./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe018_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 AFTER --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/safe018_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 e136f4ab00a1c93eb400bb9f2a21b2887cfec20e18dff1c5960bc25f16f1bcad --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 16:57:13,559 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 16:57:13,561 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 16:57:13,594 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 16:57:13,595 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 16:57:13,597 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 16:57:13,598 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 16:57:13,600 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 16:57:13,601 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 16:57:13,604 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 16:57:13,605 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 16:57:13,607 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 16:57:13,607 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 16:57:13,608 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 16:57:13,609 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 16:57:13,613 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 16:57:13,614 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 16:57:13,614 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 16:57:13,615 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 16:57:13,619 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 16:57:13,626 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 16:57:13,627 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 16:57:13,628 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 16:57:13,629 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 16:57:13,634 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 16:57:13,634 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 16:57:13,634 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 16:57:13,635 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 16:57:13,636 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 16:57:13,637 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 16:57:13,637 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 16:57:13,637 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 16:57:13,639 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 16:57:13,639 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 16:57:13,640 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 16:57:13,640 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 16:57:13,640 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 16:57:13,641 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 16:57:13,641 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 16:57:13,641 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 16:57:13,642 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 16:57:13,643 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-30 16:57:13,667 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 16:57:13,668 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 16:57:13,668 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 16:57:13,668 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 16:57:13,669 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 16:57:13,669 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 16:57:13,670 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 16:57:13,670 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 16:57:13,670 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 16:57:13,670 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 16:57:13,671 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 16:57:13,671 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 16:57:13,671 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 16:57:13,671 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 16:57:13,671 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-30 16:57:13,671 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 16:57:13,672 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-30 16:57:13,672 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 16:57:13,672 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-30 16:57:13,672 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 16:57:13,672 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-30 16:57:13,672 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 16:57:13,672 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 16:57:13,673 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 16:57:13,673 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 16:57:13,673 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 16:57:13,673 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 16:57:13,673 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-30 16:57:13,673 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 16:57:13,674 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 16:57:13,674 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 16:57:13,674 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-30 16:57:13,674 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 16:57:13,674 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 16:57:13,674 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 16:57:13,674 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e136f4ab00a1c93eb400bb9f2a21b2887cfec20e18dff1c5960bc25f16f1bcad Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 16:57:13,911 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 16:57:13,923 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 16:57:13,924 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 16:57:13,925 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 16:57:13,925 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 16:57:13,926 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe018_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2023-08-30 16:57:14,750 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 16:57:14,964 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 16:57:14,965 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe018_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2023-08-30 16:57:14,981 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/caf663742/3b9244b628764379890710952f107157/FLAG8f43ec829 [2023-08-30 16:57:14,990 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/caf663742/3b9244b628764379890710952f107157 [2023-08-30 16:57:14,992 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 16:57:14,993 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 16:57:14,994 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 16:57:14,994 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 16:57:14,996 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 16:57:14,996 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 04:57:14" (1/1) ... [2023-08-30 16:57:14,997 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7192ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:57:14, skipping insertion in model container [2023-08-30 16:57:14,997 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 04:57:14" (1/1) ... [2023-08-30 16:57:15,002 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 16:57:15,036 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 16:57:15,133 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/safe018_pso.oepc_pso.opt_tso.oepc_tso.opt.i[975,988] [2023-08-30 16:57:15,250 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 16:57:15,258 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 16:57:15,270 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/safe018_pso.oepc_pso.opt_tso.oepc_tso.opt.i[975,988] [2023-08-30 16:57:15,309 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 16:57:15,339 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 16:57:15,340 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 16:57:15,344 INFO L208 MainTranslator]: Completed translation [2023-08-30 16:57:15,344 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:57:15 WrapperNode [2023-08-30 16:57:15,344 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 16:57:15,345 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 16:57:15,345 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 16:57:15,345 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 16:57:15,350 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:57:15" (1/1) ... [2023-08-30 16:57:15,373 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:57:15" (1/1) ... [2023-08-30 16:57:15,392 INFO L138 Inliner]: procedures = 176, calls = 51, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 71 [2023-08-30 16:57:15,392 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 16:57:15,393 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 16:57:15,393 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 16:57:15,393 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 16:57:15,398 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:57:15" (1/1) ... [2023-08-30 16:57:15,399 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:57:15" (1/1) ... [2023-08-30 16:57:15,407 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:57:15" (1/1) ... [2023-08-30 16:57:15,407 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:57:15" (1/1) ... [2023-08-30 16:57:15,416 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:57:15" (1/1) ... [2023-08-30 16:57:15,421 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:57:15" (1/1) ... [2023-08-30 16:57:15,422 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:57:15" (1/1) ... [2023-08-30 16:57:15,422 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:57:15" (1/1) ... [2023-08-30 16:57:15,424 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 16:57:15,425 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 16:57:15,425 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 16:57:15,425 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 16:57:15,425 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:57:15" (1/1) ... [2023-08-30 16:57:15,434 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 16:57:15,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 16:57:15,455 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 16:57:15,462 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 16:57:15,480 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 16:57:15,480 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-30 16:57:15,481 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 16:57:15,481 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 16:57:15,481 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 16:57:15,481 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2023-08-30 16:57:15,481 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2023-08-30 16:57:15,481 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2023-08-30 16:57:15,481 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2023-08-30 16:57:15,481 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2023-08-30 16:57:15,481 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2023-08-30 16:57:15,482 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 16:57:15,482 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-30 16:57:15,482 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 16:57:15,482 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 16:57:15,483 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 16:57:15,577 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 16:57:15,578 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 16:57:15,712 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 16:57:15,716 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 16:57:15,717 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-08-30 16:57:15,718 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 04:57:15 BoogieIcfgContainer [2023-08-30 16:57:15,718 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 16:57:15,725 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 16:57:15,725 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 16:57:15,727 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 16:57:15,728 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 04:57:14" (1/3) ... [2023-08-30 16:57:15,728 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b30daa3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 04:57:15, skipping insertion in model container [2023-08-30 16:57:15,728 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:57:15" (2/3) ... [2023-08-30 16:57:15,728 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b30daa3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 04:57:15, skipping insertion in model container [2023-08-30 16:57:15,729 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 04:57:15" (3/3) ... [2023-08-30 16:57:15,729 INFO L112 eAbstractionObserver]: Analyzing ICFG safe018_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2023-08-30 16:57:15,734 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-30 16:57:15,740 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 16:57:15,742 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-30 16:57:15,742 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 16:57:15,780 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-30 16:57:15,800 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 92 places, 84 transitions, 183 flow [2023-08-30 16:57:15,826 INFO L130 PetriNetUnfolder]: 2/81 cut-off events. [2023-08-30 16:57:15,826 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 16:57:15,829 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91 conditions, 81 events. 2/81 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 43 event pairs, 0 based on Foata normal form. 0/78 useless extension candidates. Maximal degree in co-relation 63. Up to 2 conditions per place. [2023-08-30 16:57:15,829 INFO L82 GeneralOperation]: Start removeDead. Operand has 92 places, 84 transitions, 183 flow [2023-08-30 16:57:15,831 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 78 places, 69 transitions, 147 flow [2023-08-30 16:57:15,833 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 16:57:15,839 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 78 places, 69 transitions, 147 flow [2023-08-30 16:57:15,841 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 78 places, 69 transitions, 147 flow [2023-08-30 16:57:15,841 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 78 places, 69 transitions, 147 flow [2023-08-30 16:57:15,853 INFO L130 PetriNetUnfolder]: 1/69 cut-off events. [2023-08-30 16:57:15,854 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 16:57:15,854 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79 conditions, 69 events. 1/69 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 34 event pairs, 0 based on Foata normal form. 0/68 useless extension candidates. Maximal degree in co-relation 51. Up to 2 conditions per place. [2023-08-30 16:57:15,855 INFO L119 LiptonReduction]: Number of co-enabled transitions 974 [2023-08-30 16:57:17,489 INFO L134 LiptonReduction]: Checked pairs total: 1620 [2023-08-30 16:57:17,490 INFO L136 LiptonReduction]: Total number of compositions: 56 [2023-08-30 16:57:17,505 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 16:57:17,509 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;@60eba453, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 16:57:17,509 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-30 16:57:17,513 INFO L130 PetriNetUnfolder]: 0/14 cut-off events. [2023-08-30 16:57:17,513 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 16:57:17,513 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:57:17,513 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:57:17,514 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 16:57:17,517 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:57:17,517 INFO L85 PathProgramCache]: Analyzing trace with hash -1744931790, now seen corresponding path program 1 times [2023-08-30 16:57:17,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:57:17,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740891156] [2023-08-30 16:57:17,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:57:17,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:57:17,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:57:17,907 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 16:57:17,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:57:17,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740891156] [2023-08-30 16:57:17,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740891156] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:57:17,909 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:57:17,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 16:57:17,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688369451] [2023-08-30 16:57:17,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:57:17,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 16:57:17,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:57:17,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 16:57:17,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 16:57:17,944 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 140 [2023-08-30 16:57:17,946 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 16 transitions, 41 flow. Second operand has 3 states, 3 states have (on average 74.66666666666667) internal successors, (224), 3 states have internal predecessors, (224), 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 16:57:17,946 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:57:17,946 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 140 [2023-08-30 16:57:17,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:57:18,031 INFO L130 PetriNetUnfolder]: 222/384 cut-off events. [2023-08-30 16:57:18,032 INFO L131 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2023-08-30 16:57:18,034 INFO L83 FinitePrefix]: Finished finitePrefix Result has 783 conditions, 384 events. 222/384 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1491 event pairs, 69 based on Foata normal form. 3/387 useless extension candidates. Maximal degree in co-relation 772. Up to 340 conditions per place. [2023-08-30 16:57:18,037 INFO L137 encePairwiseOnDemand]: 136/140 looper letters, 21 selfloop transitions, 3 changer transitions 0/25 dead transitions. [2023-08-30 16:57:18,037 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 25 transitions, 113 flow [2023-08-30 16:57:18,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 16:57:18,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 16:57:18,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 241 transitions. [2023-08-30 16:57:18,048 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5738095238095238 [2023-08-30 16:57:18,049 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 241 transitions. [2023-08-30 16:57:18,049 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 241 transitions. [2023-08-30 16:57:18,050 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:57:18,052 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 241 transitions. [2023-08-30 16:57:18,055 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 80.33333333333333) internal successors, (241), 3 states have internal predecessors, (241), 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 16:57:18,059 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 140.0) internal successors, (560), 4 states have internal predecessors, (560), 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 16:57:18,060 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 140.0) internal successors, (560), 4 states have internal predecessors, (560), 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 16:57:18,061 INFO L175 Difference]: Start difference. First operand has 26 places, 16 transitions, 41 flow. Second operand 3 states and 241 transitions. [2023-08-30 16:57:18,061 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 25 transitions, 113 flow [2023-08-30 16:57:18,064 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 25 transitions, 108 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-30 16:57:18,066 INFO L231 Difference]: Finished difference. Result has 26 places, 18 transitions, 57 flow [2023-08-30 16:57:18,067 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=140, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=57, PETRI_PLACES=26, PETRI_TRANSITIONS=18} [2023-08-30 16:57:18,070 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 0 predicate places. [2023-08-30 16:57:18,070 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 18 transitions, 57 flow [2023-08-30 16:57:18,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 74.66666666666667) internal successors, (224), 3 states have internal predecessors, (224), 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 16:57:18,070 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:57:18,071 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:57:18,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 16:57:18,074 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 16:57:18,074 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:57:18,074 INFO L85 PathProgramCache]: Analyzing trace with hash 1741688772, now seen corresponding path program 1 times [2023-08-30 16:57:18,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:57:18,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308193692] [2023-08-30 16:57:18,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:57:18,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:57:18,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:57:18,210 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 16:57:18,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:57:18,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308193692] [2023-08-30 16:57:18,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308193692] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:57:18,211 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:57:18,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 16:57:18,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348230999] [2023-08-30 16:57:18,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:57:18,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 16:57:18,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:57:18,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 16:57:18,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 16:57:18,221 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 140 [2023-08-30 16:57:18,221 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 18 transitions, 57 flow. Second operand has 4 states, 4 states have (on average 74.25) internal successors, (297), 4 states have internal predecessors, (297), 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 16:57:18,221 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:57:18,221 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 140 [2023-08-30 16:57:18,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:57:18,272 INFO L130 PetriNetUnfolder]: 201/354 cut-off events. [2023-08-30 16:57:18,272 INFO L131 PetriNetUnfolder]: For 43/43 co-relation queries the response was YES. [2023-08-30 16:57:18,274 INFO L83 FinitePrefix]: Finished finitePrefix Result has 823 conditions, 354 events. 201/354 cut-off events. For 43/43 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1295 event pairs, 75 based on Foata normal form. 9/363 useless extension candidates. Maximal degree in co-relation 812. Up to 211 conditions per place. [2023-08-30 16:57:18,275 INFO L137 encePairwiseOnDemand]: 137/140 looper letters, 19 selfloop transitions, 3 changer transitions 0/23 dead transitions. [2023-08-30 16:57:18,275 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 23 transitions, 111 flow [2023-08-30 16:57:18,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 16:57:18,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 16:57:18,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 238 transitions. [2023-08-30 16:57:18,279 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5666666666666667 [2023-08-30 16:57:18,279 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 238 transitions. [2023-08-30 16:57:18,279 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 238 transitions. [2023-08-30 16:57:18,279 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:57:18,279 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 238 transitions. [2023-08-30 16:57:18,280 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 79.33333333333333) internal successors, (238), 3 states have internal predecessors, (238), 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 16:57:18,282 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 140.0) internal successors, (560), 4 states have internal predecessors, (560), 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 16:57:18,282 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 140.0) internal successors, (560), 4 states have internal predecessors, (560), 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 16:57:18,282 INFO L175 Difference]: Start difference. First operand has 26 places, 18 transitions, 57 flow. Second operand 3 states and 238 transitions. [2023-08-30 16:57:18,282 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 23 transitions, 111 flow [2023-08-30 16:57:18,283 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 23 transitions, 108 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 16:57:18,283 INFO L231 Difference]: Finished difference. Result has 28 places, 18 transitions, 65 flow [2023-08-30 16:57:18,284 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=140, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=65, PETRI_PLACES=28, PETRI_TRANSITIONS=18} [2023-08-30 16:57:18,284 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 2 predicate places. [2023-08-30 16:57:18,284 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 18 transitions, 65 flow [2023-08-30 16:57:18,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 74.25) internal successors, (297), 4 states have internal predecessors, (297), 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 16:57:18,284 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:57:18,285 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:57:18,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-30 16:57:18,285 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 16:57:18,287 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:57:18,287 INFO L85 PathProgramCache]: Analyzing trace with hash 1741688090, now seen corresponding path program 1 times [2023-08-30 16:57:18,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:57:18,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793099934] [2023-08-30 16:57:18,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:57:18,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:57:18,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:57:18,436 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 16:57:18,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:57:18,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793099934] [2023-08-30 16:57:18,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793099934] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:57:18,436 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:57:18,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 16:57:18,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575648023] [2023-08-30 16:57:18,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:57:18,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 16:57:18,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:57:18,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 16:57:18,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 16:57:18,443 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 140 [2023-08-30 16:57:18,443 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 18 transitions, 65 flow. Second operand has 3 states, 3 states have (on average 79.0) internal successors, (237), 3 states have internal predecessors, (237), 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 16:57:18,443 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:57:18,444 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 140 [2023-08-30 16:57:18,444 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:57:18,484 INFO L130 PetriNetUnfolder]: 130/253 cut-off events. [2023-08-30 16:57:18,484 INFO L131 PetriNetUnfolder]: For 82/82 co-relation queries the response was YES. [2023-08-30 16:57:18,485 INFO L83 FinitePrefix]: Finished finitePrefix Result has 611 conditions, 253 events. 130/253 cut-off events. For 82/82 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 990 event pairs, 44 based on Foata normal form. 6/259 useless extension candidates. Maximal degree in co-relation 598. Up to 175 conditions per place. [2023-08-30 16:57:18,486 INFO L137 encePairwiseOnDemand]: 137/140 looper letters, 21 selfloop transitions, 3 changer transitions 0/26 dead transitions. [2023-08-30 16:57:18,486 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 26 transitions, 133 flow [2023-08-30 16:57:18,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 16:57:18,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 16:57:18,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 252 transitions. [2023-08-30 16:57:18,487 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2023-08-30 16:57:18,487 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 252 transitions. [2023-08-30 16:57:18,487 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 252 transitions. [2023-08-30 16:57:18,487 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:57:18,487 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 252 transitions. [2023-08-30 16:57:18,487 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 84.0) internal successors, (252), 3 states have internal predecessors, (252), 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 16:57:18,489 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 140.0) internal successors, (560), 4 states have internal predecessors, (560), 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 16:57:18,489 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 140.0) internal successors, (560), 4 states have internal predecessors, (560), 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 16:57:18,489 INFO L175 Difference]: Start difference. First operand has 28 places, 18 transitions, 65 flow. Second operand 3 states and 252 transitions. [2023-08-30 16:57:18,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 26 transitions, 133 flow [2023-08-30 16:57:18,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 26 transitions, 127 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 16:57:18,490 INFO L231 Difference]: Finished difference. Result has 29 places, 18 transitions, 70 flow [2023-08-30 16:57:18,491 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=140, PETRI_DIFFERENCE_MINUEND_FLOW=59, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=70, PETRI_PLACES=29, PETRI_TRANSITIONS=18} [2023-08-30 16:57:18,491 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 3 predicate places. [2023-08-30 16:57:18,493 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 18 transitions, 70 flow [2023-08-30 16:57:18,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 79.0) internal successors, (237), 3 states have internal predecessors, (237), 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 16:57:18,494 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:57:18,494 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:57:18,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-30 16:57:18,494 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 16:57:18,494 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:57:18,495 INFO L85 PathProgramCache]: Analyzing trace with hash -1842224184, now seen corresponding path program 1 times [2023-08-30 16:57:18,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:57:18,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196010572] [2023-08-30 16:57:18,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:57:18,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:57:18,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:57:18,582 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 16:57:18,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:57:18,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196010572] [2023-08-30 16:57:18,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196010572] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:57:18,582 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:57:18,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 16:57:18,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004663319] [2023-08-30 16:57:18,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:57:18,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 16:57:18,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:57:18,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 16:57:18,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 16:57:18,596 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 140 [2023-08-30 16:57:18,596 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 18 transitions, 70 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 16:57:18,596 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:57:18,596 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 140 [2023-08-30 16:57:18,597 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:57:18,666 INFO L130 PetriNetUnfolder]: 248/436 cut-off events. [2023-08-30 16:57:18,666 INFO L131 PetriNetUnfolder]: For 272/272 co-relation queries the response was YES. [2023-08-30 16:57:18,667 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1097 conditions, 436 events. 248/436 cut-off events. For 272/272 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 1881 event pairs, 39 based on Foata normal form. 18/451 useless extension candidates. Maximal degree in co-relation 1083. Up to 221 conditions per place. [2023-08-30 16:57:18,669 INFO L137 encePairwiseOnDemand]: 134/140 looper letters, 32 selfloop transitions, 11 changer transitions 2/46 dead transitions. [2023-08-30 16:57:18,669 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 46 transitions, 251 flow [2023-08-30 16:57:18,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 16:57:18,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 16:57:18,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 395 transitions. [2023-08-30 16:57:18,673 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5642857142857143 [2023-08-30 16:57:18,673 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 395 transitions. [2023-08-30 16:57:18,673 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 395 transitions. [2023-08-30 16:57:18,673 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:57:18,673 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 395 transitions. [2023-08-30 16:57:18,674 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 79.0) internal successors, (395), 5 states have internal predecessors, (395), 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 16:57:18,675 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 140.0) internal successors, (840), 6 states have internal predecessors, (840), 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 16:57:18,675 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 140.0) internal successors, (840), 6 states have internal predecessors, (840), 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 16:57:18,675 INFO L175 Difference]: Start difference. First operand has 29 places, 18 transitions, 70 flow. Second operand 5 states and 395 transitions. [2023-08-30 16:57:18,675 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 46 transitions, 251 flow [2023-08-30 16:57:18,676 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 46 transitions, 239 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 16:57:18,677 INFO L231 Difference]: Finished difference. Result has 34 places, 26 transitions, 147 flow [2023-08-30 16:57:18,677 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=140, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=147, PETRI_PLACES=34, PETRI_TRANSITIONS=26} [2023-08-30 16:57:18,678 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 8 predicate places. [2023-08-30 16:57:18,678 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 26 transitions, 147 flow [2023-08-30 16:57:18,678 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 16:57:18,678 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:57:18,678 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:57:18,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-30 16:57:18,679 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 16:57:18,679 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:57:18,679 INFO L85 PathProgramCache]: Analyzing trace with hash -1842244644, now seen corresponding path program 2 times [2023-08-30 16:57:18,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:57:18,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479479388] [2023-08-30 16:57:18,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:57:18,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:57:18,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:57:18,794 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 16:57:18,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:57:18,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479479388] [2023-08-30 16:57:18,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479479388] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:57:18,795 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:57:18,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 16:57:18,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270987414] [2023-08-30 16:57:18,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:57:18,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 16:57:18,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:57:18,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 16:57:18,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 16:57:18,806 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 140 [2023-08-30 16:57:18,807 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 26 transitions, 147 flow. Second operand has 5 states, 5 states have (on average 72.0) internal successors, (360), 5 states have internal predecessors, (360), 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 16:57:18,807 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:57:18,807 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 140 [2023-08-30 16:57:18,807 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:57:18,871 INFO L130 PetriNetUnfolder]: 263/472 cut-off events. [2023-08-30 16:57:18,871 INFO L131 PetriNetUnfolder]: For 621/621 co-relation queries the response was YES. [2023-08-30 16:57:18,872 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1423 conditions, 472 events. 263/472 cut-off events. For 621/621 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 2095 event pairs, 77 based on Foata normal form. 18/488 useless extension candidates. Maximal degree in co-relation 1406. Up to 232 conditions per place. [2023-08-30 16:57:18,873 INFO L137 encePairwiseOnDemand]: 136/140 looper letters, 23 selfloop transitions, 5 changer transitions 8/37 dead transitions. [2023-08-30 16:57:18,873 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 37 transitions, 251 flow [2023-08-30 16:57:18,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 16:57:18,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 16:57:18,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 311 transitions. [2023-08-30 16:57:18,874 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5553571428571429 [2023-08-30 16:57:18,874 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 311 transitions. [2023-08-30 16:57:18,874 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 311 transitions. [2023-08-30 16:57:18,874 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:57:18,874 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 311 transitions. [2023-08-30 16:57:18,875 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 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 16:57:18,875 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 140.0) internal successors, (700), 5 states have internal predecessors, (700), 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 16:57:18,876 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 140.0) internal successors, (700), 5 states have internal predecessors, (700), 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 16:57:18,876 INFO L175 Difference]: Start difference. First operand has 34 places, 26 transitions, 147 flow. Second operand 4 states and 311 transitions. [2023-08-30 16:57:18,876 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 37 transitions, 251 flow [2023-08-30 16:57:18,879 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 37 transitions, 249 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-08-30 16:57:18,879 INFO L231 Difference]: Finished difference. Result has 39 places, 20 transitions, 124 flow [2023-08-30 16:57:18,879 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=140, PETRI_DIFFERENCE_MINUEND_FLOW=145, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=124, PETRI_PLACES=39, PETRI_TRANSITIONS=20} [2023-08-30 16:57:18,881 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 13 predicate places. [2023-08-30 16:57:18,881 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 20 transitions, 124 flow [2023-08-30 16:57:18,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 72.0) internal successors, (360), 5 states have internal predecessors, (360), 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 16:57:18,881 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:57:18,882 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:57:18,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-30 16:57:18,882 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 16:57:18,882 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:57:18,882 INFO L85 PathProgramCache]: Analyzing trace with hash 356602977, now seen corresponding path program 1 times [2023-08-30 16:57:18,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:57:18,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643466546] [2023-08-30 16:57:18,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:57:18,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:57:18,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:57:18,989 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 16:57:18,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:57:18,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643466546] [2023-08-30 16:57:18,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643466546] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:57:18,990 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:57:18,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 16:57:18,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92034356] [2023-08-30 16:57:18,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:57:18,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 16:57:18,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:57:18,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 16:57:18,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 16:57:19,012 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 140 [2023-08-30 16:57:19,012 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 20 transitions, 124 flow. Second operand has 5 states, 5 states have (on average 72.2) internal successors, (361), 5 states have internal predecessors, (361), 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 16:57:19,012 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:57:19,012 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 140 [2023-08-30 16:57:19,012 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:57:19,059 INFO L130 PetriNetUnfolder]: 195/336 cut-off events. [2023-08-30 16:57:19,059 INFO L131 PetriNetUnfolder]: For 974/974 co-relation queries the response was YES. [2023-08-30 16:57:19,060 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1121 conditions, 336 events. 195/336 cut-off events. For 974/974 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 1075 event pairs, 87 based on Foata normal form. 18/354 useless extension candidates. Maximal degree in co-relation 1100. Up to 164 conditions per place. [2023-08-30 16:57:19,060 INFO L137 encePairwiseOnDemand]: 136/140 looper letters, 18 selfloop transitions, 3 changer transitions 9/30 dead transitions. [2023-08-30 16:57:19,060 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 30 transitions, 217 flow [2023-08-30 16:57:19,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 16:57:19,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 16:57:19,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 308 transitions. [2023-08-30 16:57:19,061 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.55 [2023-08-30 16:57:19,062 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 308 transitions. [2023-08-30 16:57:19,062 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 308 transitions. [2023-08-30 16:57:19,062 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:57:19,062 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 308 transitions. [2023-08-30 16:57:19,063 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 77.0) internal successors, (308), 4 states have internal predecessors, (308), 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 16:57:19,064 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 140.0) internal successors, (700), 5 states have internal predecessors, (700), 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 16:57:19,064 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 140.0) internal successors, (700), 5 states have internal predecessors, (700), 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 16:57:19,064 INFO L175 Difference]: Start difference. First operand has 39 places, 20 transitions, 124 flow. Second operand 4 states and 308 transitions. [2023-08-30 16:57:19,064 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 30 transitions, 217 flow [2023-08-30 16:57:19,067 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 30 transitions, 192 flow, removed 3 selfloop flow, removed 6 redundant places. [2023-08-30 16:57:19,067 INFO L231 Difference]: Finished difference. Result has 38 places, 16 transitions, 88 flow [2023-08-30 16:57:19,068 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=140, PETRI_DIFFERENCE_MINUEND_FLOW=99, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=88, PETRI_PLACES=38, PETRI_TRANSITIONS=16} [2023-08-30 16:57:19,070 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 12 predicate places. [2023-08-30 16:57:19,070 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 16 transitions, 88 flow [2023-08-30 16:57:19,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 72.2) internal successors, (361), 5 states have internal predecessors, (361), 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 16:57:19,070 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:57:19,070 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:57:19,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-30 16:57:19,070 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 16:57:19,071 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:57:19,071 INFO L85 PathProgramCache]: Analyzing trace with hash -439876128, now seen corresponding path program 1 times [2023-08-30 16:57:19,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:57:19,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670762649] [2023-08-30 16:57:19,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:57:19,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:57:19,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:57:19,175 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 16:57:19,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:57:19,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670762649] [2023-08-30 16:57:19,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670762649] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:57:19,176 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:57:19,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 16:57:19,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190310952] [2023-08-30 16:57:19,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:57:19,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 16:57:19,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:57:19,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 16:57:19,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 16:57:19,186 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 140 [2023-08-30 16:57:19,186 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 16 transitions, 88 flow. Second operand has 4 states, 4 states have (on average 75.75) internal successors, (303), 4 states have internal predecessors, (303), 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 16:57:19,186 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:57:19,186 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 140 [2023-08-30 16:57:19,186 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:57:19,223 INFO L130 PetriNetUnfolder]: 56/125 cut-off events. [2023-08-30 16:57:19,223 INFO L131 PetriNetUnfolder]: For 595/597 co-relation queries the response was YES. [2023-08-30 16:57:19,223 INFO L83 FinitePrefix]: Finished finitePrefix Result has 442 conditions, 125 events. 56/125 cut-off events. For 595/597 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 384 event pairs, 23 based on Foata normal form. 10/134 useless extension candidates. Maximal degree in co-relation 423. Up to 73 conditions per place. [2023-08-30 16:57:19,224 INFO L137 encePairwiseOnDemand]: 134/140 looper letters, 17 selfloop transitions, 4 changer transitions 12/35 dead transitions. [2023-08-30 16:57:19,224 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 35 transitions, 241 flow [2023-08-30 16:57:19,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 16:57:19,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 16:57:19,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 400 transitions. [2023-08-30 16:57:19,225 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2023-08-30 16:57:19,226 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 400 transitions. [2023-08-30 16:57:19,226 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 400 transitions. [2023-08-30 16:57:19,226 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:57:19,226 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 400 transitions. [2023-08-30 16:57:19,227 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 80.0) internal successors, (400), 5 states have internal predecessors, (400), 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 16:57:19,227 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 140.0) internal successors, (840), 6 states have internal predecessors, (840), 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 16:57:19,228 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 140.0) internal successors, (840), 6 states have internal predecessors, (840), 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 16:57:19,228 INFO L175 Difference]: Start difference. First operand has 38 places, 16 transitions, 88 flow. Second operand 5 states and 400 transitions. [2023-08-30 16:57:19,228 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 35 transitions, 241 flow [2023-08-30 16:57:19,229 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 35 transitions, 174 flow, removed 12 selfloop flow, removed 10 redundant places. [2023-08-30 16:57:19,230 INFO L231 Difference]: Finished difference. Result has 34 places, 19 transitions, 92 flow [2023-08-30 16:57:19,230 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=140, PETRI_DIFFERENCE_MINUEND_FLOW=56, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=92, PETRI_PLACES=34, PETRI_TRANSITIONS=19} [2023-08-30 16:57:19,230 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 8 predicate places. [2023-08-30 16:57:19,231 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 19 transitions, 92 flow [2023-08-30 16:57:19,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 75.75) internal successors, (303), 4 states have internal predecessors, (303), 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 16:57:19,231 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:57:19,231 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:57:19,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-30 16:57:19,232 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 16:57:19,232 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:57:19,233 INFO L85 PathProgramCache]: Analyzing trace with hash 1952189162, now seen corresponding path program 1 times [2023-08-30 16:57:19,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:57:19,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139443120] [2023-08-30 16:57:19,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:57:19,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:57:19,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:57:19,338 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 16:57:19,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:57:19,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139443120] [2023-08-30 16:57:19,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139443120] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:57:19,339 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:57:19,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 16:57:19,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059730148] [2023-08-30 16:57:19,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:57:19,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 16:57:19,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:57:19,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 16:57:19,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 16:57:19,349 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 140 [2023-08-30 16:57:19,349 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 19 transitions, 92 flow. Second operand has 5 states, 5 states have (on average 75.4) internal successors, (377), 5 states have internal predecessors, (377), 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 16:57:19,349 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:57:19,349 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 140 [2023-08-30 16:57:19,350 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:57:19,407 INFO L130 PetriNetUnfolder]: 32/81 cut-off events. [2023-08-30 16:57:19,407 INFO L131 PetriNetUnfolder]: For 229/252 co-relation queries the response was YES. [2023-08-30 16:57:19,407 INFO L83 FinitePrefix]: Finished finitePrefix Result has 310 conditions, 81 events. 32/81 cut-off events. For 229/252 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 214 event pairs, 5 based on Foata normal form. 14/94 useless extension candidates. Maximal degree in co-relation 295. Up to 48 conditions per place. [2023-08-30 16:57:19,407 INFO L137 encePairwiseOnDemand]: 134/140 looper letters, 18 selfloop transitions, 7 changer transitions 10/37 dead transitions. [2023-08-30 16:57:19,407 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 37 transitions, 246 flow [2023-08-30 16:57:19,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 16:57:19,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 16:57:19,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 475 transitions. [2023-08-30 16:57:19,409 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5654761904761905 [2023-08-30 16:57:19,409 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 475 transitions. [2023-08-30 16:57:19,409 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 475 transitions. [2023-08-30 16:57:19,409 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:57:19,409 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 475 transitions. [2023-08-30 16:57:19,410 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 79.16666666666667) internal successors, (475), 6 states have internal predecessors, (475), 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 16:57:19,410 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 140.0) internal successors, (980), 7 states have internal predecessors, (980), 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 16:57:19,411 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 140.0) internal successors, (980), 7 states have internal predecessors, (980), 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 16:57:19,411 INFO L175 Difference]: Start difference. First operand has 34 places, 19 transitions, 92 flow. Second operand 6 states and 475 transitions. [2023-08-30 16:57:19,411 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 37 transitions, 246 flow [2023-08-30 16:57:19,411 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 37 transitions, 240 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-30 16:57:19,412 INFO L231 Difference]: Finished difference. Result has 38 places, 22 transitions, 142 flow [2023-08-30 16:57:19,412 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=140, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=142, PETRI_PLACES=38, PETRI_TRANSITIONS=22} [2023-08-30 16:57:19,412 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 12 predicate places. [2023-08-30 16:57:19,412 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 22 transitions, 142 flow [2023-08-30 16:57:19,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 75.4) internal successors, (377), 5 states have internal predecessors, (377), 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 16:57:19,413 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:57:19,413 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:57:19,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-30 16:57:19,413 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 16:57:19,413 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:57:19,413 INFO L85 PathProgramCache]: Analyzing trace with hash 387879697, now seen corresponding path program 1 times [2023-08-30 16:57:19,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:57:19,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877283271] [2023-08-30 16:57:19,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:57:19,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:57:19,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:57:19,514 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 16:57:19,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:57:19,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877283271] [2023-08-30 16:57:19,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877283271] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:57:19,514 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:57:19,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 16:57:19,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553202074] [2023-08-30 16:57:19,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:57:19,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 16:57:19,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:57:19,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 16:57:19,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-08-30 16:57:19,528 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 140 [2023-08-30 16:57:19,528 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 22 transitions, 142 flow. Second operand has 6 states, 6 states have (on average 75.16666666666667) internal successors, (451), 6 states have internal predecessors, (451), 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 16:57:19,528 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:57:19,528 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 140 [2023-08-30 16:57:19,529 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:57:19,572 INFO L130 PetriNetUnfolder]: 17/50 cut-off events. [2023-08-30 16:57:19,572 INFO L131 PetriNetUnfolder]: For 173/191 co-relation queries the response was YES. [2023-08-30 16:57:19,572 INFO L83 FinitePrefix]: Finished finitePrefix Result has 224 conditions, 50 events. 17/50 cut-off events. For 173/191 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 86 event pairs, 2 based on Foata normal form. 12/61 useless extension candidates. Maximal degree in co-relation 206. Up to 28 conditions per place. [2023-08-30 16:57:19,573 INFO L137 encePairwiseOnDemand]: 134/140 looper letters, 15 selfloop transitions, 10 changer transitions 5/32 dead transitions. [2023-08-30 16:57:19,573 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 32 transitions, 257 flow [2023-08-30 16:57:19,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 16:57:19,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 16:57:19,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 543 transitions. [2023-08-30 16:57:19,574 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5540816326530612 [2023-08-30 16:57:19,574 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 543 transitions. [2023-08-30 16:57:19,575 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 543 transitions. [2023-08-30 16:57:19,575 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:57:19,575 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 543 transitions. [2023-08-30 16:57:19,576 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 77.57142857142857) internal successors, (543), 7 states have internal predecessors, (543), 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 16:57:19,577 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 140.0) internal successors, (1120), 8 states have internal predecessors, (1120), 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 16:57:19,577 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 140.0) internal successors, (1120), 8 states have internal predecessors, (1120), 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 16:57:19,577 INFO L175 Difference]: Start difference. First operand has 38 places, 22 transitions, 142 flow. Second operand 7 states and 543 transitions. [2023-08-30 16:57:19,577 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 32 transitions, 257 flow [2023-08-30 16:57:19,578 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 32 transitions, 217 flow, removed 16 selfloop flow, removed 4 redundant places. [2023-08-30 16:57:19,578 INFO L231 Difference]: Finished difference. Result has 41 places, 22 transitions, 140 flow [2023-08-30 16:57:19,578 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=140, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=140, PETRI_PLACES=41, PETRI_TRANSITIONS=22} [2023-08-30 16:57:19,579 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 15 predicate places. [2023-08-30 16:57:19,579 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 22 transitions, 140 flow [2023-08-30 16:57:19,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 75.16666666666667) internal successors, (451), 6 states have internal predecessors, (451), 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 16:57:19,579 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:57:19,580 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:57:19,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-30 16:57:19,580 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 16:57:19,580 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:57:19,580 INFO L85 PathProgramCache]: Analyzing trace with hash 807289790, now seen corresponding path program 1 times [2023-08-30 16:57:19,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:57:19,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842861234] [2023-08-30 16:57:19,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:57:19,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:57:19,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:57:19,662 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 16:57:19,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:57:19,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842861234] [2023-08-30 16:57:19,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842861234] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:57:19,663 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:57:19,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 16:57:19,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651350390] [2023-08-30 16:57:19,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:57:19,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 16:57:19,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:57:19,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 16:57:19,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 16:57:19,672 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 140 [2023-08-30 16:57:19,672 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 22 transitions, 140 flow. Second operand has 4 states, 4 states have (on average 73.75) internal successors, (295), 4 states have internal predecessors, (295), 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 16:57:19,672 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:57:19,672 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 140 [2023-08-30 16:57:19,672 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:57:19,695 INFO L130 PetriNetUnfolder]: 18/49 cut-off events. [2023-08-30 16:57:19,695 INFO L131 PetriNetUnfolder]: For 117/117 co-relation queries the response was YES. [2023-08-30 16:57:19,695 INFO L83 FinitePrefix]: Finished finitePrefix Result has 201 conditions, 49 events. 18/49 cut-off events. For 117/117 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 73 event pairs, 3 based on Foata normal form. 1/50 useless extension candidates. Maximal degree in co-relation 189. Up to 27 conditions per place. [2023-08-30 16:57:19,695 INFO L137 encePairwiseOnDemand]: 135/140 looper letters, 0 selfloop transitions, 0 changer transitions 27/27 dead transitions. [2023-08-30 16:57:19,695 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 27 transitions, 214 flow [2023-08-30 16:57:19,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 16:57:19,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 16:57:19,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 369 transitions. [2023-08-30 16:57:19,696 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5271428571428571 [2023-08-30 16:57:19,696 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 369 transitions. [2023-08-30 16:57:19,696 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 369 transitions. [2023-08-30 16:57:19,696 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:57:19,697 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 369 transitions. [2023-08-30 16:57:19,697 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 73.8) internal successors, (369), 5 states have internal predecessors, (369), 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 16:57:19,698 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 140.0) internal successors, (840), 6 states have internal predecessors, (840), 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 16:57:19,698 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 140.0) internal successors, (840), 6 states have internal predecessors, (840), 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 16:57:19,698 INFO L175 Difference]: Start difference. First operand has 41 places, 22 transitions, 140 flow. Second operand 5 states and 369 transitions. [2023-08-30 16:57:19,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 27 transitions, 214 flow [2023-08-30 16:57:19,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 27 transitions, 170 flow, removed 9 selfloop flow, removed 7 redundant places. [2023-08-30 16:57:19,699 INFO L231 Difference]: Finished difference. Result has 35 places, 0 transitions, 0 flow [2023-08-30 16:57:19,699 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=140, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=0, PETRI_PLACES=35, PETRI_TRANSITIONS=0} [2023-08-30 16:57:19,699 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 9 predicate places. [2023-08-30 16:57:19,699 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 0 transitions, 0 flow [2023-08-30 16:57:19,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 73.75) internal successors, (295), 4 states have internal predecessors, (295), 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 16:57:19,701 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 4 remaining) [2023-08-30 16:57:19,701 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 4 remaining) [2023-08-30 16:57:19,701 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2023-08-30 16:57:19,702 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2023-08-30 16:57:19,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-30 16:57:19,702 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:57:19,704 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-30 16:57:19,704 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-30 16:57:19,705 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.08 04:57:19 BasicIcfg [2023-08-30 16:57:19,705 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-30 16:57:19,706 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-08-30 16:57:19,706 INFO L271 PluginConnector]: Initializing Witness Printer... [2023-08-30 16:57:19,706 INFO L275 PluginConnector]: Witness Printer initialized [2023-08-30 16:57:19,706 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 04:57:15" (3/4) ... [2023-08-30 16:57:19,708 INFO L137 WitnessPrinter]: Generating witness for correct program [2023-08-30 16:57:19,711 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure P0 [2023-08-30 16:57:19,711 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure P1 [2023-08-30 16:57:19,711 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure P2 [2023-08-30 16:57:19,714 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 17 nodes and edges [2023-08-30 16:57:19,714 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2023-08-30 16:57:19,714 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2023-08-30 16:57:19,714 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2023-08-30 16:57:19,740 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2023-08-30 16:57:19,740 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-08-30 16:57:19,740 INFO L158 Benchmark]: Toolchain (without parser) took 4748.09ms. Allocated memory was 73.4MB in the beginning and 130.0MB in the end (delta: 56.6MB). Free memory was 49.6MB in the beginning and 105.6MB in the end (delta: -56.0MB). Peak memory consumption was 77.9MB. Max. memory is 16.1GB. [2023-08-30 16:57:19,741 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 58.7MB. Free memory is still 36.6MB. There was no memory consumed. Max. memory is 16.1GB. [2023-08-30 16:57:19,741 INFO L158 Benchmark]: CACSL2BoogieTranslator took 350.91ms. Allocated memory is still 73.4MB. Free memory was 49.4MB in the beginning and 47.2MB in the end (delta: 2.2MB). Peak memory consumption was 21.4MB. Max. memory is 16.1GB. [2023-08-30 16:57:19,741 INFO L158 Benchmark]: Boogie Procedure Inliner took 47.08ms. Allocated memory is still 73.4MB. Free memory was 47.2MB in the beginning and 45.2MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-08-30 16:57:19,741 INFO L158 Benchmark]: Boogie Preprocessor took 31.26ms. Allocated memory is still 73.4MB. Free memory was 45.2MB in the beginning and 43.7MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-08-30 16:57:19,741 INFO L158 Benchmark]: RCFGBuilder took 293.60ms. Allocated memory is still 73.4MB. Free memory was 43.7MB in the beginning and 30.2MB in the end (delta: 13.5MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2023-08-30 16:57:19,741 INFO L158 Benchmark]: TraceAbstraction took 3980.30ms. Allocated memory was 73.4MB in the beginning and 130.0MB in the end (delta: 56.6MB). Free memory was 51.9MB in the beginning and 34.0MB in the end (delta: 17.9MB). Peak memory consumption was 73.9MB. Max. memory is 16.1GB. [2023-08-30 16:57:19,742 INFO L158 Benchmark]: Witness Printer took 34.56ms. Allocated memory is still 130.0MB. Free memory was 34.0MB in the beginning and 105.6MB in the end (delta: -71.6MB). Peak memory consumption was 2.8MB. Max. memory is 16.1GB. [2023-08-30 16:57:19,742 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 58.7MB. Free memory is still 36.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 350.91ms. Allocated memory is still 73.4MB. Free memory was 49.4MB in the beginning and 47.2MB in the end (delta: 2.2MB). Peak memory consumption was 21.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 47.08ms. Allocated memory is still 73.4MB. Free memory was 47.2MB in the beginning and 45.2MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 31.26ms. Allocated memory is still 73.4MB. Free memory was 45.2MB in the beginning and 43.7MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 293.60ms. Allocated memory is still 73.4MB. Free memory was 43.7MB in the beginning and 30.2MB in the end (delta: 13.5MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 3980.30ms. Allocated memory was 73.4MB in the beginning and 130.0MB in the end (delta: 56.6MB). Free memory was 51.9MB in the beginning and 34.0MB in the end (delta: 17.9MB). Peak memory consumption was 73.9MB. Max. memory is 16.1GB. * Witness Printer took 34.56ms. Allocated memory is still 130.0MB. Free memory was 34.0MB in the beginning and 105.6MB in the end (delta: -71.6MB). Peak memory consumption was 2.8MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 1.6s, 78 PlacesBefore, 26 PlacesAfterwards, 69 TransitionsBefore, 16 TransitionsAfterwards, 974 CoEnabledTransitionPairs, 5 FixpointIterations, 20 TrivialSequentialCompositions, 32 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 3 ConcurrentYvCompositions, 1 ChoiceCompositions, 56 TotalNumberOfCompositions, 1620 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 924, independent: 858, independent conditional: 0, independent unconditional: 858, dependent: 66, dependent conditional: 0, dependent unconditional: 66, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 534, independent: 512, independent conditional: 0, independent unconditional: 512, dependent: 22, dependent conditional: 0, dependent unconditional: 22, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 924, independent: 346, independent conditional: 0, independent unconditional: 346, dependent: 44, dependent conditional: 0, dependent unconditional: 44, unknown: 534, unknown conditional: 0, unknown unconditional: 534] , Statistics on independence cache: Total cache size (in pairs): 37, Positive cache size: 30, Positive conditional cache size: 0, Positive unconditional cache size: 30, Negative cache size: 7, Negative conditional cache size: 0, Negative unconditional cache size: 7, 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, 106 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: 3.9s, OverallIterations: 10, TraceHistogramMax: 1, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 0.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.7s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 285 SdHoareTripleChecker+Valid, 0.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 186 mSDsluCounter, 90 SdHoareTripleChecker+Invalid, 0.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 51 mSDsCounter, 39 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 526 IncrementalHoareTripleChecker+Invalid, 565 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 39 mSolverCounterUnsat, 39 mSDtfsCounter, 526 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 31 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=147occurred in iteration=4, InterpolantAutomatonStates: 45, 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, 112 NumberOfCodeBlocks, 112 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 102 ConstructedInterpolants, 0 QuantifiedInterpolants, 438 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 16:57:19,765 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE