./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread-nondet/nondet-array-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb692b52 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 ../sv-benchmarks/c/pthread-nondet/nondet-array-1.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 e22e1beeef18edf77effe210ae0122c1338eccee79cdab905e0b74599361bc08 --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-19 21:15:38,387 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 21:15:38,388 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 21:15:38,408 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 21:15:38,408 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 21:15:38,409 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 21:15:38,410 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 21:15:38,411 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 21:15:38,413 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 21:15:38,413 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 21:15:38,414 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 21:15:38,415 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 21:15:38,415 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 21:15:38,416 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 21:15:38,417 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 21:15:38,417 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 21:15:38,418 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 21:15:38,419 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 21:15:38,420 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 21:15:38,422 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 21:15:38,423 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 21:15:38,424 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 21:15:38,424 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 21:15:38,425 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 21:15:38,426 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 21:15:38,427 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 21:15:38,428 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 21:15:38,428 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 21:15:38,428 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 21:15:38,429 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 21:15:38,429 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 21:15:38,430 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 21:15:38,430 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 21:15:38,431 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 21:15:38,431 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 21:15:38,432 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 21:15:38,432 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 21:15:38,433 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 21:15:38,433 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 21:15:38,433 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 21:15:38,434 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 21:15:38,434 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 21:15:38,435 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-19 21:15:38,448 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 21:15:38,448 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 21:15:38,449 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 21:15:38,449 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 21:15:38,449 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 21:15:38,449 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 21:15:38,450 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 21:15:38,450 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 21:15:38,450 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 21:15:38,450 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 21:15:38,451 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-19 21:15:38,451 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-19 21:15:38,451 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-19 21:15:38,451 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 21:15:38,451 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 21:15:38,451 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 21:15:38,451 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 21:15:38,452 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-19 21:15:38,452 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 21:15:38,452 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 21:15:38,452 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 21:15:38,452 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 21:15:38,452 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 21:15:38,452 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 21:15:38,453 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 21:15:38,453 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 21:15:38,453 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 21:15:38,453 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 21:15:38,453 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-19 21:15:38,453 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-19 21:15:38,454 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 21:15:38,454 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 21:15:38,454 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 21:15:38,454 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e22e1beeef18edf77effe210ae0122c1338eccee79cdab905e0b74599361bc08 [2022-07-19 21:15:38,657 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 21:15:38,674 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 21:15:38,676 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 21:15:38,677 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 21:15:38,677 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 21:15:38,678 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread-nondet/nondet-array-1.i [2022-07-19 21:15:38,741 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/feb0f35e5/24d5dfdcb51446ef86881430f12d8f6f/FLAG8c320443c [2022-07-19 21:15:39,135 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 21:15:39,135 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-nondet/nondet-array-1.i [2022-07-19 21:15:39,154 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/feb0f35e5/24d5dfdcb51446ef86881430f12d8f6f/FLAG8c320443c [2022-07-19 21:15:39,507 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/feb0f35e5/24d5dfdcb51446ef86881430f12d8f6f [2022-07-19 21:15:39,511 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 21:15:39,513 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 21:15:39,516 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 21:15:39,516 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 21:15:39,518 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 21:15:39,519 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:15:39" (1/1) ... [2022-07-19 21:15:39,520 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@74011d15 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:15:39, skipping insertion in model container [2022-07-19 21:15:39,520 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:15:39" (1/1) ... [2022-07-19 21:15:39,526 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 21:15:39,558 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 21:15:39,890 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-nondet/nondet-array-1.i[30035,30048] [2022-07-19 21:15:39,906 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 21:15:39,913 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 21:15:39,944 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-nondet/nondet-array-1.i[30035,30048] [2022-07-19 21:15:39,957 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 21:15:39,983 INFO L208 MainTranslator]: Completed translation [2022-07-19 21:15:39,984 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:15:39 WrapperNode [2022-07-19 21:15:39,984 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 21:15:39,985 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 21:15:39,985 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 21:15:39,985 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 21:15:39,990 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:15:39" (1/1) ... [2022-07-19 21:15:40,009 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:15:39" (1/1) ... [2022-07-19 21:15:40,023 INFO L137 Inliner]: procedures = 170, calls = 18, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 73 [2022-07-19 21:15:40,024 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 21:15:40,024 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 21:15:40,024 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 21:15:40,025 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 21:15:40,031 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:15:39" (1/1) ... [2022-07-19 21:15:40,031 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:15:39" (1/1) ... [2022-07-19 21:15:40,039 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:15:39" (1/1) ... [2022-07-19 21:15:40,039 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:15:39" (1/1) ... [2022-07-19 21:15:40,052 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:15:39" (1/1) ... [2022-07-19 21:15:40,055 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:15:39" (1/1) ... [2022-07-19 21:15:40,056 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:15:39" (1/1) ... [2022-07-19 21:15:40,060 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 21:15:40,061 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 21:15:40,061 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 21:15:40,061 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 21:15:40,062 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:15:39" (1/1) ... [2022-07-19 21:15:40,067 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 21:15:40,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:15:40,085 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) [2022-07-19 21:15:40,087 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 [2022-07-19 21:15:40,111 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2022-07-19 21:15:40,111 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-19 21:15:40,111 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-19 21:15:40,112 INFO L130 BoogieDeclarations]: Found specification of procedure thr [2022-07-19 21:15:40,112 INFO L138 BoogieDeclarations]: Found implementation of procedure thr [2022-07-19 21:15:40,112 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 21:15:40,112 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-19 21:15:40,112 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-19 21:15:40,112 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-19 21:15:40,112 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 21:15:40,112 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 21:15:40,113 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-19 21:15:40,186 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 21:15:40,187 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 21:15:40,312 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 21:15:40,317 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 21:15:40,317 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-07-19 21:15:40,318 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:15:40 BoogieIcfgContainer [2022-07-19 21:15:40,318 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 21:15:40,320 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 21:15:40,320 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 21:15:40,322 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 21:15:40,322 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 09:15:39" (1/3) ... [2022-07-19 21:15:40,323 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64b2a9c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:15:40, skipping insertion in model container [2022-07-19 21:15:40,323 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:15:39" (2/3) ... [2022-07-19 21:15:40,323 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64b2a9c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:15:40, skipping insertion in model container [2022-07-19 21:15:40,323 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:15:40" (3/3) ... [2022-07-19 21:15:40,325 INFO L111 eAbstractionObserver]: Analyzing ICFG nondet-array-1.i [2022-07-19 21:15:40,328 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-19 21:15:40,334 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 21:15:40,334 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-19 21:15:40,335 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-19 21:15:40,365 INFO L135 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2022-07-19 21:15:40,392 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 84 places, 88 transitions, 184 flow [2022-07-19 21:15:40,447 INFO L129 PetriNetUnfolder]: 12/126 cut-off events. [2022-07-19 21:15:40,447 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-19 21:15:40,451 INFO L84 FinitePrefix]: Finished finitePrefix Result has 132 conditions, 126 events. 12/126 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 227 event pairs, 0 based on Foata normal form. 0/109 useless extension candidates. Maximal degree in co-relation 71. Up to 4 conditions per place. [2022-07-19 21:15:40,451 INFO L82 GeneralOperation]: Start removeDead. Operand has 84 places, 88 transitions, 184 flow [2022-07-19 21:15:40,456 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 75 places, 78 transitions, 164 flow [2022-07-19 21:15:40,470 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:15:40,477 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=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@e1dbc24, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@745720f0 [2022-07-19 21:15:40,477 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-19 21:15:40,495 INFO L129 PetriNetUnfolder]: 6/74 cut-off events. [2022-07-19 21:15:40,496 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-19 21:15:40,496 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:15:40,497 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:15:40,497 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:15:40,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:15:40,502 INFO L85 PathProgramCache]: Analyzing trace with hash -940910248, now seen corresponding path program 1 times [2022-07-19 21:15:40,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:15:40,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624726982] [2022-07-19 21:15:40,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:15:40,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:15:40,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:15:40,709 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:15:40,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:15:40,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624726982] [2022-07-19 21:15:40,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624726982] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:15:40,710 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:15:40,710 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 21:15:40,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30784159] [2022-07-19 21:15:40,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:15:40,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-19 21:15:40,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:15:40,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-19 21:15:40,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 21:15:40,739 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 88 [2022-07-19 21:15:40,741 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 78 transitions, 164 flow. Second operand has 2 states, 2 states have (on average 80.5) internal successors, (161), 2 states have internal predecessors, (161), 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) [2022-07-19 21:15:40,741 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:15:40,741 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 88 [2022-07-19 21:15:40,742 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:15:40,758 INFO L129 PetriNetUnfolder]: 3/99 cut-off events. [2022-07-19 21:15:40,758 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-07-19 21:15:40,758 INFO L84 FinitePrefix]: Finished finitePrefix Result has 108 conditions, 99 events. 3/99 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 148 event pairs, 0 based on Foata normal form. 7/99 useless extension candidates. Maximal degree in co-relation 57. Up to 4 conditions per place. [2022-07-19 21:15:40,759 INFO L132 encePairwiseOnDemand]: 84/88 looper letters, 2 selfloop transitions, 0 changer transitions 1/74 dead transitions. [2022-07-19 21:15:40,759 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 74 transitions, 160 flow [2022-07-19 21:15:40,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-19 21:15:40,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-19 21:15:40,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 166 transitions. [2022-07-19 21:15:40,767 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9431818181818182 [2022-07-19 21:15:40,767 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 166 transitions. [2022-07-19 21:15:40,767 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 166 transitions. [2022-07-19 21:15:40,768 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:15:40,770 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 166 transitions. [2022-07-19 21:15:40,771 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 83.0) internal successors, (166), 2 states have internal predecessors, (166), 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) [2022-07-19 21:15:40,774 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 88.0) internal successors, (264), 3 states have internal predecessors, (264), 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) [2022-07-19 21:15:40,775 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 88.0) internal successors, (264), 3 states have internal predecessors, (264), 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) [2022-07-19 21:15:40,776 INFO L186 Difference]: Start difference. First operand has 75 places, 78 transitions, 164 flow. Second operand 2 states and 166 transitions. [2022-07-19 21:15:40,776 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 74 transitions, 160 flow [2022-07-19 21:15:40,778 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 74 transitions, 160 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-19 21:15:40,780 INFO L242 Difference]: Finished difference. Result has 76 places, 73 transitions, 154 flow [2022-07-19 21:15:40,781 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=154, PETRI_PLACES=76, PETRI_TRANSITIONS=73} [2022-07-19 21:15:40,783 INFO L279 CegarLoopForPetriNet]: 75 programPoint places, 1 predicate places. [2022-07-19 21:15:40,783 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 73 transitions, 154 flow [2022-07-19 21:15:40,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 80.5) internal successors, (161), 2 states have internal predecessors, (161), 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) [2022-07-19 21:15:40,784 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:15:40,784 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:15:40,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-19 21:15:40,785 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:15:40,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:15:40,785 INFO L85 PathProgramCache]: Analyzing trace with hash -53406567, now seen corresponding path program 1 times [2022-07-19 21:15:40,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:15:40,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669068915] [2022-07-19 21:15:40,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:15:40,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:15:40,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:15:40,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:15:40,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:15:40,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669068915] [2022-07-19 21:15:40,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669068915] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:15:40,897 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:15:40,897 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-19 21:15:40,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448177010] [2022-07-19 21:15:40,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:15:40,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-19 21:15:40,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:15:40,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-19 21:15:40,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-07-19 21:15:40,901 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 88 [2022-07-19 21:15:40,902 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 73 transitions, 154 flow. Second operand has 6 states, 6 states have (on average 56.166666666666664) internal successors, (337), 6 states have internal predecessors, (337), 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) [2022-07-19 21:15:40,902 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:15:40,902 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 88 [2022-07-19 21:15:40,902 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:15:40,963 INFO L129 PetriNetUnfolder]: 1/85 cut-off events. [2022-07-19 21:15:40,963 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-19 21:15:40,963 INFO L84 FinitePrefix]: Finished finitePrefix Result has 128 conditions, 85 events. 1/85 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 34 event pairs, 0 based on Foata normal form. 0/82 useless extension candidates. Maximal degree in co-relation 124. Up to 15 conditions per place. [2022-07-19 21:15:40,964 INFO L132 encePairwiseOnDemand]: 76/88 looper letters, 24 selfloop transitions, 9 changer transitions 2/81 dead transitions. [2022-07-19 21:15:40,964 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 81 transitions, 240 flow [2022-07-19 21:15:40,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-19 21:15:40,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-19 21:15:40,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 362 transitions. [2022-07-19 21:15:40,966 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6856060606060606 [2022-07-19 21:15:40,967 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 362 transitions. [2022-07-19 21:15:40,967 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 362 transitions. [2022-07-19 21:15:40,968 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:15:40,968 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 362 transitions. [2022-07-19 21:15:40,969 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 60.333333333333336) internal successors, (362), 6 states have internal predecessors, (362), 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) [2022-07-19 21:15:40,971 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 88.0) internal successors, (616), 7 states have internal predecessors, (616), 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) [2022-07-19 21:15:40,971 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 88.0) internal successors, (616), 7 states have internal predecessors, (616), 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) [2022-07-19 21:15:40,971 INFO L186 Difference]: Start difference. First operand has 76 places, 73 transitions, 154 flow. Second operand 6 states and 362 transitions. [2022-07-19 21:15:40,971 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 81 transitions, 240 flow [2022-07-19 21:15:40,972 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 81 transitions, 240 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-19 21:15:40,973 INFO L242 Difference]: Finished difference. Result has 81 places, 74 transitions, 188 flow [2022-07-19 21:15:40,974 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=188, PETRI_PLACES=81, PETRI_TRANSITIONS=74} [2022-07-19 21:15:40,974 INFO L279 CegarLoopForPetriNet]: 75 programPoint places, 6 predicate places. [2022-07-19 21:15:40,974 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 74 transitions, 188 flow [2022-07-19 21:15:40,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 56.166666666666664) internal successors, (337), 6 states have internal predecessors, (337), 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) [2022-07-19 21:15:40,975 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:15:40,975 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:15:40,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-19 21:15:40,975 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:15:40,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:15:40,976 INFO L85 PathProgramCache]: Analyzing trace with hash -658806082, now seen corresponding path program 1 times [2022-07-19 21:15:40,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:15:40,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111978357] [2022-07-19 21:15:40,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:15:40,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:15:40,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:15:40,999 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-19 21:15:41,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:15:41,026 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-19 21:15:41,027 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-19 21:15:41,027 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-19 21:15:41,029 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-19 21:15:41,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-19 21:15:41,029 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-07-19 21:15:41,031 WARN L231 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-19 21:15:41,031 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-07-19 21:15:41,045 INFO L135 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-07-19 21:15:41,046 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 92 places, 95 transitions, 208 flow [2022-07-19 21:15:41,063 INFO L129 PetriNetUnfolder]: 23/217 cut-off events. [2022-07-19 21:15:41,063 INFO L130 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-07-19 21:15:41,064 INFO L84 FinitePrefix]: Finished finitePrefix Result has 231 conditions, 217 events. 23/217 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 513 event pairs, 0 based on Foata normal form. 0/186 useless extension candidates. Maximal degree in co-relation 128. Up to 8 conditions per place. [2022-07-19 21:15:41,064 INFO L82 GeneralOperation]: Start removeDead. Operand has 92 places, 95 transitions, 208 flow [2022-07-19 21:15:41,065 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 83 places, 85 transitions, 188 flow [2022-07-19 21:15:41,066 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:15:41,067 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=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@e1dbc24, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@745720f0 [2022-07-19 21:15:41,067 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-19 21:15:41,072 INFO L129 PetriNetUnfolder]: 6/74 cut-off events. [2022-07-19 21:15:41,072 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-19 21:15:41,072 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:15:41,072 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:15:41,072 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:15:41,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:15:41,073 INFO L85 PathProgramCache]: Analyzing trace with hash 348299546, now seen corresponding path program 1 times [2022-07-19 21:15:41,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:15:41,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050112684] [2022-07-19 21:15:41,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:15:41,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:15:41,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:15:41,096 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:15:41,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:15:41,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050112684] [2022-07-19 21:15:41,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050112684] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:15:41,097 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:15:41,097 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 21:15:41,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480527227] [2022-07-19 21:15:41,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:15:41,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-19 21:15:41,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:15:41,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-19 21:15:41,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 21:15:41,099 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 95 [2022-07-19 21:15:41,100 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 85 transitions, 188 flow. Second operand has 2 states, 2 states have (on average 86.0) internal successors, (172), 2 states have internal predecessors, (172), 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) [2022-07-19 21:15:41,100 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:15:41,100 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 95 [2022-07-19 21:15:41,100 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:15:41,129 INFO L129 PetriNetUnfolder]: 7/165 cut-off events. [2022-07-19 21:15:41,130 INFO L130 PetriNetUnfolder]: For 17/17 co-relation queries the response was YES. [2022-07-19 21:15:41,130 INFO L84 FinitePrefix]: Finished finitePrefix Result has 186 conditions, 165 events. 7/165 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 324 event pairs, 0 based on Foata normal form. 12/165 useless extension candidates. Maximal degree in co-relation 103. Up to 8 conditions per place. [2022-07-19 21:15:41,130 INFO L132 encePairwiseOnDemand]: 91/95 looper letters, 4 selfloop transitions, 0 changer transitions 1/81 dead transitions. [2022-07-19 21:15:41,131 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 81 transitions, 188 flow [2022-07-19 21:15:41,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-19 21:15:41,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-19 21:15:41,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 178 transitions. [2022-07-19 21:15:41,132 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9368421052631579 [2022-07-19 21:15:41,132 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 178 transitions. [2022-07-19 21:15:41,132 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 178 transitions. [2022-07-19 21:15:41,132 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:15:41,133 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 178 transitions. [2022-07-19 21:15:41,133 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 89.0) internal successors, (178), 2 states have internal predecessors, (178), 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) [2022-07-19 21:15:41,134 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 95.0) internal successors, (285), 3 states have internal predecessors, (285), 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) [2022-07-19 21:15:41,134 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 95.0) internal successors, (285), 3 states have internal predecessors, (285), 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) [2022-07-19 21:15:41,134 INFO L186 Difference]: Start difference. First operand has 83 places, 85 transitions, 188 flow. Second operand 2 states and 178 transitions. [2022-07-19 21:15:41,134 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 81 transitions, 188 flow [2022-07-19 21:15:41,135 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 81 transitions, 188 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-19 21:15:41,136 INFO L242 Difference]: Finished difference. Result has 84 places, 80 transitions, 178 flow [2022-07-19 21:15:41,136 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=95, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=178, PETRI_PLACES=84, PETRI_TRANSITIONS=80} [2022-07-19 21:15:41,137 INFO L279 CegarLoopForPetriNet]: 83 programPoint places, 1 predicate places. [2022-07-19 21:15:41,137 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 80 transitions, 178 flow [2022-07-19 21:15:41,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 86.0) internal successors, (172), 2 states have internal predecessors, (172), 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) [2022-07-19 21:15:41,137 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:15:41,137 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:15:41,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-19 21:15:41,138 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:15:41,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:15:41,138 INFO L85 PathProgramCache]: Analyzing trace with hash 280868760, now seen corresponding path program 1 times [2022-07-19 21:15:41,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:15:41,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869458629] [2022-07-19 21:15:41,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:15:41,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:15:41,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:15:41,219 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:15:41,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:15:41,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869458629] [2022-07-19 21:15:41,220 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869458629] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:15:41,220 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:15:41,220 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-19 21:15:41,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355514233] [2022-07-19 21:15:41,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:15:41,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-19 21:15:41,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:15:41,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-19 21:15:41,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-07-19 21:15:41,233 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 95 [2022-07-19 21:15:41,233 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 80 transitions, 178 flow. Second operand has 6 states, 6 states have (on average 61.166666666666664) internal successors, (367), 6 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:15:41,234 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:15:41,234 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 95 [2022-07-19 21:15:41,234 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:15:41,325 INFO L129 PetriNetUnfolder]: 5/169 cut-off events. [2022-07-19 21:15:41,326 INFO L130 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-07-19 21:15:41,326 INFO L84 FinitePrefix]: Finished finitePrefix Result has 266 conditions, 169 events. 5/169 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 318 event pairs, 0 based on Foata normal form. 0/161 useless extension candidates. Maximal degree in co-relation 261. Up to 45 conditions per place. [2022-07-19 21:15:41,326 INFO L132 encePairwiseOnDemand]: 83/95 looper letters, 34 selfloop transitions, 9 changer transitions 0/94 dead transitions. [2022-07-19 21:15:41,327 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 94 transitions, 298 flow [2022-07-19 21:15:41,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-19 21:15:41,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-19 21:15:41,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 400 transitions. [2022-07-19 21:15:41,328 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7017543859649122 [2022-07-19 21:15:41,328 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 400 transitions. [2022-07-19 21:15:41,328 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 400 transitions. [2022-07-19 21:15:41,329 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:15:41,329 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 400 transitions. [2022-07-19 21:15:41,330 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 66.66666666666667) internal successors, (400), 6 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) [2022-07-19 21:15:41,331 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 95.0) internal successors, (665), 7 states have internal predecessors, (665), 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) [2022-07-19 21:15:41,331 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 95.0) internal successors, (665), 7 states have internal predecessors, (665), 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) [2022-07-19 21:15:41,332 INFO L186 Difference]: Start difference. First operand has 84 places, 80 transitions, 178 flow. Second operand 6 states and 400 transitions. [2022-07-19 21:15:41,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 94 transitions, 298 flow [2022-07-19 21:15:41,332 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 94 transitions, 298 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-19 21:15:41,334 INFO L242 Difference]: Finished difference. Result has 89 places, 83 transitions, 220 flow [2022-07-19 21:15:41,334 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=95, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=220, PETRI_PLACES=89, PETRI_TRANSITIONS=83} [2022-07-19 21:15:41,335 INFO L279 CegarLoopForPetriNet]: 83 programPoint places, 6 predicate places. [2022-07-19 21:15:41,335 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 83 transitions, 220 flow [2022-07-19 21:15:41,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 61.166666666666664) internal successors, (367), 6 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:15:41,335 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:15:41,336 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:15:41,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-19 21:15:41,336 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:15:41,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:15:41,336 INFO L85 PathProgramCache]: Analyzing trace with hash 618023769, now seen corresponding path program 1 times [2022-07-19 21:15:41,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:15:41,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162079975] [2022-07-19 21:15:41,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:15:41,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:15:41,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:15:41,373 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-19 21:15:41,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:15:41,427 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-19 21:15:41,427 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-19 21:15:41,428 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-19 21:15:41,428 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-19 21:15:41,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-19 21:15:41,428 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-07-19 21:15:41,429 WARN L231 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-19 21:15:41,429 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-07-19 21:15:41,439 INFO L135 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-07-19 21:15:41,440 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 100 places, 102 transitions, 234 flow [2022-07-19 21:15:41,457 INFO L129 PetriNetUnfolder]: 45/383 cut-off events. [2022-07-19 21:15:41,457 INFO L130 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2022-07-19 21:15:41,457 INFO L84 FinitePrefix]: Finished finitePrefix Result has 411 conditions, 383 events. 45/383 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 1194 event pairs, 1 based on Foata normal form. 0/326 useless extension candidates. Maximal degree in co-relation 225. Up to 16 conditions per place. [2022-07-19 21:15:41,458 INFO L82 GeneralOperation]: Start removeDead. Operand has 100 places, 102 transitions, 234 flow [2022-07-19 21:15:41,459 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 91 places, 92 transitions, 214 flow [2022-07-19 21:15:41,459 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:15:41,460 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=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@e1dbc24, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@745720f0 [2022-07-19 21:15:41,460 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-19 21:15:41,463 INFO L129 PetriNetUnfolder]: 6/74 cut-off events. [2022-07-19 21:15:41,463 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-19 21:15:41,463 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:15:41,463 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:15:41,463 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:15:41,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:15:41,464 INFO L85 PathProgramCache]: Analyzing trace with hash 429396767, now seen corresponding path program 1 times [2022-07-19 21:15:41,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:15:41,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701536302] [2022-07-19 21:15:41,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:15:41,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:15:41,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:15:41,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:15:41,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:15:41,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701536302] [2022-07-19 21:15:41,491 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701536302] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:15:41,491 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:15:41,491 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 21:15:41,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486834902] [2022-07-19 21:15:41,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:15:41,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-19 21:15:41,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:15:41,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-19 21:15:41,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 21:15:41,492 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 102 [2022-07-19 21:15:41,493 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 92 transitions, 214 flow. Second operand has 2 states, 2 states have (on average 90.5) internal successors, (181), 2 states have internal predecessors, (181), 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) [2022-07-19 21:15:41,493 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:15:41,493 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 102 [2022-07-19 21:15:41,493 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:15:41,530 INFO L129 PetriNetUnfolder]: 16/282 cut-off events. [2022-07-19 21:15:41,531 INFO L130 PetriNetUnfolder]: For 49/49 co-relation queries the response was YES. [2022-07-19 21:15:41,531 INFO L84 FinitePrefix]: Finished finitePrefix Result has 326 conditions, 282 events. 16/282 cut-off events. For 49/49 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 789 event pairs, 1 based on Foata normal form. 21/282 useless extension candidates. Maximal degree in co-relation 179. Up to 16 conditions per place. [2022-07-19 21:15:41,532 INFO L132 encePairwiseOnDemand]: 98/102 looper letters, 6 selfloop transitions, 0 changer transitions 1/88 dead transitions. [2022-07-19 21:15:41,532 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 88 transitions, 218 flow [2022-07-19 21:15:41,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-19 21:15:41,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-19 21:15:41,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 190 transitions. [2022-07-19 21:15:41,533 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9313725490196079 [2022-07-19 21:15:41,533 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 190 transitions. [2022-07-19 21:15:41,533 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 190 transitions. [2022-07-19 21:15:41,533 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:15:41,533 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 190 transitions. [2022-07-19 21:15:41,534 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 95.0) internal successors, (190), 2 states have internal predecessors, (190), 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) [2022-07-19 21:15:41,534 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 102.0) internal successors, (306), 3 states have internal predecessors, (306), 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) [2022-07-19 21:15:41,535 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 102.0) internal successors, (306), 3 states have internal predecessors, (306), 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) [2022-07-19 21:15:41,535 INFO L186 Difference]: Start difference. First operand has 91 places, 92 transitions, 214 flow. Second operand 2 states and 190 transitions. [2022-07-19 21:15:41,535 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 88 transitions, 218 flow [2022-07-19 21:15:41,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 88 transitions, 218 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-19 21:15:41,537 INFO L242 Difference]: Finished difference. Result has 92 places, 87 transitions, 204 flow [2022-07-19 21:15:41,537 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=204, PETRI_PLACES=92, PETRI_TRANSITIONS=87} [2022-07-19 21:15:41,538 INFO L279 CegarLoopForPetriNet]: 91 programPoint places, 1 predicate places. [2022-07-19 21:15:41,538 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 87 transitions, 204 flow [2022-07-19 21:15:41,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 90.5) internal successors, (181), 2 states have internal predecessors, (181), 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) [2022-07-19 21:15:41,538 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:15:41,538 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:15:41,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-19 21:15:41,539 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:15:41,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:15:41,539 INFO L85 PathProgramCache]: Analyzing trace with hash 232883262, now seen corresponding path program 1 times [2022-07-19 21:15:41,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:15:41,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126264451] [2022-07-19 21:15:41,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:15:41,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:15:41,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:15:41,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:15:41,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:15:41,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126264451] [2022-07-19 21:15:41,597 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126264451] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:15:41,597 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:15:41,597 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-19 21:15:41,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879201820] [2022-07-19 21:15:41,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:15:41,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-19 21:15:41,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:15:41,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-19 21:15:41,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-07-19 21:15:41,599 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 102 [2022-07-19 21:15:41,600 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 87 transitions, 204 flow. Second operand has 6 states, 6 states have (on average 66.16666666666667) internal successors, (397), 6 states have internal predecessors, (397), 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) [2022-07-19 21:15:41,600 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:15:41,600 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 102 [2022-07-19 21:15:41,600 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:15:41,684 INFO L129 PetriNetUnfolder]: 15/320 cut-off events. [2022-07-19 21:15:41,685 INFO L130 PetriNetUnfolder]: For 22/22 co-relation queries the response was YES. [2022-07-19 21:15:41,685 INFO L84 FinitePrefix]: Finished finitePrefix Result has 516 conditions, 320 events. 15/320 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1079 event pairs, 0 based on Foata normal form. 0/303 useless extension candidates. Maximal degree in co-relation 510. Up to 103 conditions per place. [2022-07-19 21:15:41,686 INFO L132 encePairwiseOnDemand]: 90/102 looper letters, 37 selfloop transitions, 9 changer transitions 0/102 dead transitions. [2022-07-19 21:15:41,686 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 102 transitions, 335 flow [2022-07-19 21:15:41,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-19 21:15:41,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-19 21:15:41,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 433 transitions. [2022-07-19 21:15:41,688 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7075163398692811 [2022-07-19 21:15:41,688 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 433 transitions. [2022-07-19 21:15:41,688 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 433 transitions. [2022-07-19 21:15:41,688 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:15:41,688 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 433 transitions. [2022-07-19 21:15:41,689 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 72.16666666666667) internal successors, (433), 6 states have internal predecessors, (433), 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) [2022-07-19 21:15:41,690 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 102.0) internal successors, (714), 7 states have internal predecessors, (714), 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) [2022-07-19 21:15:41,690 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 102.0) internal successors, (714), 7 states have internal predecessors, (714), 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) [2022-07-19 21:15:41,690 INFO L186 Difference]: Start difference. First operand has 92 places, 87 transitions, 204 flow. Second operand 6 states and 433 transitions. [2022-07-19 21:15:41,690 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 102 transitions, 335 flow [2022-07-19 21:15:41,691 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 102 transitions, 335 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-19 21:15:41,692 INFO L242 Difference]: Finished difference. Result has 97 places, 90 transitions, 246 flow [2022-07-19 21:15:41,692 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=246, PETRI_PLACES=97, PETRI_TRANSITIONS=90} [2022-07-19 21:15:41,693 INFO L279 CegarLoopForPetriNet]: 91 programPoint places, 6 predicate places. [2022-07-19 21:15:41,693 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 90 transitions, 246 flow [2022-07-19 21:15:41,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 66.16666666666667) internal successors, (397), 6 states have internal predecessors, (397), 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) [2022-07-19 21:15:41,694 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:15:41,694 INFO L200 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:15:41,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-19 21:15:41,694 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:15:41,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:15:41,695 INFO L85 PathProgramCache]: Analyzing trace with hash 1470109151, now seen corresponding path program 1 times [2022-07-19 21:15:41,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:15:41,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637637787] [2022-07-19 21:15:41,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:15:41,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:15:41,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:15:41,710 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-19 21:15:41,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:15:41,725 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-19 21:15:41,725 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-19 21:15:41,725 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-19 21:15:41,725 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-19 21:15:41,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-19 21:15:41,726 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-07-19 21:15:41,726 WARN L231 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-19 21:15:41,726 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-07-19 21:15:41,736 INFO L135 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-07-19 21:15:41,737 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 108 places, 109 transitions, 262 flow [2022-07-19 21:15:41,772 INFO L129 PetriNetUnfolder]: 91/701 cut-off events. [2022-07-19 21:15:41,773 INFO L130 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2022-07-19 21:15:41,774 INFO L84 FinitePrefix]: Finished finitePrefix Result has 756 conditions, 701 events. 91/701 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 3077 event pairs, 6 based on Foata normal form. 0/594 useless extension candidates. Maximal degree in co-relation 403. Up to 32 conditions per place. [2022-07-19 21:15:41,774 INFO L82 GeneralOperation]: Start removeDead. Operand has 108 places, 109 transitions, 262 flow [2022-07-19 21:15:41,775 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 99 places, 99 transitions, 242 flow [2022-07-19 21:15:41,776 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:15:41,777 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=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@e1dbc24, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@745720f0 [2022-07-19 21:15:41,777 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-19 21:15:41,779 INFO L129 PetriNetUnfolder]: 6/74 cut-off events. [2022-07-19 21:15:41,780 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-19 21:15:41,780 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:15:41,780 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:15:41,780 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:15:41,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:15:41,780 INFO L85 PathProgramCache]: Analyzing trace with hash -326445780, now seen corresponding path program 1 times [2022-07-19 21:15:41,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:15:41,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702254158] [2022-07-19 21:15:41,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:15:41,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:15:41,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:15:41,809 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:15:41,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:15:41,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702254158] [2022-07-19 21:15:41,810 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702254158] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:15:41,810 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:15:41,810 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 21:15:41,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835284622] [2022-07-19 21:15:41,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:15:41,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-19 21:15:41,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:15:41,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-19 21:15:41,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 21:15:41,812 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 109 [2022-07-19 21:15:41,812 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 99 transitions, 242 flow. Second operand has 2 states, 2 states have (on average 95.5) internal successors, (191), 2 states have internal predecessors, (191), 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) [2022-07-19 21:15:41,812 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:15:41,813 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 109 [2022-07-19 21:15:41,813 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:15:41,852 INFO L129 PetriNetUnfolder]: 37/503 cut-off events. [2022-07-19 21:15:41,853 INFO L130 PetriNetUnfolder]: For 122/122 co-relation queries the response was YES. [2022-07-19 21:15:41,854 INFO L84 FinitePrefix]: Finished finitePrefix Result has 595 conditions, 503 events. 37/503 cut-off events. For 122/122 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1975 event pairs, 6 based on Foata normal form. 38/503 useless extension candidates. Maximal degree in co-relation 317. Up to 37 conditions per place. [2022-07-19 21:15:41,855 INFO L132 encePairwiseOnDemand]: 105/109 looper letters, 8 selfloop transitions, 0 changer transitions 1/95 dead transitions. [2022-07-19 21:15:41,855 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 95 transitions, 250 flow [2022-07-19 21:15:41,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-19 21:15:41,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-19 21:15:41,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 202 transitions. [2022-07-19 21:15:41,856 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.926605504587156 [2022-07-19 21:15:41,856 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 202 transitions. [2022-07-19 21:15:41,856 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 202 transitions. [2022-07-19 21:15:41,856 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:15:41,857 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 202 transitions. [2022-07-19 21:15:41,857 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 101.0) internal successors, (202), 2 states have internal predecessors, (202), 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) [2022-07-19 21:15:41,857 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 109.0) internal successors, (327), 3 states have internal predecessors, (327), 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) [2022-07-19 21:15:41,858 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 109.0) internal successors, (327), 3 states have internal predecessors, (327), 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) [2022-07-19 21:15:41,858 INFO L186 Difference]: Start difference. First operand has 99 places, 99 transitions, 242 flow. Second operand 2 states and 202 transitions. [2022-07-19 21:15:41,858 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 95 transitions, 250 flow [2022-07-19 21:15:41,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 95 transitions, 250 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-19 21:15:41,860 INFO L242 Difference]: Finished difference. Result has 100 places, 94 transitions, 232 flow [2022-07-19 21:15:41,860 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=109, PETRI_DIFFERENCE_MINUEND_FLOW=234, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=232, PETRI_PLACES=100, PETRI_TRANSITIONS=94} [2022-07-19 21:15:41,861 INFO L279 CegarLoopForPetriNet]: 99 programPoint places, 1 predicate places. [2022-07-19 21:15:41,861 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 94 transitions, 232 flow [2022-07-19 21:15:41,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 95.5) internal successors, (191), 2 states have internal predecessors, (191), 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) [2022-07-19 21:15:41,862 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:15:41,862 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:15:41,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-19 21:15:41,862 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:15:41,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:15:41,863 INFO L85 PathProgramCache]: Analyzing trace with hash -197363061, now seen corresponding path program 1 times [2022-07-19 21:15:41,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:15:41,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299843400] [2022-07-19 21:15:41,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:15:41,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:15:41,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:15:41,918 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:15:41,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:15:41,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299843400] [2022-07-19 21:15:41,919 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299843400] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:15:41,919 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:15:41,919 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-19 21:15:41,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560101223] [2022-07-19 21:15:41,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:15:41,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-19 21:15:41,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:15:41,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-19 21:15:41,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-07-19 21:15:41,921 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 109 [2022-07-19 21:15:41,922 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 94 transitions, 232 flow. Second operand has 6 states, 6 states have (on average 71.16666666666667) internal successors, (427), 6 states have internal predecessors, (427), 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) [2022-07-19 21:15:41,922 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:15:41,922 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 109 [2022-07-19 21:15:41,922 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:15:42,019 INFO L129 PetriNetUnfolder]: 38/603 cut-off events. [2022-07-19 21:15:42,020 INFO L130 PetriNetUnfolder]: For 54/54 co-relation queries the response was YES. [2022-07-19 21:15:42,021 INFO L84 FinitePrefix]: Finished finitePrefix Result has 987 conditions, 603 events. 38/603 cut-off events. For 54/54 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 2860 event pairs, 1 based on Foata normal form. 0/569 useless extension candidates. Maximal degree in co-relation 980. Up to 218 conditions per place. [2022-07-19 21:15:42,022 INFO L132 encePairwiseOnDemand]: 97/109 looper letters, 40 selfloop transitions, 9 changer transitions 0/110 dead transitions. [2022-07-19 21:15:42,022 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 110 transitions, 374 flow [2022-07-19 21:15:42,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-19 21:15:42,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-19 21:15:42,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 466 transitions. [2022-07-19 21:15:42,024 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7125382262996942 [2022-07-19 21:15:42,024 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 466 transitions. [2022-07-19 21:15:42,024 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 466 transitions. [2022-07-19 21:15:42,024 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:15:42,024 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 466 transitions. [2022-07-19 21:15:42,025 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 77.66666666666667) internal successors, (466), 6 states have internal predecessors, (466), 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) [2022-07-19 21:15:42,026 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 109.0) internal successors, (763), 7 states have internal predecessors, (763), 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) [2022-07-19 21:15:42,026 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 109.0) internal successors, (763), 7 states have internal predecessors, (763), 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) [2022-07-19 21:15:42,026 INFO L186 Difference]: Start difference. First operand has 100 places, 94 transitions, 232 flow. Second operand 6 states and 466 transitions. [2022-07-19 21:15:42,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 110 transitions, 374 flow [2022-07-19 21:15:42,027 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 110 transitions, 374 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-19 21:15:42,028 INFO L242 Difference]: Finished difference. Result has 105 places, 97 transitions, 274 flow [2022-07-19 21:15:42,029 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=109, PETRI_DIFFERENCE_MINUEND_FLOW=232, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=274, PETRI_PLACES=105, PETRI_TRANSITIONS=97} [2022-07-19 21:15:42,029 INFO L279 CegarLoopForPetriNet]: 99 programPoint places, 6 predicate places. [2022-07-19 21:15:42,029 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 97 transitions, 274 flow [2022-07-19 21:15:42,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 71.16666666666667) internal successors, (427), 6 states have internal predecessors, (427), 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) [2022-07-19 21:15:42,030 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:15:42,030 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:15:42,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-19 21:15:42,030 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:15:42,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:15:42,031 INFO L85 PathProgramCache]: Analyzing trace with hash 1092255810, now seen corresponding path program 1 times [2022-07-19 21:15:42,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:15:42,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018763188] [2022-07-19 21:15:42,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:15:42,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:15:42,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:15:42,120 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 21:15:42,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:15:42,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018763188] [2022-07-19 21:15:42,121 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018763188] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:15:42,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329539201] [2022-07-19 21:15:42,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:15:42,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:15:42,122 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:15:42,160 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:15:42,196 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-19 21:15:42,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:15:42,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-19 21:15:42,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:15:42,416 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 21:15:42,417 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:15:42,487 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 21:15:42,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1329539201] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:15:42,487 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:15:42,487 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2022-07-19 21:15:42,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099550339] [2022-07-19 21:15:42,488 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:15:42,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-19 21:15:42,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:15:42,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-19 21:15:42,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=240, Unknown=0, NotChecked=0, Total=342 [2022-07-19 21:15:42,490 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 109 [2022-07-19 21:15:42,491 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 97 transitions, 274 flow. Second operand has 19 states, 19 states have (on average 70.73684210526316) internal successors, (1344), 19 states have internal predecessors, (1344), 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) [2022-07-19 21:15:42,491 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:15:42,491 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 109 [2022-07-19 21:15:42,491 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:15:42,873 INFO L129 PetriNetUnfolder]: 35/583 cut-off events. [2022-07-19 21:15:42,873 INFO L130 PetriNetUnfolder]: For 130/130 co-relation queries the response was YES. [2022-07-19 21:15:42,874 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1081 conditions, 583 events. 35/583 cut-off events. For 130/130 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 2948 event pairs, 2 based on Foata normal form. 2/585 useless extension candidates. Maximal degree in co-relation 1072. Up to 125 conditions per place. [2022-07-19 21:15:42,875 INFO L132 encePairwiseOnDemand]: 94/109 looper letters, 37 selfloop transitions, 20 changer transitions 0/117 dead transitions. [2022-07-19 21:15:42,875 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 117 transitions, 442 flow [2022-07-19 21:15:42,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-19 21:15:42,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-07-19 21:15:42,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 875 transitions. [2022-07-19 21:15:42,877 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.668960244648318 [2022-07-19 21:15:42,877 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 875 transitions. [2022-07-19 21:15:42,877 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 875 transitions. [2022-07-19 21:15:42,878 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:15:42,878 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 875 transitions. [2022-07-19 21:15:42,879 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 72.91666666666667) internal successors, (875), 12 states have internal predecessors, (875), 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) [2022-07-19 21:15:42,880 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 109.0) internal successors, (1417), 13 states have internal predecessors, (1417), 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) [2022-07-19 21:15:42,881 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 109.0) internal successors, (1417), 13 states have internal predecessors, (1417), 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) [2022-07-19 21:15:42,881 INFO L186 Difference]: Start difference. First operand has 105 places, 97 transitions, 274 flow. Second operand 12 states and 875 transitions. [2022-07-19 21:15:42,881 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 117 transitions, 442 flow [2022-07-19 21:15:42,882 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 117 transitions, 430 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-07-19 21:15:42,884 INFO L242 Difference]: Finished difference. Result has 115 places, 105 transitions, 355 flow [2022-07-19 21:15:42,884 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=109, PETRI_DIFFERENCE_MINUEND_FLOW=262, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=355, PETRI_PLACES=115, PETRI_TRANSITIONS=105} [2022-07-19 21:15:42,884 INFO L279 CegarLoopForPetriNet]: 99 programPoint places, 16 predicate places. [2022-07-19 21:15:42,884 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 105 transitions, 355 flow [2022-07-19 21:15:42,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 70.73684210526316) internal successors, (1344), 19 states have internal predecessors, (1344), 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) [2022-07-19 21:15:42,885 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:15:42,885 INFO L200 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:15:42,918 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-19 21:15:43,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-07-19 21:15:43,103 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:15:43,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:15:43,103 INFO L85 PathProgramCache]: Analyzing trace with hash -1090444432, now seen corresponding path program 1 times [2022-07-19 21:15:43,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:15:43,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004483187] [2022-07-19 21:15:43,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:15:43,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:15:43,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:15:43,119 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-19 21:15:43,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:15:43,133 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-19 21:15:43,134 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-19 21:15:43,134 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-19 21:15:43,134 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-19 21:15:43,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-19 21:15:43,134 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-07-19 21:15:43,135 WARN L231 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-19 21:15:43,135 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2022-07-19 21:15:43,144 INFO L135 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2022-07-19 21:15:43,145 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 116 places, 116 transitions, 292 flow [2022-07-19 21:15:43,257 INFO L129 PetriNetUnfolder]: 189/1327 cut-off events. [2022-07-19 21:15:43,257 INFO L130 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2022-07-19 21:15:43,260 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1438 conditions, 1327 events. 189/1327 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 7697 event pairs, 23 based on Foata normal form. 0/1122 useless extension candidates. Maximal degree in co-relation 746. Up to 80 conditions per place. [2022-07-19 21:15:43,261 INFO L82 GeneralOperation]: Start removeDead. Operand has 116 places, 116 transitions, 292 flow [2022-07-19 21:15:43,264 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 107 places, 106 transitions, 272 flow [2022-07-19 21:15:43,265 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:15:43,265 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=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@e1dbc24, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@745720f0 [2022-07-19 21:15:43,265 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-19 21:15:43,269 INFO L129 PetriNetUnfolder]: 6/74 cut-off events. [2022-07-19 21:15:43,269 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-19 21:15:43,269 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:15:43,269 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:15:43,269 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:15:43,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:15:43,269 INFO L85 PathProgramCache]: Analyzing trace with hash -1138952928, now seen corresponding path program 1 times [2022-07-19 21:15:43,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:15:43,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179411265] [2022-07-19 21:15:43,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:15:43,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:15:43,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:15:43,282 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:15:43,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:15:43,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179411265] [2022-07-19 21:15:43,282 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179411265] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:15:43,282 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:15:43,282 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 21:15:43,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398162017] [2022-07-19 21:15:43,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:15:43,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-19 21:15:43,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:15:43,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-19 21:15:43,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 21:15:43,284 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 116 [2022-07-19 21:15:43,284 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 106 transitions, 272 flow. Second operand has 2 states, 2 states have (on average 100.5) internal successors, (201), 2 states have internal predecessors, (201), 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) [2022-07-19 21:15:43,284 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:15:43,284 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 116 [2022-07-19 21:15:43,284 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:15:43,350 INFO L129 PetriNetUnfolder]: 86/936 cut-off events. [2022-07-19 21:15:43,350 INFO L130 PetriNetUnfolder]: For 285/285 co-relation queries the response was YES. [2022-07-19 21:15:43,352 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1133 conditions, 936 events. 86/936 cut-off events. For 285/285 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 4961 event pairs, 23 based on Foata normal form. 71/936 useless extension candidates. Maximal degree in co-relation 584. Up to 86 conditions per place. [2022-07-19 21:15:43,353 INFO L132 encePairwiseOnDemand]: 112/116 looper letters, 10 selfloop transitions, 0 changer transitions 1/102 dead transitions. [2022-07-19 21:15:43,353 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 102 transitions, 284 flow [2022-07-19 21:15:43,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-19 21:15:43,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-19 21:15:43,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 214 transitions. [2022-07-19 21:15:43,354 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9224137931034483 [2022-07-19 21:15:43,354 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 214 transitions. [2022-07-19 21:15:43,355 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 214 transitions. [2022-07-19 21:15:43,355 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:15:43,355 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 214 transitions. [2022-07-19 21:15:43,355 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 107.0) internal successors, (214), 2 states have internal predecessors, (214), 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) [2022-07-19 21:15:43,356 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 116.0) internal successors, (348), 3 states have internal predecessors, (348), 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) [2022-07-19 21:15:43,356 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 116.0) internal successors, (348), 3 states have internal predecessors, (348), 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) [2022-07-19 21:15:43,356 INFO L186 Difference]: Start difference. First operand has 107 places, 106 transitions, 272 flow. Second operand 2 states and 214 transitions. [2022-07-19 21:15:43,356 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 102 transitions, 284 flow [2022-07-19 21:15:43,357 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 102 transitions, 284 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-19 21:15:43,358 INFO L242 Difference]: Finished difference. Result has 108 places, 101 transitions, 262 flow [2022-07-19 21:15:43,358 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=264, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=262, PETRI_PLACES=108, PETRI_TRANSITIONS=101} [2022-07-19 21:15:43,358 INFO L279 CegarLoopForPetriNet]: 107 programPoint places, 1 predicate places. [2022-07-19 21:15:43,359 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 101 transitions, 262 flow [2022-07-19 21:15:43,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 100.5) internal successors, (201), 2 states have internal predecessors, (201), 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) [2022-07-19 21:15:43,359 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:15:43,359 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:15:43,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-19 21:15:43,359 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:15:43,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:15:43,359 INFO L85 PathProgramCache]: Analyzing trace with hash -1009870209, now seen corresponding path program 1 times [2022-07-19 21:15:43,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:15:43,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287135169] [2022-07-19 21:15:43,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:15:43,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:15:43,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:15:43,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:15:43,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:15:43,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287135169] [2022-07-19 21:15:43,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287135169] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:15:43,406 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:15:43,406 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-19 21:15:43,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68488350] [2022-07-19 21:15:43,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:15:43,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-19 21:15:43,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:15:43,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-19 21:15:43,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-07-19 21:15:43,408 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 116 [2022-07-19 21:15:43,408 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 101 transitions, 262 flow. Second operand has 6 states, 6 states have (on average 76.16666666666667) internal successors, (457), 6 states have internal predecessors, (457), 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) [2022-07-19 21:15:43,408 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:15:43,408 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 116 [2022-07-19 21:15:43,408 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:15:43,574 INFO L129 PetriNetUnfolder]: 90/1150 cut-off events. [2022-07-19 21:15:43,575 INFO L130 PetriNetUnfolder]: For 120/120 co-relation queries the response was YES. [2022-07-19 21:15:43,578 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1903 conditions, 1150 events. 90/1150 cut-off events. For 120/120 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 7076 event pairs, 7 based on Foata normal form. 0/1083 useless extension candidates. Maximal degree in co-relation 1895. Up to 450 conditions per place. [2022-07-19 21:15:43,581 INFO L132 encePairwiseOnDemand]: 104/116 looper letters, 43 selfloop transitions, 9 changer transitions 0/118 dead transitions. [2022-07-19 21:15:43,581 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 118 transitions, 415 flow [2022-07-19 21:15:43,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-19 21:15:43,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-19 21:15:43,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 499 transitions. [2022-07-19 21:15:43,583 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7169540229885057 [2022-07-19 21:15:43,583 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 499 transitions. [2022-07-19 21:15:43,583 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 499 transitions. [2022-07-19 21:15:43,583 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:15:43,584 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 499 transitions. [2022-07-19 21:15:43,585 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 83.16666666666667) internal successors, (499), 6 states have internal predecessors, (499), 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) [2022-07-19 21:15:43,586 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 116.0) internal successors, (812), 7 states have internal predecessors, (812), 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) [2022-07-19 21:15:43,586 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 116.0) internal successors, (812), 7 states have internal predecessors, (812), 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) [2022-07-19 21:15:43,586 INFO L186 Difference]: Start difference. First operand has 108 places, 101 transitions, 262 flow. Second operand 6 states and 499 transitions. [2022-07-19 21:15:43,587 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 118 transitions, 415 flow [2022-07-19 21:15:43,588 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 118 transitions, 415 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-19 21:15:43,590 INFO L242 Difference]: Finished difference. Result has 113 places, 104 transitions, 304 flow [2022-07-19 21:15:43,590 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=262, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=304, PETRI_PLACES=113, PETRI_TRANSITIONS=104} [2022-07-19 21:15:43,590 INFO L279 CegarLoopForPetriNet]: 107 programPoint places, 6 predicate places. [2022-07-19 21:15:43,590 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 104 transitions, 304 flow [2022-07-19 21:15:43,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 76.16666666666667) internal successors, (457), 6 states have internal predecessors, (457), 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) [2022-07-19 21:15:43,591 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:15:43,591 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:15:43,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-19 21:15:43,591 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:15:43,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:15:43,592 INFO L85 PathProgramCache]: Analyzing trace with hash -796867189, now seen corresponding path program 1 times [2022-07-19 21:15:43,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:15:43,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318985927] [2022-07-19 21:15:43,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:15:43,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:15:43,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:15:43,695 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 21:15:43,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:15:43,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318985927] [2022-07-19 21:15:43,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318985927] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:15:43,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155469899] [2022-07-19 21:15:43,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:15:43,696 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:15:43,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:15:43,698 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:15:43,699 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-19 21:15:43,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:15:43,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-19 21:15:43,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:15:43,905 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 21:15:43,905 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:15:43,976 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 21:15:43,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1155469899] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:15:43,977 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:15:43,977 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2022-07-19 21:15:43,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100297070] [2022-07-19 21:15:43,977 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:15:43,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-19 21:15:43,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:15:43,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-19 21:15:43,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=240, Unknown=0, NotChecked=0, Total=342 [2022-07-19 21:15:43,979 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 116 [2022-07-19 21:15:43,980 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 104 transitions, 304 flow. Second operand has 19 states, 19 states have (on average 75.73684210526316) internal successors, (1439), 19 states have internal predecessors, (1439), 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) [2022-07-19 21:15:43,980 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:15:43,980 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 116 [2022-07-19 21:15:43,980 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:15:44,412 INFO L129 PetriNetUnfolder]: 87/1130 cut-off events. [2022-07-19 21:15:44,412 INFO L130 PetriNetUnfolder]: For 276/276 co-relation queries the response was YES. [2022-07-19 21:15:44,416 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2122 conditions, 1130 events. 87/1130 cut-off events. For 276/276 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 7292 event pairs, 8 based on Foata normal form. 2/1132 useless extension candidates. Maximal degree in co-relation 2112. Up to 271 conditions per place. [2022-07-19 21:15:44,418 INFO L132 encePairwiseOnDemand]: 101/116 looper letters, 40 selfloop transitions, 20 changer transitions 0/125 dead transitions. [2022-07-19 21:15:44,418 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 125 transitions, 483 flow [2022-07-19 21:15:44,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-19 21:15:44,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-07-19 21:15:44,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 938 transitions. [2022-07-19 21:15:44,421 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6738505747126436 [2022-07-19 21:15:44,421 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 938 transitions. [2022-07-19 21:15:44,421 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 938 transitions. [2022-07-19 21:15:44,422 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:15:44,422 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 938 transitions. [2022-07-19 21:15:44,423 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 78.16666666666667) internal successors, (938), 12 states have internal predecessors, (938), 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) [2022-07-19 21:15:44,425 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 116.0) internal successors, (1508), 13 states have internal predecessors, (1508), 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) [2022-07-19 21:15:44,425 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 116.0) internal successors, (1508), 13 states have internal predecessors, (1508), 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) [2022-07-19 21:15:44,425 INFO L186 Difference]: Start difference. First operand has 113 places, 104 transitions, 304 flow. Second operand 12 states and 938 transitions. [2022-07-19 21:15:44,425 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 125 transitions, 483 flow [2022-07-19 21:15:44,426 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 125 transitions, 471 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-07-19 21:15:44,428 INFO L242 Difference]: Finished difference. Result has 123 places, 112 transitions, 385 flow [2022-07-19 21:15:44,428 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=292, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=385, PETRI_PLACES=123, PETRI_TRANSITIONS=112} [2022-07-19 21:15:44,428 INFO L279 CegarLoopForPetriNet]: 107 programPoint places, 16 predicate places. [2022-07-19 21:15:44,428 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 112 transitions, 385 flow [2022-07-19 21:15:44,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 75.73684210526316) internal successors, (1439), 19 states have internal predecessors, (1439), 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) [2022-07-19 21:15:44,429 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:15:44,429 INFO L200 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:15:44,464 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-19 21:15:44,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-07-19 21:15:44,647 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:15:44,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:15:44,647 INFO L85 PathProgramCache]: Analyzing trace with hash -1793274580, now seen corresponding path program 1 times [2022-07-19 21:15:44,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:15:44,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377764428] [2022-07-19 21:15:44,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:15:44,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:15:44,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:15:44,672 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-19 21:15:44,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:15:44,690 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-19 21:15:44,690 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-19 21:15:44,690 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-19 21:15:44,690 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-19 21:15:44,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-07-19 21:15:44,691 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-07-19 21:15:44,691 WARN L231 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-19 21:15:44,691 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2022-07-19 21:15:44,702 INFO L135 ThreadInstanceAdder]: Constructed 6 joinOtherThreadTransitions. [2022-07-19 21:15:44,703 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 124 places, 123 transitions, 324 flow [2022-07-19 21:15:44,871 INFO L129 PetriNetUnfolder]: 399/2577 cut-off events. [2022-07-19 21:15:44,871 INFO L130 PetriNetUnfolder]: For 242/242 co-relation queries the response was YES. [2022-07-19 21:15:44,876 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2809 conditions, 2577 events. 399/2577 cut-off events. For 242/242 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 18431 event pairs, 72 based on Foata normal form. 0/2178 useless extension candidates. Maximal degree in co-relation 1426. Up to 192 conditions per place. [2022-07-19 21:15:44,877 INFO L82 GeneralOperation]: Start removeDead. Operand has 124 places, 123 transitions, 324 flow [2022-07-19 21:15:44,881 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 115 places, 113 transitions, 304 flow [2022-07-19 21:15:44,882 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:15:44,882 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=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@e1dbc24, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@745720f0 [2022-07-19 21:15:44,882 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-19 21:15:44,885 INFO L129 PetriNetUnfolder]: 6/74 cut-off events. [2022-07-19 21:15:44,885 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-19 21:15:44,885 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:15:44,885 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:15:44,885 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:15:44,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:15:44,885 INFO L85 PathProgramCache]: Analyzing trace with hash -2008124677, now seen corresponding path program 1 times [2022-07-19 21:15:44,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:15:44,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771226104] [2022-07-19 21:15:44,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:15:44,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:15:44,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:15:44,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:15:44,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:15:44,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771226104] [2022-07-19 21:15:44,895 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771226104] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:15:44,895 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:15:44,895 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 21:15:44,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970326032] [2022-07-19 21:15:44,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:15:44,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-19 21:15:44,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:15:44,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-19 21:15:44,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 21:15:44,911 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 123 [2022-07-19 21:15:44,912 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 113 transitions, 304 flow. Second operand has 2 states, 2 states have (on average 105.5) internal successors, (211), 2 states have internal predecessors, (211), 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) [2022-07-19 21:15:44,912 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:15:44,912 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 123 [2022-07-19 21:15:44,912 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:15:45,038 INFO L129 PetriNetUnfolder]: 199/1801 cut-off events. [2022-07-19 21:15:45,039 INFO L130 PetriNetUnfolder]: For 647/647 co-relation queries the response was YES. [2022-07-19 21:15:45,043 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2232 conditions, 1801 events. 199/1801 cut-off events. For 647/647 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 12279 event pairs, 72 based on Foata normal form. 136/1801 useless extension candidates. Maximal degree in co-relation 1120. Up to 199 conditions per place. [2022-07-19 21:15:45,047 INFO L132 encePairwiseOnDemand]: 119/123 looper letters, 12 selfloop transitions, 0 changer transitions 1/109 dead transitions. [2022-07-19 21:15:45,047 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 109 transitions, 320 flow [2022-07-19 21:15:45,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-19 21:15:45,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-19 21:15:45,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 226 transitions. [2022-07-19 21:15:45,048 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9186991869918699 [2022-07-19 21:15:45,048 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 226 transitions. [2022-07-19 21:15:45,049 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 226 transitions. [2022-07-19 21:15:45,049 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:15:45,049 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 226 transitions. [2022-07-19 21:15:45,049 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 113.0) internal successors, (226), 2 states have internal predecessors, (226), 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) [2022-07-19 21:15:45,050 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 123.0) internal successors, (369), 3 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) [2022-07-19 21:15:45,050 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 123.0) internal successors, (369), 3 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) [2022-07-19 21:15:45,050 INFO L186 Difference]: Start difference. First operand has 115 places, 113 transitions, 304 flow. Second operand 2 states and 226 transitions. [2022-07-19 21:15:45,050 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 109 transitions, 320 flow [2022-07-19 21:15:45,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 109 transitions, 320 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-19 21:15:45,053 INFO L242 Difference]: Finished difference. Result has 116 places, 108 transitions, 294 flow [2022-07-19 21:15:45,054 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=123, PETRI_DIFFERENCE_MINUEND_FLOW=296, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=294, PETRI_PLACES=116, PETRI_TRANSITIONS=108} [2022-07-19 21:15:45,054 INFO L279 CegarLoopForPetriNet]: 115 programPoint places, 1 predicate places. [2022-07-19 21:15:45,054 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 108 transitions, 294 flow [2022-07-19 21:15:45,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 105.5) internal successors, (211), 2 states have internal predecessors, (211), 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) [2022-07-19 21:15:45,054 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:15:45,055 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:15:45,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-07-19 21:15:45,055 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:15:45,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:15:45,055 INFO L85 PathProgramCache]: Analyzing trace with hash 2090329114, now seen corresponding path program 1 times [2022-07-19 21:15:45,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:15:45,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730876046] [2022-07-19 21:15:45,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:15:45,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:15:45,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:15:45,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:15:45,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:15:45,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730876046] [2022-07-19 21:15:45,100 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730876046] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:15:45,100 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:15:45,100 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-19 21:15:45,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444650865] [2022-07-19 21:15:45,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:15:45,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-19 21:15:45,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:15:45,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-19 21:15:45,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-07-19 21:15:45,101 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 123 [2022-07-19 21:15:45,102 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 108 transitions, 294 flow. Second operand has 6 states, 6 states have (on average 81.16666666666667) internal successors, (487), 6 states have internal predecessors, (487), 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) [2022-07-19 21:15:45,102 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:15:45,102 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 123 [2022-07-19 21:15:45,102 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:15:45,331 INFO L129 PetriNetUnfolder]: 207/2229 cut-off events. [2022-07-19 21:15:45,332 INFO L130 PetriNetUnfolder]: For 257/257 co-relation queries the response was YES. [2022-07-19 21:15:45,337 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3724 conditions, 2229 events. 207/2229 cut-off events. For 257/257 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 16962 event pairs, 30 based on Foata normal form. 0/2097 useless extension candidates. Maximal degree in co-relation 3715. Up to 923 conditions per place. [2022-07-19 21:15:45,341 INFO L132 encePairwiseOnDemand]: 111/123 looper letters, 46 selfloop transitions, 9 changer transitions 0/126 dead transitions. [2022-07-19 21:15:45,342 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 126 transitions, 458 flow [2022-07-19 21:15:45,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-19 21:15:45,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-19 21:15:45,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 532 transitions. [2022-07-19 21:15:45,343 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7208672086720868 [2022-07-19 21:15:45,343 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 532 transitions. [2022-07-19 21:15:45,343 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 532 transitions. [2022-07-19 21:15:45,344 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:15:45,344 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 532 transitions. [2022-07-19 21:15:45,345 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 88.66666666666667) internal successors, (532), 6 states have internal predecessors, (532), 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) [2022-07-19 21:15:45,345 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 123.0) internal successors, (861), 7 states have internal predecessors, (861), 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) [2022-07-19 21:15:45,346 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 123.0) internal successors, (861), 7 states have internal predecessors, (861), 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) [2022-07-19 21:15:45,346 INFO L186 Difference]: Start difference. First operand has 116 places, 108 transitions, 294 flow. Second operand 6 states and 532 transitions. [2022-07-19 21:15:45,346 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 126 transitions, 458 flow [2022-07-19 21:15:45,347 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 126 transitions, 458 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-19 21:15:45,348 INFO L242 Difference]: Finished difference. Result has 121 places, 111 transitions, 336 flow [2022-07-19 21:15:45,348 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=123, PETRI_DIFFERENCE_MINUEND_FLOW=294, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=336, PETRI_PLACES=121, PETRI_TRANSITIONS=111} [2022-07-19 21:15:45,348 INFO L279 CegarLoopForPetriNet]: 115 programPoint places, 6 predicate places. [2022-07-19 21:15:45,349 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 111 transitions, 336 flow [2022-07-19 21:15:45,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 81.16666666666667) internal successors, (487), 6 states have internal predecessors, (487), 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) [2022-07-19 21:15:45,349 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:15:45,349 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:15:45,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-07-19 21:15:45,349 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:15:45,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:15:45,350 INFO L85 PathProgramCache]: Analyzing trace with hash 1136105305, now seen corresponding path program 1 times [2022-07-19 21:15:45,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:15:45,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983889540] [2022-07-19 21:15:45,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:15:45,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:15:45,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:15:45,424 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 21:15:45,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:15:45,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983889540] [2022-07-19 21:15:45,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983889540] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:15:45,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45874329] [2022-07-19 21:15:45,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:15:45,425 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:15:45,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:15:45,426 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:15:45,450 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-19 21:15:45,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:15:45,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-19 21:15:45,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:15:45,643 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 21:15:45,643 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:15:45,725 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 21:15:45,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [45874329] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:15:45,725 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:15:45,725 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2022-07-19 21:15:45,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544988117] [2022-07-19 21:15:45,726 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:15:45,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-19 21:15:45,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:15:45,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-19 21:15:45,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=240, Unknown=0, NotChecked=0, Total=342 [2022-07-19 21:15:45,728 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 123 [2022-07-19 21:15:45,729 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 111 transitions, 336 flow. Second operand has 19 states, 19 states have (on average 80.73684210526316) internal successors, (1534), 19 states have internal predecessors, (1534), 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) [2022-07-19 21:15:45,729 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:15:45,729 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 123 [2022-07-19 21:15:45,729 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:15:46,230 INFO L129 PetriNetUnfolder]: 204/2209 cut-off events. [2022-07-19 21:15:46,230 INFO L130 PetriNetUnfolder]: For 573/573 co-relation queries the response was YES. [2022-07-19 21:15:46,236 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4182 conditions, 2209 events. 204/2209 cut-off events. For 573/573 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 17106 event pairs, 31 based on Foata normal form. 2/2211 useless extension candidates. Maximal degree in co-relation 4171. Up to 577 conditions per place. [2022-07-19 21:15:46,242 INFO L132 encePairwiseOnDemand]: 108/123 looper letters, 43 selfloop transitions, 20 changer transitions 0/133 dead transitions. [2022-07-19 21:15:46,242 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 133 transitions, 526 flow [2022-07-19 21:15:46,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-19 21:15:46,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-07-19 21:15:46,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1001 transitions. [2022-07-19 21:15:46,244 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6781842818428184 [2022-07-19 21:15:46,244 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1001 transitions. [2022-07-19 21:15:46,244 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1001 transitions. [2022-07-19 21:15:46,245 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:15:46,245 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1001 transitions. [2022-07-19 21:15:46,279 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 83.41666666666667) internal successors, (1001), 12 states have internal predecessors, (1001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:15:46,281 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 123.0) internal successors, (1599), 13 states have internal predecessors, (1599), 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) [2022-07-19 21:15:46,281 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 123.0) internal successors, (1599), 13 states have internal predecessors, (1599), 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) [2022-07-19 21:15:46,282 INFO L186 Difference]: Start difference. First operand has 121 places, 111 transitions, 336 flow. Second operand 12 states and 1001 transitions. [2022-07-19 21:15:46,282 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 133 transitions, 526 flow [2022-07-19 21:15:46,284 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 133 transitions, 514 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-07-19 21:15:46,285 INFO L242 Difference]: Finished difference. Result has 131 places, 119 transitions, 417 flow [2022-07-19 21:15:46,285 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=123, PETRI_DIFFERENCE_MINUEND_FLOW=324, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=417, PETRI_PLACES=131, PETRI_TRANSITIONS=119} [2022-07-19 21:15:46,286 INFO L279 CegarLoopForPetriNet]: 115 programPoint places, 16 predicate places. [2022-07-19 21:15:46,286 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 119 transitions, 417 flow [2022-07-19 21:15:46,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 80.73684210526316) internal successors, (1534), 19 states have internal predecessors, (1534), 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) [2022-07-19 21:15:46,287 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:15:46,287 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:15:46,305 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-07-19 21:15:46,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:15:46,504 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:15:46,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:15:46,504 INFO L85 PathProgramCache]: Analyzing trace with hash -86842844, now seen corresponding path program 1 times [2022-07-19 21:15:46,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:15:46,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29433013] [2022-07-19 21:15:46,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:15:46,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:15:46,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:15:46,584 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 21:15:46,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:15:46,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29433013] [2022-07-19 21:15:46,585 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29433013] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:15:46,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299569653] [2022-07-19 21:15:46,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:15:46,585 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:15:46,586 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:15:46,587 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:15:46,588 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-19 21:15:46,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:15:46,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-19 21:15:46,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:15:46,776 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 21:15:46,777 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:15:46,877 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 21:15:46,877 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [299569653] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:15:46,878 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:15:46,878 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2022-07-19 21:15:46,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498598229] [2022-07-19 21:15:46,878 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:15:46,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-19 21:15:46,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:15:46,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-19 21:15:46,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2022-07-19 21:15:46,880 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 123 [2022-07-19 21:15:46,882 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 119 transitions, 417 flow. Second operand has 21 states, 21 states have (on average 84.57142857142857) internal successors, (1776), 21 states have internal predecessors, (1776), 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) [2022-07-19 21:15:46,882 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:15:46,882 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 123 [2022-07-19 21:15:46,882 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:15:47,378 INFO L129 PetriNetUnfolder]: 209/1895 cut-off events. [2022-07-19 21:15:47,379 INFO L130 PetriNetUnfolder]: For 1240/1240 co-relation queries the response was YES. [2022-07-19 21:15:47,381 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4470 conditions, 1895 events. 209/1895 cut-off events. For 1240/1240 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 14164 event pairs, 8 based on Foata normal form. 52/1947 useless extension candidates. Maximal degree in co-relation 4456. Up to 491 conditions per place. [2022-07-19 21:15:47,387 INFO L132 encePairwiseOnDemand]: 108/123 looper letters, 45 selfloop transitions, 29 changer transitions 0/146 dead transitions. [2022-07-19 21:15:47,387 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 146 transitions, 673 flow [2022-07-19 21:15:47,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-19 21:15:47,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2022-07-19 21:15:47,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1939 transitions. [2022-07-19 21:15:47,392 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6854012018381054 [2022-07-19 21:15:47,392 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1939 transitions. [2022-07-19 21:15:47,392 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1939 transitions. [2022-07-19 21:15:47,394 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:15:47,394 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1939 transitions. [2022-07-19 21:15:47,398 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 84.30434782608695) internal successors, (1939), 23 states have internal predecessors, (1939), 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) [2022-07-19 21:15:47,407 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 123.0) internal successors, (2952), 24 states have internal predecessors, (2952), 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) [2022-07-19 21:15:47,407 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 123.0) internal successors, (2952), 24 states have internal predecessors, (2952), 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) [2022-07-19 21:15:47,408 INFO L186 Difference]: Start difference. First operand has 131 places, 119 transitions, 417 flow. Second operand 23 states and 1939 transitions. [2022-07-19 21:15:47,408 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 146 transitions, 673 flow [2022-07-19 21:15:47,417 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 146 transitions, 652 flow, removed 5 selfloop flow, removed 4 redundant places. [2022-07-19 21:15:47,419 INFO L242 Difference]: Finished difference. Result has 150 places, 127 transitions, 497 flow [2022-07-19 21:15:47,419 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=123, PETRI_DIFFERENCE_MINUEND_FLOW=398, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=497, PETRI_PLACES=150, PETRI_TRANSITIONS=127} [2022-07-19 21:15:47,419 INFO L279 CegarLoopForPetriNet]: 115 programPoint places, 35 predicate places. [2022-07-19 21:15:47,420 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 127 transitions, 497 flow [2022-07-19 21:15:47,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 84.57142857142857) internal successors, (1776), 21 states have internal predecessors, (1776), 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) [2022-07-19 21:15:47,420 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:15:47,424 INFO L200 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:15:47,442 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-19 21:15:47,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:15:47,630 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:15:47,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:15:47,630 INFO L85 PathProgramCache]: Analyzing trace with hash 1969581107, now seen corresponding path program 1 times [2022-07-19 21:15:47,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:15:47,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164570722] [2022-07-19 21:15:47,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:15:47,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:15:47,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:15:47,648 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-19 21:15:47,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:15:47,677 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-19 21:15:47,677 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-19 21:15:47,678 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-19 21:15:47,678 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-19 21:15:47,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-07-19 21:15:47,678 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-07-19 21:15:47,680 WARN L231 ceAbstractionStarter]: 6 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-19 21:15:47,680 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 7 thread instances. [2022-07-19 21:15:47,700 INFO L135 ThreadInstanceAdder]: Constructed 7 joinOtherThreadTransitions. [2022-07-19 21:15:47,701 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 132 places, 130 transitions, 358 flow [2022-07-19 21:15:48,114 INFO L129 PetriNetUnfolder]: 849/5091 cut-off events. [2022-07-19 21:15:48,115 INFO L130 PetriNetUnfolder]: For 525/525 co-relation queries the response was YES. [2022-07-19 21:15:48,126 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5589 conditions, 5091 events. 849/5091 cut-off events. For 525/525 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 44043 event pairs, 201 based on Foata normal form. 0/4306 useless extension candidates. Maximal degree in co-relation 2795. Up to 448 conditions per place. [2022-07-19 21:15:48,126 INFO L82 GeneralOperation]: Start removeDead. Operand has 132 places, 130 transitions, 358 flow [2022-07-19 21:15:48,139 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 123 places, 120 transitions, 338 flow [2022-07-19 21:15:48,142 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:15:48,143 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@e1dbc24, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@745720f0 [2022-07-19 21:15:48,143 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-19 21:15:48,146 INFO L129 PetriNetUnfolder]: 6/74 cut-off events. [2022-07-19 21:15:48,146 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-19 21:15:48,146 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:15:48,147 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:15:48,147 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:15:48,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:15:48,148 INFO L85 PathProgramCache]: Analyzing trace with hash -503286084, now seen corresponding path program 1 times [2022-07-19 21:15:48,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:15:48,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580696107] [2022-07-19 21:15:48,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:15:48,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:15:48,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:15:48,157 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:15:48,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:15:48,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580696107] [2022-07-19 21:15:48,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580696107] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:15:48,157 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:15:48,158 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 21:15:48,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955625792] [2022-07-19 21:15:48,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:15:48,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-19 21:15:48,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:15:48,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-19 21:15:48,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 21:15:48,159 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 130 [2022-07-19 21:15:48,159 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 120 transitions, 338 flow. Second operand has 2 states, 2 states have (on average 111.0) internal successors, (222), 2 states have internal predecessors, (222), 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) [2022-07-19 21:15:48,159 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:15:48,159 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 130 [2022-07-19 21:15:48,159 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:15:48,434 INFO L129 PetriNetUnfolder]: 456/3546 cut-off events. [2022-07-19 21:15:48,434 INFO L130 PetriNetUnfolder]: For 1449/1449 co-relation queries the response was YES. [2022-07-19 21:15:48,441 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4500 conditions, 3546 events. 456/3546 cut-off events. For 1449/1449 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 29274 event pairs, 201 based on Foata normal form. 265/3546 useless extension candidates. Maximal degree in co-relation 2217. Up to 456 conditions per place. [2022-07-19 21:15:48,448 INFO L132 encePairwiseOnDemand]: 126/130 looper letters, 14 selfloop transitions, 0 changer transitions 1/116 dead transitions. [2022-07-19 21:15:48,448 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 116 transitions, 358 flow [2022-07-19 21:15:48,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-19 21:15:48,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-19 21:15:48,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 238 transitions. [2022-07-19 21:15:48,449 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9153846153846154 [2022-07-19 21:15:48,449 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 238 transitions. [2022-07-19 21:15:48,449 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 238 transitions. [2022-07-19 21:15:48,449 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:15:48,449 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 238 transitions. [2022-07-19 21:15:48,450 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 119.0) internal successors, (238), 2 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) [2022-07-19 21:15:48,450 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 130.0) internal successors, (390), 3 states have internal predecessors, (390), 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) [2022-07-19 21:15:48,450 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 130.0) internal successors, (390), 3 states have internal predecessors, (390), 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) [2022-07-19 21:15:48,450 INFO L186 Difference]: Start difference. First operand has 123 places, 120 transitions, 338 flow. Second operand 2 states and 238 transitions. [2022-07-19 21:15:48,451 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 116 transitions, 358 flow [2022-07-19 21:15:48,452 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 116 transitions, 358 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-19 21:15:48,453 INFO L242 Difference]: Finished difference. Result has 124 places, 115 transitions, 328 flow [2022-07-19 21:15:48,453 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=130, PETRI_DIFFERENCE_MINUEND_FLOW=330, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=328, PETRI_PLACES=124, PETRI_TRANSITIONS=115} [2022-07-19 21:15:48,453 INFO L279 CegarLoopForPetriNet]: 123 programPoint places, 1 predicate places. [2022-07-19 21:15:48,453 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 115 transitions, 328 flow [2022-07-19 21:15:48,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 111.0) internal successors, (222), 2 states have internal predecessors, (222), 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) [2022-07-19 21:15:48,454 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:15:48,454 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:15:48,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-07-19 21:15:48,454 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:15:48,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:15:48,454 INFO L85 PathProgramCache]: Analyzing trace with hash 513300316, now seen corresponding path program 1 times [2022-07-19 21:15:48,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:15:48,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274390595] [2022-07-19 21:15:48,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:15:48,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:15:48,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:15:48,513 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:15:48,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:15:48,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274390595] [2022-07-19 21:15:48,514 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274390595] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:15:48,514 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:15:48,514 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-19 21:15:48,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339735750] [2022-07-19 21:15:48,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:15:48,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-19 21:15:48,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:15:48,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-19 21:15:48,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-07-19 21:15:48,516 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 130 [2022-07-19 21:15:48,516 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 115 transitions, 328 flow. Second operand has 6 states, 6 states have (on average 86.16666666666667) internal successors, (517), 6 states have internal predecessors, (517), 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) [2022-07-19 21:15:48,516 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:15:48,516 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 130 [2022-07-19 21:15:48,517 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:15:49,028 INFO L129 PetriNetUnfolder]: 469/4384 cut-off events. [2022-07-19 21:15:49,028 INFO L130 PetriNetUnfolder]: For 546/546 co-relation queries the response was YES. [2022-07-19 21:15:49,041 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7394 conditions, 4384 events. 469/4384 cut-off events. For 546/546 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 39782 event pairs, 102 based on Foata normal form. 0/4123 useless extension candidates. Maximal degree in co-relation 7384. Up to 1893 conditions per place. [2022-07-19 21:15:49,049 INFO L132 encePairwiseOnDemand]: 118/130 looper letters, 49 selfloop transitions, 9 changer transitions 0/134 dead transitions. [2022-07-19 21:15:49,049 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 134 transitions, 503 flow [2022-07-19 21:15:49,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-19 21:15:49,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-19 21:15:49,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 565 transitions. [2022-07-19 21:15:49,051 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7243589743589743 [2022-07-19 21:15:49,051 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 565 transitions. [2022-07-19 21:15:49,051 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 565 transitions. [2022-07-19 21:15:49,051 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:15:49,052 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 565 transitions. [2022-07-19 21:15:49,052 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 94.16666666666667) internal successors, (565), 6 states have internal predecessors, (565), 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) [2022-07-19 21:15:49,053 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 130.0) internal successors, (910), 7 states have internal predecessors, (910), 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) [2022-07-19 21:15:49,054 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 130.0) internal successors, (910), 7 states have internal predecessors, (910), 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) [2022-07-19 21:15:49,054 INFO L186 Difference]: Start difference. First operand has 124 places, 115 transitions, 328 flow. Second operand 6 states and 565 transitions. [2022-07-19 21:15:49,054 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 134 transitions, 503 flow [2022-07-19 21:15:49,055 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 134 transitions, 503 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-19 21:15:49,056 INFO L242 Difference]: Finished difference. Result has 129 places, 118 transitions, 370 flow [2022-07-19 21:15:49,057 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=130, PETRI_DIFFERENCE_MINUEND_FLOW=328, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=370, PETRI_PLACES=129, PETRI_TRANSITIONS=118} [2022-07-19 21:15:49,057 INFO L279 CegarLoopForPetriNet]: 123 programPoint places, 6 predicate places. [2022-07-19 21:15:49,057 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 118 transitions, 370 flow [2022-07-19 21:15:49,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 86.16666666666667) internal successors, (517), 6 states have internal predecessors, (517), 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) [2022-07-19 21:15:49,057 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:15:49,058 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:15:49,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-07-19 21:15:49,058 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:15:49,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:15:49,058 INFO L85 PathProgramCache]: Analyzing trace with hash -199260274, now seen corresponding path program 1 times [2022-07-19 21:15:49,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:15:49,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566871776] [2022-07-19 21:15:49,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:15:49,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:15:49,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:15:49,131 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 21:15:49,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:15:49,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566871776] [2022-07-19 21:15:49,131 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566871776] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:15:49,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308557367] [2022-07-19 21:15:49,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:15:49,132 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:15:49,132 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:15:49,133 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:15:49,134 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-19 21:15:49,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:15:49,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-19 21:15:49,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:15:49,335 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 21:15:49,335 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:15:49,405 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 21:15:49,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1308557367] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:15:49,405 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:15:49,405 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2022-07-19 21:15:49,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004696432] [2022-07-19 21:15:49,405 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:15:49,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-19 21:15:49,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:15:49,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-19 21:15:49,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=240, Unknown=0, NotChecked=0, Total=342 [2022-07-19 21:15:49,407 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 130 [2022-07-19 21:15:49,408 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 118 transitions, 370 flow. Second operand has 19 states, 19 states have (on average 85.73684210526316) internal successors, (1629), 19 states have internal predecessors, (1629), 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) [2022-07-19 21:15:49,408 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:15:49,409 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 130 [2022-07-19 21:15:49,409 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:15:50,112 INFO L129 PetriNetUnfolder]: 466/4364 cut-off events. [2022-07-19 21:15:50,112 INFO L130 PetriNetUnfolder]: For 1182/1182 co-relation queries the response was YES. [2022-07-19 21:15:50,128 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8317 conditions, 4364 events. 466/4364 cut-off events. For 1182/1182 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 39996 event pairs, 103 based on Foata normal form. 2/4366 useless extension candidates. Maximal degree in co-relation 8305. Up to 1219 conditions per place. [2022-07-19 21:15:50,139 INFO L132 encePairwiseOnDemand]: 115/130 looper letters, 46 selfloop transitions, 20 changer transitions 0/141 dead transitions. [2022-07-19 21:15:50,139 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 141 transitions, 571 flow [2022-07-19 21:15:50,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-19 21:15:50,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-07-19 21:15:50,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1064 transitions. [2022-07-19 21:15:50,141 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6820512820512821 [2022-07-19 21:15:50,141 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1064 transitions. [2022-07-19 21:15:50,142 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1064 transitions. [2022-07-19 21:15:50,142 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:15:50,142 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1064 transitions. [2022-07-19 21:15:50,143 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 88.66666666666667) internal successors, (1064), 12 states have internal predecessors, (1064), 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) [2022-07-19 21:15:50,146 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 130.0) internal successors, (1690), 13 states have internal predecessors, (1690), 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) [2022-07-19 21:15:50,146 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 130.0) internal successors, (1690), 13 states have internal predecessors, (1690), 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) [2022-07-19 21:15:50,146 INFO L186 Difference]: Start difference. First operand has 129 places, 118 transitions, 370 flow. Second operand 12 states and 1064 transitions. [2022-07-19 21:15:50,146 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 141 transitions, 571 flow [2022-07-19 21:15:50,149 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 141 transitions, 559 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-07-19 21:15:50,151 INFO L242 Difference]: Finished difference. Result has 139 places, 126 transitions, 451 flow [2022-07-19 21:15:50,151 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=130, PETRI_DIFFERENCE_MINUEND_FLOW=358, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=451, PETRI_PLACES=139, PETRI_TRANSITIONS=126} [2022-07-19 21:15:50,151 INFO L279 CegarLoopForPetriNet]: 123 programPoint places, 16 predicate places. [2022-07-19 21:15:50,151 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 126 transitions, 451 flow [2022-07-19 21:15:50,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 85.73684210526316) internal successors, (1629), 19 states have internal predecessors, (1629), 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) [2022-07-19 21:15:50,152 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:15:50,152 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:15:50,168 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-19 21:15:50,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-07-19 21:15:50,369 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:15:50,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:15:50,369 INFO L85 PathProgramCache]: Analyzing trace with hash -1937108701, now seen corresponding path program 1 times [2022-07-19 21:15:50,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:15:50,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538377754] [2022-07-19 21:15:50,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:15:50,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:15:50,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:15:50,446 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 21:15:50,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:15:50,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538377754] [2022-07-19 21:15:50,446 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538377754] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:15:50,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418862834] [2022-07-19 21:15:50,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:15:50,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:15:50,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:15:50,448 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:15:50,449 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-19 21:15:50,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:15:50,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-19 21:15:50,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:15:50,652 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 21:15:50,652 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:15:50,759 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 21:15:50,759 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [418862834] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:15:50,759 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:15:50,759 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2022-07-19 21:15:50,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871226839] [2022-07-19 21:15:50,759 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:15:50,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-19 21:15:50,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:15:50,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-19 21:15:50,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2022-07-19 21:15:50,761 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 130 [2022-07-19 21:15:50,762 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 126 transitions, 451 flow. Second operand has 21 states, 21 states have (on average 89.57142857142857) internal successors, (1881), 21 states have internal predecessors, (1881), 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) [2022-07-19 21:15:50,762 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:15:50,762 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 130 [2022-07-19 21:15:50,762 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:15:51,543 INFO L129 PetriNetUnfolder]: 488/4012 cut-off events. [2022-07-19 21:15:51,543 INFO L130 PetriNetUnfolder]: For 2645/2645 co-relation queries the response was YES. [2022-07-19 21:15:51,555 INFO L84 FinitePrefix]: Finished finitePrefix Result has 9401 conditions, 4012 events. 488/4012 cut-off events. For 2645/2645 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 36747 event pairs, 38 based on Foata normal form. 80/4092 useless extension candidates. Maximal degree in co-relation 9386. Up to 1124 conditions per place. [2022-07-19 21:15:51,563 INFO L132 encePairwiseOnDemand]: 115/130 looper letters, 49 selfloop transitions, 29 changer transitions 0/155 dead transitions. [2022-07-19 21:15:51,563 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 155 transitions, 725 flow [2022-07-19 21:15:51,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-19 21:15:51,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2022-07-19 21:15:51,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 2058 transitions. [2022-07-19 21:15:51,567 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6882943143812709 [2022-07-19 21:15:51,567 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 2058 transitions. [2022-07-19 21:15:51,567 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 2058 transitions. [2022-07-19 21:15:51,569 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:15:51,569 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 2058 transitions. [2022-07-19 21:15:51,576 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 89.47826086956522) internal successors, (2058), 23 states have internal predecessors, (2058), 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) [2022-07-19 21:15:51,580 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 130.0) internal successors, (3120), 24 states have internal predecessors, (3120), 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) [2022-07-19 21:15:51,580 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 130.0) internal successors, (3120), 24 states have internal predecessors, (3120), 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) [2022-07-19 21:15:51,580 INFO L186 Difference]: Start difference. First operand has 139 places, 126 transitions, 451 flow. Second operand 23 states and 2058 transitions. [2022-07-19 21:15:51,580 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 155 transitions, 725 flow [2022-07-19 21:15:51,587 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 155 transitions, 704 flow, removed 5 selfloop flow, removed 4 redundant places. [2022-07-19 21:15:51,588 INFO L242 Difference]: Finished difference. Result has 158 places, 134 transitions, 531 flow [2022-07-19 21:15:51,589 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=130, PETRI_DIFFERENCE_MINUEND_FLOW=432, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=531, PETRI_PLACES=158, PETRI_TRANSITIONS=134} [2022-07-19 21:15:51,589 INFO L279 CegarLoopForPetriNet]: 123 programPoint places, 35 predicate places. [2022-07-19 21:15:51,589 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 134 transitions, 531 flow [2022-07-19 21:15:51,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 89.57142857142857) internal successors, (1881), 21 states have internal predecessors, (1881), 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) [2022-07-19 21:15:51,591 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:15:51,591 INFO L200 CegarLoopForPetriNet]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:15:51,611 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-19 21:15:51,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-07-19 21:15:51,809 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:15:51,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:15:51,809 INFO L85 PathProgramCache]: Analyzing trace with hash 204495269, now seen corresponding path program 1 times [2022-07-19 21:15:51,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:15:51,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156195484] [2022-07-19 21:15:51,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:15:51,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:15:51,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:15:51,826 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-19 21:15:51,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:15:51,851 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-19 21:15:51,851 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-19 21:15:51,851 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-19 21:15:51,851 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-19 21:15:51,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-07-19 21:15:51,851 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-07-19 21:15:51,852 WARN L231 ceAbstractionStarter]: 7 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-19 21:15:51,852 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 8 thread instances. [2022-07-19 21:15:51,867 INFO L135 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2022-07-19 21:15:51,868 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 140 places, 137 transitions, 394 flow [2022-07-19 21:15:52,714 INFO L129 PetriNetUnfolder]: 1811/10165 cut-off events. [2022-07-19 21:15:52,714 INFO L130 PetriNetUnfolder]: For 1136/1136 co-relation queries the response was YES. [2022-07-19 21:15:52,740 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11250 conditions, 10165 events. 1811/10165 cut-off events. For 1136/1136 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 102311 event pairs, 522 based on Foata normal form. 0/8610 useless extension candidates. Maximal degree in co-relation 5573. Up to 1024 conditions per place. [2022-07-19 21:15:52,740 INFO L82 GeneralOperation]: Start removeDead. Operand has 140 places, 137 transitions, 394 flow [2022-07-19 21:15:52,757 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 131 places, 127 transitions, 374 flow [2022-07-19 21:15:52,758 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:15:52,758 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@e1dbc24, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@745720f0 [2022-07-19 21:15:52,758 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-19 21:15:52,761 INFO L129 PetriNetUnfolder]: 6/74 cut-off events. [2022-07-19 21:15:52,761 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-19 21:15:52,761 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:15:52,761 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:15:52,761 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:15:52,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:15:52,762 INFO L85 PathProgramCache]: Analyzing trace with hash -1378558521, now seen corresponding path program 1 times [2022-07-19 21:15:52,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:15:52,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985882476] [2022-07-19 21:15:52,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:15:52,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:15:52,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:15:52,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:15:52,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:15:52,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985882476] [2022-07-19 21:15:52,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985882476] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:15:52,799 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:15:52,799 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 21:15:52,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869944886] [2022-07-19 21:15:52,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:15:52,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-19 21:15:52,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:15:52,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-19 21:15:52,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 21:15:52,801 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 137 [2022-07-19 21:15:52,801 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 127 transitions, 374 flow. Second operand has 2 states, 2 states have (on average 116.0) internal successors, (232), 2 states have internal predecessors, (232), 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) [2022-07-19 21:15:52,801 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:15:52,801 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 137 [2022-07-19 21:15:52,801 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:15:53,404 INFO L129 PetriNetUnfolder]: 1033/7083 cut-off events. [2022-07-19 21:15:53,404 INFO L130 PetriNetUnfolder]: For 3220/3220 co-relation queries the response was YES. [2022-07-19 21:15:53,428 INFO L84 FinitePrefix]: Finished finitePrefix Result has 9201 conditions, 7083 events. 1033/7083 cut-off events. For 3220/3220 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 69209 event pairs, 522 based on Foata normal form. 522/7083 useless extension candidates. Maximal degree in co-relation 4483. Up to 1033 conditions per place. [2022-07-19 21:15:53,441 INFO L132 encePairwiseOnDemand]: 133/137 looper letters, 16 selfloop transitions, 0 changer transitions 1/123 dead transitions. [2022-07-19 21:15:53,441 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 123 transitions, 398 flow [2022-07-19 21:15:53,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-19 21:15:53,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-19 21:15:53,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 250 transitions. [2022-07-19 21:15:53,442 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9124087591240876 [2022-07-19 21:15:53,442 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 250 transitions. [2022-07-19 21:15:53,442 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 250 transitions. [2022-07-19 21:15:53,442 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:15:53,442 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 250 transitions. [2022-07-19 21:15:53,443 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 125.0) internal successors, (250), 2 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:15:53,443 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 137.0) internal successors, (411), 3 states have internal predecessors, (411), 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) [2022-07-19 21:15:53,443 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 137.0) internal successors, (411), 3 states have internal predecessors, (411), 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) [2022-07-19 21:15:53,443 INFO L186 Difference]: Start difference. First operand has 131 places, 127 transitions, 374 flow. Second operand 2 states and 250 transitions. [2022-07-19 21:15:53,443 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 123 transitions, 398 flow [2022-07-19 21:15:53,444 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 123 transitions, 398 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-19 21:15:53,445 INFO L242 Difference]: Finished difference. Result has 132 places, 122 transitions, 364 flow [2022-07-19 21:15:53,445 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=366, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=364, PETRI_PLACES=132, PETRI_TRANSITIONS=122} [2022-07-19 21:15:53,446 INFO L279 CegarLoopForPetriNet]: 131 programPoint places, 1 predicate places. [2022-07-19 21:15:53,446 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 122 transitions, 364 flow [2022-07-19 21:15:53,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 116.0) internal successors, (232), 2 states have internal predecessors, (232), 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) [2022-07-19 21:15:53,446 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:15:53,446 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:15:53,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-07-19 21:15:53,446 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:15:53,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:15:53,446 INFO L85 PathProgramCache]: Analyzing trace with hash -1445989307, now seen corresponding path program 1 times [2022-07-19 21:15:53,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:15:53,446 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309036428] [2022-07-19 21:15:53,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:15:53,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:15:53,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:15:53,493 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:15:53,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:15:53,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309036428] [2022-07-19 21:15:53,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309036428] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:15:53,494 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:15:53,494 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-19 21:15:53,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378729178] [2022-07-19 21:15:53,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:15:53,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-19 21:15:53,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:15:53,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-19 21:15:53,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-07-19 21:15:53,495 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 137 [2022-07-19 21:15:53,495 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 122 transitions, 364 flow. Second operand has 6 states, 6 states have (on average 91.16666666666667) internal successors, (547), 6 states have internal predecessors, (547), 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) [2022-07-19 21:15:53,495 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:15:53,495 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 137 [2022-07-19 21:15:53,495 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:15:54,566 INFO L129 PetriNetUnfolder]: 1052/8719 cut-off events. [2022-07-19 21:15:54,567 INFO L130 PetriNetUnfolder]: For 1164/1164 co-relation queries the response was YES. [2022-07-19 21:15:54,601 INFO L84 FinitePrefix]: Finished finitePrefix Result has 14849 conditions, 8719 events. 1052/8719 cut-off events. For 1164/1164 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 91741 event pairs, 303 based on Foata normal form. 0/8201 useless extension candidates. Maximal degree in co-relation 14838. Up to 3888 conditions per place. [2022-07-19 21:15:54,623 INFO L132 encePairwiseOnDemand]: 125/137 looper letters, 52 selfloop transitions, 9 changer transitions 0/142 dead transitions. [2022-07-19 21:15:54,623 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 142 transitions, 550 flow [2022-07-19 21:15:54,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-19 21:15:54,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-19 21:15:54,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 598 transitions. [2022-07-19 21:15:54,625 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7274939172749392 [2022-07-19 21:15:54,626 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 598 transitions. [2022-07-19 21:15:54,626 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 598 transitions. [2022-07-19 21:15:54,626 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:15:54,626 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 598 transitions. [2022-07-19 21:15:54,627 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 99.66666666666667) internal successors, (598), 6 states have internal predecessors, (598), 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) [2022-07-19 21:15:54,629 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 137.0) internal successors, (959), 7 states have internal predecessors, (959), 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) [2022-07-19 21:15:54,629 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 137.0) internal successors, (959), 7 states have internal predecessors, (959), 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) [2022-07-19 21:15:54,629 INFO L186 Difference]: Start difference. First operand has 132 places, 122 transitions, 364 flow. Second operand 6 states and 598 transitions. [2022-07-19 21:15:54,629 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 142 transitions, 550 flow [2022-07-19 21:15:54,631 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 142 transitions, 550 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-19 21:15:54,633 INFO L242 Difference]: Finished difference. Result has 137 places, 125 transitions, 406 flow [2022-07-19 21:15:54,633 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=364, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=406, PETRI_PLACES=137, PETRI_TRANSITIONS=125} [2022-07-19 21:15:54,634 INFO L279 CegarLoopForPetriNet]: 131 programPoint places, 6 predicate places. [2022-07-19 21:15:54,634 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 125 transitions, 406 flow [2022-07-19 21:15:54,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 91.16666666666667) internal successors, (547), 6 states have internal predecessors, (547), 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) [2022-07-19 21:15:54,634 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:15:54,634 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:15:54,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-07-19 21:15:54,635 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:15:54,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:15:54,635 INFO L85 PathProgramCache]: Analyzing trace with hash 1355647550, now seen corresponding path program 1 times [2022-07-19 21:15:54,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:15:54,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489696463] [2022-07-19 21:15:54,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:15:54,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:15:54,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:15:54,719 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 21:15:54,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:15:54,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489696463] [2022-07-19 21:15:54,719 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489696463] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:15:54,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626348148] [2022-07-19 21:15:54,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:15:54,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:15:54,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:15:54,721 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:15:54,723 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-19 21:15:54,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:15:54,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-19 21:15:54,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:15:54,965 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 21:15:54,965 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:15:55,036 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 21:15:55,037 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1626348148] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:15:55,037 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:15:55,037 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2022-07-19 21:15:55,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934992207] [2022-07-19 21:15:55,037 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:15:55,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-19 21:15:55,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:15:55,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-19 21:15:55,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=240, Unknown=0, NotChecked=0, Total=342 [2022-07-19 21:15:55,041 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 137 [2022-07-19 21:15:55,042 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 125 transitions, 406 flow. Second operand has 19 states, 19 states have (on average 90.73684210526316) internal successors, (1724), 19 states have internal predecessors, (1724), 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) [2022-07-19 21:15:55,042 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:15:55,042 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 137 [2022-07-19 21:15:55,042 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:15:56,281 INFO L129 PetriNetUnfolder]: 1049/8699 cut-off events. [2022-07-19 21:15:56,281 INFO L130 PetriNetUnfolder]: For 2440/2440 co-relation queries the response was YES. [2022-07-19 21:15:56,317 INFO L84 FinitePrefix]: Finished finitePrefix Result has 16687 conditions, 8699 events. 1049/8699 cut-off events. For 2440/2440 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 92146 event pairs, 304 based on Foata normal form. 2/8701 useless extension candidates. Maximal degree in co-relation 16674. Up to 2565 conditions per place. [2022-07-19 21:15:56,334 INFO L132 encePairwiseOnDemand]: 122/137 looper letters, 49 selfloop transitions, 20 changer transitions 0/149 dead transitions. [2022-07-19 21:15:56,334 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 149 transitions, 618 flow [2022-07-19 21:15:56,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-19 21:15:56,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-07-19 21:15:56,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1127 transitions. [2022-07-19 21:15:56,335 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6855231143552312 [2022-07-19 21:15:56,335 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1127 transitions. [2022-07-19 21:15:56,336 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1127 transitions. [2022-07-19 21:15:56,336 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:15:56,336 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1127 transitions. [2022-07-19 21:15:56,337 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 93.91666666666667) internal successors, (1127), 12 states have internal predecessors, (1127), 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) [2022-07-19 21:15:56,338 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 137.0) internal successors, (1781), 13 states have internal predecessors, (1781), 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) [2022-07-19 21:15:56,338 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 137.0) internal successors, (1781), 13 states have internal predecessors, (1781), 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) [2022-07-19 21:15:56,338 INFO L186 Difference]: Start difference. First operand has 137 places, 125 transitions, 406 flow. Second operand 12 states and 1127 transitions. [2022-07-19 21:15:56,338 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 149 transitions, 618 flow [2022-07-19 21:15:56,343 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 149 transitions, 606 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-07-19 21:15:56,344 INFO L242 Difference]: Finished difference. Result has 147 places, 133 transitions, 487 flow [2022-07-19 21:15:56,344 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=394, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=487, PETRI_PLACES=147, PETRI_TRANSITIONS=133} [2022-07-19 21:15:56,344 INFO L279 CegarLoopForPetriNet]: 131 programPoint places, 16 predicate places. [2022-07-19 21:15:56,344 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 133 transitions, 487 flow [2022-07-19 21:15:56,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 90.73684210526316) internal successors, (1724), 19 states have internal predecessors, (1724), 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) [2022-07-19 21:15:56,345 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:15:56,345 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:15:56,364 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-19 21:15:56,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:15:56,560 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:15:56,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:15:56,560 INFO L85 PathProgramCache]: Analyzing trace with hash 224936797, now seen corresponding path program 1 times [2022-07-19 21:15:56,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:15:56,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119079796] [2022-07-19 21:15:56,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:15:56,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:15:56,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:15:56,646 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 21:15:56,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:15:56,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119079796] [2022-07-19 21:15:56,647 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119079796] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:15:56,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858139194] [2022-07-19 21:15:56,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:15:56,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:15:56,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:15:56,664 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:15:56,682 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-19 21:15:56,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:15:56,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-19 21:15:56,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:15:56,892 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 21:15:56,893 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:15:56,993 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 21:15:56,993 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1858139194] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:15:56,994 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:15:56,994 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2022-07-19 21:15:56,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415655439] [2022-07-19 21:15:56,994 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:15:56,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-19 21:15:56,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:15:56,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-19 21:15:56,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2022-07-19 21:15:56,996 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 137 [2022-07-19 21:15:57,037 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 133 transitions, 487 flow. Second operand has 21 states, 21 states have (on average 94.57142857142857) internal successors, (1986), 21 states have internal predecessors, (1986), 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) [2022-07-19 21:15:57,037 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:15:57,037 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 137 [2022-07-19 21:15:57,037 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:15:58,277 INFO L129 PetriNetUnfolder]: 1098/8331 cut-off events. [2022-07-19 21:15:58,278 INFO L130 PetriNetUnfolder]: For 5494/5494 co-relation queries the response was YES. [2022-07-19 21:15:58,334 INFO L84 FinitePrefix]: Finished finitePrefix Result has 19416 conditions, 8331 events. 1098/8331 cut-off events. For 5494/5494 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 89538 event pairs, 140 based on Foata normal form. 116/8447 useless extension candidates. Maximal degree in co-relation 19400. Up to 2468 conditions per place. [2022-07-19 21:15:58,354 INFO L132 encePairwiseOnDemand]: 122/137 looper letters, 53 selfloop transitions, 29 changer transitions 0/164 dead transitions. [2022-07-19 21:15:58,355 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 164 transitions, 779 flow [2022-07-19 21:15:58,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-19 21:15:58,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2022-07-19 21:15:58,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 2177 transitions. [2022-07-19 21:15:58,358 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6908917803871787 [2022-07-19 21:15:58,358 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 2177 transitions. [2022-07-19 21:15:58,365 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 2177 transitions. [2022-07-19 21:15:58,366 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:15:58,366 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 2177 transitions. [2022-07-19 21:15:58,368 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 94.65217391304348) internal successors, (2177), 23 states have internal predecessors, (2177), 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) [2022-07-19 21:15:58,371 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 137.0) internal successors, (3288), 24 states have internal predecessors, (3288), 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) [2022-07-19 21:15:58,371 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 137.0) internal successors, (3288), 24 states have internal predecessors, (3288), 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) [2022-07-19 21:15:58,371 INFO L186 Difference]: Start difference. First operand has 147 places, 133 transitions, 487 flow. Second operand 23 states and 2177 transitions. [2022-07-19 21:15:58,371 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 164 transitions, 779 flow [2022-07-19 21:15:58,383 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 164 transitions, 758 flow, removed 5 selfloop flow, removed 4 redundant places. [2022-07-19 21:15:58,385 INFO L242 Difference]: Finished difference. Result has 166 places, 141 transitions, 567 flow [2022-07-19 21:15:58,385 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=468, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=567, PETRI_PLACES=166, PETRI_TRANSITIONS=141} [2022-07-19 21:15:58,385 INFO L279 CegarLoopForPetriNet]: 131 programPoint places, 35 predicate places. [2022-07-19 21:15:58,385 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 141 transitions, 567 flow [2022-07-19 21:15:58,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 94.57142857142857) internal successors, (1986), 21 states have internal predecessors, (1986), 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) [2022-07-19 21:15:58,386 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:15:58,386 INFO L200 CegarLoopForPetriNet]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:15:58,403 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-07-19 21:15:58,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2022-07-19 21:15:58,602 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:15:58,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:15:58,603 INFO L85 PathProgramCache]: Analyzing trace with hash -523637086, now seen corresponding path program 1 times [2022-07-19 21:15:58,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:15:58,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870663457] [2022-07-19 21:15:58,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:15:58,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:15:58,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:15:58,618 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-19 21:15:58,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:15:58,656 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-19 21:15:58,656 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-19 21:15:58,656 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-19 21:15:58,656 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-19 21:15:58,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-07-19 21:15:58,657 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-07-19 21:15:58,657 WARN L231 ceAbstractionStarter]: 8 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-19 21:15:58,657 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 9 thread instances. [2022-07-19 21:15:58,675 INFO L135 ThreadInstanceAdder]: Constructed 9 joinOtherThreadTransitions. [2022-07-19 21:15:58,676 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 148 places, 144 transitions, 432 flow [2022-07-19 21:16:00,365 INFO L129 PetriNetUnfolder]: 3861/20423 cut-off events. [2022-07-19 21:16:00,365 INFO L130 PetriNetUnfolder]: For 2460/2460 co-relation queries the response was YES. [2022-07-19 21:16:00,418 INFO L84 FinitePrefix]: Finished finitePrefix Result has 22800 conditions, 20423 events. 3861/20423 cut-off events. For 2460/2460 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 234703 event pairs, 1291 based on Foata normal form. 0/17330 useless extension candidates. Maximal degree in co-relation 11232. Up to 2304 conditions per place. [2022-07-19 21:16:00,419 INFO L82 GeneralOperation]: Start removeDead. Operand has 148 places, 144 transitions, 432 flow [2022-07-19 21:16:00,453 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 139 places, 134 transitions, 412 flow [2022-07-19 21:16:00,454 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:16:00,455 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=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@e1dbc24, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@745720f0 [2022-07-19 21:16:00,455 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-19 21:16:00,457 INFO L129 PetriNetUnfolder]: 6/74 cut-off events. [2022-07-19 21:16:00,458 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-19 21:16:00,458 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:16:00,458 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:16:00,458 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:16:00,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:16:00,458 INFO L85 PathProgramCache]: Analyzing trace with hash -183562635, now seen corresponding path program 1 times [2022-07-19 21:16:00,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:16:00,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311389024] [2022-07-19 21:16:00,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:16:00,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:16:00,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:16:00,469 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:16:00,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:16:00,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311389024] [2022-07-19 21:16:00,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311389024] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:16:00,470 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:16:00,470 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 21:16:00,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873025240] [2022-07-19 21:16:00,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:16:00,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-19 21:16:00,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:16:00,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-19 21:16:00,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 21:16:00,471 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 144 [2022-07-19 21:16:00,472 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 134 transitions, 412 flow. Second operand has 2 states, 2 states have (on average 121.0) internal successors, (242), 2 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:16:00,472 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:16:00,472 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 144 [2022-07-19 21:16:00,472 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:16:01,942 INFO L129 PetriNetUnfolder]: 2314/14268 cut-off events. [2022-07-19 21:16:01,943 INFO L130 PetriNetUnfolder]: For 7113/7113 co-relation queries the response was YES. [2022-07-19 21:16:02,032 INFO L84 FinitePrefix]: Finished finitePrefix Result has 18959 conditions, 14268 events. 2314/14268 cut-off events. For 7113/7113 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 159423 event pairs, 1291 based on Foata normal form. 1035/14268 useless extension candidates. Maximal degree in co-relation 9182. Up to 2314 conditions per place. [2022-07-19 21:16:02,070 INFO L132 encePairwiseOnDemand]: 140/144 looper letters, 18 selfloop transitions, 0 changer transitions 1/130 dead transitions. [2022-07-19 21:16:02,070 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 130 transitions, 440 flow [2022-07-19 21:16:02,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-19 21:16:02,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-19 21:16:02,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 262 transitions. [2022-07-19 21:16:02,071 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9097222222222222 [2022-07-19 21:16:02,071 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 262 transitions. [2022-07-19 21:16:02,071 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 262 transitions. [2022-07-19 21:16:02,072 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:16:02,072 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 262 transitions. [2022-07-19 21:16:02,072 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 131.0) internal successors, (262), 2 states have internal predecessors, (262), 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) [2022-07-19 21:16:02,073 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 144.0) internal successors, (432), 3 states have internal predecessors, (432), 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) [2022-07-19 21:16:02,073 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 144.0) internal successors, (432), 3 states have internal predecessors, (432), 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) [2022-07-19 21:16:02,073 INFO L186 Difference]: Start difference. First operand has 139 places, 134 transitions, 412 flow. Second operand 2 states and 262 transitions. [2022-07-19 21:16:02,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 130 transitions, 440 flow [2022-07-19 21:16:02,075 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 130 transitions, 440 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-19 21:16:02,076 INFO L242 Difference]: Finished difference. Result has 140 places, 129 transitions, 402 flow [2022-07-19 21:16:02,076 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=404, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=402, PETRI_PLACES=140, PETRI_TRANSITIONS=129} [2022-07-19 21:16:02,076 INFO L279 CegarLoopForPetriNet]: 139 programPoint places, 1 predicate places. [2022-07-19 21:16:02,076 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 129 transitions, 402 flow [2022-07-19 21:16:02,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 121.0) internal successors, (242), 2 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:16:02,077 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:16:02,077 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:16:02,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-07-19 21:16:02,077 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:16:02,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:16:02,077 INFO L85 PathProgramCache]: Analyzing trace with hash 507427541, now seen corresponding path program 1 times [2022-07-19 21:16:02,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:16:02,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42654368] [2022-07-19 21:16:02,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:16:02,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:16:02,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:16:02,120 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:16:02,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:16:02,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42654368] [2022-07-19 21:16:02,121 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42654368] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:16:02,121 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:16:02,121 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-19 21:16:02,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515420495] [2022-07-19 21:16:02,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:16:02,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-19 21:16:02,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:16:02,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-19 21:16:02,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-07-19 21:16:02,122 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 144 [2022-07-19 21:16:02,123 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 129 transitions, 402 flow. Second operand has 6 states, 6 states have (on average 96.16666666666667) internal successors, (577), 6 states have internal predecessors, (577), 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) [2022-07-19 21:16:02,123 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:16:02,123 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 144 [2022-07-19 21:16:02,123 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:16:04,009 INFO L129 PetriNetUnfolder]: 2340/17474 cut-off events. [2022-07-19 21:16:04,009 INFO L130 PetriNetUnfolder]: For 2496/2496 co-relation queries the response was YES. [2022-07-19 21:16:04,119 INFO L84 FinitePrefix]: Finished finitePrefix Result has 30057 conditions, 17474 events. 2340/17474 cut-off events. For 2496/2496 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 210278 event pairs, 825 based on Foata normal form. 0/16443 useless extension candidates. Maximal degree in co-relation 30045. Up to 7996 conditions per place. [2022-07-19 21:16:04,160 INFO L132 encePairwiseOnDemand]: 132/144 looper letters, 55 selfloop transitions, 9 changer transitions 0/150 dead transitions. [2022-07-19 21:16:04,160 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 150 transitions, 599 flow [2022-07-19 21:16:04,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-19 21:16:04,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-19 21:16:04,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 631 transitions. [2022-07-19 21:16:04,162 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7303240740740741 [2022-07-19 21:16:04,162 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 631 transitions. [2022-07-19 21:16:04,162 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 631 transitions. [2022-07-19 21:16:04,162 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:16:04,162 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 631 transitions. [2022-07-19 21:16:04,163 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 105.16666666666667) internal successors, (631), 6 states have internal predecessors, (631), 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) [2022-07-19 21:16:04,164 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 144.0) internal successors, (1008), 7 states have internal predecessors, (1008), 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) [2022-07-19 21:16:04,164 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 144.0) internal successors, (1008), 7 states have internal predecessors, (1008), 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) [2022-07-19 21:16:04,164 INFO L186 Difference]: Start difference. First operand has 140 places, 129 transitions, 402 flow. Second operand 6 states and 631 transitions. [2022-07-19 21:16:04,164 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 150 transitions, 599 flow [2022-07-19 21:16:04,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 150 transitions, 599 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-19 21:16:04,168 INFO L242 Difference]: Finished difference. Result has 145 places, 132 transitions, 444 flow [2022-07-19 21:16:04,169 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=402, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=444, PETRI_PLACES=145, PETRI_TRANSITIONS=132} [2022-07-19 21:16:04,169 INFO L279 CegarLoopForPetriNet]: 139 programPoint places, 6 predicate places. [2022-07-19 21:16:04,169 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 132 transitions, 444 flow [2022-07-19 21:16:04,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 96.16666666666667) internal successors, (577), 6 states have internal predecessors, (577), 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) [2022-07-19 21:16:04,169 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:16:04,169 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:16:04,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-07-19 21:16:04,170 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:16:04,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:16:04,170 INFO L85 PathProgramCache]: Analyzing trace with hash -1959051616, now seen corresponding path program 1 times [2022-07-19 21:16:04,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:16:04,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854372222] [2022-07-19 21:16:04,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:16:04,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:16:04,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:16:04,241 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 21:16:04,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:16:04,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854372222] [2022-07-19 21:16:04,242 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854372222] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:16:04,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156721026] [2022-07-19 21:16:04,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:16:04,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:16:04,242 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:16:04,243 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:16:04,244 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-19 21:16:04,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:16:04,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-19 21:16:04,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:16:04,463 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 21:16:04,463 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:16:04,527 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 21:16:04,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1156721026] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:16:04,527 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:16:04,527 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2022-07-19 21:16:04,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097356438] [2022-07-19 21:16:04,528 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:16:04,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-19 21:16:04,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:16:04,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-19 21:16:04,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=240, Unknown=0, NotChecked=0, Total=342 [2022-07-19 21:16:04,530 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 144 [2022-07-19 21:16:04,531 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 132 transitions, 444 flow. Second operand has 19 states, 19 states have (on average 95.73684210526316) internal successors, (1819), 19 states have internal predecessors, (1819), 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) [2022-07-19 21:16:04,531 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:16:04,531 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 144 [2022-07-19 21:16:04,532 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:16:06,719 INFO L129 PetriNetUnfolder]: 2337/17454 cut-off events. [2022-07-19 21:16:06,719 INFO L130 PetriNetUnfolder]: For 5052/5052 co-relation queries the response was YES. [2022-07-19 21:16:06,822 INFO L84 FinitePrefix]: Finished finitePrefix Result has 33708 conditions, 17454 events. 2337/17454 cut-off events. For 5052/5052 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 210499 event pairs, 826 based on Foata normal form. 2/17456 useless extension candidates. Maximal degree in co-relation 33694. Up to 5383 conditions per place. [2022-07-19 21:16:06,864 INFO L132 encePairwiseOnDemand]: 129/144 looper letters, 52 selfloop transitions, 20 changer transitions 0/157 dead transitions. [2022-07-19 21:16:06,864 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 157 transitions, 667 flow [2022-07-19 21:16:06,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-19 21:16:06,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-07-19 21:16:06,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1190 transitions. [2022-07-19 21:16:06,866 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6886574074074074 [2022-07-19 21:16:06,866 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1190 transitions. [2022-07-19 21:16:06,866 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1190 transitions. [2022-07-19 21:16:06,866 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:16:06,866 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1190 transitions. [2022-07-19 21:16:06,867 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 99.16666666666667) internal successors, (1190), 12 states have internal predecessors, (1190), 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) [2022-07-19 21:16:06,868 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 144.0) internal successors, (1872), 13 states have internal predecessors, (1872), 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) [2022-07-19 21:16:06,869 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 144.0) internal successors, (1872), 13 states have internal predecessors, (1872), 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) [2022-07-19 21:16:06,869 INFO L186 Difference]: Start difference. First operand has 145 places, 132 transitions, 444 flow. Second operand 12 states and 1190 transitions. [2022-07-19 21:16:06,869 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 157 transitions, 667 flow [2022-07-19 21:16:06,877 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 157 transitions, 655 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-07-19 21:16:06,878 INFO L242 Difference]: Finished difference. Result has 155 places, 140 transitions, 525 flow [2022-07-19 21:16:06,878 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=432, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=525, PETRI_PLACES=155, PETRI_TRANSITIONS=140} [2022-07-19 21:16:06,879 INFO L279 CegarLoopForPetriNet]: 139 programPoint places, 16 predicate places. [2022-07-19 21:16:06,879 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 140 transitions, 525 flow [2022-07-19 21:16:06,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 95.73684210526316) internal successors, (1819), 19 states have internal predecessors, (1819), 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) [2022-07-19 21:16:06,879 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:16:06,879 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:16:06,909 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-07-19 21:16:07,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-07-19 21:16:07,095 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:16:07,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:16:07,095 INFO L85 PathProgramCache]: Analyzing trace with hash -1736739955, now seen corresponding path program 1 times [2022-07-19 21:16:07,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:16:07,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250864726] [2022-07-19 21:16:07,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:16:07,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:16:07,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:16:07,162 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 21:16:07,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:16:07,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250864726] [2022-07-19 21:16:07,162 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250864726] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:16:07,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734247138] [2022-07-19 21:16:07,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:16:07,162 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:16:07,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:16:07,171 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:16:07,172 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-19 21:16:07,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:16:07,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-19 21:16:07,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:16:07,390 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 21:16:07,391 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:16:07,490 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 21:16:07,490 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [734247138] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:16:07,490 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:16:07,490 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2022-07-19 21:16:07,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455640790] [2022-07-19 21:16:07,490 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:16:07,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-19 21:16:07,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:16:07,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-19 21:16:07,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2022-07-19 21:16:07,492 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 144 [2022-07-19 21:16:07,493 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 140 transitions, 525 flow. Second operand has 21 states, 21 states have (on average 99.57142857142857) internal successors, (2091), 21 states have internal predecessors, (2091), 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) [2022-07-19 21:16:07,493 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:16:07,493 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 144 [2022-07-19 21:16:07,493 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:16:09,961 INFO L129 PetriNetUnfolder]: 2425/17099 cut-off events. [2022-07-19 21:16:09,962 INFO L130 PetriNetUnfolder]: For 11266/11266 co-relation queries the response was YES. [2022-07-19 21:16:10,096 INFO L84 FinitePrefix]: Finished finitePrefix Result has 39719 conditions, 17099 events. 2425/17099 cut-off events. For 11266/11266 co-relation queries the response was YES. Maximal size of possible extension queue 419. Compared 208950 event pairs, 443 based on Foata normal form. 161/17260 useless extension candidates. Maximal degree in co-relation 39702. Up to 5293 conditions per place. [2022-07-19 21:16:10,145 INFO L132 encePairwiseOnDemand]: 129/144 looper letters, 57 selfloop transitions, 29 changer transitions 0/173 dead transitions. [2022-07-19 21:16:10,145 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 173 transitions, 835 flow [2022-07-19 21:16:10,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-19 21:16:10,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2022-07-19 21:16:10,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 2296 transitions. [2022-07-19 21:16:10,148 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6932367149758454 [2022-07-19 21:16:10,148 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 2296 transitions. [2022-07-19 21:16:10,148 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 2296 transitions. [2022-07-19 21:16:10,148 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:16:10,148 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 2296 transitions. [2022-07-19 21:16:10,150 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 99.82608695652173) internal successors, (2296), 23 states have internal predecessors, (2296), 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) [2022-07-19 21:16:10,153 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 144.0) internal successors, (3456), 24 states have internal predecessors, (3456), 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) [2022-07-19 21:16:10,153 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 144.0) internal successors, (3456), 24 states have internal predecessors, (3456), 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) [2022-07-19 21:16:10,153 INFO L186 Difference]: Start difference. First operand has 155 places, 140 transitions, 525 flow. Second operand 23 states and 2296 transitions. [2022-07-19 21:16:10,153 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 173 transitions, 835 flow [2022-07-19 21:16:10,174 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 173 transitions, 814 flow, removed 5 selfloop flow, removed 4 redundant places. [2022-07-19 21:16:10,175 INFO L242 Difference]: Finished difference. Result has 174 places, 148 transitions, 605 flow [2022-07-19 21:16:10,176 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=506, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=605, PETRI_PLACES=174, PETRI_TRANSITIONS=148} [2022-07-19 21:16:10,176 INFO L279 CegarLoopForPetriNet]: 139 programPoint places, 35 predicate places. [2022-07-19 21:16:10,176 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 148 transitions, 605 flow [2022-07-19 21:16:10,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 99.57142857142857) internal successors, (2091), 21 states have internal predecessors, (2091), 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) [2022-07-19 21:16:10,177 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:16:10,177 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:16:10,193 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-07-19 21:16:10,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-07-19 21:16:10,388 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:16:10,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:16:10,389 INFO L85 PathProgramCache]: Analyzing trace with hash 517469326, now seen corresponding path program 1 times [2022-07-19 21:16:10,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:16:10,389 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855789171] [2022-07-19 21:16:10,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:16:10,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:16:10,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:16:10,469 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 2 proven. 32 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-07-19 21:16:10,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:16:10,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855789171] [2022-07-19 21:16:10,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855789171] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:16:10,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715773164] [2022-07-19 21:16:10,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:16:10,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:16:10,471 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:16:10,475 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:16:10,476 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-19 21:16:10,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:16:10,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-19 21:16:10,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:16:10,716 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-07-19 21:16:10,716 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:16:10,847 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-07-19 21:16:10,847 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [715773164] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:16:10,847 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:16:10,847 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2022-07-19 21:16:10,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750570910] [2022-07-19 21:16:10,847 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:16:10,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-19 21:16:10,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:16:10,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-19 21:16:10,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2022-07-19 21:16:10,849 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 144 [2022-07-19 21:16:10,850 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 148 transitions, 605 flow. Second operand has 21 states, 21 states have (on average 100.0) internal successors, (2100), 21 states have internal predecessors, (2100), 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) [2022-07-19 21:16:10,850 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:16:10,850 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 144 [2022-07-19 21:16:10,850 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:16:14,548 INFO L129 PetriNetUnfolder]: 2425/21293 cut-off events. [2022-07-19 21:16:14,549 INFO L130 PetriNetUnfolder]: For 24512/24512 co-relation queries the response was YES. [2022-07-19 21:16:14,717 INFO L84 FinitePrefix]: Finished finitePrefix Result has 57819 conditions, 21293 events. 2425/21293 cut-off events. For 24512/24512 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 275637 event pairs, 909 based on Foata normal form. 932/22225 useless extension candidates. Maximal degree in co-relation 57801. Up to 6547 conditions per place. [2022-07-19 21:16:14,780 INFO L132 encePairwiseOnDemand]: 129/144 looper letters, 49 selfloop transitions, 31 changer transitions 0/169 dead transitions. [2022-07-19 21:16:14,780 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 169 transitions, 855 flow [2022-07-19 21:16:14,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-19 21:16:14,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2022-07-19 21:16:14,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 2287 transitions. [2022-07-19 21:16:14,783 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6905193236714976 [2022-07-19 21:16:14,783 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 2287 transitions. [2022-07-19 21:16:14,783 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 2287 transitions. [2022-07-19 21:16:14,784 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:16:14,784 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 2287 transitions. [2022-07-19 21:16:14,786 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 99.43478260869566) internal successors, (2287), 23 states have internal predecessors, (2287), 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) [2022-07-19 21:16:14,789 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 144.0) internal successors, (3456), 24 states have internal predecessors, (3456), 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) [2022-07-19 21:16:14,789 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 144.0) internal successors, (3456), 24 states have internal predecessors, (3456), 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) [2022-07-19 21:16:14,789 INFO L186 Difference]: Start difference. First operand has 174 places, 148 transitions, 605 flow. Second operand 23 states and 2287 transitions. [2022-07-19 21:16:14,789 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 169 transitions, 855 flow [2022-07-19 21:16:14,838 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 169 transitions, 812 flow, removed 7 selfloop flow, removed 9 redundant places. [2022-07-19 21:16:14,839 INFO L242 Difference]: Finished difference. Result has 188 places, 154 transitions, 665 flow [2022-07-19 21:16:14,840 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=562, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=665, PETRI_PLACES=188, PETRI_TRANSITIONS=154} [2022-07-19 21:16:14,840 INFO L279 CegarLoopForPetriNet]: 139 programPoint places, 49 predicate places. [2022-07-19 21:16:14,840 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 154 transitions, 665 flow [2022-07-19 21:16:14,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 100.0) internal successors, (2100), 21 states have internal predecessors, (2100), 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) [2022-07-19 21:16:14,841 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:16:14,841 INFO L200 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:16:14,859 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-19 21:16:15,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-07-19 21:16:15,058 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:16:15,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:16:15,059 INFO L85 PathProgramCache]: Analyzing trace with hash 436831306, now seen corresponding path program 1 times [2022-07-19 21:16:15,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:16:15,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593798063] [2022-07-19 21:16:15,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:16:15,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:16:15,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:16:15,076 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-19 21:16:15,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:16:15,100 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-19 21:16:15,100 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-19 21:16:15,101 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-07-19 21:16:15,101 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-19 21:16:15,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-07-19 21:16:15,101 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-07-19 21:16:15,101 WARN L231 ceAbstractionStarter]: 9 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-19 21:16:15,101 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 10 thread instances. [2022-07-19 21:16:15,116 INFO L135 ThreadInstanceAdder]: Constructed 10 joinOtherThreadTransitions. [2022-07-19 21:16:15,117 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 156 places, 151 transitions, 472 flow [2022-07-19 21:16:19,004 INFO L129 PetriNetUnfolder]: 8215/41177 cut-off events. [2022-07-19 21:16:19,005 INFO L130 PetriNetUnfolder]: For 5330/5330 co-relation queries the response was YES. [2022-07-19 21:16:19,137 INFO L84 FinitePrefix]: Finished finitePrefix Result has 46383 conditions, 41177 events. 8215/41177 cut-off events. For 5330/5330 co-relation queries the response was YES. Maximal size of possible extension queue 715. Compared 532865 event pairs, 3084 based on Foata normal form. 0/35010 useless extension candidates. Maximal degree in co-relation 22780. Up to 5120 conditions per place. [2022-07-19 21:16:19,137 INFO L82 GeneralOperation]: Start removeDead. Operand has 156 places, 151 transitions, 472 flow [2022-07-19 21:16:19,207 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 147 places, 141 transitions, 452 flow [2022-07-19 21:16:19,207 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:16:19,208 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=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@e1dbc24, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@745720f0 [2022-07-19 21:16:19,208 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-19 21:16:19,210 INFO L129 PetriNetUnfolder]: 6/74 cut-off events. [2022-07-19 21:16:19,210 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-19 21:16:19,210 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:16:19,210 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:16:19,210 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:16:19,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:16:19,211 INFO L85 PathProgramCache]: Analyzing trace with hash 2146014350, now seen corresponding path program 1 times [2022-07-19 21:16:19,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:16:19,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076828284] [2022-07-19 21:16:19,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:16:19,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:16:19,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:16:19,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:16:19,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:16:19,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076828284] [2022-07-19 21:16:19,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076828284] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:16:19,219 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:16:19,219 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 21:16:19,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291968345] [2022-07-19 21:16:19,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:16:19,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-19 21:16:19,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:16:19,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-19 21:16:19,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 21:16:19,220 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 151 [2022-07-19 21:16:19,220 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 141 transitions, 452 flow. Second operand has 2 states, 2 states have (on average 126.0) internal successors, (252), 2 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) [2022-07-19 21:16:19,220 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:16:19,221 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 151 [2022-07-19 21:16:19,221 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:16:22,359 INFO L129 PetriNetUnfolder]: 5131/28877 cut-off events. [2022-07-19 21:16:22,359 INFO L130 PetriNetUnfolder]: For 15625/15625 co-relation queries the response was YES. [2022-07-19 21:16:22,446 INFO L84 FinitePrefix]: Finished finitePrefix Result has 39214 conditions, 28877 events. 5131/28877 cut-off events. For 15625/15625 co-relation queries the response was YES. Maximal size of possible extension queue 541. Compared 363414 event pairs, 3084 based on Foata normal form. 2060/28877 useless extension candidates. Maximal degree in co-relation 18938. Up to 5131 conditions per place. [2022-07-19 21:16:22,510 INFO L132 encePairwiseOnDemand]: 147/151 looper letters, 20 selfloop transitions, 0 changer transitions 1/137 dead transitions. [2022-07-19 21:16:22,511 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 137 transitions, 484 flow [2022-07-19 21:16:22,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-19 21:16:22,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-19 21:16:22,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 274 transitions. [2022-07-19 21:16:22,512 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9072847682119205 [2022-07-19 21:16:22,513 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 274 transitions. [2022-07-19 21:16:22,513 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 274 transitions. [2022-07-19 21:16:22,513 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:16:22,513 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 274 transitions. [2022-07-19 21:16:22,513 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 137.0) internal successors, (274), 2 states have internal predecessors, (274), 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) [2022-07-19 21:16:22,514 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 151.0) internal successors, (453), 3 states have internal predecessors, (453), 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) [2022-07-19 21:16:22,514 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 151.0) internal successors, (453), 3 states have internal predecessors, (453), 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) [2022-07-19 21:16:22,514 INFO L186 Difference]: Start difference. First operand has 147 places, 141 transitions, 452 flow. Second operand 2 states and 274 transitions. [2022-07-19 21:16:22,514 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 137 transitions, 484 flow [2022-07-19 21:16:22,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 137 transitions, 484 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-19 21:16:22,521 INFO L242 Difference]: Finished difference. Result has 148 places, 136 transitions, 442 flow [2022-07-19 21:16:22,521 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=444, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=442, PETRI_PLACES=148, PETRI_TRANSITIONS=136} [2022-07-19 21:16:22,521 INFO L279 CegarLoopForPetriNet]: 147 programPoint places, 1 predicate places. [2022-07-19 21:16:22,521 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 136 transitions, 442 flow [2022-07-19 21:16:22,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 126.0) internal successors, (252), 2 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) [2022-07-19 21:16:22,522 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:16:22,522 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:16:22,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-07-19 21:16:22,522 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:16:22,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:16:22,522 INFO L85 PathProgramCache]: Analyzing trace with hash 2078583564, now seen corresponding path program 1 times [2022-07-19 21:16:22,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:16:22,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841326644] [2022-07-19 21:16:22,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:16:22,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:16:22,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:16:22,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:16:22,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:16:22,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841326644] [2022-07-19 21:16:22,585 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841326644] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:16:22,585 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:16:22,585 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-19 21:16:22,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207590779] [2022-07-19 21:16:22,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:16:22,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-19 21:16:22,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:16:22,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-19 21:16:22,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-07-19 21:16:22,587 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 151 [2022-07-19 21:16:22,587 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 136 transitions, 442 flow. Second operand has 6 states, 6 states have (on average 101.16666666666667) internal successors, (607), 6 states have internal predecessors, (607), 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) [2022-07-19 21:16:22,587 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:16:22,587 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 151 [2022-07-19 21:16:22,587 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:16:27,138 INFO L129 PetriNetUnfolder]: 5165/35193 cut-off events. [2022-07-19 21:16:27,138 INFO L130 PetriNetUnfolder]: For 5375/5375 co-relation queries the response was YES. [2022-07-19 21:16:27,300 INFO L84 FinitePrefix]: Finished finitePrefix Result has 61146 conditions, 35193 events. 5165/35193 cut-off events. For 5375/5375 co-relation queries the response was YES. Maximal size of possible extension queue 722. Compared 474637 event pairs, 2116 based on Foata normal form. 0/33137 useless extension candidates. Maximal degree in co-relation 61133. Up to 16457 conditions per place. [2022-07-19 21:16:27,377 INFO L132 encePairwiseOnDemand]: 139/151 looper letters, 58 selfloop transitions, 9 changer transitions 0/158 dead transitions. [2022-07-19 21:16:27,378 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 158 transitions, 650 flow [2022-07-19 21:16:27,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-19 21:16:27,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-19 21:16:27,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 664 transitions. [2022-07-19 21:16:27,379 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7328918322295805 [2022-07-19 21:16:27,379 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 664 transitions. [2022-07-19 21:16:27,379 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 664 transitions. [2022-07-19 21:16:27,379 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:16:27,379 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 664 transitions. [2022-07-19 21:16:27,380 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 110.66666666666667) internal successors, (664), 6 states have internal predecessors, (664), 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) [2022-07-19 21:16:27,381 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 151.0) internal successors, (1057), 7 states have internal predecessors, (1057), 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) [2022-07-19 21:16:27,381 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 151.0) internal successors, (1057), 7 states have internal predecessors, (1057), 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) [2022-07-19 21:16:27,381 INFO L186 Difference]: Start difference. First operand has 148 places, 136 transitions, 442 flow. Second operand 6 states and 664 transitions. [2022-07-19 21:16:27,381 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 158 transitions, 650 flow [2022-07-19 21:16:27,388 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 158 transitions, 650 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-19 21:16:27,389 INFO L242 Difference]: Finished difference. Result has 153 places, 139 transitions, 484 flow [2022-07-19 21:16:27,390 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=442, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=484, PETRI_PLACES=153, PETRI_TRANSITIONS=139} [2022-07-19 21:16:27,390 INFO L279 CegarLoopForPetriNet]: 147 programPoint places, 6 predicate places. [2022-07-19 21:16:27,390 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 139 transitions, 484 flow [2022-07-19 21:16:27,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 101.16666666666667) internal successors, (607), 6 states have internal predecessors, (607), 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) [2022-07-19 21:16:27,390 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:16:27,390 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:16:27,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-07-19 21:16:27,391 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:16:27,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:16:27,391 INFO L85 PathProgramCache]: Analyzing trace with hash -1349887398, now seen corresponding path program 1 times [2022-07-19 21:16:27,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:16:27,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820706030] [2022-07-19 21:16:27,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:16:27,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:16:27,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:16:27,463 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 21:16:27,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:16:27,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820706030] [2022-07-19 21:16:27,464 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820706030] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:16:27,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29125960] [2022-07-19 21:16:27,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:16:27,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:16:27,464 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:16:27,480 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:16:27,481 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-19 21:16:27,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:16:27,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-19 21:16:27,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:16:27,715 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 21:16:27,715 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:16:27,772 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 21:16:27,772 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [29125960] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:16:27,772 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:16:27,772 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2022-07-19 21:16:27,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881613510] [2022-07-19 21:16:27,773 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:16:27,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-19 21:16:27,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:16:27,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-19 21:16:27,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=240, Unknown=0, NotChecked=0, Total=342 [2022-07-19 21:16:27,774 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 151 [2022-07-19 21:16:27,775 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 139 transitions, 484 flow. Second operand has 19 states, 19 states have (on average 100.73684210526316) internal successors, (1914), 19 states have internal predecessors, (1914), 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) [2022-07-19 21:16:27,775 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:16:27,775 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 151 [2022-07-19 21:16:27,775 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:16:32,929 INFO L129 PetriNetUnfolder]: 5162/35173 cut-off events. [2022-07-19 21:16:32,929 INFO L130 PetriNetUnfolder]: For 10491/10491 co-relation queries the response was YES. [2022-07-19 21:16:33,171 INFO L84 FinitePrefix]: Finished finitePrefix Result has 68404 conditions, 35173 events. 5162/35173 cut-off events. For 10491/10491 co-relation queries the response was YES. Maximal size of possible extension queue 722. Compared 474885 event pairs, 2117 based on Foata normal form. 2/35175 useless extension candidates. Maximal degree in co-relation 68389. Up to 11273 conditions per place. [2022-07-19 21:16:33,266 INFO L132 encePairwiseOnDemand]: 136/151 looper letters, 55 selfloop transitions, 20 changer transitions 0/165 dead transitions. [2022-07-19 21:16:33,266 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 165 transitions, 718 flow [2022-07-19 21:16:33,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-19 21:16:33,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-07-19 21:16:33,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1253 transitions. [2022-07-19 21:16:33,268 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6915011037527594 [2022-07-19 21:16:33,268 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1253 transitions. [2022-07-19 21:16:33,268 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1253 transitions. [2022-07-19 21:16:33,268 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:16:33,268 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1253 transitions. [2022-07-19 21:16:33,270 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 104.41666666666667) internal successors, (1253), 12 states have internal predecessors, (1253), 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) [2022-07-19 21:16:33,271 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 151.0) internal successors, (1963), 13 states have internal predecessors, (1963), 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) [2022-07-19 21:16:33,271 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 151.0) internal successors, (1963), 13 states have internal predecessors, (1963), 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) [2022-07-19 21:16:33,271 INFO L186 Difference]: Start difference. First operand has 153 places, 139 transitions, 484 flow. Second operand 12 states and 1253 transitions. [2022-07-19 21:16:33,271 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 165 transitions, 718 flow [2022-07-19 21:16:33,297 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 165 transitions, 706 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-07-19 21:16:33,299 INFO L242 Difference]: Finished difference. Result has 163 places, 147 transitions, 565 flow [2022-07-19 21:16:33,299 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=472, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=565, PETRI_PLACES=163, PETRI_TRANSITIONS=147} [2022-07-19 21:16:33,299 INFO L279 CegarLoopForPetriNet]: 147 programPoint places, 16 predicate places. [2022-07-19 21:16:33,300 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 147 transitions, 565 flow [2022-07-19 21:16:33,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 100.73684210526316) internal successors, (1914), 19 states have internal predecessors, (1914), 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) [2022-07-19 21:16:33,300 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:16:33,300 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:16:33,318 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-07-19 21:16:33,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:16:33,518 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:16:33,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:16:33,518 INFO L85 PathProgramCache]: Analyzing trace with hash 2099791053, now seen corresponding path program 1 times [2022-07-19 21:16:33,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:16:33,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059894815] [2022-07-19 21:16:33,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:16:33,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:16:33,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:16:33,610 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 21:16:33,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:16:33,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059894815] [2022-07-19 21:16:33,611 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059894815] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:16:33,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513951137] [2022-07-19 21:16:33,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:16:33,611 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:16:33,612 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:16:33,628 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:16:33,665 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-19 21:16:33,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:16:33,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-19 21:16:33,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:16:33,854 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 21:16:33,854 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:16:33,939 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 21:16:33,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [513951137] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:16:33,940 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:16:33,940 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2022-07-19 21:16:33,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176943792] [2022-07-19 21:16:33,940 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:16:33,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-19 21:16:33,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:16:33,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-19 21:16:33,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2022-07-19 21:16:33,941 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 151 [2022-07-19 21:16:33,942 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 147 transitions, 565 flow. Second operand has 21 states, 21 states have (on average 104.57142857142857) internal successors, (2196), 21 states have internal predecessors, (2196), 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) [2022-07-19 21:16:33,942 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:16:33,942 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 151 [2022-07-19 21:16:33,942 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:16:39,404 INFO L129 PetriNetUnfolder]: 5303/34867 cut-off events. [2022-07-19 21:16:39,404 INFO L130 PetriNetUnfolder]: For 22976/22976 co-relation queries the response was YES. [2022-07-19 21:16:39,556 INFO L84 FinitePrefix]: Finished finitePrefix Result has 80890 conditions, 34867 events. 5303/34867 cut-off events. For 22976/22976 co-relation queries the response was YES. Maximal size of possible extension queue 794. Compared 474995 event pairs, 1268 based on Foata normal form. 216/35083 useless extension candidates. Maximal degree in co-relation 80872. Up to 11201 conditions per place. [2022-07-19 21:16:39,655 INFO L132 encePairwiseOnDemand]: 136/151 looper letters, 61 selfloop transitions, 29 changer transitions 0/182 dead transitions. [2022-07-19 21:16:39,656 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 182 transitions, 893 flow [2022-07-19 21:16:39,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-19 21:16:39,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2022-07-19 21:16:39,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 2415 transitions. [2022-07-19 21:16:39,658 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.695364238410596 [2022-07-19 21:16:39,658 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 2415 transitions. [2022-07-19 21:16:39,658 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 2415 transitions. [2022-07-19 21:16:39,659 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:16:39,659 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 2415 transitions. [2022-07-19 21:16:39,661 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 105.0) internal successors, (2415), 23 states have internal predecessors, (2415), 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) [2022-07-19 21:16:39,667 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 151.0) internal successors, (3624), 24 states have internal predecessors, (3624), 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) [2022-07-19 21:16:39,667 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 151.0) internal successors, (3624), 24 states have internal predecessors, (3624), 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) [2022-07-19 21:16:39,667 INFO L186 Difference]: Start difference. First operand has 163 places, 147 transitions, 565 flow. Second operand 23 states and 2415 transitions. [2022-07-19 21:16:39,667 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 182 transitions, 893 flow [2022-07-19 21:16:39,705 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 182 transitions, 872 flow, removed 5 selfloop flow, removed 4 redundant places. [2022-07-19 21:16:39,707 INFO L242 Difference]: Finished difference. Result has 182 places, 155 transitions, 645 flow [2022-07-19 21:16:39,707 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=546, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=645, PETRI_PLACES=182, PETRI_TRANSITIONS=155} [2022-07-19 21:16:39,708 INFO L279 CegarLoopForPetriNet]: 147 programPoint places, 35 predicate places. [2022-07-19 21:16:39,709 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 155 transitions, 645 flow [2022-07-19 21:16:39,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 104.57142857142857) internal successors, (2196), 21 states have internal predecessors, (2196), 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) [2022-07-19 21:16:39,709 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:16:39,709 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:16:39,732 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-19 21:16:39,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2022-07-19 21:16:39,925 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:16:39,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:16:39,925 INFO L85 PathProgramCache]: Analyzing trace with hash -1058301176, now seen corresponding path program 1 times [2022-07-19 21:16:39,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:16:39,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671427054] [2022-07-19 21:16:39,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:16:39,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:16:39,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:16:40,044 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 2 proven. 32 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-07-19 21:16:40,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:16:40,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671427054] [2022-07-19 21:16:40,044 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671427054] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:16:40,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332139086] [2022-07-19 21:16:40,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:16:40,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:16:40,045 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:16:40,059 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 21:16:40,061 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-19 21:16:40,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:16:40,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-19 21:16:40,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:16:40,305 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-07-19 21:16:40,306 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:16:40,419 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-07-19 21:16:40,419 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [332139086] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:16:40,419 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:16:40,419 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2022-07-19 21:16:40,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137918513] [2022-07-19 21:16:40,419 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:16:40,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-19 21:16:40,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:16:40,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-19 21:16:40,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2022-07-19 21:16:40,421 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 151 [2022-07-19 21:16:40,422 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 155 transitions, 645 flow. Second operand has 21 states, 21 states have (on average 105.0) internal successors, (2205), 21 states have internal predecessors, (2205), 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) [2022-07-19 21:16:40,422 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:16:40,422 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 151 [2022-07-19 21:16:40,422 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand