./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe025_pso.oepc_pso.opt_tso.oepc_tso.opt.i --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability 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-wmm/safe025_pso.oepc_pso.opt_tso.oepc_tso.opt.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-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 ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 9071d56f4666aca734ab742196d3aa15fce92ad6b7c276706d2cff43d2d6147a --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 23:21:18,434 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 23:21:18,435 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 23:21:18,453 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 23:21:18,453 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 23:21:18,454 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 23:21:18,455 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 23:21:18,456 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 23:21:18,457 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 23:21:18,458 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 23:21:18,458 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 23:21:18,459 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 23:21:18,459 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 23:21:18,460 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 23:21:18,460 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 23:21:18,461 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 23:21:18,466 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 23:21:18,469 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 23:21:18,470 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 23:21:18,472 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 23:21:18,474 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 23:21:18,474 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 23:21:18,475 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 23:21:18,476 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 23:21:18,478 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 23:21:18,478 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 23:21:18,478 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 23:21:18,478 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 23:21:18,479 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 23:21:18,479 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 23:21:18,479 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 23:21:18,480 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 23:21:18,480 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 23:21:18,481 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 23:21:18,481 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 23:21:18,482 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 23:21:18,482 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 23:21:18,482 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 23:21:18,482 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 23:21:18,483 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 23:21:18,483 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 23:21:18,486 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-30 23:21:18,504 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 23:21:18,504 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 23:21:18,505 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 23:21:18,505 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 23:21:18,506 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 23:21:18,506 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 23:21:18,507 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 23:21:18,507 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 23:21:18,507 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 23:21:18,507 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 23:21:18,508 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 23:21:18,508 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 23:21:18,508 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 23:21:18,508 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 23:21:18,508 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-30 23:21:18,508 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 23:21:18,508 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-30 23:21:18,508 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 23:21:18,509 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-30 23:21:18,509 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 23:21:18,509 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-30 23:21:18,509 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 23:21:18,509 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 23:21:18,509 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 23:21:18,509 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 23:21:18,510 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 23:21:18,510 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 23:21:18,510 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-30 23:21:18,510 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 23:21:18,510 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 23:21:18,510 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 23:21:18,510 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-30 23:21:18,511 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 23:21:18,511 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 23:21:18,511 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 23:21:18,511 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9071d56f4666aca734ab742196d3aa15fce92ad6b7c276706d2cff43d2d6147a Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 23:21:18,770 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 23:21:18,785 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 23:21:18,787 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 23:21:18,788 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 23:21:18,788 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 23:21:18,789 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe025_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2023-08-30 23:21:19,739 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 23:21:19,932 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 23:21:19,933 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe025_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2023-08-30 23:21:19,944 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a02512ff2/f1b5552fa0124896a57e165da57a7285/FLAG98d27babc [2023-08-30 23:21:19,961 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a02512ff2/f1b5552fa0124896a57e165da57a7285 [2023-08-30 23:21:19,964 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 23:21:19,965 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 23:21:19,966 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 23:21:19,966 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 23:21:19,968 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 23:21:19,968 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 11:21:19" (1/1) ... [2023-08-30 23:21:19,970 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1df03e22 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:21:19, skipping insertion in model container [2023-08-30 23:21:19,970 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 11:21:19" (1/1) ... [2023-08-30 23:21:19,975 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 23:21:20,014 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 23:21:20,144 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-wmm/safe025_pso.oepc_pso.opt_tso.oepc_tso.opt.i[975,988] [2023-08-30 23:21:20,236 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 23:21:20,247 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 23:21:20,258 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-wmm/safe025_pso.oepc_pso.opt_tso.oepc_tso.opt.i[975,988] [2023-08-30 23:21:20,298 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 23:21:20,331 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 23:21:20,331 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 23:21:20,335 INFO L208 MainTranslator]: Completed translation [2023-08-30 23:21:20,336 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:21:20 WrapperNode [2023-08-30 23:21:20,336 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 23:21:20,336 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 23:21:20,337 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 23:21:20,337 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 23:21:20,341 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:21:20" (1/1) ... [2023-08-30 23:21:20,349 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:21:20" (1/1) ... [2023-08-30 23:21:20,361 INFO L138 Inliner]: procedures = 176, calls = 55, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 71 [2023-08-30 23:21:20,362 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 23:21:20,362 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 23:21:20,362 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 23:21:20,362 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 23:21:20,368 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:21:20" (1/1) ... [2023-08-30 23:21:20,368 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:21:20" (1/1) ... [2023-08-30 23:21:20,370 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:21:20" (1/1) ... [2023-08-30 23:21:20,370 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:21:20" (1/1) ... [2023-08-30 23:21:20,373 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:21:20" (1/1) ... [2023-08-30 23:21:20,374 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:21:20" (1/1) ... [2023-08-30 23:21:20,375 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:21:20" (1/1) ... [2023-08-30 23:21:20,376 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:21:20" (1/1) ... [2023-08-30 23:21:20,377 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 23:21:20,378 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 23:21:20,378 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 23:21:20,378 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 23:21:20,379 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:21:20" (1/1) ... [2023-08-30 23:21:20,382 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 23:21:20,389 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 23:21:20,398 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) [2023-08-30 23:21:20,408 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 [2023-08-30 23:21:20,424 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 23:21:20,424 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-30 23:21:20,424 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 23:21:20,424 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 23:21:20,425 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 23:21:20,425 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2023-08-30 23:21:20,425 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2023-08-30 23:21:20,425 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2023-08-30 23:21:20,425 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2023-08-30 23:21:20,425 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2023-08-30 23:21:20,425 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2023-08-30 23:21:20,425 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 23:21:20,426 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-30 23:21:20,426 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 23:21:20,426 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 23:21:20,427 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-30 23:21:20,505 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 23:21:20,506 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 23:21:20,664 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 23:21:20,668 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 23:21:20,668 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-08-30 23:21:20,669 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 11:21:20 BoogieIcfgContainer [2023-08-30 23:21:20,670 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 23:21:20,671 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 23:21:20,671 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 23:21:20,673 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 23:21:20,673 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 11:21:19" (1/3) ... [2023-08-30 23:21:20,674 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@753ec5af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 11:21:20, skipping insertion in model container [2023-08-30 23:21:20,674 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 11:21:20" (2/3) ... [2023-08-30 23:21:20,674 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@753ec5af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 11:21:20, skipping insertion in model container [2023-08-30 23:21:20,674 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 11:21:20" (3/3) ... [2023-08-30 23:21:20,675 INFO L112 eAbstractionObserver]: Analyzing ICFG safe025_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2023-08-30 23:21:20,680 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-30 23:21:20,686 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 23:21:20,686 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-30 23:21:20,686 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 23:21:20,729 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-30 23:21:20,770 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 93 places, 85 transitions, 185 flow [2023-08-30 23:21:20,815 INFO L130 PetriNetUnfolder]: 2/82 cut-off events. [2023-08-30 23:21:20,816 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 23:21:20,819 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92 conditions, 82 events. 2/82 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 47 event pairs, 0 based on Foata normal form. 0/79 useless extension candidates. Maximal degree in co-relation 64. Up to 2 conditions per place. [2023-08-30 23:21:20,819 INFO L82 GeneralOperation]: Start removeDead. Operand has 93 places, 85 transitions, 185 flow [2023-08-30 23:21:20,822 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 79 places, 70 transitions, 149 flow [2023-08-30 23:21:20,825 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 23:21:20,833 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 79 places, 70 transitions, 149 flow [2023-08-30 23:21:20,838 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 79 places, 70 transitions, 149 flow [2023-08-30 23:21:20,838 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 79 places, 70 transitions, 149 flow [2023-08-30 23:21:20,868 INFO L130 PetriNetUnfolder]: 1/70 cut-off events. [2023-08-30 23:21:20,869 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 23:21:20,869 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80 conditions, 70 events. 1/70 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 38 event pairs, 0 based on Foata normal form. 0/69 useless extension candidates. Maximal degree in co-relation 52. Up to 2 conditions per place. [2023-08-30 23:21:20,871 INFO L119 LiptonReduction]: Number of co-enabled transitions 1044 [2023-08-30 23:21:22,426 INFO L134 LiptonReduction]: Checked pairs total: 2098 [2023-08-30 23:21:22,427 INFO L136 LiptonReduction]: Total number of compositions: 58 [2023-08-30 23:21:22,435 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 23:21:22,439 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;@4c9493bd, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 23:21:22,439 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-30 23:21:22,442 INFO L130 PetriNetUnfolder]: 0/14 cut-off events. [2023-08-30 23:21:22,443 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 23:21:22,443 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 23:21:22,443 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 23:21:22,444 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 23:21:22,448 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 23:21:22,448 INFO L85 PathProgramCache]: Analyzing trace with hash 1331089238, now seen corresponding path program 1 times [2023-08-30 23:21:22,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 23:21:22,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145575547] [2023-08-30 23:21:22,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 23:21:22,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 23:21:22,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 23:21:22,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 23:21:22,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 23:21:22,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145575547] [2023-08-30 23:21:22,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145575547] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 23:21:22,775 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 23:21:22,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 23:21:22,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698634768] [2023-08-30 23:21:22,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 23:21:22,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 23:21:22,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 23:21:22,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 23:21:22,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 23:21:22,812 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 143 [2023-08-30 23:21:22,814 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 18 transitions, 45 flow. Second operand has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 3 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:21:22,814 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 23:21:22,814 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 143 [2023-08-30 23:21:22,815 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 23:21:22,930 INFO L130 PetriNetUnfolder]: 551/886 cut-off events. [2023-08-30 23:21:22,931 INFO L131 PetriNetUnfolder]: For 18/18 co-relation queries the response was YES. [2023-08-30 23:21:22,934 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1827 conditions, 886 events. 551/886 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 3724 event pairs, 188 based on Foata normal form. 42/928 useless extension candidates. Maximal degree in co-relation 1816. Up to 543 conditions per place. [2023-08-30 23:21:22,938 INFO L137 encePairwiseOnDemand]: 135/143 looper letters, 23 selfloop transitions, 6 changer transitions 0/29 dead transitions. [2023-08-30 23:21:22,938 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 29 transitions, 128 flow [2023-08-30 23:21:22,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 23:21:22,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 23:21:22,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 242 transitions. [2023-08-30 23:21:22,950 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5641025641025641 [2023-08-30 23:21:22,951 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 242 transitions. [2023-08-30 23:21:22,951 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 242 transitions. [2023-08-30 23:21:22,952 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 23:21:22,954 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 242 transitions. [2023-08-30 23:21:22,957 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 80.66666666666667) internal successors, (242), 3 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:21:22,960 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 143.0) internal successors, (572), 4 states have internal predecessors, (572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:21:22,960 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 143.0) internal successors, (572), 4 states have internal predecessors, (572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:21:22,961 INFO L175 Difference]: Start difference. First operand has 27 places, 18 transitions, 45 flow. Second operand 3 states and 242 transitions. [2023-08-30 23:21:22,962 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 29 transitions, 128 flow [2023-08-30 23:21:22,963 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 29 transitions, 124 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 23:21:22,964 INFO L231 Difference]: Finished difference. Result has 28 places, 22 transitions, 86 flow [2023-08-30 23:21:22,965 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=143, PETRI_DIFFERENCE_MINUEND_FLOW=40, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=86, PETRI_PLACES=28, PETRI_TRANSITIONS=22} [2023-08-30 23:21:22,969 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 1 predicate places. [2023-08-30 23:21:22,969 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 22 transitions, 86 flow [2023-08-30 23:21:22,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 3 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:21:22,970 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 23:21:22,970 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 23:21:22,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 23:21:22,971 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 23:21:22,971 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 23:21:22,971 INFO L85 PathProgramCache]: Analyzing trace with hash -1685907729, now seen corresponding path program 1 times [2023-08-30 23:21:22,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 23:21:22,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741615114] [2023-08-30 23:21:22,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 23:21:22,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 23:21:22,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 23:21:23,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 23:21:23,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 23:21:23,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741615114] [2023-08-30 23:21:23,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741615114] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 23:21:23,167 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 23:21:23,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 23:21:23,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063609189] [2023-08-30 23:21:23,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 23:21:23,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 23:21:23,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 23:21:23,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 23:21:23,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 23:21:23,198 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 143 [2023-08-30 23:21:23,199 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 22 transitions, 86 flow. Second operand has 4 states, 4 states have (on average 72.25) internal successors, (289), 4 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:21:23,199 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 23:21:23,199 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 143 [2023-08-30 23:21:23,199 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 23:21:23,283 INFO L130 PetriNetUnfolder]: 505/816 cut-off events. [2023-08-30 23:21:23,283 INFO L131 PetriNetUnfolder]: For 260/260 co-relation queries the response was YES. [2023-08-30 23:21:23,285 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2214 conditions, 816 events. 505/816 cut-off events. For 260/260 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 3324 event pairs, 121 based on Foata normal form. 12/828 useless extension candidates. Maximal degree in co-relation 2202. Up to 455 conditions per place. [2023-08-30 23:21:23,287 INFO L137 encePairwiseOnDemand]: 136/143 looper letters, 33 selfloop transitions, 7 changer transitions 0/40 dead transitions. [2023-08-30 23:21:23,287 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 40 transitions, 222 flow [2023-08-30 23:21:23,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 23:21:23,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 23:21:23,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 318 transitions. [2023-08-30 23:21:23,291 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5559440559440559 [2023-08-30 23:21:23,291 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 318 transitions. [2023-08-30 23:21:23,292 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 318 transitions. [2023-08-30 23:21:23,292 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 23:21:23,292 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 318 transitions. [2023-08-30 23:21:23,293 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 79.5) internal successors, (318), 4 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:21:23,295 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 143.0) internal successors, (715), 5 states have internal predecessors, (715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:21:23,296 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 143.0) internal successors, (715), 5 states have internal predecessors, (715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:21:23,296 INFO L175 Difference]: Start difference. First operand has 28 places, 22 transitions, 86 flow. Second operand 4 states and 318 transitions. [2023-08-30 23:21:23,296 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 40 transitions, 222 flow [2023-08-30 23:21:23,300 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 40 transitions, 204 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 23:21:23,300 INFO L231 Difference]: Finished difference. Result has 32 places, 25 transitions, 122 flow [2023-08-30 23:21:23,301 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=143, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=122, PETRI_PLACES=32, PETRI_TRANSITIONS=25} [2023-08-30 23:21:23,301 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 5 predicate places. [2023-08-30 23:21:23,301 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 25 transitions, 122 flow [2023-08-30 23:21:23,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 72.25) internal successors, (289), 4 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:21:23,302 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 23:21:23,302 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 23:21:23,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-30 23:21:23,303 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 23:21:23,304 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 23:21:23,304 INFO L85 PathProgramCache]: Analyzing trace with hash -723512641, now seen corresponding path program 1 times [2023-08-30 23:21:23,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 23:21:23,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186702465] [2023-08-30 23:21:23,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 23:21:23,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 23:21:23,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 23:21:23,427 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 23:21:23,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 23:21:23,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186702465] [2023-08-30 23:21:23,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186702465] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 23:21:23,428 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 23:21:23,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 23:21:23,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243760639] [2023-08-30 23:21:23,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 23:21:23,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 23:21:23,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 23:21:23,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 23:21:23,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 23:21:23,443 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 143 [2023-08-30 23:21:23,445 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 25 transitions, 122 flow. Second operand has 4 states, 4 states have (on average 72.5) internal successors, (290), 4 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:21:23,445 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 23:21:23,445 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 143 [2023-08-30 23:21:23,445 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 23:21:23,513 INFO L130 PetriNetUnfolder]: 483/782 cut-off events. [2023-08-30 23:21:23,513 INFO L131 PetriNetUnfolder]: For 657/657 co-relation queries the response was YES. [2023-08-30 23:21:23,515 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2356 conditions, 782 events. 483/782 cut-off events. For 657/657 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 3126 event pairs, 123 based on Foata normal form. 8/790 useless extension candidates. Maximal degree in co-relation 2341. Up to 407 conditions per place. [2023-08-30 23:21:23,518 INFO L137 encePairwiseOnDemand]: 136/143 looper letters, 28 selfloop transitions, 10 changer transitions 0/38 dead transitions. [2023-08-30 23:21:23,518 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 38 transitions, 244 flow [2023-08-30 23:21:23,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 23:21:23,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 23:21:23,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 314 transitions. [2023-08-30 23:21:23,519 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.548951048951049 [2023-08-30 23:21:23,519 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 314 transitions. [2023-08-30 23:21:23,519 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 314 transitions. [2023-08-30 23:21:23,520 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 23:21:23,520 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 314 transitions. [2023-08-30 23:21:23,520 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 78.5) internal successors, (314), 4 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:21:23,521 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 143.0) internal successors, (715), 5 states have internal predecessors, (715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:21:23,521 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 143.0) internal successors, (715), 5 states have internal predecessors, (715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:21:23,522 INFO L175 Difference]: Start difference. First operand has 32 places, 25 transitions, 122 flow. Second operand 4 states and 314 transitions. [2023-08-30 23:21:23,522 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 38 transitions, 244 flow [2023-08-30 23:21:23,540 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 38 transitions, 240 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 23:21:23,540 INFO L231 Difference]: Finished difference. Result has 37 places, 27 transitions, 181 flow [2023-08-30 23:21:23,540 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=143, PETRI_DIFFERENCE_MINUEND_FLOW=119, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=181, PETRI_PLACES=37, PETRI_TRANSITIONS=27} [2023-08-30 23:21:23,541 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 10 predicate places. [2023-08-30 23:21:23,541 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 27 transitions, 181 flow [2023-08-30 23:21:23,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 72.5) internal successors, (290), 4 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:21:23,541 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 23:21:23,541 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 23:21:23,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-30 23:21:23,542 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 23:21:23,542 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 23:21:23,542 INFO L85 PathProgramCache]: Analyzing trace with hash -697334412, now seen corresponding path program 1 times [2023-08-30 23:21:23,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 23:21:23,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971295438] [2023-08-30 23:21:23,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 23:21:23,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 23:21:23,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 23:21:23,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 23:21:23,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 23:21:23,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971295438] [2023-08-30 23:21:23,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971295438] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 23:21:23,633 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 23:21:23,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 23:21:23,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348615300] [2023-08-30 23:21:23,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 23:21:23,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 23:21:23,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 23:21:23,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 23:21:23,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 23:21:23,649 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 143 [2023-08-30 23:21:23,649 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 27 transitions, 181 flow. Second operand has 4 states, 4 states have (on average 72.5) internal successors, (290), 4 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:21:23,649 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 23:21:23,649 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 143 [2023-08-30 23:21:23,649 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 23:21:23,725 INFO L130 PetriNetUnfolder]: 447/728 cut-off events. [2023-08-30 23:21:23,726 INFO L131 PetriNetUnfolder]: For 1118/1118 co-relation queries the response was YES. [2023-08-30 23:21:23,732 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2511 conditions, 728 events. 447/728 cut-off events. For 1118/1118 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 2953 event pairs, 97 based on Foata normal form. 12/740 useless extension candidates. Maximal degree in co-relation 2492. Up to 377 conditions per place. [2023-08-30 23:21:23,734 INFO L137 encePairwiseOnDemand]: 136/143 looper letters, 32 selfloop transitions, 13 changer transitions 0/45 dead transitions. [2023-08-30 23:21:23,734 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 45 transitions, 345 flow [2023-08-30 23:21:23,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 23:21:23,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 23:21:23,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 318 transitions. [2023-08-30 23:21:23,739 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5559440559440559 [2023-08-30 23:21:23,739 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 318 transitions. [2023-08-30 23:21:23,739 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 318 transitions. [2023-08-30 23:21:23,740 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 23:21:23,740 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 318 transitions. [2023-08-30 23:21:23,740 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 79.5) internal successors, (318), 4 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:21:23,741 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 143.0) internal successors, (715), 5 states have internal predecessors, (715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:21:23,741 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 143.0) internal successors, (715), 5 states have internal predecessors, (715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:21:23,741 INFO L175 Difference]: Start difference. First operand has 37 places, 27 transitions, 181 flow. Second operand 4 states and 318 transitions. [2023-08-30 23:21:23,741 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 45 transitions, 345 flow [2023-08-30 23:21:23,746 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 45 transitions, 340 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 23:21:23,747 INFO L231 Difference]: Finished difference. Result has 42 places, 30 transitions, 272 flow [2023-08-30 23:21:23,747 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=143, PETRI_DIFFERENCE_MINUEND_FLOW=177, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=272, PETRI_PLACES=42, PETRI_TRANSITIONS=30} [2023-08-30 23:21:23,748 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 15 predicate places. [2023-08-30 23:21:23,749 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 30 transitions, 272 flow [2023-08-30 23:21:23,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 72.5) internal successors, (290), 4 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:21:23,749 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 23:21:23,749 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 23:21:23,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-30 23:21:23,749 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 23:21:23,750 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 23:21:23,750 INFO L85 PathProgramCache]: Analyzing trace with hash -954056538, now seen corresponding path program 1 times [2023-08-30 23:21:23,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 23:21:23,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106828368] [2023-08-30 23:21:23,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 23:21:23,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 23:21:23,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 23:21:23,887 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 23:21:23,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 23:21:23,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106828368] [2023-08-30 23:21:23,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106828368] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 23:21:23,887 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 23:21:23,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 23:21:23,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423125409] [2023-08-30 23:21:23,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 23:21:23,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 23:21:23,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 23:21:23,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 23:21:23,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 23:21:23,892 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 143 [2023-08-30 23:21:23,892 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 30 transitions, 272 flow. Second operand has 3 states, 3 states have (on average 78.33333333333333) internal successors, (235), 3 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:21:23,892 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 23:21:23,893 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 143 [2023-08-30 23:21:23,893 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 23:21:23,936 INFO L130 PetriNetUnfolder]: 207/400 cut-off events. [2023-08-30 23:21:23,936 INFO L131 PetriNetUnfolder]: For 1182/1196 co-relation queries the response was YES. [2023-08-30 23:21:23,937 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1506 conditions, 400 events. 207/400 cut-off events. For 1182/1196 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 1834 event pairs, 58 based on Foata normal form. 24/404 useless extension candidates. Maximal degree in co-relation 1483. Up to 288 conditions per place. [2023-08-30 23:21:23,938 INFO L137 encePairwiseOnDemand]: 138/143 looper letters, 28 selfloop transitions, 4 changer transitions 0/44 dead transitions. [2023-08-30 23:21:23,938 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 44 transitions, 430 flow [2023-08-30 23:21:23,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 23:21:23,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 23:21:23,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 250 transitions. [2023-08-30 23:21:23,939 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5827505827505828 [2023-08-30 23:21:23,939 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 250 transitions. [2023-08-30 23:21:23,939 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 250 transitions. [2023-08-30 23:21:23,939 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 23:21:23,939 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 250 transitions. [2023-08-30 23:21:23,940 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 83.33333333333333) internal successors, (250), 3 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:21:23,940 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 143.0) internal successors, (572), 4 states have internal predecessors, (572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:21:23,941 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 143.0) internal successors, (572), 4 states have internal predecessors, (572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:21:23,941 INFO L175 Difference]: Start difference. First operand has 42 places, 30 transitions, 272 flow. Second operand 3 states and 250 transitions. [2023-08-30 23:21:23,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 44 transitions, 430 flow [2023-08-30 23:21:23,943 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 44 transitions, 423 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 23:21:23,943 INFO L231 Difference]: Finished difference. Result has 44 places, 33 transitions, 293 flow [2023-08-30 23:21:23,943 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=143, PETRI_DIFFERENCE_MINUEND_FLOW=267, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=293, PETRI_PLACES=44, PETRI_TRANSITIONS=33} [2023-08-30 23:21:23,944 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 17 predicate places. [2023-08-30 23:21:23,944 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 33 transitions, 293 flow [2023-08-30 23:21:23,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 78.33333333333333) internal successors, (235), 3 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:21:23,944 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 23:21:23,944 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 23:21:23,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-30 23:21:23,945 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 23:21:23,945 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 23:21:23,945 INFO L85 PathProgramCache]: Analyzing trace with hash -486417214, now seen corresponding path program 1 times [2023-08-30 23:21:23,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 23:21:23,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504509161] [2023-08-30 23:21:23,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 23:21:23,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 23:21:23,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 23:21:24,038 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 23:21:24,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 23:21:24,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504509161] [2023-08-30 23:21:24,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504509161] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 23:21:24,039 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 23:21:24,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 23:21:24,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300741324] [2023-08-30 23:21:24,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 23:21:24,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 23:21:24,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 23:21:24,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 23:21:24,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 23:21:24,049 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 143 [2023-08-30 23:21:24,050 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 33 transitions, 293 flow. Second operand has 4 states, 4 states have (on average 77.75) internal successors, (311), 4 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:21:24,050 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 23:21:24,050 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 143 [2023-08-30 23:21:24,050 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 23:21:24,091 INFO L130 PetriNetUnfolder]: 135/282 cut-off events. [2023-08-30 23:21:24,091 INFO L131 PetriNetUnfolder]: For 872/914 co-relation queries the response was YES. [2023-08-30 23:21:24,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1239 conditions, 282 events. 135/282 cut-off events. For 872/914 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1212 event pairs, 28 based on Foata normal form. 56/325 useless extension candidates. Maximal degree in co-relation 1213. Up to 115 conditions per place. [2023-08-30 23:21:24,093 INFO L137 encePairwiseOnDemand]: 138/143 looper letters, 35 selfloop transitions, 7 changer transitions 0/54 dead transitions. [2023-08-30 23:21:24,093 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 54 transitions, 529 flow [2023-08-30 23:21:24,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 23:21:24,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 23:21:24,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 333 transitions. [2023-08-30 23:21:24,095 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5821678321678322 [2023-08-30 23:21:24,095 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 333 transitions. [2023-08-30 23:21:24,095 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 333 transitions. [2023-08-30 23:21:24,095 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 23:21:24,095 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 333 transitions. [2023-08-30 23:21:24,097 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 83.25) internal successors, (333), 4 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:21:24,097 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 143.0) internal successors, (715), 5 states have internal predecessors, (715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:21:24,098 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 143.0) internal successors, (715), 5 states have internal predecessors, (715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:21:24,098 INFO L175 Difference]: Start difference. First operand has 44 places, 33 transitions, 293 flow. Second operand 4 states and 333 transitions. [2023-08-30 23:21:24,098 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 54 transitions, 529 flow [2023-08-30 23:21:24,100 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 54 transitions, 525 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 23:21:24,101 INFO L231 Difference]: Finished difference. Result has 47 places, 36 transitions, 329 flow [2023-08-30 23:21:24,101 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=143, PETRI_DIFFERENCE_MINUEND_FLOW=289, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=329, PETRI_PLACES=47, PETRI_TRANSITIONS=36} [2023-08-30 23:21:24,103 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 20 predicate places. [2023-08-30 23:21:24,104 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 36 transitions, 329 flow [2023-08-30 23:21:24,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 77.75) internal successors, (311), 4 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:21:24,104 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 23:21:24,105 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 23:21:24,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-30 23:21:24,105 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 23:21:24,105 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 23:21:24,105 INFO L85 PathProgramCache]: Analyzing trace with hash 1478328536, now seen corresponding path program 1 times [2023-08-30 23:21:24,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 23:21:24,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227288751] [2023-08-30 23:21:24,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 23:21:24,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 23:21:24,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 23:21:24,247 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 23:21:24,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 23:21:24,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227288751] [2023-08-30 23:21:24,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227288751] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 23:21:24,248 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 23:21:24,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 23:21:24,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644809899] [2023-08-30 23:21:24,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 23:21:24,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 23:21:24,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 23:21:24,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 23:21:24,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-30 23:21:24,255 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 143 [2023-08-30 23:21:24,256 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 36 transitions, 329 flow. Second operand has 5 states, 5 states have (on average 77.4) internal successors, (387), 5 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:21:24,256 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 23:21:24,256 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 143 [2023-08-30 23:21:24,256 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 23:21:24,301 INFO L130 PetriNetUnfolder]: 119/244 cut-off events. [2023-08-30 23:21:24,301 INFO L131 PetriNetUnfolder]: For 1018/1092 co-relation queries the response was YES. [2023-08-30 23:21:24,302 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1173 conditions, 244 events. 119/244 cut-off events. For 1018/1092 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1025 event pairs, 24 based on Foata normal form. 62/294 useless extension candidates. Maximal degree in co-relation 1145. Up to 91 conditions per place. [2023-08-30 23:21:24,304 INFO L137 encePairwiseOnDemand]: 138/143 looper letters, 31 selfloop transitions, 10 changer transitions 1/54 dead transitions. [2023-08-30 23:21:24,304 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 54 transitions, 553 flow [2023-08-30 23:21:24,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 23:21:24,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 23:21:24,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 408 transitions. [2023-08-30 23:21:24,317 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5706293706293706 [2023-08-30 23:21:24,318 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 408 transitions. [2023-08-30 23:21:24,318 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 408 transitions. [2023-08-30 23:21:24,318 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 23:21:24,318 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 408 transitions. [2023-08-30 23:21:24,319 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 81.6) internal successors, (408), 5 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:21:24,319 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 143.0) internal successors, (858), 6 states have internal predecessors, (858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:21:24,319 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 143.0) internal successors, (858), 6 states have internal predecessors, (858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:21:24,320 INFO L175 Difference]: Start difference. First operand has 47 places, 36 transitions, 329 flow. Second operand 5 states and 408 transitions. [2023-08-30 23:21:24,320 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 54 transitions, 553 flow [2023-08-30 23:21:24,322 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 54 transitions, 506 flow, removed 6 selfloop flow, removed 5 redundant places. [2023-08-30 23:21:24,322 INFO L231 Difference]: Finished difference. Result has 47 places, 36 transitions, 324 flow [2023-08-30 23:21:24,322 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=143, PETRI_DIFFERENCE_MINUEND_FLOW=296, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=324, PETRI_PLACES=47, PETRI_TRANSITIONS=36} [2023-08-30 23:21:24,323 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 20 predicate places. [2023-08-30 23:21:24,323 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 36 transitions, 324 flow [2023-08-30 23:21:24,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 77.4) internal successors, (387), 5 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:21:24,323 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 23:21:24,323 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 23:21:24,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-30 23:21:24,323 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 23:21:24,324 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 23:21:24,324 INFO L85 PathProgramCache]: Analyzing trace with hash -1070940220, now seen corresponding path program 1 times [2023-08-30 23:21:24,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 23:21:24,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59311985] [2023-08-30 23:21:24,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 23:21:24,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 23:21:24,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 23:21:24,425 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 23:21:24,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 23:21:24,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59311985] [2023-08-30 23:21:24,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59311985] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 23:21:24,426 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 23:21:24,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 23:21:24,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790450312] [2023-08-30 23:21:24,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 23:21:24,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 23:21:24,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 23:21:24,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 23:21:24,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-30 23:21:24,436 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 143 [2023-08-30 23:21:24,437 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 36 transitions, 324 flow. Second operand has 5 states, 5 states have (on average 73.4) internal successors, (367), 5 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:21:24,437 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 23:21:24,437 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 143 [2023-08-30 23:21:24,437 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 23:21:24,522 INFO L130 PetriNetUnfolder]: 222/415 cut-off events. [2023-08-30 23:21:24,522 INFO L131 PetriNetUnfolder]: For 1522/1522 co-relation queries the response was YES. [2023-08-30 23:21:24,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1983 conditions, 415 events. 222/415 cut-off events. For 1522/1522 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1701 event pairs, 34 based on Foata normal form. 1/416 useless extension candidates. Maximal degree in co-relation 1957. Up to 155 conditions per place. [2023-08-30 23:21:24,524 INFO L137 encePairwiseOnDemand]: 136/143 looper letters, 39 selfloop transitions, 13 changer transitions 32/84 dead transitions. [2023-08-30 23:21:24,524 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 84 transitions, 820 flow [2023-08-30 23:21:24,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 23:21:24,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 23:21:24,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 472 transitions. [2023-08-30 23:21:24,525 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5501165501165501 [2023-08-30 23:21:24,526 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 472 transitions. [2023-08-30 23:21:24,526 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 472 transitions. [2023-08-30 23:21:24,526 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 23:21:24,526 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 472 transitions. [2023-08-30 23:21:24,527 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 78.66666666666667) internal successors, (472), 6 states have internal predecessors, (472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:21:24,527 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 143.0) internal successors, (1001), 7 states have internal predecessors, (1001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:21:24,528 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 143.0) internal successors, (1001), 7 states have internal predecessors, (1001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:21:24,528 INFO L175 Difference]: Start difference. First operand has 47 places, 36 transitions, 324 flow. Second operand 6 states and 472 transitions. [2023-08-30 23:21:24,528 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 84 transitions, 820 flow [2023-08-30 23:21:24,531 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 84 transitions, 734 flow, removed 18 selfloop flow, removed 3 redundant places. [2023-08-30 23:21:24,532 INFO L231 Difference]: Finished difference. Result has 51 places, 35 transitions, 319 flow [2023-08-30 23:21:24,532 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=143, PETRI_DIFFERENCE_MINUEND_FLOW=298, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=319, PETRI_PLACES=51, PETRI_TRANSITIONS=35} [2023-08-30 23:21:24,532 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 24 predicate places. [2023-08-30 23:21:24,532 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 35 transitions, 319 flow [2023-08-30 23:21:24,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 73.4) internal successors, (367), 5 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:21:24,533 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 23:21:24,533 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 23:21:24,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-30 23:21:24,533 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 23:21:24,533 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 23:21:24,533 INFO L85 PathProgramCache]: Analyzing trace with hash 1255203528, now seen corresponding path program 2 times [2023-08-30 23:21:24,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 23:21:24,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26994549] [2023-08-30 23:21:24,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 23:21:24,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 23:21:24,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 23:21:24,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 23:21:24,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 23:21:24,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26994549] [2023-08-30 23:21:24,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26994549] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 23:21:24,614 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 23:21:24,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 23:21:24,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318801289] [2023-08-30 23:21:24,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 23:21:24,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 23:21:24,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 23:21:24,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 23:21:24,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 23:21:24,621 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 143 [2023-08-30 23:21:24,621 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 35 transitions, 319 flow. Second operand has 4 states, 4 states have (on average 78.75) internal successors, (315), 4 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:21:24,622 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 23:21:24,622 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 143 [2023-08-30 23:21:24,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 23:21:24,668 INFO L130 PetriNetUnfolder]: 143/314 cut-off events. [2023-08-30 23:21:24,669 INFO L131 PetriNetUnfolder]: For 1523/1535 co-relation queries the response was YES. [2023-08-30 23:21:24,669 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1509 conditions, 314 events. 143/314 cut-off events. For 1523/1535 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1457 event pairs, 21 based on Foata normal form. 5/317 useless extension candidates. Maximal degree in co-relation 1490. Up to 160 conditions per place. [2023-08-30 23:21:24,670 INFO L137 encePairwiseOnDemand]: 140/143 looper letters, 21 selfloop transitions, 1 changer transitions 38/62 dead transitions. [2023-08-30 23:21:24,670 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 62 transitions, 623 flow [2023-08-30 23:21:24,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 23:21:24,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 23:21:24,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 330 transitions. [2023-08-30 23:21:24,671 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5769230769230769 [2023-08-30 23:21:24,671 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 330 transitions. [2023-08-30 23:21:24,671 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 330 transitions. [2023-08-30 23:21:24,671 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 23:21:24,671 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 330 transitions. [2023-08-30 23:21:24,672 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 82.5) internal successors, (330), 4 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:21:24,672 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 143.0) internal successors, (715), 5 states have internal predecessors, (715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:21:24,672 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 143.0) internal successors, (715), 5 states have internal predecessors, (715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:21:24,673 INFO L175 Difference]: Start difference. First operand has 51 places, 35 transitions, 319 flow. Second operand 4 states and 330 transitions. [2023-08-30 23:21:24,673 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 62 transitions, 623 flow [2023-08-30 23:21:24,676 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 62 transitions, 570 flow, removed 1 selfloop flow, removed 5 redundant places. [2023-08-30 23:21:24,676 INFO L231 Difference]: Finished difference. Result has 49 places, 23 transitions, 149 flow [2023-08-30 23:21:24,676 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=143, PETRI_DIFFERENCE_MINUEND_FLOW=279, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=149, PETRI_PLACES=49, PETRI_TRANSITIONS=23} [2023-08-30 23:21:24,677 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 22 predicate places. [2023-08-30 23:21:24,677 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 23 transitions, 149 flow [2023-08-30 23:21:24,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 78.75) internal successors, (315), 4 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:21:24,677 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 23:21:24,677 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 23:21:24,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-30 23:21:24,677 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 23:21:24,677 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 23:21:24,677 INFO L85 PathProgramCache]: Analyzing trace with hash 1441889324, now seen corresponding path program 3 times [2023-08-30 23:21:24,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 23:21:24,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246729665] [2023-08-30 23:21:24,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 23:21:24,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 23:21:24,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 23:21:24,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 23:21:24,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 23:21:24,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246729665] [2023-08-30 23:21:24,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246729665] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 23:21:24,763 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 23:21:24,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 23:21:24,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778267178] [2023-08-30 23:21:24,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 23:21:24,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 23:21:24,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 23:21:24,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 23:21:24,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 23:21:24,772 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 143 [2023-08-30 23:21:24,772 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 23 transitions, 149 flow. Second operand has 4 states, 4 states have (on average 77.75) internal successors, (311), 4 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:21:24,772 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 23:21:24,772 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 143 [2023-08-30 23:21:24,772 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 23:21:24,793 INFO L130 PetriNetUnfolder]: 29/76 cut-off events. [2023-08-30 23:21:24,793 INFO L131 PetriNetUnfolder]: For 239/239 co-relation queries the response was YES. [2023-08-30 23:21:24,793 INFO L83 FinitePrefix]: Finished finitePrefix Result has 349 conditions, 76 events. 29/76 cut-off events. For 239/239 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 177 event pairs, 6 based on Foata normal form. 1/77 useless extension candidates. Maximal degree in co-relation 333. Up to 47 conditions per place. [2023-08-30 23:21:24,793 INFO L137 encePairwiseOnDemand]: 140/143 looper letters, 0 selfloop transitions, 0 changer transitions 29/29 dead transitions. [2023-08-30 23:21:24,793 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 29 transitions, 232 flow [2023-08-30 23:21:24,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 23:21:24,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 23:21:24,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 316 transitions. [2023-08-30 23:21:24,794 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5524475524475524 [2023-08-30 23:21:24,794 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 316 transitions. [2023-08-30 23:21:24,794 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 316 transitions. [2023-08-30 23:21:24,795 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 23:21:24,795 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 316 transitions. [2023-08-30 23:21:24,795 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 79.0) internal successors, (316), 4 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:21:24,796 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 143.0) internal successors, (715), 5 states have internal predecessors, (715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:21:24,796 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 143.0) internal successors, (715), 5 states have internal predecessors, (715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:21:24,796 INFO L175 Difference]: Start difference. First operand has 49 places, 23 transitions, 149 flow. Second operand 4 states and 316 transitions. [2023-08-30 23:21:24,796 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 29 transitions, 232 flow [2023-08-30 23:21:24,797 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 29 transitions, 192 flow, removed 3 selfloop flow, removed 12 redundant places. [2023-08-30 23:21:24,797 INFO L231 Difference]: Finished difference. Result has 38 places, 0 transitions, 0 flow [2023-08-30 23:21:24,797 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=143, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=38, PETRI_TRANSITIONS=0} [2023-08-30 23:21:24,797 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 11 predicate places. [2023-08-30 23:21:24,797 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 0 transitions, 0 flow [2023-08-30 23:21:24,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 77.75) internal successors, (311), 4 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 23:21:24,799 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 4 remaining) [2023-08-30 23:21:24,799 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 4 remaining) [2023-08-30 23:21:24,799 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2023-08-30 23:21:24,800 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2023-08-30 23:21:24,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-30 23:21:24,800 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 23:21:24,801 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-30 23:21:24,802 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-30 23:21:24,803 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.08 11:21:24 BasicIcfg [2023-08-30 23:21:24,803 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-30 23:21:24,804 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-08-30 23:21:24,804 INFO L271 PluginConnector]: Initializing Witness Printer... [2023-08-30 23:21:24,804 INFO L275 PluginConnector]: Witness Printer initialized [2023-08-30 23:21:24,804 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 11:21:20" (3/4) ... [2023-08-30 23:21:24,806 INFO L137 WitnessPrinter]: Generating witness for correct program [2023-08-30 23:21:24,809 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure P0 [2023-08-30 23:21:24,809 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure P1 [2023-08-30 23:21:24,809 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure P2 [2023-08-30 23:21:24,812 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 17 nodes and edges [2023-08-30 23:21:24,812 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2023-08-30 23:21:24,812 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2023-08-30 23:21:24,812 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2023-08-30 23:21:24,829 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2023-08-30 23:21:24,829 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-08-30 23:21:24,829 INFO L158 Benchmark]: Toolchain (without parser) took 4864.43ms. Allocated memory was 73.4MB in the beginning and 159.4MB in the end (delta: 86.0MB). Free memory was 49.0MB in the beginning and 77.8MB in the end (delta: -28.7MB). Peak memory consumption was 55.3MB. Max. memory is 16.1GB. [2023-08-30 23:21:24,830 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 73.4MB. Free memory is still 50.7MB. There was no memory consumed. Max. memory is 16.1GB. [2023-08-30 23:21:24,830 INFO L158 Benchmark]: CACSL2BoogieTranslator took 370.28ms. Allocated memory was 73.4MB in the beginning and 90.2MB in the end (delta: 16.8MB). Free memory was 48.9MB in the beginning and 65.6MB in the end (delta: -16.8MB). Peak memory consumption was 19.7MB. Max. memory is 16.1GB. [2023-08-30 23:21:24,830 INFO L158 Benchmark]: Boogie Procedure Inliner took 25.34ms. Allocated memory is still 90.2MB. Free memory was 65.6MB in the beginning and 63.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-08-30 23:21:24,830 INFO L158 Benchmark]: Boogie Preprocessor took 15.29ms. Allocated memory is still 90.2MB. Free memory was 63.5MB in the beginning and 62.1MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-08-30 23:21:24,830 INFO L158 Benchmark]: RCFGBuilder took 291.67ms. Allocated memory is still 90.2MB. Free memory was 62.1MB in the beginning and 48.6MB in the end (delta: 13.5MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2023-08-30 23:21:24,831 INFO L158 Benchmark]: TraceAbstraction took 4132.47ms. Allocated memory was 90.2MB in the beginning and 159.4MB in the end (delta: 69.2MB). Free memory was 48.1MB in the beginning and 80.9MB in the end (delta: -32.8MB). Peak memory consumption was 35.6MB. Max. memory is 16.1GB. [2023-08-30 23:21:24,831 INFO L158 Benchmark]: Witness Printer took 25.57ms. Allocated memory is still 159.4MB. Free memory was 80.9MB in the beginning and 77.8MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-08-30 23:21:24,832 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 73.4MB. Free memory is still 50.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 370.28ms. Allocated memory was 73.4MB in the beginning and 90.2MB in the end (delta: 16.8MB). Free memory was 48.9MB in the beginning and 65.6MB in the end (delta: -16.8MB). Peak memory consumption was 19.7MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 25.34ms. Allocated memory is still 90.2MB. Free memory was 65.6MB in the beginning and 63.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 15.29ms. Allocated memory is still 90.2MB. Free memory was 63.5MB in the beginning and 62.1MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 291.67ms. Allocated memory is still 90.2MB. Free memory was 62.1MB in the beginning and 48.6MB in the end (delta: 13.5MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 4132.47ms. Allocated memory was 90.2MB in the beginning and 159.4MB in the end (delta: 69.2MB). Free memory was 48.1MB in the beginning and 80.9MB in the end (delta: -32.8MB). Peak memory consumption was 35.6MB. Max. memory is 16.1GB. * Witness Printer took 25.57ms. Allocated memory is still 159.4MB. Free memory was 80.9MB in the beginning and 77.8MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 1.6s, 79 PlacesBefore, 27 PlacesAfterwards, 70 TransitionsBefore, 18 TransitionsAfterwards, 1044 CoEnabledTransitionPairs, 5 FixpointIterations, 20 TrivialSequentialCompositions, 33 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 5 ConcurrentYvCompositions, 0 ChoiceCompositions, 58 TotalNumberOfCompositions, 2098 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1215, independent: 1131, independent conditional: 0, independent unconditional: 1131, dependent: 84, dependent conditional: 0, dependent unconditional: 84, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 587, independent: 565, independent conditional: 0, independent unconditional: 565, dependent: 22, dependent conditional: 0, dependent unconditional: 22, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 1215, independent: 566, independent conditional: 0, independent unconditional: 566, dependent: 62, dependent conditional: 0, dependent unconditional: 62, unknown: 587, unknown conditional: 0, unknown unconditional: 587] , Statistics on independence cache: Total cache size (in pairs): 49, Positive cache size: 41, Positive conditional cache size: 0, Positive unconditional cache size: 41, Negative cache size: 8, Negative conditional cache size: 0, Negative unconditional cache size: 8, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - PositiveResult [Line: 18]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 108 locations, 4 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 4.0s, OverallIterations: 10, TraceHistogramMax: 1, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 0.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.7s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 237 SdHoareTripleChecker+Valid, 0.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 153 mSDsluCounter, 63 SdHoareTripleChecker+Invalid, 0.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 25 mSDsCounter, 50 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 533 IncrementalHoareTripleChecker+Invalid, 583 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 50 mSolverCounterUnsat, 38 mSDtfsCounter, 533 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 30 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=329occurred in iteration=6, InterpolantAutomatonStates: 41, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.1s InterpolantComputationTime, 125 NumberOfCodeBlocks, 125 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 115 ConstructedInterpolants, 0 QuantifiedInterpolants, 489 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 10 InterpolantComputations, 10 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-08-30 23:21:24,844 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE