./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/no-data-race.prp --file ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_20-callback_racefree.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_20-callback_racefree.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 4e91816f101a416d37c086dd7185cfb4e2bfa63eb286e4a418cb94db27cf2f6f --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 20:49:01,052 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-31 20:49:01,053 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-31 20:49:01,090 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-31 20:49:01,091 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-31 20:49:01,093 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-31 20:49:01,096 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-31 20:49:01,099 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-31 20:49:01,101 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-31 20:49:01,106 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-31 20:49:01,107 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-31 20:49:01,109 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-31 20:49:01,110 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-31 20:49:01,112 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-31 20:49:01,113 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-31 20:49:01,118 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-31 20:49:01,120 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-31 20:49:01,121 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-31 20:49:01,123 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-31 20:49:01,128 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-31 20:49:01,129 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-31 20:49:01,130 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-31 20:49:01,131 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-31 20:49:01,132 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-31 20:49:01,139 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-31 20:49:01,139 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-31 20:49:01,139 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-31 20:49:01,141 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-31 20:49:01,142 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-31 20:49:01,142 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-31 20:49:01,143 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-31 20:49:01,145 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-31 20:49:01,146 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-31 20:49:01,147 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-31 20:49:01,148 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-31 20:49:01,148 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-31 20:49:01,148 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-31 20:49:01,149 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-31 20:49:01,149 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-31 20:49:01,150 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-31 20:49:01,150 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-31 20:49:01,152 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DataRace-32bit-Automizer_Default.epf [2023-08-31 20:49:01,192 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-31 20:49:01,192 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-31 20:49:01,193 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-31 20:49:01,193 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-31 20:49:01,194 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-31 20:49:01,194 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-31 20:49:01,195 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-31 20:49:01,195 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-31 20:49:01,195 INFO L138 SettingsManager]: * Use SBE=true [2023-08-31 20:49:01,196 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-31 20:49:01,196 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-31 20:49:01,197 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-31 20:49:01,197 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-31 20:49:01,197 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-31 20:49:01,197 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-31 20:49:01,197 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-31 20:49:01,198 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-31 20:49:01,198 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-31 20:49:01,198 INFO L138 SettingsManager]: * Check absence of data races in concurrent programs=true [2023-08-31 20:49:01,198 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-31 20:49:01,198 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-31 20:49:01,198 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-31 20:49:01,199 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-31 20:49:01,199 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-31 20:49:01,199 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-31 20:49:01,199 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-31 20:49:01,199 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 20:49:01,200 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-31 20:49:01,200 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-31 20:49:01,200 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-31 20:49:01,200 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-31 20:49:01,200 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-31 20:49:01,201 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-31 20:49:01,201 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-31 20:49:01,201 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-31 20:49:01,201 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-31 20:49:01,202 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-31 20:49:01,202 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! data-race) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4e91816f101a416d37c086dd7185cfb4e2bfa63eb286e4a418cb94db27cf2f6f Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-08-31 20:49:01,499 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-31 20:49:01,523 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-31 20:49:01,526 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-31 20:49:01,527 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-31 20:49:01,527 INFO L275 PluginConnector]: CDTParser initialized [2023-08-31 20:49:01,528 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_20-callback_racefree.i [2023-08-31 20:49:02,651 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-31 20:49:02,926 INFO L351 CDTParser]: Found 1 translation units. [2023-08-31 20:49:02,926 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_20-callback_racefree.i [2023-08-31 20:49:02,946 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a7a775eeb/690a6a5b26634304bd800a49eab5a5a8/FLAGc63e8124e [2023-08-31 20:49:02,964 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a7a775eeb/690a6a5b26634304bd800a49eab5a5a8 [2023-08-31 20:49:02,966 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-31 20:49:02,968 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-31 20:49:02,970 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-31 20:49:02,970 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-31 20:49:02,972 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-31 20:49:02,973 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 08:49:02" (1/1) ... [2023-08-31 20:49:02,974 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@40ad6af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 08:49:02, skipping insertion in model container [2023-08-31 20:49:02,974 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 08:49:02" (1/1) ... [2023-08-31 20:49:02,980 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-31 20:49:03,011 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-31 20:49:03,311 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_20-callback_racefree.i[30212,30225] [2023-08-31 20:49:03,336 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 20:49:03,354 INFO L203 MainTranslator]: Completed pre-run [2023-08-31 20:49:03,392 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_20-callback_racefree.i[30212,30225] [2023-08-31 20:49:03,408 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 20:49:03,440 WARN L667 CHandler]: The function callback is called, but not defined or handled by StandardFunctionHandler. [2023-08-31 20:49:03,446 INFO L208 MainTranslator]: Completed translation [2023-08-31 20:49:03,446 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 08:49:03 WrapperNode [2023-08-31 20:49:03,447 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-31 20:49:03,448 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-31 20:49:03,448 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-31 20:49:03,448 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-31 20:49:03,454 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 08:49:03" (1/1) ... [2023-08-31 20:49:03,473 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 08:49:03" (1/1) ... [2023-08-31 20:49:03,519 INFO L138 Inliner]: procedures = 173, calls = 33, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 154 [2023-08-31 20:49:03,520 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-31 20:49:03,521 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-31 20:49:03,521 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-31 20:49:03,521 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-31 20:49:03,528 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 08:49:03" (1/1) ... [2023-08-31 20:49:03,528 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 08:49:03" (1/1) ... [2023-08-31 20:49:03,531 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 08:49:03" (1/1) ... [2023-08-31 20:49:03,531 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 08:49:03" (1/1) ... [2023-08-31 20:49:03,537 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 08:49:03" (1/1) ... [2023-08-31 20:49:03,540 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 08:49:03" (1/1) ... [2023-08-31 20:49:03,541 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 08:49:03" (1/1) ... [2023-08-31 20:49:03,543 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 08:49:03" (1/1) ... [2023-08-31 20:49:03,545 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-31 20:49:03,546 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-31 20:49:03,546 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-31 20:49:03,546 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-31 20:49:03,546 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 08:49:03" (1/1) ... [2023-08-31 20:49:03,551 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 20:49:03,562 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 20:49:03,573 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 20:49:03,583 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 20:49:03,607 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-31 20:49:03,608 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-31 20:49:03,608 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-31 20:49:03,608 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-31 20:49:03,608 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-31 20:49:03,608 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-08-31 20:49:03,609 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-08-31 20:49:03,609 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-31 20:49:03,609 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-31 20:49:03,609 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-31 20:49:03,609 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-31 20:49:03,610 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 20:49:03,740 INFO L236 CfgBuilder]: Building ICFG [2023-08-31 20:49:03,741 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-31 20:49:04,008 INFO L277 CfgBuilder]: Performing block encoding [2023-08-31 20:49:04,022 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-31 20:49:04,025 INFO L302 CfgBuilder]: Removed 11 assume(true) statements. [2023-08-31 20:49:04,027 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 08:49:04 BoogieIcfgContainer [2023-08-31 20:49:04,029 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-31 20:49:04,032 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-31 20:49:04,032 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-31 20:49:04,035 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-31 20:49:04,035 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.08 08:49:02" (1/3) ... [2023-08-31 20:49:04,036 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45cf814b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 08:49:04, skipping insertion in model container [2023-08-31 20:49:04,036 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 08:49:03" (2/3) ... [2023-08-31 20:49:04,036 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45cf814b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 08:49:04, skipping insertion in model container [2023-08-31 20:49:04,037 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 08:49:04" (3/3) ... [2023-08-31 20:49:04,038 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_20-callback_racefree.i [2023-08-31 20:49:04,045 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-31 20:49:04,053 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-31 20:49:04,053 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2023-08-31 20:49:04,053 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-31 20:49:04,135 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-08-31 20:49:04,181 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 149 places, 161 transitions, 330 flow [2023-08-31 20:49:04,289 INFO L130 PetriNetUnfolder]: 26/253 cut-off events. [2023-08-31 20:49:04,289 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-08-31 20:49:04,296 INFO L83 FinitePrefix]: Finished finitePrefix Result has 259 conditions, 253 events. 26/253 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 762 event pairs, 0 based on Foata normal form. 0/213 useless extension candidates. Maximal degree in co-relation 127. Up to 6 conditions per place. [2023-08-31 20:49:04,297 INFO L82 GeneralOperation]: Start removeDead. Operand has 149 places, 161 transitions, 330 flow [2023-08-31 20:49:04,303 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 145 places, 156 transitions, 317 flow [2023-08-31 20:49:04,307 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 20:49:04,321 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 145 places, 156 transitions, 317 flow [2023-08-31 20:49:04,328 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 145 places, 156 transitions, 317 flow [2023-08-31 20:49:04,341 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 145 places, 156 transitions, 317 flow [2023-08-31 20:49:04,391 INFO L130 PetriNetUnfolder]: 25/248 cut-off events. [2023-08-31 20:49:04,392 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-31 20:49:04,394 INFO L83 FinitePrefix]: Finished finitePrefix Result has 253 conditions, 248 events. 25/248 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 715 event pairs, 0 based on Foata normal form. 0/208 useless extension candidates. Maximal degree in co-relation 127. Up to 6 conditions per place. [2023-08-31 20:49:04,398 INFO L119 LiptonReduction]: Number of co-enabled transitions 4312 [2023-08-31 20:49:07,668 INFO L134 LiptonReduction]: Checked pairs total: 9049 [2023-08-31 20:49:07,669 INFO L136 LiptonReduction]: Total number of compositions: 128 [2023-08-31 20:49:07,681 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 20:49:07,686 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;@3a1eb398, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 20:49:07,687 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 20:49:07,691 INFO L130 PetriNetUnfolder]: 3/21 cut-off events. [2023-08-31 20:49:07,691 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-31 20:49:07,691 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 20:49:07,692 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-31 20:49:07,692 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 20:49:07,696 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 20:49:07,696 INFO L85 PathProgramCache]: Analyzing trace with hash -335009166, now seen corresponding path program 1 times [2023-08-31 20:49:07,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 20:49:07,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846646854] [2023-08-31 20:49:07,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 20:49:07,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 20:49:07,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 20:49:07,799 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 20:49:07,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 20:49:07,851 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 20:49:07,853 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 20:49:07,854 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 20:49:07,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-31 20:49:07,857 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 20:49:07,861 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 20:49:07,863 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 20:49:07,863 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-31 20:49:07,893 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-31 20:49:07,896 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 171 places, 185 transitions, 388 flow [2023-08-31 20:49:07,933 INFO L130 PetriNetUnfolder]: 43/399 cut-off events. [2023-08-31 20:49:07,934 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-31 20:49:07,937 INFO L83 FinitePrefix]: Finished finitePrefix Result has 413 conditions, 399 events. 43/399 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1547 event pairs, 0 based on Foata normal form. 0/334 useless extension candidates. Maximal degree in co-relation 255. Up to 9 conditions per place. [2023-08-31 20:49:07,937 INFO L82 GeneralOperation]: Start removeDead. Operand has 171 places, 185 transitions, 388 flow [2023-08-31 20:49:07,939 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 171 places, 185 transitions, 388 flow [2023-08-31 20:49:07,939 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 20:49:07,939 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 171 places, 185 transitions, 388 flow [2023-08-31 20:49:07,940 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 171 places, 185 transitions, 388 flow [2023-08-31 20:49:07,940 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 171 places, 185 transitions, 388 flow [2023-08-31 20:49:07,974 INFO L130 PetriNetUnfolder]: 43/399 cut-off events. [2023-08-31 20:49:07,974 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-31 20:49:07,977 INFO L83 FinitePrefix]: Finished finitePrefix Result has 413 conditions, 399 events. 43/399 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1547 event pairs, 0 based on Foata normal form. 0/334 useless extension candidates. Maximal degree in co-relation 255. Up to 9 conditions per place. [2023-08-31 20:49:07,984 INFO L119 LiptonReduction]: Number of co-enabled transitions 10076 [2023-08-31 20:49:11,102 INFO L134 LiptonReduction]: Checked pairs total: 27029 [2023-08-31 20:49:11,102 INFO L136 LiptonReduction]: Total number of compositions: 142 [2023-08-31 20:49:11,104 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 20:49:11,105 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;@3a1eb398, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 20:49:11,106 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 20:49:11,112 INFO L130 PetriNetUnfolder]: 14/74 cut-off events. [2023-08-31 20:49:11,112 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-31 20:49:11,112 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 20:49:11,112 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-31 20:49:11,113 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 20:49:11,113 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 20:49:11,113 INFO L85 PathProgramCache]: Analyzing trace with hash -37895920, now seen corresponding path program 1 times [2023-08-31 20:49:11,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 20:49:11,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699471827] [2023-08-31 20:49:11,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 20:49:11,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 20:49:11,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 20:49:11,146 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 20:49:11,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 20:49:11,169 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 20:49:11,169 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 20:49:11,170 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 20:49:11,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-31 20:49:11,170 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 20:49:11,171 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 20:49:11,171 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 20:49:11,171 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-31 20:49:11,187 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-31 20:49:11,190 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 193 places, 209 transitions, 448 flow [2023-08-31 20:49:11,245 INFO L130 PetriNetUnfolder]: 65/588 cut-off events. [2023-08-31 20:49:11,245 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-31 20:49:11,249 INFO L83 FinitePrefix]: Finished finitePrefix Result has 616 conditions, 588 events. 65/588 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2592 event pairs, 1 based on Foata normal form. 0/492 useless extension candidates. Maximal degree in co-relation 407. Up to 16 conditions per place. [2023-08-31 20:49:11,249 INFO L82 GeneralOperation]: Start removeDead. Operand has 193 places, 209 transitions, 448 flow [2023-08-31 20:49:11,274 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 193 places, 209 transitions, 448 flow [2023-08-31 20:49:11,274 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 20:49:11,274 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 193 places, 209 transitions, 448 flow [2023-08-31 20:49:11,275 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 193 places, 209 transitions, 448 flow [2023-08-31 20:49:11,275 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 193 places, 209 transitions, 448 flow [2023-08-31 20:49:11,327 INFO L130 PetriNetUnfolder]: 65/588 cut-off events. [2023-08-31 20:49:11,328 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-08-31 20:49:11,332 INFO L83 FinitePrefix]: Finished finitePrefix Result has 616 conditions, 588 events. 65/588 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2592 event pairs, 1 based on Foata normal form. 0/492 useless extension candidates. Maximal degree in co-relation 407. Up to 16 conditions per place. [2023-08-31 20:49:11,347 INFO L119 LiptonReduction]: Number of co-enabled transitions 16764 [2023-08-31 20:49:14,255 INFO L134 LiptonReduction]: Checked pairs total: 39948 [2023-08-31 20:49:14,255 INFO L136 LiptonReduction]: Total number of compositions: 159 [2023-08-31 20:49:14,257 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 20:49:14,258 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;@3a1eb398, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 20:49:14,258 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 20:49:14,267 INFO L130 PetriNetUnfolder]: 28/135 cut-off events. [2023-08-31 20:49:14,267 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2023-08-31 20:49:14,267 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 20:49:14,267 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-08-31 20:49:14,267 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 20:49:14,268 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 20:49:14,268 INFO L85 PathProgramCache]: Analyzing trace with hash 1172197733, now seen corresponding path program 1 times [2023-08-31 20:49:14,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 20:49:14,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477475586] [2023-08-31 20:49:14,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 20:49:14,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 20:49:14,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 20:49:14,304 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 20:49:14,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 20:49:14,326 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 20:49:14,327 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 20:49:14,327 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 20:49:14,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-31 20:49:14,327 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 20:49:14,328 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 20:49:14,328 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 20:49:14,328 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-08-31 20:49:14,346 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-31 20:49:14,349 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 215 places, 233 transitions, 510 flow [2023-08-31 20:49:14,437 INFO L130 PetriNetUnfolder]: 99/865 cut-off events. [2023-08-31 20:49:14,437 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-08-31 20:49:14,445 INFO L83 FinitePrefix]: Finished finitePrefix Result has 920 conditions, 865 events. 99/865 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 4132 event pairs, 6 based on Foata normal form. 0/726 useless extension candidates. Maximal degree in co-relation 608. Up to 32 conditions per place. [2023-08-31 20:49:14,445 INFO L82 GeneralOperation]: Start removeDead. Operand has 215 places, 233 transitions, 510 flow [2023-08-31 20:49:14,450 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 215 places, 233 transitions, 510 flow [2023-08-31 20:49:14,450 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 20:49:14,450 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 215 places, 233 transitions, 510 flow [2023-08-31 20:49:14,451 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 215 places, 233 transitions, 510 flow [2023-08-31 20:49:14,451 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 215 places, 233 transitions, 510 flow [2023-08-31 20:49:14,552 INFO L130 PetriNetUnfolder]: 99/865 cut-off events. [2023-08-31 20:49:14,552 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-08-31 20:49:14,559 INFO L83 FinitePrefix]: Finished finitePrefix Result has 920 conditions, 865 events. 99/865 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 4132 event pairs, 6 based on Foata normal form. 0/726 useless extension candidates. Maximal degree in co-relation 608. Up to 32 conditions per place. [2023-08-31 20:49:14,578 INFO L119 LiptonReduction]: Number of co-enabled transitions 24552 [2023-08-31 20:49:17,533 INFO L134 LiptonReduction]: Checked pairs total: 59827 [2023-08-31 20:49:17,534 INFO L136 LiptonReduction]: Total number of compositions: 172 [2023-08-31 20:49:17,536 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 20:49:17,536 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;@3a1eb398, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 20:49:17,537 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 20:49:17,548 INFO L130 PetriNetUnfolder]: 41/195 cut-off events. [2023-08-31 20:49:17,548 INFO L131 PetriNetUnfolder]: For 23/23 co-relation queries the response was YES. [2023-08-31 20:49:17,549 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 20:49:17,549 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2023-08-31 20:49:17,549 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 20:49:17,550 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 20:49:17,550 INFO L85 PathProgramCache]: Analyzing trace with hash 1767349247, now seen corresponding path program 1 times [2023-08-31 20:49:17,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 20:49:17,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200098242] [2023-08-31 20:49:17,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 20:49:17,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 20:49:17,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 20:49:17,590 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 20:49:17,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 20:49:17,630 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 20:49:17,635 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 20:49:17,635 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 20:49:17,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-31 20:49:17,636 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 20:49:17,636 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 20:49:17,637 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 20:49:17,637 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-08-31 20:49:17,667 INFO L144 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2023-08-31 20:49:17,670 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 237 places, 257 transitions, 574 flow [2023-08-31 20:49:17,826 INFO L130 PetriNetUnfolder]: 161/1322 cut-off events. [2023-08-31 20:49:17,827 INFO L131 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2023-08-31 20:49:17,842 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1433 conditions, 1322 events. 161/1322 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 7077 event pairs, 23 based on Foata normal form. 0/1116 useless extension candidates. Maximal degree in co-relation 910. Up to 80 conditions per place. [2023-08-31 20:49:17,842 INFO L82 GeneralOperation]: Start removeDead. Operand has 237 places, 257 transitions, 574 flow [2023-08-31 20:49:17,850 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 237 places, 257 transitions, 574 flow [2023-08-31 20:49:17,850 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 20:49:17,850 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 237 places, 257 transitions, 574 flow [2023-08-31 20:49:17,851 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 237 places, 257 transitions, 574 flow [2023-08-31 20:49:17,851 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 237 places, 257 transitions, 574 flow [2023-08-31 20:49:17,992 INFO L130 PetriNetUnfolder]: 161/1322 cut-off events. [2023-08-31 20:49:17,992 INFO L131 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2023-08-31 20:49:18,005 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1433 conditions, 1322 events. 161/1322 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 7077 event pairs, 23 based on Foata normal form. 0/1116 useless extension candidates. Maximal degree in co-relation 910. Up to 80 conditions per place. [2023-08-31 20:49:18,036 INFO L119 LiptonReduction]: Number of co-enabled transitions 33440 [2023-08-31 20:49:21,061 INFO L134 LiptonReduction]: Checked pairs total: 86708 [2023-08-31 20:49:21,061 INFO L136 LiptonReduction]: Total number of compositions: 189 [2023-08-31 20:49:21,063 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 20:49:21,064 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;@3a1eb398, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 20:49:21,065 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 20:49:21,082 INFO L130 PetriNetUnfolder]: 52/251 cut-off events. [2023-08-31 20:49:21,082 INFO L131 PetriNetUnfolder]: For 45/45 co-relation queries the response was YES. [2023-08-31 20:49:21,082 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 20:49:21,082 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 20:49:21,082 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 20:49:21,083 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 20:49:21,083 INFO L85 PathProgramCache]: Analyzing trace with hash 1684043934, now seen corresponding path program 1 times [2023-08-31 20:49:21,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 20:49:21,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538766035] [2023-08-31 20:49:21,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 20:49:21,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 20:49:21,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 20:49:21,132 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 20:49:21,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 20:49:21,168 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 20:49:21,172 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 20:49:21,172 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 20:49:21,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-31 20:49:21,172 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 20:49:21,173 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 20:49:21,173 WARN L233 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 20:49:21,173 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2023-08-31 20:49:21,190 INFO L144 ThreadInstanceAdder]: Constructed 6 joinOtherThreadTransitions. [2023-08-31 20:49:21,192 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 259 places, 281 transitions, 640 flow [2023-08-31 20:49:21,468 INFO L130 PetriNetUnfolder]: 287/2147 cut-off events. [2023-08-31 20:49:21,468 INFO L131 PetriNetUnfolder]: For 242/242 co-relation queries the response was YES. [2023-08-31 20:49:21,487 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2379 conditions, 2147 events. 287/2147 cut-off events. For 242/242 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 13417 event pairs, 72 based on Foata normal form. 0/1826 useless extension candidates. Maximal degree in co-relation 1421. Up to 192 conditions per place. [2023-08-31 20:49:21,487 INFO L82 GeneralOperation]: Start removeDead. Operand has 259 places, 281 transitions, 640 flow [2023-08-31 20:49:21,497 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 259 places, 281 transitions, 640 flow [2023-08-31 20:49:21,498 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 20:49:21,498 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 259 places, 281 transitions, 640 flow [2023-08-31 20:49:21,498 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 259 places, 281 transitions, 640 flow [2023-08-31 20:49:21,498 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 259 places, 281 transitions, 640 flow [2023-08-31 20:49:21,834 INFO L130 PetriNetUnfolder]: 287/2147 cut-off events. [2023-08-31 20:49:21,834 INFO L131 PetriNetUnfolder]: For 242/242 co-relation queries the response was YES. [2023-08-31 20:49:21,853 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2379 conditions, 2147 events. 287/2147 cut-off events. For 242/242 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 13417 event pairs, 72 based on Foata normal form. 0/1826 useless extension candidates. Maximal degree in co-relation 1421. Up to 192 conditions per place. [2023-08-31 20:49:21,909 INFO L119 LiptonReduction]: Number of co-enabled transitions 43428 [2023-08-31 20:49:25,046 INFO L134 LiptonReduction]: Checked pairs total: 128997 [2023-08-31 20:49:25,046 INFO L136 LiptonReduction]: Total number of compositions: 205 [2023-08-31 20:49:25,048 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 20:49:25,049 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;@3a1eb398, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 20:49:25,049 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 20:49:25,071 INFO L130 PetriNetUnfolder]: 71/334 cut-off events. [2023-08-31 20:49:25,071 INFO L131 PetriNetUnfolder]: For 79/79 co-relation queries the response was YES. [2023-08-31 20:49:25,071 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 20:49:25,072 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 20:49:25,072 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 20:49:25,072 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 20:49:25,072 INFO L85 PathProgramCache]: Analyzing trace with hash -1245414027, now seen corresponding path program 1 times [2023-08-31 20:49:25,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 20:49:25,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137563614] [2023-08-31 20:49:25,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 20:49:25,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 20:49:25,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 20:49:25,095 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 20:49:25,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 20:49:25,116 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 20:49:25,116 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 20:49:25,117 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 20:49:25,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-31 20:49:25,117 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 20:49:25,117 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 20:49:25,118 WARN L233 ceAbstractionStarter]: 6 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 20:49:25,118 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 7 thread instances. [2023-08-31 20:49:25,139 INFO L144 ThreadInstanceAdder]: Constructed 7 joinOtherThreadTransitions. [2023-08-31 20:49:25,141 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 281 places, 305 transitions, 708 flow [2023-08-31 20:49:25,733 INFO L130 PetriNetUnfolder]: 557/3724 cut-off events. [2023-08-31 20:49:25,733 INFO L131 PetriNetUnfolder]: For 525/525 co-relation queries the response was YES. [2023-08-31 20:49:25,781 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4222 conditions, 3724 events. 557/3724 cut-off events. For 525/525 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 27527 event pairs, 201 based on Foata normal form. 0/3192 useless extension candidates. Maximal degree in co-relation 2365. Up to 448 conditions per place. [2023-08-31 20:49:25,781 INFO L82 GeneralOperation]: Start removeDead. Operand has 281 places, 305 transitions, 708 flow [2023-08-31 20:49:25,801 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 281 places, 305 transitions, 708 flow [2023-08-31 20:49:25,801 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 20:49:25,801 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 281 places, 305 transitions, 708 flow [2023-08-31 20:49:25,802 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 281 places, 305 transitions, 708 flow [2023-08-31 20:49:25,802 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 281 places, 305 transitions, 708 flow [2023-08-31 20:49:26,435 INFO L130 PetriNetUnfolder]: 557/3724 cut-off events. [2023-08-31 20:49:26,436 INFO L131 PetriNetUnfolder]: For 525/525 co-relation queries the response was YES. [2023-08-31 20:49:26,474 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4222 conditions, 3724 events. 557/3724 cut-off events. For 525/525 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 27527 event pairs, 201 based on Foata normal form. 0/3192 useless extension candidates. Maximal degree in co-relation 2365. Up to 448 conditions per place. [2023-08-31 20:49:26,571 INFO L119 LiptonReduction]: Number of co-enabled transitions 54516 [2023-08-31 20:49:29,829 INFO L134 LiptonReduction]: Checked pairs total: 147978 [2023-08-31 20:49:29,829 INFO L136 LiptonReduction]: Total number of compositions: 220 [2023-08-31 20:49:29,830 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 20:49:29,831 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;@3a1eb398, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 20:49:29,831 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 20:49:29,859 INFO L130 PetriNetUnfolder]: 92/429 cut-off events. [2023-08-31 20:49:29,860 INFO L131 PetriNetUnfolder]: For 129/129 co-relation queries the response was YES. [2023-08-31 20:49:29,860 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 20:49:29,860 INFO L208 CegarLoopForPetriNet]: trace histogram [8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 20:49:29,860 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 20:49:29,861 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 20:49:29,861 INFO L85 PathProgramCache]: Analyzing trace with hash 1640337184, now seen corresponding path program 1 times [2023-08-31 20:49:29,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 20:49:29,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357243885] [2023-08-31 20:49:29,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 20:49:29,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 20:49:29,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 20:49:29,885 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 20:49:29,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 20:49:29,905 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 20:49:29,906 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 20:49:29,906 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 20:49:29,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-31 20:49:29,906 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 20:49:29,907 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 20:49:29,907 WARN L233 ceAbstractionStarter]: 7 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 20:49:29,907 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 8 thread instances. [2023-08-31 20:49:29,929 INFO L144 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2023-08-31 20:49:29,932 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 303 places, 329 transitions, 778 flow [2023-08-31 20:49:31,077 INFO L130 PetriNetUnfolder]: 1147/6837 cut-off events. [2023-08-31 20:49:31,077 INFO L131 PetriNetUnfolder]: For 1136/1136 co-relation queries the response was YES. [2023-08-31 20:49:31,150 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7922 conditions, 6837 events. 1147/6837 cut-off events. For 1136/1136 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 59354 event pairs, 522 based on Foata normal form. 0/5902 useless extension candidates. Maximal degree in co-relation 4206. Up to 1024 conditions per place. [2023-08-31 20:49:31,151 INFO L82 GeneralOperation]: Start removeDead. Operand has 303 places, 329 transitions, 778 flow [2023-08-31 20:49:31,197 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 303 places, 329 transitions, 778 flow [2023-08-31 20:49:31,197 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 20:49:31,197 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 303 places, 329 transitions, 778 flow [2023-08-31 20:49:31,198 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 303 places, 329 transitions, 778 flow [2023-08-31 20:49:31,198 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 303 places, 329 transitions, 778 flow [2023-08-31 20:49:32,170 INFO L130 PetriNetUnfolder]: 1147/6837 cut-off events. [2023-08-31 20:49:32,170 INFO L131 PetriNetUnfolder]: For 1136/1136 co-relation queries the response was YES. [2023-08-31 20:49:32,234 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7922 conditions, 6837 events. 1147/6837 cut-off events. For 1136/1136 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 59354 event pairs, 522 based on Foata normal form. 0/5902 useless extension candidates. Maximal degree in co-relation 4206. Up to 1024 conditions per place. [2023-08-31 20:49:32,394 INFO L119 LiptonReduction]: Number of co-enabled transitions 66704 [2023-08-31 20:49:35,825 INFO L134 LiptonReduction]: Checked pairs total: 183039 [2023-08-31 20:49:35,826 INFO L136 LiptonReduction]: Total number of compositions: 236 [2023-08-31 20:49:35,827 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 20:49:35,827 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;@3a1eb398, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 20:49:35,827 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 20:49:35,861 INFO L130 PetriNetUnfolder]: 124/561 cut-off events. [2023-08-31 20:49:35,862 INFO L131 PetriNetUnfolder]: For 202/202 co-relation queries the response was YES. [2023-08-31 20:49:35,862 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 20:49:35,862 INFO L208 CegarLoopForPetriNet]: trace histogram [9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 20:49:35,862 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 20:49:35,863 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 20:49:35,863 INFO L85 PathProgramCache]: Analyzing trace with hash -1677860214, now seen corresponding path program 1 times [2023-08-31 20:49:35,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 20:49:35,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149682749] [2023-08-31 20:49:35,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 20:49:35,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 20:49:35,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 20:49:35,944 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 20:49:35,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 20:49:35,985 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 20:49:35,985 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 20:49:35,985 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 20:49:35,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-31 20:49:35,986 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 20:49:35,988 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 20:49:35,990 WARN L233 ceAbstractionStarter]: 8 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 20:49:35,990 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 9 thread instances. [2023-08-31 20:49:36,026 INFO L144 ThreadInstanceAdder]: Constructed 9 joinOtherThreadTransitions. [2023-08-31 20:49:36,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 325 places, 353 transitions, 850 flow [2023-08-31 20:49:38,110 INFO L130 PetriNetUnfolder]: 2441/13086 cut-off events. [2023-08-31 20:49:38,110 INFO L131 PetriNetUnfolder]: For 2460/2460 co-relation queries the response was YES. [2023-08-31 20:49:38,276 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15463 conditions, 13086 events. 2441/13086 cut-off events. For 2460/2460 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 130563 event pairs, 1291 based on Foata normal form. 0/11364 useless extension candidates. Maximal degree in co-relation 7904. Up to 2304 conditions per place. [2023-08-31 20:49:38,276 INFO L82 GeneralOperation]: Start removeDead. Operand has 325 places, 353 transitions, 850 flow [2023-08-31 20:49:38,364 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 325 places, 353 transitions, 850 flow [2023-08-31 20:49:38,365 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 20:49:38,365 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 325 places, 353 transitions, 850 flow [2023-08-31 20:49:38,365 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 325 places, 353 transitions, 850 flow [2023-08-31 20:49:38,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 325 places, 353 transitions, 850 flow [2023-08-31 20:49:40,602 INFO L130 PetriNetUnfolder]: 2441/13086 cut-off events. [2023-08-31 20:49:40,602 INFO L131 PetriNetUnfolder]: For 2460/2460 co-relation queries the response was YES. [2023-08-31 20:49:40,751 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15463 conditions, 13086 events. 2441/13086 cut-off events. For 2460/2460 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 130563 event pairs, 1291 based on Foata normal form. 0/11364 useless extension candidates. Maximal degree in co-relation 7904. Up to 2304 conditions per place. [2023-08-31 20:49:41,112 INFO L119 LiptonReduction]: Number of co-enabled transitions 79992 [2023-08-31 20:49:44,712 INFO L134 LiptonReduction]: Checked pairs total: 221230 [2023-08-31 20:49:44,712 INFO L136 LiptonReduction]: Total number of compositions: 253 [2023-08-31 20:49:44,713 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 20:49:44,714 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;@3a1eb398, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 20:49:44,714 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 20:49:44,760 INFO L130 PetriNetUnfolder]: 171/741 cut-off events. [2023-08-31 20:49:44,760 INFO L131 PetriNetUnfolder]: For 309/309 co-relation queries the response was YES. [2023-08-31 20:49:44,760 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 20:49:44,760 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 20:49:44,760 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 20:49:44,761 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 20:49:44,761 INFO L85 PathProgramCache]: Analyzing trace with hash -1065390909, now seen corresponding path program 1 times [2023-08-31 20:49:44,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 20:49:44,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476477485] [2023-08-31 20:49:44,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 20:49:44,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 20:49:44,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 20:49:44,783 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 20:49:44,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 20:49:44,803 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 20:49:44,804 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 20:49:44,804 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 20:49:44,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-31 20:49:44,804 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 20:49:44,805 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 20:49:44,805 WARN L233 ceAbstractionStarter]: 9 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 20:49:44,805 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 10 thread instances. [2023-08-31 20:49:44,831 INFO L144 ThreadInstanceAdder]: Constructed 10 joinOtherThreadTransitions. [2023-08-31 20:49:44,834 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 347 places, 377 transitions, 924 flow [2023-08-31 20:49:49,496 INFO L130 PetriNetUnfolder]: 5271/25735 cut-off events. [2023-08-31 20:49:49,496 INFO L131 PetriNetUnfolder]: For 5330/5330 co-relation queries the response was YES. [2023-08-31 20:49:49,808 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30941 conditions, 25735 events. 5271/25735 cut-off events. For 5330/5330 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 291424 event pairs, 3084 based on Foata normal form. 0/22458 useless extension candidates. Maximal degree in co-relation 15443. Up to 5120 conditions per place. [2023-08-31 20:49:49,808 INFO L82 GeneralOperation]: Start removeDead. Operand has 347 places, 377 transitions, 924 flow [2023-08-31 20:49:49,938 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 347 places, 377 transitions, 924 flow [2023-08-31 20:49:49,938 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 20:49:49,938 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 347 places, 377 transitions, 924 flow [2023-08-31 20:49:49,939 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 347 places, 377 transitions, 924 flow [2023-08-31 20:49:49,939 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 347 places, 377 transitions, 924 flow [2023-08-31 20:49:54,555 INFO L130 PetriNetUnfolder]: 5271/25735 cut-off events. [2023-08-31 20:49:54,555 INFO L131 PetriNetUnfolder]: For 5330/5330 co-relation queries the response was YES. [2023-08-31 20:49:54,879 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30941 conditions, 25735 events. 5271/25735 cut-off events. For 5330/5330 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 291424 event pairs, 3084 based on Foata normal form. 0/22458 useless extension candidates. Maximal degree in co-relation 15443. Up to 5120 conditions per place. [2023-08-31 20:49:55,768 INFO L119 LiptonReduction]: Number of co-enabled transitions 94380 [2023-08-31 20:49:59,408 INFO L134 LiptonReduction]: Checked pairs total: 256733 [2023-08-31 20:49:59,408 INFO L136 LiptonReduction]: Total number of compositions: 272 [2023-08-31 20:49:59,409 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 20:49:59,410 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@3a1eb398, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 20:49:59,410 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 20:49:59,470 INFO L130 PetriNetUnfolder]: 252/1017 cut-off events. [2023-08-31 20:49:59,470 INFO L131 PetriNetUnfolder]: For 469/469 co-relation queries the response was YES. [2023-08-31 20:49:59,470 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 20:49:59,471 INFO L208 CegarLoopForPetriNet]: trace histogram [11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 20:49:59,471 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 20:49:59,471 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 20:49:59,471 INFO L85 PathProgramCache]: Analyzing trace with hash -1487205021, now seen corresponding path program 1 times [2023-08-31 20:49:59,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 20:49:59,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489737449] [2023-08-31 20:49:59,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 20:49:59,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 20:49:59,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 20:49:59,495 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 20:49:59,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 20:49:59,516 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 20:49:59,516 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 20:49:59,517 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 20:49:59,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-31 20:49:59,517 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 20:49:59,517 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 20:49:59,518 WARN L233 ceAbstractionStarter]: 10 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 20:49:59,518 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 11 thread instances. [2023-08-31 20:49:59,547 INFO L144 ThreadInstanceAdder]: Constructed 11 joinOtherThreadTransitions. [2023-08-31 20:49:59,550 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 369 places, 401 transitions, 1000 flow [2023-08-31 20:50:09,472 INFO L130 PetriNetUnfolder]: 11429/51440 cut-off events. [2023-08-31 20:50:09,472 INFO L131 PetriNetUnfolder]: For 11539/11539 co-relation queries the response was YES. [2023-08-31 20:50:10,449 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62804 conditions, 51440 events. 11429/51440 cut-off events. For 11539/11539 co-relation queries the response was YES. Maximal size of possible extension queue 721. Compared 649856 event pairs, 7181 based on Foata normal form. 0/45072 useless extension candidates. Maximal degree in co-relation 30919. Up to 11264 conditions per place. [2023-08-31 20:50:10,449 INFO L82 GeneralOperation]: Start removeDead. Operand has 369 places, 401 transitions, 1000 flow [2023-08-31 20:50:11,053 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 369 places, 401 transitions, 1000 flow [2023-08-31 20:50:11,053 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 20:50:11,053 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 369 places, 401 transitions, 1000 flow [2023-08-31 20:50:11,054 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 369 places, 401 transitions, 1000 flow [2023-08-31 20:50:11,054 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 369 places, 401 transitions, 1000 flow [2023-08-31 20:50:20,633 INFO L130 PetriNetUnfolder]: 11429/51440 cut-off events. [2023-08-31 20:50:20,634 INFO L131 PetriNetUnfolder]: For 11539/11539 co-relation queries the response was YES. [2023-08-31 20:50:21,583 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62804 conditions, 51440 events. 11429/51440 cut-off events. For 11539/11539 co-relation queries the response was YES. Maximal size of possible extension queue 721. Compared 649856 event pairs, 7181 based on Foata normal form. 0/45072 useless extension candidates. Maximal degree in co-relation 30919. Up to 11264 conditions per place. [2023-08-31 20:50:23,819 INFO L119 LiptonReduction]: Number of co-enabled transitions 109868 [2023-08-31 20:50:27,686 INFO L134 LiptonReduction]: Checked pairs total: 314302 [2023-08-31 20:50:27,687 INFO L136 LiptonReduction]: Total number of compositions: 285 [2023-08-31 20:50:27,688 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 20:50:27,688 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;@3a1eb398, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 20:50:27,688 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 20:50:27,776 INFO L130 PetriNetUnfolder]: 378/1407 cut-off events. [2023-08-31 20:50:27,777 INFO L131 PetriNetUnfolder]: For 713/713 co-relation queries the response was YES. [2023-08-31 20:50:27,777 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 20:50:27,777 INFO L208 CegarLoopForPetriNet]: trace histogram [12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 20:50:27,777 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 20:50:27,778 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 20:50:27,778 INFO L85 PathProgramCache]: Analyzing trace with hash 566737908, now seen corresponding path program 1 times [2023-08-31 20:50:27,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 20:50:27,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177508074] [2023-08-31 20:50:27,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 20:50:27,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 20:50:27,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 20:50:27,800 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 20:50:27,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 20:50:27,820 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 20:50:27,821 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 20:50:27,821 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 20:50:27,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-31 20:50:27,821 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 20:50:27,822 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 20:50:27,822 WARN L233 ceAbstractionStarter]: 11 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 20:50:27,822 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 12 thread instances. [2023-08-31 20:50:27,850 INFO L144 ThreadInstanceAdder]: Constructed 12 joinOtherThreadTransitions. [2023-08-31 20:50:27,853 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 391 places, 425 transitions, 1078 flow [2023-08-31 20:50:49,580 INFO L130 PetriNetUnfolder]: 24755/103769 cut-off events. [2023-08-31 20:50:49,580 INFO L131 PetriNetUnfolder]: For 24928/24928 co-relation queries the response was YES. [2023-08-31 20:50:53,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 128460 conditions, 103769 events. 24755/103769 cut-off events. For 24928/24928 co-relation queries the response was YES. Maximal size of possible extension queue 1436. Compared 1441020 event pairs, 16398 based on Foata normal form. 0/91238 useless extension candidates. Maximal degree in co-relation 62780. Up to 24576 conditions per place. [2023-08-31 20:50:53,423 INFO L82 GeneralOperation]: Start removeDead. Operand has 391 places, 425 transitions, 1078 flow [2023-08-31 20:50:54,585 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 391 places, 425 transitions, 1078 flow [2023-08-31 20:50:54,586 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 20:50:54,586 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 391 places, 425 transitions, 1078 flow [2023-08-31 20:50:54,586 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 391 places, 425 transitions, 1078 flow [2023-08-31 20:50:54,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 391 places, 425 transitions, 1078 flow [2023-08-31 20:51:17,625 INFO L130 PetriNetUnfolder]: 24755/103769 cut-off events. [2023-08-31 20:51:17,625 INFO L131 PetriNetUnfolder]: For 24928/24928 co-relation queries the response was YES. [2023-08-31 20:51:21,278 INFO L83 FinitePrefix]: Finished finitePrefix Result has 128460 conditions, 103769 events. 24755/103769 cut-off events. For 24928/24928 co-relation queries the response was YES. Maximal size of possible extension queue 1436. Compared 1441020 event pairs, 16398 based on Foata normal form. 0/91238 useless extension candidates. Maximal degree in co-relation 62780. Up to 24576 conditions per place. [2023-08-31 20:51:27,226 INFO L119 LiptonReduction]: Number of co-enabled transitions 126456 [2023-08-31 20:51:31,026 INFO L134 LiptonReduction]: Checked pairs total: 358000 [2023-08-31 20:51:31,026 INFO L136 LiptonReduction]: Total number of compositions: 300 [2023-08-31 20:51:31,028 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 20:51:31,028 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;@3a1eb398, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 20:51:31,028 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 20:51:31,177 INFO L130 PetriNetUnfolder]: 589/2010 cut-off events. [2023-08-31 20:51:31,178 INFO L131 PetriNetUnfolder]: For 1089/1089 co-relation queries the response was YES. [2023-08-31 20:51:31,178 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 20:51:31,178 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 20:51:31,178 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 20:51:31,178 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 20:51:31,178 INFO L85 PathProgramCache]: Analyzing trace with hash -906681291, now seen corresponding path program 1 times [2023-08-31 20:51:31,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 20:51:31,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693767302] [2023-08-31 20:51:31,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 20:51:31,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 20:51:31,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 20:51:31,198 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 20:51:31,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 20:51:31,218 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 20:51:31,218 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 20:51:31,219 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 20:51:31,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-31 20:51:31,219 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 20:51:31,222 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 20:51:31,222 WARN L233 ceAbstractionStarter]: 12 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 20:51:31,222 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 13 thread instances. [2023-08-31 20:51:31,252 INFO L144 ThreadInstanceAdder]: Constructed 13 joinOtherThreadTransitions. [2023-08-31 20:51:31,256 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 413 places, 449 transitions, 1158 flow [2023-08-31 20:52:18,552 INFO L130 PetriNetUnfolder]: 53441/210370 cut-off events. [2023-08-31 20:52:18,552 INFO L131 PetriNetUnfolder]: For 53690/53690 co-relation queries the response was YES. [2023-08-31 20:52:29,609 INFO L83 FinitePrefix]: Finished finitePrefix Result has 263749 conditions, 210370 events. 53441/210370 cut-off events. For 53690/53690 co-relation queries the response was YES. Maximal size of possible extension queue 2523. Compared 3168587 event pairs, 36879 based on Foata normal form. 0/185532 useless extension candidates. Maximal degree in co-relation 128434. Up to 53248 conditions per place. [2023-08-31 20:52:29,609 INFO L82 GeneralOperation]: Start removeDead. Operand has 413 places, 449 transitions, 1158 flow [2023-08-31 20:52:32,855 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 413 places, 449 transitions, 1158 flow [2023-08-31 20:52:32,855 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 20:52:32,855 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 413 places, 449 transitions, 1158 flow [2023-08-31 20:52:32,856 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 413 places, 449 transitions, 1158 flow [2023-08-31 20:52:32,856 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 413 places, 449 transitions, 1158 flow [2023-08-31 20:53:24,030 INFO L130 PetriNetUnfolder]: 53441/210370 cut-off events. [2023-08-31 20:53:24,031 INFO L131 PetriNetUnfolder]: For 53690/53690 co-relation queries the response was YES. [2023-08-31 20:53:33,201 INFO L83 FinitePrefix]: Finished finitePrefix Result has 263749 conditions, 210370 events. 53441/210370 cut-off events. For 53690/53690 co-relation queries the response was YES. Maximal size of possible extension queue 2523. Compared 3168587 event pairs, 36879 based on Foata normal form. 0/185532 useless extension candidates. Maximal degree in co-relation 128434. Up to 53248 conditions per place. [2023-08-31 20:53:49,950 INFO L119 LiptonReduction]: Number of co-enabled transitions 144144 [2023-08-31 20:53:54,054 INFO L134 LiptonReduction]: Checked pairs total: 471411 [2023-08-31 20:53:54,054 INFO L136 LiptonReduction]: Total number of compositions: 317 [2023-08-31 20:53:54,055 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 20:53:54,056 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;@3a1eb398, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 20:53:54,056 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 20:53:54,284 INFO L130 PetriNetUnfolder]: 953/2972 cut-off events. [2023-08-31 20:53:54,285 INFO L131 PetriNetUnfolder]: For 1672/1672 co-relation queries the response was YES. [2023-08-31 20:53:54,285 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 20:53:54,285 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 20:53:54,285 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 20:53:54,285 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 20:53:54,285 INFO L85 PathProgramCache]: Analyzing trace with hash -262660420, now seen corresponding path program 1 times [2023-08-31 20:53:54,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 20:53:54,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406495456] [2023-08-31 20:53:54,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 20:53:54,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 20:53:54,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 20:53:54,309 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 20:53:54,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 20:53:54,332 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 20:53:54,333 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 20:53:54,333 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 20:53:54,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-31 20:53:54,333 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 20:53:54,334 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 20:53:54,334 WARN L233 ceAbstractionStarter]: 13 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 20:53:54,334 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 14 thread instances. [2023-08-31 20:53:54,366 INFO L144 ThreadInstanceAdder]: Constructed 14 joinOtherThreadTransitions. [2023-08-31 20:53:54,369 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 435 places, 473 transitions, 1240 flow