./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/no-data-race.prp --file ../../../trunk/examples/svcomp/pthread-ext/26_stack_cas_longest-1.i --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --architecture 32bit -------------------------------------------------------------------------------- Checking for data races Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/pthread-ext/26_stack_cas_longest-1.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 8c0827ac193c1e2b03d5ccf1e60b62c7d6ff1b4feade2c409a6c7ca2cebf9412 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-31 11:40:42,349 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-31 11:40:42,351 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-31 11:40:42,378 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-31 11:40:42,379 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-31 11:40:42,380 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-31 11:40:42,381 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-31 11:40:42,383 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-31 11:40:42,385 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-31 11:40:42,385 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-31 11:40:42,386 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-31 11:40:42,387 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-31 11:40:42,388 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-31 11:40:42,389 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-31 11:40:42,390 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-31 11:40:42,391 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-31 11:40:42,392 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-31 11:40:42,393 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-31 11:40:42,394 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-31 11:40:42,396 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-31 11:40:42,404 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-31 11:40:42,407 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-31 11:40:42,412 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-31 11:40:42,414 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-31 11:40:42,421 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-31 11:40:42,425 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-31 11:40:42,425 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-31 11:40:42,426 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-31 11:40:42,427 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-31 11:40:42,427 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-31 11:40:42,428 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-31 11:40:42,428 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-31 11:40:42,429 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-31 11:40:42,431 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-31 11:40:42,432 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-31 11:40:42,432 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-31 11:40:42,433 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-31 11:40:42,434 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-31 11:40:42,434 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-31 11:40:42,436 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-31 11:40:42,437 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-31 11:40:42,438 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DataRace-32bit-Automizer_Default.epf [2023-08-31 11:40:42,466 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-31 11:40:42,466 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-31 11:40:42,467 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-31 11:40:42,468 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-31 11:40:42,468 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-31 11:40:42,469 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-31 11:40:42,469 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-31 11:40:42,469 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-31 11:40:42,469 INFO L138 SettingsManager]: * Use SBE=true [2023-08-31 11:40:42,470 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-31 11:40:42,470 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-31 11:40:42,471 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-31 11:40:42,471 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-31 11:40:42,471 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-31 11:40:42,471 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-31 11:40:42,471 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-31 11:40:42,472 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-31 11:40:42,472 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-31 11:40:42,472 INFO L138 SettingsManager]: * Check absence of data races in concurrent programs=true [2023-08-31 11:40:42,472 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-31 11:40:42,472 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-31 11:40:42,473 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-31 11:40:42,473 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-31 11:40:42,473 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-31 11:40:42,473 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-31 11:40:42,473 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-31 11:40:42,474 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 11:40:42,474 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-31 11:40:42,474 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-31 11:40:42,474 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-31 11:40:42,474 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-31 11:40:42,475 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-31 11:40:42,475 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-31 11:40:42,475 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-31 11:40:42,475 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-31 11:40:42,475 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-31 11:40:42,476 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-31 11:40:42,476 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! data-race) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8c0827ac193c1e2b03d5ccf1e60b62c7d6ff1b4feade2c409a6c7ca2cebf9412 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-08-31 11:40:42,748 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-31 11:40:42,765 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-31 11:40:42,767 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-31 11:40:42,768 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-31 11:40:42,769 INFO L275 PluginConnector]: CDTParser initialized [2023-08-31 11:40:42,770 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/26_stack_cas_longest-1.i [2023-08-31 11:40:43,981 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-31 11:40:44,265 INFO L351 CDTParser]: Found 1 translation units. [2023-08-31 11:40:44,265 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/26_stack_cas_longest-1.i [2023-08-31 11:40:44,277 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4a14adcf2/010ca0fd4f8b4ba1b74332f70c2586eb/FLAG9c472f1a8 [2023-08-31 11:40:44,546 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4a14adcf2/010ca0fd4f8b4ba1b74332f70c2586eb [2023-08-31 11:40:44,548 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-31 11:40:44,549 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-31 11:40:44,550 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-31 11:40:44,551 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-31 11:40:44,558 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-31 11:40:44,559 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 11:40:44" (1/1) ... [2023-08-31 11:40:44,560 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1345f9de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 11:40:44, skipping insertion in model container [2023-08-31 11:40:44,560 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 11:40:44" (1/1) ... [2023-08-31 11:40:44,565 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-31 11:40:44,608 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-31 11:40:44,882 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/26_stack_cas_longest-1.i[31167,31180] [2023-08-31 11:40:44,894 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 11:40:44,906 INFO L203 MainTranslator]: Completed pre-run [2023-08-31 11:40:44,978 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/26_stack_cas_longest-1.i[31167,31180] [2023-08-31 11:40:44,990 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 11:40:45,067 INFO L208 MainTranslator]: Completed translation [2023-08-31 11:40:45,080 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 11:40:45 WrapperNode [2023-08-31 11:40:45,080 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-31 11:40:45,090 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-31 11:40:45,090 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-31 11:40:45,090 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-31 11:40:45,096 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 11:40:45" (1/1) ... [2023-08-31 11:40:45,128 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 11:40:45" (1/1) ... [2023-08-31 11:40:45,185 INFO L138 Inliner]: procedures = 177, calls = 47, calls flagged for inlining = 16, calls inlined = 19, statements flattened = 320 [2023-08-31 11:40:45,186 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-31 11:40:45,187 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-31 11:40:45,187 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-31 11:40:45,188 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-31 11:40:45,195 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 11:40:45" (1/1) ... [2023-08-31 11:40:45,196 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 11:40:45" (1/1) ... [2023-08-31 11:40:45,207 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 11:40:45" (1/1) ... [2023-08-31 11:40:45,217 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 11:40:45" (1/1) ... [2023-08-31 11:40:45,232 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 11:40:45" (1/1) ... [2023-08-31 11:40:45,250 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 11:40:45" (1/1) ... [2023-08-31 11:40:45,255 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 11:40:45" (1/1) ... [2023-08-31 11:40:45,263 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 11:40:45" (1/1) ... [2023-08-31 11:40:45,266 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-31 11:40:45,269 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-31 11:40:45,269 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-31 11:40:45,269 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-31 11:40:45,270 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 11:40:45" (1/1) ... [2023-08-31 11:40:45,275 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 11:40:45,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 11:40:45,306 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-31 11:40:45,316 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-31 11:40:45,336 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-31 11:40:45,337 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-08-31 11:40:45,337 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-08-31 11:40:45,337 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-31 11:40:45,337 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-31 11:40:45,337 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-31 11:40:45,338 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-31 11:40:45,338 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-31 11:40:45,338 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-31 11:40:45,338 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-31 11:40:45,339 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-31 11:40:45,529 INFO L236 CfgBuilder]: Building ICFG [2023-08-31 11:40:45,531 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-31 11:40:46,132 INFO L277 CfgBuilder]: Performing block encoding [2023-08-31 11:40:46,417 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-31 11:40:46,417 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-31 11:40:46,419 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 11:40:46 BoogieIcfgContainer [2023-08-31 11:40:46,419 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-31 11:40:46,431 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-31 11:40:46,431 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-31 11:40:46,434 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-31 11:40:46,434 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.08 11:40:44" (1/3) ... [2023-08-31 11:40:46,435 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44dee8d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 11:40:46, skipping insertion in model container [2023-08-31 11:40:46,435 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 11:40:45" (2/3) ... [2023-08-31 11:40:46,436 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44dee8d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 11:40:46, skipping insertion in model container [2023-08-31 11:40:46,436 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 11:40:46" (3/3) ... [2023-08-31 11:40:46,437 INFO L112 eAbstractionObserver]: Analyzing ICFG 26_stack_cas_longest-1.i [2023-08-31 11:40:46,444 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-31 11:40:46,452 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-31 11:40:46,453 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 26 error locations. [2023-08-31 11:40:46,453 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-31 11:40:46,555 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 11:40:46,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 174 places, 181 transitions, 367 flow [2023-08-31 11:40:46,683 INFO L130 PetriNetUnfolder]: 11/191 cut-off events. [2023-08-31 11:40:46,684 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-31 11:40:46,699 INFO L83 FinitePrefix]: Finished finitePrefix Result has 196 conditions, 191 events. 11/191 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 243 event pairs, 0 based on Foata normal form. 0/152 useless extension candidates. Maximal degree in co-relation 157. Up to 4 conditions per place. [2023-08-31 11:40:46,700 INFO L82 GeneralOperation]: Start removeDead. Operand has 174 places, 181 transitions, 367 flow [2023-08-31 11:40:46,707 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 174 places, 181 transitions, 367 flow [2023-08-31 11:40:46,711 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 11:40:46,730 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 174 places, 181 transitions, 367 flow [2023-08-31 11:40:46,734 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 174 places, 181 transitions, 367 flow [2023-08-31 11:40:46,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 174 places, 181 transitions, 367 flow [2023-08-31 11:40:46,786 INFO L130 PetriNetUnfolder]: 11/191 cut-off events. [2023-08-31 11:40:46,786 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-31 11:40:46,791 INFO L83 FinitePrefix]: Finished finitePrefix Result has 196 conditions, 191 events. 11/191 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 243 event pairs, 0 based on Foata normal form. 0/152 useless extension candidates. Maximal degree in co-relation 157. Up to 4 conditions per place. [2023-08-31 11:40:46,793 INFO L119 LiptonReduction]: Number of co-enabled transitions 3770 [2023-08-31 11:40:53,000 INFO L134 LiptonReduction]: Checked pairs total: 4399 [2023-08-31 11:40:53,001 INFO L136 LiptonReduction]: Total number of compositions: 195 [2023-08-31 11:40:53,013 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 11:40:53,018 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;@709f2cc9, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 11:40:53,019 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 11:40:53,023 INFO L130 PetriNetUnfolder]: 2/20 cut-off events. [2023-08-31 11:40:53,023 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-31 11:40:53,024 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 11:40:53,024 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-31 11:40:53,025 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 11:40:53,029 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 11:40:53,029 INFO L85 PathProgramCache]: Analyzing trace with hash 1874194445, now seen corresponding path program 1 times [2023-08-31 11:40:53,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 11:40:53,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106739848] [2023-08-31 11:40:53,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 11:40:53,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 11:40:53,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:40:53,139 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 11:40:53,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:40:53,197 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 11:40:53,198 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 11:40:53,199 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 11:40:53,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-31 11:40:53,201 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 11:40:53,206 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 11:40:53,207 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 11:40:53,207 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-31 11:40:53,311 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 11:40:53,343 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 313 places, 327 transitions, 666 flow [2023-08-31 11:40:53,415 INFO L130 PetriNetUnfolder]: 21/349 cut-off events. [2023-08-31 11:40:53,415 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-31 11:40:53,420 INFO L83 FinitePrefix]: Finished finitePrefix Result has 359 conditions, 349 events. 21/349 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 949 event pairs, 0 based on Foata normal form. 0/273 useless extension candidates. Maximal degree in co-relation 302. Up to 6 conditions per place. [2023-08-31 11:40:53,421 INFO L82 GeneralOperation]: Start removeDead. Operand has 313 places, 327 transitions, 666 flow [2023-08-31 11:40:53,424 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 313 places, 327 transitions, 666 flow [2023-08-31 11:40:53,424 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 11:40:53,424 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 313 places, 327 transitions, 666 flow [2023-08-31 11:40:53,424 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 313 places, 327 transitions, 666 flow [2023-08-31 11:40:53,424 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 313 places, 327 transitions, 666 flow [2023-08-31 11:40:53,494 INFO L130 PetriNetUnfolder]: 21/349 cut-off events. [2023-08-31 11:40:53,495 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-31 11:40:53,499 INFO L83 FinitePrefix]: Finished finitePrefix Result has 359 conditions, 349 events. 21/349 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 949 event pairs, 0 based on Foata normal form. 0/273 useless extension candidates. Maximal degree in co-relation 302. Up to 6 conditions per place. [2023-08-31 11:40:53,519 INFO L119 LiptonReduction]: Number of co-enabled transitions 49880 [2023-08-31 11:40:59,414 INFO L134 LiptonReduction]: Checked pairs total: 221986 [2023-08-31 11:40:59,415 INFO L136 LiptonReduction]: Total number of compositions: 189 [2023-08-31 11:40:59,417 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 11:40:59,418 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;@709f2cc9, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 11:40:59,419 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 11:40:59,423 INFO L130 PetriNetUnfolder]: 1/37 cut-off events. [2023-08-31 11:40:59,424 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-31 11:40:59,424 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 11:40:59,424 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-31 11:40:59,424 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 11:40:59,424 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 11:40:59,425 INFO L85 PathProgramCache]: Analyzing trace with hash 1770387562, now seen corresponding path program 1 times [2023-08-31 11:40:59,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 11:40:59,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102946794] [2023-08-31 11:40:59,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 11:40:59,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 11:40:59,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:40:59,451 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 11:40:59,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:40:59,469 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 11:40:59,470 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 11:40:59,470 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 11:40:59,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-31 11:40:59,470 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 11:40:59,471 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 11:40:59,471 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 11:40:59,471 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-31 11:40:59,559 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 11:40:59,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 452 places, 473 transitions, 967 flow [2023-08-31 11:40:59,696 INFO L130 PetriNetUnfolder]: 31/507 cut-off events. [2023-08-31 11:40:59,697 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-31 11:40:59,708 INFO L83 FinitePrefix]: Finished finitePrefix Result has 523 conditions, 507 events. 31/507 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1855 event pairs, 0 based on Foata normal form. 0/394 useless extension candidates. Maximal degree in co-relation 447. Up to 8 conditions per place. [2023-08-31 11:40:59,708 INFO L82 GeneralOperation]: Start removeDead. Operand has 452 places, 473 transitions, 967 flow [2023-08-31 11:40:59,717 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 452 places, 473 transitions, 967 flow [2023-08-31 11:40:59,718 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 11:40:59,718 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 452 places, 473 transitions, 967 flow [2023-08-31 11:40:59,718 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 452 places, 473 transitions, 967 flow [2023-08-31 11:40:59,718 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 452 places, 473 transitions, 967 flow [2023-08-31 11:40:59,833 INFO L130 PetriNetUnfolder]: 31/507 cut-off events. [2023-08-31 11:40:59,833 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-31 11:40:59,844 INFO L83 FinitePrefix]: Finished finitePrefix Result has 523 conditions, 507 events. 31/507 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1855 event pairs, 0 based on Foata normal form. 0/394 useless extension candidates. Maximal degree in co-relation 447. Up to 8 conditions per place. [2023-08-31 11:40:59,877 INFO L119 LiptonReduction]: Number of co-enabled transitions 138330 [2023-08-31 11:41:23,919 INFO L134 LiptonReduction]: Checked pairs total: 552886 [2023-08-31 11:41:23,919 INFO L136 LiptonReduction]: Total number of compositions: 281 [2023-08-31 11:41:23,921 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 11:41:23,922 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;@709f2cc9, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 11:41:23,922 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 11:41:23,930 INFO L130 PetriNetUnfolder]: 2/72 cut-off events. [2023-08-31 11:41:23,930 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-31 11:41:23,930 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 11:41:23,930 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-08-31 11:41:23,930 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 11:41:23,931 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 11:41:23,931 INFO L85 PathProgramCache]: Analyzing trace with hash 1778784938, now seen corresponding path program 1 times [2023-08-31 11:41:23,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 11:41:23,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671152622] [2023-08-31 11:41:23,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 11:41:23,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 11:41:23,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:41:23,953 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 11:41:23,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:41:23,974 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 11:41:23,975 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 11:41:23,975 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 11:41:23,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-31 11:41:23,975 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 11:41:23,976 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 11:41:23,976 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 11:41:23,976 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-08-31 11:41:24,079 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 11:41:24,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 591 places, 619 transitions, 1270 flow [2023-08-31 11:41:24,305 INFO L130 PetriNetUnfolder]: 41/665 cut-off events. [2023-08-31 11:41:24,305 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-08-31 11:41:24,321 INFO L83 FinitePrefix]: Finished finitePrefix Result has 688 conditions, 665 events. 41/665 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 2872 event pairs, 0 based on Foata normal form. 0/515 useless extension candidates. Maximal degree in co-relation 592. Up to 10 conditions per place. [2023-08-31 11:41:24,321 INFO L82 GeneralOperation]: Start removeDead. Operand has 591 places, 619 transitions, 1270 flow [2023-08-31 11:41:24,327 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 591 places, 619 transitions, 1270 flow [2023-08-31 11:41:24,327 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 11:41:24,327 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 591 places, 619 transitions, 1270 flow [2023-08-31 11:41:24,328 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 591 places, 619 transitions, 1270 flow [2023-08-31 11:41:24,328 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 591 places, 619 transitions, 1270 flow [2023-08-31 11:41:24,531 INFO L130 PetriNetUnfolder]: 41/665 cut-off events. [2023-08-31 11:41:24,531 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-08-31 11:41:24,547 INFO L83 FinitePrefix]: Finished finitePrefix Result has 688 conditions, 665 events. 41/665 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 2872 event pairs, 0 based on Foata normal form. 0/515 useless extension candidates. Maximal degree in co-relation 592. Up to 10 conditions per place. [2023-08-31 11:41:24,642 INFO L119 LiptonReduction]: Number of co-enabled transitions 269120 [2023-08-31 11:42:08,580 INFO L134 LiptonReduction]: Checked pairs total: 1260756 [2023-08-31 11:42:08,581 INFO L136 LiptonReduction]: Total number of compositions: 377 [2023-08-31 11:42:08,582 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 11:42:08,583 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;@709f2cc9, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 11:42:08,583 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 11:42:08,605 INFO L130 PetriNetUnfolder]: 5/125 cut-off events. [2023-08-31 11:42:08,605 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-08-31 11:42:08,605 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 11:42:08,605 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2023-08-31 11:42:08,606 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 11:42:08,606 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 11:42:08,606 INFO L85 PathProgramCache]: Analyzing trace with hash -419963176, now seen corresponding path program 1 times [2023-08-31 11:42:08,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 11:42:08,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685831325] [2023-08-31 11:42:08,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 11:42:08,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 11:42:08,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:42:08,649 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 11:42:08,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:42:08,687 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 11:42:08,691 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 11:42:08,692 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 11:42:08,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-31 11:42:08,692 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 11:42:08,693 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 11:42:08,693 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 11:42:08,693 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-08-31 11:42:08,835 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 11:42:08,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 730 places, 765 transitions, 1575 flow [2023-08-31 11:42:09,122 INFO L130 PetriNetUnfolder]: 51/823 cut-off events. [2023-08-31 11:42:09,122 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-08-31 11:42:09,139 INFO L83 FinitePrefix]: Finished finitePrefix Result has 854 conditions, 823 events. 51/823 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 3941 event pairs, 0 based on Foata normal form. 0/636 useless extension candidates. Maximal degree in co-relation 737. Up to 12 conditions per place. [2023-08-31 11:42:09,140 INFO L82 GeneralOperation]: Start removeDead. Operand has 730 places, 765 transitions, 1575 flow [2023-08-31 11:42:09,146 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 730 places, 765 transitions, 1575 flow [2023-08-31 11:42:09,146 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 11:42:09,147 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 730 places, 765 transitions, 1575 flow [2023-08-31 11:42:09,147 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 730 places, 765 transitions, 1575 flow [2023-08-31 11:42:09,147 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 730 places, 765 transitions, 1575 flow [2023-08-31 11:42:09,434 INFO L130 PetriNetUnfolder]: 51/823 cut-off events. [2023-08-31 11:42:09,446 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-08-31 11:42:09,474 INFO L83 FinitePrefix]: Finished finitePrefix Result has 854 conditions, 823 events. 51/823 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 3941 event pairs, 0 based on Foata normal form. 0/636 useless extension candidates. Maximal degree in co-relation 737. Up to 12 conditions per place. [2023-08-31 11:42:09,595 INFO L119 LiptonReduction]: Number of co-enabled transitions 442250 [2023-08-31 11:42:31,300 INFO L134 LiptonReduction]: Checked pairs total: 1843009 [2023-08-31 11:42:31,301 INFO L136 LiptonReduction]: Total number of compositions: 440 [2023-08-31 11:42:31,303 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 11:42:31,303 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;@709f2cc9, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 11:42:31,303 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 11:42:31,325 INFO L130 PetriNetUnfolder]: 9/189 cut-off events. [2023-08-31 11:42:31,325 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-08-31 11:42:31,326 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 11:42:31,326 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 11:42:31,328 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 11:42:31,328 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 11:42:31,328 INFO L85 PathProgramCache]: Analyzing trace with hash 2014686694, now seen corresponding path program 1 times [2023-08-31 11:42:31,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 11:42:31,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4209841] [2023-08-31 11:42:31,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 11:42:31,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 11:42:31,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:42:31,355 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 11:42:31,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:42:31,385 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 11:42:31,397 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 11:42:31,397 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 11:42:31,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-31 11:42:31,398 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 11:42:31,398 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 11:42:31,400 WARN L233 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 11:42:31,401 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2023-08-31 11:42:31,574 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 11:42:31,583 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 869 places, 911 transitions, 1882 flow [2023-08-31 11:42:31,989 INFO L130 PetriNetUnfolder]: 61/981 cut-off events. [2023-08-31 11:42:31,990 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2023-08-31 11:42:32,022 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1021 conditions, 981 events. 61/981 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 5055 event pairs, 0 based on Foata normal form. 0/757 useless extension candidates. Maximal degree in co-relation 882. Up to 14 conditions per place. [2023-08-31 11:42:32,022 INFO L82 GeneralOperation]: Start removeDead. Operand has 869 places, 911 transitions, 1882 flow [2023-08-31 11:42:32,032 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 869 places, 911 transitions, 1882 flow [2023-08-31 11:42:32,033 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 11:42:32,033 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 869 places, 911 transitions, 1882 flow [2023-08-31 11:42:32,033 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 869 places, 911 transitions, 1882 flow [2023-08-31 11:42:32,033 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 869 places, 911 transitions, 1882 flow [2023-08-31 11:42:32,424 INFO L130 PetriNetUnfolder]: 61/981 cut-off events. [2023-08-31 11:42:32,424 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2023-08-31 11:42:32,449 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1021 conditions, 981 events. 61/981 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 5055 event pairs, 0 based on Foata normal form. 0/757 useless extension candidates. Maximal degree in co-relation 882. Up to 14 conditions per place. [2023-08-31 11:42:32,539 INFO L119 LiptonReduction]: Number of co-enabled transitions 657720 [2023-08-31 11:43:22,423 INFO L134 LiptonReduction]: Checked pairs total: 3121338 [2023-08-31 11:43:22,424 INFO L136 LiptonReduction]: Total number of compositions: 531 [2023-08-31 11:43:22,426 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 11:43:22,426 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;@709f2cc9, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 11:43:22,426 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 11:43:22,462 INFO L130 PetriNetUnfolder]: 14/263 cut-off events. [2023-08-31 11:43:22,462 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2023-08-31 11:43:22,462 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 11:43:22,463 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 11:43:22,463 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 11:43:22,463 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 11:43:22,463 INFO L85 PathProgramCache]: Analyzing trace with hash 295134810, now seen corresponding path program 1 times [2023-08-31 11:43:22,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 11:43:22,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758396464] [2023-08-31 11:43:22,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 11:43:22,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 11:43:22,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:43:22,486 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 11:43:22,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:43:22,509 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 11:43:22,509 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 11:43:22,509 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 11:43:22,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-31 11:43:22,510 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 11:43:22,510 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 11:43:22,510 WARN L233 ceAbstractionStarter]: 6 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 11:43:22,510 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 7 thread instances. [2023-08-31 11:43:22,690 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 11:43:22,698 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1008 places, 1057 transitions, 2191 flow [2023-08-31 11:43:23,243 INFO L130 PetriNetUnfolder]: 71/1139 cut-off events. [2023-08-31 11:43:23,244 INFO L131 PetriNetUnfolder]: For 77/77 co-relation queries the response was YES. [2023-08-31 11:43:23,296 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1189 conditions, 1139 events. 71/1139 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 6212 event pairs, 0 based on Foata normal form. 0/878 useless extension candidates. Maximal degree in co-relation 1027. Up to 16 conditions per place. [2023-08-31 11:43:23,297 INFO L82 GeneralOperation]: Start removeDead. Operand has 1008 places, 1057 transitions, 2191 flow [2023-08-31 11:43:23,309 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1008 places, 1057 transitions, 2191 flow [2023-08-31 11:43:23,309 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 11:43:23,310 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1008 places, 1057 transitions, 2191 flow [2023-08-31 11:43:23,310 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1008 places, 1057 transitions, 2191 flow [2023-08-31 11:43:23,310 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1008 places, 1057 transitions, 2191 flow [2023-08-31 11:43:23,928 INFO L130 PetriNetUnfolder]: 71/1139 cut-off events. [2023-08-31 11:43:23,928 INFO L131 PetriNetUnfolder]: For 77/77 co-relation queries the response was YES. [2023-08-31 11:43:23,973 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1189 conditions, 1139 events. 71/1139 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 6212 event pairs, 0 based on Foata normal form. 0/878 useless extension candidates. Maximal degree in co-relation 1027. Up to 16 conditions per place. [2023-08-31 11:43:24,133 INFO L119 LiptonReduction]: Number of co-enabled transitions 915530 [2023-08-31 11:44:07,831 INFO L134 LiptonReduction]: Checked pairs total: 4345011 [2023-08-31 11:44:07,831 INFO L136 LiptonReduction]: Total number of compositions: 614 [2023-08-31 11:44:07,833 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 11:44:07,833 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;@709f2cc9, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 11:44:07,833 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 11:44:07,887 INFO L130 PetriNetUnfolder]: 19/344 cut-off events. [2023-08-31 11:44:07,888 INFO L131 PetriNetUnfolder]: For 77/77 co-relation queries the response was YES. [2023-08-31 11:44:07,888 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 11:44:07,888 INFO L208 CegarLoopForPetriNet]: trace histogram [8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 11:44:07,888 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 11:44:07,889 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 11:44:07,889 INFO L85 PathProgramCache]: Analyzing trace with hash 238612654, now seen corresponding path program 1 times [2023-08-31 11:44:07,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 11:44:07,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780390603] [2023-08-31 11:44:07,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 11:44:07,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 11:44:07,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:44:07,933 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 11:44:07,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:44:07,967 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 11:44:07,971 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 11:44:07,971 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 11:44:07,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-31 11:44:07,971 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 11:44:07,972 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 11:44:07,972 WARN L233 ceAbstractionStarter]: 7 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 11:44:07,972 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 8 thread instances. [2023-08-31 11:44:08,218 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 11:44:08,226 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1147 places, 1203 transitions, 2502 flow [2023-08-31 11:44:08,773 INFO L130 PetriNetUnfolder]: 81/1297 cut-off events. [2023-08-31 11:44:08,773 INFO L131 PetriNetUnfolder]: For 112/112 co-relation queries the response was YES. [2023-08-31 11:44:08,836 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1358 conditions, 1297 events. 81/1297 cut-off events. For 112/112 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 7333 event pairs, 0 based on Foata normal form. 0/999 useless extension candidates. Maximal degree in co-relation 1173. Up to 18 conditions per place. [2023-08-31 11:44:08,836 INFO L82 GeneralOperation]: Start removeDead. Operand has 1147 places, 1203 transitions, 2502 flow [2023-08-31 11:44:08,846 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1147 places, 1203 transitions, 2502 flow [2023-08-31 11:44:08,846 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 11:44:08,847 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1147 places, 1203 transitions, 2502 flow [2023-08-31 11:44:08,847 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1147 places, 1203 transitions, 2502 flow [2023-08-31 11:44:08,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1147 places, 1203 transitions, 2502 flow [2023-08-31 11:44:09,448 INFO L130 PetriNetUnfolder]: 81/1297 cut-off events. [2023-08-31 11:44:09,449 INFO L131 PetriNetUnfolder]: For 112/112 co-relation queries the response was YES. [2023-08-31 11:44:09,492 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1358 conditions, 1297 events. 81/1297 cut-off events. For 112/112 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 7333 event pairs, 0 based on Foata normal form. 0/999 useless extension candidates. Maximal degree in co-relation 1173. Up to 18 conditions per place. [2023-08-31 11:44:09,638 INFO L119 LiptonReduction]: Number of co-enabled transitions 1215680 [2023-08-31 11:44:53,005 INFO L134 LiptonReduction]: Checked pairs total: 5841015 [2023-08-31 11:44:53,006 INFO L136 LiptonReduction]: Total number of compositions: 688 [2023-08-31 11:44:53,008 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 11:44:53,009 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;@709f2cc9, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 11:44:53,009 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 11:44:53,090 INFO L130 PetriNetUnfolder]: 25/432 cut-off events. [2023-08-31 11:44:53,091 INFO L131 PetriNetUnfolder]: For 112/112 co-relation queries the response was YES. [2023-08-31 11:44:53,091 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 11:44:53,091 INFO L208 CegarLoopForPetriNet]: trace histogram [9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 11:44:53,091 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 11:44:53,092 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 11:44:53,092 INFO L85 PathProgramCache]: Analyzing trace with hash -1912297585, now seen corresponding path program 1 times [2023-08-31 11:44:53,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 11:44:53,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110176625] [2023-08-31 11:44:53,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 11:44:53,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 11:44:53,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:44:53,132 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 11:44:53,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:44:53,172 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 11:44:53,172 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 11:44:53,172 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 11:44:53,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-31 11:44:53,173 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 11:44:53,173 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 11:44:53,173 WARN L233 ceAbstractionStarter]: 8 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 11:44:53,173 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 9 thread instances. [2023-08-31 11:44:53,374 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 11:44:53,382 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1286 places, 1349 transitions, 2815 flow [2023-08-31 11:44:54,066 INFO L130 PetriNetUnfolder]: 91/1455 cut-off events. [2023-08-31 11:44:54,067 INFO L131 PetriNetUnfolder]: For 156/156 co-relation queries the response was YES. [2023-08-31 11:44:54,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1528 conditions, 1455 events. 91/1455 cut-off events. For 156/156 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 8506 event pairs, 0 based on Foata normal form. 0/1120 useless extension candidates. Maximal degree in co-relation 1340. Up to 20 conditions per place. [2023-08-31 11:44:54,169 INFO L82 GeneralOperation]: Start removeDead. Operand has 1286 places, 1349 transitions, 2815 flow [2023-08-31 11:44:54,186 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1286 places, 1349 transitions, 2815 flow [2023-08-31 11:44:54,186 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 11:44:54,186 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1286 places, 1349 transitions, 2815 flow [2023-08-31 11:44:54,186 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1286 places, 1349 transitions, 2815 flow [2023-08-31 11:44:54,186 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1286 places, 1349 transitions, 2815 flow [2023-08-31 11:44:54,774 INFO L130 PetriNetUnfolder]: 91/1455 cut-off events. [2023-08-31 11:44:54,775 INFO L131 PetriNetUnfolder]: For 156/156 co-relation queries the response was YES. [2023-08-31 11:44:54,857 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1528 conditions, 1455 events. 91/1455 cut-off events. For 156/156 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 8506 event pairs, 0 based on Foata normal form. 0/1120 useless extension candidates. Maximal degree in co-relation 1340. Up to 20 conditions per place. [2023-08-31 11:44:55,104 INFO L119 LiptonReduction]: Number of co-enabled transitions 1558170 [2023-08-31 11:45:59,880 INFO L134 LiptonReduction]: Checked pairs total: 7431023 [2023-08-31 11:45:59,880 INFO L136 LiptonReduction]: Total number of compositions: 778 [2023-08-31 11:45:59,883 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 11:45:59,883 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;@709f2cc9, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 11:45:59,883 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 11:45:59,968 INFO L130 PetriNetUnfolder]: 32/523 cut-off events. [2023-08-31 11:45:59,968 INFO L131 PetriNetUnfolder]: For 156/156 co-relation queries the response was YES. [2023-08-31 11:45:59,968 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 11:45:59,969 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 11:45:59,969 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 11:45:59,969 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 11:45:59,969 INFO L85 PathProgramCache]: Analyzing trace with hash -1569675135, now seen corresponding path program 1 times [2023-08-31 11:45:59,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 11:45:59,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073473681] [2023-08-31 11:45:59,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 11:45:59,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 11:45:59,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:45:59,988 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 11:45:59,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:46:00,051 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 11:46:00,051 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 11:46:00,051 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 11:46:00,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-31 11:46:00,052 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 11:46:00,052 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 11:46:00,052 WARN L233 ceAbstractionStarter]: 9 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 11:46:00,052 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 10 thread instances. [2023-08-31 11:46:00,238 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 11:46:00,247 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1425 places, 1495 transitions, 3130 flow [2023-08-31 11:46:01,108 INFO L130 PetriNetUnfolder]: 101/1613 cut-off events. [2023-08-31 11:46:01,108 INFO L131 PetriNetUnfolder]: For 210/210 co-relation queries the response was YES. [2023-08-31 11:46:01,169 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1699 conditions, 1613 events. 101/1613 cut-off events. For 210/210 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 9713 event pairs, 0 based on Foata normal form. 0/1241 useless extension candidates. Maximal degree in co-relation 1508. Up to 22 conditions per place. [2023-08-31 11:46:01,169 INFO L82 GeneralOperation]: Start removeDead. Operand has 1425 places, 1495 transitions, 3130 flow [2023-08-31 11:46:01,180 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1425 places, 1495 transitions, 3130 flow [2023-08-31 11:46:01,180 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 11:46:01,180 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1425 places, 1495 transitions, 3130 flow [2023-08-31 11:46:01,180 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1425 places, 1495 transitions, 3130 flow [2023-08-31 11:46:01,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1425 places, 1495 transitions, 3130 flow [2023-08-31 11:46:02,052 INFO L130 PetriNetUnfolder]: 101/1613 cut-off events. [2023-08-31 11:46:02,053 INFO L131 PetriNetUnfolder]: For 210/210 co-relation queries the response was YES. [2023-08-31 11:46:02,160 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1699 conditions, 1613 events. 101/1613 cut-off events. For 210/210 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 9713 event pairs, 0 based on Foata normal form. 0/1241 useless extension candidates. Maximal degree in co-relation 1508. Up to 22 conditions per place. [2023-08-31 11:46:02,556 INFO L119 LiptonReduction]: Number of co-enabled transitions 1943000 [2023-08-31 11:47:22,626 INFO L134 LiptonReduction]: Checked pairs total: 9282985 [2023-08-31 11:47:22,626 INFO L136 LiptonReduction]: Total number of compositions: 867 [2023-08-31 11:47:22,627 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 11:47:22,628 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;@709f2cc9, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 11:47:22,628 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 11:47:22,751 INFO L130 PetriNetUnfolder]: 39/615 cut-off events. [2023-08-31 11:47:22,751 INFO L131 PetriNetUnfolder]: For 210/210 co-relation queries the response was YES. [2023-08-31 11:47:22,751 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 11:47:22,751 INFO L208 CegarLoopForPetriNet]: trace histogram [11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 11:47:22,751 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 11:47:22,752 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 11:47:22,752 INFO L85 PathProgramCache]: Analyzing trace with hash -2052983187, now seen corresponding path program 1 times [2023-08-31 11:47:22,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 11:47:22,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936713518] [2023-08-31 11:47:22,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 11:47:22,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 11:47:22,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:47:22,774 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 11:47:22,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:47:22,811 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 11:47:22,817 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 11:47:22,817 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 11:47:22,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-31 11:47:22,817 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 11:47:22,818 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 11:47:22,818 WARN L233 ceAbstractionStarter]: 10 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 11:47:22,818 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 11 thread instances. [2023-08-31 11:47:23,048 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 11:47:23,056 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1564 places, 1641 transitions, 3447 flow [2023-08-31 11:47:24,028 INFO L130 PetriNetUnfolder]: 111/1771 cut-off events. [2023-08-31 11:47:24,028 INFO L131 PetriNetUnfolder]: For 275/275 co-relation queries the response was YES. [2023-08-31 11:47:24,104 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1871 conditions, 1771 events. 111/1771 cut-off events. For 275/275 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 10860 event pairs, 0 based on Foata normal form. 0/1362 useless extension candidates. Maximal degree in co-relation 1679. Up to 24 conditions per place. [2023-08-31 11:47:24,104 INFO L82 GeneralOperation]: Start removeDead. Operand has 1564 places, 1641 transitions, 3447 flow [2023-08-31 11:47:24,119 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1564 places, 1641 transitions, 3447 flow [2023-08-31 11:47:24,120 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 11:47:24,120 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1564 places, 1641 transitions, 3447 flow [2023-08-31 11:47:24,120 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1564 places, 1641 transitions, 3447 flow [2023-08-31 11:47:24,120 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1564 places, 1641 transitions, 3447 flow [2023-08-31 11:47:25,102 INFO L130 PetriNetUnfolder]: 111/1771 cut-off events. [2023-08-31 11:47:25,102 INFO L131 PetriNetUnfolder]: For 275/275 co-relation queries the response was YES. [2023-08-31 11:47:25,202 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1871 conditions, 1771 events. 111/1771 cut-off events. For 275/275 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 10860 event pairs, 0 based on Foata normal form. 0/1362 useless extension candidates. Maximal degree in co-relation 1679. Up to 24 conditions per place. [2023-08-31 11:47:25,698 INFO L119 LiptonReduction]: Number of co-enabled transitions 2370170 [2023-08-31 11:48:56,150 INFO L134 LiptonReduction]: Checked pairs total: 11311576 [2023-08-31 11:48:56,150 INFO L136 LiptonReduction]: Total number of compositions: 949 [2023-08-31 11:48:56,152 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 11:48:56,152 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@709f2cc9, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 11:48:56,152 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 11:48:56,290 INFO L130 PetriNetUnfolder]: 46/702 cut-off events. [2023-08-31 11:48:56,291 INFO L131 PetriNetUnfolder]: For 275/275 co-relation queries the response was YES. [2023-08-31 11:48:56,291 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 11:48:56,291 INFO L208 CegarLoopForPetriNet]: trace histogram [12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 11:48:56,291 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 11:48:56,291 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 11:48:56,291 INFO L85 PathProgramCache]: Analyzing trace with hash 1048373946, now seen corresponding path program 1 times [2023-08-31 11:48:56,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 11:48:56,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741216160] [2023-08-31 11:48:56,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 11:48:56,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 11:48:56,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:48:56,317 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 11:48:56,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:48:56,345 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 11:48:56,345 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 11:48:56,345 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 11:48:56,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-31 11:48:56,346 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 11:48:56,346 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 11:48:56,346 WARN L233 ceAbstractionStarter]: 11 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 11:48:56,346 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 12 thread instances. [2023-08-31 11:48:56,607 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 11:48:56,615 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1703 places, 1787 transitions, 3766 flow [2023-08-31 11:48:57,709 INFO L130 PetriNetUnfolder]: 121/1929 cut-off events. [2023-08-31 11:48:57,709 INFO L131 PetriNetUnfolder]: For 352/352 co-relation queries the response was YES. [2023-08-31 11:48:57,858 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2044 conditions, 1929 events. 121/1929 cut-off events. For 352/352 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 12044 event pairs, 0 based on Foata normal form. 0/1483 useless extension candidates. Maximal degree in co-relation 1851. Up to 26 conditions per place. [2023-08-31 11:48:57,858 INFO L82 GeneralOperation]: Start removeDead. Operand has 1703 places, 1787 transitions, 3766 flow [2023-08-31 11:48:57,883 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1703 places, 1787 transitions, 3766 flow [2023-08-31 11:48:57,883 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 11:48:57,883 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1703 places, 1787 transitions, 3766 flow [2023-08-31 11:48:57,883 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1703 places, 1787 transitions, 3766 flow [2023-08-31 11:48:57,883 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1703 places, 1787 transitions, 3766 flow [2023-08-31 11:48:58,973 INFO L130 PetriNetUnfolder]: 121/1929 cut-off events. [2023-08-31 11:48:58,973 INFO L131 PetriNetUnfolder]: For 352/352 co-relation queries the response was YES. [2023-08-31 11:48:59,140 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2044 conditions, 1929 events. 121/1929 cut-off events. For 352/352 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 12044 event pairs, 0 based on Foata normal form. 0/1483 useless extension candidates. Maximal degree in co-relation 1851. Up to 26 conditions per place. [2023-08-31 11:48:59,836 INFO L119 LiptonReduction]: Number of co-enabled transitions 2839680 [2023-08-31 11:50:22,140 INFO L134 LiptonReduction]: Checked pairs total: 13541224 [2023-08-31 11:50:22,141 INFO L136 LiptonReduction]: Total number of compositions: 1011 [2023-08-31 11:50:22,142 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 11:50:22,143 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;@709f2cc9, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 11:50:22,143 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 11:50:22,326 INFO L130 PetriNetUnfolder]: 53/796 cut-off events. [2023-08-31 11:50:22,327 INFO L131 PetriNetUnfolder]: For 352/352 co-relation queries the response was YES. [2023-08-31 11:50:22,327 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 11:50:22,327 INFO L208 CegarLoopForPetriNet]: trace histogram [13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 11:50:22,327 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 11:50:22,327 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 11:50:22,327 INFO L85 PathProgramCache]: Analyzing trace with hash 2052502642, now seen corresponding path program 1 times [2023-08-31 11:50:22,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 11:50:22,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386083657] [2023-08-31 11:50:22,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 11:50:22,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 11:50:22,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:50:22,361 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 11:50:22,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:50:22,396 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 11:50:22,397 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 11:50:22,397 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 11:50:22,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-31 11:50:22,397 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 11:50:22,398 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 11:50:22,398 WARN L233 ceAbstractionStarter]: 12 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 11:50:22,398 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 13 thread instances. [2023-08-31 11:50:22,794 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 11:50:22,804 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1842 places, 1933 transitions, 4087 flow [2023-08-31 11:50:24,295 INFO L130 PetriNetUnfolder]: 131/2087 cut-off events. [2023-08-31 11:50:24,295 INFO L131 PetriNetUnfolder]: For 442/442 co-relation queries the response was YES. [2023-08-31 11:50:24,433 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2218 conditions, 2087 events. 131/2087 cut-off events. For 442/442 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 13258 event pairs, 0 based on Foata normal form. 0/1604 useless extension candidates. Maximal degree in co-relation 2024. Up to 28 conditions per place. [2023-08-31 11:50:24,433 INFO L82 GeneralOperation]: Start removeDead. Operand has 1842 places, 1933 transitions, 4087 flow [2023-08-31 11:50:24,455 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1842 places, 1933 transitions, 4087 flow [2023-08-31 11:50:24,455 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 11:50:24,456 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1842 places, 1933 transitions, 4087 flow [2023-08-31 11:50:24,456 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1842 places, 1933 transitions, 4087 flow [2023-08-31 11:50:24,456 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1842 places, 1933 transitions, 4087 flow [2023-08-31 11:50:26,064 INFO L130 PetriNetUnfolder]: 131/2087 cut-off events. [2023-08-31 11:50:26,065 INFO L131 PetriNetUnfolder]: For 442/442 co-relation queries the response was YES. [2023-08-31 11:50:26,252 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2218 conditions, 2087 events. 131/2087 cut-off events. For 442/442 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 13258 event pairs, 0 based on Foata normal form. 0/1604 useless extension candidates. Maximal degree in co-relation 2024. Up to 28 conditions per place. [2023-08-31 11:50:27,090 INFO L119 LiptonReduction]: Number of co-enabled transitions 3351530 [2023-08-31 11:51:29,368 INFO L134 LiptonReduction]: Checked pairs total: 15976637 [2023-08-31 11:51:29,369 INFO L136 LiptonReduction]: Total number of compositions: 1099 [2023-08-31 11:51:29,371 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 11:51:29,371 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;@709f2cc9, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 11:51:29,371 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 11:51:29,606 INFO L130 PetriNetUnfolder]: 60/887 cut-off events. [2023-08-31 11:51:29,606 INFO L131 PetriNetUnfolder]: For 442/442 co-relation queries the response was YES. [2023-08-31 11:51:29,607 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 11:51:29,607 INFO L208 CegarLoopForPetriNet]: trace histogram [14, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 11:51:29,607 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 11:51:29,607 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 11:51:29,607 INFO L85 PathProgramCache]: Analyzing trace with hash -839188135, now seen corresponding path program 1 times [2023-08-31 11:51:29,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 11:51:29,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979746367] [2023-08-31 11:51:29,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 11:51:29,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 11:51:29,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:51:29,640 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 11:51:29,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:51:29,671 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 11:51:29,672 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 11:51:29,672 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 11:51:29,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-31 11:51:29,672 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 11:51:29,673 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 11:51:29,674 WARN L233 ceAbstractionStarter]: 13 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 11:51:29,674 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 14 thread instances. [2023-08-31 11:51:29,992 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 11:51:30,005 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1981 places, 2079 transitions, 4410 flow [2023-08-31 11:51:31,776 INFO L130 PetriNetUnfolder]: 141/2245 cut-off events. [2023-08-31 11:51:31,776 INFO L131 PetriNetUnfolder]: For 546/546 co-relation queries the response was YES. [2023-08-31 11:51:31,921 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2393 conditions, 2245 events. 141/2245 cut-off events. For 546/546 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 14421 event pairs, 0 based on Foata normal form. 0/1725 useless extension candidates. Maximal degree in co-relation 2198. Up to 30 conditions per place. [2023-08-31 11:51:31,921 INFO L82 GeneralOperation]: Start removeDead. Operand has 1981 places, 2079 transitions, 4410 flow [2023-08-31 11:51:31,944 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1981 places, 2079 transitions, 4410 flow [2023-08-31 11:51:31,944 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 11:51:31,944 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1981 places, 2079 transitions, 4410 flow [2023-08-31 11:51:31,944 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1981 places, 2079 transitions, 4410 flow [2023-08-31 11:51:31,944 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1981 places, 2079 transitions, 4410 flow [2023-08-31 11:51:34,127 INFO L130 PetriNetUnfolder]: 141/2245 cut-off events. [2023-08-31 11:51:34,127 INFO L131 PetriNetUnfolder]: For 546/546 co-relation queries the response was YES. [2023-08-31 11:51:34,392 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2393 conditions, 2245 events. 141/2245 cut-off events. For 546/546 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 14421 event pairs, 0 based on Foata normal form. 0/1725 useless extension candidates. Maximal degree in co-relation 2198. Up to 30 conditions per place. [2023-08-31 11:51:34,985 INFO L119 LiptonReduction]: Number of co-enabled transitions 3905720 [2023-08-31 11:53:03,202 INFO L134 LiptonReduction]: Checked pairs total: 16378385 [2023-08-31 11:53:03,202 INFO L136 LiptonReduction]: Total number of compositions: 1186 [2023-08-31 11:53:03,204 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-31 11:53:03,205 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;@709f2cc9, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 11:53:03,205 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-31 11:53:03,535 INFO L130 PetriNetUnfolder]: 67/979 cut-off events. [2023-08-31 11:53:03,536 INFO L131 PetriNetUnfolder]: For 546/546 co-relation queries the response was YES. [2023-08-31 11:53:03,536 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 11:53:03,536 INFO L208 CegarLoopForPetriNet]: trace histogram [15, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 11:53:03,536 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 11:53:03,536 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 11:53:03,536 INFO L85 PathProgramCache]: Analyzing trace with hash -1705700386, now seen corresponding path program 1 times [2023-08-31 11:53:03,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 11:53:03,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21833130] [2023-08-31 11:53:03,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 11:53:03,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 11:53:03,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:53:03,566 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-31 11:53:03,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-31 11:53:03,598 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-31 11:53:03,599 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-31 11:53:03,599 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-31 11:53:03,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-31 11:53:03,599 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-31 11:53:03,600 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-31 11:53:03,600 WARN L233 ceAbstractionStarter]: 14 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-31 11:53:03,600 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 15 thread instances. [2023-08-31 11:53:03,939 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-31 11:53:03,951 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2120 places, 2225 transitions, 4735 flow [2023-08-31 11:53:06,012 INFO L130 PetriNetUnfolder]: 151/2403 cut-off events. [2023-08-31 11:53:06,012 INFO L131 PetriNetUnfolder]: For 665/665 co-relation queries the response was YES. [2023-08-31 11:53:06,169 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2569 conditions, 2403 events. 151/2403 cut-off events. For 665/665 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 15578 event pairs, 0 based on Foata normal form. 0/1846 useless extension candidates. Maximal degree in co-relation 2373. Up to 32 conditions per place. [2023-08-31 11:53:06,169 INFO L82 GeneralOperation]: Start removeDead. Operand has 2120 places, 2225 transitions, 4735 flow [2023-08-31 11:53:06,194 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 2120 places, 2225 transitions, 4735 flow [2023-08-31 11:53:06,194 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 11:53:06,194 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 2120 places, 2225 transitions, 4735 flow [2023-08-31 11:53:06,194 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 2120 places, 2225 transitions, 4735 flow [2023-08-31 11:53:06,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 2120 places, 2225 transitions, 4735 flow [2023-08-31 11:53:08,048 INFO L130 PetriNetUnfolder]: 151/2403 cut-off events. [2023-08-31 11:53:08,048 INFO L131 PetriNetUnfolder]: For 665/665 co-relation queries the response was YES. [2023-08-31 11:53:08,215 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2569 conditions, 2403 events. 151/2403 cut-off events. For 665/665 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 15578 event pairs, 0 based on Foata normal form. 0/1846 useless extension candidates. Maximal degree in co-relation 2373. Up to 32 conditions per place. [2023-08-31 11:53:08,985 INFO L119 LiptonReduction]: Number of co-enabled transitions 4502250 Killed by 15