./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/no-data-race.prp --file ../../../trunk/examples/svcomp/pthread-ext/11_fmaxsymopt.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/11_fmaxsymopt.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 963498115a8eca6e92c68ab7fa8168826446f05b9b398350c3ee0745adf1bb45 --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 11:29:01,556 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-31 11:29:01,558 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-31 11:29:01,598 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-31 11:29:01,599 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-31 11:29:01,602 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-31 11:29:01,603 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-31 11:29:01,606 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-31 11:29:01,607 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-31 11:29:01,612 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-31 11:29:01,612 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-31 11:29:01,615 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-31 11:29:01,615 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-31 11:29:01,617 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-31 11:29:01,618 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-31 11:29:01,622 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-31 11:29:01,623 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-31 11:29:01,625 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-31 11:29:01,626 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-31 11:29:01,632 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-31 11:29:01,633 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-31 11:29:01,634 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-31 11:29:01,641 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-31 11:29:01,642 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-31 11:29:01,648 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-31 11:29:01,648 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-31 11:29:01,649 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-31 11:29:01,651 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-31 11:29:01,651 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-31 11:29:01,652 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-31 11:29:01,653 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-31 11:29:01,654 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-31 11:29:01,655 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-31 11:29:01,655 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-31 11:29:01,656 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-31 11:29:01,657 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-31 11:29:01,657 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-31 11:29:01,657 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-31 11:29:01,658 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-31 11:29:01,658 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-31 11:29:01,659 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-31 11:29:01,660 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DataRace-32bit-Automizer_Default.epf [2023-08-31 11:29:01,693 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-31 11:29:01,694 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-31 11:29:01,695 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-31 11:29:01,695 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-31 11:29:01,696 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-31 11:29:01,696 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-31 11:29:01,697 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-31 11:29:01,697 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-31 11:29:01,697 INFO L138 SettingsManager]: * Use SBE=true [2023-08-31 11:29:01,697 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-31 11:29:01,698 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-31 11:29:01,698 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-31 11:29:01,698 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-31 11:29:01,698 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-31 11:29:01,699 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-31 11:29:01,699 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-31 11:29:01,699 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-31 11:29:01,699 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-31 11:29:01,699 INFO L138 SettingsManager]: * Check absence of data races in concurrent programs=true [2023-08-31 11:29:01,700 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-31 11:29:01,700 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-31 11:29:01,700 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-31 11:29:01,700 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-31 11:29:01,700 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-31 11:29:01,700 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-31 11:29:01,701 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-31 11:29:01,701 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 11:29:01,701 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-31 11:29:01,701 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-31 11:29:01,701 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-31 11:29:01,702 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-31 11:29:01,702 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-31 11:29:01,702 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-31 11:29:01,702 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-31 11:29:01,702 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-31 11:29:01,703 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-31 11:29:01,703 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-31 11:29:01,703 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! data-race) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 963498115a8eca6e92c68ab7fa8168826446f05b9b398350c3ee0745adf1bb45 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-08-31 11:29:02,007 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-31 11:29:02,025 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-31 11:29:02,028 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-31 11:29:02,029 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-31 11:29:02,030 INFO L275 PluginConnector]: CDTParser initialized [2023-08-31 11:29:02,031 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/11_fmaxsymopt.i [2023-08-31 11:29:03,126 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-31 11:29:03,360 INFO L351 CDTParser]: Found 1 translation units. [2023-08-31 11:29:03,361 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/11_fmaxsymopt.i [2023-08-31 11:29:03,375 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/41ad53ef7/f26c4a78f267420899713c294ccde6a6/FLAGbc4269e84 [2023-08-31 11:29:03,395 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/41ad53ef7/f26c4a78f267420899713c294ccde6a6 [2023-08-31 11:29:03,407 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-31 11:29:03,409 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-31 11:29:03,410 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-31 11:29:03,410 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-31 11:29:03,413 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-31 11:29:03,413 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 11:29:03" (1/1) ... [2023-08-31 11:29:03,414 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@34b31df6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 11:29:03, skipping insertion in model container [2023-08-31 11:29:03,414 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 11:29:03" (1/1) ... [2023-08-31 11:29:03,420 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-31 11:29:03,467 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-31 11:29:03,787 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/11_fmaxsymopt.i[30540,30553] [2023-08-31 11:29:03,793 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 11:29:03,804 INFO L203 MainTranslator]: Completed pre-run [2023-08-31 11:29:03,847 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/11_fmaxsymopt.i[30540,30553] [2023-08-31 11:29:03,857 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 11:29:03,896 INFO L208 MainTranslator]: Completed translation [2023-08-31 11:29:03,897 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 11:29:03 WrapperNode [2023-08-31 11:29:03,897 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-31 11:29:03,898 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-31 11:29:03,898 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-31 11:29:03,898 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-31 11:29:03,904 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 11:29:03" (1/1) ... [2023-08-31 11:29:03,929 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 11:29:03" (1/1) ... [2023-08-31 11:29:03,962 INFO L138 Inliner]: procedures = 171, calls = 24, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 108 [2023-08-31 11:29:03,962 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-31 11:29:03,963 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-31 11:29:03,964 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-31 11:29:03,964 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-31 11:29:03,971 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 11:29:03" (1/1) ... [2023-08-31 11:29:03,971 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 11:29:03" (1/1) ... [2023-08-31 11:29:03,979 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 11:29:03" (1/1) ... [2023-08-31 11:29:03,980 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 11:29:03" (1/1) ... [2023-08-31 11:29:03,991 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 11:29:03" (1/1) ... [2023-08-31 11:29:04,000 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 11:29:03" (1/1) ... [2023-08-31 11:29:04,001 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 11:29:03" (1/1) ... [2023-08-31 11:29:04,006 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 11:29:03" (1/1) ... [2023-08-31 11:29:04,008 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-31 11:29:04,011 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-31 11:29:04,011 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-31 11:29:04,012 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-31 11:29:04,017 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 11:29:03" (1/1) ... [2023-08-31 11:29:04,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 11:29:04,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 11:29:04,050 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 11:29:04,072 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 11:29:04,085 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-31 11:29:04,085 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-08-31 11:29:04,085 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-08-31 11:29:04,085 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-31 11:29:04,086 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-31 11:29:04,086 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-31 11:29:04,086 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-31 11:29:04,086 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-31 11:29:04,086 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-31 11:29:04,086 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-31 11:29:04,087 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 11:29:04,183 INFO L236 CfgBuilder]: Building ICFG [2023-08-31 11:29:04,185 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-31 11:29:04,365 INFO L277 CfgBuilder]: Performing block encoding [2023-08-31 11:29:04,442 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-31 11:29:04,443 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-08-31 11:29:04,445 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 11:29:04 BoogieIcfgContainer [2023-08-31 11:29:04,445 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-31 11:29:04,446 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-31 11:29:04,447 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-31 11:29:04,449 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-31 11:29:04,449 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.08 11:29:03" (1/3) ... [2023-08-31 11:29:04,450 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f68934 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 11:29:04, skipping insertion in model container [2023-08-31 11:29:04,450 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 11:29:03" (2/3) ... [2023-08-31 11:29:04,450 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f68934 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 11:29:04, skipping insertion in model container [2023-08-31 11:29:04,450 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 11:29:04" (3/3) ... [2023-08-31 11:29:04,451 INFO L112 eAbstractionObserver]: Analyzing ICFG 11_fmaxsymopt.i [2023-08-31 11:29:04,458 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-31 11:29:04,465 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-31 11:29:04,465 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 8 error locations. [2023-08-31 11:29:04,466 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-31 11:29:04,585 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 11:29:04,627 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 93 places, 98 transitions, 201 flow [2023-08-31 11:29:04,699 INFO L130 PetriNetUnfolder]: 9/108 cut-off events. [2023-08-31 11:29:04,700 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-31 11:29:04,704 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113 conditions, 108 events. 9/108 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 147 event pairs, 0 based on Foata normal form. 0/89 useless extension candidates. Maximal degree in co-relation 76. Up to 4 conditions per place. [2023-08-31 11:29:04,705 INFO L82 GeneralOperation]: Start removeDead. Operand has 93 places, 98 transitions, 201 flow [2023-08-31 11:29:04,709 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 93 places, 98 transitions, 201 flow [2023-08-31 11:29:04,713 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 11:29:04,724 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 93 places, 98 transitions, 201 flow [2023-08-31 11:29:04,730 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 93 places, 98 transitions, 201 flow [2023-08-31 11:29:04,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 93 places, 98 transitions, 201 flow [2023-08-31 11:29:04,765 INFO L130 PetriNetUnfolder]: 9/108 cut-off events. [2023-08-31 11:29:04,766 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-31 11:29:04,768 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113 conditions, 108 events. 9/108 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 147 event pairs, 0 based on Foata normal form. 0/89 useless extension candidates. Maximal degree in co-relation 76. Up to 4 conditions per place. [2023-08-31 11:29:04,771 INFO L119 LiptonReduction]: Number of co-enabled transitions 1664 [2023-08-31 11:29:07,664 INFO L134 LiptonReduction]: Checked pairs total: 1488 [2023-08-31 11:29:07,665 INFO L136 LiptonReduction]: Total number of compositions: 108 [2023-08-31 11:29:07,675 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 11:29:07,679 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;@7eb31b6a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 11:29:07,680 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 11:29:07,684 INFO L130 PetriNetUnfolder]: 1/18 cut-off events. [2023-08-31 11:29:07,685 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-31 11:29:07,685 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 11:29:07,685 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-31 11:29:07,686 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 11:29:07,690 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 11:29:07,690 INFO L85 PathProgramCache]: Analyzing trace with hash 1985969043, now seen corresponding path program 1 times [2023-08-31 11:29:07,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 11:29:07,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790968504] [2023-08-31 11:29:07,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 11:29:07,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 11:29:07,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:29:07,788 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 11:29:07,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:29:07,818 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 11:29:07,820 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 11:29:07,820 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 11:29:07,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-31 11:29:07,822 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 11:29:07,824 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 11:29:07,825 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 11:29:07,825 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-31 11:29:07,855 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 11:29:07,859 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 153 places, 163 transitions, 338 flow [2023-08-31 11:29:07,890 INFO L130 PetriNetUnfolder]: 17/185 cut-off events. [2023-08-31 11:29:07,890 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-31 11:29:07,893 INFO L83 FinitePrefix]: Finished finitePrefix Result has 195 conditions, 185 events. 17/185 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 445 event pairs, 0 based on Foata normal form. 0/149 useless extension candidates. Maximal degree in co-relation 140. Up to 6 conditions per place. [2023-08-31 11:29:07,893 INFO L82 GeneralOperation]: Start removeDead. Operand has 153 places, 163 transitions, 338 flow [2023-08-31 11:29:07,895 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 153 places, 163 transitions, 338 flow [2023-08-31 11:29:07,895 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 11:29:07,895 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 153 places, 163 transitions, 338 flow [2023-08-31 11:29:07,896 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 153 places, 163 transitions, 338 flow [2023-08-31 11:29:07,896 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 153 places, 163 transitions, 338 flow [2023-08-31 11:29:07,942 INFO L130 PetriNetUnfolder]: 17/185 cut-off events. [2023-08-31 11:29:07,943 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-31 11:29:07,947 INFO L83 FinitePrefix]: Finished finitePrefix Result has 195 conditions, 185 events. 17/185 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 445 event pairs, 0 based on Foata normal form. 0/149 useless extension candidates. Maximal degree in co-relation 140. Up to 6 conditions per place. [2023-08-31 11:29:07,953 INFO L119 LiptonReduction]: Number of co-enabled transitions 11648 [2023-08-31 11:29:10,489 INFO L134 LiptonReduction]: Checked pairs total: 34647 [2023-08-31 11:29:10,489 INFO L136 LiptonReduction]: Total number of compositions: 133 [2023-08-31 11:29:10,491 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 11:29:10,492 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;@7eb31b6a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 11:29:10,492 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 11:29:10,497 INFO L130 PetriNetUnfolder]: 3/45 cut-off events. [2023-08-31 11:29:10,498 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-31 11:29:10,498 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 11:29:10,498 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-31 11:29:10,498 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 11:29:10,499 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 11:29:10,499 INFO L85 PathProgramCache]: Analyzing trace with hash -517469385, now seen corresponding path program 1 times [2023-08-31 11:29:10,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 11:29:10,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783758291] [2023-08-31 11:29:10,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 11:29:10,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 11:29:10,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:29:10,519 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 11:29:10,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:29:10,537 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 11:29:10,537 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 11:29:10,538 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 11:29:10,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-31 11:29:10,538 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 11:29:10,538 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 11:29:10,539 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 11:29:10,539 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-31 11:29:10,576 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 11:29:10,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 213 places, 228 transitions, 477 flow [2023-08-31 11:29:10,612 INFO L130 PetriNetUnfolder]: 25/262 cut-off events. [2023-08-31 11:29:10,612 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-31 11:29:10,615 INFO L83 FinitePrefix]: Finished finitePrefix Result has 278 conditions, 262 events. 25/262 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 816 event pairs, 0 based on Foata normal form. 0/209 useless extension candidates. Maximal degree in co-relation 204. Up to 8 conditions per place. [2023-08-31 11:29:10,615 INFO L82 GeneralOperation]: Start removeDead. Operand has 213 places, 228 transitions, 477 flow [2023-08-31 11:29:10,617 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 213 places, 228 transitions, 477 flow [2023-08-31 11:29:10,617 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 11:29:10,618 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 213 places, 228 transitions, 477 flow [2023-08-31 11:29:10,618 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 213 places, 228 transitions, 477 flow [2023-08-31 11:29:10,618 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 213 places, 228 transitions, 477 flow [2023-08-31 11:29:10,647 INFO L130 PetriNetUnfolder]: 25/262 cut-off events. [2023-08-31 11:29:10,647 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-31 11:29:10,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 278 conditions, 262 events. 25/262 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 816 event pairs, 0 based on Foata normal form. 0/209 useless extension candidates. Maximal degree in co-relation 204. Up to 8 conditions per place. [2023-08-31 11:29:10,663 INFO L119 LiptonReduction]: Number of co-enabled transitions 29952 [2023-08-31 11:29:13,902 INFO L134 LiptonReduction]: Checked pairs total: 94072 [2023-08-31 11:29:13,902 INFO L136 LiptonReduction]: Total number of compositions: 183 [2023-08-31 11:29:13,904 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 11:29:13,905 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;@7eb31b6a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 11:29:13,905 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 11:29:13,911 INFO L130 PetriNetUnfolder]: 7/79 cut-off events. [2023-08-31 11:29:13,912 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-31 11:29:13,912 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 11:29:13,912 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-08-31 11:29:13,912 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 11:29:13,913 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 11:29:13,913 INFO L85 PathProgramCache]: Analyzing trace with hash -498985217, now seen corresponding path program 1 times [2023-08-31 11:29:13,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 11:29:13,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501158329] [2023-08-31 11:29:13,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 11:29:13,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 11:29:13,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:29:13,932 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 11:29:13,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:29:13,949 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 11:29:13,949 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 11:29:13,949 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 11:29:13,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-31 11:29:13,950 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 11:29:13,950 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 11:29:13,950 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 11:29:13,951 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-08-31 11:29:13,978 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 11:29:13,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 273 places, 293 transitions, 618 flow [2023-08-31 11:29:14,026 INFO L130 PetriNetUnfolder]: 33/339 cut-off events. [2023-08-31 11:29:14,027 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-08-31 11:29:14,031 INFO L83 FinitePrefix]: Finished finitePrefix Result has 362 conditions, 339 events. 33/339 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1210 event pairs, 0 based on Foata normal form. 0/269 useless extension candidates. Maximal degree in co-relation 270. Up to 10 conditions per place. [2023-08-31 11:29:14,031 INFO L82 GeneralOperation]: Start removeDead. Operand has 273 places, 293 transitions, 618 flow [2023-08-31 11:29:14,033 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 273 places, 293 transitions, 618 flow [2023-08-31 11:29:14,033 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 11:29:14,034 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 273 places, 293 transitions, 618 flow [2023-08-31 11:29:14,034 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 273 places, 293 transitions, 618 flow [2023-08-31 11:29:14,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 273 places, 293 transitions, 618 flow [2023-08-31 11:29:14,087 INFO L130 PetriNetUnfolder]: 33/339 cut-off events. [2023-08-31 11:29:14,087 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-08-31 11:29:14,091 INFO L83 FinitePrefix]: Finished finitePrefix Result has 362 conditions, 339 events. 33/339 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1210 event pairs, 0 based on Foata normal form. 0/269 useless extension candidates. Maximal degree in co-relation 270. Up to 10 conditions per place. [2023-08-31 11:29:14,106 INFO L119 LiptonReduction]: Number of co-enabled transitions 56576 [2023-08-31 11:29:17,777 INFO L134 LiptonReduction]: Checked pairs total: 178683 [2023-08-31 11:29:17,785 INFO L136 LiptonReduction]: Total number of compositions: 229 [2023-08-31 11:29:17,786 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 11:29:17,787 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;@7eb31b6a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 11:29:17,787 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 11:29:17,799 INFO L130 PetriNetUnfolder]: 11/113 cut-off events. [2023-08-31 11:29:17,799 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-08-31 11:29:17,799 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 11:29:17,800 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2023-08-31 11:29:17,800 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 11:29:17,800 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 11:29:17,800 INFO L85 PathProgramCache]: Analyzing trace with hash -2033404755, now seen corresponding path program 1 times [2023-08-31 11:29:17,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 11:29:17,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456319212] [2023-08-31 11:29:17,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 11:29:17,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 11:29:17,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:29:17,850 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 11:29:17,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:29:17,910 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 11:29:17,911 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 11:29:17,911 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 11:29:17,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-31 11:29:17,912 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 11:29:17,913 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 11:29:17,913 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 11:29:17,913 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-08-31 11:29:17,946 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 11:29:17,958 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 333 places, 358 transitions, 761 flow [2023-08-31 11:29:18,019 INFO L130 PetriNetUnfolder]: 41/416 cut-off events. [2023-08-31 11:29:18,020 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-08-31 11:29:18,027 INFO L83 FinitePrefix]: Finished finitePrefix Result has 447 conditions, 416 events. 41/416 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1606 event pairs, 0 based on Foata normal form. 0/329 useless extension candidates. Maximal degree in co-relation 352. Up to 12 conditions per place. [2023-08-31 11:29:18,028 INFO L82 GeneralOperation]: Start removeDead. Operand has 333 places, 358 transitions, 761 flow [2023-08-31 11:29:18,032 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 333 places, 358 transitions, 761 flow [2023-08-31 11:29:18,032 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 11:29:18,032 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 333 places, 358 transitions, 761 flow [2023-08-31 11:29:18,033 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 333 places, 358 transitions, 761 flow [2023-08-31 11:29:18,033 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 333 places, 358 transitions, 761 flow [2023-08-31 11:29:18,108 INFO L130 PetriNetUnfolder]: 41/416 cut-off events. [2023-08-31 11:29:18,108 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-08-31 11:29:18,114 INFO L83 FinitePrefix]: Finished finitePrefix Result has 447 conditions, 416 events. 41/416 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1606 event pairs, 0 based on Foata normal form. 0/329 useless extension candidates. Maximal degree in co-relation 352. Up to 12 conditions per place. [2023-08-31 11:29:18,133 INFO L119 LiptonReduction]: Number of co-enabled transitions 91520 [2023-08-31 11:29:22,460 INFO L134 LiptonReduction]: Checked pairs total: 293870 [2023-08-31 11:29:22,461 INFO L136 LiptonReduction]: Total number of compositions: 288 [2023-08-31 11:29:22,463 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 11:29:22,463 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;@7eb31b6a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 11:29:22,464 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 11:29:22,478 INFO L130 PetriNetUnfolder]: 15/147 cut-off events. [2023-08-31 11:29:22,478 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-08-31 11:29:22,478 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 11:29:22,479 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 11:29:22,479 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 11:29:22,479 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 11:29:22,479 INFO L85 PathProgramCache]: Analyzing trace with hash -2045515712, now seen corresponding path program 1 times [2023-08-31 11:29:22,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 11:29:22,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038741712] [2023-08-31 11:29:22,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 11:29:22,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 11:29:22,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:29:22,506 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 11:29:22,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:29:22,554 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 11:29:22,555 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 11:29:22,557 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 11:29:22,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-31 11:29:22,557 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 11:29:22,558 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 11:29:22,561 WARN L233 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 11:29:22,561 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2023-08-31 11:29:22,604 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 11:29:22,617 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 393 places, 423 transitions, 906 flow [2023-08-31 11:29:22,710 INFO L130 PetriNetUnfolder]: 49/493 cut-off events. [2023-08-31 11:29:22,711 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2023-08-31 11:29:22,722 INFO L83 FinitePrefix]: Finished finitePrefix Result has 533 conditions, 493 events. 49/493 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2010 event pairs, 0 based on Foata normal form. 0/389 useless extension candidates. Maximal degree in co-relation 435. Up to 14 conditions per place. [2023-08-31 11:29:22,722 INFO L82 GeneralOperation]: Start removeDead. Operand has 393 places, 423 transitions, 906 flow [2023-08-31 11:29:22,727 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 393 places, 423 transitions, 906 flow [2023-08-31 11:29:22,727 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 11:29:22,731 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 393 places, 423 transitions, 906 flow [2023-08-31 11:29:22,731 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 393 places, 423 transitions, 906 flow [2023-08-31 11:29:22,732 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 393 places, 423 transitions, 906 flow [2023-08-31 11:29:22,813 INFO L130 PetriNetUnfolder]: 49/493 cut-off events. [2023-08-31 11:29:22,813 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2023-08-31 11:29:22,824 INFO L83 FinitePrefix]: Finished finitePrefix Result has 533 conditions, 493 events. 49/493 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2010 event pairs, 0 based on Foata normal form. 0/389 useless extension candidates. Maximal degree in co-relation 435. Up to 14 conditions per place. [2023-08-31 11:29:22,881 INFO L119 LiptonReduction]: Number of co-enabled transitions 134784 [2023-08-31 11:29:28,192 INFO L134 LiptonReduction]: Checked pairs total: 445496 [2023-08-31 11:29:28,193 INFO L136 LiptonReduction]: Total number of compositions: 345 [2023-08-31 11:29:28,194 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 11:29:28,195 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;@7eb31b6a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 11:29:28,195 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 11:29:28,221 INFO L130 PetriNetUnfolder]: 19/181 cut-off events. [2023-08-31 11:29:28,222 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2023-08-31 11:29:28,222 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 11:29:28,222 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 11:29:28,222 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 11:29:28,223 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 11:29:28,223 INFO L85 PathProgramCache]: Analyzing trace with hash 1228526452, now seen corresponding path program 1 times [2023-08-31 11:29:28,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 11:29:28,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882879320] [2023-08-31 11:29:28,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 11:29:28,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 11:29:28,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:29:28,239 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 11:29:28,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:29:28,256 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 11:29:28,257 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 11:29:28,257 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 11:29:28,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-31 11:29:28,257 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 11:29:28,258 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 11:29:28,258 WARN L233 ceAbstractionStarter]: 6 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 11:29:28,258 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 7 thread instances. [2023-08-31 11:29:28,297 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 11:29:28,302 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 453 places, 488 transitions, 1053 flow [2023-08-31 11:29:28,423 INFO L130 PetriNetUnfolder]: 57/570 cut-off events. [2023-08-31 11:29:28,423 INFO L131 PetriNetUnfolder]: For 77/77 co-relation queries the response was YES. [2023-08-31 11:29:28,436 INFO L83 FinitePrefix]: Finished finitePrefix Result has 620 conditions, 570 events. 57/570 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2397 event pairs, 0 based on Foata normal form. 0/449 useless extension candidates. Maximal degree in co-relation 519. Up to 16 conditions per place. [2023-08-31 11:29:28,437 INFO L82 GeneralOperation]: Start removeDead. Operand has 453 places, 488 transitions, 1053 flow [2023-08-31 11:29:28,446 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 453 places, 488 transitions, 1053 flow [2023-08-31 11:29:28,446 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 11:29:28,446 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 453 places, 488 transitions, 1053 flow [2023-08-31 11:29:28,447 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 453 places, 488 transitions, 1053 flow [2023-08-31 11:29:28,447 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 453 places, 488 transitions, 1053 flow [2023-08-31 11:29:28,591 INFO L130 PetriNetUnfolder]: 57/570 cut-off events. [2023-08-31 11:29:28,592 INFO L131 PetriNetUnfolder]: For 77/77 co-relation queries the response was YES. [2023-08-31 11:29:28,602 INFO L83 FinitePrefix]: Finished finitePrefix Result has 620 conditions, 570 events. 57/570 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2397 event pairs, 0 based on Foata normal form. 0/449 useless extension candidates. Maximal degree in co-relation 519. Up to 16 conditions per place. [2023-08-31 11:29:28,649 INFO L119 LiptonReduction]: Number of co-enabled transitions 186368 [2023-08-31 11:29:34,761 INFO L134 LiptonReduction]: Checked pairs total: 630410 [2023-08-31 11:29:34,761 INFO L136 LiptonReduction]: Total number of compositions: 404 [2023-08-31 11:29:34,763 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 11:29:34,763 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;@7eb31b6a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 11:29:34,763 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 11:29:34,784 INFO L130 PetriNetUnfolder]: 23/215 cut-off events. [2023-08-31 11:29:34,784 INFO L131 PetriNetUnfolder]: For 77/77 co-relation queries the response was YES. [2023-08-31 11:29:34,784 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 11:29:34,784 INFO L208 CegarLoopForPetriNet]: trace histogram [8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 11:29:34,785 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 11:29:34,785 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 11:29:34,785 INFO L85 PathProgramCache]: Analyzing trace with hash -1055923534, now seen corresponding path program 1 times [2023-08-31 11:29:34,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 11:29:34,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773955898] [2023-08-31 11:29:34,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 11:29:34,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 11:29:34,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:29:34,807 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 11:29:34,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:29:34,825 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 11:29:34,825 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 11:29:34,825 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 11:29:34,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-31 11:29:34,825 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 11:29:34,826 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 11:29:34,826 WARN L233 ceAbstractionStarter]: 7 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 11:29:34,826 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 8 thread instances. [2023-08-31 11:29:34,877 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 11:29:34,881 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 513 places, 553 transitions, 1202 flow [2023-08-31 11:29:35,033 INFO L130 PetriNetUnfolder]: 65/647 cut-off events. [2023-08-31 11:29:35,034 INFO L131 PetriNetUnfolder]: For 112/112 co-relation queries the response was YES. [2023-08-31 11:29:35,048 INFO L83 FinitePrefix]: Finished finitePrefix Result has 708 conditions, 647 events. 65/647 cut-off events. For 112/112 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2815 event pairs, 0 based on Foata normal form. 0/509 useless extension candidates. Maximal degree in co-relation 604. Up to 18 conditions per place. [2023-08-31 11:29:35,048 INFO L82 GeneralOperation]: Start removeDead. Operand has 513 places, 553 transitions, 1202 flow [2023-08-31 11:29:35,052 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 513 places, 553 transitions, 1202 flow [2023-08-31 11:29:35,052 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 11:29:35,053 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 513 places, 553 transitions, 1202 flow [2023-08-31 11:29:35,053 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 513 places, 553 transitions, 1202 flow [2023-08-31 11:29:35,053 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 513 places, 553 transitions, 1202 flow [2023-08-31 11:29:35,195 INFO L130 PetriNetUnfolder]: 65/647 cut-off events. [2023-08-31 11:29:35,195 INFO L131 PetriNetUnfolder]: For 112/112 co-relation queries the response was YES. [2023-08-31 11:29:35,206 INFO L83 FinitePrefix]: Finished finitePrefix Result has 708 conditions, 647 events. 65/647 cut-off events. For 112/112 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2815 event pairs, 0 based on Foata normal form. 0/509 useless extension candidates. Maximal degree in co-relation 604. Up to 18 conditions per place. [2023-08-31 11:29:35,256 INFO L119 LiptonReduction]: Number of co-enabled transitions 246272 [2023-08-31 11:29:41,493 INFO L134 LiptonReduction]: Checked pairs total: 819792 [2023-08-31 11:29:41,494 INFO L136 LiptonReduction]: Total number of compositions: 447 [2023-08-31 11:29:41,495 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 11:29:41,495 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;@7eb31b6a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 11:29:41,496 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 11:29:41,517 INFO L130 PetriNetUnfolder]: 27/249 cut-off events. [2023-08-31 11:29:41,517 INFO L131 PetriNetUnfolder]: For 112/112 co-relation queries the response was YES. [2023-08-31 11:29:41,517 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 11:29:41,517 INFO L208 CegarLoopForPetriNet]: trace histogram [9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 11:29:41,518 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 11:29:41,518 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 11:29:41,518 INFO L85 PathProgramCache]: Analyzing trace with hash -675841374, now seen corresponding path program 1 times [2023-08-31 11:29:41,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 11:29:41,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913154328] [2023-08-31 11:29:41,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 11:29:41,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 11:29:41,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:29:41,535 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 11:29:41,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:29:41,552 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 11:29:41,552 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 11:29:41,553 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 11:29:41,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-31 11:29:41,553 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 11:29:41,553 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 11:29:41,554 WARN L233 ceAbstractionStarter]: 8 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 11:29:41,554 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 9 thread instances. [2023-08-31 11:29:41,606 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 11:29:41,609 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 573 places, 618 transitions, 1353 flow [2023-08-31 11:29:41,766 INFO L130 PetriNetUnfolder]: 73/724 cut-off events. [2023-08-31 11:29:41,767 INFO L131 PetriNetUnfolder]: For 156/156 co-relation queries the response was YES. [2023-08-31 11:29:41,781 INFO L83 FinitePrefix]: Finished finitePrefix Result has 797 conditions, 724 events. 73/724 cut-off events. For 156/156 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 3188 event pairs, 0 based on Foata normal form. 0/569 useless extension candidates. Maximal degree in co-relation 690. Up to 20 conditions per place. [2023-08-31 11:29:41,781 INFO L82 GeneralOperation]: Start removeDead. Operand has 573 places, 618 transitions, 1353 flow [2023-08-31 11:29:41,787 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 573 places, 618 transitions, 1353 flow [2023-08-31 11:29:41,788 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 11:29:41,788 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 573 places, 618 transitions, 1353 flow [2023-08-31 11:29:41,788 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 573 places, 618 transitions, 1353 flow [2023-08-31 11:29:41,788 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 573 places, 618 transitions, 1353 flow [2023-08-31 11:29:41,941 INFO L130 PetriNetUnfolder]: 73/724 cut-off events. [2023-08-31 11:29:41,941 INFO L131 PetriNetUnfolder]: For 156/156 co-relation queries the response was YES. [2023-08-31 11:29:41,962 INFO L83 FinitePrefix]: Finished finitePrefix Result has 797 conditions, 724 events. 73/724 cut-off events. For 156/156 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 3188 event pairs, 0 based on Foata normal form. 0/569 useless extension candidates. Maximal degree in co-relation 690. Up to 20 conditions per place. [2023-08-31 11:29:42,042 INFO L119 LiptonReduction]: Number of co-enabled transitions 314496 [2023-08-31 11:29:49,493 INFO L134 LiptonReduction]: Checked pairs total: 1066079 [2023-08-31 11:29:49,493 INFO L136 LiptonReduction]: Total number of compositions: 507 [2023-08-31 11:29:49,497 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 11:29:49,499 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;@7eb31b6a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 11:29:49,499 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 11:29:49,527 INFO L130 PetriNetUnfolder]: 31/283 cut-off events. [2023-08-31 11:29:49,527 INFO L131 PetriNetUnfolder]: For 156/156 co-relation queries the response was YES. [2023-08-31 11:29:49,527 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 11:29:49,527 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 11:29:49,527 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 11:29:49,528 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 11:29:49,528 INFO L85 PathProgramCache]: Analyzing trace with hash -1140410122, now seen corresponding path program 1 times [2023-08-31 11:29:49,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 11:29:49,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695793629] [2023-08-31 11:29:49,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 11:29:49,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 11:29:49,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:29:49,571 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 11:29:49,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:29:49,597 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 11:29:49,597 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 11:29:49,597 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 11:29:49,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-31 11:29:49,598 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 11:29:49,599 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 11:29:49,599 WARN L233 ceAbstractionStarter]: 9 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 11:29:49,599 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 10 thread instances. [2023-08-31 11:29:49,658 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 11:29:49,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 633 places, 683 transitions, 1506 flow [2023-08-31 11:29:49,851 INFO L130 PetriNetUnfolder]: 81/801 cut-off events. [2023-08-31 11:29:49,852 INFO L131 PetriNetUnfolder]: For 210/210 co-relation queries the response was YES. [2023-08-31 11:29:49,871 INFO L83 FinitePrefix]: Finished finitePrefix Result has 887 conditions, 801 events. 81/801 cut-off events. For 210/210 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 3593 event pairs, 0 based on Foata normal form. 0/629 useless extension candidates. Maximal degree in co-relation 779. Up to 22 conditions per place. [2023-08-31 11:29:49,872 INFO L82 GeneralOperation]: Start removeDead. Operand has 633 places, 683 transitions, 1506 flow [2023-08-31 11:29:49,879 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 633 places, 683 transitions, 1506 flow [2023-08-31 11:29:49,879 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 11:29:49,880 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 633 places, 683 transitions, 1506 flow [2023-08-31 11:29:49,880 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 633 places, 683 transitions, 1506 flow [2023-08-31 11:29:49,880 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 633 places, 683 transitions, 1506 flow [2023-08-31 11:29:50,076 INFO L130 PetriNetUnfolder]: 81/801 cut-off events. [2023-08-31 11:29:50,077 INFO L131 PetriNetUnfolder]: For 210/210 co-relation queries the response was YES. [2023-08-31 11:29:50,102 INFO L83 FinitePrefix]: Finished finitePrefix Result has 887 conditions, 801 events. 81/801 cut-off events. For 210/210 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 3593 event pairs, 0 based on Foata normal form. 0/629 useless extension candidates. Maximal degree in co-relation 779. Up to 22 conditions per place. [2023-08-31 11:29:50,170 INFO L119 LiptonReduction]: Number of co-enabled transitions 391040 [2023-08-31 11:29:58,373 INFO L134 LiptonReduction]: Checked pairs total: 1322201 [2023-08-31 11:29:58,373 INFO L136 LiptonReduction]: Total number of compositions: 550 [2023-08-31 11:29:58,376 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 11:29:58,376 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;@7eb31b6a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 11:29:58,376 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 11:29:58,406 INFO L130 PetriNetUnfolder]: 35/317 cut-off events. [2023-08-31 11:29:58,406 INFO L131 PetriNetUnfolder]: For 210/210 co-relation queries the response was YES. [2023-08-31 11:29:58,406 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 11:29:58,406 INFO L208 CegarLoopForPetriNet]: trace histogram [11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 11:29:58,406 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 11:29:58,406 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 11:29:58,407 INFO L85 PathProgramCache]: Analyzing trace with hash -1322615149, now seen corresponding path program 1 times [2023-08-31 11:29:58,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 11:29:58,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286839462] [2023-08-31 11:29:58,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 11:29:58,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 11:29:58,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:29:58,426 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 11:29:58,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:29:58,442 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 11:29:58,443 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 11:29:58,443 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 11:29:58,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-31 11:29:58,443 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 11:29:58,444 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 11:29:58,444 WARN L233 ceAbstractionStarter]: 10 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 11:29:58,444 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 11 thread instances. [2023-08-31 11:29:58,501 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 11:29:58,505 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 693 places, 748 transitions, 1661 flow [2023-08-31 11:29:58,707 INFO L130 PetriNetUnfolder]: 89/878 cut-off events. [2023-08-31 11:29:58,708 INFO L131 PetriNetUnfolder]: For 275/275 co-relation queries the response was YES. [2023-08-31 11:29:58,731 INFO L83 FinitePrefix]: Finished finitePrefix Result has 978 conditions, 878 events. 89/878 cut-off events. For 275/275 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 3986 event pairs, 0 based on Foata normal form. 0/689 useless extension candidates. Maximal degree in co-relation 869. Up to 24 conditions per place. [2023-08-31 11:29:58,731 INFO L82 GeneralOperation]: Start removeDead. Operand has 693 places, 748 transitions, 1661 flow [2023-08-31 11:29:58,738 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 693 places, 748 transitions, 1661 flow [2023-08-31 11:29:58,738 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 11:29:58,739 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 693 places, 748 transitions, 1661 flow [2023-08-31 11:29:58,739 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 693 places, 748 transitions, 1661 flow [2023-08-31 11:29:58,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 693 places, 748 transitions, 1661 flow [2023-08-31 11:29:58,965 INFO L130 PetriNetUnfolder]: 89/878 cut-off events. [2023-08-31 11:29:58,965 INFO L131 PetriNetUnfolder]: For 275/275 co-relation queries the response was YES. [2023-08-31 11:29:58,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 978 conditions, 878 events. 89/878 cut-off events. For 275/275 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 3986 event pairs, 0 based on Foata normal form. 0/689 useless extension candidates. Maximal degree in co-relation 869. Up to 24 conditions per place. [2023-08-31 11:29:59,040 INFO L119 LiptonReduction]: Number of co-enabled transitions 475904 [2023-08-31 11:30:07,769 INFO L134 LiptonReduction]: Checked pairs total: 1610267 [2023-08-31 11:30:07,769 INFO L136 LiptonReduction]: Total number of compositions: 606 [2023-08-31 11:30:07,771 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 11:30:07,772 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;@7eb31b6a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 11:30:07,772 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 11:30:07,837 INFO L130 PetriNetUnfolder]: 39/351 cut-off events. [2023-08-31 11:30:07,837 INFO L131 PetriNetUnfolder]: For 275/275 co-relation queries the response was YES. [2023-08-31 11:30:07,837 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 11:30:07,838 INFO L208 CegarLoopForPetriNet]: trace histogram [12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 11:30:07,838 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 11:30:07,839 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 11:30:07,839 INFO L85 PathProgramCache]: Analyzing trace with hash 420169905, now seen corresponding path program 1 times [2023-08-31 11:30:07,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 11:30:07,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064436980] [2023-08-31 11:30:07,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 11:30:07,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 11:30:07,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:30:07,872 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 11:30:07,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:30:07,899 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 11:30:07,899 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 11:30:07,900 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 11:30:07,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-31 11:30:07,900 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 11:30:07,901 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 11:30:07,901 WARN L233 ceAbstractionStarter]: 11 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 11:30:07,901 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 12 thread instances. [2023-08-31 11:30:07,962 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 11:30:07,967 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 753 places, 813 transitions, 1818 flow [2023-08-31 11:30:08,236 INFO L130 PetriNetUnfolder]: 97/955 cut-off events. [2023-08-31 11:30:08,237 INFO L131 PetriNetUnfolder]: For 352/352 co-relation queries the response was YES. [2023-08-31 11:30:08,270 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1070 conditions, 955 events. 97/955 cut-off events. For 352/352 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 4406 event pairs, 0 based on Foata normal form. 0/749 useless extension candidates. Maximal degree in co-relation 960. Up to 26 conditions per place. [2023-08-31 11:30:08,270 INFO L82 GeneralOperation]: Start removeDead. Operand has 753 places, 813 transitions, 1818 flow [2023-08-31 11:30:08,278 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 753 places, 813 transitions, 1818 flow [2023-08-31 11:30:08,278 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 11:30:08,279 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 753 places, 813 transitions, 1818 flow [2023-08-31 11:30:08,279 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 753 places, 813 transitions, 1818 flow [2023-08-31 11:30:08,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 753 places, 813 transitions, 1818 flow [2023-08-31 11:30:08,578 INFO L130 PetriNetUnfolder]: 97/955 cut-off events. [2023-08-31 11:30:08,579 INFO L131 PetriNetUnfolder]: For 352/352 co-relation queries the response was YES. [2023-08-31 11:30:08,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1070 conditions, 955 events. 97/955 cut-off events. For 352/352 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 4406 event pairs, 0 based on Foata normal form. 0/749 useless extension candidates. Maximal degree in co-relation 960. Up to 26 conditions per place. [2023-08-31 11:30:08,681 INFO L119 LiptonReduction]: Number of co-enabled transitions 569088 [2023-08-31 11:30:18,338 INFO L134 LiptonReduction]: Checked pairs total: 1906674 [2023-08-31 11:30:18,338 INFO L136 LiptonReduction]: Total number of compositions: 649 [2023-08-31 11:30:18,339 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 11:30:18,340 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;@7eb31b6a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 11:30:18,340 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 11:30:18,394 INFO L130 PetriNetUnfolder]: 43/385 cut-off events. [2023-08-31 11:30:18,394 INFO L131 PetriNetUnfolder]: For 352/352 co-relation queries the response was YES. [2023-08-31 11:30:18,395 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 11:30:18,395 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 11:30:18,395 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 11:30:18,395 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 11:30:18,395 INFO L85 PathProgramCache]: Analyzing trace with hash -1981335295, now seen corresponding path program 1 times [2023-08-31 11:30:18,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 11:30:18,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075473789] [2023-08-31 11:30:18,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 11:30:18,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 11:30:18,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:30:18,418 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 11:30:18,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:30:18,447 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 11:30:18,447 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 11:30:18,447 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 11:30:18,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-31 11:30:18,448 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 11:30:18,450 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 11:30:18,451 WARN L233 ceAbstractionStarter]: 12 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 11:30:18,451 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 13 thread instances. [2023-08-31 11:30:18,560 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 11:30:18,567 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 813 places, 878 transitions, 1977 flow [2023-08-31 11:30:18,892 INFO L130 PetriNetUnfolder]: 105/1032 cut-off events. [2023-08-31 11:30:18,893 INFO L131 PetriNetUnfolder]: For 442/442 co-relation queries the response was YES. [2023-08-31 11:30:18,944 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1163 conditions, 1032 events. 105/1032 cut-off events. For 442/442 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 4769 event pairs, 0 based on Foata normal form. 0/809 useless extension candidates. Maximal degree in co-relation 1052. Up to 28 conditions per place. [2023-08-31 11:30:18,945 INFO L82 GeneralOperation]: Start removeDead. Operand has 813 places, 878 transitions, 1977 flow [2023-08-31 11:30:18,958 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 813 places, 878 transitions, 1977 flow [2023-08-31 11:30:18,959 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 11:30:18,959 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 813 places, 878 transitions, 1977 flow [2023-08-31 11:30:18,959 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 813 places, 878 transitions, 1977 flow [2023-08-31 11:30:18,959 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 813 places, 878 transitions, 1977 flow [2023-08-31 11:30:19,331 INFO L130 PetriNetUnfolder]: 105/1032 cut-off events. [2023-08-31 11:30:19,332 INFO L131 PetriNetUnfolder]: For 442/442 co-relation queries the response was YES. [2023-08-31 11:30:19,370 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1163 conditions, 1032 events. 105/1032 cut-off events. For 442/442 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 4769 event pairs, 0 based on Foata normal form. 0/809 useless extension candidates. Maximal degree in co-relation 1052. Up to 28 conditions per place. [2023-08-31 11:30:19,485 INFO L119 LiptonReduction]: Number of co-enabled transitions 670592 [2023-08-31 11:30:29,722 INFO L134 LiptonReduction]: Checked pairs total: 2239363 [2023-08-31 11:30:29,722 INFO L136 LiptonReduction]: Total number of compositions: 701 [2023-08-31 11:30:29,723 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 11:30:29,724 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;@7eb31b6a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 11:30:29,724 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 11:30:29,784 INFO L130 PetriNetUnfolder]: 47/419 cut-off events. [2023-08-31 11:30:29,785 INFO L131 PetriNetUnfolder]: For 442/442 co-relation queries the response was YES. [2023-08-31 11:30:29,785 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 11:30:29,785 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 11:30:29,785 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 11:30:29,785 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 11:30:29,786 INFO L85 PathProgramCache]: Analyzing trace with hash 438538470, now seen corresponding path program 1 times [2023-08-31 11:30:29,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 11:30:29,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763452568] [2023-08-31 11:30:29,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 11:30:29,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 11:30:29,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:30:29,806 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 11:30:29,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:30:29,827 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 11:30:29,828 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 11:30:29,828 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 11:30:29,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-31 11:30:29,828 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 11:30:29,829 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 11:30:29,829 WARN L233 ceAbstractionStarter]: 13 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 11:30:29,829 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 14 thread instances. [2023-08-31 11:30:29,903 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 11:30:29,909 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 873 places, 943 transitions, 2138 flow [2023-08-31 11:30:30,297 INFO L130 PetriNetUnfolder]: 113/1109 cut-off events. [2023-08-31 11:30:30,297 INFO L131 PetriNetUnfolder]: For 546/546 co-relation queries the response was YES. [2023-08-31 11:30:30,327 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1257 conditions, 1109 events. 113/1109 cut-off events. For 546/546 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 5179 event pairs, 0 based on Foata normal form. 0/869 useless extension candidates. Maximal degree in co-relation 1145. Up to 30 conditions per place. [2023-08-31 11:30:30,328 INFO L82 GeneralOperation]: Start removeDead. Operand has 873 places, 943 transitions, 2138 flow [2023-08-31 11:30:30,338 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 873 places, 943 transitions, 2138 flow [2023-08-31 11:30:30,338 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 11:30:30,338 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 873 places, 943 transitions, 2138 flow [2023-08-31 11:30:30,338 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 873 places, 943 transitions, 2138 flow [2023-08-31 11:30:30,338 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 873 places, 943 transitions, 2138 flow [2023-08-31 11:30:30,597 INFO L130 PetriNetUnfolder]: 113/1109 cut-off events. [2023-08-31 11:30:30,597 INFO L131 PetriNetUnfolder]: For 546/546 co-relation queries the response was YES. [2023-08-31 11:30:30,634 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1257 conditions, 1109 events. 113/1109 cut-off events. For 546/546 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 5179 event pairs, 0 based on Foata normal form. 0/869 useless extension candidates. Maximal degree in co-relation 1145. Up to 30 conditions per place. [2023-08-31 11:30:30,749 INFO L119 LiptonReduction]: Number of co-enabled transitions 780416 [2023-08-31 11:30:41,926 INFO L134 LiptonReduction]: Checked pairs total: 2609040 [2023-08-31 11:30:41,926 INFO L136 LiptonReduction]: Total number of compositions: 753 [2023-08-31 11:30:41,927 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 11:30:41,928 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;@7eb31b6a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 11:30:41,928 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 11:30:41,982 INFO L130 PetriNetUnfolder]: 51/453 cut-off events. [2023-08-31 11:30:41,982 INFO L131 PetriNetUnfolder]: For 546/546 co-relation queries the response was YES. [2023-08-31 11:30:41,982 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 11:30:41,982 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 11:30:41,982 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 11:30:41,983 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 11:30:41,983 INFO L85 PathProgramCache]: Analyzing trace with hash 1608331858, now seen corresponding path program 1 times [2023-08-31 11:30:41,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 11:30:41,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250068114] [2023-08-31 11:30:41,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 11:30:41,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 11:30:42,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:30:42,012 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 11:30:42,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:30:42,041 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 11:30:42,041 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 11:30:42,042 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 11:30:42,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-31 11:30:42,042 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 11:30:42,042 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 11:30:42,043 WARN L233 ceAbstractionStarter]: 14 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 11:30:42,043 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 15 thread instances. [2023-08-31 11:30:42,140 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 11:30:42,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 933 places, 1008 transitions, 2301 flow [2023-08-31 11:30:42,598 INFO L130 PetriNetUnfolder]: 121/1186 cut-off events. [2023-08-31 11:30:42,600 INFO L131 PetriNetUnfolder]: For 665/665 co-relation queries the response was YES. [2023-08-31 11:30:42,646 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1352 conditions, 1186 events. 121/1186 cut-off events. For 665/665 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 5538 event pairs, 0 based on Foata normal form. 0/929 useless extension candidates. Maximal degree in co-relation 1239. Up to 32 conditions per place. [2023-08-31 11:30:42,646 INFO L82 GeneralOperation]: Start removeDead. Operand has 933 places, 1008 transitions, 2301 flow [2023-08-31 11:30:42,658 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 933 places, 1008 transitions, 2301 flow [2023-08-31 11:30:42,658 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 11:30:42,659 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 933 places, 1008 transitions, 2301 flow [2023-08-31 11:30:42,659 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 933 places, 1008 transitions, 2301 flow [2023-08-31 11:30:42,659 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 933 places, 1008 transitions, 2301 flow [2023-08-31 11:30:42,954 INFO L130 PetriNetUnfolder]: 121/1186 cut-off events. [2023-08-31 11:30:42,954 INFO L131 PetriNetUnfolder]: For 665/665 co-relation queries the response was YES. [2023-08-31 11:30:42,999 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1352 conditions, 1186 events. 121/1186 cut-off events. For 665/665 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 5538 event pairs, 0 based on Foata normal form. 0/929 useless extension candidates. Maximal degree in co-relation 1239. Up to 32 conditions per place. [2023-08-31 11:30:43,204 INFO L119 LiptonReduction]: Number of co-enabled transitions 898560 [2023-08-31 11:30:54,664 INFO L134 LiptonReduction]: Checked pairs total: 3032760 [2023-08-31 11:30:54,664 INFO L136 LiptonReduction]: Total number of compositions: 809 [2023-08-31 11:30:54,665 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 11:30:54,666 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;@7eb31b6a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 11:30:54,666 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 11:30:54,773 INFO L130 PetriNetUnfolder]: 55/487 cut-off events. [2023-08-31 11:30:54,774 INFO L131 PetriNetUnfolder]: For 665/665 co-relation queries the response was YES. [2023-08-31 11:30:54,774 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 11:30:54,774 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 11:30:54,774 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 11:30:54,774 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 11:30:54,775 INFO L85 PathProgramCache]: Analyzing trace with hash -1080175737, now seen corresponding path program 1 times [2023-08-31 11:30:54,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 11:30:54,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843713903] [2023-08-31 11:30:54,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 11:30:54,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 11:30:54,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:30:54,799 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 11:30:54,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:30:54,824 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 11:30:54,825 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 11:30:54,825 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 11:30:54,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-31 11:30:54,825 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 11:30:54,826 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 11:30:54,826 WARN L233 ceAbstractionStarter]: 15 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 11:30:54,826 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 16 thread instances. [2023-08-31 11:30:54,931 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 11:30:54,940 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 993 places, 1073 transitions, 2466 flow [2023-08-31 11:30:55,406 INFO L130 PetriNetUnfolder]: 129/1263 cut-off events. [2023-08-31 11:30:55,406 INFO L131 PetriNetUnfolder]: For 800/800 co-relation queries the response was YES. [2023-08-31 11:30:55,459 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1448 conditions, 1263 events. 129/1263 cut-off events. For 800/800 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 5979 event pairs, 0 based on Foata normal form. 0/989 useless extension candidates. Maximal degree in co-relation 1334. Up to 34 conditions per place. [2023-08-31 11:30:55,459 INFO L82 GeneralOperation]: Start removeDead. Operand has 993 places, 1073 transitions, 2466 flow [2023-08-31 11:30:55,474 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 993 places, 1073 transitions, 2466 flow [2023-08-31 11:30:55,474 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 11:30:55,474 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 993 places, 1073 transitions, 2466 flow [2023-08-31 11:30:55,474 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 993 places, 1073 transitions, 2466 flow [2023-08-31 11:30:55,474 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 993 places, 1073 transitions, 2466 flow [2023-08-31 11:30:55,884 INFO L130 PetriNetUnfolder]: 129/1263 cut-off events. [2023-08-31 11:30:55,884 INFO L131 PetriNetUnfolder]: For 800/800 co-relation queries the response was YES. [2023-08-31 11:30:55,924 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1448 conditions, 1263 events. 129/1263 cut-off events. For 800/800 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 5979 event pairs, 0 based on Foata normal form. 0/989 useless extension candidates. Maximal degree in co-relation 1334. Up to 34 conditions per place. [2023-08-31 11:30:56,048 INFO L119 LiptonReduction]: Number of co-enabled transitions 1025024 [2023-08-31 11:31:08,408 INFO L134 LiptonReduction]: Checked pairs total: 3434017 [2023-08-31 11:31:08,408 INFO L136 LiptonReduction]: Total number of compositions: 861 [2023-08-31 11:31:08,409 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 11:31:08,410 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;@7eb31b6a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 11:31:08,410 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 11:31:08,479 INFO L130 PetriNetUnfolder]: 59/521 cut-off events. [2023-08-31 11:31:08,479 INFO L131 PetriNetUnfolder]: For 800/800 co-relation queries the response was YES. [2023-08-31 11:31:08,480 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 11:31:08,480 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 11:31:08,480 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 11:31:08,480 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 11:31:08,480 INFO L85 PathProgramCache]: Analyzing trace with hash 1898380607, now seen corresponding path program 1 times [2023-08-31 11:31:08,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 11:31:08,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306963759] [2023-08-31 11:31:08,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 11:31:08,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 11:31:08,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:31:08,505 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 11:31:08,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:31:08,531 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 11:31:08,532 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 11:31:08,532 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 11:31:08,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-31 11:31:08,532 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 11:31:08,533 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 11:31:08,533 WARN L233 ceAbstractionStarter]: 16 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 11:31:08,533 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 17 thread instances. [2023-08-31 11:31:08,615 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 11:31:08,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1053 places, 1138 transitions, 2633 flow [2023-08-31 11:31:09,103 INFO L130 PetriNetUnfolder]: 137/1340 cut-off events. [2023-08-31 11:31:09,104 INFO L131 PetriNetUnfolder]: For 952/952 co-relation queries the response was YES. [2023-08-31 11:31:09,160 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1545 conditions, 1340 events. 137/1340 cut-off events. For 952/952 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 6369 event pairs, 0 based on Foata normal form. 0/1049 useless extension candidates. Maximal degree in co-relation 1430. Up to 36 conditions per place. [2023-08-31 11:31:09,161 INFO L82 GeneralOperation]: Start removeDead. Operand has 1053 places, 1138 transitions, 2633 flow [2023-08-31 11:31:09,175 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1053 places, 1138 transitions, 2633 flow [2023-08-31 11:31:09,176 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 11:31:09,176 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1053 places, 1138 transitions, 2633 flow [2023-08-31 11:31:09,176 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1053 places, 1138 transitions, 2633 flow [2023-08-31 11:31:09,176 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1053 places, 1138 transitions, 2633 flow [2023-08-31 11:31:09,558 INFO L130 PetriNetUnfolder]: 137/1340 cut-off events. [2023-08-31 11:31:09,558 INFO L131 PetriNetUnfolder]: For 952/952 co-relation queries the response was YES. [2023-08-31 11:31:09,617 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1545 conditions, 1340 events. 137/1340 cut-off events. For 952/952 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 6369 event pairs, 0 based on Foata normal form. 0/1049 useless extension candidates. Maximal degree in co-relation 1430. Up to 36 conditions per place. [2023-08-31 11:31:09,843 INFO L119 LiptonReduction]: Number of co-enabled transitions 1159808 [2023-08-31 11:31:23,407 INFO L134 LiptonReduction]: Checked pairs total: 4293723 [2023-08-31 11:31:23,407 INFO L136 LiptonReduction]: Total number of compositions: 919 [2023-08-31 11:31:23,409 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 11:31:23,409 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;@7eb31b6a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 11:31:23,409 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 11:31:23,484 INFO L130 PetriNetUnfolder]: 63/555 cut-off events. [2023-08-31 11:31:23,484 INFO L131 PetriNetUnfolder]: For 952/952 co-relation queries the response was YES. [2023-08-31 11:31:23,484 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 11:31:23,484 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 11:31:23,485 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 11:31:23,485 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 11:31:23,485 INFO L85 PathProgramCache]: Analyzing trace with hash -656683957, now seen corresponding path program 1 times [2023-08-31 11:31:23,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 11:31:23,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866321858] [2023-08-31 11:31:23,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 11:31:23,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 11:31:23,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:31:23,509 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 11:31:23,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:31:23,537 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 11:31:23,538 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 11:31:23,538 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 11:31:23,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-31 11:31:23,538 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 11:31:23,539 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 11:31:23,539 WARN L233 ceAbstractionStarter]: 17 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 11:31:23,539 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 18 thread instances. [2023-08-31 11:31:23,621 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 11:31:23,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1113 places, 1203 transitions, 2802 flow [2023-08-31 11:31:24,081 INFO L130 PetriNetUnfolder]: 145/1417 cut-off events. [2023-08-31 11:31:24,082 INFO L131 PetriNetUnfolder]: For 1122/1122 co-relation queries the response was YES. [2023-08-31 11:31:24,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1643 conditions, 1417 events. 145/1417 cut-off events. For 1122/1122 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 6763 event pairs, 0 based on Foata normal form. 0/1109 useless extension candidates. Maximal degree in co-relation 1527. Up to 38 conditions per place. [2023-08-31 11:31:24,141 INFO L82 GeneralOperation]: Start removeDead. Operand has 1113 places, 1203 transitions, 2802 flow [2023-08-31 11:31:24,157 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1113 places, 1203 transitions, 2802 flow [2023-08-31 11:31:24,157 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 11:31:24,157 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1113 places, 1203 transitions, 2802 flow [2023-08-31 11:31:24,157 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1113 places, 1203 transitions, 2802 flow [2023-08-31 11:31:24,157 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1113 places, 1203 transitions, 2802 flow [2023-08-31 11:31:24,577 INFO L130 PetriNetUnfolder]: 145/1417 cut-off events. [2023-08-31 11:31:24,577 INFO L131 PetriNetUnfolder]: For 1122/1122 co-relation queries the response was YES. [2023-08-31 11:31:24,645 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1643 conditions, 1417 events. 145/1417 cut-off events. For 1122/1122 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 6763 event pairs, 0 based on Foata normal form. 0/1109 useless extension candidates. Maximal degree in co-relation 1527. Up to 38 conditions per place. [2023-08-31 11:31:24,849 INFO L119 LiptonReduction]: Number of co-enabled transitions 1302912 [2023-08-31 11:31:39,684 INFO L134 LiptonReduction]: Checked pairs total: 4434102 [2023-08-31 11:31:39,685 INFO L136 LiptonReduction]: Total number of compositions: 968 [2023-08-31 11:31:39,686 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 11:31:39,687 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;@7eb31b6a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 11:31:39,687 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 11:31:39,809 INFO L130 PetriNetUnfolder]: 67/589 cut-off events. [2023-08-31 11:31:39,809 INFO L131 PetriNetUnfolder]: For 1122/1122 co-relation queries the response was YES. [2023-08-31 11:31:39,810 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 11:31:39,810 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 11:31:39,810 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 11:31:39,810 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 11:31:39,810 INFO L85 PathProgramCache]: Analyzing trace with hash 1863001758, now seen corresponding path program 1 times [2023-08-31 11:31:39,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 11:31:39,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920301771] [2023-08-31 11:31:39,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 11:31:39,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 11:31:39,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:31:39,837 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 11:31:39,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:31:39,888 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 11:31:39,890 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 11:31:39,890 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 11:31:39,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-31 11:31:39,890 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 11:31:39,891 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 11:31:39,891 WARN L233 ceAbstractionStarter]: 18 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 11:31:39,891 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 19 thread instances. [2023-08-31 11:31:39,970 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 11:31:39,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1173 places, 1268 transitions, 2973 flow [2023-08-31 11:31:40,506 INFO L130 PetriNetUnfolder]: 153/1494 cut-off events. [2023-08-31 11:31:40,507 INFO L131 PetriNetUnfolder]: For 1311/1311 co-relation queries the response was YES. [2023-08-31 11:31:40,567 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1742 conditions, 1494 events. 153/1494 cut-off events. For 1311/1311 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 7178 event pairs, 0 based on Foata normal form. 0/1169 useless extension candidates. Maximal degree in co-relation 1625. Up to 40 conditions per place. [2023-08-31 11:31:40,568 INFO L82 GeneralOperation]: Start removeDead. Operand has 1173 places, 1268 transitions, 2973 flow [2023-08-31 11:31:40,583 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1173 places, 1268 transitions, 2973 flow [2023-08-31 11:31:40,583 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 11:31:40,583 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1173 places, 1268 transitions, 2973 flow [2023-08-31 11:31:40,583 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1173 places, 1268 transitions, 2973 flow [2023-08-31 11:31:40,583 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1173 places, 1268 transitions, 2973 flow [2023-08-31 11:31:41,046 INFO L130 PetriNetUnfolder]: 153/1494 cut-off events. [2023-08-31 11:31:41,046 INFO L131 PetriNetUnfolder]: For 1311/1311 co-relation queries the response was YES. [2023-08-31 11:31:41,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1742 conditions, 1494 events. 153/1494 cut-off events. For 1311/1311 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 7178 event pairs, 0 based on Foata normal form. 0/1169 useless extension candidates. Maximal degree in co-relation 1625. Up to 40 conditions per place. [2023-08-31 11:31:41,353 INFO L119 LiptonReduction]: Number of co-enabled transitions 1454336 [2023-08-31 11:31:56,958 INFO L134 LiptonReduction]: Checked pairs total: 5378054 [2023-08-31 11:31:56,958 INFO L136 LiptonReduction]: Total number of compositions: 1019 [2023-08-31 11:31:56,960 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 11:31:56,960 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;@7eb31b6a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 11:31:56,960 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 11:31:57,053 INFO L130 PetriNetUnfolder]: 71/623 cut-off events. [2023-08-31 11:31:57,053 INFO L131 PetriNetUnfolder]: For 1311/1311 co-relation queries the response was YES. [2023-08-31 11:31:57,053 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 11:31:57,053 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 11:31:57,053 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 11:31:57,054 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 11:31:57,054 INFO L85 PathProgramCache]: Analyzing trace with hash -2057645650, now seen corresponding path program 1 times [2023-08-31 11:31:57,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 11:31:57,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181136449] [2023-08-31 11:31:57,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 11:31:57,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 11:31:57,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:31:57,082 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 11:31:57,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:31:57,113 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 11:31:57,114 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 11:31:57,114 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 11:31:57,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-08-31 11:31:57,114 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 11:31:57,115 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 11:31:57,115 WARN L233 ceAbstractionStarter]: 19 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 11:31:57,115 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 20 thread instances. [2023-08-31 11:31:57,202 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 11:31:57,209 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1233 places, 1333 transitions, 3146 flow [2023-08-31 11:31:57,736 INFO L130 PetriNetUnfolder]: 161/1571 cut-off events. [2023-08-31 11:31:57,737 INFO L131 PetriNetUnfolder]: For 1520/1520 co-relation queries the response was YES. [2023-08-31 11:31:57,824 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1842 conditions, 1571 events. 161/1571 cut-off events. For 1520/1520 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 7559 event pairs, 0 based on Foata normal form. 0/1229 useless extension candidates. Maximal degree in co-relation 1724. Up to 42 conditions per place. [2023-08-31 11:31:57,824 INFO L82 GeneralOperation]: Start removeDead. Operand has 1233 places, 1333 transitions, 3146 flow [2023-08-31 11:31:57,846 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1233 places, 1333 transitions, 3146 flow [2023-08-31 11:31:57,846 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 11:31:57,846 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1233 places, 1333 transitions, 3146 flow [2023-08-31 11:31:57,846 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1233 places, 1333 transitions, 3146 flow [2023-08-31 11:31:57,846 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1233 places, 1333 transitions, 3146 flow [2023-08-31 11:31:58,372 INFO L130 PetriNetUnfolder]: 161/1571 cut-off events. [2023-08-31 11:31:58,372 INFO L131 PetriNetUnfolder]: For 1520/1520 co-relation queries the response was YES. [2023-08-31 11:31:58,448 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1842 conditions, 1571 events. 161/1571 cut-off events. For 1520/1520 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 7559 event pairs, 0 based on Foata normal form. 0/1229 useless extension candidates. Maximal degree in co-relation 1724. Up to 42 conditions per place. [2023-08-31 11:31:58,683 INFO L119 LiptonReduction]: Number of co-enabled transitions 1614080 [2023-08-31 11:32:15,090 INFO L134 LiptonReduction]: Checked pairs total: 5431529 [2023-08-31 11:32:15,090 INFO L136 LiptonReduction]: Total number of compositions: 1064 [2023-08-31 11:32:15,092 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 11:32:15,092 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;@7eb31b6a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 11:32:15,092 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 11:32:15,228 INFO L130 PetriNetUnfolder]: 75/657 cut-off events. [2023-08-31 11:32:15,228 INFO L131 PetriNetUnfolder]: For 1520/1520 co-relation queries the response was YES. [2023-08-31 11:32:15,228 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 11:32:15,228 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 11:32:15,228 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 11:32:15,228 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 11:32:15,228 INFO L85 PathProgramCache]: Analyzing trace with hash -863816864, now seen corresponding path program 1 times [2023-08-31 11:32:15,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 11:32:15,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496474808] [2023-08-31 11:32:15,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 11:32:15,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 11:32:15,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:32:15,254 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 11:32:15,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:32:15,286 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 11:32:15,286 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 11:32:15,287 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 11:32:15,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-08-31 11:32:15,287 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 11:32:15,287 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 11:32:15,287 WARN L233 ceAbstractionStarter]: 20 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 11:32:15,288 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 21 thread instances. [2023-08-31 11:32:15,373 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 11:32:15,379 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1293 places, 1398 transitions, 3321 flow [2023-08-31 11:32:15,953 INFO L130 PetriNetUnfolder]: 169/1648 cut-off events. [2023-08-31 11:32:15,953 INFO L131 PetriNetUnfolder]: For 1750/1750 co-relation queries the response was YES. [2023-08-31 11:32:16,053 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1943 conditions, 1648 events. 169/1648 cut-off events. For 1750/1750 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 7992 event pairs, 0 based on Foata normal form. 0/1289 useless extension candidates. Maximal degree in co-relation 1824. Up to 44 conditions per place. [2023-08-31 11:32:16,053 INFO L82 GeneralOperation]: Start removeDead. Operand has 1293 places, 1398 transitions, 3321 flow [2023-08-31 11:32:16,077 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1293 places, 1398 transitions, 3321 flow [2023-08-31 11:32:16,077 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 11:32:16,077 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1293 places, 1398 transitions, 3321 flow [2023-08-31 11:32:16,078 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1293 places, 1398 transitions, 3321 flow [2023-08-31 11:32:16,078 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1293 places, 1398 transitions, 3321 flow [2023-08-31 11:32:16,714 INFO L130 PetriNetUnfolder]: 169/1648 cut-off events. [2023-08-31 11:32:16,714 INFO L131 PetriNetUnfolder]: For 1750/1750 co-relation queries the response was YES. [2023-08-31 11:32:16,790 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1943 conditions, 1648 events. 169/1648 cut-off events. For 1750/1750 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 7992 event pairs, 0 based on Foata normal form. 0/1289 useless extension candidates. Maximal degree in co-relation 1824. Up to 44 conditions per place. [2023-08-31 11:32:17,024 INFO L119 LiptonReduction]: Number of co-enabled transitions 1782144 [2023-08-31 11:32:34,253 INFO L134 LiptonReduction]: Checked pairs total: 6039126 [2023-08-31 11:32:34,253 INFO L136 LiptonReduction]: Total number of compositions: 1132 [2023-08-31 11:32:34,255 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 11:32:34,255 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;@7eb31b6a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 11:32:34,255 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 11:32:34,376 INFO L130 PetriNetUnfolder]: 79/691 cut-off events. [2023-08-31 11:32:34,377 INFO L131 PetriNetUnfolder]: For 1750/1750 co-relation queries the response was YES. [2023-08-31 11:32:34,377 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 11:32:34,377 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 11:32:34,377 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 11:32:34,378 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 11:32:34,378 INFO L85 PathProgramCache]: Analyzing trace with hash -1894471898, now seen corresponding path program 1 times [2023-08-31 11:32:34,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 11:32:34,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168482805] [2023-08-31 11:32:34,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 11:32:34,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 11:32:34,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:32:34,455 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 11:32:34,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:32:34,490 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 11:32:34,491 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 11:32:34,491 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 11:32:34,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-08-31 11:32:34,491 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 11:32:34,492 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 11:32:34,492 WARN L233 ceAbstractionStarter]: 21 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 11:32:34,492 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 22 thread instances. [2023-08-31 11:32:34,591 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 11:32:34,598 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1353 places, 1463 transitions, 3498 flow [2023-08-31 11:32:35,227 INFO L130 PetriNetUnfolder]: 177/1725 cut-off events. [2023-08-31 11:32:35,227 INFO L131 PetriNetUnfolder]: For 2002/2002 co-relation queries the response was YES. [2023-08-31 11:32:35,340 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2045 conditions, 1725 events. 177/1725 cut-off events. For 2002/2002 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 8394 event pairs, 0 based on Foata normal form. 0/1349 useless extension candidates. Maximal degree in co-relation 1925. Up to 46 conditions per place. [2023-08-31 11:32:35,340 INFO L82 GeneralOperation]: Start removeDead. Operand has 1353 places, 1463 transitions, 3498 flow [2023-08-31 11:32:35,367 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1353 places, 1463 transitions, 3498 flow [2023-08-31 11:32:35,368 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 11:32:35,368 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1353 places, 1463 transitions, 3498 flow [2023-08-31 11:32:35,368 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1353 places, 1463 transitions, 3498 flow [2023-08-31 11:32:35,368 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1353 places, 1463 transitions, 3498 flow [2023-08-31 11:32:36,134 INFO L130 PetriNetUnfolder]: 177/1725 cut-off events. [2023-08-31 11:32:36,135 INFO L131 PetriNetUnfolder]: For 2002/2002 co-relation queries the response was YES. [2023-08-31 11:32:36,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2045 conditions, 1725 events. 177/1725 cut-off events. For 2002/2002 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 8394 event pairs, 0 based on Foata normal form. 0/1349 useless extension candidates. Maximal degree in co-relation 1925. Up to 46 conditions per place. [2023-08-31 11:32:36,456 INFO L119 LiptonReduction]: Number of co-enabled transitions 1958528 [2023-08-31 11:32:54,588 INFO L134 LiptonReduction]: Checked pairs total: 6629635 [2023-08-31 11:32:54,588 INFO L136 LiptonReduction]: Total number of compositions: 1171 [2023-08-31 11:32:54,590 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 11:32:54,591 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;@7eb31b6a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 11:32:54,591 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 11:32:54,724 INFO L130 PetriNetUnfolder]: 83/725 cut-off events. [2023-08-31 11:32:54,724 INFO L131 PetriNetUnfolder]: For 2002/2002 co-relation queries the response was YES. [2023-08-31 11:32:54,724 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 11:32:54,724 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 11:32:54,725 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 11:32:54,725 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 11:32:54,725 INFO L85 PathProgramCache]: Analyzing trace with hash 2125609083, now seen corresponding path program 1 times [2023-08-31 11:32:54,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 11:32:54,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749901567] [2023-08-31 11:32:54,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 11:32:54,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 11:32:54,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:32:54,799 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 11:32:54,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:32:54,848 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 11:32:54,848 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 11:32:54,849 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 11:32:54,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-08-31 11:32:54,849 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 11:32:54,850 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 11:32:54,850 WARN L233 ceAbstractionStarter]: 22 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 11:32:54,850 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 23 thread instances. [2023-08-31 11:32:54,963 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 11:32:54,973 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1413 places, 1528 transitions, 3677 flow [2023-08-31 11:32:55,722 INFO L130 PetriNetUnfolder]: 185/1802 cut-off events. [2023-08-31 11:32:55,722 INFO L131 PetriNetUnfolder]: For 2277/2277 co-relation queries the response was YES. [2023-08-31 11:32:55,846 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2148 conditions, 1802 events. 185/1802 cut-off events. For 2277/2277 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 8773 event pairs, 0 based on Foata normal form. 0/1409 useless extension candidates. Maximal degree in co-relation 2027. Up to 48 conditions per place. [2023-08-31 11:32:55,846 INFO L82 GeneralOperation]: Start removeDead. Operand has 1413 places, 1528 transitions, 3677 flow [2023-08-31 11:32:55,877 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1413 places, 1528 transitions, 3677 flow [2023-08-31 11:32:55,877 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 11:32:55,878 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1413 places, 1528 transitions, 3677 flow [2023-08-31 11:32:55,878 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1413 places, 1528 transitions, 3677 flow [2023-08-31 11:32:55,878 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1413 places, 1528 transitions, 3677 flow [2023-08-31 11:32:56,683 INFO L130 PetriNetUnfolder]: 185/1802 cut-off events. [2023-08-31 11:32:56,683 INFO L131 PetriNetUnfolder]: For 2277/2277 co-relation queries the response was YES. [2023-08-31 11:32:56,774 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2148 conditions, 1802 events. 185/1802 cut-off events. For 2277/2277 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 8773 event pairs, 0 based on Foata normal form. 0/1409 useless extension candidates. Maximal degree in co-relation 2027. Up to 48 conditions per place. [2023-08-31 11:32:57,055 INFO L119 LiptonReduction]: Number of co-enabled transitions 2143232 [2023-08-31 11:33:15,957 INFO L134 LiptonReduction]: Checked pairs total: 7251914 [2023-08-31 11:33:15,957 INFO L136 LiptonReduction]: Total number of compositions: 1235 [2023-08-31 11:33:15,958 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 11:33:15,959 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;@7eb31b6a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 11:33:15,959 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 11:33:16,088 INFO L130 PetriNetUnfolder]: 87/759 cut-off events. [2023-08-31 11:33:16,089 INFO L131 PetriNetUnfolder]: For 2277/2277 co-relation queries the response was YES. [2023-08-31 11:33:16,089 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 11:33:16,089 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 11:33:16,089 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 11:33:16,089 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 11:33:16,089 INFO L85 PathProgramCache]: Analyzing trace with hash 729785228, now seen corresponding path program 1 times [2023-08-31 11:33:16,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 11:33:16,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231588145] [2023-08-31 11:33:16,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 11:33:16,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 11:33:16,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:33:16,125 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 11:33:16,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:33:16,165 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 11:33:16,166 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 11:33:16,166 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 11:33:16,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-08-31 11:33:16,166 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 11:33:16,167 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 11:33:16,167 WARN L233 ceAbstractionStarter]: 23 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 11:33:16,167 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 24 thread instances. [2023-08-31 11:33:16,280 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 11:33:16,288 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1473 places, 1593 transitions, 3858 flow [2023-08-31 11:33:17,074 INFO L130 PetriNetUnfolder]: 193/1879 cut-off events. [2023-08-31 11:33:17,074 INFO L131 PetriNetUnfolder]: For 2576/2576 co-relation queries the response was YES. [2023-08-31 11:33:17,202 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2252 conditions, 1879 events. 193/1879 cut-off events. For 2576/2576 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 9152 event pairs, 0 based on Foata normal form. 0/1469 useless extension candidates. Maximal degree in co-relation 2130. Up to 50 conditions per place. [2023-08-31 11:33:17,202 INFO L82 GeneralOperation]: Start removeDead. Operand has 1473 places, 1593 transitions, 3858 flow [2023-08-31 11:33:17,235 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1473 places, 1593 transitions, 3858 flow [2023-08-31 11:33:17,235 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 11:33:17,235 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1473 places, 1593 transitions, 3858 flow [2023-08-31 11:33:17,235 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1473 places, 1593 transitions, 3858 flow [2023-08-31 11:33:17,235 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1473 places, 1593 transitions, 3858 flow [2023-08-31 11:33:18,010 INFO L130 PetriNetUnfolder]: 193/1879 cut-off events. [2023-08-31 11:33:18,010 INFO L131 PetriNetUnfolder]: For 2576/2576 co-relation queries the response was YES. [2023-08-31 11:33:18,148 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2252 conditions, 1879 events. 193/1879 cut-off events. For 2576/2576 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 9152 event pairs, 0 based on Foata normal form. 0/1469 useless extension candidates. Maximal degree in co-relation 2130. Up to 50 conditions per place. [2023-08-31 11:33:18,736 INFO L119 LiptonReduction]: Number of co-enabled transitions 2336256 [2023-08-31 11:33:38,717 INFO L134 LiptonReduction]: Checked pairs total: 7915994 [2023-08-31 11:33:38,717 INFO L136 LiptonReduction]: Total number of compositions: 1286 [2023-08-31 11:33:38,719 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 11:33:38,719 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;@7eb31b6a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 11:33:38,719 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 11:33:38,884 INFO L130 PetriNetUnfolder]: 91/793 cut-off events. [2023-08-31 11:33:38,885 INFO L131 PetriNetUnfolder]: For 2576/2576 co-relation queries the response was YES. [2023-08-31 11:33:38,885 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 11:33:38,885 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 11:33:38,885 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 11:33:38,885 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 11:33:38,886 INFO L85 PathProgramCache]: Analyzing trace with hash -1869099609, now seen corresponding path program 1 times [2023-08-31 11:33:38,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 11:33:38,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963632199] [2023-08-31 11:33:38,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 11:33:38,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 11:33:38,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:33:38,920 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 11:33:38,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:33:38,964 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 11:33:38,965 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 11:33:38,965 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 11:33:38,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-08-31 11:33:38,965 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 11:33:38,966 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 11:33:38,966 WARN L233 ceAbstractionStarter]: 24 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 11:33:38,966 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 25 thread instances. [2023-08-31 11:33:39,084 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 11:33:39,093 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1533 places, 1658 transitions, 4041 flow [2023-08-31 11:33:40,231 INFO L130 PetriNetUnfolder]: 201/1956 cut-off events. [2023-08-31 11:33:40,231 INFO L131 PetriNetUnfolder]: For 2900/2900 co-relation queries the response was YES. [2023-08-31 11:33:40,336 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2357 conditions, 1956 events. 201/1956 cut-off events. For 2900/2900 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 9524 event pairs, 0 based on Foata normal form. 0/1529 useless extension candidates. Maximal degree in co-relation 2234. Up to 52 conditions per place. [2023-08-31 11:33:40,336 INFO L82 GeneralOperation]: Start removeDead. Operand has 1533 places, 1658 transitions, 4041 flow [2023-08-31 11:33:40,530 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1533 places, 1658 transitions, 4041 flow [2023-08-31 11:33:40,530 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 11:33:40,530 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1533 places, 1658 transitions, 4041 flow [2023-08-31 11:33:40,530 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1533 places, 1658 transitions, 4041 flow [2023-08-31 11:33:40,530 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1533 places, 1658 transitions, 4041 flow [2023-08-31 11:33:41,561 INFO L130 PetriNetUnfolder]: 201/1956 cut-off events. [2023-08-31 11:33:41,562 INFO L131 PetriNetUnfolder]: For 2900/2900 co-relation queries the response was YES. [2023-08-31 11:33:41,671 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2357 conditions, 1956 events. 201/1956 cut-off events. For 2900/2900 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 9524 event pairs, 0 based on Foata normal form. 0/1529 useless extension candidates. Maximal degree in co-relation 2234. Up to 52 conditions per place. [2023-08-31 11:33:42,160 INFO L119 LiptonReduction]: Number of co-enabled transitions 2537600 [2023-08-31 11:34:02,734 INFO L134 LiptonReduction]: Checked pairs total: 8528208 [2023-08-31 11:34:02,734 INFO L136 LiptonReduction]: Total number of compositions: 1321 [2023-08-31 11:34:02,735 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 11:34:02,736 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;@7eb31b6a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 11:34:02,736 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 11:34:02,893 INFO L130 PetriNetUnfolder]: 95/827 cut-off events. [2023-08-31 11:34:02,893 INFO L131 PetriNetUnfolder]: For 2900/2900 co-relation queries the response was YES. [2023-08-31 11:34:02,893 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 11:34:02,893 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 11:34:02,893 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 11:34:02,894 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 11:34:02,894 INFO L85 PathProgramCache]: Analyzing trace with hash -1166565568, now seen corresponding path program 1 times [2023-08-31 11:34:02,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 11:34:02,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568419933] [2023-08-31 11:34:02,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 11:34:02,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 11:34:02,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:34:02,932 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 11:34:02,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:34:02,984 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 11:34:02,984 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 11:34:02,984 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 11:34:02,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2023-08-31 11:34:02,984 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 11:34:02,985 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 11:34:02,985 WARN L233 ceAbstractionStarter]: 25 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 11:34:02,985 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 26 thread instances. [2023-08-31 11:34:03,145 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 11:34:03,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1593 places, 1723 transitions, 4226 flow [2023-08-31 11:34:04,282 INFO L130 PetriNetUnfolder]: 209/2033 cut-off events. [2023-08-31 11:34:04,283 INFO L131 PetriNetUnfolder]: For 3250/3250 co-relation queries the response was YES. [2023-08-31 11:34:04,398 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2463 conditions, 2033 events. 209/2033 cut-off events. For 3250/3250 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 9929 event pairs, 0 based on Foata normal form. 0/1589 useless extension candidates. Maximal degree in co-relation 2339. Up to 54 conditions per place. [2023-08-31 11:34:04,398 INFO L82 GeneralOperation]: Start removeDead. Operand has 1593 places, 1723 transitions, 4226 flow [2023-08-31 11:34:04,584 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1593 places, 1723 transitions, 4226 flow [2023-08-31 11:34:04,585 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 11:34:04,585 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1593 places, 1723 transitions, 4226 flow [2023-08-31 11:34:04,585 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1593 places, 1723 transitions, 4226 flow [2023-08-31 11:34:04,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1593 places, 1723 transitions, 4226 flow [2023-08-31 11:34:05,581 INFO L130 PetriNetUnfolder]: 209/2033 cut-off events. [2023-08-31 11:34:05,581 INFO L131 PetriNetUnfolder]: For 3250/3250 co-relation queries the response was YES. [2023-08-31 11:34:05,705 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2463 conditions, 2033 events. 209/2033 cut-off events. For 3250/3250 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 9929 event pairs, 0 based on Foata normal form. 0/1589 useless extension candidates. Maximal degree in co-relation 2339. Up to 54 conditions per place. [2023-08-31 11:34:06,260 INFO L119 LiptonReduction]: Number of co-enabled transitions 2747264 [2023-08-31 11:34:27,841 INFO L134 LiptonReduction]: Checked pairs total: 9372606 [2023-08-31 11:34:27,841 INFO L136 LiptonReduction]: Total number of compositions: 1385 [2023-08-31 11:34:27,842 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 11:34:27,843 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;@7eb31b6a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 11:34:27,843 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 11:34:28,012 INFO L130 PetriNetUnfolder]: 99/861 cut-off events. [2023-08-31 11:34:28,012 INFO L131 PetriNetUnfolder]: For 3250/3250 co-relation queries the response was YES. [2023-08-31 11:34:28,012 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 11:34:28,012 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 11:34:28,012 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 11:34:28,012 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 11:34:28,013 INFO L85 PathProgramCache]: Analyzing trace with hash -1735835522, now seen corresponding path program 1 times [2023-08-31 11:34:28,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 11:34:28,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786488446] [2023-08-31 11:34:28,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 11:34:28,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 11:34:28,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:34:28,048 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 11:34:28,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:34:28,098 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 11:34:28,098 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 11:34:28,098 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 11:34:28,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2023-08-31 11:34:28,099 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 11:34:28,099 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 11:34:28,099 WARN L233 ceAbstractionStarter]: 26 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 11:34:28,099 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 27 thread instances. [2023-08-31 11:34:28,224 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 11:34:28,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1653 places, 1788 transitions, 4413 flow [2023-08-31 11:34:29,358 INFO L130 PetriNetUnfolder]: 217/2110 cut-off events. [2023-08-31 11:34:29,358 INFO L131 PetriNetUnfolder]: For 3627/3627 co-relation queries the response was YES. [2023-08-31 11:34:29,504 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2570 conditions, 2110 events. 217/2110 cut-off events. For 3627/3627 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 10377 event pairs, 0 based on Foata normal form. 0/1649 useless extension candidates. Maximal degree in co-relation 2445. Up to 56 conditions per place. [2023-08-31 11:34:29,504 INFO L82 GeneralOperation]: Start removeDead. Operand has 1653 places, 1788 transitions, 4413 flow [2023-08-31 11:34:29,539 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1653 places, 1788 transitions, 4413 flow [2023-08-31 11:34:29,540 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 11:34:29,540 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1653 places, 1788 transitions, 4413 flow [2023-08-31 11:34:29,540 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1653 places, 1788 transitions, 4413 flow [2023-08-31 11:34:29,540 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1653 places, 1788 transitions, 4413 flow [2023-08-31 11:34:30,643 INFO L130 PetriNetUnfolder]: 217/2110 cut-off events. [2023-08-31 11:34:30,643 INFO L131 PetriNetUnfolder]: For 3627/3627 co-relation queries the response was YES. [2023-08-31 11:34:30,809 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2570 conditions, 2110 events. 217/2110 cut-off events. For 3627/3627 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 10377 event pairs, 0 based on Foata normal form. 0/1649 useless extension candidates. Maximal degree in co-relation 2445. Up to 56 conditions per place. [2023-08-31 11:34:31,674 INFO L119 LiptonReduction]: Number of co-enabled transitions 2965248 [2023-08-31 11:34:54,590 INFO L134 LiptonReduction]: Checked pairs total: 10989763 [2023-08-31 11:34:54,590 INFO L136 LiptonReduction]: Total number of compositions: 1420 [2023-08-31 11:34:54,592 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 11:34:54,592 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;@7eb31b6a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 11:34:54,592 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 11:34:54,773 INFO L130 PetriNetUnfolder]: 103/895 cut-off events. [2023-08-31 11:34:54,773 INFO L131 PetriNetUnfolder]: For 3627/3627 co-relation queries the response was YES. [2023-08-31 11:34:54,773 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 11:34:54,773 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 11:34:54,773 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 11:34:54,773 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 11:34:54,773 INFO L85 PathProgramCache]: Analyzing trace with hash 1783990667, now seen corresponding path program 1 times [2023-08-31 11:34:54,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 11:34:54,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650865098] [2023-08-31 11:34:54,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 11:34:54,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 11:34:54,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:34:54,809 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 11:34:54,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:34:54,860 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 11:34:54,861 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 11:34:54,861 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 11:34:54,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2023-08-31 11:34:54,861 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 11:34:54,862 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 11:34:54,862 WARN L233 ceAbstractionStarter]: 27 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 11:34:54,862 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 28 thread instances. [2023-08-31 11:34:54,993 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 11:34:55,000 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1713 places, 1853 transitions, 4602 flow [2023-08-31 11:34:56,335 INFO L130 PetriNetUnfolder]: 225/2187 cut-off events. [2023-08-31 11:34:56,335 INFO L131 PetriNetUnfolder]: For 4032/4032 co-relation queries the response was YES. [2023-08-31 11:34:56,472 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2678 conditions, 2187 events. 225/2187 cut-off events. For 4032/4032 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 10743 event pairs, 0 based on Foata normal form. 0/1709 useless extension candidates. Maximal degree in co-relation 2552. Up to 58 conditions per place. [2023-08-31 11:34:56,472 INFO L82 GeneralOperation]: Start removeDead. Operand has 1713 places, 1853 transitions, 4602 flow [2023-08-31 11:34:56,505 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1713 places, 1853 transitions, 4602 flow [2023-08-31 11:34:56,505 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 11:34:56,505 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1713 places, 1853 transitions, 4602 flow [2023-08-31 11:34:56,505 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1713 places, 1853 transitions, 4602 flow [2023-08-31 11:34:56,505 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1713 places, 1853 transitions, 4602 flow [2023-08-31 11:34:57,869 INFO L130 PetriNetUnfolder]: 225/2187 cut-off events. [2023-08-31 11:34:57,869 INFO L131 PetriNetUnfolder]: For 4032/4032 co-relation queries the response was YES. [2023-08-31 11:34:58,010 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2678 conditions, 2187 events. 225/2187 cut-off events. For 4032/4032 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 10743 event pairs, 0 based on Foata normal form. 0/1709 useless extension candidates. Maximal degree in co-relation 2552. Up to 58 conditions per place. [2023-08-31 11:34:58,568 INFO L119 LiptonReduction]: Number of co-enabled transitions 3191552 [2023-08-31 11:35:22,885 INFO L134 LiptonReduction]: Checked pairs total: 10793570 [2023-08-31 11:35:22,886 INFO L136 LiptonReduction]: Total number of compositions: 1479 [2023-08-31 11:35:22,887 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 11:35:22,887 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;@7eb31b6a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 11:35:22,887 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 11:35:23,091 INFO L130 PetriNetUnfolder]: 107/929 cut-off events. [2023-08-31 11:35:23,092 INFO L131 PetriNetUnfolder]: For 4032/4032 co-relation queries the response was YES. [2023-08-31 11:35:23,092 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 11:35:23,092 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 11:35:23,092 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 11:35:23,092 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 11:35:23,092 INFO L85 PathProgramCache]: Analyzing trace with hash 1219251022, now seen corresponding path program 1 times [2023-08-31 11:35:23,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 11:35:23,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741537094] [2023-08-31 11:35:23,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 11:35:23,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 11:35:23,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:35:23,127 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 11:35:23,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:35:23,180 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 11:35:23,181 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 11:35:23,181 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 11:35:23,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2023-08-31 11:35:23,181 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 11:35:23,182 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 11:35:23,182 WARN L233 ceAbstractionStarter]: 28 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 11:35:23,182 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 29 thread instances. [2023-08-31 11:35:23,322 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 11:35:23,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1773 places, 1918 transitions, 4793 flow [2023-08-31 11:35:24,674 INFO L130 PetriNetUnfolder]: 233/2264 cut-off events. [2023-08-31 11:35:24,674 INFO L131 PetriNetUnfolder]: For 4466/4466 co-relation queries the response was YES. [2023-08-31 11:35:24,835 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2787 conditions, 2264 events. 233/2264 cut-off events. For 4466/4466 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 11138 event pairs, 0 based on Foata normal form. 0/1769 useless extension candidates. Maximal degree in co-relation 2660. Up to 60 conditions per place. [2023-08-31 11:35:24,836 INFO L82 GeneralOperation]: Start removeDead. Operand has 1773 places, 1918 transitions, 4793 flow [2023-08-31 11:35:24,886 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1773 places, 1918 transitions, 4793 flow [2023-08-31 11:35:24,887 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 11:35:24,887 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1773 places, 1918 transitions, 4793 flow [2023-08-31 11:35:24,887 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1773 places, 1918 transitions, 4793 flow [2023-08-31 11:35:24,887 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1773 places, 1918 transitions, 4793 flow [2023-08-31 11:35:26,246 INFO L130 PetriNetUnfolder]: 233/2264 cut-off events. [2023-08-31 11:35:26,247 INFO L131 PetriNetUnfolder]: For 4466/4466 co-relation queries the response was YES. [2023-08-31 11:35:26,413 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2787 conditions, 2264 events. 233/2264 cut-off events. For 4466/4466 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 11138 event pairs, 0 based on Foata normal form. 0/1769 useless extension candidates. Maximal degree in co-relation 2660. Up to 60 conditions per place. [2023-08-31 11:35:27,058 INFO L119 LiptonReduction]: Number of co-enabled transitions 3426176 [2023-08-31 11:35:51,878 INFO L134 LiptonReduction]: Checked pairs total: 11607409 [2023-08-31 11:35:51,878 INFO L136 LiptonReduction]: Total number of compositions: 1532 [2023-08-31 11:35:51,880 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 11:35:51,880 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;@7eb31b6a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 11:35:51,880 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 11:35:52,133 INFO L130 PetriNetUnfolder]: 111/963 cut-off events. [2023-08-31 11:35:52,133 INFO L131 PetriNetUnfolder]: For 4466/4466 co-relation queries the response was YES. [2023-08-31 11:35:52,133 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 11:35:52,133 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 11:35:52,133 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 11:35:52,134 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 11:35:52,134 INFO L85 PathProgramCache]: Analyzing trace with hash 1906510751, now seen corresponding path program 1 times [2023-08-31 11:35:52,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 11:35:52,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154889915] [2023-08-31 11:35:52,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 11:35:52,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 11:35:52,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:35:52,170 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 11:35:52,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:35:52,224 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 11:35:52,224 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 11:35:52,224 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 11:35:52,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2023-08-31 11:35:52,225 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 11:35:52,225 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 11:35:52,225 WARN L233 ceAbstractionStarter]: 29 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 11:35:52,225 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 30 thread instances. [2023-08-31 11:35:52,370 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 11:35:52,379 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1833 places, 1983 transitions, 4986 flow [2023-08-31 11:35:53,938 INFO L130 PetriNetUnfolder]: 241/2341 cut-off events. [2023-08-31 11:35:53,938 INFO L131 PetriNetUnfolder]: For 4930/4930 co-relation queries the response was YES. [2023-08-31 11:35:54,098 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2897 conditions, 2341 events. 241/2341 cut-off events. For 4930/4930 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 11523 event pairs, 0 based on Foata normal form. 0/1829 useless extension candidates. Maximal degree in co-relation 2769. Up to 62 conditions per place. [2023-08-31 11:35:54,099 INFO L82 GeneralOperation]: Start removeDead. Operand has 1833 places, 1983 transitions, 4986 flow [2023-08-31 11:35:54,133 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1833 places, 1983 transitions, 4986 flow [2023-08-31 11:35:54,133 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 11:35:54,134 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1833 places, 1983 transitions, 4986 flow [2023-08-31 11:35:54,134 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1833 places, 1983 transitions, 4986 flow [2023-08-31 11:35:54,134 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1833 places, 1983 transitions, 4986 flow [2023-08-31 11:35:55,528 INFO L130 PetriNetUnfolder]: 241/2341 cut-off events. [2023-08-31 11:35:55,528 INFO L131 PetriNetUnfolder]: For 4930/4930 co-relation queries the response was YES. [2023-08-31 11:35:55,709 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2897 conditions, 2341 events. 241/2341 cut-off events. For 4930/4930 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 11523 event pairs, 0 based on Foata normal form. 0/1829 useless extension candidates. Maximal degree in co-relation 2769. Up to 62 conditions per place. [2023-08-31 11:35:56,516 INFO L119 LiptonReduction]: Number of co-enabled transitions 3669120 [2023-08-31 11:36:22,031 INFO L134 LiptonReduction]: Checked pairs total: 12469084 [2023-08-31 11:36:22,031 INFO L136 LiptonReduction]: Total number of compositions: 1595 [2023-08-31 11:36:22,033 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 11:36:22,034 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;@7eb31b6a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 11:36:22,034 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 11:36:22,308 INFO L130 PetriNetUnfolder]: 115/997 cut-off events. [2023-08-31 11:36:22,308 INFO L131 PetriNetUnfolder]: For 4930/4930 co-relation queries the response was YES. [2023-08-31 11:36:22,308 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 11:36:22,308 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 11:36:22,308 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 11:36:22,308 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 11:36:22,308 INFO L85 PathProgramCache]: Analyzing trace with hash -677690299, now seen corresponding path program 1 times [2023-08-31 11:36:22,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 11:36:22,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937594750] [2023-08-31 11:36:22,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 11:36:22,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 11:36:22,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:36:22,349 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 11:36:22,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:36:22,407 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 11:36:22,407 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 11:36:22,407 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 11:36:22,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2023-08-31 11:36:22,408 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 11:36:22,408 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 11:36:22,408 WARN L233 ceAbstractionStarter]: 30 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 11:36:22,408 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 31 thread instances. [2023-08-31 11:36:22,538 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 11:36:22,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1893 places, 2048 transitions, 5181 flow [2023-08-31 11:36:24,171 INFO L130 PetriNetUnfolder]: 249/2418 cut-off events. [2023-08-31 11:36:24,171 INFO L131 PetriNetUnfolder]: For 5425/5425 co-relation queries the response was YES. [2023-08-31 11:36:24,347 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3008 conditions, 2418 events. 249/2418 cut-off events. For 5425/5425 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 11908 event pairs, 0 based on Foata normal form. 0/1889 useless extension candidates. Maximal degree in co-relation 2879. Up to 64 conditions per place. [2023-08-31 11:36:24,347 INFO L82 GeneralOperation]: Start removeDead. Operand has 1893 places, 2048 transitions, 5181 flow [2023-08-31 11:36:24,404 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1893 places, 2048 transitions, 5181 flow [2023-08-31 11:36:24,404 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 11:36:24,404 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1893 places, 2048 transitions, 5181 flow [2023-08-31 11:36:24,405 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1893 places, 2048 transitions, 5181 flow [2023-08-31 11:36:24,405 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1893 places, 2048 transitions, 5181 flow [2023-08-31 11:36:26,087 INFO L130 PetriNetUnfolder]: 249/2418 cut-off events. [2023-08-31 11:36:26,088 INFO L131 PetriNetUnfolder]: For 5425/5425 co-relation queries the response was YES. [2023-08-31 11:36:26,265 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3008 conditions, 2418 events. 249/2418 cut-off events. For 5425/5425 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 11908 event pairs, 0 based on Foata normal form. 0/1889 useless extension candidates. Maximal degree in co-relation 2879. Up to 64 conditions per place. [2023-08-31 11:36:27,026 INFO L119 LiptonReduction]: Number of co-enabled transitions 3920384 [2023-08-31 11:36:54,112 INFO L134 LiptonReduction]: Checked pairs total: 13309591 [2023-08-31 11:36:54,112 INFO L136 LiptonReduction]: Total number of compositions: 1632 [2023-08-31 11:36:54,114 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 11:36:54,114 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;@7eb31b6a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 11:36:54,114 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 11:36:54,419 INFO L130 PetriNetUnfolder]: 119/1031 cut-off events. [2023-08-31 11:36:54,419 INFO L131 PetriNetUnfolder]: For 5425/5425 co-relation queries the response was YES. [2023-08-31 11:36:54,419 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 11:36:54,419 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 11:36:54,419 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 11:36:54,419 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 11:36:54,419 INFO L85 PathProgramCache]: Analyzing trace with hash -956856803, now seen corresponding path program 1 times [2023-08-31 11:36:54,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 11:36:54,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454341286] [2023-08-31 11:36:54,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 11:36:54,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 11:36:54,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:36:54,464 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 11:36:54,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:36:54,526 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 11:36:54,526 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 11:36:54,526 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 11:36:54,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2023-08-31 11:36:54,527 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 11:36:54,527 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 11:36:54,527 WARN L233 ceAbstractionStarter]: 31 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 11:36:54,527 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 32 thread instances. [2023-08-31 11:36:54,680 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 11:36:54,692 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1953 places, 2113 transitions, 5378 flow [2023-08-31 11:36:56,543 INFO L130 PetriNetUnfolder]: 257/2495 cut-off events. [2023-08-31 11:36:56,543 INFO L131 PetriNetUnfolder]: For 5952/5952 co-relation queries the response was YES. [2023-08-31 11:36:56,730 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3120 conditions, 2495 events. 257/2495 cut-off events. For 5952/5952 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 12337 event pairs, 0 based on Foata normal form. 0/1949 useless extension candidates. Maximal degree in co-relation 2990. Up to 66 conditions per place. [2023-08-31 11:36:56,730 INFO L82 GeneralOperation]: Start removeDead. Operand has 1953 places, 2113 transitions, 5378 flow [2023-08-31 11:36:56,791 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1953 places, 2113 transitions, 5378 flow [2023-08-31 11:36:56,791 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 11:36:56,791 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1953 places, 2113 transitions, 5378 flow [2023-08-31 11:36:56,792 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1953 places, 2113 transitions, 5378 flow [2023-08-31 11:36:56,792 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1953 places, 2113 transitions, 5378 flow [2023-08-31 11:36:59,006 INFO L130 PetriNetUnfolder]: 257/2495 cut-off events. [2023-08-31 11:36:59,006 INFO L131 PetriNetUnfolder]: For 5952/5952 co-relation queries the response was YES. [2023-08-31 11:36:59,315 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3120 conditions, 2495 events. 257/2495 cut-off events. For 5952/5952 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 12337 event pairs, 0 based on Foata normal form. 0/1949 useless extension candidates. Maximal degree in co-relation 2990. Up to 66 conditions per place. [2023-08-31 11:37:00,223 INFO L119 LiptonReduction]: Number of co-enabled transitions 4179968 [2023-08-31 11:37:28,718 INFO L134 LiptonReduction]: Checked pairs total: 14211562 [2023-08-31 11:37:28,718 INFO L136 LiptonReduction]: Total number of compositions: 1705 [2023-08-31 11:37:28,720 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 11:37:28,720 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;@7eb31b6a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 11:37:28,720 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 11:37:29,038 INFO L130 PetriNetUnfolder]: 123/1065 cut-off events. [2023-08-31 11:37:29,038 INFO L131 PetriNetUnfolder]: For 5952/5952 co-relation queries the response was YES. [2023-08-31 11:37:29,038 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 11:37:29,038 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 11:37:29,038 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 11:37:29,039 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 11:37:29,039 INFO L85 PathProgramCache]: Analyzing trace with hash 422411664, now seen corresponding path program 1 times [2023-08-31 11:37:29,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 11:37:29,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697585410] [2023-08-31 11:37:29,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 11:37:29,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 11:37:29,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:37:29,081 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 11:37:29,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:37:29,146 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 11:37:29,147 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 11:37:29,147 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 11:37:29,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2023-08-31 11:37:29,147 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 11:37:29,148 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 11:37:29,148 WARN L233 ceAbstractionStarter]: 32 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 11:37:29,148 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 33 thread instances. [2023-08-31 11:37:29,274 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 11:37:29,281 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2013 places, 2178 transitions, 5577 flow [2023-08-31 11:37:31,214 INFO L130 PetriNetUnfolder]: 265/2572 cut-off events. [2023-08-31 11:37:31,214 INFO L131 PetriNetUnfolder]: For 6512/6512 co-relation queries the response was YES. [2023-08-31 11:37:31,421 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3233 conditions, 2572 events. 265/2572 cut-off events. For 6512/6512 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 12720 event pairs, 0 based on Foata normal form. 0/2009 useless extension candidates. Maximal degree in co-relation 3102. Up to 68 conditions per place. [2023-08-31 11:37:31,422 INFO L82 GeneralOperation]: Start removeDead. Operand has 2013 places, 2178 transitions, 5577 flow [2023-08-31 11:37:31,466 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 2013 places, 2178 transitions, 5577 flow [2023-08-31 11:37:31,467 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 11:37:31,467 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 2013 places, 2178 transitions, 5577 flow [2023-08-31 11:37:31,467 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 2013 places, 2178 transitions, 5577 flow [2023-08-31 11:37:31,467 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2013 places, 2178 transitions, 5577 flow [2023-08-31 11:37:33,294 INFO L130 PetriNetUnfolder]: 265/2572 cut-off events. [2023-08-31 11:37:33,294 INFO L131 PetriNetUnfolder]: For 6512/6512 co-relation queries the response was YES. [2023-08-31 11:37:33,507 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3233 conditions, 2572 events. 265/2572 cut-off events. For 6512/6512 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 12720 event pairs, 0 based on Foata normal form. 0/2009 useless extension candidates. Maximal degree in co-relation 3102. Up to 68 conditions per place. [2023-08-31 11:37:34,298 INFO L119 LiptonReduction]: Number of co-enabled transitions 4447872 [2023-08-31 11:38:03,433 INFO L134 LiptonReduction]: Checked pairs total: 16497207 [2023-08-31 11:38:03,433 INFO L136 LiptonReduction]: Total number of compositions: 1742 [2023-08-31 11:38:03,435 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 11:38:03,435 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;@7eb31b6a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 11:38:03,435 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 11:38:03,769 INFO L130 PetriNetUnfolder]: 127/1099 cut-off events. [2023-08-31 11:38:03,769 INFO L131 PetriNetUnfolder]: For 6512/6512 co-relation queries the response was YES. [2023-08-31 11:38:03,769 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 11:38:03,770 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 11:38:03,770 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 11:38:03,770 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 11:38:03,770 INFO L85 PathProgramCache]: Analyzing trace with hash 497858910, now seen corresponding path program 1 times [2023-08-31 11:38:03,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 11:38:03,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261966978] [2023-08-31 11:38:03,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 11:38:03,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 11:38:03,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:38:03,809 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 11:38:03,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:38:03,878 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 11:38:03,879 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 11:38:03,879 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 11:38:03,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2023-08-31 11:38:03,879 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 11:38:03,880 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 11:38:03,880 WARN L233 ceAbstractionStarter]: 33 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 11:38:03,880 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 34 thread instances. [2023-08-31 11:38:04,014 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 11:38:04,023 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2073 places, 2243 transitions, 5778 flow [2023-08-31 11:38:06,007 INFO L130 PetriNetUnfolder]: 273/2649 cut-off events. [2023-08-31 11:38:06,007 INFO L131 PetriNetUnfolder]: For 7106/7106 co-relation queries the response was YES. [2023-08-31 11:38:06,240 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3347 conditions, 2649 events. 273/2649 cut-off events. For 7106/7106 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 13117 event pairs, 0 based on Foata normal form. 0/2069 useless extension candidates. Maximal degree in co-relation 3215. Up to 70 conditions per place. [2023-08-31 11:38:06,240 INFO L82 GeneralOperation]: Start removeDead. Operand has 2073 places, 2243 transitions, 5778 flow [2023-08-31 11:38:06,291 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 2073 places, 2243 transitions, 5778 flow [2023-08-31 11:38:06,292 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 11:38:06,292 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 2073 places, 2243 transitions, 5778 flow [2023-08-31 11:38:06,292 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 2073 places, 2243 transitions, 5778 flow [2023-08-31 11:38:06,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2073 places, 2243 transitions, 5778 flow [2023-08-31 11:38:08,369 INFO L130 PetriNetUnfolder]: 273/2649 cut-off events. [2023-08-31 11:38:08,369 INFO L131 PetriNetUnfolder]: For 7106/7106 co-relation queries the response was YES. [2023-08-31 11:38:08,587 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3347 conditions, 2649 events. 273/2649 cut-off events. For 7106/7106 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 13117 event pairs, 0 based on Foata normal form. 0/2069 useless extension candidates. Maximal degree in co-relation 3215. Up to 70 conditions per place. [2023-08-31 11:38:09,406 INFO L119 LiptonReduction]: Number of co-enabled transitions 4724096 [2023-08-31 11:38:39,917 INFO L134 LiptonReduction]: Checked pairs total: 16042268 [2023-08-31 11:38:39,917 INFO L136 LiptonReduction]: Total number of compositions: 1802 [2023-08-31 11:38:39,919 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 11:38:39,919 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;@7eb31b6a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 11:38:39,919 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 11:38:40,318 INFO L130 PetriNetUnfolder]: 131/1133 cut-off events. [2023-08-31 11:38:40,318 INFO L131 PetriNetUnfolder]: For 7106/7106 co-relation queries the response was YES. [2023-08-31 11:38:40,318 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 11:38:40,319 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 11:38:40,319 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 11:38:40,319 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 11:38:40,319 INFO L85 PathProgramCache]: Analyzing trace with hash -2037358912, now seen corresponding path program 1 times [2023-08-31 11:38:40,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 11:38:40,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771896992] [2023-08-31 11:38:40,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 11:38:40,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 11:38:40,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:38:40,372 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 11:38:40,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:38:40,445 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 11:38:40,445 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 11:38:40,446 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 11:38:40,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2023-08-31 11:38:40,446 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 11:38:40,446 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 11:38:40,446 WARN L233 ceAbstractionStarter]: 34 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 11:38:40,447 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 35 thread instances. [2023-08-31 11:38:40,586 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 11:38:40,593 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2133 places, 2308 transitions, 5981 flow [2023-08-31 11:38:42,673 INFO L130 PetriNetUnfolder]: 281/2726 cut-off events. [2023-08-31 11:38:42,674 INFO L131 PetriNetUnfolder]: For 7735/7735 co-relation queries the response was YES. [2023-08-31 11:38:42,900 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3462 conditions, 2726 events. 281/2726 cut-off events. For 7735/7735 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 13504 event pairs, 0 based on Foata normal form. 0/2129 useless extension candidates. Maximal degree in co-relation 3329. Up to 72 conditions per place. [2023-08-31 11:38:42,900 INFO L82 GeneralOperation]: Start removeDead. Operand has 2133 places, 2308 transitions, 5981 flow [2023-08-31 11:38:42,947 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 2133 places, 2308 transitions, 5981 flow [2023-08-31 11:38:42,947 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 11:38:42,948 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 2133 places, 2308 transitions, 5981 flow [2023-08-31 11:38:42,948 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 2133 places, 2308 transitions, 5981 flow [2023-08-31 11:38:42,948 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2133 places, 2308 transitions, 5981 flow [2023-08-31 11:38:45,222 INFO L130 PetriNetUnfolder]: 281/2726 cut-off events. [2023-08-31 11:38:45,223 INFO L131 PetriNetUnfolder]: For 7735/7735 co-relation queries the response was YES. [2023-08-31 11:38:45,584 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3462 conditions, 2726 events. 281/2726 cut-off events. For 7735/7735 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 13504 event pairs, 0 based on Foata normal form. 0/2129 useless extension candidates. Maximal degree in co-relation 3329. Up to 72 conditions per place. [2023-08-31 11:38:47,040 INFO L119 LiptonReduction]: Number of co-enabled transitions 5008640 [2023-08-31 11:39:19,347 INFO L134 LiptonReduction]: Checked pairs total: 17165908 [2023-08-31 11:39:19,347 INFO L136 LiptonReduction]: Total number of compositions: 1861 [2023-08-31 11:39:19,349 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 11:39:19,349 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;@7eb31b6a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 11:39:19,349 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 11:39:19,775 INFO L130 PetriNetUnfolder]: 135/1167 cut-off events. [2023-08-31 11:39:19,776 INFO L131 PetriNetUnfolder]: For 7735/7735 co-relation queries the response was YES. [2023-08-31 11:39:19,776 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 11:39:19,776 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 11:39:19,776 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 11:39:19,776 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 11:39:19,776 INFO L85 PathProgramCache]: Analyzing trace with hash 249779908, now seen corresponding path program 1 times [2023-08-31 11:39:19,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 11:39:19,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543787274] [2023-08-31 11:39:19,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 11:39:19,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 11:39:19,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:39:19,831 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 11:39:19,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:39:19,898 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 11:39:19,899 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 11:39:19,899 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 11:39:19,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2023-08-31 11:39:19,899 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 11:39:19,899 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 11:39:19,900 WARN L233 ceAbstractionStarter]: 35 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 11:39:19,900 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 36 thread instances. [2023-08-31 11:39:20,078 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 11:39:20,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2193 places, 2373 transitions, 6186 flow [2023-08-31 11:39:22,421 INFO L130 PetriNetUnfolder]: 289/2803 cut-off events. [2023-08-31 11:39:22,421 INFO L131 PetriNetUnfolder]: For 8400/8400 co-relation queries the response was YES. [2023-08-31 11:39:22,667 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3578 conditions, 2803 events. 289/2803 cut-off events. For 8400/8400 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 13928 event pairs, 0 based on Foata normal form. 0/2189 useless extension candidates. Maximal degree in co-relation 3444. Up to 74 conditions per place. [2023-08-31 11:39:22,667 INFO L82 GeneralOperation]: Start removeDead. Operand has 2193 places, 2373 transitions, 6186 flow [2023-08-31 11:39:22,717 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 2193 places, 2373 transitions, 6186 flow [2023-08-31 11:39:22,717 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 11:39:22,717 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 2193 places, 2373 transitions, 6186 flow [2023-08-31 11:39:22,717 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 2193 places, 2373 transitions, 6186 flow [2023-08-31 11:39:22,717 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2193 places, 2373 transitions, 6186 flow [2023-08-31 11:39:24,872 INFO L130 PetriNetUnfolder]: 289/2803 cut-off events. [2023-08-31 11:39:24,873 INFO L131 PetriNetUnfolder]: For 8400/8400 co-relation queries the response was YES. [2023-08-31 11:39:25,116 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3578 conditions, 2803 events. 289/2803 cut-off events. For 8400/8400 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 13928 event pairs, 0 based on Foata normal form. 0/2189 useless extension candidates. Maximal degree in co-relation 3444. Up to 74 conditions per place. [2023-08-31 11:39:26,031 INFO L119 LiptonReduction]: Number of co-enabled transitions 5301504 [2023-08-31 11:39:59,897 INFO L134 LiptonReduction]: Checked pairs total: 17993535 [2023-08-31 11:39:59,898 INFO L136 LiptonReduction]: Total number of compositions: 1900 [2023-08-31 11:39:59,899 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 11:39:59,900 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;@7eb31b6a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 11:39:59,900 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 11:40:00,379 INFO L130 PetriNetUnfolder]: 139/1201 cut-off events. [2023-08-31 11:40:00,379 INFO L131 PetriNetUnfolder]: For 8400/8400 co-relation queries the response was YES. [2023-08-31 11:40:00,379 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 11:40:00,379 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 11:40:00,380 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 11:40:00,380 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 11:40:00,380 INFO L85 PathProgramCache]: Analyzing trace with hash 766581270, now seen corresponding path program 1 times [2023-08-31 11:40:00,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 11:40:00,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041991831] [2023-08-31 11:40:00,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 11:40:00,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 11:40:00,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:40:00,426 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 11:40:00,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:40:00,483 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 11:40:00,484 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 11:40:00,484 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 11:40:00,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2023-08-31 11:40:00,484 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 11:40:00,484 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 11:40:00,485 WARN L233 ceAbstractionStarter]: 36 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 11:40:00,485 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 37 thread instances. [2023-08-31 11:40:00,660 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 11:40:00,668 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2253 places, 2438 transitions, 6393 flow [2023-08-31 11:40:03,113 INFO L130 PetriNetUnfolder]: 297/2880 cut-off events. [2023-08-31 11:40:03,113 INFO L131 PetriNetUnfolder]: For 9102/9102 co-relation queries the response was YES. [2023-08-31 11:40:03,375 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3695 conditions, 2880 events. 297/2880 cut-off events. For 9102/9102 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 14328 event pairs, 0 based on Foata normal form. 0/2249 useless extension candidates. Maximal degree in co-relation 3560. Up to 76 conditions per place. [2023-08-31 11:40:03,376 INFO L82 GeneralOperation]: Start removeDead. Operand has 2253 places, 2438 transitions, 6393 flow [2023-08-31 11:40:03,427 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 2253 places, 2438 transitions, 6393 flow [2023-08-31 11:40:03,427 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 11:40:03,427 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 2253 places, 2438 transitions, 6393 flow [2023-08-31 11:40:03,427 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 2253 places, 2438 transitions, 6393 flow [2023-08-31 11:40:03,427 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2253 places, 2438 transitions, 6393 flow [2023-08-31 11:40:05,648 INFO L130 PetriNetUnfolder]: 297/2880 cut-off events. [2023-08-31 11:40:05,648 INFO L131 PetriNetUnfolder]: For 9102/9102 co-relation queries the response was YES. [2023-08-31 11:40:05,924 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3695 conditions, 2880 events. 297/2880 cut-off events. For 9102/9102 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 14328 event pairs, 0 based on Foata normal form. 0/2249 useless extension candidates. Maximal degree in co-relation 3560. Up to 76 conditions per place. [2023-08-31 11:40:07,053 INFO L119 LiptonReduction]: Number of co-enabled transitions 5602688 Killed by 15