolder]: 16/329 cut-off events. [2023-08-31 11:55:59,161 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-08-31 11:55:59,163 INFO L83 FinitePrefix]: Finished finitePrefix Result has 360 conditions, 329 events. 16/329 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1231 event pairs, 0 based on Foata normal form. 0/232 useless extension candidates. Maximal degree in co-relation 281. Up to 12 conditions per place. [2023-08-31 11:55:59,163 INFO L82 GeneralOperation]: Start removeDead. Operand has 271 places, 271 transitions, 587 flow [2023-08-31 11:55:59,165 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 271 places, 271 transitions, 587 flow [2023-08-31 11:55:59,165 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 11:55:59,165 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 271 places, 271 transitions, 587 flow [2023-08-31 11:55:59,166 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 271 places, 271 transitions, 587 flow [2023-08-31 11:55:59,166 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 271 places, 271 transitions, 587 flow [2023-08-31 11:55:59,206 INFO L130 PetriNetUnfolder]: 16/329 cut-off events. [2023-08-31 11:55:59,206 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-08-31 11:55:59,208 INFO L83 FinitePrefix]: Finished finitePrefix Result has 360 conditions, 329 events. 16/329 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1231 event pairs, 0 based on Foata normal form. 0/232 useless extension candidates. Maximal degree in co-relation 281. Up to 12 conditions per place. [2023-08-31 11:55:59,215 INFO L119 LiptonReduction]: Number of co-enabled transitions 53280 [2023-08-31 11:56:00,391 INFO L134 LiptonReduction]: Checked pairs total: 301319 [2023-08-31 11:56:00,391 INFO L136 LiptonReduction]: Total number of compositions: 139 [2023-08-31 11:56:00,393 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 11:56:00,393 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;@3651a7b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 11:56:00,393 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 11:56:00,404 INFO L130 PetriNetUnfolder]: 2/136 cut-off events. [2023-08-31 11:56:00,404 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-08-31 11:56:00,404 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 11:56:00,404 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 11:56:00,405 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 11:56:00,405 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 11:56:00,405 INFO L85 PathProgramCache]: Analyzing trace with hash -1472891872, now seen corresponding path program 1 times [2023-08-31 11:56:00,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 11:56:00,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563664429] [2023-08-31 11:56:00,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 11:56:00,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 11:56:00,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:56:00,424 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 11:56:00,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:56:00,436 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 11:56:00,436 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 11:56:00,436 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 11:56:00,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-31 11:56:00,436 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 11:56:00,437 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 11:56:00,437 WARN L233 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 11:56:00,437 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2023-08-31 11:56:00,461 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 11:56:00,463 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 320 places, 320 transitions, 700 flow [2023-08-31 11:56:00,512 INFO L130 PetriNetUnfolder]: 19/390 cut-off events. [2023-08-31 11:56:00,513 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2023-08-31 11:56:00,515 INFO L83 FinitePrefix]: Finished finitePrefix Result has 430 conditions, 390 events. 19/390 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1549 event pairs, 0 based on Foata normal form. 0/274 useless extension candidates. Maximal degree in co-relation 349. Up to 14 conditions per place. [2023-08-31 11:56:00,515 INFO L82 GeneralOperation]: Start removeDead. Operand has 320 places, 320 transitions, 700 flow [2023-08-31 11:56:00,517 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 320 places, 320 transitions, 700 flow [2023-08-31 11:56:00,517 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 11:56:00,517 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 320 places, 320 transitions, 700 flow [2023-08-31 11:56:00,518 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 320 places, 320 transitions, 700 flow [2023-08-31 11:56:00,518 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 320 places, 320 transitions, 700 flow [2023-08-31 11:56:00,552 INFO L130 PetriNetUnfolder]: 19/390 cut-off events. [2023-08-31 11:56:00,552 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2023-08-31 11:56:00,555 INFO L83 FinitePrefix]: Finished finitePrefix Result has 430 conditions, 390 events. 19/390 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1549 event pairs, 0 based on Foata normal form. 0/274 useless extension candidates. Maximal degree in co-relation 349. Up to 14 conditions per place. [2023-08-31 11:56:00,566 INFO L119 LiptonReduction]: Number of co-enabled transitions 78048 [2023-08-31 11:56:01,965 INFO L134 LiptonReduction]: Checked pairs total: 380109 [2023-08-31 11:56:01,965 INFO L136 LiptonReduction]: Total number of compositions: 160 [2023-08-31 11:56:01,967 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 11:56:01,967 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;@3651a7b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 11:56:01,967 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 11:56:01,978 INFO L130 PetriNetUnfolder]: 3/176 cut-off events. [2023-08-31 11:56:01,979 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2023-08-31 11:56:01,979 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 11:56:01,979 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 11:56:01,979 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 11:56:01,979 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 11:56:01,979 INFO L85 PathProgramCache]: Analyzing trace with hash -908263952, now seen corresponding path program 1 times [2023-08-31 11:56:01,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 11:56:01,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154494485] [2023-08-31 11:56:01,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 11:56:01,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 11:56:02,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:56:02,010 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 11:56:02,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:56:02,021 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 11:56:02,021 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 11:56:02,021 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 11:56:02,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-31 11:56:02,021 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 11:56:02,022 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 11:56:02,022 WARN L233 ceAbstractionStarter]: 6 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 11:56:02,022 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 7 thread instances. [2023-08-31 11:56:02,051 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 11:56:02,054 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 369 places, 369 transitions, 815 flow [2023-08-31 11:56:02,121 INFO L130 PetriNetUnfolder]: 22/451 cut-off events. [2023-08-31 11:56:02,121 INFO L131 PetriNetUnfolder]: For 77/77 co-relation queries the response was YES. [2023-08-31 11:56:02,125 INFO L83 FinitePrefix]: Finished finitePrefix Result has 501 conditions, 451 events. 22/451 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1849 event pairs, 0 based on Foata normal form. 0/316 useless extension candidates. Maximal degree in co-relation 419. Up to 16 conditions per place. [2023-08-31 11:56:02,125 INFO L82 GeneralOperation]: Start removeDead. Operand has 369 places, 369 transitions, 815 flow [2023-08-31 11:56:02,127 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 369 places, 369 transitions, 815 flow [2023-08-31 11:56:02,127 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 11:56:02,127 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 369 places, 369 transitions, 815 flow [2023-08-31 11:56:02,127 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 369 places, 369 transitions, 815 flow [2023-08-31 11:56:02,128 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 369 places, 369 transitions, 815 flow [2023-08-31 11:56:02,186 INFO L130 PetriNetUnfolder]: 22/451 cut-off events. [2023-08-31 11:56:02,187 INFO L131 PetriNetUnfolder]: For 77/77 co-relation queries the response was YES. [2023-08-31 11:56:02,190 INFO L83 FinitePrefix]: Finished finitePrefix Result has 501 conditions, 451 events. 22/451 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1849 event pairs, 0 based on Foata normal form. 0/316 useless extension candidates. Maximal degree in co-relation 419. Up to 16 conditions per place. [2023-08-31 11:56:02,204 INFO L119 LiptonReduction]: Number of co-enabled transitions 107520 [2023-08-31 11:56:03,665 INFO L134 LiptonReduction]: Checked pairs total: 614917 [2023-08-31 11:56:03,665 INFO L136 LiptonReduction]: Total number of compositions: 187 [2023-08-31 11:56:03,667 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 11:56:03,668 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;@3651a7b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 11:56:03,668 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 11:56:03,693 INFO L130 PetriNetUnfolder]: 4/216 cut-off events. [2023-08-31 11:56:03,693 INFO L131 PetriNetUnfolder]: For 77/77 co-relation queries the response was YES. [2023-08-31 11:56:03,693 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 11:56:03,693 INFO L208 CegarLoopForPetriNet]: trace histogram [8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 11:56:03,694 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 11:56:03,694 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 11:56:03,694 INFO L85 PathProgramCache]: Analyzing trace with hash -1365178245, now seen corresponding path program 1 times [2023-08-31 11:56:03,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 11:56:03,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093738297] [2023-08-31 11:56:03,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 11:56:03,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 11:56:03,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:56:03,717 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 11:56:03,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:56:03,729 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 11:56:03,729 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 11:56:03,729 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 11:56:03,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-31 11:56:03,729 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 11:56:03,730 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 11:56:03,730 WARN L233 ceAbstractionStarter]: 7 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 11:56:03,730 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 8 thread instances. [2023-08-31 11:56:03,759 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 11:56:03,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 418 places, 418 transitions, 932 flow [2023-08-31 11:56:03,826 INFO L130 PetriNetUnfolder]: 25/512 cut-off events. [2023-08-31 11:56:03,826 INFO L131 PetriNetUnfolder]: For 112/112 co-relation queries the response was YES. [2023-08-31 11:56:03,830 INFO L83 FinitePrefix]: Finished finitePrefix Result has 573 conditions, 512 events. 25/512 cut-off events. For 112/112 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 2145 event pairs, 0 based on Foata normal form. 0/358 useless extension candidates. Maximal degree in co-relation 490. Up to 18 conditions per place. [2023-08-31 11:56:03,830 INFO L82 GeneralOperation]: Start removeDead. Operand has 418 places, 418 transitions, 932 flow [2023-08-31 11:56:03,832 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 418 places, 418 transitions, 932 flow [2023-08-31 11:56:03,832 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 11:56:03,833 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 418 places, 418 transitions, 932 flow [2023-08-31 11:56:03,833 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 418 places, 418 transitions, 932 flow [2023-08-31 11:56:03,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 418 places, 418 transitions, 932 flow [2023-08-31 11:56:03,924 INFO L130 PetriNetUnfolder]: 25/512 cut-off events. [2023-08-31 11:56:03,925 INFO L131 PetriNetUnfolder]: For 112/112 co-relation queries the response was YES. [2023-08-31 11:56:03,928 INFO L83 FinitePrefix]: Finished finitePrefix Result has 573 conditions, 512 events. 25/512 cut-off events. For 112/112 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 2145 event pairs, 0 based on Foata normal form. 0/358 useless extension candidates. Maximal degree in co-relation 490. Up to 18 conditions per place. [2023-08-31 11:56:03,946 INFO L119 LiptonReduction]: Number of co-enabled transitions 141696 [2023-08-31 11:56:05,633 INFO L134 LiptonReduction]: Checked pairs total: 825389 [2023-08-31 11:56:05,634 INFO L136 LiptonReduction]: Total number of compositions: 207 [2023-08-31 11:56:05,637 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 11:56:05,638 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;@3651a7b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 11:56:05,638 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 11:56:05,658 INFO L130 PetriNetUnfolder]: 5/256 cut-off events. [2023-08-31 11:56:05,659 INFO L131 PetriNetUnfolder]: For 112/112 co-relation queries the response was YES. [2023-08-31 11:56:05,659 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 11:56:05,659 INFO L208 CegarLoopForPetriNet]: trace histogram [9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 11:56:05,660 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 11:56:05,660 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 11:56:05,660 INFO L85 PathProgramCache]: Analyzing trace with hash 1754364483, now seen corresponding path program 1 times [2023-08-31 11:56:05,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 11:56:05,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832799468] [2023-08-31 11:56:05,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 11:56:05,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 11:56:05,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:56:05,685 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 11:56:05,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:56:05,709 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 11:56:05,710 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 11:56:05,712 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 11:56:05,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-31 11:56:05,712 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 11:56:05,713 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 11:56:05,717 WARN L233 ceAbstractionStarter]: 8 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 11:56:05,717 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 9 thread instances. [2023-08-31 11:56:05,765 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 11:56:05,768 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 467 places, 467 transitions, 1051 flow [2023-08-31 11:56:05,840 INFO L130 PetriNetUnfolder]: 28/573 cut-off events. [2023-08-31 11:56:05,840 INFO L131 PetriNetUnfolder]: For 156/156 co-relation queries the response was YES. [2023-08-31 11:56:05,847 INFO L83 FinitePrefix]: Finished finitePrefix Result has 646 conditions, 573 events. 28/573 cut-off events. For 156/156 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 2464 event pairs, 0 based on Foata normal form. 0/400 useless extension candidates. Maximal degree in co-relation 562. Up to 20 conditions per place. [2023-08-31 11:56:05,847 INFO L82 GeneralOperation]: Start removeDead. Operand has 467 places, 467 transitions, 1051 flow [2023-08-31 11:56:05,850 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 467 places, 467 transitions, 1051 flow [2023-08-31 11:56:05,850 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 11:56:05,850 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 467 places, 467 transitions, 1051 flow [2023-08-31 11:56:05,851 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 467 places, 467 transitions, 1051 flow [2023-08-31 11:56:05,851 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 467 places, 467 transitions, 1051 flow [2023-08-31 11:56:05,921 INFO L130 PetriNetUnfolder]: 28/573 cut-off events. [2023-08-31 11:56:05,921 INFO L131 PetriNetUnfolder]: For 156/156 co-relation queries the response was YES. [2023-08-31 11:56:05,927 INFO L83 FinitePrefix]: Finished finitePrefix Result has 646 conditions, 573 events. 28/573 cut-off events. For 156/156 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 2464 event pairs, 0 based on Foata normal form. 0/400 useless extension candidates. Maximal degree in co-relation 562. Up to 20 conditions per place. [2023-08-31 11:56:05,972 INFO L119 LiptonReduction]: Number of co-enabled transitions 180576 [2023-08-31 11:56:07,863 INFO L134 LiptonReduction]: Checked pairs total: 1049648 [2023-08-31 11:56:07,863 INFO L136 LiptonReduction]: Total number of compositions: 231 [2023-08-31 11:56:07,864 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 11:56:07,865 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;@3651a7b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 11:56:07,865 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 11:56:07,905 INFO L130 PetriNetUnfolder]: 6/296 cut-off events. [2023-08-31 11:56:07,914 INFO L131 PetriNetUnfolder]: For 156/156 co-relation queries the response was YES. [2023-08-31 11:56:07,914 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 11:56:07,914 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 11:56:07,914 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 11:56:07,915 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 11:56:07,915 INFO L85 PathProgramCache]: Analyzing trace with hash 1458978115, now seen corresponding path program 1 times [2023-08-31 11:56:07,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 11:56:07,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953019151] [2023-08-31 11:56:07,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 11:56:07,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 11:56:07,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:56:07,936 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 11:56:07,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:56:07,957 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 11:56:07,957 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 11:56:07,957 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 11:56:07,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-31 11:56:07,958 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 11:56:07,960 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 11:56:07,960 WARN L233 ceAbstractionStarter]: 9 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 11:56:07,960 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 10 thread instances. [2023-08-31 11:56:07,996 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 11:56:07,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 516 places, 516 transitions, 1172 flow [2023-08-31 11:56:08,114 INFO L130 PetriNetUnfolder]: 31/634 cut-off events. [2023-08-31 11:56:08,114 INFO L131 PetriNetUnfolder]: For 210/210 co-relation queries the response was YES. [2023-08-31 11:56:08,121 INFO L83 FinitePrefix]: Finished finitePrefix Result has 720 conditions, 634 events. 31/634 cut-off events. For 210/210 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 2755 event pairs, 0 based on Foata normal form. 0/442 useless extension candidates. Maximal degree in co-relation 635. Up to 22 conditions per place. [2023-08-31 11:56:08,121 INFO L82 GeneralOperation]: Start removeDead. Operand has 516 places, 516 transitions, 1172 flow [2023-08-31 11:56:08,125 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 516 places, 516 transitions, 1172 flow [2023-08-31 11:56:08,125 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 11:56:08,125 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 516 places, 516 transitions, 1172 flow [2023-08-31 11:56:08,128 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 516 places, 516 transitions, 1172 flow [2023-08-31 11:56:08,128 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 516 places, 516 transitions, 1172 flow [2023-08-31 11:56:08,218 INFO L130 PetriNetUnfolder]: 31/634 cut-off events. [2023-08-31 11:56:08,218 INFO L131 PetriNetUnfolder]: For 210/210 co-relation queries the response was YES. [2023-08-31 11:56:08,225 INFO L83 FinitePrefix]: Finished finitePrefix Result has 720 conditions, 634 events. 31/634 cut-off events. For 210/210 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 2755 event pairs, 0 based on Foata normal form. 0/442 useless extension candidates. Maximal degree in co-relation 635. Up to 22 conditions per place. [2023-08-31 11:56:08,255 INFO L119 LiptonReduction]: Number of co-enabled transitions 224160 [2023-08-31 11:56:10,133 INFO L134 LiptonReduction]: Checked pairs total: 1315583 [2023-08-31 11:56:10,133 INFO L136 LiptonReduction]: Total number of compositions: 252 [2023-08-31 11:56:10,135 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 11:56:10,135 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;@3651a7b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 11:56:10,135 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 11:56:10,165 INFO L130 PetriNetUnfolder]: 7/336 cut-off events. [2023-08-31 11:56:10,166 INFO L131 PetriNetUnfolder]: For 210/210 co-relation queries the response was YES. [2023-08-31 11:56:10,166 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 11:56:10,166 INFO L208 CegarLoopForPetriNet]: trace histogram [11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 11:56:10,166 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 11:56:10,166 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 11:56:10,166 INFO L85 PathProgramCache]: Analyzing trace with hash 955021718, now seen corresponding path program 1 times [2023-08-31 11:56:10,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 11:56:10,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547644738] [2023-08-31 11:56:10,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 11:56:10,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 11:56:10,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:56:10,186 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 11:56:10,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:56:10,212 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 11:56:10,213 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 11:56:10,213 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 11:56:10,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-31 11:56:10,214 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 11:56:10,214 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 11:56:10,214 WARN L233 ceAbstractionStarter]: 10 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 11:56:10,214 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 11 thread instances. [2023-08-31 11:56:10,253 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 11:56:10,255 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 565 places, 565 transitions, 1295 flow [2023-08-31 11:56:10,357 INFO L130 PetriNetUnfolder]: 34/695 cut-off events. [2023-08-31 11:56:10,357 INFO L131 PetriNetUnfolder]: For 275/275 co-relation queries the response was YES. [2023-08-31 11:56:10,367 INFO L83 FinitePrefix]: Finished finitePrefix Result has 795 conditions, 695 events. 34/695 cut-off events. For 275/275 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 3060 event pairs, 0 based on Foata normal form. 0/484 useless extension candidates. Maximal degree in co-relation 709. Up to 24 conditions per place. [2023-08-31 11:56:10,368 INFO L82 GeneralOperation]: Start removeDead. Operand has 565 places, 565 transitions, 1295 flow [2023-08-31 11:56:10,372 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 565 places, 565 transitions, 1295 flow [2023-08-31 11:56:10,372 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 11:56:10,372 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 565 places, 565 transitions, 1295 flow [2023-08-31 11:56:10,372 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 565 places, 565 transitions, 1295 flow [2023-08-31 11:56:10,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 565 places, 565 transitions, 1295 flow [2023-08-31 11:56:10,483 INFO L130 PetriNetUnfolder]: 34/695 cut-off events. [2023-08-31 11:56:10,483 INFO L131 PetriNetUnfolder]: For 275/275 co-relation queries the response was YES. [2023-08-31 11:56:10,492 INFO L83 FinitePrefix]: Finished finitePrefix Result has 795 conditions, 695 events. 34/695 cut-off events. For 275/275 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 3060 event pairs, 0 based on Foata normal form. 0/484 useless extension candidates. Maximal degree in co-relation 709. Up to 24 conditions per place. [2023-08-31 11:56:10,527 INFO L119 LiptonReduction]: Number of co-enabled transitions 272448 [2023-08-31 11:56:12,828 INFO L134 LiptonReduction]: Checked pairs total: 1601078 [2023-08-31 11:56:12,828 INFO L136 LiptonReduction]: Total number of compositions: 282 [2023-08-31 11:56:12,829 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 11:56:12,829 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;@3651a7b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 11:56:12,829 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 11:56:12,883 INFO L130 PetriNetUnfolder]: 8/376 cut-off events. [2023-08-31 11:56:12,883 INFO L131 PetriNetUnfolder]: For 275/275 co-relation queries the response was YES. [2023-08-31 11:56:12,884 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 11:56:12,884 INFO L208 CegarLoopForPetriNet]: trace histogram [12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 11:56:12,884 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 11:56:12,884 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 11:56:12,884 INFO L85 PathProgramCache]: Analyzing trace with hash 1523725415, now seen corresponding path program 1 times [2023-08-31 11:56:12,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 11:56:12,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47320075] [2023-08-31 11:56:12,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 11:56:12,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 11:56:12,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:56:12,899 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 11:56:12,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:56:12,914 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 11:56:12,914 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 11:56:12,915 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 11:56:12,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-31 11:56:12,916 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 11:56:12,917 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 11:56:12,917 WARN L233 ceAbstractionStarter]: 11 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 11:56:12,917 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 12 thread instances. [2023-08-31 11:56:12,957 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 11:56:12,960 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 614 places, 614 transitions, 1420 flow [2023-08-31 11:56:13,078 INFO L130 PetriNetUnfolder]: 37/756 cut-off events. [2023-08-31 11:56:13,079 INFO L131 PetriNetUnfolder]: For 352/352 co-relation queries the response was YES. [2023-08-31 11:56:13,089 INFO L83 FinitePrefix]: Finished finitePrefix Result has 871 conditions, 756 events. 37/756 cut-off events. For 352/352 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 3342 event pairs, 0 based on Foata normal form. 0/526 useless extension candidates. Maximal degree in co-relation 784. Up to 26 conditions per place. [2023-08-31 11:56:13,090 INFO L82 GeneralOperation]: Start removeDead. Operand has 614 places, 614 transitions, 1420 flow [2023-08-31 11:56:13,095 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 614 places, 614 transitions, 1420 flow [2023-08-31 11:56:13,095 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 11:56:13,095 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 614 places, 614 transitions, 1420 flow [2023-08-31 11:56:13,095 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 614 places, 614 transitions, 1420 flow [2023-08-31 11:56:13,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 614 places, 614 transitions, 1420 flow [2023-08-31 11:56:13,262 INFO L130 PetriNetUnfolder]: 37/756 cut-off events. [2023-08-31 11:56:13,262 INFO L131 PetriNetUnfolder]: For 352/352 co-relation queries the response was YES. [2023-08-31 11:56:13,281 INFO L83 FinitePrefix]: Finished finitePrefix Result has 871 conditions, 756 events. 37/756 cut-off events. For 352/352 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 3342 event pairs, 0 based on Foata normal form. 0/526 useless extension candidates. Maximal degree in co-relation 784. Up to 26 conditions per place. [2023-08-31 11:56:13,320 INFO L119 LiptonReduction]: Number of co-enabled transitions 325440 [2023-08-31 11:56:15,374 INFO L134 LiptonReduction]: Checked pairs total: 1900114 [2023-08-31 11:56:15,374 INFO L136 LiptonReduction]: Total number of compositions: 306 [2023-08-31 11:56:15,375 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 11:56:15,375 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;@3651a7b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 11:56:15,375 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 11:56:15,421 INFO L130 PetriNetUnfolder]: 9/416 cut-off events. [2023-08-31 11:56:15,421 INFO L131 PetriNetUnfolder]: For 352/352 co-relation queries the response was YES. [2023-08-31 11:56:15,421 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 11:56:15,422 INFO L208 CegarLoopForPetriNet]: trace histogram [13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 11:56:15,422 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 11:56:15,422 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 11:56:15,422 INFO L85 PathProgramCache]: Analyzing trace with hash 157172777, now seen corresponding path program 1 times [2023-08-31 11:56:15,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 11:56:15,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122331469] [2023-08-31 11:56:15,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 11:56:15,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 11:56:15,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:56:15,437 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 11:56:15,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:56:15,455 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 11:56:15,455 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 11:56:15,455 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 11:56:15,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-31 11:56:15,456 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 11:56:15,458 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 11:56:15,458 WARN L233 ceAbstractionStarter]: 12 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 11:56:15,458 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 13 thread instances. [2023-08-31 11:56:15,514 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 11:56:15,518 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 663 places, 663 transitions, 1547 flow [2023-08-31 11:56:15,692 INFO L130 PetriNetUnfolder]: 40/817 cut-off events. [2023-08-31 11:56:15,692 INFO L131 PetriNetUnfolder]: For 442/442 co-relation queries the response was YES. [2023-08-31 11:56:15,706 INFO L83 FinitePrefix]: Finished finitePrefix Result has 948 conditions, 817 events. 40/817 cut-off events. For 442/442 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 3689 event pairs, 0 based on Foata normal form. 0/568 useless extension candidates. Maximal degree in co-relation 860. Up to 28 conditions per place. [2023-08-31 11:56:15,706 INFO L82 GeneralOperation]: Start removeDead. Operand has 663 places, 663 transitions, 1547 flow [2023-08-31 11:56:15,711 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 663 places, 663 transitions, 1547 flow [2023-08-31 11:56:15,711 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 11:56:15,712 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 663 places, 663 transitions, 1547 flow [2023-08-31 11:56:15,712 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 663 places, 663 transitions, 1547 flow [2023-08-31 11:56:15,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 663 places, 663 transitions, 1547 flow [2023-08-31 11:56:15,848 INFO L130 PetriNetUnfolder]: 40/817 cut-off events. [2023-08-31 11:56:15,849 INFO L131 PetriNetUnfolder]: For 442/442 co-relation queries the response was YES. [2023-08-31 11:56:15,861 INFO L83 FinitePrefix]: Finished finitePrefix Result has 948 conditions, 817 events. 40/817 cut-off events. For 442/442 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 3689 event pairs, 0 based on Foata normal form. 0/568 useless extension candidates. Maximal degree in co-relation 860. Up to 28 conditions per place. [2023-08-31 11:56:15,912 INFO L119 LiptonReduction]: Number of co-enabled transitions 383136 [2023-08-31 11:56:18,401 INFO L134 LiptonReduction]: Checked pairs total: 2259904 [2023-08-31 11:56:18,401 INFO L136 LiptonReduction]: Total number of compositions: 320 [2023-08-31 11:56:18,418 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 11:56:18,420 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;@3651a7b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 11:56:18,420 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 11:56:18,523 INFO L130 PetriNetUnfolder]: 10/456 cut-off events. [2023-08-31 11:56:18,523 INFO L131 PetriNetUnfolder]: For 442/442 co-relation queries the response was YES. [2023-08-31 11:56:18,523 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 11:56:18,523 INFO L208 CegarLoopForPetriNet]: trace histogram [14, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 11:56:18,523 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 11:56:18,524 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 11:56:18,524 INFO L85 PathProgramCache]: Analyzing trace with hash -118158147, now seen corresponding path program 1 times [2023-08-31 11:56:18,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 11:56:18,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839659213] [2023-08-31 11:56:18,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 11:56:18,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 11:56:18,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:56:18,540 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 11:56:18,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:56:18,555 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 11:56:18,555 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 11:56:18,555 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 11:56:18,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-31 11:56:18,556 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 11:56:18,556 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 11:56:18,556 WARN L233 ceAbstractionStarter]: 13 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 11:56:18,556 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 14 thread instances. [2023-08-31 11:56:18,595 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 11:56:18,598 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 712 places, 712 transitions, 1676 flow [2023-08-31 11:56:18,752 INFO L130 PetriNetUnfolder]: 43/878 cut-off events. [2023-08-31 11:56:18,752 INFO L131 PetriNetUnfolder]: For 546/546 co-relation queries the response was YES. [2023-08-31 11:56:18,767 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1026 conditions, 878 events. 43/878 cut-off events. For 546/546 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 3977 event pairs, 0 based on Foata normal form. 0/610 useless extension candidates. Maximal degree in co-relation 937. Up to 30 conditions per place. [2023-08-31 11:56:18,767 INFO L82 GeneralOperation]: Start removeDead. Operand has 712 places, 712 transitions, 1676 flow [2023-08-31 11:56:18,771 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 712 places, 712 transitions, 1676 flow [2023-08-31 11:56:18,771 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 11:56:18,772 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 712 places, 712 transitions, 1676 flow [2023-08-31 11:56:18,772 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 712 places, 712 transitions, 1676 flow [2023-08-31 11:56:18,772 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 712 places, 712 transitions, 1676 flow [2023-08-31 11:56:18,944 INFO L130 PetriNetUnfolder]: 43/878 cut-off events. [2023-08-31 11:56:18,945 INFO L131 PetriNetUnfolder]: For 546/546 co-relation queries the response was YES. [2023-08-31 11:56:18,959 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1026 conditions, 878 events. 43/878 cut-off events. For 546/546 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 3977 event pairs, 0 based on Foata normal form. 0/610 useless extension candidates. Maximal degree in co-relation 937. Up to 30 conditions per place. [2023-08-31 11:56:19,015 INFO L119 LiptonReduction]: Number of co-enabled transitions 445536 [2023-08-31 11:56:21,783 INFO L134 LiptonReduction]: Checked pairs total: 2631041 [2023-08-31 11:56:21,783 INFO L136 LiptonReduction]: Total number of compositions: 359 [2023-08-31 11:56:21,784 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 11:56:21,784 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;@3651a7b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 11:56:21,785 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 11:56:21,848 INFO L130 PetriNetUnfolder]: 11/496 cut-off events. [2023-08-31 11:56:21,848 INFO L131 PetriNetUnfolder]: For 546/546 co-relation queries the response was YES. [2023-08-31 11:56:21,848 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 11:56:21,849 INFO L208 CegarLoopForPetriNet]: trace histogram [15, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 11:56:21,849 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 11:56:21,849 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 11:56:21,849 INFO L85 PathProgramCache]: Analyzing trace with hash -1557454300, now seen corresponding path program 1 times [2023-08-31 11:56:21,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 11:56:21,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182403671] [2023-08-31 11:56:21,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 11:56:21,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 11:56:21,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:56:21,886 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 11:56:21,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:56:21,900 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 11:56:21,900 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 11:56:21,900 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 11:56:21,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-31 11:56:21,900 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 11:56:21,901 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 11:56:21,901 WARN L233 ceAbstractionStarter]: 14 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 11:56:21,901 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 15 thread instances. [2023-08-31 11:56:21,946 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 11:56:21,949 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 761 places, 761 transitions, 1807 flow [2023-08-31 11:56:22,139 INFO L130 PetriNetUnfolder]: 46/939 cut-off events. [2023-08-31 11:56:22,139 INFO L131 PetriNetUnfolder]: For 665/665 co-relation queries the response was YES. [2023-08-31 11:56:22,156 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1105 conditions, 939 events. 46/939 cut-off events. For 665/665 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 4276 event pairs, 0 based on Foata normal form. 0/652 useless extension candidates. Maximal degree in co-relation 1015. Up to 32 conditions per place. [2023-08-31 11:56:22,157 INFO L82 GeneralOperation]: Start removeDead. Operand has 761 places, 761 transitions, 1807 flow [2023-08-31 11:56:22,161 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 761 places, 761 transitions, 1807 flow [2023-08-31 11:56:22,162 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 11:56:22,162 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 761 places, 761 transitions, 1807 flow [2023-08-31 11:56:22,162 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 761 places, 761 transitions, 1807 flow [2023-08-31 11:56:22,162 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 761 places, 761 transitions, 1807 flow [2023-08-31 11:56:22,384 INFO L130 PetriNetUnfolder]: 46/939 cut-off events. [2023-08-31 11:56:22,384 INFO L131 PetriNetUnfolder]: For 665/665 co-relation queries the response was YES. [2023-08-31 11:56:22,397 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1105 conditions, 939 events. 46/939 cut-off events. For 665/665 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 4276 event pairs, 0 based on Foata normal form. 0/652 useless extension candidates. Maximal degree in co-relation 1015. Up to 32 conditions per place. [2023-08-31 11:56:22,457 INFO L119 LiptonReduction]: Number of co-enabled transitions 512640 [2023-08-31 11:56:25,190 INFO L134 LiptonReduction]: Checked pairs total: 3019422 [2023-08-31 11:56:25,190 INFO L136 LiptonReduction]: Total number of compositions: 369 [2023-08-31 11:56:25,192 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 11:56:25,193 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;@3651a7b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 11:56:25,193 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 11:56:25,270 INFO L130 PetriNetUnfolder]: 12/536 cut-off events. [2023-08-31 11:56:25,270 INFO L131 PetriNetUnfolder]: For 665/665 co-relation queries the response was YES. [2023-08-31 11:56:25,270 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 11:56:25,270 INFO L208 CegarLoopForPetriNet]: trace histogram [16, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 11:56:25,270 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 11:56:25,271 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 11:56:25,271 INFO L85 PathProgramCache]: Analyzing trace with hash 1441900513, now seen corresponding path program 1 times [2023-08-31 11:56:25,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 11:56:25,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148935318] [2023-08-31 11:56:25,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 11:56:25,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 11:56:25,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:56:25,286 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 11:56:25,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:56:25,301 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 11:56:25,301 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 11:56:25,301 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 11:56:25,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-31 11:56:25,302 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 11:56:25,302 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 11:56:25,302 WARN L233 ceAbstractionStarter]: 15 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 11:56:25,302 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 16 thread instances. [2023-08-31 11:56:25,356 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 11:56:25,360 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 810 places, 810 transitions, 1940 flow [2023-08-31 11:56:25,630 INFO L130 PetriNetUnfolder]: 49/1000 cut-off events. [2023-08-31 11:56:25,630 INFO L131 PetriNetUnfolder]: For 800/800 co-relation queries the response was YES. [2023-08-31 11:56:25,648 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1185 conditions, 1000 events. 49/1000 cut-off events. For 800/800 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 4576 event pairs, 0 based on Foata normal form. 0/694 useless extension candidates. Maximal degree in co-relation 1094. Up to 34 conditions per place. [2023-08-31 11:56:25,648 INFO L82 GeneralOperation]: Start removeDead. Operand has 810 places, 810 transitions, 1940 flow [2023-08-31 11:56:25,653 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 810 places, 810 transitions, 1940 flow [2023-08-31 11:56:25,653 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 11:56:25,653 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 810 places, 810 transitions, 1940 flow [2023-08-31 11:56:25,653 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 810 places, 810 transitions, 1940 flow [2023-08-31 11:56:25,654 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 810 places, 810 transitions, 1940 flow [2023-08-31 11:56:25,863 INFO L130 PetriNetUnfolder]: 49/1000 cut-off events. [2023-08-31 11:56:25,863 INFO L131 PetriNetUnfolder]: For 800/800 co-relation queries the response was YES. [2023-08-31 11:56:25,882 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1185 conditions, 1000 events. 49/1000 cut-off events. For 800/800 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 4576 event pairs, 0 based on Foata normal form. 0/694 useless extension candidates. Maximal degree in co-relation 1094. Up to 34 conditions per place. [2023-08-31 11:56:25,964 INFO L119 LiptonReduction]: Number of co-enabled transitions 584448 [2023-08-31 11:56:28,245 INFO L134 LiptonReduction]: Checked pairs total: 3475953 [2023-08-31 11:56:28,245 INFO L136 LiptonReduction]: Total number of compositions: 397 [2023-08-31 11:56:28,246 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 11:56:28,246 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;@3651a7b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 11:56:28,246 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 11:56:28,344 INFO L130 PetriNetUnfolder]: 13/576 cut-off events. [2023-08-31 11:56:28,344 INFO L131 PetriNetUnfolder]: For 800/800 co-relation queries the response was YES. [2023-08-31 11:56:28,344 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 11:56:28,344 INFO L208 CegarLoopForPetriNet]: trace histogram [17, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 11:56:28,344 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 11:56:28,344 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 11:56:28,345 INFO L85 PathProgramCache]: Analyzing trace with hash -1707043670, now seen corresponding path program 1 times [2023-08-31 11:56:28,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 11:56:28,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073782078] [2023-08-31 11:56:28,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 11:56:28,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 11:56:28,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:56:28,362 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 11:56:28,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:56:28,377 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 11:56:28,377 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 11:56:28,377 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 11:56:28,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-31 11:56:28,378 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 11:56:28,378 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 11:56:28,378 WARN L233 ceAbstractionStarter]: 16 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 11:56:28,378 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 17 thread instances. [2023-08-31 11:56:28,420 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 11:56:28,423 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 859 places, 859 transitions, 2075 flow [2023-08-31 11:56:28,664 INFO L130 PetriNetUnfolder]: 52/1061 cut-off events. [2023-08-31 11:56:28,664 INFO L131 PetriNetUnfolder]: For 952/952 co-relation queries the response was YES. [2023-08-31 11:56:28,686 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1266 conditions, 1061 events. 52/1061 cut-off events. For 952/952 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 4883 event pairs, 0 based on Foata normal form. 0/736 useless extension candidates. Maximal degree in co-relation 1174. Up to 36 conditions per place. [2023-08-31 11:56:28,687 INFO L82 GeneralOperation]: Start removeDead. Operand has 859 places, 859 transitions, 2075 flow [2023-08-31 11:56:28,693 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 859 places, 859 transitions, 2075 flow [2023-08-31 11:56:28,693 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 11:56:28,693 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 859 places, 859 transitions, 2075 flow [2023-08-31 11:56:28,693 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 859 places, 859 transitions, 2075 flow [2023-08-31 11:56:28,693 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 859 places, 859 transitions, 2075 flow [2023-08-31 11:56:28,940 INFO L130 PetriNetUnfolder]: 52/1061 cut-off events. [2023-08-31 11:56:28,940 INFO L131 PetriNetUnfolder]: For 952/952 co-relation queries the response was YES. [2023-08-31 11:56:28,960 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1266 conditions, 1061 events. 52/1061 cut-off events. For 952/952 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 4883 event pairs, 0 based on Foata normal form. 0/736 useless extension candidates. Maximal degree in co-relation 1174. Up to 36 conditions per place. [2023-08-31 11:56:29,049 INFO L119 LiptonReduction]: Number of co-enabled transitions 660960 [2023-08-31 11:56:32,067 INFO L134 LiptonReduction]: Checked pairs total: 3917300 [2023-08-31 11:56:32,067 INFO L136 LiptonReduction]: Total number of compositions: 420 [2023-08-31 11:56:32,068 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 11:56:32,069 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;@3651a7b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 11:56:32,069 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 11:56:32,194 INFO L130 PetriNetUnfolder]: 14/616 cut-off events. [2023-08-31 11:56:32,194 INFO L131 PetriNetUnfolder]: For 952/952 co-relation queries the response was YES. [2023-08-31 11:56:32,195 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 11:56:32,195 INFO L208 CegarLoopForPetriNet]: trace histogram [18, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 11:56:32,195 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 11:56:32,195 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 11:56:32,195 INFO L85 PathProgramCache]: Analyzing trace with hash 1775818388, now seen corresponding path program 1 times [2023-08-31 11:56:32,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 11:56:32,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370519080] [2023-08-31 11:56:32,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 11:56:32,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 11:56:32,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:56:32,213 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 11:56:32,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:56:32,230 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 11:56:32,230 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 11:56:32,230 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 11:56:32,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-31 11:56:32,231 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 11:56:32,231 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 11:56:32,231 WARN L233 ceAbstractionStarter]: 17 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 11:56:32,231 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 18 thread instances. [2023-08-31 11:56:32,280 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 11:56:32,284 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 908 places, 908 transitions, 2212 flow [2023-08-31 11:56:32,550 INFO L130 PetriNetUnfolder]: 55/1122 cut-off events. [2023-08-31 11:56:32,551 INFO L131 PetriNetUnfolder]: For 1122/1122 co-relation queries the response was YES. [2023-08-31 11:56:32,576 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1348 conditions, 1122 events. 55/1122 cut-off events. For 1122/1122 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 5160 event pairs, 0 based on Foata normal form. 0/778 useless extension candidates. Maximal degree in co-relation 1255. Up to 38 conditions per place. [2023-08-31 11:56:32,577 INFO L82 GeneralOperation]: Start removeDead. Operand has 908 places, 908 transitions, 2212 flow [2023-08-31 11:56:32,583 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 908 places, 908 transitions, 2212 flow [2023-08-31 11:56:32,583 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 11:56:32,583 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 908 places, 908 transitions, 2212 flow [2023-08-31 11:56:32,584 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 908 places, 908 transitions, 2212 flow [2023-08-31 11:56:32,584 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 908 places, 908 transitions, 2212 flow [2023-08-31 11:56:32,885 INFO L130 PetriNetUnfolder]: 55/1122 cut-off events. [2023-08-31 11:56:32,885 INFO L131 PetriNetUnfolder]: For 1122/1122 co-relation queries the response was YES. [2023-08-31 11:56:32,906 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1348 conditions, 1122 events. 55/1122 cut-off events. For 1122/1122 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 5160 event pairs, 0 based on Foata normal form. 0/778 useless extension candidates. Maximal degree in co-relation 1255. Up to 38 conditions per place. [2023-08-31 11:56:33,002 INFO L119 LiptonReduction]: Number of co-enabled transitions 742176 [2023-08-31 11:56:36,437 INFO L134 LiptonReduction]: Checked pairs total: 3743413 [2023-08-31 11:56:36,438 INFO L136 LiptonReduction]: Total number of compositions: 439 [2023-08-31 11:56:36,458 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 11:56:36,459 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;@3651a7b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 11:56:36,459 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 11:56:36,596 INFO L130 PetriNetUnfolder]: 15/656 cut-off events. [2023-08-31 11:56:36,596 INFO L131 PetriNetUnfolder]: For 1122/1122 co-relation queries the response was YES. [2023-08-31 11:56:36,596 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 11:56:36,596 INFO L208 CegarLoopForPetriNet]: trace histogram [19, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 11:56:36,598 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 11:56:36,599 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 11:56:36,599 INFO L85 PathProgramCache]: Analyzing trace with hash -884882594, now seen corresponding path program 1 times [2023-08-31 11:56:36,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 11:56:36,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019008677] [2023-08-31 11:56:36,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 11:56:36,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 11:56:36,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:56:36,652 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 11:56:36,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:56:36,701 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 11:56:36,710 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 11:56:36,710 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 11:56:36,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-31 11:56:36,711 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 11:56:36,711 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 11:56:36,711 WARN L233 ceAbstractionStarter]: 18 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 11:56:36,711 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 19 thread instances. [2023-08-31 11:56:36,795 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 11:56:36,799 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 957 places, 957 transitions, 2351 flow [2023-08-31 11:56:37,159 INFO L130 PetriNetUnfolder]: 58/1183 cut-off events. [2023-08-31 11:56:37,160 INFO L131 PetriNetUnfolder]: For 1311/1311 co-relation queries the response was YES. [2023-08-31 11:56:37,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1431 conditions, 1183 events. 58/1183 cut-off events. For 1311/1311 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 5476 event pairs, 0 based on Foata normal form. 0/820 useless extension candidates. Maximal degree in co-relation 1337. Up to 40 conditions per place. [2023-08-31 11:56:37,184 INFO L82 GeneralOperation]: Start removeDead. Operand has 957 places, 957 transitions, 2351 flow [2023-08-31 11:56:37,190 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 957 places, 957 transitions, 2351 flow [2023-08-31 11:56:37,190 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 11:56:37,190 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 957 places, 957 transitions, 2351 flow [2023-08-31 11:56:37,191 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 957 places, 957 transitions, 2351 flow [2023-08-31 11:56:37,191 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 957 places, 957 transitions, 2351 flow [2023-08-31 11:56:37,520 INFO L130 PetriNetUnfolder]: 58/1183 cut-off events. [2023-08-31 11:56:37,520 INFO L131 PetriNetUnfolder]: For 1311/1311 co-relation queries the response was YES. [2023-08-31 11:56:37,549 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1431 conditions, 1183 events. 58/1183 cut-off events. For 1311/1311 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 5476 event pairs, 0 based on Foata normal form. 0/820 useless extension candidates. Maximal degree in co-relation 1337. Up to 40 conditions per place. [2023-08-31 11:56:37,677 INFO L119 LiptonReduction]: Number of co-enabled transitions 828096 [2023-08-31 11:56:40,875 INFO L134 LiptonReduction]: Checked pairs total: 4901041 [2023-08-31 11:56:40,876 INFO L136 LiptonReduction]: Total number of compositions: 459 [2023-08-31 11:56:40,881 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 11:56:40,881 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;@3651a7b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 11:56:40,881 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 11:56:40,996 INFO L130 PetriNetUnfolder]: 16/696 cut-off events. [2023-08-31 11:56:40,996 INFO L131 PetriNetUnfolder]: For 1311/1311 co-relation queries the response was YES. [2023-08-31 11:56:40,996 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 11:56:40,996 INFO L208 CegarLoopForPetriNet]: trace histogram [20, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 11:56:40,997 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 11:56:40,997 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 11:56:40,997 INFO L85 PathProgramCache]: Analyzing trace with hash -1192459100, now seen corresponding path program 1 times [2023-08-31 11:56:40,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 11:56:40,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934553217] [2023-08-31 11:56:40,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 11:56:40,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 11:56:41,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:56:41,015 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 11:56:41,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:56:41,035 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 11:56:41,035 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 11:56:41,035 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 11:56:41,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-08-31 11:56:41,035 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 11:56:41,035 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 11:56:41,036 WARN L233 ceAbstractionStarter]: 19 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 11:56:41,036 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 20 thread instances. [2023-08-31 11:56:41,096 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 11:56:41,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1006 places, 1006 transitions, 2492 flow [2023-08-31 11:56:41,437 INFO L130 PetriNetUnfolder]: 61/1244 cut-off events. [2023-08-31 11:56:41,437 INFO L131 PetriNetUnfolder]: For 1520/1520 co-relation queries the response was YES. [2023-08-31 11:56:41,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1515 conditions, 1244 events. 61/1244 cut-off events. For 1520/1520 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 5795 event pairs, 0 based on Foata normal form. 0/862 useless extension candidates. Maximal degree in co-relation 1420. Up to 42 conditions per place. [2023-08-31 11:56:41,468 INFO L82 GeneralOperation]: Start removeDead. Operand has 1006 places, 1006 transitions, 2492 flow [2023-08-31 11:56:41,474 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1006 places, 1006 transitions, 2492 flow [2023-08-31 11:56:41,475 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 11:56:41,475 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1006 places, 1006 transitions, 2492 flow [2023-08-31 11:56:41,475 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1006 places, 1006 transitions, 2492 flow [2023-08-31 11:56:41,475 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1006 places, 1006 transitions, 2492 flow [2023-08-31 11:56:41,807 INFO L130 PetriNetUnfolder]: 61/1244 cut-off events. [2023-08-31 11:56:41,808 INFO L131 PetriNetUnfolder]: For 1520/1520 co-relation queries the response was YES. [2023-08-31 11:56:41,842 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1515 conditions, 1244 events. 61/1244 cut-off events. For 1520/1520 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 5795 event pairs, 0 based on Foata normal form. 0/862 useless extension candidates. Maximal degree in co-relation 1420. Up to 42 conditions per place. [2023-08-31 11:56:41,985 INFO L119 LiptonReduction]: Number of co-enabled transitions 918720 [2023-08-31 11:56:45,810 INFO L134 LiptonReduction]: Checked pairs total: 5439399 [2023-08-31 11:56:45,810 INFO L136 LiptonReduction]: Total number of compositions: 492 [2023-08-31 11:56:45,812 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 11:56:45,812 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;@3651a7b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 11:56:45,812 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 11:56:45,982 INFO L130 PetriNetUnfolder]: 17/736 cut-off events. [2023-08-31 11:56:45,982 INFO L131 PetriNetUnfolder]: For 1520/1520 co-relation queries the response was YES. [2023-08-31 11:56:45,982 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 11:56:45,982 INFO L208 CegarLoopForPetriNet]: trace histogram [21, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 11:56:45,982 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 11:56:45,983 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 11:56:45,983 INFO L85 PathProgramCache]: Analyzing trace with hash 1483064596, now seen corresponding path program 1 times [2023-08-31 11:56:45,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 11:56:45,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907395226] [2023-08-31 11:56:45,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 11:56:45,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 11:56:46,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:56:46,005 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 11:56:46,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:56:46,027 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 11:56:46,028 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 11:56:46,028 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 11:56:46,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-08-31 11:56:46,028 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 11:56:46,028 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 11:56:46,029 WARN L233 ceAbstractionStarter]: 20 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 11:56:46,029 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 21 thread instances. [2023-08-31 11:56:46,089 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 11:56:46,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1055 places, 1055 transitions, 2635 flow [2023-08-31 11:56:46,474 INFO L130 PetriNetUnfolder]: 64/1305 cut-off events. [2023-08-31 11:56:46,474 INFO L131 PetriNetUnfolder]: For 1750/1750 co-relation queries the response was YES. [2023-08-31 11:56:46,511 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1600 conditions, 1305 events. 64/1305 cut-off events. For 1750/1750 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 6056 event pairs, 0 based on Foata normal form. 0/904 useless extension candidates. Maximal degree in co-relation 1504. Up to 44 conditions per place. [2023-08-31 11:56:46,511 INFO L82 GeneralOperation]: Start removeDead. Operand has 1055 places, 1055 transitions, 2635 flow [2023-08-31 11:56:46,519 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1055 places, 1055 transitions, 2635 flow [2023-08-31 11:56:46,519 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 11:56:46,520 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1055 places, 1055 transitions, 2635 flow [2023-08-31 11:56:46,520 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1055 places, 1055 transitions, 2635 flow [2023-08-31 11:56:46,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1055 places, 1055 transitions, 2635 flow [2023-08-31 11:56:46,930 INFO L130 PetriNetUnfolder]: 64/1305 cut-off events. [2023-08-31 11:56:46,931 INFO L131 PetriNetUnfolder]: For 1750/1750 co-relation queries the response was YES. [2023-08-31 11:56:46,960 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1600 conditions, 1305 events. 64/1305 cut-off events. For 1750/1750 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 6056 event pairs, 0 based on Foata normal form. 0/904 useless extension candidates. Maximal degree in co-relation 1504. Up to 44 conditions per place. [2023-08-31 11:56:47,097 INFO L119 LiptonReduction]: Number of co-enabled transitions 1014048 [2023-08-31 11:56:51,171 INFO L134 LiptonReduction]: Checked pairs total: 6073447 [2023-08-31 11:56:51,172 INFO L136 LiptonReduction]: Total number of compositions: 514 [2023-08-31 11:56:51,173 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 11:56:51,174 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;@3651a7b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 11:56:51,174 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 11:56:51,314 INFO L130 PetriNetUnfolder]: 18/776 cut-off events. [2023-08-31 11:56:51,314 INFO L131 PetriNetUnfolder]: For 1750/1750 co-relation queries the response was YES. [2023-08-31 11:56:51,314 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 11:56:51,314 INFO L208 CegarLoopForPetriNet]: trace histogram [22, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 11:56:51,314 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 11:56:51,315 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 11:56:51,315 INFO L85 PathProgramCache]: Analyzing trace with hash -567635436, now seen corresponding path program 1 times [2023-08-31 11:56:51,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 11:56:51,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459429513] [2023-08-31 11:56:51,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 11:56:51,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 11:56:51,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:56:51,334 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 11:56:51,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:56:51,353 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 11:56:51,353 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 11:56:51,353 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 11:56:51,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-08-31 11:56:51,353 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 11:56:51,354 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 11:56:51,354 WARN L233 ceAbstractionStarter]: 21 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 11:56:51,354 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 22 thread instances. [2023-08-31 11:56:51,409 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 11:56:51,413 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1104 places, 1104 transitions, 2780 flow [2023-08-31 11:56:51,816 INFO L130 PetriNetUnfolder]: 67/1366 cut-off events. [2023-08-31 11:56:51,816 INFO L131 PetriNetUnfolder]: For 2002/2002 co-relation queries the response was YES. [2023-08-31 11:56:51,858 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1686 conditions, 1366 events. 67/1366 cut-off events. For 2002/2002 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 6395 event pairs, 0 based on Foata normal form. 0/946 useless extension candidates. Maximal degree in co-relation 1589. Up to 46 conditions per place. [2023-08-31 11:56:51,858 INFO L82 GeneralOperation]: Start removeDead. Operand has 1104 places, 1104 transitions, 2780 flow [2023-08-31 11:56:51,867 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1104 places, 1104 transitions, 2780 flow [2023-08-31 11:56:51,867 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 11:56:51,867 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1104 places, 1104 transitions, 2780 flow [2023-08-31 11:56:51,867 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1104 places, 1104 transitions, 2780 flow [2023-08-31 11:56:51,867 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1104 places, 1104 transitions, 2780 flow [2023-08-31 11:56:52,299 INFO L130 PetriNetUnfolder]: 67/1366 cut-off events. [2023-08-31 11:56:52,300 INFO L131 PetriNetUnfolder]: For 2002/2002 co-relation queries the response was YES. [2023-08-31 11:56:52,338 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1686 conditions, 1366 events. 67/1366 cut-off events. For 2002/2002 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 6395 event pairs, 0 based on Foata normal form. 0/946 useless extension candidates. Maximal degree in co-relation 1589. Up to 46 conditions per place. [2023-08-31 11:56:52,505 INFO L119 LiptonReduction]: Number of co-enabled transitions 1114080 [2023-08-31 11:56:56,837 INFO L134 LiptonReduction]: Checked pairs total: 6664989 [2023-08-31 11:56:56,837 INFO L136 LiptonReduction]: Total number of compositions: 539 [2023-08-31 11:56:56,839 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 11:56:56,839 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;@3651a7b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 11:56:56,839 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 11:56:57,003 INFO L130 PetriNetUnfolder]: 19/816 cut-off events. [2023-08-31 11:56:57,003 INFO L131 PetriNetUnfolder]: For 2002/2002 co-relation queries the response was YES. [2023-08-31 11:56:57,004 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 11:56:57,004 INFO L208 CegarLoopForPetriNet]: trace histogram [23, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 11:56:57,004 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 11:56:57,004 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 11:56:57,004 INFO L85 PathProgramCache]: Analyzing trace with hash -1483028855, now seen corresponding path program 1 times [2023-08-31 11:56:57,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 11:56:57,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088537150] [2023-08-31 11:56:57,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 11:56:57,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 11:56:57,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:56:57,025 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 11:56:57,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:56:57,045 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 11:56:57,052 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 11:56:57,053 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 11:56:57,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-08-31 11:56:57,053 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 11:56:57,054 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 11:56:57,054 WARN L233 ceAbstractionStarter]: 22 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 11:56:57,054 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 23 thread instances. [2023-08-31 11:56:57,117 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 11:56:57,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1153 places, 1153 transitions, 2927 flow [2023-08-31 11:56:57,665 INFO L130 PetriNetUnfolder]: 70/1427 cut-off events. [2023-08-31 11:56:57,665 INFO L131 PetriNetUnfolder]: For 2277/2277 co-relation queries the response was YES. [2023-08-31 11:56:57,706 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1773 conditions, 1427 events. 70/1427 cut-off events. For 2277/2277 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 6702 event pairs, 0 based on Foata normal form. 0/988 useless extension candidates. Maximal degree in co-relation 1675. Up to 48 conditions per place. [2023-08-31 11:56:57,706 INFO L82 GeneralOperation]: Start removeDead. Operand has 1153 places, 1153 transitions, 2927 flow [2023-08-31 11:56:57,715 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1153 places, 1153 transitions, 2927 flow [2023-08-31 11:56:57,715 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 11:56:57,715 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1153 places, 1153 transitions, 2927 flow [2023-08-31 11:56:57,715 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1153 places, 1153 transitions, 2927 flow [2023-08-31 11:56:57,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1153 places, 1153 transitions, 2927 flow [2023-08-31 11:56:58,149 INFO L130 PetriNetUnfolder]: 70/1427 cut-off events. [2023-08-31 11:56:58,150 INFO L131 PetriNetUnfolder]: For 2277/2277 co-relation queries the response was YES. [2023-08-31 11:56:58,194 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1773 conditions, 1427 events. 70/1427 cut-off events. For 2277/2277 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 6702 event pairs, 0 based on Foata normal form. 0/988 useless extension candidates. Maximal degree in co-relation 1675. Up to 48 conditions per place. [2023-08-31 11:56:58,392 INFO L119 LiptonReduction]: Number of co-enabled transitions 1218816 [2023-08-31 11:57:02,659 INFO L134 LiptonReduction]: Checked pairs total: 7221034 [2023-08-31 11:57:02,660 INFO L136 LiptonReduction]: Total number of compositions: 560 [2023-08-31 11:57:02,661 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 11:57:02,661 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;@3651a7b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 11:57:02,661 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 11:57:02,839 INFO L130 PetriNetUnfolder]: 20/856 cut-off events. [2023-08-31 11:57:02,840 INFO L131 PetriNetUnfolder]: For 2277/2277 co-relation queries the response was YES. [2023-08-31 11:57:02,840 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 11:57:02,840 INFO L208 CegarLoopForPetriNet]: trace histogram [24, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 11:57:02,840 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 11:57:02,840 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 11:57:02,840 INFO L85 PathProgramCache]: Analyzing trace with hash 1572666539, now seen corresponding path program 1 times [2023-08-31 11:57:02,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 11:57:02,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708201821] [2023-08-31 11:57:02,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 11:57:02,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 11:57:02,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:57:02,864 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 11:57:02,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:57:02,885 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 11:57:02,885 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 11:57:02,885 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 11:57:02,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-08-31 11:57:02,886 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 11:57:02,886 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 11:57:02,886 WARN L233 ceAbstractionStarter]: 23 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 11:57:02,886 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 24 thread instances. [2023-08-31 11:57:02,952 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 11:57:02,957 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1202 places, 1202 transitions, 3076 flow [2023-08-31 11:57:03,444 INFO L130 PetriNetUnfolder]: 73/1488 cut-off events. [2023-08-31 11:57:03,444 INFO L131 PetriNetUnfolder]: For 2576/2576 co-relation queries the response was YES. [2023-08-31 11:57:03,492 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1861 conditions, 1488 events. 73/1488 cut-off events. For 2576/2576 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 6985 event pairs, 0 based on Foata normal form. 0/1030 useless extension candidates. Maximal degree in co-relation 1762. Up to 50 conditions per place. [2023-08-31 11:57:03,492 INFO L82 GeneralOperation]: Start removeDead. Operand has 1202 places, 1202 transitions, 3076 flow [2023-08-31 11:57:03,502 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1202 places, 1202 transitions, 3076 flow [2023-08-31 11:57:03,502 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 11:57:03,502 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1202 places, 1202 transitions, 3076 flow [2023-08-31 11:57:03,503 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1202 places, 1202 transitions, 3076 flow [2023-08-31 11:57:03,503 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1202 places, 1202 transitions, 3076 flow [2023-08-31 11:57:03,976 INFO L130 PetriNetUnfolder]: 73/1488 cut-off events. [2023-08-31 11:57:03,976 INFO L131 PetriNetUnfolder]: For 2576/2576 co-relation queries the response was YES. [2023-08-31 11:57:04,026 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1861 conditions, 1488 events. 73/1488 cut-off events. For 2576/2576 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 6985 event pairs, 0 based on Foata normal form. 0/1030 useless extension candidates. Maximal degree in co-relation 1762. Up to 50 conditions per place. [2023-08-31 11:57:04,244 INFO L119 LiptonReduction]: Number of co-enabled transitions 1328256 [2023-08-31 11:57:08,259 INFO L134 LiptonReduction]: Checked pairs total: 7894147 [2023-08-31 11:57:08,260 INFO L136 LiptonReduction]: Total number of compositions: 578 [2023-08-31 11:57:08,262 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 11:57:08,262 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;@3651a7b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 11:57:08,263 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 11:57:08,495 INFO L130 PetriNetUnfolder]: 21/896 cut-off events. [2023-08-31 11:57:08,496 INFO L131 PetriNetUnfolder]: For 2576/2576 co-relation queries the response was YES. [2023-08-31 11:57:08,496 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 11:57:08,496 INFO L208 CegarLoopForPetriNet]: trace histogram [25, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 11:57:08,496 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 11:57:08,496 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 11:57:08,496 INFO L85 PathProgramCache]: Analyzing trace with hash -1895515230, now seen corresponding path program 1 times [2023-08-31 11:57:08,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 11:57:08,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618102473] [2023-08-31 11:57:08,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 11:57:08,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 11:57:08,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:57:08,535 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 11:57:08,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:57:08,566 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 11:57:08,567 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 11:57:08,567 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 11:57:08,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-08-31 11:57:08,567 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 11:57:08,567 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 11:57:08,567 WARN L233 ceAbstractionStarter]: 24 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 11:57:08,568 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 25 thread instances. [2023-08-31 11:57:08,629 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 11:57:08,634 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1251 places, 1251 transitions, 3227 flow [2023-08-31 11:57:09,178 INFO L130 PetriNetUnfolder]: 76/1549 cut-off events. [2023-08-31 11:57:09,178 INFO L131 PetriNetUnfolder]: For 2900/2900 co-relation queries the response was YES. [2023-08-31 11:57:09,233 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1950 conditions, 1549 events. 76/1549 cut-off events. For 2900/2900 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 7293 event pairs, 0 based on Foata normal form. 0/1072 useless extension candidates. Maximal degree in co-relation 1850. Up to 52 conditions per place. [2023-08-31 11:57:09,234 INFO L82 GeneralOperation]: Start removeDead. Operand has 1251 places, 1251 transitions, 3227 flow [2023-08-31 11:57:09,247 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1251 places, 1251 transitions, 3227 flow [2023-08-31 11:57:09,247 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 11:57:09,247 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1251 places, 1251 transitions, 3227 flow [2023-08-31 11:57:09,248 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1251 places, 1251 transitions, 3227 flow [2023-08-31 11:57:09,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1251 places, 1251 transitions, 3227 flow [2023-08-31 11:57:09,822 INFO L130 PetriNetUnfolder]: 76/1549 cut-off events. [2023-08-31 11:57:09,822 INFO L131 PetriNetUnfolder]: For 2900/2900 co-relation queries the response was YES. [2023-08-31 11:57:09,864 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1950 conditions, 1549 events. 76/1549 cut-off events. For 2900/2900 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 7293 event pairs, 0 based on Foata normal form. 0/1072 useless extension candidates. Maximal degree in co-relation 1850. Up to 52 conditions per place. [2023-08-31 11:57:10,060 INFO L119 LiptonReduction]: Number of co-enabled transitions 1442400 [2023-08-31 11:57:14,716 INFO L134 LiptonReduction]: Checked pairs total: 8586230 [2023-08-31 11:57:14,716 INFO L136 LiptonReduction]: Total number of compositions: 605 [2023-08-31 11:57:14,718 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 11:57:14,718 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;@3651a7b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 11:57:14,718 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 11:57:14,956 INFO L130 PetriNetUnfolder]: 22/936 cut-off events. [2023-08-31 11:57:14,956 INFO L131 PetriNetUnfolder]: For 2900/2900 co-relation queries the response was YES. [2023-08-31 11:57:14,956 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 11:57:14,956 INFO L208 CegarLoopForPetriNet]: trace histogram [26, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 11:57:14,957 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 11:57:14,957 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 11:57:14,957 INFO L85 PathProgramCache]: Analyzing trace with hash -2125020269, now seen corresponding path program 1 times [2023-08-31 11:57:14,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 11:57:14,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486275360] [2023-08-31 11:57:14,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 11:57:14,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 11:57:15,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:57:15,001 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 11:57:15,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:57:15,030 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 11:57:15,030 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 11:57:15,030 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 11:57:15,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2023-08-31 11:57:15,030 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 11:57:15,031 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 11:57:15,031 WARN L233 ceAbstractionStarter]: 25 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 11:57:15,031 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 26 thread instances. [2023-08-31 11:57:15,111 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 11:57:15,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1300 places, 1300 transitions, 3380 flow [2023-08-31 11:57:15,700 INFO L130 PetriNetUnfolder]: 79/1610 cut-off events. [2023-08-31 11:57:15,700 INFO L131 PetriNetUnfolder]: For 3250/3250 co-relation queries the response was YES. [2023-08-31 11:57:15,761 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2040 conditions, 1610 events. 79/1610 cut-off events. For 3250/3250 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 7575 event pairs, 0 based on Foata normal form. 0/1114 useless extension candidates. Maximal degree in co-relation 1939. Up to 54 conditions per place. [2023-08-31 11:57:15,761 INFO L82 GeneralOperation]: Start removeDead. Operand has 1300 places, 1300 transitions, 3380 flow [2023-08-31 11:57:15,773 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1300 places, 1300 transitions, 3380 flow [2023-08-31 11:57:15,774 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 11:57:15,774 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1300 places, 1300 transitions, 3380 flow [2023-08-31 11:57:15,775 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1300 places, 1300 transitions, 3380 flow [2023-08-31 11:57:15,775 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1300 places, 1300 transitions, 3380 flow [2023-08-31 11:57:16,339 INFO L130 PetriNetUnfolder]: 79/1610 cut-off events. [2023-08-31 11:57:16,340 INFO L131 PetriNetUnfolder]: For 3250/3250 co-relation queries the response was YES. [2023-08-31 11:57:16,395 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2040 conditions, 1610 events. 79/1610 cut-off events. For 3250/3250 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 7575 event pairs, 0 based on Foata normal form. 0/1114 useless extension candidates. Maximal degree in co-relation 1939. Up to 54 conditions per place. [2023-08-31 11:57:16,638 INFO L119 LiptonReduction]: Number of co-enabled transitions 1561248 [2023-08-31 11:57:21,523 INFO L134 LiptonReduction]: Checked pairs total: 9328940 [2023-08-31 11:57:21,524 INFO L136 LiptonReduction]: Total number of compositions: 637 [2023-08-31 11:57:21,525 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 11:57:21,525 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;@3651a7b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 11:57:21,525 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 11:57:21,783 INFO L130 PetriNetUnfolder]: 23/976 cut-off events. [2023-08-31 11:57:21,783 INFO L131 PetriNetUnfolder]: For 3250/3250 co-relation queries the response was YES. [2023-08-31 11:57:21,783 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 11:57:21,784 INFO L208 CegarLoopForPetriNet]: trace histogram [27, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 11:57:21,784 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 11:57:21,784 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 11:57:21,784 INFO L85 PathProgramCache]: Analyzing trace with hash -607571656, now seen corresponding path program 1 times [2023-08-31 11:57:21,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 11:57:21,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710802756] [2023-08-31 11:57:21,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 11:57:21,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 11:57:21,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:57:21,813 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 11:57:21,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:57:21,840 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 11:57:21,841 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 11:57:21,841 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 11:57:21,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2023-08-31 11:57:21,841 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 11:57:21,841 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 11:57:21,842 WARN L233 ceAbstractionStarter]: 26 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 11:57:21,842 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 27 thread instances. [2023-08-31 11:57:21,916 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 11:57:21,922 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1349 places, 1349 transitions, 3535 flow [2023-08-31 11:57:22,649 INFO L130 PetriNetUnfolder]: 82/1671 cut-off events. [2023-08-31 11:57:22,650 INFO L131 PetriNetUnfolder]: For 3627/3627 co-relation queries the response was YES. [2023-08-31 11:57:22,699 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2131 conditions, 1671 events. 82/1671 cut-off events. For 3627/3627 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 7969 event pairs, 0 based on Foata normal form. 0/1156 useless extension candidates. Maximal degree in co-relation 2029. Up to 56 conditions per place. [2023-08-31 11:57:22,699 INFO L82 GeneralOperation]: Start removeDead. Operand has 1349 places, 1349 transitions, 3535 flow [2023-08-31 11:57:22,708 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1349 places, 1349 transitions, 3535 flow [2023-08-31 11:57:22,709 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 11:57:22,709 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1349 places, 1349 transitions, 3535 flow [2023-08-31 11:57:22,709 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1349 places, 1349 transitions, 3535 flow [2023-08-31 11:57:22,709 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1349 places, 1349 transitions, 3535 flow [2023-08-31 11:57:23,333 INFO L130 PetriNetUnfolder]: 82/1671 cut-off events. [2023-08-31 11:57:23,333 INFO L131 PetriNetUnfolder]: For 3627/3627 co-relation queries the response was YES. [2023-08-31 11:57:23,398 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2131 conditions, 1671 events. 82/1671 cut-off events. For 3627/3627 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 7969 event pairs, 0 based on Foata normal form. 0/1156 useless extension candidates. Maximal degree in co-relation 2029. Up to 56 conditions per place. [2023-08-31 11:57:23,687 INFO L119 LiptonReduction]: Number of co-enabled transitions 1684800 [2023-08-31 11:57:28,961 INFO L134 LiptonReduction]: Checked pairs total: 8600018 [2023-08-31 11:57:28,961 INFO L136 LiptonReduction]: Total number of compositions: 651 [2023-08-31 11:57:28,962 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 11:57:28,962 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;@3651a7b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 11:57:28,963 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 11:57:29,248 INFO L130 PetriNetUnfolder]: 24/1016 cut-off events. [2023-08-31 11:57:29,249 INFO L131 PetriNetUnfolder]: For 3627/3627 co-relation queries the response was YES. [2023-08-31 11:57:29,249 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 11:57:29,249 INFO L208 CegarLoopForPetriNet]: trace histogram [28, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 11:57:29,249 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 11:57:29,249 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 11:57:29,249 INFO L85 PathProgramCache]: Analyzing trace with hash 376312094, now seen corresponding path program 1 times [2023-08-31 11:57:29,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 11:57:29,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45504231] [2023-08-31 11:57:29,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 11:57:29,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 11:57:29,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:57:29,287 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 11:57:29,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:57:29,315 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 11:57:29,315 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 11:57:29,315 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 11:57:29,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2023-08-31 11:57:29,316 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 11:57:29,316 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 11:57:29,316 WARN L233 ceAbstractionStarter]: 27 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 11:57:29,316 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 28 thread instances. [2023-08-31 11:57:29,392 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 11:57:29,397 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1398 places, 1398 transitions, 3692 flow [2023-08-31 11:57:30,092 INFO L130 PetriNetUnfolder]: 85/1732 cut-off events. [2023-08-31 11:57:30,092 INFO L131 PetriNetUnfolder]: For 4032/4032 co-relation queries the response was YES. [2023-08-31 11:57:30,161 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2223 conditions, 1732 events. 85/1732 cut-off events. For 4032/4032 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 8210 event pairs, 0 based on Foata normal form. 0/1198 useless extension candidates. Maximal degree in co-relation 2120. Up to 58 conditions per place. [2023-08-31 11:57:30,161 INFO L82 GeneralOperation]: Start removeDead. Operand has 1398 places, 1398 transitions, 3692 flow [2023-08-31 11:57:30,174 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1398 places, 1398 transitions, 3692 flow [2023-08-31 11:57:30,174 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 11:57:30,174 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1398 places, 1398 transitions, 3692 flow [2023-08-31 11:57:30,174 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1398 places, 1398 transitions, 3692 flow [2023-08-31 11:57:30,174 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1398 places, 1398 transitions, 3692 flow [2023-08-31 11:57:30,847 INFO L130 PetriNetUnfolder]: 85/1732 cut-off events. [2023-08-31 11:57:30,847 INFO L131 PetriNetUnfolder]: For 4032/4032 co-relation queries the response was YES. [2023-08-31 11:57:30,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2223 conditions, 1732 events. 85/1732 cut-off events. For 4032/4032 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 8210 event pairs, 0 based on Foata normal form. 0/1198 useless extension candidates. Maximal degree in co-relation 2120. Up to 58 conditions per place. [2023-08-31 11:57:31,298 INFO L119 LiptonReduction]: Number of co-enabled transitions 1813056 [2023-08-31 11:57:36,854 INFO L134 LiptonReduction]: Checked pairs total: 10813435 [2023-08-31 11:57:36,854 INFO L136 LiptonReduction]: Total number of compositions: 674 [2023-08-31 11:57:36,856 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 11:57:36,856 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;@3651a7b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 11:57:36,856 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 11:57:37,215 INFO L130 PetriNetUnfolder]: 25/1056 cut-off events. [2023-08-31 11:57:37,215 INFO L131 PetriNetUnfolder]: For 4032/4032 co-relation queries the response was YES. [2023-08-31 11:57:37,215 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 11:57:37,215 INFO L208 CegarLoopForPetriNet]: trace histogram [29, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 11:57:37,216 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 11:57:37,216 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 11:57:37,216 INFO L85 PathProgramCache]: Analyzing trace with hash -513606519, now seen corresponding path program 1 times [2023-08-31 11:57:37,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 11:57:37,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088264965] [2023-08-31 11:57:37,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 11:57:37,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 11:57:37,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:57:37,241 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 11:57:37,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:57:37,265 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 11:57:37,265 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 11:57:37,265 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 11:57:37,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2023-08-31 11:57:37,266 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 11:57:37,266 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 11:57:37,266 WARN L233 ceAbstractionStarter]: 28 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 11:57:37,266 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 29 thread instances. [2023-08-31 11:57:37,344 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 11:57:37,349 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1447 places, 1447 transitions, 3851 flow [2023-08-31 11:57:38,124 INFO L130 PetriNetUnfolder]: 88/1793 cut-off events. [2023-08-31 11:57:38,125 INFO L131 PetriNetUnfolder]: For 4466/4466 co-relation queries the response was YES. [2023-08-31 11:57:38,203 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2316 conditions, 1793 events. 88/1793 cut-off events. For 4466/4466 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 8464 event pairs, 0 based on Foata normal form. 0/1240 useless extension candidates. Maximal degree in co-relation 2212. Up to 60 conditions per place. [2023-08-31 11:57:38,203 INFO L82 GeneralOperation]: Start removeDead. Operand has 1447 places, 1447 transitions, 3851 flow [2023-08-31 11:57:38,219 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1447 places, 1447 transitions, 3851 flow [2023-08-31 11:57:38,219 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 11:57:38,219 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1447 places, 1447 transitions, 3851 flow [2023-08-31 11:57:38,219 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1447 places, 1447 transitions, 3851 flow [2023-08-31 11:57:38,220 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1447 places, 1447 transitions, 3851 flow [2023-08-31 11:57:39,023 INFO L130 PetriNetUnfolder]: 88/1793 cut-off events. [2023-08-31 11:57:39,024 INFO L131 PetriNetUnfolder]: For 4466/4466 co-relation queries the response was YES. [2023-08-31 11:57:39,093 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2316 conditions, 1793 events. 88/1793 cut-off events. For 4466/4466 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 8464 event pairs, 0 based on Foata normal form. 0/1240 useless extension candidates. Maximal degree in co-relation 2212. Up to 60 conditions per place. [2023-08-31 11:57:39,404 INFO L119 LiptonReduction]: Number of co-enabled transitions 1946016 [2023-08-31 11:57:45,360 INFO L134 LiptonReduction]: Checked pairs total: 11607680 [2023-08-31 11:57:45,361 INFO L136 LiptonReduction]: Total number of compositions: 689 [2023-08-31 11:57:45,363 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 11:57:45,363 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;@3651a7b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 11:57:45,363 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 11:57:45,665 INFO L130 PetriNetUnfolder]: 26/1096 cut-off events. [2023-08-31 11:57:45,665 INFO L131 PetriNetUnfolder]: For 4466/4466 co-relation queries the response was YES. [2023-08-31 11:57:45,666 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 11:57:45,666 INFO L208 CegarLoopForPetriNet]: trace histogram [30, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 11:57:45,666 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 11:57:45,666 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 11:57:45,666 INFO L85 PathProgramCache]: Analyzing trace with hash 362046969, now seen corresponding path program 1 times [2023-08-31 11:57:45,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 11:57:45,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059261851] [2023-08-31 11:57:45,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 11:57:45,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 11:57:45,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:57:45,733 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 11:57:45,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:57:45,763 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 11:57:45,763 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 11:57:45,763 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 11:57:45,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2023-08-31 11:57:45,764 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 11:57:45,764 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 11:57:45,764 WARN L233 ceAbstractionStarter]: 29 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 11:57:45,764 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 30 thread instances. [2023-08-31 11:57:45,848 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 11:57:45,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1496 places, 1496 transitions, 4012 flow [2023-08-31 11:57:46,727 INFO L130 PetriNetUnfolder]: 91/1854 cut-off events. [2023-08-31 11:57:46,727 INFO L131 PetriNetUnfolder]: For 4930/4930 co-relation queries the response was YES. [2023-08-31 11:57:46,810 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2410 conditions, 1854 events. 91/1854 cut-off events. For 4930/4930 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 8763 event pairs, 0 based on Foata normal form. 0/1282 useless extension candidates. Maximal degree in co-relation 2305. Up to 62 conditions per place. [2023-08-31 11:57:46,810 INFO L82 GeneralOperation]: Start removeDead. Operand has 1496 places, 1496 transitions, 4012 flow [2023-08-31 11:57:46,825 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1496 places, 1496 transitions, 4012 flow [2023-08-31 11:57:46,825 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 11:57:46,825 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1496 places, 1496 transitions, 4012 flow [2023-08-31 11:57:46,825 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1496 places, 1496 transitions, 4012 flow [2023-08-31 11:57:46,825 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1496 places, 1496 transitions, 4012 flow [2023-08-31 11:57:47,667 INFO L130 PetriNetUnfolder]: 91/1854 cut-off events. [2023-08-31 11:57:47,667 INFO L131 PetriNetUnfolder]: For 4930/4930 co-relation queries the response was YES. [2023-08-31 11:57:47,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2410 conditions, 1854 events. 91/1854 cut-off events. For 4930/4930 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 8763 event pairs, 0 based on Foata normal form. 0/1282 useless extension candidates. Maximal degree in co-relation 2305. Up to 62 conditions per place. [2023-08-31 11:57:48,271 INFO L119 LiptonReduction]: Number of co-enabled transitions 2083680 [2023-08-31 11:57:54,706 INFO L134 LiptonReduction]: Checked pairs total: 12454125 [2023-08-31 11:57:54,707 INFO L136 LiptonReduction]: Total number of compositions: 728 [2023-08-31 11:57:54,708 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 11:57:54,708 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;@3651a7b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 11:57:54,708 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 11:57:55,095 INFO L130 PetriNetUnfolder]: 27/1136 cut-off events. [2023-08-31 11:57:55,095 INFO L131 PetriNetUnfolder]: For 4930/4930 co-relation queries the response was YES. [2023-08-31 11:57:55,095 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 11:57:55,095 INFO L208 CegarLoopForPetriNet]: trace histogram [31, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 11:57:55,096 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 11:57:55,096 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 11:57:55,096 INFO L85 PathProgramCache]: Analyzing trace with hash -769101020, now seen corresponding path program 1 times [2023-08-31 11:57:55,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 11:57:55,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311066141] [2023-08-31 11:57:55,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 11:57:55,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 11:57:55,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:57:55,158 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 11:57:55,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:57:55,194 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 11:57:55,194 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 11:57:55,194 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 11:57:55,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2023-08-31 11:57:55,194 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 11:57:55,195 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 11:57:55,195 WARN L233 ceAbstractionStarter]: 30 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 11:57:55,195 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 31 thread instances. [2023-08-31 11:57:55,276 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 11:57:55,282 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1545 places, 1545 transitions, 4175 flow [2023-08-31 11:57:56,161 INFO L130 PetriNetUnfolder]: 94/1915 cut-off events. [2023-08-31 11:57:56,162 INFO L131 PetriNetUnfolder]: For 5425/5425 co-relation queries the response was YES. [2023-08-31 11:57:56,253 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2505 conditions, 1915 events. 94/1915 cut-off events. For 5425/5425 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 9185 event pairs, 0 based on Foata normal form. 0/1324 useless extension candidates. Maximal degree in co-relation 2399. Up to 64 conditions per place. [2023-08-31 11:57:56,253 INFO L82 GeneralOperation]: Start removeDead. Operand has 1545 places, 1545 transitions, 4175 flow [2023-08-31 11:57:56,270 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1545 places, 1545 transitions, 4175 flow [2023-08-31 11:57:56,270 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 11:57:56,270 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1545 places, 1545 transitions, 4175 flow [2023-08-31 11:57:56,271 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1545 places, 1545 transitions, 4175 flow [2023-08-31 11:57:56,271 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1545 places, 1545 transitions, 4175 flow [2023-08-31 11:57:57,129 INFO L130 PetriNetUnfolder]: 94/1915 cut-off events. [2023-08-31 11:57:57,130 INFO L131 PetriNetUnfolder]: For 5425/5425 co-relation queries the response was YES. [2023-08-31 11:57:57,221 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2505 conditions, 1915 events. 94/1915 cut-off events. For 5425/5425 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 9185 event pairs, 0 based on Foata normal form. 0/1324 useless extension candidates. Maximal degree in co-relation 2399. Up to 64 conditions per place. [2023-08-31 11:57:57,675 INFO L119 LiptonReduction]: Number of co-enabled transitions 2226048 [2023-08-31 11:58:03,691 INFO L134 LiptonReduction]: Checked pairs total: 13352769 [2023-08-31 11:58:03,692 INFO L136 LiptonReduction]: Total number of compositions: 750 [2023-08-31 11:58:03,693 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 11:58:03,693 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;@3651a7b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 11:58:03,693 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 11:58:04,082 INFO L130 PetriNetUnfolder]: 28/1176 cut-off events. [2023-08-31 11:58:04,083 INFO L131 PetriNetUnfolder]: For 5425/5425 co-relation queries the response was YES. [2023-08-31 11:58:04,083 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 11:58:04,083 INFO L208 CegarLoopForPetriNet]: trace histogram [32, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 11:58:04,083 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 11:58:04,083 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 11:58:04,084 INFO L85 PathProgramCache]: Analyzing trace with hash -171994388, now seen corresponding path program 1 times [2023-08-31 11:58:04,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 11:58:04,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936116353] [2023-08-31 11:58:04,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 11:58:04,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 11:58:04,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:58:04,120 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 11:58:04,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:58:04,148 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 11:58:04,149 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 11:58:04,149 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 11:58:04,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2023-08-31 11:58:04,149 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 11:58:04,149 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 11:58:04,149 WARN L233 ceAbstractionStarter]: 31 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 11:58:04,149 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 32 thread instances. [2023-08-31 11:58:04,236 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 11:58:04,242 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1594 places, 1594 transitions, 4340 flow [2023-08-31 11:58:05,183 INFO L130 PetriNetUnfolder]: 97/1976 cut-off events. [2023-08-31 11:58:05,183 INFO L131 PetriNetUnfolder]: For 5952/5952 co-relation queries the response was YES. [2023-08-31 11:58:05,282 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2601 conditions, 1976 events. 97/1976 cut-off events. For 5952/5952 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 9420 event pairs, 0 based on Foata normal form. 0/1366 useless extension candidates. Maximal degree in co-relation 2494. Up to 66 conditions per place. [2023-08-31 11:58:05,282 INFO L82 GeneralOperation]: Start removeDead. Operand has 1594 places, 1594 transitions, 4340 flow [2023-08-31 11:58:05,299 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1594 places, 1594 transitions, 4340 flow [2023-08-31 11:58:05,300 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 11:58:05,300 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1594 places, 1594 transitions, 4340 flow [2023-08-31 11:58:05,300 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1594 places, 1594 transitions, 4340 flow [2023-08-31 11:58:05,300 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1594 places, 1594 transitions, 4340 flow [2023-08-31 11:58:06,269 INFO L130 PetriNetUnfolder]: 97/1976 cut-off events. [2023-08-31 11:58:06,269 INFO L131 PetriNetUnfolder]: For 5952/5952 co-relation queries the response was YES. [2023-08-31 11:58:06,345 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2601 conditions, 1976 events. 97/1976 cut-off events. For 5952/5952 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 9420 event pairs, 0 based on Foata normal form. 0/1366 useless extension candidates. Maximal degree in co-relation 2494. Up to 66 conditions per place. [2023-08-31 11:58:06,703 INFO L119 LiptonReduction]: Number of co-enabled transitions 2373120 [2023-08-31 11:58:13,433 INFO L134 LiptonReduction]: Checked pairs total: 14186224 [2023-08-31 11:58:13,434 INFO L136 LiptonReduction]: Total number of compositions: 777 [2023-08-31 11:58:13,437 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 11:58:13,438 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;@3651a7b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 11:58:13,438 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 11:58:13,824 INFO L130 PetriNetUnfolder]: 29/1216 cut-off events. [2023-08-31 11:58:13,825 INFO L131 PetriNetUnfolder]: For 5952/5952 co-relation queries the response was YES. [2023-08-31 11:58:13,825 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 11:58:13,825 INFO L208 CegarLoopForPetriNet]: trace histogram [33, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 11:58:13,825 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 11:58:13,829 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 11:58:13,829 INFO L85 PathProgramCache]: Analyzing trace with hash -565407457, now seen corresponding path program 1 times [2023-08-31 11:58:13,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 11:58:13,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719590583] [2023-08-31 11:58:13,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 11:58:13,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 11:58:13,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:58:13,893 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 11:58:13,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:58:13,929 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 11:58:13,929 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 11:58:13,930 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 11:58:13,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2023-08-31 11:58:13,930 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 11:58:13,930 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 11:58:13,931 WARN L233 ceAbstractionStarter]: 32 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 11:58:13,931 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 33 thread instances. [2023-08-31 11:58:14,028 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 11:58:14,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1643 places, 1643 transitions, 4507 flow [2023-08-31 11:58:15,161 INFO L130 PetriNetUnfolder]: 100/2037 cut-off events. [2023-08-31 11:58:15,162 INFO L131 PetriNetUnfolder]: For 6512/6512 co-relation queries the response was YES. [2023-08-31 11:58:15,239 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2698 conditions, 2037 events. 100/2037 cut-off events. For 6512/6512 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 9705 event pairs, 0 based on Foata normal form. 0/1408 useless extension candidates. Maximal degree in co-relation 2590. Up to 68 conditions per place. [2023-08-31 11:58:15,239 INFO L82 GeneralOperation]: Start removeDead. Operand has 1643 places, 1643 transitions, 4507 flow [2023-08-31 11:58:15,253 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1643 places, 1643 transitions, 4507 flow [2023-08-31 11:58:15,253 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 11:58:15,253 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1643 places, 1643 transitions, 4507 flow [2023-08-31 11:58:15,254 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1643 places, 1643 transitions, 4507 flow [2023-08-31 11:58:15,254 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1643 places, 1643 transitions, 4507 flow [2023-08-31 11:58:16,251 INFO L130 PetriNetUnfolder]: 100/2037 cut-off events. [2023-08-31 11:58:16,251 INFO L131 PetriNetUnfolder]: For 6512/6512 co-relation queries the response was YES. [2023-08-31 11:58:16,359 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2698 conditions, 2037 events. 100/2037 cut-off events. For 6512/6512 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 9705 event pairs, 0 based on Foata normal form. 0/1408 useless extension candidates. Maximal degree in co-relation 2590. Up to 68 conditions per place. [2023-08-31 11:58:16,853 INFO L119 LiptonReduction]: Number of co-enabled transitions 2524896 [2023-08-31 11:58:23,926 INFO L134 LiptonReduction]: Checked pairs total: 15037034 [2023-08-31 11:58:23,927 INFO L136 LiptonReduction]: Total number of compositions: 801 [2023-08-31 11:58:23,928 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 11:58:23,928 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;@3651a7b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 11:58:23,928 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 11:58:24,334 INFO L130 PetriNetUnfolder]: 30/1256 cut-off events. [2023-08-31 11:58:24,335 INFO L131 PetriNetUnfolder]: For 6512/6512 co-relation queries the response was YES. [2023-08-31 11:58:24,335 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 11:58:24,335 INFO L208 CegarLoopForPetriNet]: trace histogram [34, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 11:58:24,335 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 11:58:24,335 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 11:58:24,335 INFO L85 PathProgramCache]: Analyzing trace with hash 1802884194, now seen corresponding path program 1 times [2023-08-31 11:58:24,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 11:58:24,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62490347] [2023-08-31 11:58:24,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 11:58:24,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 11:58:24,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:58:24,395 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 11:58:24,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:58:24,424 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 11:58:24,424 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 11:58:24,424 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 11:58:24,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2023-08-31 11:58:24,425 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 11:58:24,425 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 11:58:24,425 WARN L233 ceAbstractionStarter]: 33 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 11:58:24,425 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 34 thread instances. [2023-08-31 11:58:24,515 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 11:58:24,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1692 places, 1692 transitions, 4676 flow [2023-08-31 11:58:25,606 INFO L130 PetriNetUnfolder]: 103/2098 cut-off events. [2023-08-31 11:58:25,606 INFO L131 PetriNetUnfolder]: For 7106/7106 co-relation queries the response was YES. [2023-08-31 11:58:25,722 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2796 conditions, 2098 events. 103/2098 cut-off events. For 7106/7106 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 10079 event pairs, 0 based on Foata normal form. 0/1450 useless extension candidates. Maximal degree in co-relation 2687. Up to 70 conditions per place. [2023-08-31 11:58:25,722 INFO L82 GeneralOperation]: Start removeDead. Operand has 1692 places, 1692 transitions, 4676 flow [2023-08-31 11:58:25,742 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1692 places, 1692 transitions, 4676 flow [2023-08-31 11:58:25,742 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 11:58:25,742 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1692 places, 1692 transitions, 4676 flow [2023-08-31 11:58:25,743 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1692 places, 1692 transitions, 4676 flow [2023-08-31 11:58:25,743 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1692 places, 1692 transitions, 4676 flow [2023-08-31 11:58:26,932 INFO L130 PetriNetUnfolder]: 103/2098 cut-off events. [2023-08-31 11:58:26,932 INFO L131 PetriNetUnfolder]: For 7106/7106 co-relation queries the response was YES. [2023-08-31 11:58:27,014 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2796 conditions, 2098 events. 103/2098 cut-off events. For 7106/7106 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 10079 event pairs, 0 based on Foata normal form. 0/1450 useless extension candidates. Maximal degree in co-relation 2687. Up to 70 conditions per place. [2023-08-31 11:58:27,421 INFO L119 LiptonReduction]: Number of co-enabled transitions 2681376 [2023-08-31 11:58:34,976 INFO L134 LiptonReduction]: Checked pairs total: 16099984 [2023-08-31 11:58:34,977 INFO L136 LiptonReduction]: Total number of compositions: 819 [2023-08-31 11:58:34,978 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 11:58:34,978 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;@3651a7b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 11:58:34,978 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 11:58:35,411 INFO L130 PetriNetUnfolder]: 31/1296 cut-off events. [2023-08-31 11:58:35,411 INFO L131 PetriNetUnfolder]: For 7106/7106 co-relation queries the response was YES. [2023-08-31 11:58:35,411 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 11:58:35,411 INFO L208 CegarLoopForPetriNet]: trace histogram [35, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 11:58:35,411 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 11:58:35,412 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 11:58:35,412 INFO L85 PathProgramCache]: Analyzing trace with hash -2020936206, now seen corresponding path program 1 times [2023-08-31 11:58:35,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 11:58:35,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932552742] [2023-08-31 11:58:35,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 11:58:35,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 11:58:35,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:58:35,459 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 11:58:35,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:58:35,497 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 11:58:35,498 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 11:58:35,498 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 11:58:35,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2023-08-31 11:58:35,498 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 11:58:35,498 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 11:58:35,498 WARN L233 ceAbstractionStarter]: 34 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 11:58:35,498 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 35 thread instances. [2023-08-31 11:58:35,595 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 11:58:35,601 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1741 places, 1741 transitions, 4847 flow [2023-08-31 11:58:36,879 INFO L130 PetriNetUnfolder]: 106/2159 cut-off events. [2023-08-31 11:58:36,880 INFO L131 PetriNetUnfolder]: For 7735/7735 co-relation queries the response was YES. [2023-08-31 11:58:36,971 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2895 conditions, 2159 events. 106/2159 cut-off events. For 7735/7735 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 10328 event pairs, 0 based on Foata normal form. 0/1492 useless extension candidates. Maximal degree in co-relation 2785. Up to 72 conditions per place. [2023-08-31 11:58:36,972 INFO L82 GeneralOperation]: Start removeDead. Operand has 1741 places, 1741 transitions, 4847 flow [2023-08-31 11:58:36,986 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1741 places, 1741 transitions, 4847 flow [2023-08-31 11:58:36,987 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 11:58:36,987 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1741 places, 1741 transitions, 4847 flow [2023-08-31 11:58:36,987 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1741 places, 1741 transitions, 4847 flow [2023-08-31 11:58:36,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1741 places, 1741 transitions, 4847 flow [2023-08-31 11:58:38,120 INFO L130 PetriNetUnfolder]: 106/2159 cut-off events. [2023-08-31 11:58:38,121 INFO L131 PetriNetUnfolder]: For 7735/7735 co-relation queries the response was YES. [2023-08-31 11:58:38,245 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2895 conditions, 2159 events. 106/2159 cut-off events. For 7735/7735 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 10328 event pairs, 0 based on Foata normal form. 0/1492 useless extension candidates. Maximal degree in co-relation 2785. Up to 72 conditions per place. [2023-08-31 11:58:38,806 INFO L119 LiptonReduction]: Number of co-enabled transitions 2842560 [2023-08-31 11:58:46,179 INFO L134 LiptonReduction]: Checked pairs total: 16926299 [2023-08-31 11:58:46,179 INFO L136 LiptonReduction]: Total number of compositions: 839 [2023-08-31 11:58:46,204 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 11:58:46,204 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;@3651a7b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 11:58:46,204 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 11:58:46,667 INFO L130 PetriNetUnfolder]: 32/1336 cut-off events. [2023-08-31 11:58:46,667 INFO L131 PetriNetUnfolder]: For 7735/7735 co-relation queries the response was YES. [2023-08-31 11:58:46,667 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 11:58:46,667 INFO L208 CegarLoopForPetriNet]: trace histogram [36, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 11:58:46,668 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 11:58:46,668 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 11:58:46,668 INFO L85 PathProgramCache]: Analyzing trace with hash -1574750139, now seen corresponding path program 1 times [2023-08-31 11:58:46,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 11:58:46,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645196812] [2023-08-31 11:58:46,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 11:58:46,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 11:58:46,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:58:46,704 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 11:58:46,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:58:46,740 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 11:58:46,741 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 11:58:46,741 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 11:58:46,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2023-08-31 11:58:46,741 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 11:58:46,741 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 11:58:46,741 WARN L233 ceAbstractionStarter]: 35 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 11:58:46,742 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 36 thread instances. [2023-08-31 11:58:46,837 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 11:58:46,843 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1790 places, 1790 transitions, 5020 flow [2023-08-31 11:58:48,068 INFO L130 PetriNetUnfolder]: 109/2220 cut-off events. [2023-08-31 11:58:48,068 INFO L131 PetriNetUnfolder]: For 8400/8400 co-relation queries the response was YES. [2023-08-31 11:58:48,202 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2995 conditions, 2220 events. 109/2220 cut-off events. For 8400/8400 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 10649 event pairs, 0 based on Foata normal form. 0/1534 useless extension candidates. Maximal degree in co-relation 2884. Up to 74 conditions per place. [2023-08-31 11:58:48,202 INFO L82 GeneralOperation]: Start removeDead. Operand has 1790 places, 1790 transitions, 5020 flow [2023-08-31 11:58:48,225 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1790 places, 1790 transitions, 5020 flow [2023-08-31 11:58:48,225 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 11:58:48,225 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1790 places, 1790 transitions, 5020 flow [2023-08-31 11:58:48,225 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1790 places, 1790 transitions, 5020 flow [2023-08-31 11:58:48,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1790 places, 1790 transitions, 5020 flow [2023-08-31 11:58:49,389 INFO L130 PetriNetUnfolder]: 109/2220 cut-off events. [2023-08-31 11:58:49,390 INFO L131 PetriNetUnfolder]: For 8400/8400 co-relation queries the response was YES. [2023-08-31 11:58:49,509 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2995 conditions, 2220 events. 109/2220 cut-off events. For 8400/8400 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 10649 event pairs, 0 based on Foata normal form. 0/1534 useless extension candidates. Maximal degree in co-relation 2884. Up to 74 conditions per place. [2023-08-31 11:58:50,060 INFO L119 LiptonReduction]: Number of co-enabled transitions 3008448 [2023-08-31 11:58:57,402 INFO L134 LiptonReduction]: Checked pairs total: 17953364 [2023-08-31 11:58:57,403 INFO L136 LiptonReduction]: Total number of compositions: 858 [2023-08-31 11:58:57,404 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 11:58:57,404 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;@3651a7b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 11:58:57,404 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 11:58:57,972 INFO L130 PetriNetUnfolder]: 33/1376 cut-off events. [2023-08-31 11:58:57,972 INFO L131 PetriNetUnfolder]: For 8400/8400 co-relation queries the response was YES. [2023-08-31 11:58:57,972 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 11:58:57,972 INFO L208 CegarLoopForPetriNet]: trace histogram [37, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 11:58:57,976 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 11:58:57,976 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 11:58:57,976 INFO L85 PathProgramCache]: Analyzing trace with hash -514228575, now seen corresponding path program 1 times [2023-08-31 11:58:57,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 11:58:57,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77224833] [2023-08-31 11:58:57,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 11:58:57,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 11:58:58,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:58:58,043 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 11:58:58,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:58:58,117 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 11:58:58,117 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 11:58:58,118 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 11:58:58,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2023-08-31 11:58:58,118 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 11:58:58,118 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 11:58:58,118 WARN L233 ceAbstractionStarter]: 36 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 11:58:58,118 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 37 thread instances. [2023-08-31 11:58:58,217 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 11:58:58,223 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1839 places, 1839 transitions, 5195 flow [2023-08-31 11:58:59,646 INFO L130 PetriNetUnfolder]: 112/2281 cut-off events. [2023-08-31 11:58:59,646 INFO L131 PetriNetUnfolder]: For 9102/9102 co-relation queries the response was YES. [2023-08-31 11:58:59,793 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3096 conditions, 2281 events. 112/2281 cut-off events. For 9102/9102 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 10916 event pairs, 0 based on Foata normal form. 0/1576 useless extension candidates. Maximal degree in co-relation 2984. Up to 76 conditions per place. [2023-08-31 11:58:59,793 INFO L82 GeneralOperation]: Start removeDead. Operand has 1839 places, 1839 transitions, 5195 flow [2023-08-31 11:58:59,820 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1839 places, 1839 transitions, 5195 flow [2023-08-31 11:58:59,820 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 11:58:59,820 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1839 places, 1839 transitions, 5195 flow [2023-08-31 11:58:59,820 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1839 places, 1839 transitions, 5195 flow [2023-08-31 11:58:59,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1839 places, 1839 transitions, 5195 flow [2023-08-31 11:59:01,127 INFO L130 PetriNetUnfolder]: 112/2281 cut-off events. [2023-08-31 11:59:01,128 INFO L131 PetriNetUnfolder]: For 9102/9102 co-relation queries the response was YES. [2023-08-31 11:59:01,246 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3096 conditions, 2281 events. 112/2281 cut-off events. For 9102/9102 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 10916 event pairs, 0 based on Foata normal form. 0/1576 useless extension candidates. Maximal degree in co-relation 2984. Up to 76 conditions per place. [2023-08-31 11:59:01,795 INFO L119 LiptonReduction]: Number of co-enabled transitions 3179040 [2023-08-31 11:59:09,515 INFO L134 LiptonReduction]: Checked pairs total: 18992995 [2023-08-31 11:59:09,515 INFO L136 LiptonReduction]: Total number of compositions: 883 [2023-08-31 11:59:09,516 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 11:59:09,516 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;@3651a7b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 11:59:09,517 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 11:59:10,125 INFO L130 PetriNetUnfolder]: 34/1416 cut-off events. [2023-08-31 11:59:10,125 INFO L131 PetriNetUnfolder]: For 9102/9102 co-relation queries the response was YES. [2023-08-31 11:59:10,125 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 11:59:10,125 INFO L208 CegarLoopForPetriNet]: trace histogram [38, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 11:59:10,125 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 11:59:10,126 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 11:59:10,126 INFO L85 PathProgramCache]: Analyzing trace with hash 1858225486, now seen corresponding path program 1 times [2023-08-31 11:59:10,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 11:59:10,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251271733] [2023-08-31 11:59:10,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 11:59:10,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 11:59:10,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:59:10,174 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 11:59:10,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:59:10,215 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 11:59:10,215 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 11:59:10,215 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 11:59:10,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2023-08-31 11:59:10,216 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 11:59:10,216 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 11:59:10,216 WARN L233 ceAbstractionStarter]: 37 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 11:59:10,216 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 38 thread instances. [2023-08-31 11:59:10,327 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 11:59:10,333 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1888 places, 1888 transitions, 5372 flow [2023-08-31 11:59:11,685 INFO L130 PetriNetUnfolder]: 115/2342 cut-off events. [2023-08-31 11:59:11,685 INFO L131 PetriNetUnfolder]: For 9842/9842 co-relation queries the response was YES. [2023-08-31 11:59:11,838 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3198 conditions, 2342 events. 115/2342 cut-off events. For 9842/9842 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 11215 event pairs, 0 based on Foata normal form. 0/1618 useless extension candidates. Maximal degree in co-relation 3085. Up to 78 conditions per place. [2023-08-31 11:59:11,838 INFO L82 GeneralOperation]: Start removeDead. Operand has 1888 places, 1888 transitions, 5372 flow [2023-08-31 11:59:11,862 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1888 places, 1888 transitions, 5372 flow [2023-08-31 11:59:11,863 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 11:59:11,863 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1888 places, 1888 transitions, 5372 flow [2023-08-31 11:59:11,864 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1888 places, 1888 transitions, 5372 flow [2023-08-31 11:59:11,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1888 places, 1888 transitions, 5372 flow [2023-08-31 11:59:13,170 INFO L130 PetriNetUnfolder]: 115/2342 cut-off events. [2023-08-31 11:59:13,171 INFO L131 PetriNetUnfolder]: For 9842/9842 co-relation queries the response was YES. [2023-08-31 11:59:13,297 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3198 conditions, 2342 events. 115/2342 cut-off events. For 9842/9842 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 11215 event pairs, 0 based on Foata normal form. 0/1618 useless extension candidates. Maximal degree in co-relation 3085. Up to 78 conditions per place. [2023-08-31 11:59:13,888 INFO L119 LiptonReduction]: Number of co-enabled transitions 3354336 [2023-08-31 11:59:22,880 INFO L134 LiptonReduction]: Checked pairs total: 17075440 [2023-08-31 11:59:22,880 INFO L136 LiptonReduction]: Total number of compositions: 912 [2023-08-31 11:59:22,882 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 11:59:22,882 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;@3651a7b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 11:59:22,882 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 11:59:23,469 INFO L130 PetriNetUnfolder]: 35/1456 cut-off events. [2023-08-31 11:59:23,469 INFO L131 PetriNetUnfolder]: For 9842/9842 co-relation queries the response was YES. [2023-08-31 11:59:23,469 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 11:59:23,469 INFO L208 CegarLoopForPetriNet]: trace histogram [39, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 11:59:23,469 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 11:59:23,470 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 11:59:23,470 INFO L85 PathProgramCache]: Analyzing trace with hash -1685825322, now seen corresponding path program 1 times [2023-08-31 11:59:23,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 11:59:23,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160215549] [2023-08-31 11:59:23,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 11:59:23,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 11:59:23,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:59:23,510 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 11:59:23,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:59:23,554 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 11:59:23,555 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 11:59:23,555 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 11:59:23,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2023-08-31 11:59:23,555 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 11:59:23,556 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 11:59:23,556 WARN L233 ceAbstractionStarter]: 38 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 11:59:23,556 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 39 thread instances. [2023-08-31 11:59:23,666 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 11:59:23,673 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1937 places, 1937 transitions, 5551 flow [2023-08-31 11:59:25,252 INFO L130 PetriNetUnfolder]: 118/2403 cut-off events. [2023-08-31 11:59:25,252 INFO L131 PetriNetUnfolder]: For 10621/10621 co-relation queries the response was YES. [2023-08-31 11:59:25,422 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3301 conditions, 2403 events. 118/2403 cut-off events. For 10621/10621 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 11565 event pairs, 0 based on Foata normal form. 0/1660 useless extension candidates. Maximal degree in co-relation 3187. Up to 80 conditions per place. [2023-08-31 11:59:25,422 INFO L82 GeneralOperation]: Start removeDead. Operand has 1937 places, 1937 transitions, 5551 flow [2023-08-31 11:59:25,450 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1937 places, 1937 transitions, 5551 flow [2023-08-31 11:59:25,451 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 11:59:25,451 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1937 places, 1937 transitions, 5551 flow [2023-08-31 11:59:25,451 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1937 places, 1937 transitions, 5551 flow [2023-08-31 11:59:25,451 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1937 places, 1937 transitions, 5551 flow [2023-08-31 11:59:26,903 INFO L130 PetriNetUnfolder]: 118/2403 cut-off events. [2023-08-31 11:59:26,904 INFO L131 PetriNetUnfolder]: For 10621/10621 co-relation queries the response was YES. [2023-08-31 11:59:27,064 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3301 conditions, 2403 events. 118/2403 cut-off events. For 10621/10621 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 11565 event pairs, 0 based on Foata normal form. 0/1660 useless extension candidates. Maximal degree in co-relation 3187. Up to 80 conditions per place. [2023-08-31 11:59:27,751 INFO L119 LiptonReduction]: Number of co-enabled transitions 3534336 [2023-08-31 11:59:36,800 INFO L134 LiptonReduction]: Checked pairs total: 21175606 [2023-08-31 11:59:36,800 INFO L136 LiptonReduction]: Total number of compositions: 925 [2023-08-31 11:59:36,802 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 11:59:36,803 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;@3651a7b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 11:59:36,803 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 11:59:37,384 INFO L130 PetriNetUnfolder]: 36/1496 cut-off events. [2023-08-31 11:59:37,385 INFO L131 PetriNetUnfolder]: For 10621/10621 co-relation queries the response was YES. [2023-08-31 11:59:37,385 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 11:59:37,385 INFO L208 CegarLoopForPetriNet]: trace histogram [40, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 11:59:37,385 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 11:59:37,385 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 11:59:37,385 INFO L85 PathProgramCache]: Analyzing trace with hash 908120616, now seen corresponding path program 1 times [2023-08-31 11:59:37,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 11:59:37,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152953093] [2023-08-31 11:59:37,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 11:59:37,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 11:59:37,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:59:37,458 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 11:59:37,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:59:37,540 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 11:59:37,541 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 11:59:37,541 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 11:59:37,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2023-08-31 11:59:37,541 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 11:59:37,542 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 11:59:37,542 WARN L233 ceAbstractionStarter]: 39 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 11:59:37,542 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 40 thread instances. [2023-08-31 11:59:37,655 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 11:59:37,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1986 places, 1986 transitions, 5732 flow [2023-08-31 11:59:39,297 INFO L130 PetriNetUnfolder]: 121/2464 cut-off events. [2023-08-31 11:59:39,298 INFO L131 PetriNetUnfolder]: For 11440/11440 co-relation queries the response was YES. [2023-08-31 11:59:39,427 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3405 conditions, 2464 events. 121/2464 cut-off events. For 11440/11440 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 11840 event pairs, 0 based on Foata normal form. 0/1702 useless extension candidates. Maximal degree in co-relation 3290. Up to 82 conditions per place. [2023-08-31 11:59:39,427 INFO L82 GeneralOperation]: Start removeDead. Operand has 1986 places, 1986 transitions, 5732 flow [2023-08-31 11:59:39,447 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1986 places, 1986 transitions, 5732 flow [2023-08-31 11:59:39,447 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 11:59:39,447 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1986 places, 1986 transitions, 5732 flow [2023-08-31 11:59:39,447 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1986 places, 1986 transitions, 5732 flow [2023-08-31 11:59:39,447 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1986 places, 1986 transitions, 5732 flow [2023-08-31 11:59:40,873 INFO L130 PetriNetUnfolder]: 121/2464 cut-off events. [2023-08-31 11:59:40,874 INFO L131 PetriNetUnfolder]: For 11440/11440 co-relation queries the response was YES. [2023-08-31 11:59:41,019 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3405 conditions, 2464 events. 121/2464 cut-off events. For 11440/11440 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 11840 event pairs, 0 based on Foata normal form. 0/1702 useless extension candidates. Maximal degree in co-relation 3290. Up to 82 conditions per place. [2023-08-31 11:59:41,668 INFO L119 LiptonReduction]: Number of co-enabled transitions 3719040 [2023-08-31 11:59:51,159 INFO L134 LiptonReduction]: Checked pairs total: 22190280 [2023-08-31 11:59:51,160 INFO L136 LiptonReduction]: Total number of compositions: 973 [2023-08-31 11:59:51,161 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 11:59:51,161 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;@3651a7b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 11:59:51,161 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 11:59:51,790 INFO L130 PetriNetUnfolder]: 37/1536 cut-off events. [2023-08-31 11:59:51,791 INFO L131 PetriNetUnfolder]: For 11440/11440 co-relation queries the response was YES. [2023-08-31 11:59:51,791 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 11:59:51,791 INFO L208 CegarLoopForPetriNet]: trace histogram [41, 40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 11:59:51,791 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 11:59:51,791 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 11:59:51,791 INFO L85 PathProgramCache]: Analyzing trace with hash -778595148, now seen corresponding path program 1 times [2023-08-31 11:59:51,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 11:59:51,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776411554] [2023-08-31 11:59:51,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 11:59:51,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 11:59:51,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:59:51,861 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 11:59:51,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:59:51,908 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 11:59:51,908 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 11:59:51,908 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 11:59:51,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2023-08-31 11:59:51,909 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 11:59:51,909 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 11:59:51,909 WARN L233 ceAbstractionStarter]: 40 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 11:59:51,909 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 41 thread instances. [2023-08-31 11:59:52,018 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 11:59:52,024 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2035 places, 2035 transitions, 5915 flow [2023-08-31 11:59:53,544 INFO L130 PetriNetUnfolder]: 124/2525 cut-off events. [2023-08-31 11:59:53,544 INFO L131 PetriNetUnfolder]: For 12300/12300 co-relation queries the response was YES. [2023-08-31 11:59:53,699 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3510 conditions, 2525 events. 124/2525 cut-off events. For 12300/12300 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 12143 event pairs, 0 based on Foata normal form. 0/1744 useless extension candidates. Maximal degree in co-relation 3394. Up to 84 conditions per place. [2023-08-31 11:59:53,700 INFO L82 GeneralOperation]: Start removeDead. Operand has 2035 places, 2035 transitions, 5915 flow [2023-08-31 11:59:53,724 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 2035 places, 2035 transitions, 5915 flow [2023-08-31 11:59:53,724 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 11:59:53,724 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 2035 places, 2035 transitions, 5915 flow [2023-08-31 11:59:53,725 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 2035 places, 2035 transitions, 5915 flow [2023-08-31 11:59:53,725 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2035 places, 2035 transitions, 5915 flow [2023-08-31 11:59:55,225 INFO L130 PetriNetUnfolder]: 124/2525 cut-off events. [2023-08-31 11:59:55,225 INFO L131 PetriNetUnfolder]: For 12300/12300 co-relation queries the response was YES. [2023-08-31 11:59:55,375 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3510 conditions, 2525 events. 124/2525 cut-off events. For 12300/12300 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 12143 event pairs, 0 based on Foata normal form. 0/1744 useless extension candidates. Maximal degree in co-relation 3394. Up to 84 conditions per place. [2023-08-31 11:59:56,055 INFO L119 LiptonReduction]: Number of co-enabled transitions 3908448 [2023-08-31 12:00:05,737 INFO L134 LiptonReduction]: Checked pairs total: 23429847 [2023-08-31 12:00:05,738 INFO L136 LiptonReduction]: Total number of compositions: 975 [2023-08-31 12:00:05,740 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 12:00:05,740 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;@3651a7b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 12:00:05,740 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 12:00:06,427 INFO L130 PetriNetUnfolder]: 38/1576 cut-off events. [2023-08-31 12:00:06,427 INFO L131 PetriNetUnfolder]: For 12300/12300 co-relation queries the response was YES. [2023-08-31 12:00:06,427 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 12:00:06,427 INFO L208 CegarLoopForPetriNet]: trace histogram [42, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 12:00:06,428 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 12:00:06,428 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 12:00:06,428 INFO L85 PathProgramCache]: Analyzing trace with hash 1937005364, now seen corresponding path program 1 times [2023-08-31 12:00:06,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 12:00:06,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033324587] [2023-08-31 12:00:06,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 12:00:06,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 12:00:06,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 12:00:06,476 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 12:00:06,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 12:00:06,531 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 12:00:06,532 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 12:00:06,532 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 12:00:06,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2023-08-31 12:00:06,532 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 12:00:06,532 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 12:00:06,532 WARN L233 ceAbstractionStarter]: 41 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 12:00:06,533 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 42 thread instances. [2023-08-31 12:00:06,771 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 12:00:06,778 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2084 places, 2084 transitions, 6100 flow [2023-08-31 12:00:08,633 INFO L130 PetriNetUnfolder]: 127/2586 cut-off events. [2023-08-31 12:00:08,633 INFO L131 PetriNetUnfolder]: For 13202/13202 co-relation queries the response was YES. [2023-08-31 12:00:08,832 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3616 conditions, 2586 events. 127/2586 cut-off events. For 13202/13202 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 12448 event pairs, 0 based on Foata normal form. 0/1786 useless extension candidates. Maximal degree in co-relation 3499. Up to 86 conditions per place. [2023-08-31 12:00:08,833 INFO L82 GeneralOperation]: Start removeDead. Operand has 2084 places, 2084 transitions, 6100 flow [2023-08-31 12:00:08,868 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 2084 places, 2084 transitions, 6100 flow [2023-08-31 12:00:08,868 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 12:00:08,869 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 2084 places, 2084 transitions, 6100 flow [2023-08-31 12:00:08,869 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 2084 places, 2084 transitions, 6100 flow [2023-08-31 12:00:08,869 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2084 places, 2084 transitions, 6100 flow [2023-08-31 12:00:10,742 INFO L130 PetriNetUnfolder]: 127/2586 cut-off events. [2023-08-31 12:00:10,742 INFO L131 PetriNetUnfolder]: For 13202/13202 co-relation queries the response was YES. [2023-08-31 12:00:10,885 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3616 conditions, 2586 events. 127/2586 cut-off events. For 13202/13202 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 12448 event pairs, 0 based on Foata normal form. 0/1786 useless extension candidates. Maximal degree in co-relation 3499. Up to 86 conditions per place. [2023-08-31 12:00:11,709 INFO L119 LiptonReduction]: Number of co-enabled transitions 4102560 [2023-08-31 12:00:23,465 INFO L134 LiptonReduction]: Checked pairs total: 24649121 [2023-08-31 12:00:23,465 INFO L136 LiptonReduction]: Total number of compositions: 1020 [2023-08-31 12:00:23,467 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 12:00:23,467 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;@3651a7b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 12:00:23,467 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 12:00:24,171 INFO L130 PetriNetUnfolder]: 39/1616 cut-off events. [2023-08-31 12:00:24,171 INFO L131 PetriNetUnfolder]: For 13202/13202 co-relation queries the response was YES. [2023-08-31 12:00:24,172 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 12:00:24,172 INFO L208 CegarLoopForPetriNet]: trace histogram [43, 42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 12:00:24,172 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 12:00:24,172 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 12:00:24,173 INFO L85 PathProgramCache]: Analyzing trace with hash 106729487, now seen corresponding path program 1 times [2023-08-31 12:00:24,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 12:00:24,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413298920] [2023-08-31 12:00:24,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 12:00:24,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 12:00:24,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 12:00:24,255 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 12:00:24,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 12:00:24,317 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 12:00:24,318 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 12:00:24,318 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 12:00:24,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2023-08-31 12:00:24,318 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 12:00:24,318 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 12:00:24,319 WARN L233 ceAbstractionStarter]: 42 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 12:00:24,319 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 43 thread instances. [2023-08-31 12:00:24,434 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 12:00:24,440 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2133 places, 2133 transitions, 6287 flow [2023-08-31 12:00:26,556 INFO L130 PetriNetUnfolder]: 130/2647 cut-off events. [2023-08-31 12:00:26,556 INFO L131 PetriNetUnfolder]: For 14147/14147 co-relation queries the response was YES. [2023-08-31 12:00:26,694 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3723 conditions, 2647 events. 130/2647 cut-off events. For 14147/14147 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 12729 event pairs, 0 based on Foata normal form. 0/1828 useless extension candidates. Maximal degree in co-relation 3605. Up to 88 conditions per place. [2023-08-31 12:00:26,694 INFO L82 GeneralOperation]: Start removeDead. Operand has 2133 places, 2133 transitions, 6287 flow [2023-08-31 12:00:26,718 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 2133 places, 2133 transitions, 6287 flow [2023-08-31 12:00:26,718 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 12:00:26,718 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 2133 places, 2133 transitions, 6287 flow [2023-08-31 12:00:26,718 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 2133 places, 2133 transitions, 6287 flow [2023-08-31 12:00:26,718 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2133 places, 2133 transitions, 6287 flow [2023-08-31 12:00:29,075 INFO L130 PetriNetUnfolder]: 130/2647 cut-off events. [2023-08-31 12:00:29,075 INFO L131 PetriNetUnfolder]: For 14147/14147 co-relation queries the response was YES. [2023-08-31 12:00:29,231 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3723 conditions, 2647 events. 130/2647 cut-off events. For 14147/14147 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 12729 event pairs, 0 based on Foata normal form. 0/1828 useless extension candidates. Maximal degree in co-relation 3605. Up to 88 conditions per place. [2023-08-31 12:00:30,035 INFO L119 LiptonReduction]: Number of co-enabled transitions 4301376 [2023-08-31 12:00:42,304 INFO L134 LiptonReduction]: Checked pairs total: 25843514 [2023-08-31 12:00:42,304 INFO L136 LiptonReduction]: Total number of compositions: 1039 [2023-08-31 12:00:42,307 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 12:00:42,307 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;@3651a7b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 12:00:42,307 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 12:00:43,292 INFO L130 PetriNetUnfolder]: 40/1656 cut-off events. [2023-08-31 12:00:43,293 INFO L131 PetriNetUnfolder]: For 14147/14147 co-relation queries the response was YES. [2023-08-31 12:00:43,293 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 12:00:43,293 INFO L208 CegarLoopForPetriNet]: trace histogram [44, 43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 12:00:43,293 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 12:00:43,293 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 12:00:43,293 INFO L85 PathProgramCache]: Analyzing trace with hash 406690286, now seen corresponding path program 1 times [2023-08-31 12:00:43,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 12:00:43,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503314888] [2023-08-31 12:00:43,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 12:00:43,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 12:00:43,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 12:00:43,387 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 12:00:43,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 12:00:43,454 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 12:00:43,455 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 12:00:43,455 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 12:00:43,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2023-08-31 12:00:43,455 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 12:00:43,456 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 12:00:43,456 WARN L233 ceAbstractionStarter]: 43 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 12:00:43,456 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 44 thread instances. [2023-08-31 12:00:43,587 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 12:00:43,595 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2182 places, 2182 transitions, 6476 flow [2023-08-31 12:00:45,831 INFO L130 PetriNetUnfolder]: 133/2708 cut-off events. [2023-08-31 12:00:45,831 INFO L131 PetriNetUnfolder]: For 15136/15136 co-relation queries the response was YES. [2023-08-31 12:00:46,001 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3831 conditions, 2708 events. 133/2708 cut-off events. For 15136/15136 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 13057 event pairs, 0 based on Foata normal form. 0/1870 useless extension candidates. Maximal degree in co-relation 3712. Up to 90 conditions per place. [2023-08-31 12:00:46,002 INFO L82 GeneralOperation]: Start removeDead. Operand has 2182 places, 2182 transitions, 6476 flow [2023-08-31 12:00:46,026 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 2182 places, 2182 transitions, 6476 flow [2023-08-31 12:00:46,026 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 12:00:46,026 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 2182 places, 2182 transitions, 6476 flow [2023-08-31 12:00:46,027 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 2182 places, 2182 transitions, 6476 flow [2023-08-31 12:00:46,027 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2182 places, 2182 transitions, 6476 flow [2023-08-31 12:00:48,110 INFO L130 PetriNetUnfolder]: 133/2708 cut-off events. [2023-08-31 12:00:48,111 INFO L131 PetriNetUnfolder]: For 15136/15136 co-relation queries the response was YES. [2023-08-31 12:00:48,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3831 conditions, 2708 events. 133/2708 cut-off events. For 15136/15136 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 13057 event pairs, 0 based on Foata normal form. 0/1870 useless extension candidates. Maximal degree in co-relation 3712. Up to 90 conditions per place. [2023-08-31 12:00:49,144 INFO L119 LiptonReduction]: Number of co-enabled transitions 4504896 [2023-08-31 12:01:00,497 INFO L134 LiptonReduction]: Checked pairs total: 27033555 [2023-08-31 12:01:00,497 INFO L136 LiptonReduction]: Total number of compositions: 1037 [2023-08-31 12:01:00,498 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 12:01:00,499 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;@3651a7b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 12:01:00,499 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 12:01:01,526 INFO L130 PetriNetUnfolder]: 41/1696 cut-off events. [2023-08-31 12:01:01,527 INFO L131 PetriNetUnfolder]: For 15136/15136 co-relation queries the response was YES. [2023-08-31 12:01:01,527 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 12:01:01,527 INFO L208 CegarLoopForPetriNet]: trace histogram [45, 44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 12:01:01,527 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 12:01:01,527 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 12:01:01,527 INFO L85 PathProgramCache]: Analyzing trace with hash 1989850690, now seen corresponding path program 1 times [2023-08-31 12:01:01,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 12:01:01,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426454867] [2023-08-31 12:01:01,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 12:01:01,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 12:01:01,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 12:01:01,587 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 12:01:01,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 12:01:01,645 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 12:01:01,646 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 12:01:01,646 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 12:01:01,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2023-08-31 12:01:01,646 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 12:01:01,646 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 12:01:01,647 WARN L233 ceAbstractionStarter]: 44 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 12:01:01,647 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 45 thread instances. [2023-08-31 12:01:01,781 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 12:01:01,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2231 places, 2231 transitions, 6667 flow [2023-08-31 12:01:04,076 INFO L130 PetriNetUnfolder]: 136/2769 cut-off events. [2023-08-31 12:01:04,076 INFO L131 PetriNetUnfolder]: For 16170/16170 co-relation queries the response was YES. [2023-08-31 12:01:04,251 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3940 conditions, 2769 events. 136/2769 cut-off events. For 16170/16170 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 13361 event pairs, 0 based on Foata normal form. 0/1912 useless extension candidates. Maximal degree in co-relation 3820. Up to 92 conditions per place. [2023-08-31 12:01:04,251 INFO L82 GeneralOperation]: Start removeDead. Operand has 2231 places, 2231 transitions, 6667 flow [2023-08-31 12:01:04,277 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 2231 places, 2231 transitions, 6667 flow [2023-08-31 12:01:04,277 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 12:01:04,277 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 2231 places, 2231 transitions, 6667 flow [2023-08-31 12:01:04,277 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 2231 places, 2231 transitions, 6667 flow [2023-08-31 12:01:04,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2231 places, 2231 transitions, 6667 flow [2023-08-31 12:01:06,546 INFO L130 PetriNetUnfolder]: 136/2769 cut-off events. [2023-08-31 12:01:06,547 INFO L131 PetriNetUnfolder]: For 16170/16170 co-relation queries the response was YES. [2023-08-31 12:01:06,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3940 conditions, 2769 events. 136/2769 cut-off events. For 16170/16170 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 13361 event pairs, 0 based on Foata normal form. 0/1912 useless extension candidates. Maximal degree in co-relation 3820. Up to 92 conditions per place. [2023-08-31 12:01:07,637 INFO L119 LiptonReduction]: Number of co-enabled transitions 4713120 [2023-08-31 12:01:21,222 INFO L134 LiptonReduction]: Checked pairs total: 28258363 [2023-08-31 12:01:21,224 INFO L136 LiptonReduction]: Total number of compositions: 1084 [2023-08-31 12:01:21,231 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 12:01:21,233 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;@3651a7b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 12:01:21,233 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 12:01:22,139 INFO L130 PetriNetUnfolder]: 42/1736 cut-off events. [2023-08-31 12:01:22,140 INFO L131 PetriNetUnfolder]: For 16170/16170 co-relation queries the response was YES. [2023-08-31 12:01:22,140 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 12:01:22,141 INFO L208 CegarLoopForPetriNet]: trace histogram [46, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 12:01:22,141 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 12:01:22,142 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 12:01:22,142 INFO L85 PathProgramCache]: Analyzing trace with hash 263643641, now seen corresponding path program 1 times [2023-08-31 12:01:22,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 12:01:22,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36232100] [2023-08-31 12:01:22,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 12:01:22,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 12:01:22,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 12:01:22,271 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 12:01:22,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 12:01:22,329 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 12:01:22,329 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 12:01:22,329 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 12:01:22,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2023-08-31 12:01:22,330 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 12:01:22,330 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 12:01:22,330 WARN L233 ceAbstractionStarter]: 45 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 12:01:22,330 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 46 thread instances. [2023-08-31 12:01:22,503 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 12:01:22,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2280 places, 2280 transitions, 6860 flow [2023-08-31 12:01:24,913 INFO L130 PetriNetUnfolder]: 139/2830 cut-off events. [2023-08-31 12:01:24,913 INFO L131 PetriNetUnfolder]: For 17250/17250 co-relation queries the response was YES. [2023-08-31 12:01:25,098 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4050 conditions, 2830 events. 139/2830 cut-off events. For 17250/17250 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 13657 event pairs, 0 based on Foata normal form. 0/1954 useless extension candidates. Maximal degree in co-relation 3929. Up to 94 conditions per place. [2023-08-31 12:01:25,099 INFO L82 GeneralOperation]: Start removeDead. Operand has 2280 places, 2280 transitions, 6860 flow [2023-08-31 12:01:25,123 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 2280 places, 2280 transitions, 6860 flow [2023-08-31 12:01:25,123 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 12:01:25,123 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 2280 places, 2280 transitions, 6860 flow [2023-08-31 12:01:25,123 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 2280 places, 2280 transitions, 6860 flow [2023-08-31 12:01:25,123 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2280 places, 2280 transitions, 6860 flow [2023-08-31 12:01:27,381 INFO L130 PetriNetUnfolder]: 139/2830 cut-off events. [2023-08-31 12:01:27,382 INFO L131 PetriNetUnfolder]: For 17250/17250 co-relation queries the response was YES. [2023-08-31 12:01:27,560 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4050 conditions, 2830 events. 139/2830 cut-off events. For 17250/17250 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 13657 event pairs, 0 based on Foata normal form. 0/1954 useless extension candidates. Maximal degree in co-relation 3929. Up to 94 conditions per place. [2023-08-31 12:01:28,520 INFO L119 LiptonReduction]: Number of co-enabled transitions 4926048 [2023-08-31 12:01:41,434 INFO L134 LiptonReduction]: Checked pairs total: 29573343 [2023-08-31 12:01:41,434 INFO L136 LiptonReduction]: Total number of compositions: 1095 [2023-08-31 12:01:41,435 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 12:01:41,436 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;@3651a7b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 12:01:41,436 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 12:01:42,375 INFO L130 PetriNetUnfolder]: 43/1776 cut-off events. [2023-08-31 12:01:42,376 INFO L131 PetriNetUnfolder]: For 17250/17250 co-relation queries the response was YES. [2023-08-31 12:01:42,376 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 12:01:42,376 INFO L208 CegarLoopForPetriNet]: trace histogram [47, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 12:01:42,376 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 12:01:42,376 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 12:01:42,377 INFO L85 PathProgramCache]: Analyzing trace with hash 1370630965, now seen corresponding path program 1 times [2023-08-31 12:01:42,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 12:01:42,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142496562] [2023-08-31 12:01:42,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 12:01:42,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 12:01:42,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 12:01:42,433 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 12:01:42,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 12:01:42,487 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 12:01:42,487 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 12:01:42,488 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 12:01:42,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2023-08-31 12:01:42,488 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 12:01:42,488 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 12:01:42,488 WARN L233 ceAbstractionStarter]: 46 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 12:01:42,488 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 47 thread instances. [2023-08-31 12:01:42,618 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 12:01:42,625 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2329 places, 2329 transitions, 7055 flow [2023-08-31 12:01:44,939 INFO L130 PetriNetUnfolder]: 142/2891 cut-off events. [2023-08-31 12:01:44,939 INFO L131 PetriNetUnfolder]: For 18377/18377 co-relation queries the response was YES. [2023-08-31 12:01:45,122 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4161 conditions, 2891 events. 142/2891 cut-off events. For 18377/18377 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 13931 event pairs, 0 based on Foata normal form. 0/1996 useless extension candidates. Maximal degree in co-relation 4039. Up to 96 conditions per place. [2023-08-31 12:01:45,122 INFO L82 GeneralOperation]: Start removeDead. Operand has 2329 places, 2329 transitions, 7055 flow [2023-08-31 12:01:45,148 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 2329 places, 2329 transitions, 7055 flow [2023-08-31 12:01:45,148 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 12:01:45,149 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 2329 places, 2329 transitions, 7055 flow [2023-08-31 12:01:45,149 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 2329 places, 2329 transitions, 7055 flow [2023-08-31 12:01:45,149 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2329 places, 2329 transitions, 7055 flow [2023-08-31 12:01:47,592 INFO L130 PetriNetUnfolder]: 142/2891 cut-off events. [2023-08-31 12:01:47,592 INFO L131 PetriNetUnfolder]: For 18377/18377 co-relation queries the response was YES. [2023-08-31 12:01:47,783 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4161 conditions, 2891 events. 142/2891 cut-off events. For 18377/18377 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 13931 event pairs, 0 based on Foata normal form. 0/1996 useless extension candidates. Maximal degree in co-relation 4039. Up to 96 conditions per place. [2023-08-31 12:01:48,913 INFO L119 LiptonReduction]: Number of co-enabled transitions 5143680 [2023-08-31 12:02:02,208 INFO L134 LiptonReduction]: Checked pairs total: 30868583 [2023-08-31 12:02:02,209 INFO L136 LiptonReduction]: Total number of compositions: 1128 [2023-08-31 12:02:02,210 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 12:02:02,210 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;@3651a7b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 12:02:02,210 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 12:02:03,205 INFO L130 PetriNetUnfolder]: 44/1816 cut-off events. [2023-08-31 12:02:03,205 INFO L131 PetriNetUnfolder]: For 18377/18377 co-relation queries the response was YES. [2023-08-31 12:02:03,205 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 12:02:03,205 INFO L208 CegarLoopForPetriNet]: trace histogram [48, 47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 12:02:03,206 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 12:02:03,206 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 12:02:03,206 INFO L85 PathProgramCache]: Analyzing trace with hash 1268793768, now seen corresponding path program 1 times [2023-08-31 12:02:03,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 12:02:03,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456337536] [2023-08-31 12:02:03,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 12:02:03,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 12:02:03,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 12:02:03,265 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 12:02:03,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 12:02:03,389 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 12:02:03,390 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 12:02:03,390 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 12:02:03,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2023-08-31 12:02:03,390 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 12:02:03,390 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 12:02:03,391 WARN L233 ceAbstractionStarter]: 47 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 12:02:03,391 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 48 thread instances. [2023-08-31 12:02:03,524 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 12:02:03,532 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2378 places, 2378 transitions, 7252 flow [2023-08-31 12:02:05,898 INFO L130 PetriNetUnfolder]: 145/2952 cut-off events. [2023-08-31 12:02:05,899 INFO L131 PetriNetUnfolder]: For 19552/19552 co-relation queries the response was YES. [2023-08-31 12:02:06,096 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4273 conditions, 2952 events. 145/2952 cut-off events. For 19552/19552 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 14240 event pairs, 0 based on Foata normal form. 0/2038 useless extension candidates. Maximal degree in co-relation 4150. Up to 98 conditions per place. [2023-08-31 12:02:06,097 INFO L82 GeneralOperation]: Start removeDead. Operand has 2378 places, 2378 transitions, 7252 flow [2023-08-31 12:02:06,124 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 2378 places, 2378 transitions, 7252 flow [2023-08-31 12:02:06,124 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 12:02:06,124 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 2378 places, 2378 transitions, 7252 flow [2023-08-31 12:02:06,124 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 2378 places, 2378 transitions, 7252 flow [2023-08-31 12:02:06,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2378 places, 2378 transitions, 7252 flow [2023-08-31 12:02:08,604 INFO L130 PetriNetUnfolder]: 145/2952 cut-off events. [2023-08-31 12:02:08,605 INFO L131 PetriNetUnfolder]: For 19552/19552 co-relation queries the response was YES. [2023-08-31 12:02:08,799 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4273 conditions, 2952 events. 145/2952 cut-off events. For 19552/19552 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 14240 event pairs, 0 based on Foata normal form. 0/2038 useless extension candidates. Maximal degree in co-relation 4150. Up to 98 conditions per place. [2023-08-31 12:02:09,791 INFO L119 LiptonReduction]: Number of co-enabled transitions 5366016 [2023-08-31 12:02:22,193 INFO L134 LiptonReduction]: Checked pairs total: 32103133 [2023-08-31 12:02:22,194 INFO L136 LiptonReduction]: Total number of compositions: 1150 [2023-08-31 12:02:22,197 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 12:02:22,197 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;@3651a7b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 12:02:22,197 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 12:02:23,355 INFO L130 PetriNetUnfolder]: 45/1856 cut-off events. [2023-08-31 12:02:23,357 INFO L131 PetriNetUnfolder]: For 19552/19552 co-relation queries the response was YES. [2023-08-31 12:02:23,357 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 12:02:23,358 INFO L208 CegarLoopForPetriNet]: trace histogram [49, 48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 12:02:23,358 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 12:02:23,358 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 12:02:23,358 INFO L85 PathProgramCache]: Analyzing trace with hash 1605364794, now seen corresponding path program 1 times [2023-08-31 12:02:23,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 12:02:23,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299678805] [2023-08-31 12:02:23,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 12:02:23,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 12:02:23,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 12:02:23,449 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 12:02:23,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 12:02:23,602 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 12:02:23,620 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 12:02:23,621 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 12:02:23,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2023-08-31 12:02:23,621 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 12:02:23,621 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 12:02:23,621 WARN L233 ceAbstractionStarter]: 48 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 12:02:23,622 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 49 thread instances. [2023-08-31 12:02:23,826 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 12:02:23,856 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2427 places, 2427 transitions, 7451 flow [2023-08-31 12:02:26,732 INFO L130 PetriNetUnfolder]: 148/3013 cut-off events. [2023-08-31 12:02:26,732 INFO L131 PetriNetUnfolder]: For 20776/20776 co-relation queries the response was YES. [2023-08-31 12:02:26,948 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4386 conditions, 3013 events. 148/3013 cut-off events. For 20776/20776 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 14556 event pairs, 0 based on Foata normal form. 0/2080 useless extension candidates. Maximal degree in co-relation 4262. Up to 100 conditions per place. [2023-08-31 12:02:26,948 INFO L82 GeneralOperation]: Start removeDead. Operand has 2427 places, 2427 transitions, 7451 flow [2023-08-31 12:02:26,977 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 2427 places, 2427 transitions, 7451 flow [2023-08-31 12:02:26,977 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 12:02:26,977 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 2427 places, 2427 transitions, 7451 flow [2023-08-31 12:02:26,977 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 2427 places, 2427 transitions, 7451 flow [2023-08-31 12:02:26,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2427 places, 2427 transitions, 7451 flow [2023-08-31 12:02:29,798 INFO L130 PetriNetUnfolder]: 148/3013 cut-off events. [2023-08-31 12:02:29,798 INFO L131 PetriNetUnfolder]: For 20776/20776 co-relation queries the response was YES. [2023-08-31 12:02:30,022 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4386 conditions, 3013 events. 148/3013 cut-off events. For 20776/20776 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 14556 event pairs, 0 based on Foata normal form. 0/2080 useless extension candidates. Maximal degree in co-relation 4262. Up to 100 conditions per place. [2023-08-31 12:02:31,359 INFO L119 LiptonReduction]: Number of co-enabled transitions 5593056 [2023-08-31 12:02:44,956 INFO L134 LiptonReduction]: Checked pairs total: 33588778 [2023-08-31 12:02:44,957 INFO L136 LiptonReduction]: Total number of compositions: 1180 [2023-08-31 12:02:44,958 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 12:02:44,958 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;@3651a7b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 12:02:44,958 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 12:02:46,078 INFO L130 PetriNetUnfolder]: 46/1896 cut-off events. [2023-08-31 12:02:46,078 INFO L131 PetriNetUnfolder]: For 20776/20776 co-relation queries the response was YES. [2023-08-31 12:02:46,078 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 12:02:46,078 INFO L208 CegarLoopForPetriNet]: trace histogram [50, 49, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 12:02:46,079 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 12:02:46,079 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 12:02:46,079 INFO L85 PathProgramCache]: Analyzing trace with hash 1334308765, now seen corresponding path program 1 times [2023-08-31 12:02:46,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 12:02:46,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132036032] [2023-08-31 12:02:46,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 12:02:46,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 12:02:46,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 12:02:46,144 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 12:02:46,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 12:02:46,240 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 12:02:46,241 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 12:02:46,241 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 12:02:46,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2023-08-31 12:02:46,241 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 12:02:46,242 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 12:02:46,242 WARN L233 ceAbstractionStarter]: 49 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 12:02:46,256 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 50 thread instances. [2023-08-31 12:02:46,414 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 12:02:46,422 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2476 places, 2476 transitions, 7652 flow [2023-08-31 12:02:49,083 INFO L130 PetriNetUnfolder]: 151/3074 cut-off events. [2023-08-31 12:02:49,084 INFO L131 PetriNetUnfolder]: For 22050/22050 co-relation queries the response was YES. [2023-08-31 12:02:49,287 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4500 conditions, 3074 events. 151/3074 cut-off events. For 22050/22050 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 14898 event pairs, 0 based on Foata normal form. 0/2122 useless extension candidates. Maximal degree in co-relation 4375. Up to 102 conditions per place. [2023-08-31 12:02:49,287 INFO L82 GeneralOperation]: Start removeDead. Operand has 2476 places, 2476 transitions, 7652 flow [2023-08-31 12:02:49,315 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 2476 places, 2476 transitions, 7652 flow [2023-08-31 12:02:49,315 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 12:02:49,315 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 2476 places, 2476 transitions, 7652 flow [2023-08-31 12:02:49,315 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 2476 places, 2476 transitions, 7652 flow [2023-08-31 12:02:49,316 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2476 places, 2476 transitions, 7652 flow [2023-08-31 12:02:51,981 INFO L130 PetriNetUnfolder]: 151/3074 cut-off events. [2023-08-31 12:02:51,981 INFO L131 PetriNetUnfolder]: For 22050/22050 co-relation queries the response was YES. [2023-08-31 12:02:52,214 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4500 conditions, 3074 events. 151/3074 cut-off events. For 22050/22050 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 14898 event pairs, 0 based on Foata normal form. 0/2122 useless extension candidates. Maximal degree in co-relation 4375. Up to 102 conditions per place. [2023-08-31 12:02:53,329 INFO L119 LiptonReduction]: Number of co-enabled transitions 5824800 [2023-08-31 12:03:07,969 INFO L134 LiptonReduction]: Checked pairs total: 34982256 [2023-08-31 12:03:07,970 INFO L136 LiptonReduction]: Total number of compositions: 1182 [2023-08-31 12:03:07,971 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 12:03:07,971 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;@3651a7b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 12:03:07,972 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 12:03:09,120 INFO L130 PetriNetUnfolder]: 47/1936 cut-off events. [2023-08-31 12:03:09,120 INFO L131 PetriNetUnfolder]: For 22050/22050 co-relation queries the response was YES. [2023-08-31 12:03:09,120 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 12:03:09,121 INFO L208 CegarLoopForPetriNet]: trace histogram [51, 50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 12:03:09,121 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 12:03:09,121 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 12:03:09,121 INFO L85 PathProgramCache]: Analyzing trace with hash 259514761, now seen corresponding path program 1 times [2023-08-31 12:03:09,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 12:03:09,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939034832] [2023-08-31 12:03:09,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 12:03:09,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 12:03:09,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 12:03:09,220 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 12:03:09,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 12:03:09,287 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 12:03:09,287 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 12:03:09,287 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 12:03:09,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2023-08-31 12:03:09,287 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 12:03:09,288 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 12:03:09,288 WARN L233 ceAbstractionStarter]: 50 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 12:03:09,288 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 51 thread instances. [2023-08-31 12:03:09,425 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 12:03:09,434 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2525 places, 2525 transitions, 7855 flow [2023-08-31 12:03:12,270 INFO L130 PetriNetUnfolder]: 154/3135 cut-off events. [2023-08-31 12:03:12,270 INFO L131 PetriNetUnfolder]: For 23375/23375 co-relation queries the response was YES. [2023-08-31 12:03:12,489 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4615 conditions, 3135 events. 154/3135 cut-off events. For 23375/23375 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 15195 event pairs, 0 based on Foata normal form. 0/2164 useless extension candidates. Maximal degree in co-relation 4489. Up to 104 conditions per place. [2023-08-31 12:03:12,489 INFO L82 GeneralOperation]: Start removeDead. Operand has 2525 places, 2525 transitions, 7855 flow [2023-08-31 12:03:12,518 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 2525 places, 2525 transitions, 7855 flow [2023-08-31 12:03:12,519 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 12:03:12,519 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 2525 places, 2525 transitions, 7855 flow [2023-08-31 12:03:12,519 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 2525 places, 2525 transitions, 7855 flow [2023-08-31 12:03:12,519 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2525 places, 2525 transitions, 7855 flow [2023-08-31 12:03:15,396 INFO L130 PetriNetUnfolder]: 154/3135 cut-off events. [2023-08-31 12:03:15,396 INFO L131 PetriNetUnfolder]: For 23375/23375 co-relation queries the response was YES. [2023-08-31 12:03:15,607 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4615 conditions, 3135 events. 154/3135 cut-off events. For 23375/23375 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 15195 event pairs, 0 based on Foata normal form. 0/2164 useless extension candidates. Maximal degree in co-relation 4489. Up to 104 conditions per place. [2023-08-31 12:03:16,777 INFO L119 LiptonReduction]: Number of co-enabled transitions 6061248 [2023-08-31 12:03:32,520 INFO L134 LiptonReduction]: Checked pairs total: 36448151 [2023-08-31 12:03:32,520 INFO L136 LiptonReduction]: Total number of compositions: 1230 [2023-08-31 12:03:32,521 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 12:03:32,521 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;@3651a7b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 12:03:32,522 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 12:03:33,852 INFO L130 PetriNetUnfolder]: 48/1976 cut-off events. [2023-08-31 12:03:33,852 INFO L131 PetriNetUnfolder]: For 23375/23375 co-relation queries the response was YES. [2023-08-31 12:03:33,852 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 12:03:33,853 INFO L208 CegarLoopForPetriNet]: trace histogram [52, 51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 12:03:33,853 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 12:03:33,853 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 12:03:33,853 INFO L85 PathProgramCache]: Analyzing trace with hash -1434001733, now seen corresponding path program 1 times [2023-08-31 12:03:33,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 12:03:33,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292324282] [2023-08-31 12:03:33,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 12:03:33,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 12:03:34,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 12:03:34,018 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 12:03:34,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 12:03:34,092 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 12:03:34,093 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 12:03:34,093 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 12:03:34,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2023-08-31 12:03:34,093 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 12:03:34,093 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 12:03:34,093 WARN L233 ceAbstractionStarter]: 51 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 12:03:34,093 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 52 thread instances. [2023-08-31 12:03:34,252 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 12:03:34,261 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2574 places, 2574 transitions, 8060 flow [2023-08-31 12:03:37,328 INFO L130 PetriNetUnfolder]: 157/3196 cut-off events. [2023-08-31 12:03:37,329 INFO L131 PetriNetUnfolder]: For 24752/24752 co-relation queries the response was YES. [2023-08-31 12:03:37,576 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4731 conditions, 3196 events. 157/3196 cut-off events. For 24752/24752 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 15482 event pairs, 0 based on Foata normal form. 0/2206 useless extension candidates. Maximal degree in co-relation 4604. Up to 106 conditions per place. [2023-08-31 12:03:37,576 INFO L82 GeneralOperation]: Start removeDead. Operand has 2574 places, 2574 transitions, 8060 flow [2023-08-31 12:03:37,610 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 2574 places, 2574 transitions, 8060 flow [2023-08-31 12:03:37,610 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 12:03:37,610 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 2574 places, 2574 transitions, 8060 flow [2023-08-31 12:03:37,611 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 2574 places, 2574 transitions, 8060 flow [2023-08-31 12:03:37,611 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2574 places, 2574 transitions, 8060 flow [2023-08-31 12:03:40,596 INFO L130 PetriNetUnfolder]: 157/3196 cut-off events. [2023-08-31 12:03:40,597 INFO L131 PetriNetUnfolder]: For 24752/24752 co-relation queries the response was YES. [2023-08-31 12:03:40,833 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4731 conditions, 3196 events. 157/3196 cut-off events. For 24752/24752 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 15482 event pairs, 0 based on Foata normal form. 0/2206 useless extension candidates. Maximal degree in co-relation 4604. Up to 106 conditions per place. [2023-08-31 12:03:42,021 INFO L119 LiptonReduction]: Number of co-enabled transitions 6302400 [2023-08-31 12:03:57,426 INFO L134 LiptonReduction]: Checked pairs total: 37916284 [2023-08-31 12:03:57,426 INFO L136 LiptonReduction]: Total number of compositions: 1242 [2023-08-31 12:03:57,428 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 12:03:57,428 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;@3651a7b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 12:03:57,428 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 12:03:58,855 INFO L130 PetriNetUnfolder]: 49/2016 cut-off events. [2023-08-31 12:03:58,855 INFO L131 PetriNetUnfolder]: For 24752/24752 co-relation queries the response was YES. [2023-08-31 12:03:58,855 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 12:03:58,856 INFO L208 CegarLoopForPetriNet]: trace histogram [53, 52, 52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 12:03:58,856 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 12:03:58,856 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 12:03:58,856 INFO L85 PathProgramCache]: Analyzing trace with hash 1537247544, now seen corresponding path program 1 times [2023-08-31 12:03:58,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 12:03:58,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407025495] [2023-08-31 12:03:58,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 12:03:58,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 12:03:58,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 12:03:58,924 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 12:03:58,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 12:03:59,003 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 12:03:59,004 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 12:03:59,004 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 12:03:59,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2023-08-31 12:03:59,004 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 12:03:59,004 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 12:03:59,004 WARN L233 ceAbstractionStarter]: 52 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 12:03:59,004 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 53 thread instances. [2023-08-31 12:03:59,144 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 12:03:59,153 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2623 places, 2623 transitions, 8267 flow [2023-08-31 12:04:02,460 INFO L130 PetriNetUnfolder]: 160/3257 cut-off events. [2023-08-31 12:04:02,460 INFO L131 PetriNetUnfolder]: For 26182/26182 co-relation queries the response was YES. [2023-08-31 12:04:02,707 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4848 conditions, 3257 events. 160/3257 cut-off events. For 26182/26182 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 15737 event pairs, 0 based on Foata normal form. 0/2248 useless extension candidates. Maximal degree in co-relation 4720. Up to 108 conditions per place. [2023-08-31 12:04:02,707 INFO L82 GeneralOperation]: Start removeDead. Operand has 2623 places, 2623 transitions, 8267 flow [2023-08-31 12:04:02,740 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 2623 places, 2623 transitions, 8267 flow [2023-08-31 12:04:02,740 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 12:04:02,741 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 2623 places, 2623 transitions, 8267 flow [2023-08-31 12:04:02,741 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 2623 places, 2623 transitions, 8267 flow [2023-08-31 12:04:02,741 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2623 places, 2623 transitions, 8267 flow [2023-08-31 12:04:06,382 INFO L130 PetriNetUnfolder]: 160/3257 cut-off events. [2023-08-31 12:04:06,382 INFO L131 PetriNetUnfolder]: For 26182/26182 co-relation queries the response was YES. [2023-08-31 12:04:06,628 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4848 conditions, 3257 events. 160/3257 cut-off events. For 26182/26182 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 15737 event pairs, 0 based on Foata normal form. 0/2248 useless extension candidates. Maximal degree in co-relation 4720. Up to 108 conditions per place. [2023-08-31 12:04:07,868 INFO L119 LiptonReduction]: Number of co-enabled transitions 6548256 [2023-08-31 12:04:23,963 INFO L134 LiptonReduction]: Checked pairs total: 39456295 [2023-08-31 12:04:23,963 INFO L136 LiptonReduction]: Total number of compositions: 1261 [2023-08-31 12:04:23,965 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 12:04:23,965 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;@3651a7b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 12:04:23,965 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 12:04:25,351 INFO L130 PetriNetUnfolder]: 50/2056 cut-off events. [2023-08-31 12:04:25,351 INFO L131 PetriNetUnfolder]: For 26182/26182 co-relation queries the response was YES. [2023-08-31 12:04:25,352 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 12:04:25,352 INFO L208 CegarLoopForPetriNet]: trace histogram [54, 53, 53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 12:04:25,352 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 12:04:25,352 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 12:04:25,352 INFO L85 PathProgramCache]: Analyzing trace with hash -1966815881, now seen corresponding path program 1 times [2023-08-31 12:04:25,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 12:04:25,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430836939] [2023-08-31 12:04:25,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 12:04:25,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 12:04:25,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 12:04:25,432 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 12:04:25,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 12:04:25,521 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 12:04:25,521 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 12:04:25,522 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 12:04:25,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2023-08-31 12:04:25,522 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 12:04:25,522 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 12:04:25,522 WARN L233 ceAbstractionStarter]: 53 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 12:04:25,522 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 54 thread instances. [2023-08-31 12:04:25,713 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 12:04:25,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2672 places, 2672 transitions, 8476 flow [2023-08-31 12:04:28,957 INFO L130 PetriNetUnfolder]: 163/3318 cut-off events. [2023-08-31 12:04:28,957 INFO L131 PetriNetUnfolder]: For 27666/27666 co-relation queries the response was YES. [2023-08-31 12:04:29,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4966 conditions, 3318 events. 163/3318 cut-off events. For 27666/27666 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 16103 event pairs, 0 based on Foata normal form. 0/2290 useless extension candidates. Maximal degree in co-relation 4837. Up to 110 conditions per place. [2023-08-31 12:04:29,211 INFO L82 GeneralOperation]: Start removeDead. Operand has 2672 places, 2672 transitions, 8476 flow [2023-08-31 12:04:29,245 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 2672 places, 2672 transitions, 8476 flow [2023-08-31 12:04:29,245 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 12:04:29,245 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 2672 places, 2672 transitions, 8476 flow [2023-08-31 12:04:29,246 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 2672 places, 2672 transitions, 8476 flow [2023-08-31 12:04:29,246 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2672 places, 2672 transitions, 8476 flow [2023-08-31 12:04:32,535 INFO L130 PetriNetUnfolder]: 163/3318 cut-off events. [2023-08-31 12:04:32,535 INFO L131 PetriNetUnfolder]: For 27666/27666 co-relation queries the response was YES. [2023-08-31 12:04:32,789 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4966 conditions, 3318 events. 163/3318 cut-off events. For 27666/27666 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 16103 event pairs, 0 based on Foata normal form. 0/2290 useless extension candidates. Maximal degree in co-relation 4837. Up to 110 conditions per place. [2023-08-31 12:04:34,098 INFO L119 LiptonReduction]: Number of co-enabled transitions 6798816 [2023-08-31 12:04:50,996 INFO L134 LiptonReduction]: Checked pairs total: 40905947 [2023-08-31 12:04:50,996 INFO L136 LiptonReduction]: Total number of compositions: 1290 [2023-08-31 12:04:50,997 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 12:04:50,998 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;@3651a7b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 12:04:50,998 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 12:04:52,613 INFO L130 PetriNetUnfolder]: 51/2096 cut-off events. [2023-08-31 12:04:52,614 INFO L131 PetriNetUnfolder]: For 27666/27666 co-relation queries the response was YES. [2023-08-31 12:04:52,614 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 12:04:52,614 INFO L208 CegarLoopForPetriNet]: trace histogram [55, 54, 54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 12:04:52,614 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 12:04:52,615 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 12:04:52,615 INFO L85 PathProgramCache]: Analyzing trace with hash 455940228, now seen corresponding path program 1 times [2023-08-31 12:04:52,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 12:04:52,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912726596] [2023-08-31 12:04:52,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 12:04:52,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 12:04:52,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 12:04:52,692 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 12:04:52,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 12:04:52,777 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 12:04:52,777 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 12:04:52,777 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 12:04:52,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2023-08-31 12:04:52,778 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 12:04:52,778 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 12:04:52,778 WARN L233 ceAbstractionStarter]: 54 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 12:04:52,778 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 55 thread instances. [2023-08-31 12:04:52,930 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 12:04:52,939 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2721 places, 2721 transitions, 8687 flow [2023-08-31 12:04:56,475 INFO L130 PetriNetUnfolder]: 166/3379 cut-off events. [2023-08-31 12:04:56,475 INFO L131 PetriNetUnfolder]: For 29205/29205 co-relation queries the response was YES. [2023-08-31 12:04:56,749 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5085 conditions, 3379 events. 166/3379 cut-off events. For 29205/29205 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 16394 event pairs, 0 based on Foata normal form. 0/2332 useless extension candidates. Maximal degree in co-relation 4955. Up to 112 conditions per place. [2023-08-31 12:04:56,749 INFO L82 GeneralOperation]: Start removeDead. Operand has 2721 places, 2721 transitions, 8687 flow [2023-08-31 12:04:56,785 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 2721 places, 2721 transitions, 8687 flow [2023-08-31 12:04:56,785 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 12:04:56,786 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 2721 places, 2721 transitions, 8687 flow [2023-08-31 12:04:56,786 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 2721 places, 2721 transitions, 8687 flow [2023-08-31 12:04:56,786 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2721 places, 2721 transitions, 8687 flow [2023-08-31 12:05:00,242 INFO L130 PetriNetUnfolder]: 166/3379 cut-off events. [2023-08-31 12:05:00,243 INFO L131 PetriNetUnfolder]: For 29205/29205 co-relation queries the response was YES. [2023-08-31 12:05:00,515 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5085 conditions, 3379 events. 166/3379 cut-off events. For 29205/29205 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 16394 event pairs, 0 based on Foata normal form. 0/2332 useless extension candidates. Maximal degree in co-relation 4955. Up to 112 conditions per place. [2023-08-31 12:05:01,923 INFO L119 LiptonReduction]: Number of co-enabled transitions 7054080 [2023-08-31 12:05:20,330 INFO L134 LiptonReduction]: Checked pairs total: 42370640 [2023-08-31 12:05:20,331 INFO L136 LiptonReduction]: Total number of compositions: 1309 [2023-08-31 12:05:20,332 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 12:05:20,332 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;@3651a7b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 12:05:20,332 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 12:05:21,921 INFO L130 PetriNetUnfolder]: 52/2136 cut-off events. [2023-08-31 12:05:21,922 INFO L131 PetriNetUnfolder]: For 29205/29205 co-relation queries the response was YES. [2023-08-31 12:05:21,922 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 12:05:21,922 INFO L208 CegarLoopForPetriNet]: trace histogram [56, 55, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 12:05:21,922 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 12:05:21,923 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 12:05:21,923 INFO L85 PathProgramCache]: Analyzing trace with hash -896731259, now seen corresponding path program 1 times [2023-08-31 12:05:21,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 12:05:21,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343311046] [2023-08-31 12:05:21,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 12:05:21,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 12:05:22,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 12:05:22,012 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 12:05:22,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 12:05:22,095 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 12:05:22,096 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 12:05:22,096 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 12:05:22,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2023-08-31 12:05:22,096 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 12:05:22,097 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 12:05:22,097 WARN L233 ceAbstractionStarter]: 55 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 12:05:22,097 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 56 thread instances. [2023-08-31 12:05:22,256 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 12:05:22,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2770 places, 2770 transitions, 8900 flow [2023-08-31 12:05:25,635 INFO L130 PetriNetUnfolder]: 169/3440 cut-off events. [2023-08-31 12:05:25,635 INFO L131 PetriNetUnfolder]: For 30800/30800 co-relation queries the response was YES. [2023-08-31 12:05:25,925 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5205 conditions, 3440 events. 169/3440 cut-off events. For 30800/30800 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 16682 event pairs, 0 based on Foata normal form. 0/2374 useless extension candidates. Maximal degree in co-relation 5074. Up to 114 conditions per place. [2023-08-31 12:05:25,926 INFO L82 GeneralOperation]: Start removeDead. Operand has 2770 places, 2770 transitions, 8900 flow [2023-08-31 12:05:26,130 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 2770 places, 2770 transitions, 8900 flow [2023-08-31 12:05:26,131 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 12:05:26,131 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 2770 places, 2770 transitions, 8900 flow [2023-08-31 12:05:26,131 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 2770 places, 2770 transitions, 8900 flow [2023-08-31 12:05:26,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2770 places, 2770 transitions, 8900 flow