./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/no-data-race.prp --file ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_21-deref_read_racing.i --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --architecture 32bit -------------------------------------------------------------------------------- Checking for data races Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_21-deref_read_racing.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 cb010ae024b402436affeb854f96a5f9e0df3d8ec2cfe8b3a7f33676b7169a2c --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-31 20:49:05,198 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-31 20:49:05,200 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-31 20:49:05,241 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-31 20:49:05,243 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-31 20:49:05,246 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-31 20:49:05,248 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-31 20:49:05,250 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-31 20:49:05,252 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-31 20:49:05,256 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-31 20:49:05,257 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-31 20:49:05,258 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-31 20:49:05,258 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-31 20:49:05,260 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-31 20:49:05,261 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-31 20:49:05,265 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-31 20:49:05,267 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-31 20:49:05,268 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-31 20:49:05,269 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-31 20:49:05,271 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-31 20:49:05,277 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-31 20:49:05,281 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-31 20:49:05,282 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-31 20:49:05,283 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-31 20:49:05,288 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-31 20:49:05,291 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-31 20:49:05,291 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-31 20:49:05,292 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-31 20:49:05,294 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-31 20:49:05,294 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-31 20:49:05,295 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-31 20:49:05,297 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-31 20:49:05,299 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-31 20:49:05,300 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-31 20:49:05,301 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-31 20:49:05,301 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-31 20:49:05,302 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-31 20:49:05,302 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-31 20:49:05,303 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-31 20:49:05,303 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-31 20:49:05,304 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-31 20:49:05,305 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DataRace-32bit-Automizer_Default.epf [2023-08-31 20:49:05,338 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-31 20:49:05,339 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-31 20:49:05,340 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-31 20:49:05,340 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-31 20:49:05,341 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-31 20:49:05,341 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-31 20:49:05,341 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-31 20:49:05,342 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-31 20:49:05,342 INFO L138 SettingsManager]: * Use SBE=true [2023-08-31 20:49:05,342 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-31 20:49:05,343 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-31 20:49:05,343 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-31 20:49:05,343 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-31 20:49:05,344 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-31 20:49:05,344 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-31 20:49:05,344 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-31 20:49:05,344 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-31 20:49:05,344 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-31 20:49:05,344 INFO L138 SettingsManager]: * Check absence of data races in concurrent programs=true [2023-08-31 20:49:05,345 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-31 20:49:05,345 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-31 20:49:05,345 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-31 20:49:05,345 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-31 20:49:05,346 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-31 20:49:05,346 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-31 20:49:05,346 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-31 20:49:05,346 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 20:49:05,346 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-31 20:49:05,347 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-31 20:49:05,347 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-31 20:49:05,347 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-31 20:49:05,347 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-31 20:49:05,347 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-31 20:49:05,348 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-31 20:49:05,348 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-31 20:49:05,348 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-31 20:49:05,348 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-31 20:49:05,348 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! data-race) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cb010ae024b402436affeb854f96a5f9e0df3d8ec2cfe8b3a7f33676b7169a2c Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-08-31 20:49:05,674 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-31 20:49:05,693 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-31 20:49:05,695 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-31 20:49:05,696 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-31 20:49:05,697 INFO L275 PluginConnector]: CDTParser initialized [2023-08-31 20:49:05,698 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_21-deref_read_racing.i [2023-08-31 20:49:06,769 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-31 20:49:07,083 INFO L351 CDTParser]: Found 1 translation units. [2023-08-31 20:49:07,083 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_21-deref_read_racing.i [2023-08-31 20:49:07,100 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/120a2a91b/57dff4e4b7d64913b2439cb55c4c87e5/FLAG44cc4fca8 [2023-08-31 20:49:07,110 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/120a2a91b/57dff4e4b7d64913b2439cb55c4c87e5 [2023-08-31 20:49:07,112 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-31 20:49:07,113 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-31 20:49:07,114 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-31 20:49:07,115 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-31 20:49:07,117 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-31 20:49:07,118 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 08:49:07" (1/1) ... [2023-08-31 20:49:07,119 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@64fbe05e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 08:49:07, skipping insertion in model container [2023-08-31 20:49:07,119 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 08:49:07" (1/1) ... [2023-08-31 20:49:07,123 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-31 20:49:07,162 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-31 20:49:07,375 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_21-deref_read_racing.i[30176,30189] [2023-08-31 20:49:07,404 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 20:49:07,420 INFO L203 MainTranslator]: Completed pre-run [2023-08-31 20:49:07,461 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_21-deref_read_racing.i[30176,30189] [2023-08-31 20:49:07,469 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 20:49:07,554 INFO L208 MainTranslator]: Completed translation [2023-08-31 20:49:07,565 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 08:49:07 WrapperNode [2023-08-31 20:49:07,565 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-31 20:49:07,567 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-31 20:49:07,567 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-31 20:49:07,567 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-31 20:49:07,573 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 08:49:07" (1/1) ... [2023-08-31 20:49:07,594 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 08:49:07" (1/1) ... [2023-08-31 20:49:07,611 INFO L138 Inliner]: procedures = 170, calls = 35, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 78 [2023-08-31 20:49:07,611 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-31 20:49:07,612 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-31 20:49:07,612 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-31 20:49:07,612 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-31 20:49:07,619 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 08:49:07" (1/1) ... [2023-08-31 20:49:07,620 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 08:49:07" (1/1) ... [2023-08-31 20:49:07,622 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 08:49:07" (1/1) ... [2023-08-31 20:49:07,623 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 08:49:07" (1/1) ... [2023-08-31 20:49:07,638 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 08:49:07" (1/1) ... [2023-08-31 20:49:07,641 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 08:49:07" (1/1) ... [2023-08-31 20:49:07,642 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 08:49:07" (1/1) ... [2023-08-31 20:49:07,643 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 08:49:07" (1/1) ... [2023-08-31 20:49:07,645 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-31 20:49:07,646 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-31 20:49:07,654 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-31 20:49:07,654 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-31 20:49:07,655 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 08:49:07" (1/1) ... [2023-08-31 20:49:07,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 20:49:07,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 20:49:07,684 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-31 20:49:07,692 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-31 20:49:07,712 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-31 20:49:07,713 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-31 20:49:07,715 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-31 20:49:07,715 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-31 20:49:07,715 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-31 20:49:07,716 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-08-31 20:49:07,716 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-08-31 20:49:07,716 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-31 20:49:07,716 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-31 20:49:07,716 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-31 20:49:07,717 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-31 20:49:07,718 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-31 20:49:07,836 INFO L236 CfgBuilder]: Building ICFG [2023-08-31 20:49:07,838 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-31 20:49:08,104 INFO L277 CfgBuilder]: Performing block encoding [2023-08-31 20:49:08,111 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-31 20:49:08,114 INFO L302 CfgBuilder]: Removed 9 assume(true) statements. [2023-08-31 20:49:08,117 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 08:49:08 BoogieIcfgContainer [2023-08-31 20:49:08,118 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-31 20:49:08,120 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-31 20:49:08,120 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-31 20:49:08,122 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-31 20:49:08,123 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.08 08:49:07" (1/3) ... [2023-08-31 20:49:08,123 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d6ba674 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 08:49:08, skipping insertion in model container [2023-08-31 20:49:08,123 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 08:49:07" (2/3) ... [2023-08-31 20:49:08,124 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d6ba674 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 08:49:08, skipping insertion in model container [2023-08-31 20:49:08,124 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 08:49:08" (3/3) ... [2023-08-31 20:49:08,125 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_21-deref_read_racing.i [2023-08-31 20:49:08,133 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-31 20:49:08,141 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-31 20:49:08,141 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2023-08-31 20:49:08,141 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-31 20:49:08,256 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 20:49:08,300 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 140 places, 147 transitions, 299 flow [2023-08-31 20:49:08,390 INFO L130 PetriNetUnfolder]: 14/191 cut-off events. [2023-08-31 20:49:08,391 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-31 20:49:08,397 INFO L83 FinitePrefix]: Finished finitePrefix Result has 196 conditions, 191 events. 14/191 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 528 event pairs, 0 based on Foata normal form. 0/161 useless extension candidates. Maximal degree in co-relation 115. Up to 4 conditions per place. [2023-08-31 20:49:08,398 INFO L82 GeneralOperation]: Start removeDead. Operand has 140 places, 147 transitions, 299 flow [2023-08-31 20:49:08,405 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 140 places, 147 transitions, 299 flow [2023-08-31 20:49:08,408 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 20:49:08,426 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 140 places, 147 transitions, 299 flow [2023-08-31 20:49:08,431 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 140 places, 147 transitions, 299 flow [2023-08-31 20:49:08,431 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 140 places, 147 transitions, 299 flow [2023-08-31 20:49:08,479 INFO L130 PetriNetUnfolder]: 14/191 cut-off events. [2023-08-31 20:49:08,479 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-31 20:49:08,482 INFO L83 FinitePrefix]: Finished finitePrefix Result has 196 conditions, 191 events. 14/191 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 528 event pairs, 0 based on Foata normal form. 0/161 useless extension candidates. Maximal degree in co-relation 115. Up to 4 conditions per place. [2023-08-31 20:49:08,486 INFO L119 LiptonReduction]: Number of co-enabled transitions 6600 [2023-08-31 20:49:11,167 INFO L134 LiptonReduction]: Checked pairs total: 25247 [2023-08-31 20:49:11,168 INFO L136 LiptonReduction]: Total number of compositions: 98 [2023-08-31 20:49:11,187 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 20:49:11,194 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;@25a23cca, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 20:49:11,195 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 20:49:11,204 INFO L130 PetriNetUnfolder]: 0/23 cut-off events. [2023-08-31 20:49:11,204 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-31 20:49:11,205 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 20:49:11,205 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-31 20:49:11,206 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 20:49:11,210 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 20:49:11,211 INFO L85 PathProgramCache]: Analyzing trace with hash -1471187631, now seen corresponding path program 1 times [2023-08-31 20:49:11,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 20:49:11,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499531145] [2023-08-31 20:49:11,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 20:49:11,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 20:49:11,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 20:49:11,351 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 20:49:11,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 20:49:11,417 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 20:49:11,420 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 20:49:11,421 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 20:49:11,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-31 20:49:11,424 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 20:49:11,427 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 20:49:11,428 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 20:49:11,428 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-31 20:49:11,471 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 20:49:11,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 203 places, 214 transitions, 440 flow [2023-08-31 20:49:11,557 INFO L130 PetriNetUnfolder]: 24/307 cut-off events. [2023-08-31 20:49:11,557 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-31 20:49:11,563 INFO L83 FinitePrefix]: Finished finitePrefix Result has 317 conditions, 307 events. 24/307 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1129 event pairs, 0 based on Foata normal form. 0/256 useless extension candidates. Maximal degree in co-relation 192. Up to 6 conditions per place. [2023-08-31 20:49:11,563 INFO L82 GeneralOperation]: Start removeDead. Operand has 203 places, 214 transitions, 440 flow [2023-08-31 20:49:11,567 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 203 places, 214 transitions, 440 flow [2023-08-31 20:49:11,567 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 20:49:11,567 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 203 places, 214 transitions, 440 flow [2023-08-31 20:49:11,568 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 203 places, 214 transitions, 440 flow [2023-08-31 20:49:11,568 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 203 places, 214 transitions, 440 flow [2023-08-31 20:49:11,623 INFO L130 PetriNetUnfolder]: 24/307 cut-off events. [2023-08-31 20:49:11,623 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-31 20:49:11,626 INFO L83 FinitePrefix]: Finished finitePrefix Result has 317 conditions, 307 events. 24/307 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1129 event pairs, 0 based on Foata normal form. 0/256 useless extension candidates. Maximal degree in co-relation 192. Up to 6 conditions per place. [2023-08-31 20:49:11,640 INFO L119 LiptonReduction]: Number of co-enabled transitions 22044 [2023-08-31 20:49:14,373 INFO L134 LiptonReduction]: Checked pairs total: 105292 [2023-08-31 20:49:14,373 INFO L136 LiptonReduction]: Total number of compositions: 122 [2023-08-31 20:49:14,375 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 20:49:14,376 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;@25a23cca, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 20:49:14,377 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 20:49:14,382 INFO L130 PetriNetUnfolder]: 4/63 cut-off events. [2023-08-31 20:49:14,383 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-31 20:49:14,383 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 20:49:14,383 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-31 20:49:14,383 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 20:49:14,384 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 20:49:14,384 INFO L85 PathProgramCache]: Analyzing trace with hash 74766718, now seen corresponding path program 1 times [2023-08-31 20:49:14,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 20:49:14,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796336639] [2023-08-31 20:49:14,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 20:49:14,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 20:49:14,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 20:49:14,411 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 20:49:14,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 20:49:14,432 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 20:49:14,433 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 20:49:14,433 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 20:49:14,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-31 20:49:14,434 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 20:49:14,434 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 20:49:14,434 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 20:49:14,435 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-31 20:49:14,462 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 20:49:14,465 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 266 places, 281 transitions, 583 flow [2023-08-31 20:49:14,527 INFO L130 PetriNetUnfolder]: 34/423 cut-off events. [2023-08-31 20:49:14,527 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-31 20:49:14,532 INFO L83 FinitePrefix]: Finished finitePrefix Result has 439 conditions, 423 events. 34/423 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1770 event pairs, 0 based on Foata normal form. 0/351 useless extension candidates. Maximal degree in co-relation 311. Up to 8 conditions per place. [2023-08-31 20:49:14,532 INFO L82 GeneralOperation]: Start removeDead. Operand has 266 places, 281 transitions, 583 flow [2023-08-31 20:49:14,535 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 266 places, 281 transitions, 583 flow [2023-08-31 20:49:14,536 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 20:49:14,536 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 266 places, 281 transitions, 583 flow [2023-08-31 20:49:14,536 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 266 places, 281 transitions, 583 flow [2023-08-31 20:49:14,536 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 266 places, 281 transitions, 583 flow [2023-08-31 20:49:14,593 INFO L130 PetriNetUnfolder]: 34/423 cut-off events. [2023-08-31 20:49:14,593 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-31 20:49:14,599 INFO L83 FinitePrefix]: Finished finitePrefix Result has 439 conditions, 423 events. 34/423 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1770 event pairs, 0 based on Foata normal form. 0/351 useless extension candidates. Maximal degree in co-relation 311. Up to 8 conditions per place. [2023-08-31 20:49:14,616 INFO L119 LiptonReduction]: Number of co-enabled transitions 46332 [2023-08-31 20:49:17,471 INFO L134 LiptonReduction]: Checked pairs total: 241597 [2023-08-31 20:49:17,472 INFO L136 LiptonReduction]: Total number of compositions: 146 [2023-08-31 20:49:17,474 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 20:49:17,475 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;@25a23cca, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 20:49:17,475 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 20:49:17,483 INFO L130 PetriNetUnfolder]: 8/110 cut-off events. [2023-08-31 20:49:17,484 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-31 20:49:17,484 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 20:49:17,484 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-08-31 20:49:17,484 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 20:49:17,485 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 20:49:17,485 INFO L85 PathProgramCache]: Analyzing trace with hash 218955956, now seen corresponding path program 1 times [2023-08-31 20:49:17,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 20:49:17,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534566520] [2023-08-31 20:49:17,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 20:49:17,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 20:49:17,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 20:49:17,510 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 20:49:17,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 20:49:17,529 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 20:49:17,529 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 20:49:17,529 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 20:49:17,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-31 20:49:17,529 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 20:49:17,530 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 20:49:17,530 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 20:49:17,530 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-08-31 20:49:17,557 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 20:49:17,560 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 329 places, 348 transitions, 728 flow [2023-08-31 20:49:17,660 INFO L130 PetriNetUnfolder]: 44/539 cut-off events. [2023-08-31 20:49:17,660 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-08-31 20:49:17,669 INFO L83 FinitePrefix]: Finished finitePrefix Result has 562 conditions, 539 events. 44/539 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 2416 event pairs, 0 based on Foata normal form. 0/446 useless extension candidates. Maximal degree in co-relation 431. Up to 10 conditions per place. [2023-08-31 20:49:17,669 INFO L82 GeneralOperation]: Start removeDead. Operand has 329 places, 348 transitions, 728 flow [2023-08-31 20:49:17,677 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 329 places, 348 transitions, 728 flow [2023-08-31 20:49:17,677 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 20:49:17,677 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 329 places, 348 transitions, 728 flow [2023-08-31 20:49:17,678 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 329 places, 348 transitions, 728 flow [2023-08-31 20:49:17,678 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 329 places, 348 transitions, 728 flow [2023-08-31 20:49:17,763 INFO L130 PetriNetUnfolder]: 44/539 cut-off events. [2023-08-31 20:49:17,763 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-08-31 20:49:17,773 INFO L83 FinitePrefix]: Finished finitePrefix Result has 562 conditions, 539 events. 44/539 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 2416 event pairs, 0 based on Foata normal form. 0/446 useless extension candidates. Maximal degree in co-relation 431. Up to 10 conditions per place. [2023-08-31 20:49:17,809 INFO L119 LiptonReduction]: Number of co-enabled transitions 79464 [2023-08-31 20:49:20,656 INFO L134 LiptonReduction]: Checked pairs total: 431893 [2023-08-31 20:49:20,657 INFO L136 LiptonReduction]: Total number of compositions: 167 [2023-08-31 20:49:20,659 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 20:49:20,660 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;@25a23cca, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 20:49:20,660 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 20:49:20,674 INFO L130 PetriNetUnfolder]: 12/166 cut-off events. [2023-08-31 20:49:20,674 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-08-31 20:49:20,674 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 20:49:20,674 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2023-08-31 20:49:20,675 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 20:49:20,675 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 20:49:20,675 INFO L85 PathProgramCache]: Analyzing trace with hash 1661968801, now seen corresponding path program 1 times [2023-08-31 20:49:20,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 20:49:20,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163668905] [2023-08-31 20:49:20,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 20:49:20,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 20:49:20,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 20:49:20,696 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 20:49:20,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 20:49:20,715 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 20:49:20,715 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 20:49:20,715 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 20:49:20,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-31 20:49:20,715 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 20:49:20,716 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 20:49:20,716 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 20:49:20,716 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-08-31 20:49:20,745 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 20:49:20,748 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 392 places, 415 transitions, 875 flow [2023-08-31 20:49:20,878 INFO L130 PetriNetUnfolder]: 54/655 cut-off events. [2023-08-31 20:49:20,879 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-08-31 20:49:20,893 INFO L83 FinitePrefix]: Finished finitePrefix Result has 686 conditions, 655 events. 54/655 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 3047 event pairs, 0 based on Foata normal form. 0/541 useless extension candidates. Maximal degree in co-relation 552. Up to 12 conditions per place. [2023-08-31 20:49:20,893 INFO L82 GeneralOperation]: Start removeDead. Operand has 392 places, 415 transitions, 875 flow [2023-08-31 20:49:20,899 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 392 places, 415 transitions, 875 flow [2023-08-31 20:49:20,899 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 20:49:20,899 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 392 places, 415 transitions, 875 flow [2023-08-31 20:49:20,900 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 392 places, 415 transitions, 875 flow [2023-08-31 20:49:20,900 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 392 places, 415 transitions, 875 flow [2023-08-31 20:49:21,032 INFO L130 PetriNetUnfolder]: 54/655 cut-off events. [2023-08-31 20:49:21,033 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-08-31 20:49:21,048 INFO L83 FinitePrefix]: Finished finitePrefix Result has 686 conditions, 655 events. 54/655 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 3047 event pairs, 0 based on Foata normal form. 0/541 useless extension candidates. Maximal degree in co-relation 552. Up to 12 conditions per place. [2023-08-31 20:49:21,082 INFO L119 LiptonReduction]: Number of co-enabled transitions 121440 [2023-08-31 20:49:24,364 INFO L134 LiptonReduction]: Checked pairs total: 769510 [2023-08-31 20:49:24,364 INFO L136 LiptonReduction]: Total number of compositions: 195 [2023-08-31 20:49:24,366 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 20:49:24,367 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;@25a23cca, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 20:49:24,367 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 20:49:24,390 INFO L130 PetriNetUnfolder]: 20/233 cut-off events. [2023-08-31 20:49:24,390 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-08-31 20:49:24,391 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 20:49:24,391 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 20:49:24,391 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 20:49:24,391 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 20:49:24,392 INFO L85 PathProgramCache]: Analyzing trace with hash -1347006693, now seen corresponding path program 1 times [2023-08-31 20:49:24,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 20:49:24,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632479056] [2023-08-31 20:49:24,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 20:49:24,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 20:49:24,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 20:49:24,413 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 20:49:24,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 20:49:24,432 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 20:49:24,432 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 20:49:24,433 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 20:49:24,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-31 20:49:24,433 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 20:49:24,433 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 20:49:24,434 WARN L233 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 20:49:24,434 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2023-08-31 20:49:24,464 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 20:49:24,468 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 455 places, 482 transitions, 1024 flow [2023-08-31 20:49:24,638 INFO L130 PetriNetUnfolder]: 64/771 cut-off events. [2023-08-31 20:49:24,638 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2023-08-31 20:49:24,661 INFO L83 FinitePrefix]: Finished finitePrefix Result has 811 conditions, 771 events. 64/771 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 3672 event pairs, 0 based on Foata normal form. 0/636 useless extension candidates. Maximal degree in co-relation 674. Up to 14 conditions per place. [2023-08-31 20:49:24,661 INFO L82 GeneralOperation]: Start removeDead. Operand has 455 places, 482 transitions, 1024 flow [2023-08-31 20:49:24,671 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 455 places, 482 transitions, 1024 flow [2023-08-31 20:49:24,675 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 20:49:24,676 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 455 places, 482 transitions, 1024 flow [2023-08-31 20:49:24,676 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 455 places, 482 transitions, 1024 flow [2023-08-31 20:49:24,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 455 places, 482 transitions, 1024 flow [2023-08-31 20:49:24,833 INFO L130 PetriNetUnfolder]: 64/771 cut-off events. [2023-08-31 20:49:24,834 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2023-08-31 20:49:24,855 INFO L83 FinitePrefix]: Finished finitePrefix Result has 811 conditions, 771 events. 64/771 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 3672 event pairs, 0 based on Foata normal form. 0/636 useless extension candidates. Maximal degree in co-relation 674. Up to 14 conditions per place. [2023-08-31 20:49:24,899 INFO L119 LiptonReduction]: Number of co-enabled transitions 172260 [2023-08-31 20:49:28,094 INFO L134 LiptonReduction]: Checked pairs total: 987936 [2023-08-31 20:49:28,094 INFO L136 LiptonReduction]: Total number of compositions: 215 [2023-08-31 20:49:28,096 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 20:49:28,096 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;@25a23cca, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 20:49:28,097 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 20:49:28,129 INFO L130 PetriNetUnfolder]: 28/300 cut-off events. [2023-08-31 20:49:28,130 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2023-08-31 20:49:28,130 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 20:49:28,130 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 20:49:28,130 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 20:49:28,131 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 20:49:28,131 INFO L85 PathProgramCache]: Analyzing trace with hash 582394498, now seen corresponding path program 1 times [2023-08-31 20:49:28,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 20:49:28,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585716273] [2023-08-31 20:49:28,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 20:49:28,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 20:49:28,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 20:49:28,168 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 20:49:28,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 20:49:28,207 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 20:49:28,207 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 20:49:28,209 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 20:49:28,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-31 20:49:28,209 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 20:49:28,213 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 20:49:28,213 WARN L233 ceAbstractionStarter]: 6 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 20:49:28,213 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 7 thread instances. [2023-08-31 20:49:28,251 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 20:49:28,254 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 518 places, 549 transitions, 1175 flow [2023-08-31 20:49:28,471 INFO L130 PetriNetUnfolder]: 74/887 cut-off events. [2023-08-31 20:49:28,472 INFO L131 PetriNetUnfolder]: For 77/77 co-relation queries the response was YES. [2023-08-31 20:49:28,495 INFO L83 FinitePrefix]: Finished finitePrefix Result has 937 conditions, 887 events. 74/887 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 4328 event pairs, 0 based on Foata normal form. 0/731 useless extension candidates. Maximal degree in co-relation 797. Up to 16 conditions per place. [2023-08-31 20:49:28,496 INFO L82 GeneralOperation]: Start removeDead. Operand has 518 places, 549 transitions, 1175 flow [2023-08-31 20:49:28,503 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 518 places, 549 transitions, 1175 flow [2023-08-31 20:49:28,503 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 20:49:28,503 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 518 places, 549 transitions, 1175 flow [2023-08-31 20:49:28,503 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 518 places, 549 transitions, 1175 flow [2023-08-31 20:49:28,504 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 518 places, 549 transitions, 1175 flow [2023-08-31 20:49:28,726 INFO L130 PetriNetUnfolder]: 74/887 cut-off events. [2023-08-31 20:49:28,727 INFO L131 PetriNetUnfolder]: For 77/77 co-relation queries the response was YES. [2023-08-31 20:49:28,749 INFO L83 FinitePrefix]: Finished finitePrefix Result has 937 conditions, 887 events. 74/887 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 4328 event pairs, 0 based on Foata normal form. 0/731 useless extension candidates. Maximal degree in co-relation 797. Up to 16 conditions per place. [2023-08-31 20:49:28,808 INFO L119 LiptonReduction]: Number of co-enabled transitions 231924 [2023-08-31 20:49:32,419 INFO L134 LiptonReduction]: Checked pairs total: 1349788 [2023-08-31 20:49:32,420 INFO L136 LiptonReduction]: Total number of compositions: 242 [2023-08-31 20:49:32,421 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 20:49:32,422 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;@25a23cca, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 20:49:32,422 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 20:49:32,468 INFO L130 PetriNetUnfolder]: 36/367 cut-off events. [2023-08-31 20:49:32,468 INFO L131 PetriNetUnfolder]: For 77/77 co-relation queries the response was YES. [2023-08-31 20:49:32,468 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 20:49:32,468 INFO L208 CegarLoopForPetriNet]: trace histogram [8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 20:49:32,469 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 20:49:32,469 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 20:49:32,469 INFO L85 PathProgramCache]: Analyzing trace with hash -2123707458, now seen corresponding path program 1 times [2023-08-31 20:49:32,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 20:49:32,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110757311] [2023-08-31 20:49:32,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 20:49:32,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 20:49:32,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 20:49:32,511 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 20:49:32,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 20:49:32,544 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 20:49:32,551 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 20:49:32,552 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 20:49:32,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-31 20:49:32,552 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 20:49:32,553 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 20:49:32,553 WARN L233 ceAbstractionStarter]: 7 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 20:49:32,553 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 8 thread instances. [2023-08-31 20:49:32,621 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 20:49:32,625 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 581 places, 616 transitions, 1328 flow [2023-08-31 20:49:32,860 INFO L130 PetriNetUnfolder]: 84/1003 cut-off events. [2023-08-31 20:49:32,861 INFO L131 PetriNetUnfolder]: For 112/112 co-relation queries the response was YES. [2023-08-31 20:49:32,899 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1064 conditions, 1003 events. 84/1003 cut-off events. For 112/112 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 4959 event pairs, 0 based on Foata normal form. 0/826 useless extension candidates. Maximal degree in co-relation 921. Up to 18 conditions per place. [2023-08-31 20:49:32,900 INFO L82 GeneralOperation]: Start removeDead. Operand has 581 places, 616 transitions, 1328 flow [2023-08-31 20:49:32,910 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 581 places, 616 transitions, 1328 flow [2023-08-31 20:49:32,911 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 20:49:32,911 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 581 places, 616 transitions, 1328 flow [2023-08-31 20:49:32,911 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 581 places, 616 transitions, 1328 flow [2023-08-31 20:49:32,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 581 places, 616 transitions, 1328 flow [2023-08-31 20:49:33,164 INFO L130 PetriNetUnfolder]: 84/1003 cut-off events. [2023-08-31 20:49:33,165 INFO L131 PetriNetUnfolder]: For 112/112 co-relation queries the response was YES. [2023-08-31 20:49:33,203 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1064 conditions, 1003 events. 84/1003 cut-off events. For 112/112 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 4959 event pairs, 0 based on Foata normal form. 0/826 useless extension candidates. Maximal degree in co-relation 921. Up to 18 conditions per place. [2023-08-31 20:49:33,319 INFO L119 LiptonReduction]: Number of co-enabled transitions 300432 [2023-08-31 20:49:36,988 INFO L134 LiptonReduction]: Checked pairs total: 1762493 [2023-08-31 20:49:36,989 INFO L136 LiptonReduction]: Total number of compositions: 268 [2023-08-31 20:49:36,990 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 20:49:36,991 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;@25a23cca, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 20:49:36,991 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 20:49:37,064 INFO L130 PetriNetUnfolder]: 44/434 cut-off events. [2023-08-31 20:49:37,064 INFO L131 PetriNetUnfolder]: For 112/112 co-relation queries the response was YES. [2023-08-31 20:49:37,064 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 20:49:37,065 INFO L208 CegarLoopForPetriNet]: trace histogram [9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 20:49:37,065 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 20:49:37,065 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 20:49:37,065 INFO L85 PathProgramCache]: Analyzing trace with hash 1800582232, now seen corresponding path program 1 times [2023-08-31 20:49:37,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 20:49:37,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617940898] [2023-08-31 20:49:37,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 20:49:37,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 20:49:37,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 20:49:37,104 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 20:49:37,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 20:49:37,141 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 20:49:37,149 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 20:49:37,149 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 20:49:37,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-31 20:49:37,150 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 20:49:37,152 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 20:49:37,152 WARN L233 ceAbstractionStarter]: 8 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 20:49:37,155 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 9 thread instances. [2023-08-31 20:49:37,208 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 20:49:37,213 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 644 places, 683 transitions, 1483 flow [2023-08-31 20:49:37,561 INFO L130 PetriNetUnfolder]: 94/1119 cut-off events. [2023-08-31 20:49:37,561 INFO L131 PetriNetUnfolder]: For 156/156 co-relation queries the response was YES. [2023-08-31 20:49:37,594 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1192 conditions, 1119 events. 94/1119 cut-off events. For 156/156 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 5604 event pairs, 0 based on Foata normal form. 0/921 useless extension candidates. Maximal degree in co-relation 1046. Up to 20 conditions per place. [2023-08-31 20:49:37,595 INFO L82 GeneralOperation]: Start removeDead. Operand has 644 places, 683 transitions, 1483 flow [2023-08-31 20:49:37,605 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 644 places, 683 transitions, 1483 flow [2023-08-31 20:49:37,606 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 20:49:37,606 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 644 places, 683 transitions, 1483 flow [2023-08-31 20:49:37,606 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 644 places, 683 transitions, 1483 flow [2023-08-31 20:49:37,607 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 644 places, 683 transitions, 1483 flow [2023-08-31 20:49:37,902 INFO L130 PetriNetUnfolder]: 94/1119 cut-off events. [2023-08-31 20:49:37,902 INFO L131 PetriNetUnfolder]: For 156/156 co-relation queries the response was YES. [2023-08-31 20:49:37,940 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1192 conditions, 1119 events. 94/1119 cut-off events. For 156/156 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 5604 event pairs, 0 based on Foata normal form. 0/921 useless extension candidates. Maximal degree in co-relation 1046. Up to 20 conditions per place. [2023-08-31 20:49:38,066 INFO L119 LiptonReduction]: Number of co-enabled transitions 377784 [2023-08-31 20:49:42,088 INFO L134 LiptonReduction]: Checked pairs total: 2230400 [2023-08-31 20:49:42,088 INFO L136 LiptonReduction]: Total number of compositions: 286 [2023-08-31 20:49:42,090 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 20:49:42,090 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;@25a23cca, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 20:49:42,091 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 20:49:42,156 INFO L130 PetriNetUnfolder]: 52/501 cut-off events. [2023-08-31 20:49:42,157 INFO L131 PetriNetUnfolder]: For 156/156 co-relation queries the response was YES. [2023-08-31 20:49:42,157 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 20:49:42,157 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 20:49:42,157 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 20:49:42,157 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 20:49:42,158 INFO L85 PathProgramCache]: Analyzing trace with hash -1256584608, now seen corresponding path program 1 times [2023-08-31 20:49:42,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 20:49:42,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031616210] [2023-08-31 20:49:42,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 20:49:42,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 20:49:42,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 20:49:42,177 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 20:49:42,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 20:49:42,198 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 20:49:42,198 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 20:49:42,198 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 20:49:42,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-31 20:49:42,199 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 20:49:42,199 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 20:49:42,199 WARN L233 ceAbstractionStarter]: 9 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 20:49:42,199 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 10 thread instances. [2023-08-31 20:49:42,248 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 20:49:42,252 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 707 places, 750 transitions, 1640 flow [2023-08-31 20:49:42,700 INFO L130 PetriNetUnfolder]: 104/1235 cut-off events. [2023-08-31 20:49:42,700 INFO L131 PetriNetUnfolder]: For 210/210 co-relation queries the response was YES. [2023-08-31 20:49:42,758 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1321 conditions, 1235 events. 104/1235 cut-off events. For 210/210 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 6238 event pairs, 0 based on Foata normal form. 0/1016 useless extension candidates. Maximal degree in co-relation 1172. Up to 22 conditions per place. [2023-08-31 20:49:42,758 INFO L82 GeneralOperation]: Start removeDead. Operand has 707 places, 750 transitions, 1640 flow [2023-08-31 20:49:42,768 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 707 places, 750 transitions, 1640 flow [2023-08-31 20:49:42,768 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 20:49:42,769 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 707 places, 750 transitions, 1640 flow [2023-08-31 20:49:42,769 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 707 places, 750 transitions, 1640 flow [2023-08-31 20:49:42,769 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 707 places, 750 transitions, 1640 flow [2023-08-31 20:49:43,138 INFO L130 PetriNetUnfolder]: 104/1235 cut-off events. [2023-08-31 20:49:43,138 INFO L131 PetriNetUnfolder]: For 210/210 co-relation queries the response was YES. [2023-08-31 20:49:43,167 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1321 conditions, 1235 events. 104/1235 cut-off events. For 210/210 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 6238 event pairs, 0 based on Foata normal form. 0/1016 useless extension candidates. Maximal degree in co-relation 1172. Up to 22 conditions per place. [2023-08-31 20:49:43,246 INFO L119 LiptonReduction]: Number of co-enabled transitions 463980 [2023-08-31 20:49:47,546 INFO L134 LiptonReduction]: Checked pairs total: 2756596 [2023-08-31 20:49:47,546 INFO L136 LiptonReduction]: Total number of compositions: 308 [2023-08-31 20:49:47,548 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 20:49:47,548 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;@25a23cca, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 20:49:47,548 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 20:49:47,663 INFO L130 PetriNetUnfolder]: 60/568 cut-off events. [2023-08-31 20:49:47,663 INFO L131 PetriNetUnfolder]: For 210/210 co-relation queries the response was YES. [2023-08-31 20:49:47,664 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 20:49:47,664 INFO L208 CegarLoopForPetriNet]: trace histogram [11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 20:49:47,664 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 20:49:47,665 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 20:49:47,665 INFO L85 PathProgramCache]: Analyzing trace with hash -1063197097, now seen corresponding path program 1 times [2023-08-31 20:49:47,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 20:49:47,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788080890] [2023-08-31 20:49:47,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 20:49:47,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 20:49:47,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 20:49:47,687 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 20:49:47,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 20:49:47,727 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 20:49:47,727 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 20:49:47,727 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 20:49:47,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-31 20:49:47,728 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 20:49:47,728 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 20:49:47,729 WARN L233 ceAbstractionStarter]: 10 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 20:49:47,729 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 11 thread instances. [2023-08-31 20:49:47,778 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 20:49:47,782 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 770 places, 817 transitions, 1799 flow [2023-08-31 20:49:48,180 INFO L130 PetriNetUnfolder]: 114/1351 cut-off events. [2023-08-31 20:49:48,180 INFO L131 PetriNetUnfolder]: For 275/275 co-relation queries the response was YES. [2023-08-31 20:49:48,252 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1451 conditions, 1351 events. 114/1351 cut-off events. For 275/275 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 6888 event pairs, 0 based on Foata normal form. 0/1111 useless extension candidates. Maximal degree in co-relation 1299. Up to 24 conditions per place. [2023-08-31 20:49:48,253 INFO L82 GeneralOperation]: Start removeDead. Operand has 770 places, 817 transitions, 1799 flow [2023-08-31 20:49:48,265 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 770 places, 817 transitions, 1799 flow [2023-08-31 20:49:48,265 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 20:49:48,265 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 770 places, 817 transitions, 1799 flow [2023-08-31 20:49:48,266 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 770 places, 817 transitions, 1799 flow [2023-08-31 20:49:48,266 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 770 places, 817 transitions, 1799 flow [2023-08-31 20:49:48,664 INFO L130 PetriNetUnfolder]: 114/1351 cut-off events. [2023-08-31 20:49:48,664 INFO L131 PetriNetUnfolder]: For 275/275 co-relation queries the response was YES. [2023-08-31 20:49:48,719 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1451 conditions, 1351 events. 114/1351 cut-off events. For 275/275 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 6888 event pairs, 0 based on Foata normal form. 0/1111 useless extension candidates. Maximal degree in co-relation 1299. Up to 24 conditions per place. [2023-08-31 20:49:48,844 INFO L119 LiptonReduction]: Number of co-enabled transitions 559020 [2023-08-31 20:49:53,465 INFO L134 LiptonReduction]: Checked pairs total: 3782943 [2023-08-31 20:49:53,466 INFO L136 LiptonReduction]: Total number of compositions: 339 [2023-08-31 20:49:53,467 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 20:49:53,467 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@25a23cca, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 20:49:53,467 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 20:49:53,572 INFO L130 PetriNetUnfolder]: 68/635 cut-off events. [2023-08-31 20:49:53,573 INFO L131 PetriNetUnfolder]: For 275/275 co-relation queries the response was YES. [2023-08-31 20:49:53,573 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 20:49:53,573 INFO L208 CegarLoopForPetriNet]: trace histogram [12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 20:49:53,573 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 20:49:53,573 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 20:49:53,574 INFO L85 PathProgramCache]: Analyzing trace with hash 1869412870, now seen corresponding path program 1 times [2023-08-31 20:49:53,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 20:49:53,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734889728] [2023-08-31 20:49:53,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 20:49:53,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 20:49:53,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 20:49:53,597 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 20:49:53,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 20:49:53,620 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 20:49:53,621 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 20:49:53,621 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 20:49:53,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-31 20:49:53,621 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 20:49:53,622 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 20:49:53,622 WARN L233 ceAbstractionStarter]: 11 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 20:49:53,622 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 12 thread instances. [2023-08-31 20:49:53,677 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 20:49:53,683 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 833 places, 884 transitions, 1960 flow [2023-08-31 20:49:54,113 INFO L130 PetriNetUnfolder]: 124/1467 cut-off events. [2023-08-31 20:49:54,114 INFO L131 PetriNetUnfolder]: For 352/352 co-relation queries the response was YES. [2023-08-31 20:49:54,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1582 conditions, 1467 events. 124/1467 cut-off events. For 352/352 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 7501 event pairs, 0 based on Foata normal form. 0/1206 useless extension candidates. Maximal degree in co-relation 1427. Up to 26 conditions per place. [2023-08-31 20:49:54,186 INFO L82 GeneralOperation]: Start removeDead. Operand has 833 places, 884 transitions, 1960 flow [2023-08-31 20:49:54,201 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 833 places, 884 transitions, 1960 flow [2023-08-31 20:49:54,201 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 20:49:54,201 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 833 places, 884 transitions, 1960 flow [2023-08-31 20:49:54,201 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 833 places, 884 transitions, 1960 flow [2023-08-31 20:49:54,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 833 places, 884 transitions, 1960 flow [2023-08-31 20:49:54,577 INFO L130 PetriNetUnfolder]: 124/1467 cut-off events. [2023-08-31 20:49:54,577 INFO L131 PetriNetUnfolder]: For 352/352 co-relation queries the response was YES. [2023-08-31 20:49:54,637 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1582 conditions, 1467 events. 124/1467 cut-off events. For 352/352 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 7501 event pairs, 0 based on Foata normal form. 0/1206 useless extension candidates. Maximal degree in co-relation 1427. Up to 26 conditions per place. [2023-08-31 20:49:54,786 INFO L119 LiptonReduction]: Number of co-enabled transitions 662904 [2023-08-31 20:49:59,696 INFO L134 LiptonReduction]: Checked pairs total: 4487062 [2023-08-31 20:49:59,696 INFO L136 LiptonReduction]: Total number of compositions: 361 [2023-08-31 20:49:59,698 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 20:49:59,699 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;@25a23cca, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 20:49:59,699 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 20:49:59,860 INFO L130 PetriNetUnfolder]: 76/702 cut-off events. [2023-08-31 20:49:59,860 INFO L131 PetriNetUnfolder]: For 352/352 co-relation queries the response was YES. [2023-08-31 20:49:59,860 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 20:49:59,860 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 20:49:59,861 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 20:49:59,861 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 20:49:59,861 INFO L85 PathProgramCache]: Analyzing trace with hash 28077605, now seen corresponding path program 1 times [2023-08-31 20:49:59,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 20:49:59,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637929516] [2023-08-31 20:49:59,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 20:49:59,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 20:49:59,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 20:49:59,884 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 20:49:59,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 20:49:59,906 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 20:49:59,906 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 20:49:59,906 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 20:49:59,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-31 20:49:59,907 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 20:49:59,907 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 20:49:59,907 WARN L233 ceAbstractionStarter]: 12 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 20:49:59,908 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 13 thread instances. [2023-08-31 20:49:59,964 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 20:49:59,971 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 896 places, 951 transitions, 2123 flow [2023-08-31 20:50:00,417 INFO L130 PetriNetUnfolder]: 134/1583 cut-off events. [2023-08-31 20:50:00,417 INFO L131 PetriNetUnfolder]: For 442/442 co-relation queries the response was YES. [2023-08-31 20:50:00,495 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1714 conditions, 1583 events. 134/1583 cut-off events. For 442/442 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 8164 event pairs, 0 based on Foata normal form. 0/1301 useless extension candidates. Maximal degree in co-relation 1557. Up to 28 conditions per place. [2023-08-31 20:50:00,495 INFO L82 GeneralOperation]: Start removeDead. Operand has 896 places, 951 transitions, 2123 flow [2023-08-31 20:50:00,514 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 896 places, 951 transitions, 2123 flow [2023-08-31 20:50:00,514 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 20:50:00,514 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 896 places, 951 transitions, 2123 flow [2023-08-31 20:50:00,515 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 896 places, 951 transitions, 2123 flow [2023-08-31 20:50:00,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 896 places, 951 transitions, 2123 flow [2023-08-31 20:50:00,959 INFO L130 PetriNetUnfolder]: 134/1583 cut-off events. [2023-08-31 20:50:00,959 INFO L131 PetriNetUnfolder]: For 442/442 co-relation queries the response was YES. [2023-08-31 20:50:01,028 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1714 conditions, 1583 events. 134/1583 cut-off events. For 442/442 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 8164 event pairs, 0 based on Foata normal form. 0/1301 useless extension candidates. Maximal degree in co-relation 1557. Up to 28 conditions per place. [2023-08-31 20:50:01,201 INFO L119 LiptonReduction]: Number of co-enabled transitions 775632 [2023-08-31 20:50:06,368 INFO L134 LiptonReduction]: Checked pairs total: 4664753 [2023-08-31 20:50:06,368 INFO L136 LiptonReduction]: Total number of compositions: 381 [2023-08-31 20:50:06,370 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 20:50:06,370 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;@25a23cca, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 20:50:06,370 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 20:50:06,566 INFO L130 PetriNetUnfolder]: 84/769 cut-off events. [2023-08-31 20:50:06,567 INFO L131 PetriNetUnfolder]: For 442/442 co-relation queries the response was YES. [2023-08-31 20:50:06,567 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 20:50:06,567 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 20:50:06,567 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 20:50:06,567 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 20:50:06,568 INFO L85 PathProgramCache]: Analyzing trace with hash -647532526, now seen corresponding path program 1 times [2023-08-31 20:50:06,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 20:50:06,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508513203] [2023-08-31 20:50:06,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 20:50:06,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 20:50:06,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 20:50:06,594 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 20:50:06,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 20:50:06,623 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 20:50:06,624 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 20:50:06,624 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 20:50:06,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-31 20:50:06,624 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 20:50:06,625 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 20:50:06,625 WARN L233 ceAbstractionStarter]: 13 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 20:50:06,625 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 14 thread instances. [2023-08-31 20:50:06,700 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 20:50:06,708 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 959 places, 1018 transitions, 2288 flow [2023-08-31 20:50:07,270 INFO L130 PetriNetUnfolder]: 144/1699 cut-off events. [2023-08-31 20:50:07,270 INFO L131 PetriNetUnfolder]: For 546/546 co-relation queries the response was YES. [2023-08-31 20:50:07,360 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1847 conditions, 1699 events. 144/1699 cut-off events. For 546/546 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 8785 event pairs, 0 based on Foata normal form. 0/1396 useless extension candidates. Maximal degree in co-relation 1689. Up to 30 conditions per place. [2023-08-31 20:50:07,360 INFO L82 GeneralOperation]: Start removeDead. Operand has 959 places, 1018 transitions, 2288 flow [2023-08-31 20:50:07,380 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 959 places, 1018 transitions, 2288 flow [2023-08-31 20:50:07,380 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 20:50:07,380 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 959 places, 1018 transitions, 2288 flow [2023-08-31 20:50:07,380 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 959 places, 1018 transitions, 2288 flow [2023-08-31 20:50:07,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 959 places, 1018 transitions, 2288 flow [2023-08-31 20:50:07,903 INFO L130 PetriNetUnfolder]: 144/1699 cut-off events. [2023-08-31 20:50:07,903 INFO L131 PetriNetUnfolder]: For 546/546 co-relation queries the response was YES. [2023-08-31 20:50:07,976 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1847 conditions, 1699 events. 144/1699 cut-off events. For 546/546 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 8785 event pairs, 0 based on Foata normal form. 0/1396 useless extension candidates. Maximal degree in co-relation 1689. Up to 30 conditions per place. [2023-08-31 20:50:08,173 INFO L119 LiptonReduction]: Number of co-enabled transitions 897204 [2023-08-31 20:50:13,768 INFO L134 LiptonReduction]: Checked pairs total: 6107963 [2023-08-31 20:50:13,768 INFO L136 LiptonReduction]: Total number of compositions: 404 [2023-08-31 20:50:13,770 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 20:50:13,770 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;@25a23cca, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 20:50:13,770 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 20:50:13,914 INFO L130 PetriNetUnfolder]: 92/836 cut-off events. [2023-08-31 20:50:13,914 INFO L131 PetriNetUnfolder]: For 546/546 co-relation queries the response was YES. [2023-08-31 20:50:13,914 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 20:50:13,914 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 20:50:13,914 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 20:50:13,915 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 20:50:13,915 INFO L85 PathProgramCache]: Analyzing trace with hash 1850640596, now seen corresponding path program 1 times [2023-08-31 20:50:13,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 20:50:13,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482026803] [2023-08-31 20:50:13,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 20:50:13,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 20:50:13,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 20:50:13,946 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 20:50:13,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 20:50:13,972 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 20:50:13,972 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 20:50:13,972 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 20:50:13,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-31 20:50:13,973 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 20:50:13,973 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 20:50:13,973 WARN L233 ceAbstractionStarter]: 14 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 20:50:13,973 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 15 thread instances. [2023-08-31 20:50:14,063 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 20:50:14,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1022 places, 1085 transitions, 2455 flow [2023-08-31 20:50:14,788 INFO L130 PetriNetUnfolder]: 154/1815 cut-off events. [2023-08-31 20:50:14,788 INFO L131 PetriNetUnfolder]: For 665/665 co-relation queries the response was YES. [2023-08-31 20:50:14,894 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1981 conditions, 1815 events. 154/1815 cut-off events. For 665/665 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 9423 event pairs, 0 based on Foata normal form. 0/1491 useless extension candidates. Maximal degree in co-relation 1822. Up to 32 conditions per place. [2023-08-31 20:50:14,894 INFO L82 GeneralOperation]: Start removeDead. Operand has 1022 places, 1085 transitions, 2455 flow [2023-08-31 20:50:14,916 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1022 places, 1085 transitions, 2455 flow [2023-08-31 20:50:14,916 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 20:50:14,916 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1022 places, 1085 transitions, 2455 flow [2023-08-31 20:50:14,917 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1022 places, 1085 transitions, 2455 flow [2023-08-31 20:50:14,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1022 places, 1085 transitions, 2455 flow [2023-08-31 20:50:15,532 INFO L130 PetriNetUnfolder]: 154/1815 cut-off events. [2023-08-31 20:50:15,532 INFO L131 PetriNetUnfolder]: For 665/665 co-relation queries the response was YES. [2023-08-31 20:50:15,615 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1981 conditions, 1815 events. 154/1815 cut-off events. For 665/665 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 9423 event pairs, 0 based on Foata normal form. 0/1491 useless extension candidates. Maximal degree in co-relation 1822. Up to 32 conditions per place. [2023-08-31 20:50:15,838 INFO L119 LiptonReduction]: Number of co-enabled transitions 1027620 [2023-08-31 20:50:21,706 INFO L134 LiptonReduction]: Checked pairs total: 7031871 [2023-08-31 20:50:21,706 INFO L136 LiptonReduction]: Total number of compositions: 428 [2023-08-31 20:50:21,708 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 20:50:21,708 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@25a23cca, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 20:50:21,708 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 20:50:21,878 INFO L130 PetriNetUnfolder]: 100/903 cut-off events. [2023-08-31 20:50:21,878 INFO L131 PetriNetUnfolder]: For 665/665 co-relation queries the response was YES. [2023-08-31 20:50:21,878 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 20:50:21,878 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 20:50:21,879 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 20:50:21,879 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 20:50:21,879 INFO L85 PathProgramCache]: Analyzing trace with hash -411548552, now seen corresponding path program 1 times [2023-08-31 20:50:21,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 20:50:21,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850822459] [2023-08-31 20:50:21,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 20:50:21,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 20:50:21,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 20:50:21,907 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 20:50:21,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 20:50:21,938 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 20:50:21,938 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 20:50:21,938 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 20:50:21,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-31 20:50:21,939 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 20:50:21,939 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 20:50:21,939 WARN L233 ceAbstractionStarter]: 15 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 20:50:21,939 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 16 thread instances. [2023-08-31 20:50:22,007 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 20:50:22,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1085 places, 1152 transitions, 2624 flow [2023-08-31 20:50:22,848 INFO L130 PetriNetUnfolder]: 164/1931 cut-off events. [2023-08-31 20:50:22,848 INFO L131 PetriNetUnfolder]: For 800/800 co-relation queries the response was YES. [2023-08-31 20:50:22,966 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2116 conditions, 1931 events. 164/1931 cut-off events. For 800/800 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 10065 event pairs, 0 based on Foata normal form. 0/1586 useless extension candidates. Maximal degree in co-relation 1956. Up to 34 conditions per place. [2023-08-31 20:50:22,966 INFO L82 GeneralOperation]: Start removeDead. Operand has 1085 places, 1152 transitions, 2624 flow [2023-08-31 20:50:22,990 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1085 places, 1152 transitions, 2624 flow [2023-08-31 20:50:22,990 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 20:50:22,991 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1085 places, 1152 transitions, 2624 flow [2023-08-31 20:50:22,991 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1085 places, 1152 transitions, 2624 flow [2023-08-31 20:50:22,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1085 places, 1152 transitions, 2624 flow [2023-08-31 20:50:23,692 INFO L130 PetriNetUnfolder]: 164/1931 cut-off events. [2023-08-31 20:50:23,692 INFO L131 PetriNetUnfolder]: For 800/800 co-relation queries the response was YES. [2023-08-31 20:50:23,777 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2116 conditions, 1931 events. 164/1931 cut-off events. For 800/800 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 10065 event pairs, 0 based on Foata normal form. 0/1586 useless extension candidates. Maximal degree in co-relation 1956. Up to 34 conditions per place. [2023-08-31 20:50:24,024 INFO L119 LiptonReduction]: Number of co-enabled transitions 1166880 [2023-08-31 20:50:30,099 INFO L134 LiptonReduction]: Checked pairs total: 7077313 [2023-08-31 20:50:30,099 INFO L136 LiptonReduction]: Total number of compositions: 458 [2023-08-31 20:50:30,101 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 20:50:30,101 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;@25a23cca, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 20:50:30,101 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 20:50:30,298 INFO L130 PetriNetUnfolder]: 108/970 cut-off events. [2023-08-31 20:50:30,298 INFO L131 PetriNetUnfolder]: For 800/800 co-relation queries the response was YES. [2023-08-31 20:50:30,298 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 20:50:30,298 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 20:50:30,299 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 20:50:30,299 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 20:50:30,299 INFO L85 PathProgramCache]: Analyzing trace with hash -1809314502, now seen corresponding path program 1 times [2023-08-31 20:50:30,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 20:50:30,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544326245] [2023-08-31 20:50:30,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 20:50:30,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 20:50:30,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 20:50:30,328 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 20:50:30,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 20:50:30,357 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 20:50:30,358 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 20:50:30,358 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 20:50:30,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-31 20:50:30,358 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 20:50:30,359 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 20:50:30,359 WARN L233 ceAbstractionStarter]: 16 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 20:50:30,359 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 17 thread instances. [2023-08-31 20:50:30,424 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 20:50:30,432 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1148 places, 1219 transitions, 2795 flow [2023-08-31 20:50:31,202 INFO L130 PetriNetUnfolder]: 174/2047 cut-off events. [2023-08-31 20:50:31,202 INFO L131 PetriNetUnfolder]: For 952/952 co-relation queries the response was YES. [2023-08-31 20:50:31,322 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2252 conditions, 2047 events. 174/2047 cut-off events. For 952/952 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 10697 event pairs, 0 based on Foata normal form. 0/1681 useless extension candidates. Maximal degree in co-relation 2091. Up to 36 conditions per place. [2023-08-31 20:50:31,322 INFO L82 GeneralOperation]: Start removeDead. Operand has 1148 places, 1219 transitions, 2795 flow [2023-08-31 20:50:31,348 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1148 places, 1219 transitions, 2795 flow [2023-08-31 20:50:31,348 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 20:50:31,348 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1148 places, 1219 transitions, 2795 flow [2023-08-31 20:50:31,348 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1148 places, 1219 transitions, 2795 flow [2023-08-31 20:50:31,348 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1148 places, 1219 transitions, 2795 flow [2023-08-31 20:50:32,134 INFO L130 PetriNetUnfolder]: 174/2047 cut-off events. [2023-08-31 20:50:32,134 INFO L131 PetriNetUnfolder]: For 952/952 co-relation queries the response was YES. [2023-08-31 20:50:32,232 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2252 conditions, 2047 events. 174/2047 cut-off events. For 952/952 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 10697 event pairs, 0 based on Foata normal form. 0/1681 useless extension candidates. Maximal degree in co-relation 2091. Up to 36 conditions per place. [2023-08-31 20:50:32,514 INFO L119 LiptonReduction]: Number of co-enabled transitions 1314984 [2023-08-31 20:50:39,060 INFO L134 LiptonReduction]: Checked pairs total: 9036640 [2023-08-31 20:50:39,060 INFO L136 LiptonReduction]: Total number of compositions: 477 [2023-08-31 20:50:39,062 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 20:50:39,062 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;@25a23cca, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 20:50:39,062 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 20:50:39,319 INFO L130 PetriNetUnfolder]: 116/1037 cut-off events. [2023-08-31 20:50:39,320 INFO L131 PetriNetUnfolder]: For 952/952 co-relation queries the response was YES. [2023-08-31 20:50:39,320 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 20:50:39,320 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 20:50:39,320 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 20:50:39,320 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 20:50:39,320 INFO L85 PathProgramCache]: Analyzing trace with hash 638758926, now seen corresponding path program 1 times [2023-08-31 20:50:39,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 20:50:39,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954328669] [2023-08-31 20:50:39,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 20:50:39,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 20:50:39,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 20:50:39,348 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 20:50:39,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 20:50:39,382 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 20:50:39,382 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 20:50:39,383 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 20:50:39,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-31 20:50:39,383 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 20:50:39,383 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 20:50:39,383 WARN L233 ceAbstractionStarter]: 17 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 20:50:39,384 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 18 thread instances. [2023-08-31 20:50:39,455 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 20:50:39,463 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1211 places, 1286 transitions, 2968 flow [2023-08-31 20:50:40,337 INFO L130 PetriNetUnfolder]: 184/2163 cut-off events. [2023-08-31 20:50:40,338 INFO L131 PetriNetUnfolder]: For 1122/1122 co-relation queries the response was YES. [2023-08-31 20:50:40,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2389 conditions, 2163 events. 184/2163 cut-off events. For 1122/1122 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 11351 event pairs, 0 based on Foata normal form. 0/1776 useless extension candidates. Maximal degree in co-relation 2227. Up to 38 conditions per place. [2023-08-31 20:50:40,483 INFO L82 GeneralOperation]: Start removeDead. Operand has 1211 places, 1286 transitions, 2968 flow [2023-08-31 20:50:40,513 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1211 places, 1286 transitions, 2968 flow [2023-08-31 20:50:40,513 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 20:50:40,513 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1211 places, 1286 transitions, 2968 flow [2023-08-31 20:50:40,514 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1211 places, 1286 transitions, 2968 flow [2023-08-31 20:50:40,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1211 places, 1286 transitions, 2968 flow [2023-08-31 20:50:41,403 INFO L130 PetriNetUnfolder]: 184/2163 cut-off events. [2023-08-31 20:50:41,404 INFO L131 PetriNetUnfolder]: For 1122/1122 co-relation queries the response was YES. [2023-08-31 20:50:41,510 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2389 conditions, 2163 events. 184/2163 cut-off events. For 1122/1122 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 11351 event pairs, 0 based on Foata normal form. 0/1776 useless extension candidates. Maximal degree in co-relation 2227. Up to 38 conditions per place. [2023-08-31 20:50:41,823 INFO L119 LiptonReduction]: Number of co-enabled transitions 1471932 [2023-08-31 20:50:48,514 INFO L134 LiptonReduction]: Checked pairs total: 8987472 [2023-08-31 20:50:48,514 INFO L136 LiptonReduction]: Total number of compositions: 505 [2023-08-31 20:50:48,516 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 20:50:48,516 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@25a23cca, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 20:50:48,516 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 20:50:48,813 INFO L130 PetriNetUnfolder]: 124/1104 cut-off events. [2023-08-31 20:50:48,813 INFO L131 PetriNetUnfolder]: For 1122/1122 co-relation queries the response was YES. [2023-08-31 20:50:48,813 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 20:50:48,814 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 20:50:48,814 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 20:50:48,814 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 20:50:48,814 INFO L85 PathProgramCache]: Analyzing trace with hash -1122934833, now seen corresponding path program 1 times [2023-08-31 20:50:48,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 20:50:48,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332024321] [2023-08-31 20:50:48,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 20:50:48,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 20:50:48,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 20:50:48,840 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 20:50:48,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 20:50:48,883 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 20:50:48,885 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 20:50:48,885 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 20:50:48,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-31 20:50:48,886 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 20:50:48,886 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 20:50:48,886 WARN L233 ceAbstractionStarter]: 18 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 20:50:48,886 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 19 thread instances. [2023-08-31 20:50:48,960 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 20:50:48,968 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1274 places, 1353 transitions, 3143 flow [2023-08-31 20:50:50,058 INFO L130 PetriNetUnfolder]: 194/2279 cut-off events. [2023-08-31 20:50:50,058 INFO L131 PetriNetUnfolder]: For 1311/1311 co-relation queries the response was YES. [2023-08-31 20:50:50,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2527 conditions, 2279 events. 194/2279 cut-off events. For 1311/1311 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 12033 event pairs, 0 based on Foata normal form. 0/1871 useless extension candidates. Maximal degree in co-relation 2364. Up to 40 conditions per place. [2023-08-31 20:50:50,212 INFO L82 GeneralOperation]: Start removeDead. Operand has 1274 places, 1353 transitions, 3143 flow [2023-08-31 20:50:50,246 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1274 places, 1353 transitions, 3143 flow [2023-08-31 20:50:50,246 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 20:50:50,246 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1274 places, 1353 transitions, 3143 flow [2023-08-31 20:50:50,246 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1274 places, 1353 transitions, 3143 flow [2023-08-31 20:50:50,246 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1274 places, 1353 transitions, 3143 flow [2023-08-31 20:50:51,301 INFO L130 PetriNetUnfolder]: 194/2279 cut-off events. [2023-08-31 20:50:51,301 INFO L131 PetriNetUnfolder]: For 1311/1311 co-relation queries the response was YES. [2023-08-31 20:50:51,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2527 conditions, 2279 events. 194/2279 cut-off events. For 1311/1311 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 12033 event pairs, 0 based on Foata normal form. 0/1871 useless extension candidates. Maximal degree in co-relation 2364. Up to 40 conditions per place. [2023-08-31 20:50:51,786 INFO L119 LiptonReduction]: Number of co-enabled transitions 1637724 [2023-08-31 20:50:59,185 INFO L134 LiptonReduction]: Checked pairs total: 11318115 [2023-08-31 20:50:59,185 INFO L136 LiptonReduction]: Total number of compositions: 527 [2023-08-31 20:50:59,186 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 20:50:59,187 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;@25a23cca, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 20:50:59,187 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 20:50:59,497 INFO L130 PetriNetUnfolder]: 132/1171 cut-off events. [2023-08-31 20:50:59,497 INFO L131 PetriNetUnfolder]: For 1311/1311 co-relation queries the response was YES. [2023-08-31 20:50:59,497 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 20:50:59,497 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 20:50:59,498 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 20:50:59,498 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 20:50:59,498 INFO L85 PathProgramCache]: Analyzing trace with hash -938982109, now seen corresponding path program 1 times [2023-08-31 20:50:59,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 20:50:59,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857811962] [2023-08-31 20:50:59,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 20:50:59,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 20:50:59,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 20:50:59,532 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 20:50:59,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 20:50:59,571 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 20:50:59,572 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 20:50:59,572 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 20:50:59,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-08-31 20:50:59,572 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 20:50:59,573 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 20:50:59,573 WARN L233 ceAbstractionStarter]: 19 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 20:50:59,573 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 20 thread instances. [2023-08-31 20:50:59,652 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 20:50:59,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1337 places, 1420 transitions, 3320 flow [2023-08-31 20:51:00,798 INFO L130 PetriNetUnfolder]: 204/2395 cut-off events. [2023-08-31 20:51:00,799 INFO L131 PetriNetUnfolder]: For 1520/1520 co-relation queries the response was YES. [2023-08-31 20:51:00,961 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2666 conditions, 2395 events. 204/2395 cut-off events. For 1520/1520 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 12612 event pairs, 0 based on Foata normal form. 0/1966 useless extension candidates. Maximal degree in co-relation 2502. Up to 42 conditions per place. [2023-08-31 20:51:00,961 INFO L82 GeneralOperation]: Start removeDead. Operand has 1337 places, 1420 transitions, 3320 flow [2023-08-31 20:51:00,996 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1337 places, 1420 transitions, 3320 flow [2023-08-31 20:51:00,996 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 20:51:00,996 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1337 places, 1420 transitions, 3320 flow [2023-08-31 20:51:00,996 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1337 places, 1420 transitions, 3320 flow [2023-08-31 20:51:00,996 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1337 places, 1420 transitions, 3320 flow [2023-08-31 20:51:02,174 INFO L130 PetriNetUnfolder]: 204/2395 cut-off events. [2023-08-31 20:51:02,174 INFO L131 PetriNetUnfolder]: For 1520/1520 co-relation queries the response was YES. [2023-08-31 20:51:02,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2666 conditions, 2395 events. 204/2395 cut-off events. For 1520/1520 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 12612 event pairs, 0 based on Foata normal form. 0/1966 useless extension candidates. Maximal degree in co-relation 2502. Up to 42 conditions per place. [2023-08-31 20:51:02,683 INFO L119 LiptonReduction]: Number of co-enabled transitions 1812360 [2023-08-31 20:51:10,304 INFO L134 LiptonReduction]: Checked pairs total: 11056458 [2023-08-31 20:51:10,304 INFO L136 LiptonReduction]: Total number of compositions: 549 [2023-08-31 20:51:10,305 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 20:51:10,306 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;@25a23cca, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 20:51:10,306 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 20:51:10,646 INFO L130 PetriNetUnfolder]: 140/1238 cut-off events. [2023-08-31 20:51:10,647 INFO L131 PetriNetUnfolder]: For 1520/1520 co-relation queries the response was YES. [2023-08-31 20:51:10,647 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 20:51:10,647 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 20:51:10,647 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 20:51:10,647 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 20:51:10,647 INFO L85 PathProgramCache]: Analyzing trace with hash -881610476, now seen corresponding path program 1 times [2023-08-31 20:51:10,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 20:51:10,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602498804] [2023-08-31 20:51:10,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 20:51:10,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 20:51:10,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 20:51:10,680 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 20:51:10,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 20:51:10,717 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 20:51:10,717 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 20:51:10,718 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 20:51:10,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-08-31 20:51:10,718 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 20:51:10,718 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 20:51:10,718 WARN L233 ceAbstractionStarter]: 20 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 20:51:10,718 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 21 thread instances. [2023-08-31 20:51:10,800 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 20:51:10,808 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1400 places, 1487 transitions, 3499 flow [2023-08-31 20:51:12,087 INFO L130 PetriNetUnfolder]: 214/2511 cut-off events. [2023-08-31 20:51:12,087 INFO L131 PetriNetUnfolder]: For 1750/1750 co-relation queries the response was YES. [2023-08-31 20:51:12,248 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2806 conditions, 2511 events. 214/2511 cut-off events. For 1750/1750 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 13263 event pairs, 0 based on Foata normal form. 0/2061 useless extension candidates. Maximal degree in co-relation 2641. Up to 44 conditions per place. [2023-08-31 20:51:12,248 INFO L82 GeneralOperation]: Start removeDead. Operand has 1400 places, 1487 transitions, 3499 flow [2023-08-31 20:51:12,282 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1400 places, 1487 transitions, 3499 flow [2023-08-31 20:51:12,282 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 20:51:12,283 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1400 places, 1487 transitions, 3499 flow [2023-08-31 20:51:12,283 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1400 places, 1487 transitions, 3499 flow [2023-08-31 20:51:12,283 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1400 places, 1487 transitions, 3499 flow [2023-08-31 20:51:13,714 INFO L130 PetriNetUnfolder]: 214/2511 cut-off events. [2023-08-31 20:51:13,714 INFO L131 PetriNetUnfolder]: For 1750/1750 co-relation queries the response was YES. [2023-08-31 20:51:13,833 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2806 conditions, 2511 events. 214/2511 cut-off events. For 1750/1750 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 13263 event pairs, 0 based on Foata normal form. 0/2061 useless extension candidates. Maximal degree in co-relation 2641. Up to 44 conditions per place. [2023-08-31 20:51:14,219 INFO L119 LiptonReduction]: Number of co-enabled transitions 1995840 [2023-08-31 20:51:22,166 INFO L134 LiptonReduction]: Checked pairs total: 12189394 [2023-08-31 20:51:22,166 INFO L136 LiptonReduction]: Total number of compositions: 578 [2023-08-31 20:51:22,167 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 20:51:22,168 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;@25a23cca, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 20:51:22,168 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 20:51:22,542 INFO L130 PetriNetUnfolder]: 148/1305 cut-off events. [2023-08-31 20:51:22,542 INFO L131 PetriNetUnfolder]: For 1750/1750 co-relation queries the response was YES. [2023-08-31 20:51:22,542 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 20:51:22,543 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 20:51:22,543 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 20:51:22,543 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 20:51:22,543 INFO L85 PathProgramCache]: Analyzing trace with hash -447118667, now seen corresponding path program 1 times [2023-08-31 20:51:22,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 20:51:22,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63507843] [2023-08-31 20:51:22,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 20:51:22,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 20:51:22,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 20:51:22,578 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 20:51:22,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 20:51:22,621 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 20:51:22,621 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 20:51:22,621 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 20:51:22,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-08-31 20:51:22,622 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 20:51:22,622 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 20:51:22,622 WARN L233 ceAbstractionStarter]: 21 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 20:51:22,622 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 22 thread instances. [2023-08-31 20:51:22,707 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 20:51:22,716 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1463 places, 1554 transitions, 3680 flow [2023-08-31 20:51:24,191 INFO L130 PetriNetUnfolder]: 224/2627 cut-off events. [2023-08-31 20:51:24,191 INFO L131 PetriNetUnfolder]: For 2002/2002 co-relation queries the response was YES. [2023-08-31 20:51:24,487 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2947 conditions, 2627 events. 224/2627 cut-off events. For 2002/2002 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 13920 event pairs, 0 based on Foata normal form. 0/2156 useless extension candidates. Maximal degree in co-relation 2781. Up to 46 conditions per place. [2023-08-31 20:51:24,488 INFO L82 GeneralOperation]: Start removeDead. Operand has 1463 places, 1554 transitions, 3680 flow [2023-08-31 20:51:24,751 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1463 places, 1554 transitions, 3680 flow [2023-08-31 20:51:24,752 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 20:51:24,752 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1463 places, 1554 transitions, 3680 flow [2023-08-31 20:51:24,752 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1463 places, 1554 transitions, 3680 flow [2023-08-31 20:51:24,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1463 places, 1554 transitions, 3680 flow [2023-08-31 20:51:26,556 INFO L130 PetriNetUnfolder]: 224/2627 cut-off events. [2023-08-31 20:51:26,556 INFO L131 PetriNetUnfolder]: For 2002/2002 co-relation queries the response was YES. [2023-08-31 20:51:26,693 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2947 conditions, 2627 events. 224/2627 cut-off events. For 2002/2002 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 13920 event pairs, 0 based on Foata normal form. 0/2156 useless extension candidates. Maximal degree in co-relation 2781. Up to 46 conditions per place. [2023-08-31 20:51:27,243 INFO L119 LiptonReduction]: Number of co-enabled transitions 2188164 [2023-08-31 20:51:35,512 INFO L134 LiptonReduction]: Checked pairs total: 13376129 [2023-08-31 20:51:35,512 INFO L136 LiptonReduction]: Total number of compositions: 600 [2023-08-31 20:51:35,514 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 20:51:35,514 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;@25a23cca, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 20:51:35,514 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 20:51:36,023 INFO L130 PetriNetUnfolder]: 156/1372 cut-off events. [2023-08-31 20:51:36,023 INFO L131 PetriNetUnfolder]: For 2002/2002 co-relation queries the response was YES. [2023-08-31 20:51:36,023 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 20:51:36,023 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 20:51:36,023 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 20:51:36,024 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 20:51:36,024 INFO L85 PathProgramCache]: Analyzing trace with hash -360608519, now seen corresponding path program 1 times [2023-08-31 20:51:36,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 20:51:36,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511422484] [2023-08-31 20:51:36,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 20:51:36,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 20:51:36,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 20:51:36,087 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 20:51:36,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 20:51:36,131 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 20:51:36,131 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 20:51:36,131 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 20:51:36,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-08-31 20:51:36,132 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 20:51:36,132 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 20:51:36,132 WARN L233 ceAbstractionStarter]: 22 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 20:51:36,132 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 23 thread instances. [2023-08-31 20:51:36,233 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 20:51:36,247 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1526 places, 1621 transitions, 3863 flow [2023-08-31 20:51:37,935 INFO L130 PetriNetUnfolder]: 234/2743 cut-off events. [2023-08-31 20:51:37,936 INFO L131 PetriNetUnfolder]: For 2277/2277 co-relation queries the response was YES. [2023-08-31 20:51:38,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3089 conditions, 2743 events. 234/2743 cut-off events. For 2277/2277 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 14534 event pairs, 0 based on Foata normal form. 0/2251 useless extension candidates. Maximal degree in co-relation 2922. Up to 48 conditions per place. [2023-08-31 20:51:38,092 INFO L82 GeneralOperation]: Start removeDead. Operand has 1526 places, 1621 transitions, 3863 flow [2023-08-31 20:51:38,121 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1526 places, 1621 transitions, 3863 flow [2023-08-31 20:51:38,122 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 20:51:38,122 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1526 places, 1621 transitions, 3863 flow [2023-08-31 20:51:38,122 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1526 places, 1621 transitions, 3863 flow [2023-08-31 20:51:38,122 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1526 places, 1621 transitions, 3863 flow [2023-08-31 20:51:39,860 INFO L130 PetriNetUnfolder]: 234/2743 cut-off events. [2023-08-31 20:51:39,860 INFO L131 PetriNetUnfolder]: For 2277/2277 co-relation queries the response was YES. [2023-08-31 20:51:40,019 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3089 conditions, 2743 events. 234/2743 cut-off events. For 2277/2277 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 14534 event pairs, 0 based on Foata normal form. 0/2251 useless extension candidates. Maximal degree in co-relation 2922. Up to 48 conditions per place. [2023-08-31 20:51:40,656 INFO L119 LiptonReduction]: Number of co-enabled transitions 2389332 [2023-08-31 20:51:49,393 INFO L134 LiptonReduction]: Checked pairs total: 14676571 [2023-08-31 20:51:49,393 INFO L136 LiptonReduction]: Total number of compositions: 622 [2023-08-31 20:51:49,395 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 20:51:49,395 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;@25a23cca, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 20:51:49,395 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 20:51:49,899 INFO L130 PetriNetUnfolder]: 164/1439 cut-off events. [2023-08-31 20:51:49,900 INFO L131 PetriNetUnfolder]: For 2277/2277 co-relation queries the response was YES. [2023-08-31 20:51:49,900 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 20:51:49,900 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 20:51:49,900 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 20:51:49,900 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 20:51:49,900 INFO L85 PathProgramCache]: Analyzing trace with hash -1510999369, now seen corresponding path program 1 times [2023-08-31 20:51:49,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 20:51:49,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457660307] [2023-08-31 20:51:49,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 20:51:49,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 20:51:49,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 20:51:49,935 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 20:51:49,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 20:51:49,978 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 20:51:49,978 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 20:51:49,979 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 20:51:49,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-08-31 20:51:49,979 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 20:51:49,979 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 20:51:49,980 WARN L233 ceAbstractionStarter]: 23 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 20:51:49,980 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 24 thread instances. [2023-08-31 20:51:50,069 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 20:51:50,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1589 places, 1688 transitions, 4048 flow [2023-08-31 20:51:51,872 INFO L130 PetriNetUnfolder]: 244/2859 cut-off events. [2023-08-31 20:51:51,872 INFO L131 PetriNetUnfolder]: For 2576/2576 co-relation queries the response was YES. [2023-08-31 20:51:52,039 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3232 conditions, 2859 events. 244/2859 cut-off events. For 2576/2576 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 15093 event pairs, 0 based on Foata normal form. 0/2346 useless extension candidates. Maximal degree in co-relation 3064. Up to 50 conditions per place. [2023-08-31 20:51:52,039 INFO L82 GeneralOperation]: Start removeDead. Operand has 1589 places, 1688 transitions, 4048 flow [2023-08-31 20:51:52,070 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1589 places, 1688 transitions, 4048 flow [2023-08-31 20:51:52,070 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 20:51:52,070 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1589 places, 1688 transitions, 4048 flow [2023-08-31 20:51:52,070 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1589 places, 1688 transitions, 4048 flow [2023-08-31 20:51:52,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1589 places, 1688 transitions, 4048 flow [2023-08-31 20:51:53,846 INFO L130 PetriNetUnfolder]: 244/2859 cut-off events. [2023-08-31 20:51:53,846 INFO L131 PetriNetUnfolder]: For 2576/2576 co-relation queries the response was YES. [2023-08-31 20:51:54,037 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3232 conditions, 2859 events. 244/2859 cut-off events. For 2576/2576 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 15093 event pairs, 0 based on Foata normal form. 0/2346 useless extension candidates. Maximal degree in co-relation 3064. Up to 50 conditions per place. [2023-08-31 20:51:54,800 INFO L119 LiptonReduction]: Number of co-enabled transitions 2599344 [2023-08-31 20:52:03,756 INFO L134 LiptonReduction]: Checked pairs total: 15859702 [2023-08-31 20:52:03,756 INFO L136 LiptonReduction]: Total number of compositions: 646 [2023-08-31 20:52:03,758 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 20:52:03,758 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;@25a23cca, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 20:52:03,758 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 20:52:04,340 INFO L130 PetriNetUnfolder]: 195/1529 cut-off events. [2023-08-31 20:52:04,340 INFO L131 PetriNetUnfolder]: For 2576/2576 co-relation queries the response was YES. [2023-08-31 20:52:04,340 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 20:52:04,341 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 20:52:04,341 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 20:52:04,341 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 20:52:04,341 INFO L85 PathProgramCache]: Analyzing trace with hash 740486326, now seen corresponding path program 1 times [2023-08-31 20:52:04,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 20:52:04,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273928503] [2023-08-31 20:52:04,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 20:52:04,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 20:52:04,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 20:52:04,376 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 20:52:04,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 20:52:04,425 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 20:52:04,426 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 20:52:04,426 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 20:52:04,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-08-31 20:52:04,426 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 20:52:04,426 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 20:52:04,427 WARN L233 ceAbstractionStarter]: 24 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 20:52:04,427 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 25 thread instances. [2023-08-31 20:52:04,523 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 20:52:04,532 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1652 places, 1755 transitions, 4235 flow [2023-08-31 20:52:06,511 INFO L130 PetriNetUnfolder]: 254/2975 cut-off events. [2023-08-31 20:52:06,512 INFO L131 PetriNetUnfolder]: For 2900/2900 co-relation queries the response was YES. [2023-08-31 20:52:06,692 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3376 conditions, 2975 events. 254/2975 cut-off events. For 2900/2900 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 15748 event pairs, 0 based on Foata normal form. 0/2441 useless extension candidates. Maximal degree in co-relation 3207. Up to 52 conditions per place. [2023-08-31 20:52:06,692 INFO L82 GeneralOperation]: Start removeDead. Operand has 1652 places, 1755 transitions, 4235 flow [2023-08-31 20:52:06,747 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1652 places, 1755 transitions, 4235 flow [2023-08-31 20:52:06,748 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 20:52:06,748 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1652 places, 1755 transitions, 4235 flow [2023-08-31 20:52:06,748 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1652 places, 1755 transitions, 4235 flow [2023-08-31 20:52:06,748 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1652 places, 1755 transitions, 4235 flow [2023-08-31 20:52:08,807 INFO L130 PetriNetUnfolder]: 254/2975 cut-off events. [2023-08-31 20:52:08,808 INFO L131 PetriNetUnfolder]: For 2900/2900 co-relation queries the response was YES. [2023-08-31 20:52:08,990 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3376 conditions, 2975 events. 254/2975 cut-off events. For 2900/2900 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 15748 event pairs, 0 based on Foata normal form. 0/2441 useless extension candidates. Maximal degree in co-relation 3207. Up to 52 conditions per place. [2023-08-31 20:52:09,569 INFO L119 LiptonReduction]: Number of co-enabled transitions 2818200 [2023-08-31 20:52:19,527 INFO L134 LiptonReduction]: Checked pairs total: 19545290 [2023-08-31 20:52:19,528 INFO L136 LiptonReduction]: Total number of compositions: 666 [2023-08-31 20:52:19,529 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 20:52:19,529 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;@25a23cca, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 20:52:19,529 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 20:52:20,130 INFO L130 PetriNetUnfolder]: 204/1597 cut-off events. [2023-08-31 20:52:20,130 INFO L131 PetriNetUnfolder]: For 2900/2900 co-relation queries the response was YES. [2023-08-31 20:52:20,131 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 20:52:20,131 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 20:52:20,131 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 20:52:20,131 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 20:52:20,131 INFO L85 PathProgramCache]: Analyzing trace with hash -544931715, now seen corresponding path program 1 times [2023-08-31 20:52:20,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 20:52:20,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520388315] [2023-08-31 20:52:20,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 20:52:20,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 20:52:20,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 20:52:20,169 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 20:52:20,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 20:52:20,221 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 20:52:20,221 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 20:52:20,221 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 20:52:20,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2023-08-31 20:52:20,222 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 20:52:20,222 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 20:52:20,222 WARN L233 ceAbstractionStarter]: 25 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 20:52:20,222 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 26 thread instances. [2023-08-31 20:52:20,322 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 20:52:20,331 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1715 places, 1822 transitions, 4424 flow [2023-08-31 20:52:22,457 INFO L130 PetriNetUnfolder]: 264/3091 cut-off events. [2023-08-31 20:52:22,457 INFO L131 PetriNetUnfolder]: For 3250/3250 co-relation queries the response was YES. [2023-08-31 20:52:22,659 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3521 conditions, 3091 events. 264/3091 cut-off events. For 3250/3250 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 16379 event pairs, 0 based on Foata normal form. 0/2536 useless extension candidates. Maximal degree in co-relation 3351. Up to 54 conditions per place. [2023-08-31 20:52:22,659 INFO L82 GeneralOperation]: Start removeDead. Operand has 1715 places, 1822 transitions, 4424 flow [2023-08-31 20:52:22,713 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1715 places, 1822 transitions, 4424 flow [2023-08-31 20:52:22,713 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 20:52:22,713 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1715 places, 1822 transitions, 4424 flow [2023-08-31 20:52:22,713 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1715 places, 1822 transitions, 4424 flow [2023-08-31 20:52:22,714 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1715 places, 1822 transitions, 4424 flow [2023-08-31 20:52:24,953 INFO L130 PetriNetUnfolder]: 264/3091 cut-off events. [2023-08-31 20:52:24,953 INFO L131 PetriNetUnfolder]: For 3250/3250 co-relation queries the response was YES. [2023-08-31 20:52:25,167 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3521 conditions, 3091 events. 264/3091 cut-off events. For 3250/3250 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 16379 event pairs, 0 based on Foata normal form. 0/2536 useless extension candidates. Maximal degree in co-relation 3351. Up to 54 conditions per place. [2023-08-31 20:52:25,943 INFO L119 LiptonReduction]: Number of co-enabled transitions 3045900 [2023-08-31 20:52:36,060 INFO L134 LiptonReduction]: Checked pairs total: 21132932 [2023-08-31 20:52:36,061 INFO L136 LiptonReduction]: Total number of compositions: 688 [2023-08-31 20:52:36,062 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 20:52:36,062 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;@25a23cca, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 20:52:36,062 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 20:52:36,762 INFO L130 PetriNetUnfolder]: 188/1640 cut-off events. [2023-08-31 20:52:36,762 INFO L131 PetriNetUnfolder]: For 3250/3250 co-relation queries the response was YES. [2023-08-31 20:52:36,762 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 20:52:36,762 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 20:52:36,763 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 20:52:36,763 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 20:52:36,763 INFO L85 PathProgramCache]: Analyzing trace with hash 240597219, now seen corresponding path program 1 times [2023-08-31 20:52:36,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 20:52:36,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108764645] [2023-08-31 20:52:36,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 20:52:36,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 20:52:36,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 20:52:36,827 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 20:52:36,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 20:52:36,891 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 20:52:36,892 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 20:52:36,893 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 20:52:36,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2023-08-31 20:52:36,893 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 20:52:36,894 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 20:52:36,894 WARN L233 ceAbstractionStarter]: 26 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 20:52:36,894 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 27 thread instances. [2023-08-31 20:52:36,999 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 20:52:37,009 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1778 places, 1889 transitions, 4615 flow [2023-08-31 20:52:39,246 INFO L130 PetriNetUnfolder]: 274/3207 cut-off events. [2023-08-31 20:52:39,246 INFO L131 PetriNetUnfolder]: For 3627/3627 co-relation queries the response was YES. [2023-08-31 20:52:39,487 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3667 conditions, 3207 events. 274/3207 cut-off events. For 3627/3627 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 17002 event pairs, 0 based on Foata normal form. 0/2631 useless extension candidates. Maximal degree in co-relation 3496. Up to 56 conditions per place. [2023-08-31 20:52:39,488 INFO L82 GeneralOperation]: Start removeDead. Operand has 1778 places, 1889 transitions, 4615 flow [2023-08-31 20:52:39,531 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1778 places, 1889 transitions, 4615 flow [2023-08-31 20:52:39,531 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 20:52:39,531 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1778 places, 1889 transitions, 4615 flow [2023-08-31 20:52:39,531 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1778 places, 1889 transitions, 4615 flow [2023-08-31 20:52:39,531 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1778 places, 1889 transitions, 4615 flow [2023-08-31 20:52:41,926 INFO L130 PetriNetUnfolder]: 274/3207 cut-off events. [2023-08-31 20:52:41,926 INFO L131 PetriNetUnfolder]: For 3627/3627 co-relation queries the response was YES. [2023-08-31 20:52:42,137 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3667 conditions, 3207 events. 274/3207 cut-off events. For 3627/3627 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 17002 event pairs, 0 based on Foata normal form. 0/2631 useless extension candidates. Maximal degree in co-relation 3496. Up to 56 conditions per place. [2023-08-31 20:52:42,804 INFO L119 LiptonReduction]: Number of co-enabled transitions 3282444 [2023-08-31 20:52:53,344 INFO L134 LiptonReduction]: Checked pairs total: 20099851 [2023-08-31 20:52:53,344 INFO L136 LiptonReduction]: Total number of compositions: 709 [2023-08-31 20:52:53,346 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 20:52:53,346 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;@25a23cca, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 20:52:53,346 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 20:52:54,002 INFO L130 PetriNetUnfolder]: 196/1707 cut-off events. [2023-08-31 20:52:54,003 INFO L131 PetriNetUnfolder]: For 3627/3627 co-relation queries the response was YES. [2023-08-31 20:52:54,003 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 20:52:54,003 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 20:52:54,003 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 20:52:54,003 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 20:52:54,003 INFO L85 PathProgramCache]: Analyzing trace with hash -1684577418, now seen corresponding path program 1 times [2023-08-31 20:52:54,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 20:52:54,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598687495] [2023-08-31 20:52:54,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 20:52:54,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 20:52:54,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 20:52:54,044 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 20:52:54,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 20:52:54,101 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 20:52:54,101 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 20:52:54,101 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 20:52:54,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2023-08-31 20:52:54,101 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 20:52:54,102 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 20:52:54,102 WARN L233 ceAbstractionStarter]: 27 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 20:52:54,102 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 28 thread instances. [2023-08-31 20:52:54,212 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 20:52:54,222 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1841 places, 1956 transitions, 4808 flow [2023-08-31 20:52:56,593 INFO L130 PetriNetUnfolder]: 284/3323 cut-off events. [2023-08-31 20:52:56,593 INFO L131 PetriNetUnfolder]: For 4032/4032 co-relation queries the response was YES. [2023-08-31 20:52:56,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3814 conditions, 3323 events. 284/3323 cut-off events. For 4032/4032 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 17650 event pairs, 0 based on Foata normal form. 0/2726 useless extension candidates. Maximal degree in co-relation 3642. Up to 58 conditions per place. [2023-08-31 20:52:56,851 INFO L82 GeneralOperation]: Start removeDead. Operand has 1841 places, 1956 transitions, 4808 flow [2023-08-31 20:52:56,899 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1841 places, 1956 transitions, 4808 flow [2023-08-31 20:52:56,899 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 20:52:56,899 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1841 places, 1956 transitions, 4808 flow [2023-08-31 20:52:56,899 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1841 places, 1956 transitions, 4808 flow [2023-08-31 20:52:56,899 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1841 places, 1956 transitions, 4808 flow [2023-08-31 20:52:59,486 INFO L130 PetriNetUnfolder]: 284/3323 cut-off events. [2023-08-31 20:52:59,486 INFO L131 PetriNetUnfolder]: For 4032/4032 co-relation queries the response was YES. [2023-08-31 20:52:59,734 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3814 conditions, 3323 events. 284/3323 cut-off events. For 4032/4032 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 17650 event pairs, 0 based on Foata normal form. 0/2726 useless extension candidates. Maximal degree in co-relation 3642. Up to 58 conditions per place. [2023-08-31 20:53:00,653 INFO L119 LiptonReduction]: Number of co-enabled transitions 3527832 [2023-08-31 20:53:11,910 INFO L134 LiptonReduction]: Checked pairs total: 24575574 [2023-08-31 20:53:11,910 INFO L136 LiptonReduction]: Total number of compositions: 738 [2023-08-31 20:53:11,911 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 20:53:11,912 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;@25a23cca, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 20:53:11,912 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 20:53:12,626 INFO L130 PetriNetUnfolder]: 231/1801 cut-off events. [2023-08-31 20:53:12,626 INFO L131 PetriNetUnfolder]: For 4032/4032 co-relation queries the response was YES. [2023-08-31 20:53:12,626 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 20:53:12,626 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 20:53:12,627 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 20:53:12,627 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 20:53:12,627 INFO L85 PathProgramCache]: Analyzing trace with hash -1642428825, now seen corresponding path program 1 times [2023-08-31 20:53:12,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 20:53:12,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738185506] [2023-08-31 20:53:12,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 20:53:12,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 20:53:12,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 20:53:12,665 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 20:53:12,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 20:53:12,720 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 20:53:12,721 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 20:53:12,721 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 20:53:12,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2023-08-31 20:53:12,721 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 20:53:12,722 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 20:53:12,722 WARN L233 ceAbstractionStarter]: 28 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 20:53:12,722 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 29 thread instances. [2023-08-31 20:53:12,891 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 20:53:12,901 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1904 places, 2023 transitions, 5003 flow [2023-08-31 20:53:15,452 INFO L130 PetriNetUnfolder]: 294/3439 cut-off events. [2023-08-31 20:53:15,452 INFO L131 PetriNetUnfolder]: For 4466/4466 co-relation queries the response was YES. [2023-08-31 20:53:15,709 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3962 conditions, 3439 events. 294/3439 cut-off events. For 4466/4466 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 18389 event pairs, 0 based on Foata normal form. 0/2821 useless extension candidates. Maximal degree in co-relation 3789. Up to 60 conditions per place. [2023-08-31 20:53:15,709 INFO L82 GeneralOperation]: Start removeDead. Operand has 1904 places, 2023 transitions, 5003 flow [2023-08-31 20:53:15,755 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1904 places, 2023 transitions, 5003 flow [2023-08-31 20:53:15,756 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 20:53:15,756 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1904 places, 2023 transitions, 5003 flow [2023-08-31 20:53:15,756 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1904 places, 2023 transitions, 5003 flow [2023-08-31 20:53:15,757 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1904 places, 2023 transitions, 5003 flow [2023-08-31 20:53:18,915 INFO L130 PetriNetUnfolder]: 294/3439 cut-off events. [2023-08-31 20:53:18,915 INFO L131 PetriNetUnfolder]: For 4466/4466 co-relation queries the response was YES. [2023-08-31 20:53:19,159 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3962 conditions, 3439 events. 294/3439 cut-off events. For 4466/4466 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 18389 event pairs, 0 based on Foata normal form. 0/2821 useless extension candidates. Maximal degree in co-relation 3789. Up to 60 conditions per place. [2023-08-31 20:53:20,134 INFO L119 LiptonReduction]: Number of co-enabled transitions 3782064 [2023-08-31 20:53:31,351 INFO L134 LiptonReduction]: Checked pairs total: 23159370 [2023-08-31 20:53:31,351 INFO L136 LiptonReduction]: Total number of compositions: 752 [2023-08-31 20:53:31,353 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 20:53:31,353 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;@25a23cca, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 20:53:31,353 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 20:53:32,199 INFO L130 PetriNetUnfolder]: 240/1869 cut-off events. [2023-08-31 20:53:32,199 INFO L131 PetriNetUnfolder]: For 4466/4466 co-relation queries the response was YES. [2023-08-31 20:53:32,199 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 20:53:32,200 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 20:53:32,200 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 20:53:32,200 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 20:53:32,200 INFO L85 PathProgramCache]: Analyzing trace with hash -1173608867, now seen corresponding path program 1 times [2023-08-31 20:53:32,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 20:53:32,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3067325] [2023-08-31 20:53:32,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 20:53:32,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 20:53:32,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 20:53:32,242 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 20:53:32,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 20:53:32,303 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 20:53:32,303 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 20:53:32,304 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 20:53:32,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2023-08-31 20:53:32,304 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 20:53:32,304 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 20:53:32,304 WARN L233 ceAbstractionStarter]: 29 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 20:53:32,305 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 30 thread instances. [2023-08-31 20:53:32,425 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 20:53:32,440 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1967 places, 2090 transitions, 5200 flow [2023-08-31 20:53:35,177 INFO L130 PetriNetUnfolder]: 304/3555 cut-off events. [2023-08-31 20:53:35,177 INFO L131 PetriNetUnfolder]: For 4930/4930 co-relation queries the response was YES. [2023-08-31 20:53:35,439 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4111 conditions, 3555 events. 304/3555 cut-off events. For 4930/4930 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 18905 event pairs, 0 based on Foata normal form. 0/2916 useless extension candidates. Maximal degree in co-relation 3937. Up to 62 conditions per place. [2023-08-31 20:53:35,440 INFO L82 GeneralOperation]: Start removeDead. Operand has 1967 places, 2090 transitions, 5200 flow [2023-08-31 20:53:35,493 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1967 places, 2090 transitions, 5200 flow [2023-08-31 20:53:35,493 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 20:53:35,493 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1967 places, 2090 transitions, 5200 flow [2023-08-31 20:53:35,493 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1967 places, 2090 transitions, 5200 flow [2023-08-31 20:53:35,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1967 places, 2090 transitions, 5200 flow [2023-08-31 20:53:38,180 INFO L130 PetriNetUnfolder]: 304/3555 cut-off events. [2023-08-31 20:53:38,180 INFO L131 PetriNetUnfolder]: For 4930/4930 co-relation queries the response was YES. [2023-08-31 20:53:38,472 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4111 conditions, 3555 events. 304/3555 cut-off events. For 4930/4930 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 18905 event pairs, 0 based on Foata normal form. 0/2916 useless extension candidates. Maximal degree in co-relation 3937. Up to 62 conditions per place. [2023-08-31 20:53:39,566 INFO L119 LiptonReduction]: Number of co-enabled transitions 4045140 [2023-08-31 20:53:51,220 INFO L134 LiptonReduction]: Checked pairs total: 24914087 [2023-08-31 20:53:51,220 INFO L136 LiptonReduction]: Total number of compositions: 786 [2023-08-31 20:53:51,222 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 20:53:51,222 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;@25a23cca, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 20:53:51,222 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 20:53:52,052 INFO L130 PetriNetUnfolder]: 220/1908 cut-off events. [2023-08-31 20:53:52,053 INFO L131 PetriNetUnfolder]: For 4930/4930 co-relation queries the response was YES. [2023-08-31 20:53:52,053 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 20:53:52,053 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 20:53:52,053 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 20:53:52,053 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 20:53:52,053 INFO L85 PathProgramCache]: Analyzing trace with hash -124594242, now seen corresponding path program 1 times [2023-08-31 20:53:52,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 20:53:52,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713447458] [2023-08-31 20:53:52,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 20:53:52,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 20:53:52,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 20:53:52,107 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 20:53:52,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 20:53:52,176 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 20:53:52,177 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 20:53:52,177 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 20:53:52,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2023-08-31 20:53:52,177 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 20:53:52,178 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 20:53:52,178 WARN L233 ceAbstractionStarter]: 30 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 20:53:52,178 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 31 thread instances. [2023-08-31 20:53:52,329 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 20:53:52,338 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2030 places, 2157 transitions, 5399 flow [2023-08-31 20:53:55,294 INFO L130 PetriNetUnfolder]: 314/3671 cut-off events. [2023-08-31 20:53:55,294 INFO L131 PetriNetUnfolder]: For 5425/5425 co-relation queries the response was YES. [2023-08-31 20:53:55,589 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4261 conditions, 3671 events. 314/3671 cut-off events. For 5425/5425 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 19557 event pairs, 0 based on Foata normal form. 0/3011 useless extension candidates. Maximal degree in co-relation 4086. Up to 64 conditions per place. [2023-08-31 20:53:55,590 INFO L82 GeneralOperation]: Start removeDead. Operand has 2030 places, 2157 transitions, 5399 flow [2023-08-31 20:53:55,649 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 2030 places, 2157 transitions, 5399 flow [2023-08-31 20:53:55,649 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 20:53:55,649 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 2030 places, 2157 transitions, 5399 flow [2023-08-31 20:53:55,650 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 2030 places, 2157 transitions, 5399 flow [2023-08-31 20:53:55,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2030 places, 2157 transitions, 5399 flow [2023-08-31 20:53:58,752 INFO L130 PetriNetUnfolder]: 314/3671 cut-off events. [2023-08-31 20:53:58,753 INFO L131 PetriNetUnfolder]: For 5425/5425 co-relation queries the response was YES. [2023-08-31 20:53:59,033 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4261 conditions, 3671 events. 314/3671 cut-off events. For 5425/5425 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 19557 event pairs, 0 based on Foata normal form. 0/3011 useless extension candidates. Maximal degree in co-relation 4086. Up to 64 conditions per place. [2023-08-31 20:54:00,163 INFO L119 LiptonReduction]: Number of co-enabled transitions 4317060 [2023-08-31 20:54:12,461 INFO L134 LiptonReduction]: Checked pairs total: 26526638 [2023-08-31 20:54:12,461 INFO L136 LiptonReduction]: Total number of compositions: 805 [2023-08-31 20:54:12,463 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 20:54:12,463 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;@25a23cca, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 20:54:12,463 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 20:54:13,431 INFO L130 PetriNetUnfolder]: 258/2005 cut-off events. [2023-08-31 20:54:13,431 INFO L131 PetriNetUnfolder]: For 5425/5425 co-relation queries the response was YES. [2023-08-31 20:54:13,431 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 20:54:13,432 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 20:54:13,432 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 20:54:13,432 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 20:54:13,432 INFO L85 PathProgramCache]: Analyzing trace with hash 991246782, now seen corresponding path program 1 times [2023-08-31 20:54:13,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 20:54:13,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137073597] [2023-08-31 20:54:13,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 20:54:13,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 20:54:13,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 20:54:13,483 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 20:54:13,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 20:54:13,551 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 20:54:13,552 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 20:54:13,552 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 20:54:13,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2023-08-31 20:54:13,553 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 20:54:13,553 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 20:54:13,553 WARN L233 ceAbstractionStarter]: 31 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 20:54:13,553 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 32 thread instances. [2023-08-31 20:54:13,666 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 20:54:13,675 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2093 places, 2224 transitions, 5600 flow [2023-08-31 20:54:16,801 INFO L130 PetriNetUnfolder]: 324/3787 cut-off events. [2023-08-31 20:54:16,802 INFO L131 PetriNetUnfolder]: For 5952/5952 co-relation queries the response was YES. [2023-08-31 20:54:17,113 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4412 conditions, 3787 events. 324/3787 cut-off events. For 5952/5952 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 20179 event pairs, 0 based on Foata normal form. 0/3106 useless extension candidates. Maximal degree in co-relation 4236. Up to 66 conditions per place. [2023-08-31 20:54:17,113 INFO L82 GeneralOperation]: Start removeDead. Operand has 2093 places, 2224 transitions, 5600 flow [2023-08-31 20:54:17,169 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 2093 places, 2224 transitions, 5600 flow [2023-08-31 20:54:17,170 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 20:54:17,170 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 2093 places, 2224 transitions, 5600 flow [2023-08-31 20:54:17,170 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 2093 places, 2224 transitions, 5600 flow [2023-08-31 20:54:17,170 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2093 places, 2224 transitions, 5600 flow [2023-08-31 20:54:20,405 INFO L130 PetriNetUnfolder]: 324/3787 cut-off events. [2023-08-31 20:54:20,405 INFO L131 PetriNetUnfolder]: For 5952/5952 co-relation queries the response was YES. [2023-08-31 20:54:20,712 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4412 conditions, 3787 events. 324/3787 cut-off events. For 5952/5952 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 20179 event pairs, 0 based on Foata normal form. 0/3106 useless extension candidates. Maximal degree in co-relation 4236. Up to 66 conditions per place. [2023-08-31 20:54:21,896 INFO L119 LiptonReduction]: Number of co-enabled transitions 4597824 [2023-08-31 20:54:34,594 INFO L134 LiptonReduction]: Checked pairs total: 28322982 [2023-08-31 20:54:34,594 INFO L136 LiptonReduction]: Total number of compositions: 827 [2023-08-31 20:54:34,595 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 20:54:34,595 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;@25a23cca, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 20:54:34,596 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 20:54:35,564 INFO L130 PetriNetUnfolder]: 236/2042 cut-off events. [2023-08-31 20:54:35,564 INFO L131 PetriNetUnfolder]: For 5952/5952 co-relation queries the response was YES. [2023-08-31 20:54:35,565 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 20:54:35,565 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 20:54:35,565 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 20:54:35,565 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 20:54:35,565 INFO L85 PathProgramCache]: Analyzing trace with hash -2062137392, now seen corresponding path program 1 times [2023-08-31 20:54:35,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 20:54:35,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763107742] [2023-08-31 20:54:35,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 20:54:35,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 20:54:35,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 20:54:35,614 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 20:54:35,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 20:54:35,685 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 20:54:35,686 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 20:54:35,686 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 20:54:35,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2023-08-31 20:54:35,686 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 20:54:35,686 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 20:54:35,687 WARN L233 ceAbstractionStarter]: 32 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 20:54:35,687 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 33 thread instances. [2023-08-31 20:54:35,819 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 20:54:35,830 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2156 places, 2291 transitions, 5803 flow [2023-08-31 20:54:39,427 INFO L130 PetriNetUnfolder]: 334/3903 cut-off events. [2023-08-31 20:54:39,427 INFO L131 PetriNetUnfolder]: For 6512/6512 co-relation queries the response was YES. [2023-08-31 20:54:39,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4564 conditions, 3903 events. 334/3903 cut-off events. For 6512/6512 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 20824 event pairs, 0 based on Foata normal form. 0/3201 useless extension candidates. Maximal degree in co-relation 4387. Up to 68 conditions per place. [2023-08-31 20:54:39,772 INFO L82 GeneralOperation]: Start removeDead. Operand has 2156 places, 2291 transitions, 5803 flow [2023-08-31 20:54:39,833 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 2156 places, 2291 transitions, 5803 flow [2023-08-31 20:54:39,833 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 20:54:39,833 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 2156 places, 2291 transitions, 5803 flow [2023-08-31 20:54:39,833 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 2156 places, 2291 transitions, 5803 flow [2023-08-31 20:54:39,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2156 places, 2291 transitions, 5803 flow [2023-08-31 20:54:43,272 INFO L130 PetriNetUnfolder]: 334/3903 cut-off events. [2023-08-31 20:54:43,273 INFO L131 PetriNetUnfolder]: For 6512/6512 co-relation queries the response was YES. [2023-08-31 20:54:43,619 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4564 conditions, 3903 events. 334/3903 cut-off events. For 6512/6512 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 20824 event pairs, 0 based on Foata normal form. 0/3201 useless extension candidates. Maximal degree in co-relation 4387. Up to 68 conditions per place. [2023-08-31 20:54:44,881 INFO L119 LiptonReduction]: Number of co-enabled transitions 4887432 [2023-08-31 20:54:58,235 INFO L134 LiptonReduction]: Checked pairs total: 30118494 [2023-08-31 20:54:58,235 INFO L136 LiptonReduction]: Total number of compositions: 853 [2023-08-31 20:54:58,237 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 20:54:58,237 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;@25a23cca, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 20:54:58,237 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 20:54:59,553 INFO L130 PetriNetUnfolder]: 276/2141 cut-off events. [2023-08-31 20:54:59,553 INFO L131 PetriNetUnfolder]: For 6512/6512 co-relation queries the response was YES. [2023-08-31 20:54:59,553 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 20:54:59,553 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 20:54:59,554 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 20:54:59,554 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 20:54:59,554 INFO L85 PathProgramCache]: Analyzing trace with hash 1893242001, now seen corresponding path program 1 times [2023-08-31 20:54:59,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 20:54:59,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589144515] [2023-08-31 20:54:59,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 20:54:59,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 20:54:59,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 20:54:59,617 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 20:54:59,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 20:54:59,689 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 20:54:59,690 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 20:54:59,690 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 20:54:59,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2023-08-31 20:54:59,690 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 20:54:59,691 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 20:54:59,691 WARN L233 ceAbstractionStarter]: 33 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 20:54:59,691 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 34 thread instances. [2023-08-31 20:54:59,828 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 20:54:59,839 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2219 places, 2358 transitions, 6008 flow [2023-08-31 20:55:03,576 INFO L130 PetriNetUnfolder]: 344/4019 cut-off events. [2023-08-31 20:55:03,576 INFO L131 PetriNetUnfolder]: For 7106/7106 co-relation queries the response was YES. [2023-08-31 20:55:03,937 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4717 conditions, 4019 events. 344/4019 cut-off events. For 7106/7106 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 21480 event pairs, 0 based on Foata normal form. 0/3296 useless extension candidates. Maximal degree in co-relation 4539. Up to 70 conditions per place. [2023-08-31 20:55:03,937 INFO L82 GeneralOperation]: Start removeDead. Operand has 2219 places, 2358 transitions, 6008 flow [2023-08-31 20:55:03,999 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 2219 places, 2358 transitions, 6008 flow [2023-08-31 20:55:03,999 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 20:55:03,999 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 2219 places, 2358 transitions, 6008 flow [2023-08-31 20:55:03,999 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 2219 places, 2358 transitions, 6008 flow [2023-08-31 20:55:03,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2219 places, 2358 transitions, 6008 flow [2023-08-31 20:55:07,737 INFO L130 PetriNetUnfolder]: 344/4019 cut-off events. [2023-08-31 20:55:07,737 INFO L131 PetriNetUnfolder]: For 7106/7106 co-relation queries the response was YES. [2023-08-31 20:55:08,101 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4717 conditions, 4019 events. 344/4019 cut-off events. For 7106/7106 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 21480 event pairs, 0 based on Foata normal form. 0/3296 useless extension candidates. Maximal degree in co-relation 4539. Up to 70 conditions per place. [2023-08-31 20:55:09,444 INFO L119 LiptonReduction]: Number of co-enabled transitions 5185884 [2023-08-31 20:55:24,189 INFO L134 LiptonReduction]: Checked pairs total: 32016800 [2023-08-31 20:55:24,189 INFO L136 LiptonReduction]: Total number of compositions: 882 [2023-08-31 20:55:24,191 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 20:55:24,191 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;@25a23cca, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 20:55:24,191 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 20:55:25,397 INFO L130 PetriNetUnfolder]: 285/2209 cut-off events. [2023-08-31 20:55:25,397 INFO L131 PetriNetUnfolder]: For 7106/7106 co-relation queries the response was YES. [2023-08-31 20:55:25,397 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 20:55:25,397 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 20:55:25,398 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 20:55:25,398 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 20:55:25,398 INFO L85 PathProgramCache]: Analyzing trace with hash 1065967359, now seen corresponding path program 1 times [2023-08-31 20:55:25,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 20:55:25,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767004527] [2023-08-31 20:55:25,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 20:55:25,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 20:55:25,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 20:55:25,453 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 20:55:25,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 20:55:25,531 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 20:55:25,532 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 20:55:25,532 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 20:55:25,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2023-08-31 20:55:25,532 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 20:55:25,532 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 20:55:25,533 WARN L233 ceAbstractionStarter]: 34 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 20:55:25,533 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 35 thread instances. [2023-08-31 20:55:25,668 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 20:55:25,678 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2282 places, 2425 transitions, 6215 flow [2023-08-31 20:55:29,553 INFO L130 PetriNetUnfolder]: 354/4135 cut-off events. [2023-08-31 20:55:29,553 INFO L131 PetriNetUnfolder]: For 7735/7735 co-relation queries the response was YES. [2023-08-31 20:55:29,960 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4871 conditions, 4135 events. 354/4135 cut-off events. For 7735/7735 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 22183 event pairs, 0 based on Foata normal form. 0/3391 useless extension candidates. Maximal degree in co-relation 4692. Up to 72 conditions per place. [2023-08-31 20:55:29,960 INFO L82 GeneralOperation]: Start removeDead. Operand has 2282 places, 2425 transitions, 6215 flow [2023-08-31 20:55:30,033 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 2282 places, 2425 transitions, 6215 flow [2023-08-31 20:55:30,033 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 20:55:30,033 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 2282 places, 2425 transitions, 6215 flow [2023-08-31 20:55:30,034 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 2282 places, 2425 transitions, 6215 flow [2023-08-31 20:55:30,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2282 places, 2425 transitions, 6215 flow [2023-08-31 20:55:33,904 INFO L130 PetriNetUnfolder]: 354/4135 cut-off events. [2023-08-31 20:55:33,905 INFO L131 PetriNetUnfolder]: For 7735/7735 co-relation queries the response was YES. [2023-08-31 20:55:34,322 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4871 conditions, 4135 events. 354/4135 cut-off events. For 7735/7735 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 22183 event pairs, 0 based on Foata normal form. 0/3391 useless extension candidates. Maximal degree in co-relation 4692. Up to 72 conditions per place.