./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/unroll-cond-5.wvr.c --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/weaver/unroll-cond-5.wvr.c -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 b2b2bb654bf56c4e17e833d277e8505998c0901a0fe529242a0e0db923034741 --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-19 21:47:24,455 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 21:47:24,457 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 21:47:24,498 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 21:47:24,498 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 21:47:24,500 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 21:47:24,501 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 21:47:24,503 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 21:47:24,505 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 21:47:24,509 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 21:47:24,510 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 21:47:24,512 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 21:47:24,512 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 21:47:24,514 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 21:47:24,515 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 21:47:24,518 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 21:47:24,519 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 21:47:24,520 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 21:47:24,522 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 21:47:24,527 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 21:47:24,528 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 21:47:24,529 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 21:47:24,530 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 21:47:24,530 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 21:47:24,532 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 21:47:24,538 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 21:47:24,538 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 21:47:24,539 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 21:47:24,540 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 21:47:24,540 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 21:47:24,541 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 21:47:24,541 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 21:47:24,543 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 21:47:24,543 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 21:47:24,544 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 21:47:24,545 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 21:47:24,546 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 21:47:24,546 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 21:47:24,547 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 21:47:24,547 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 21:47:24,547 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 21:47:24,549 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 21:47:24,550 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-19 21:47:24,577 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 21:47:24,577 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 21:47:24,578 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 21:47:24,578 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 21:47:24,579 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 21:47:24,579 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 21:47:24,579 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 21:47:24,580 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 21:47:24,580 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 21:47:24,581 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 21:47:24,581 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-19 21:47:24,581 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-19 21:47:24,581 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-19 21:47:24,582 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 21:47:24,582 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 21:47:24,582 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 21:47:24,582 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 21:47:24,582 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-19 21:47:24,582 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 21:47:24,583 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 21:47:24,583 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 21:47:24,583 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 21:47:24,583 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 21:47:24,583 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 21:47:24,584 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 21:47:24,584 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 21:47:24,584 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 21:47:24,584 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 21:47:24,584 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-19 21:47:24,585 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-19 21:47:24,585 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 21:47:24,585 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 21:47:24,585 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 21:47:24,586 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b2b2bb654bf56c4e17e833d277e8505998c0901a0fe529242a0e0db923034741 [2022-07-19 21:47:24,815 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 21:47:24,835 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 21:47:24,838 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 21:47:24,839 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 21:47:24,842 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 21:47:24,843 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/unroll-cond-5.wvr.c [2022-07-19 21:47:24,906 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/02aa9bb21/22c4d670eed04fdc9b39ec8b5bdbcfa3/FLAG7f7b340e4 [2022-07-19 21:47:25,285 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 21:47:25,287 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/unroll-cond-5.wvr.c [2022-07-19 21:47:25,292 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/02aa9bb21/22c4d670eed04fdc9b39ec8b5bdbcfa3/FLAG7f7b340e4 [2022-07-19 21:47:25,689 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/02aa9bb21/22c4d670eed04fdc9b39ec8b5bdbcfa3 [2022-07-19 21:47:25,691 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 21:47:25,692 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 21:47:25,696 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 21:47:25,697 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 21:47:25,705 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 21:47:25,706 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:47:25" (1/1) ... [2022-07-19 21:47:25,707 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c1159ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:47:25, skipping insertion in model container [2022-07-19 21:47:25,707 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:47:25" (1/1) ... [2022-07-19 21:47:25,712 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 21:47:25,739 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 21:47:25,968 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/weaver/unroll-cond-5.wvr.c[2975,2988] [2022-07-19 21:47:25,984 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 21:47:25,990 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 21:47:26,010 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/weaver/unroll-cond-5.wvr.c[2975,2988] [2022-07-19 21:47:26,013 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 21:47:26,026 INFO L208 MainTranslator]: Completed translation [2022-07-19 21:47:26,026 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:47:26 WrapperNode [2022-07-19 21:47:26,026 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 21:47:26,027 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 21:47:26,028 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 21:47:26,028 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 21:47:26,033 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:47:26" (1/1) ... [2022-07-19 21:47:26,044 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:47:26" (1/1) ... [2022-07-19 21:47:26,070 INFO L137 Inliner]: procedures = 24, calls = 45, calls flagged for inlining = 17, calls inlined = 17, statements flattened = 204 [2022-07-19 21:47:26,071 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 21:47:26,072 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 21:47:26,072 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 21:47:26,072 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 21:47:26,079 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:47:26" (1/1) ... [2022-07-19 21:47:26,079 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:47:26" (1/1) ... [2022-07-19 21:47:26,083 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:47:26" (1/1) ... [2022-07-19 21:47:26,083 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:47:26" (1/1) ... [2022-07-19 21:47:26,094 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:47:26" (1/1) ... [2022-07-19 21:47:26,098 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:47:26" (1/1) ... [2022-07-19 21:47:26,100 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:47:26" (1/1) ... [2022-07-19 21:47:26,103 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 21:47:26,104 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 21:47:26,104 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 21:47:26,104 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 21:47:26,105 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:47:26" (1/1) ... [2022-07-19 21:47:26,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 21:47:26,122 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:47:26,136 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 21:47:26,143 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 21:47:26,168 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 21:47:26,168 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-07-19 21:47:26,168 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-07-19 21:47:26,168 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-07-19 21:47:26,168 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-07-19 21:47:26,168 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-19 21:47:26,169 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-19 21:47:26,169 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-19 21:47:26,169 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-19 21:47:26,169 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 21:47:26,169 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 21:47:26,169 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-19 21:47:26,170 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-19 21:47:26,171 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 21:47:26,235 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 21:47:26,237 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 21:47:26,598 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 21:47:26,608 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 21:47:26,613 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-07-19 21:47:26,617 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:47:26 BoogieIcfgContainer [2022-07-19 21:47:26,617 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 21:47:26,620 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 21:47:26,621 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 21:47:26,623 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 21:47:26,624 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 09:47:25" (1/3) ... [2022-07-19 21:47:26,624 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65fc964 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:47:26, skipping insertion in model container [2022-07-19 21:47:26,625 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:47:26" (2/3) ... [2022-07-19 21:47:26,625 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65fc964 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:47:26, skipping insertion in model container [2022-07-19 21:47:26,625 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:47:26" (3/3) ... [2022-07-19 21:47:26,626 INFO L111 eAbstractionObserver]: Analyzing ICFG unroll-cond-5.wvr.c [2022-07-19 21:47:26,631 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-19 21:47:26,638 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 21:47:26,639 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-19 21:47:26,639 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-19 21:47:26,714 INFO L135 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-07-19 21:47:26,751 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 252 places, 269 transitions, 554 flow [2022-07-19 21:47:26,872 INFO L129 PetriNetUnfolder]: 24/267 cut-off events. [2022-07-19 21:47:26,873 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-19 21:47:26,879 INFO L84 FinitePrefix]: Finished finitePrefix Result has 276 conditions, 267 events. 24/267 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 515 event pairs, 0 based on Foata normal form. 0/242 useless extension candidates. Maximal degree in co-relation 171. Up to 2 conditions per place. [2022-07-19 21:47:26,880 INFO L82 GeneralOperation]: Start removeDead. Operand has 252 places, 269 transitions, 554 flow [2022-07-19 21:47:26,910 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 241 places, 258 transitions, 528 flow [2022-07-19 21:47:26,928 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:47:26,942 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@51ebd1fe, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@3690a0c2 [2022-07-19 21:47:26,942 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-07-19 21:47:26,983 INFO L129 PetriNetUnfolder]: 20/215 cut-off events. [2022-07-19 21:47:26,983 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-19 21:47:26,984 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:47:26,985 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, 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 21:47:26,985 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:47:26,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:47:26,992 INFO L85 PathProgramCache]: Analyzing trace with hash 2077620581, now seen corresponding path program 1 times [2022-07-19 21:47:27,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:47:27,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354666592] [2022-07-19 21:47:27,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:47:27,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:47:27,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:47:27,218 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 21:47:27,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:47:27,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354666592] [2022-07-19 21:47:27,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354666592] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:47:27,219 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:47:27,220 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 21:47:27,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28323786] [2022-07-19 21:47:27,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:47:27,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-19 21:47:27,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:47:27,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-19 21:47:27,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 21:47:27,258 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 247 out of 269 [2022-07-19 21:47:27,263 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 258 transitions, 528 flow. Second operand has 2 states, 2 states have (on average 250.0) internal successors, (500), 2 states have internal predecessors, (500), 0 states have call successors, (0), 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 21:47:27,263 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:47:27,263 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 247 of 269 [2022-07-19 21:47:27,265 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:47:27,328 INFO L129 PetriNetUnfolder]: 7/241 cut-off events. [2022-07-19 21:47:27,328 INFO L130 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2022-07-19 21:47:27,332 INFO L84 FinitePrefix]: Finished finitePrefix Result has 255 conditions, 241 events. 7/241 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 472 event pairs, 0 based on Foata normal form. 20/240 useless extension candidates. Maximal degree in co-relation 160. Up to 5 conditions per place. [2022-07-19 21:47:27,334 INFO L132 encePairwiseOnDemand]: 252/269 looper letters, 4 selfloop transitions, 0 changer transitions 4/241 dead transitions. [2022-07-19 21:47:27,334 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 241 transitions, 502 flow [2022-07-19 21:47:27,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-19 21:47:27,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-19 21:47:27,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 515 transitions. [2022-07-19 21:47:27,353 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9572490706319703 [2022-07-19 21:47:27,354 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 515 transitions. [2022-07-19 21:47:27,354 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 515 transitions. [2022-07-19 21:47:27,358 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:47:27,360 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 515 transitions. [2022-07-19 21:47:27,364 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 257.5) internal successors, (515), 2 states have internal predecessors, (515), 0 states have call successors, (0), 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 21:47:27,369 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 269.0) internal successors, (807), 3 states have internal predecessors, (807), 0 states have call successors, (0), 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 21:47:27,370 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 269.0) internal successors, (807), 3 states have internal predecessors, (807), 0 states have call successors, (0), 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 21:47:27,371 INFO L186 Difference]: Start difference. First operand has 241 places, 258 transitions, 528 flow. Second operand 2 states and 515 transitions. [2022-07-19 21:47:27,372 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 241 transitions, 502 flow [2022-07-19 21:47:27,376 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 241 transitions, 494 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-07-19 21:47:27,381 INFO L242 Difference]: Finished difference. Result has 238 places, 237 transitions, 478 flow [2022-07-19 21:47:27,383 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=269, PETRI_DIFFERENCE_MINUEND_FLOW=486, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=478, PETRI_PLACES=238, PETRI_TRANSITIONS=237} [2022-07-19 21:47:27,386 INFO L279 CegarLoopForPetriNet]: 241 programPoint places, -3 predicate places. [2022-07-19 21:47:27,387 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 237 transitions, 478 flow [2022-07-19 21:47:27,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 250.0) internal successors, (500), 2 states have internal predecessors, (500), 0 states have call successors, (0), 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 21:47:27,388 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:47:27,388 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, 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 21:47:27,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-19 21:47:27,388 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:47:27,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:47:27,389 INFO L85 PathProgramCache]: Analyzing trace with hash 1370319885, now seen corresponding path program 1 times [2022-07-19 21:47:27,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:47:27,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736660150] [2022-07-19 21:47:27,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:47:27,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:47:27,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:47:27,676 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 21:47:27,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:47:27,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736660150] [2022-07-19 21:47:27,677 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736660150] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:47:27,677 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:47:27,678 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 21:47:27,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048421022] [2022-07-19 21:47:27,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:47:27,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 21:47:27,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:47:27,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 21:47:27,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-19 21:47:27,683 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 214 out of 269 [2022-07-19 21:47:27,684 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 237 transitions, 478 flow. Second operand has 4 states, 4 states have (on average 217.25) internal successors, (869), 4 states have internal predecessors, (869), 0 states have call successors, (0), 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 21:47:27,684 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:47:27,684 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 214 of 269 [2022-07-19 21:47:27,685 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:47:27,869 INFO L129 PetriNetUnfolder]: 209/989 cut-off events. [2022-07-19 21:47:27,869 INFO L130 PetriNetUnfolder]: For 37/37 co-relation queries the response was YES. [2022-07-19 21:47:27,872 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1345 conditions, 989 events. 209/989 cut-off events. For 37/37 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 4992 event pairs, 56 based on Foata normal form. 0/831 useless extension candidates. Maximal degree in co-relation 1342. Up to 269 conditions per place. [2022-07-19 21:47:27,877 INFO L132 encePairwiseOnDemand]: 263/269 looper letters, 49 selfloop transitions, 5 changer transitions 0/254 dead transitions. [2022-07-19 21:47:27,877 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 254 transitions, 622 flow [2022-07-19 21:47:27,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 21:47:27,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-07-19 21:47:27,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 911 transitions. [2022-07-19 21:47:27,880 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8466542750929368 [2022-07-19 21:47:27,880 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 911 transitions. [2022-07-19 21:47:27,880 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 911 transitions. [2022-07-19 21:47:27,881 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:47:27,881 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 911 transitions. [2022-07-19 21:47:27,883 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 227.75) internal successors, (911), 4 states have internal predecessors, (911), 0 states have call successors, (0), 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 21:47:27,886 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 269.0) internal successors, (1345), 5 states have internal predecessors, (1345), 0 states have call successors, (0), 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 21:47:27,887 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 269.0) internal successors, (1345), 5 states have internal predecessors, (1345), 0 states have call successors, (0), 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 21:47:27,887 INFO L186 Difference]: Start difference. First operand has 238 places, 237 transitions, 478 flow. Second operand 4 states and 911 transitions. [2022-07-19 21:47:27,887 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 254 transitions, 622 flow [2022-07-19 21:47:27,889 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 254 transitions, 622 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-19 21:47:27,893 INFO L242 Difference]: Finished difference. Result has 239 places, 241 transitions, 512 flow [2022-07-19 21:47:27,894 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=269, PETRI_DIFFERENCE_MINUEND_FLOW=478, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=512, PETRI_PLACES=239, PETRI_TRANSITIONS=241} [2022-07-19 21:47:27,895 INFO L279 CegarLoopForPetriNet]: 241 programPoint places, -2 predicate places. [2022-07-19 21:47:27,895 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 241 transitions, 512 flow [2022-07-19 21:47:27,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 217.25) internal successors, (869), 4 states have internal predecessors, (869), 0 states have call successors, (0), 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 21:47:27,896 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:47:27,896 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:47:27,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-19 21:47:27,896 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:47:27,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:47:27,897 INFO L85 PathProgramCache]: Analyzing trace with hash -735789891, now seen corresponding path program 1 times [2022-07-19 21:47:27,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:47:27,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680746008] [2022-07-19 21:47:27,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:47:27,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:47:27,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:47:28,149 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 21:47:28,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:47:28,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680746008] [2022-07-19 21:47:28,150 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680746008] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:47:28,150 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:47:28,151 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 21:47:28,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302944754] [2022-07-19 21:47:28,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:47:28,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 21:47:28,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:47:28,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 21:47:28,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-19 21:47:28,154 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 214 out of 269 [2022-07-19 21:47:28,155 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 241 transitions, 512 flow. Second operand has 4 states, 4 states have (on average 217.75) internal successors, (871), 4 states have internal predecessors, (871), 0 states have call successors, (0), 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 21:47:28,155 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:47:28,155 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 214 of 269 [2022-07-19 21:47:28,155 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:47:28,341 INFO L129 PetriNetUnfolder]: 195/921 cut-off events. [2022-07-19 21:47:28,341 INFO L130 PetriNetUnfolder]: For 53/53 co-relation queries the response was YES. [2022-07-19 21:47:28,344 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1302 conditions, 921 events. 195/921 cut-off events. For 53/53 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 4450 event pairs, 83 based on Foata normal form. 0/789 useless extension candidates. Maximal degree in co-relation 1296. Up to 270 conditions per place. [2022-07-19 21:47:28,350 INFO L132 encePairwiseOnDemand]: 264/269 looper letters, 46 selfloop transitions, 4 changer transitions 0/250 dead transitions. [2022-07-19 21:47:28,351 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 250 transitions, 629 flow [2022-07-19 21:47:28,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 21:47:28,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-07-19 21:47:28,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 907 transitions. [2022-07-19 21:47:28,354 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8429368029739777 [2022-07-19 21:47:28,354 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 907 transitions. [2022-07-19 21:47:28,354 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 907 transitions. [2022-07-19 21:47:28,355 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:47:28,356 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 907 transitions. [2022-07-19 21:47:28,358 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 226.75) internal successors, (907), 4 states have internal predecessors, (907), 0 states have call successors, (0), 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 21:47:28,360 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 269.0) internal successors, (1345), 5 states have internal predecessors, (1345), 0 states have call successors, (0), 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 21:47:28,361 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 269.0) internal successors, (1345), 5 states have internal predecessors, (1345), 0 states have call successors, (0), 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 21:47:28,361 INFO L186 Difference]: Start difference. First operand has 239 places, 241 transitions, 512 flow. Second operand 4 states and 907 transitions. [2022-07-19 21:47:28,362 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 250 transitions, 629 flow [2022-07-19 21:47:28,365 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 250 transitions, 622 flow, removed 2 selfloop flow, removed 1 redundant places. [2022-07-19 21:47:28,369 INFO L242 Difference]: Finished difference. Result has 242 places, 240 transitions, 512 flow [2022-07-19 21:47:28,369 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=269, PETRI_DIFFERENCE_MINUEND_FLOW=500, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=512, PETRI_PLACES=242, PETRI_TRANSITIONS=240} [2022-07-19 21:47:28,371 INFO L279 CegarLoopForPetriNet]: 241 programPoint places, 1 predicate places. [2022-07-19 21:47:28,372 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 240 transitions, 512 flow [2022-07-19 21:47:28,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 217.75) internal successors, (871), 4 states have internal predecessors, (871), 0 states have call successors, (0), 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 21:47:28,373 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:47:28,373 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:47:28,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-19 21:47:28,373 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:47:28,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:47:28,374 INFO L85 PathProgramCache]: Analyzing trace with hash -1706270672, now seen corresponding path program 1 times [2022-07-19 21:47:28,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:47:28,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185370569] [2022-07-19 21:47:28,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:47:28,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:47:28,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:47:29,113 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 21:47:29,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:47:29,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185370569] [2022-07-19 21:47:29,114 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185370569] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:47:29,114 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:47:29,115 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-19 21:47:29,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117481017] [2022-07-19 21:47:29,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:47:29,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-19 21:47:29,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:47:29,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-19 21:47:29,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-07-19 21:47:29,119 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 210 out of 269 [2022-07-19 21:47:29,121 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 240 transitions, 512 flow. Second operand has 8 states, 8 states have (on average 212.125) internal successors, (1697), 8 states have internal predecessors, (1697), 0 states have call successors, (0), 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 21:47:29,122 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:47:29,122 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 210 of 269 [2022-07-19 21:47:29,122 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:47:30,115 INFO L129 PetriNetUnfolder]: 577/2766 cut-off events. [2022-07-19 21:47:30,115 INFO L130 PetriNetUnfolder]: For 179/179 co-relation queries the response was YES. [2022-07-19 21:47:30,123 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3995 conditions, 2766 events. 577/2766 cut-off events. For 179/179 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 21162 event pairs, 153 based on Foata normal form. 0/2461 useless extension candidates. Maximal degree in co-relation 3988. Up to 368 conditions per place. [2022-07-19 21:47:30,132 INFO L132 encePairwiseOnDemand]: 256/269 looper letters, 170 selfloop transitions, 35 changer transitions 0/401 dead transitions. [2022-07-19 21:47:30,132 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 401 transitions, 1311 flow [2022-07-19 21:47:30,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-19 21:47:30,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-07-19 21:47:30,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 3571 transitions. [2022-07-19 21:47:30,140 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8296933085501859 [2022-07-19 21:47:30,140 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 3571 transitions. [2022-07-19 21:47:30,141 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 3571 transitions. [2022-07-19 21:47:30,142 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:47:30,142 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 3571 transitions. [2022-07-19 21:47:30,150 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 223.1875) internal successors, (3571), 16 states have internal predecessors, (3571), 0 states have call successors, (0), 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 21:47:30,157 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 269.0) internal successors, (4573), 17 states have internal predecessors, (4573), 0 states have call successors, (0), 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 21:47:30,160 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 269.0) internal successors, (4573), 17 states have internal predecessors, (4573), 0 states have call successors, (0), 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 21:47:30,160 INFO L186 Difference]: Start difference. First operand has 242 places, 240 transitions, 512 flow. Second operand 16 states and 3571 transitions. [2022-07-19 21:47:30,160 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 401 transitions, 1311 flow [2022-07-19 21:47:30,164 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 401 transitions, 1289 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-07-19 21:47:30,168 INFO L242 Difference]: Finished difference. Result has 264 places, 268 transitions, 739 flow [2022-07-19 21:47:30,168 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=269, PETRI_DIFFERENCE_MINUEND_FLOW=504, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=739, PETRI_PLACES=264, PETRI_TRANSITIONS=268} [2022-07-19 21:47:30,169 INFO L279 CegarLoopForPetriNet]: 241 programPoint places, 23 predicate places. [2022-07-19 21:47:30,169 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 268 transitions, 739 flow [2022-07-19 21:47:30,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 212.125) internal successors, (1697), 8 states have internal predecessors, (1697), 0 states have call successors, (0), 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 21:47:30,171 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:47:30,171 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:47:30,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-19 21:47:30,171 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:47:30,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:47:30,172 INFO L85 PathProgramCache]: Analyzing trace with hash -1578631382, now seen corresponding path program 1 times [2022-07-19 21:47:30,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:47:30,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539571422] [2022-07-19 21:47:30,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:47:30,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:47:30,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:47:30,305 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 21:47:30,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:47:30,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539571422] [2022-07-19 21:47:30,306 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539571422] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:47:30,306 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:47:30,306 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 21:47:30,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549845888] [2022-07-19 21:47:30,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:47:30,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 21:47:30,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:47:30,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 21:47:30,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-19 21:47:30,309 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 211 out of 269 [2022-07-19 21:47:30,310 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 268 transitions, 739 flow. Second operand has 5 states, 5 states have (on average 214.6) internal successors, (1073), 5 states have internal predecessors, (1073), 0 states have call successors, (0), 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 21:47:30,311 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:47:30,311 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 211 of 269 [2022-07-19 21:47:30,311 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:47:30,991 INFO L129 PetriNetUnfolder]: 572/2836 cut-off events. [2022-07-19 21:47:30,991 INFO L130 PetriNetUnfolder]: For 2987/2987 co-relation queries the response was YES. [2022-07-19 21:47:31,002 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5126 conditions, 2836 events. 572/2836 cut-off events. For 2987/2987 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 21878 event pairs, 282 based on Foata normal form. 2/2618 useless extension candidates. Maximal degree in co-relation 5109. Up to 580 conditions per place. [2022-07-19 21:47:31,014 INFO L132 encePairwiseOnDemand]: 261/269 looper letters, 118 selfloop transitions, 21 changer transitions 0/338 dead transitions. [2022-07-19 21:47:31,014 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 338 transitions, 1234 flow [2022-07-19 21:47:31,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-19 21:47:31,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-19 21:47:31,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1377 transitions. [2022-07-19 21:47:31,018 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8531598513011153 [2022-07-19 21:47:31,018 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1377 transitions. [2022-07-19 21:47:31,018 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1377 transitions. [2022-07-19 21:47:31,019 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:47:31,019 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1377 transitions. [2022-07-19 21:47:31,022 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 229.5) internal successors, (1377), 6 states have internal predecessors, (1377), 0 states have call successors, (0), 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 21:47:31,025 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 269.0) internal successors, (1883), 7 states have internal predecessors, (1883), 0 states have call successors, (0), 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 21:47:31,025 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 269.0) internal successors, (1883), 7 states have internal predecessors, (1883), 0 states have call successors, (0), 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 21:47:31,026 INFO L186 Difference]: Start difference. First operand has 264 places, 268 transitions, 739 flow. Second operand 6 states and 1377 transitions. [2022-07-19 21:47:31,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 338 transitions, 1234 flow [2022-07-19 21:47:31,040 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 338 transitions, 1218 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-07-19 21:47:31,043 INFO L242 Difference]: Finished difference. Result has 269 places, 270 transitions, 812 flow [2022-07-19 21:47:31,044 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=269, PETRI_DIFFERENCE_MINUEND_FLOW=725, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=268, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=812, PETRI_PLACES=269, PETRI_TRANSITIONS=270} [2022-07-19 21:47:31,045 INFO L279 CegarLoopForPetriNet]: 241 programPoint places, 28 predicate places. [2022-07-19 21:47:31,045 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 270 transitions, 812 flow [2022-07-19 21:47:31,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 214.6) internal successors, (1073), 5 states have internal predecessors, (1073), 0 states have call successors, (0), 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 21:47:31,046 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:47:31,046 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:47:31,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-19 21:47:31,047 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:47:31,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:47:31,047 INFO L85 PathProgramCache]: Analyzing trace with hash -1765536420, now seen corresponding path program 2 times [2022-07-19 21:47:31,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:47:31,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105421726] [2022-07-19 21:47:31,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:47:31,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:47:31,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:47:31,245 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 21:47:31,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:47:31,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105421726] [2022-07-19 21:47:31,246 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105421726] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:47:31,246 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:47:31,246 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-19 21:47:31,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162295670] [2022-07-19 21:47:31,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:47:31,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-19 21:47:31,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:47:31,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-19 21:47:31,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-07-19 21:47:31,251 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 212 out of 269 [2022-07-19 21:47:31,253 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 270 transitions, 812 flow. Second operand has 8 states, 8 states have (on average 214.375) internal successors, (1715), 8 states have internal predecessors, (1715), 0 states have call successors, (0), 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 21:47:31,253 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:47:31,253 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 212 of 269 [2022-07-19 21:47:31,253 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:47:31,768 INFO L129 PetriNetUnfolder]: 370/2045 cut-off events. [2022-07-19 21:47:31,768 INFO L130 PetriNetUnfolder]: For 3721/3851 co-relation queries the response was YES. [2022-07-19 21:47:31,775 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3789 conditions, 2045 events. 370/2045 cut-off events. For 3721/3851 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 14770 event pairs, 176 based on Foata normal form. 110/2004 useless extension candidates. Maximal degree in co-relation 3769. Up to 477 conditions per place. [2022-07-19 21:47:31,782 INFO L132 encePairwiseOnDemand]: 257/269 looper letters, 71 selfloop transitions, 22 changer transitions 0/304 dead transitions. [2022-07-19 21:47:31,783 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 304 transitions, 1223 flow [2022-07-19 21:47:31,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-19 21:47:31,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-07-19 21:47:31,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2197 transitions. [2022-07-19 21:47:31,788 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.816728624535316 [2022-07-19 21:47:31,788 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2197 transitions. [2022-07-19 21:47:31,788 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2197 transitions. [2022-07-19 21:47:31,789 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:47:31,789 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2197 transitions. [2022-07-19 21:47:31,793 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 219.7) internal successors, (2197), 10 states have internal predecessors, (2197), 0 states have call successors, (0), 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 21:47:31,797 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 269.0) internal successors, (2959), 11 states have internal predecessors, (2959), 0 states have call successors, (0), 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 21:47:31,798 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 269.0) internal successors, (2959), 11 states have internal predecessors, (2959), 0 states have call successors, (0), 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 21:47:31,798 INFO L186 Difference]: Start difference. First operand has 269 places, 270 transitions, 812 flow. Second operand 10 states and 2197 transitions. [2022-07-19 21:47:31,798 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 304 transitions, 1223 flow [2022-07-19 21:47:31,805 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 304 transitions, 1205 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-07-19 21:47:31,808 INFO L242 Difference]: Finished difference. Result has 280 places, 273 transitions, 870 flow [2022-07-19 21:47:31,809 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=269, PETRI_DIFFERENCE_MINUEND_FLOW=794, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=870, PETRI_PLACES=280, PETRI_TRANSITIONS=273} [2022-07-19 21:47:31,810 INFO L279 CegarLoopForPetriNet]: 241 programPoint places, 39 predicate places. [2022-07-19 21:47:31,810 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 273 transitions, 870 flow [2022-07-19 21:47:31,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 214.375) internal successors, (1715), 8 states have internal predecessors, (1715), 0 states have call successors, (0), 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 21:47:31,811 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:47:31,811 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:47:31,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-19 21:47:31,812 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:47:31,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:47:31,812 INFO L85 PathProgramCache]: Analyzing trace with hash 171126792, now seen corresponding path program 1 times [2022-07-19 21:47:31,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:47:31,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983035688] [2022-07-19 21:47:31,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:47:31,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:47:31,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:47:32,010 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 21:47:32,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:47:32,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983035688] [2022-07-19 21:47:32,012 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983035688] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:47:32,014 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:47:32,014 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-19 21:47:32,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654398954] [2022-07-19 21:47:32,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:47:32,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-19 21:47:32,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:47:32,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-19 21:47:32,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-07-19 21:47:32,020 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 211 out of 269 [2022-07-19 21:47:32,023 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 273 transitions, 870 flow. Second operand has 6 states, 6 states have (on average 214.33333333333334) internal successors, (1286), 6 states have internal predecessors, (1286), 0 states have call successors, (0), 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 21:47:32,027 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:47:32,027 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 211 of 269 [2022-07-19 21:47:32,027 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:47:32,568 INFO L129 PetriNetUnfolder]: 640/3292 cut-off events. [2022-07-19 21:47:32,569 INFO L130 PetriNetUnfolder]: For 4402/4411 co-relation queries the response was YES. [2022-07-19 21:47:32,581 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6373 conditions, 3292 events. 640/3292 cut-off events. For 4402/4411 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 26781 event pairs, 329 based on Foata normal form. 9/3077 useless extension candidates. Maximal degree in co-relation 6350. Up to 587 conditions per place. [2022-07-19 21:47:32,593 INFO L132 encePairwiseOnDemand]: 262/269 looper letters, 116 selfloop transitions, 28 changer transitions 0/344 dead transitions. [2022-07-19 21:47:32,594 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 344 transitions, 1449 flow [2022-07-19 21:47:32,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-19 21:47:32,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-19 21:47:32,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1374 transitions. [2022-07-19 21:47:32,598 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8513011152416357 [2022-07-19 21:47:32,598 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1374 transitions. [2022-07-19 21:47:32,598 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1374 transitions. [2022-07-19 21:47:32,599 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:47:32,599 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1374 transitions. [2022-07-19 21:47:32,602 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 229.0) internal successors, (1374), 6 states have internal predecessors, (1374), 0 states have call successors, (0), 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 21:47:32,605 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 269.0) internal successors, (1883), 7 states have internal predecessors, (1883), 0 states have call successors, (0), 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 21:47:32,605 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 269.0) internal successors, (1883), 7 states have internal predecessors, (1883), 0 states have call successors, (0), 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 21:47:32,606 INFO L186 Difference]: Start difference. First operand has 280 places, 273 transitions, 870 flow. Second operand 6 states and 1374 transitions. [2022-07-19 21:47:32,606 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 344 transitions, 1449 flow [2022-07-19 21:47:32,618 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 344 transitions, 1410 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-07-19 21:47:32,624 INFO L242 Difference]: Finished difference. Result has 283 places, 284 transitions, 1020 flow [2022-07-19 21:47:32,624 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=269, PETRI_DIFFERENCE_MINUEND_FLOW=844, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1020, PETRI_PLACES=283, PETRI_TRANSITIONS=284} [2022-07-19 21:47:32,625 INFO L279 CegarLoopForPetriNet]: 241 programPoint places, 42 predicate places. [2022-07-19 21:47:32,626 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 284 transitions, 1020 flow [2022-07-19 21:47:32,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 214.33333333333334) internal successors, (1286), 6 states have internal predecessors, (1286), 0 states have call successors, (0), 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 21:47:32,627 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:47:32,627 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:47:32,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-19 21:47:32,627 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:47:32,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:47:32,628 INFO L85 PathProgramCache]: Analyzing trace with hash 279090622, now seen corresponding path program 2 times [2022-07-19 21:47:32,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:47:32,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639457838] [2022-07-19 21:47:32,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:47:32,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:47:32,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:47:32,744 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 21:47:32,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:47:32,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639457838] [2022-07-19 21:47:32,745 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639457838] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:47:32,745 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:47:32,745 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 21:47:32,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26866673] [2022-07-19 21:47:32,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:47:32,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 21:47:32,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:47:32,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 21:47:32,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-19 21:47:32,748 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 211 out of 269 [2022-07-19 21:47:32,749 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 284 transitions, 1020 flow. Second operand has 5 states, 5 states have (on average 215.0) internal successors, (1075), 5 states have internal predecessors, (1075), 0 states have call successors, (0), 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 21:47:32,749 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:47:32,749 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 211 of 269 [2022-07-19 21:47:32,749 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:47:33,275 INFO L129 PetriNetUnfolder]: 608/3051 cut-off events. [2022-07-19 21:47:33,276 INFO L130 PetriNetUnfolder]: For 4387/4389 co-relation queries the response was YES. [2022-07-19 21:47:33,290 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6134 conditions, 3051 events. 608/3051 cut-off events. For 4387/4389 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 24248 event pairs, 285 based on Foata normal form. 4/2832 useless extension candidates. Maximal degree in co-relation 6107. Up to 587 conditions per place. [2022-07-19 21:47:33,303 INFO L132 encePairwiseOnDemand]: 262/269 looper letters, 102 selfloop transitions, 27 changer transitions 0/329 dead transitions. [2022-07-19 21:47:33,303 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 329 transitions, 1406 flow [2022-07-19 21:47:33,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-19 21:47:33,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-07-19 21:47:33,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1148 transitions. [2022-07-19 21:47:33,306 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8535315985130112 [2022-07-19 21:47:33,307 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1148 transitions. [2022-07-19 21:47:33,307 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1148 transitions. [2022-07-19 21:47:33,307 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:47:33,308 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1148 transitions. [2022-07-19 21:47:33,310 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 229.6) internal successors, (1148), 5 states have internal predecessors, (1148), 0 states have call successors, (0), 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 21:47:33,312 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 269.0) internal successors, (1614), 6 states have internal predecessors, (1614), 0 states have call successors, (0), 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 21:47:33,313 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 269.0) internal successors, (1614), 6 states have internal predecessors, (1614), 0 states have call successors, (0), 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 21:47:33,313 INFO L186 Difference]: Start difference. First operand has 283 places, 284 transitions, 1020 flow. Second operand 5 states and 1148 transitions. [2022-07-19 21:47:33,313 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 329 transitions, 1406 flow [2022-07-19 21:47:33,330 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 329 transitions, 1382 flow, removed 2 selfloop flow, removed 1 redundant places. [2022-07-19 21:47:33,334 INFO L242 Difference]: Finished difference. Result has 287 places, 284 transitions, 1055 flow [2022-07-19 21:47:33,334 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=269, PETRI_DIFFERENCE_MINUEND_FLOW=982, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=256, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1055, PETRI_PLACES=287, PETRI_TRANSITIONS=284} [2022-07-19 21:47:33,335 INFO L279 CegarLoopForPetriNet]: 241 programPoint places, 46 predicate places. [2022-07-19 21:47:33,335 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 284 transitions, 1055 flow [2022-07-19 21:47:33,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 215.0) internal successors, (1075), 5 states have internal predecessors, (1075), 0 states have call successors, (0), 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 21:47:33,336 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:47:33,336 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:47:33,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-19 21:47:33,337 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:47:33,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:47:33,338 INFO L85 PathProgramCache]: Analyzing trace with hash -109315002, now seen corresponding path program 3 times [2022-07-19 21:47:33,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:47:33,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594969529] [2022-07-19 21:47:33,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:47:33,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:47:33,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:47:33,470 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 21:47:33,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:47:33,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594969529] [2022-07-19 21:47:33,471 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594969529] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:47:33,471 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:47:33,472 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-19 21:47:33,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594675496] [2022-07-19 21:47:33,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:47:33,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-19 21:47:33,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:47:33,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-19 21:47:33,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-07-19 21:47:33,475 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 211 out of 269 [2022-07-19 21:47:33,476 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 284 transitions, 1055 flow. Second operand has 6 states, 6 states have (on average 214.33333333333334) internal successors, (1286), 6 states have internal predecessors, (1286), 0 states have call successors, (0), 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 21:47:33,476 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:47:33,476 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 211 of 269 [2022-07-19 21:47:33,476 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:47:34,050 INFO L129 PetriNetUnfolder]: 675/3430 cut-off events. [2022-07-19 21:47:34,051 INFO L130 PetriNetUnfolder]: For 5366/5376 co-relation queries the response was YES. [2022-07-19 21:47:34,066 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6835 conditions, 3430 events. 675/3430 cut-off events. For 5366/5376 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 28228 event pairs, 377 based on Foata normal form. 16/3207 useless extension candidates. Maximal degree in co-relation 6807. Up to 959 conditions per place. [2022-07-19 21:47:34,077 INFO L132 encePairwiseOnDemand]: 262/269 looper letters, 98 selfloop transitions, 26 changer transitions 0/324 dead transitions. [2022-07-19 21:47:34,077 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 324 transitions, 1490 flow [2022-07-19 21:47:34,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-19 21:47:34,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-19 21:47:34,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1354 transitions. [2022-07-19 21:47:34,081 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.838909541511772 [2022-07-19 21:47:34,081 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1354 transitions. [2022-07-19 21:47:34,081 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1354 transitions. [2022-07-19 21:47:34,082 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:47:34,082 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1354 transitions. [2022-07-19 21:47:34,084 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 225.66666666666666) internal successors, (1354), 6 states have internal predecessors, (1354), 0 states have call successors, (0), 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 21:47:34,087 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 269.0) internal successors, (1883), 7 states have internal predecessors, (1883), 0 states have call successors, (0), 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 21:47:34,088 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 269.0) internal successors, (1883), 7 states have internal predecessors, (1883), 0 states have call successors, (0), 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 21:47:34,088 INFO L186 Difference]: Start difference. First operand has 287 places, 284 transitions, 1055 flow. Second operand 6 states and 1354 transitions. [2022-07-19 21:47:34,088 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 324 transitions, 1490 flow [2022-07-19 21:47:34,101 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 324 transitions, 1433 flow, removed 1 selfloop flow, removed 3 redundant places. [2022-07-19 21:47:34,105 INFO L242 Difference]: Finished difference. Result has 290 places, 290 transitions, 1125 flow [2022-07-19 21:47:34,106 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=269, PETRI_DIFFERENCE_MINUEND_FLOW=1008, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1125, PETRI_PLACES=290, PETRI_TRANSITIONS=290} [2022-07-19 21:47:34,107 INFO L279 CegarLoopForPetriNet]: 241 programPoint places, 49 predicate places. [2022-07-19 21:47:34,107 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 290 transitions, 1125 flow [2022-07-19 21:47:34,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 214.33333333333334) internal successors, (1286), 6 states have internal predecessors, (1286), 0 states have call successors, (0), 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 21:47:34,108 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:47:34,108 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:47:34,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-19 21:47:34,108 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:47:34,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:47:34,109 INFO L85 PathProgramCache]: Analyzing trace with hash 826439992, now seen corresponding path program 4 times [2022-07-19 21:47:34,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:47:34,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498412419] [2022-07-19 21:47:34,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:47:34,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:47:34,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:47:34,188 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 21:47:34,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:47:34,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498412419] [2022-07-19 21:47:34,189 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498412419] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:47:34,189 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:47:34,190 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 21:47:34,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551928011] [2022-07-19 21:47:34,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:47:34,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 21:47:34,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:47:34,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 21:47:34,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-19 21:47:34,192 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 211 out of 269 [2022-07-19 21:47:34,193 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 290 transitions, 1125 flow. Second operand has 5 states, 5 states have (on average 215.0) internal successors, (1075), 5 states have internal predecessors, (1075), 0 states have call successors, (0), 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 21:47:34,193 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:47:34,194 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 211 of 269 [2022-07-19 21:47:34,194 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:47:34,705 INFO L129 PetriNetUnfolder]: 659/3303 cut-off events. [2022-07-19 21:47:34,705 INFO L130 PetriNetUnfolder]: For 4929/4941 co-relation queries the response was YES. [2022-07-19 21:47:34,720 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6578 conditions, 3303 events. 659/3303 cut-off events. For 4929/4941 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 26622 event pairs, 400 based on Foata normal form. 12/3081 useless extension candidates. Maximal degree in co-relation 6550. Up to 1014 conditions per place. [2022-07-19 21:47:34,732 INFO L132 encePairwiseOnDemand]: 262/269 looper letters, 84 selfloop transitions, 22 changer transitions 0/306 dead transitions. [2022-07-19 21:47:34,732 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 306 transitions, 1393 flow [2022-07-19 21:47:34,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-19 21:47:34,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-07-19 21:47:34,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1124 transitions. [2022-07-19 21:47:34,735 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8356877323420074 [2022-07-19 21:47:34,736 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1124 transitions. [2022-07-19 21:47:34,736 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1124 transitions. [2022-07-19 21:47:34,736 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:47:34,737 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1124 transitions. [2022-07-19 21:47:34,739 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 224.8) internal successors, (1124), 5 states have internal predecessors, (1124), 0 states have call successors, (0), 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 21:47:34,741 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 269.0) internal successors, (1614), 6 states have internal predecessors, (1614), 0 states have call successors, (0), 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 21:47:34,742 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 269.0) internal successors, (1614), 6 states have internal predecessors, (1614), 0 states have call successors, (0), 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 21:47:34,742 INFO L186 Difference]: Start difference. First operand has 290 places, 290 transitions, 1125 flow. Second operand 5 states and 1124 transitions. [2022-07-19 21:47:34,742 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 306 transitions, 1393 flow [2022-07-19 21:47:34,756 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 306 transitions, 1340 flow, removed 5 selfloop flow, removed 4 redundant places. [2022-07-19 21:47:34,760 INFO L242 Difference]: Finished difference. Result has 290 places, 289 transitions, 1104 flow [2022-07-19 21:47:34,761 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=269, PETRI_DIFFERENCE_MINUEND_FLOW=1060, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=267, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1104, PETRI_PLACES=290, PETRI_TRANSITIONS=289} [2022-07-19 21:47:34,761 INFO L279 CegarLoopForPetriNet]: 241 programPoint places, 49 predicate places. [2022-07-19 21:47:34,761 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 289 transitions, 1104 flow [2022-07-19 21:47:34,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 215.0) internal successors, (1075), 5 states have internal predecessors, (1075), 0 states have call successors, (0), 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 21:47:34,762 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:47:34,762 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:47:34,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-19 21:47:34,763 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:47:34,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:47:34,763 INFO L85 PathProgramCache]: Analyzing trace with hash -1687567350, now seen corresponding path program 5 times [2022-07-19 21:47:34,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:47:34,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456730160] [2022-07-19 21:47:34,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:47:34,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:47:34,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:47:34,916 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 21:47:34,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:47:34,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456730160] [2022-07-19 21:47:34,917 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456730160] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:47:34,917 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:47:34,917 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-19 21:47:34,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485479623] [2022-07-19 21:47:34,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:47:34,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-19 21:47:34,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:47:34,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-19 21:47:34,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-07-19 21:47:34,920 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 211 out of 269 [2022-07-19 21:47:34,921 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 289 transitions, 1104 flow. Second operand has 6 states, 6 states have (on average 214.33333333333334) internal successors, (1286), 6 states have internal predecessors, (1286), 0 states have call successors, (0), 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 21:47:34,921 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:47:34,921 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 211 of 269 [2022-07-19 21:47:34,921 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:47:35,535 INFO L129 PetriNetUnfolder]: 693/3479 cut-off events. [2022-07-19 21:47:35,535 INFO L130 PetriNetUnfolder]: For 5355/5365 co-relation queries the response was YES. [2022-07-19 21:47:35,553 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6869 conditions, 3479 events. 693/3479 cut-off events. For 5355/5365 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 28567 event pairs, 407 based on Foata normal form. 16/3251 useless extension candidates. Maximal degree in co-relation 6843. Up to 1025 conditions per place. [2022-07-19 21:47:35,570 INFO L132 encePairwiseOnDemand]: 262/269 looper letters, 98 selfloop transitions, 23 changer transitions 0/321 dead transitions. [2022-07-19 21:47:35,571 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 321 transitions, 1513 flow [2022-07-19 21:47:35,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-19 21:47:35,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-19 21:47:35,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1345 transitions. [2022-07-19 21:47:35,574 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8333333333333334 [2022-07-19 21:47:35,574 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1345 transitions. [2022-07-19 21:47:35,574 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1345 transitions. [2022-07-19 21:47:35,575 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:47:35,575 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1345 transitions. [2022-07-19 21:47:35,577 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 224.16666666666666) internal successors, (1345), 6 states have internal predecessors, (1345), 0 states have call successors, (0), 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 21:47:35,580 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 269.0) internal successors, (1883), 7 states have internal predecessors, (1883), 0 states have call successors, (0), 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 21:47:35,581 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 269.0) internal successors, (1883), 7 states have internal predecessors, (1883), 0 states have call successors, (0), 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 21:47:35,581 INFO L186 Difference]: Start difference. First operand has 290 places, 289 transitions, 1104 flow. Second operand 6 states and 1345 transitions. [2022-07-19 21:47:35,581 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 321 transitions, 1513 flow [2022-07-19 21:47:35,595 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 321 transitions, 1466 flow, removed 1 selfloop flow, removed 4 redundant places. [2022-07-19 21:47:35,599 INFO L242 Difference]: Finished difference. Result has 292 places, 292 transitions, 1147 flow [2022-07-19 21:47:35,600 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=269, PETRI_DIFFERENCE_MINUEND_FLOW=1057, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=266, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1147, PETRI_PLACES=292, PETRI_TRANSITIONS=292} [2022-07-19 21:47:35,600 INFO L279 CegarLoopForPetriNet]: 241 programPoint places, 51 predicate places. [2022-07-19 21:47:35,600 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 292 transitions, 1147 flow [2022-07-19 21:47:35,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 214.33333333333334) internal successors, (1286), 6 states have internal predecessors, (1286), 0 states have call successors, (0), 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 21:47:35,601 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:47:35,601 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:47:35,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-19 21:47:35,602 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:47:35,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:47:35,602 INFO L85 PathProgramCache]: Analyzing trace with hash 1951714480, now seen corresponding path program 6 times [2022-07-19 21:47:35,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:47:35,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805681460] [2022-07-19 21:47:35,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:47:35,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:47:35,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:47:35,761 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 21:47:35,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:47:35,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805681460] [2022-07-19 21:47:35,762 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805681460] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:47:35,762 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:47:35,762 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-19 21:47:35,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22047036] [2022-07-19 21:47:35,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:47:35,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-19 21:47:35,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:47:35,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-19 21:47:35,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-07-19 21:47:35,765 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 211 out of 269 [2022-07-19 21:47:35,766 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 292 transitions, 1147 flow. Second operand has 6 states, 6 states have (on average 214.33333333333334) internal successors, (1286), 6 states have internal predecessors, (1286), 0 states have call successors, (0), 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 21:47:35,766 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:47:35,766 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 211 of 269 [2022-07-19 21:47:35,766 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:47:36,308 INFO L129 PetriNetUnfolder]: 685/3459 cut-off events. [2022-07-19 21:47:36,308 INFO L130 PetriNetUnfolder]: For 5225/5231 co-relation queries the response was YES. [2022-07-19 21:47:36,325 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6780 conditions, 3459 events. 685/3459 cut-off events. For 5225/5231 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 28596 event pairs, 317 based on Foata normal form. 12/3232 useless extension candidates. Maximal degree in co-relation 6754. Up to 669 conditions per place. [2022-07-19 21:47:36,337 INFO L132 encePairwiseOnDemand]: 262/269 looper letters, 104 selfloop transitions, 29 changer transitions 0/333 dead transitions. [2022-07-19 21:47:36,337 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 333 transitions, 1584 flow [2022-07-19 21:47:36,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-19 21:47:36,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-19 21:47:36,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1573 transitions. [2022-07-19 21:47:36,341 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8353690918746681 [2022-07-19 21:47:36,342 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1573 transitions. [2022-07-19 21:47:36,342 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1573 transitions. [2022-07-19 21:47:36,342 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:47:36,343 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1573 transitions. [2022-07-19 21:47:36,346 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 224.71428571428572) internal successors, (1573), 7 states have internal predecessors, (1573), 0 states have call successors, (0), 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 21:47:36,348 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 269.0) internal successors, (2152), 8 states have internal predecessors, (2152), 0 states have call successors, (0), 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 21:47:36,349 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 269.0) internal successors, (2152), 8 states have internal predecessors, (2152), 0 states have call successors, (0), 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 21:47:36,349 INFO L186 Difference]: Start difference. First operand has 292 places, 292 transitions, 1147 flow. Second operand 7 states and 1573 transitions. [2022-07-19 21:47:36,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 333 transitions, 1584 flow [2022-07-19 21:47:36,364 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 333 transitions, 1537 flow, removed 3 selfloop flow, removed 4 redundant places. [2022-07-19 21:47:36,368 INFO L242 Difference]: Finished difference. Result has 294 places, 291 transitions, 1135 flow [2022-07-19 21:47:36,369 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=269, PETRI_DIFFERENCE_MINUEND_FLOW=1077, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=291, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=262, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1135, PETRI_PLACES=294, PETRI_TRANSITIONS=291} [2022-07-19 21:47:36,369 INFO L279 CegarLoopForPetriNet]: 241 programPoint places, 53 predicate places. [2022-07-19 21:47:36,370 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 291 transitions, 1135 flow [2022-07-19 21:47:36,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 214.33333333333334) internal successors, (1286), 6 states have internal predecessors, (1286), 0 states have call successors, (0), 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 21:47:36,370 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:47:36,370 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:47:36,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-19 21:47:36,371 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:47:36,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:47:36,371 INFO L85 PathProgramCache]: Analyzing trace with hash -1593733263, now seen corresponding path program 1 times [2022-07-19 21:47:36,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:47:36,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231263663] [2022-07-19 21:47:36,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:47:36,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:47:36,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:47:36,503 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:47:36,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:47:36,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231263663] [2022-07-19 21:47:36,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231263663] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:47:36,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226600204] [2022-07-19 21:47:36,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:47:36,504 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:47:36,504 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:47:36,511 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 21:47:36,519 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 21:47:36,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:47:36,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-19 21:47:36,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:47:36,875 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 21:47:36,876 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 21:47:36,876 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1226600204] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:47:36,876 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 21:47:36,876 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 14 [2022-07-19 21:47:36,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299708364] [2022-07-19 21:47:36,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:47:36,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-19 21:47:36,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:47:36,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-19 21:47:36,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2022-07-19 21:47:36,879 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 186 out of 269 [2022-07-19 21:47:36,881 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 291 transitions, 1135 flow. Second operand has 8 states, 8 states have (on average 189.5) internal successors, (1516), 8 states have internal predecessors, (1516), 0 states have call successors, (0), 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 21:47:36,881 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:47:36,881 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 186 of 269 [2022-07-19 21:47:36,881 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:47:37,418 INFO L129 PetriNetUnfolder]: 511/2593 cut-off events. [2022-07-19 21:47:37,418 INFO L130 PetriNetUnfolder]: For 1513/1527 co-relation queries the response was YES. [2022-07-19 21:47:37,435 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4549 conditions, 2593 events. 511/2593 cut-off events. For 1513/1527 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 21014 event pairs, 277 based on Foata normal form. 12/2414 useless extension candidates. Maximal degree in co-relation 4524. Up to 762 conditions per place. [2022-07-19 21:47:37,442 INFO L132 encePairwiseOnDemand]: 247/269 looper letters, 55 selfloop transitions, 15 changer transitions 18/314 dead transitions. [2022-07-19 21:47:37,442 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 314 transitions, 1363 flow [2022-07-19 21:47:37,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-19 21:47:37,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-07-19 21:47:37,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1950 transitions. [2022-07-19 21:47:37,447 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.724907063197026 [2022-07-19 21:47:37,447 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1950 transitions. [2022-07-19 21:47:37,447 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1950 transitions. [2022-07-19 21:47:37,449 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:47:37,449 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1950 transitions. [2022-07-19 21:47:37,452 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 195.0) internal successors, (1950), 10 states have internal predecessors, (1950), 0 states have call successors, (0), 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 21:47:37,456 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 269.0) internal successors, (2959), 11 states have internal predecessors, (2959), 0 states have call successors, (0), 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 21:47:37,457 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 269.0) internal successors, (2959), 11 states have internal predecessors, (2959), 0 states have call successors, (0), 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 21:47:37,457 INFO L186 Difference]: Start difference. First operand has 294 places, 291 transitions, 1135 flow. Second operand 10 states and 1950 transitions. [2022-07-19 21:47:37,457 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 314 transitions, 1363 flow [2022-07-19 21:47:37,467 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 314 transitions, 1286 flow, removed 3 selfloop flow, removed 6 redundant places. [2022-07-19 21:47:37,473 INFO L242 Difference]: Finished difference. Result has 301 places, 292 transitions, 1108 flow [2022-07-19 21:47:37,474 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=269, PETRI_DIFFERENCE_MINUEND_FLOW=1058, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=291, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=276, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1108, PETRI_PLACES=301, PETRI_TRANSITIONS=292} [2022-07-19 21:47:37,475 INFO L279 CegarLoopForPetriNet]: 241 programPoint places, 60 predicate places. [2022-07-19 21:47:37,476 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 292 transitions, 1108 flow [2022-07-19 21:47:37,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 189.5) internal successors, (1516), 8 states have internal predecessors, (1516), 0 states have call successors, (0), 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 21:47:37,476 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:47:37,477 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:47:37,503 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-19 21:47:37,701 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,SelfDestructingSolverStorable12 [2022-07-19 21:47:37,701 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:47:37,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:47:37,702 INFO L85 PathProgramCache]: Analyzing trace with hash -1256825081, now seen corresponding path program 1 times [2022-07-19 21:47:37,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:47:37,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896682139] [2022-07-19 21:47:37,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:47:37,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:47:37,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:47:37,958 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 21:47:37,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:47:37,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896682139] [2022-07-19 21:47:37,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896682139] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:47:37,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994289410] [2022-07-19 21:47:37,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:47:37,958 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:47:37,959 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:47:37,964 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 21:47:37,965 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 21:47:38,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:47:38,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 33 conjunts are in the unsatisfiable core [2022-07-19 21:47:38,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:47:38,714 INFO L356 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-07-19 21:47:38,714 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 10 [2022-07-19 21:47:38,809 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:47:38,809 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:47:39,335 INFO L356 Elim1Store]: treesize reduction 9, result has 43.8 percent of original size [2022-07-19 21:47:39,336 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 11 [2022-07-19 21:47:40,029 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:47:40,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [994289410] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:47:40,030 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:47:40,030 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 18, 18] total 36 [2022-07-19 21:47:40,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485735087] [2022-07-19 21:47:40,030 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:47:40,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-07-19 21:47:40,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:47:40,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-07-19 21:47:40,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1148, Unknown=0, NotChecked=0, Total=1260 [2022-07-19 21:47:40,036 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 269 [2022-07-19 21:47:40,039 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 292 transitions, 1108 flow. Second operand has 36 states, 36 states have (on average 105.41666666666667) internal successors, (3795), 36 states have internal predecessors, (3795), 0 states have call successors, (0), 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 21:47:40,039 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:47:40,039 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 269 [2022-07-19 21:47:40,039 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:48:02,806 INFO L129 PetriNetUnfolder]: 33764/71687 cut-off events. [2022-07-19 21:48:02,807 INFO L130 PetriNetUnfolder]: For 76370/76458 co-relation queries the response was YES. [2022-07-19 21:48:03,172 INFO L84 FinitePrefix]: Finished finitePrefix Result has 164649 conditions, 71687 events. 33764/71687 cut-off events. For 76370/76458 co-relation queries the response was YES. Maximal size of possible extension queue 943. Compared 759128 event pairs, 1109 based on Foata normal form. 170/70304 useless extension candidates. Maximal degree in co-relation 164621. Up to 10962 conditions per place. [2022-07-19 21:48:03,437 INFO L132 encePairwiseOnDemand]: 191/269 looper letters, 2380 selfloop transitions, 592 changer transitions 473/3537 dead transitions. [2022-07-19 21:48:03,437 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 485 places, 3537 transitions, 19241 flow [2022-07-19 21:48:03,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 188 states. [2022-07-19 21:48:03,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2022-07-19 21:48:03,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 21758 transitions. [2022-07-19 21:48:03,488 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.4302380764059163 [2022-07-19 21:48:03,488 INFO L72 ComplementDD]: Start complementDD. Operand 188 states and 21758 transitions. [2022-07-19 21:48:03,488 INFO L73 IsDeterministic]: Start isDeterministic. Operand 188 states and 21758 transitions. [2022-07-19 21:48:03,502 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:48:03,503 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 188 states and 21758 transitions. [2022-07-19 21:48:03,545 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 189 states, 188 states have (on average 115.73404255319149) internal successors, (21758), 188 states have internal predecessors, (21758), 0 states have call successors, (0), 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 21:48:03,621 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 189 states, 189 states have (on average 269.0) internal successors, (50841), 189 states have internal predecessors, (50841), 0 states have call successors, (0), 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 21:48:03,642 INFO L81 ComplementDD]: Finished complementDD. Result has 189 states, 189 states have (on average 269.0) internal successors, (50841), 189 states have internal predecessors, (50841), 0 states have call successors, (0), 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 21:48:03,643 INFO L186 Difference]: Start difference. First operand has 301 places, 292 transitions, 1108 flow. Second operand 188 states and 21758 transitions. [2022-07-19 21:48:03,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 485 places, 3537 transitions, 19241 flow [2022-07-19 21:48:04,478 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 478 places, 3537 transitions, 18407 flow, removed 288 selfloop flow, removed 7 redundant places. [2022-07-19 21:48:04,507 INFO L242 Difference]: Finished difference. Result has 598 places, 901 transitions, 6589 flow [2022-07-19 21:48:04,508 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=269, PETRI_DIFFERENCE_MINUEND_FLOW=1077, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=292, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=188, PETRI_FLOW=6589, PETRI_PLACES=598, PETRI_TRANSITIONS=901} [2022-07-19 21:48:04,508 INFO L279 CegarLoopForPetriNet]: 241 programPoint places, 357 predicate places. [2022-07-19 21:48:04,508 INFO L495 AbstractCegarLoop]: Abstraction has has 598 places, 901 transitions, 6589 flow [2022-07-19 21:48:04,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 105.41666666666667) internal successors, (3795), 36 states have internal predecessors, (3795), 0 states have call successors, (0), 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 21:48:04,510 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:48:04,510 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:48:04,537 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 21:48:04,734 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,SelfDestructingSolverStorable13 [2022-07-19 21:48:04,735 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:48:04,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:48:04,735 INFO L85 PathProgramCache]: Analyzing trace with hash 1477762169, now seen corresponding path program 2 times [2022-07-19 21:48:04,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:48:04,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372047098] [2022-07-19 21:48:04,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:48:04,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:48:04,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:48:05,176 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 21:48:05,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:48:05,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372047098] [2022-07-19 21:48:05,176 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372047098] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:48:05,176 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:48:05,176 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-07-19 21:48:05,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270342327] [2022-07-19 21:48:05,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:48:05,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-19 21:48:05,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:48:05,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-19 21:48:05,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-07-19 21:48:05,179 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 208 out of 269 [2022-07-19 21:48:05,181 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 598 places, 901 transitions, 6589 flow. Second operand has 11 states, 11 states have (on average 210.36363636363637) internal successors, (2314), 11 states have internal predecessors, (2314), 0 states have call successors, (0), 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 21:48:05,181 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:48:05,181 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 208 of 269 [2022-07-19 21:48:05,181 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:48:10,338 INFO L129 PetriNetUnfolder]: 3629/15604 cut-off events. [2022-07-19 21:48:10,338 INFO L130 PetriNetUnfolder]: For 122063/122563 co-relation queries the response was YES. [2022-07-19 21:48:10,545 INFO L84 FinitePrefix]: Finished finitePrefix Result has 56688 conditions, 15604 events. 3629/15604 cut-off events. For 122063/122563 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 170724 event pairs, 1208 based on Foata normal form. 107/15149 useless extension candidates. Maximal degree in co-relation 56543. Up to 2787 conditions per place. [2022-07-19 21:48:10,613 INFO L132 encePairwiseOnDemand]: 253/269 looper letters, 282 selfloop transitions, 228 changer transitions 0/1089 dead transitions. [2022-07-19 21:48:10,613 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 553 places, 1089 transitions, 8786 flow [2022-07-19 21:48:10,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-19 21:48:10,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-07-19 21:48:10,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 3278 transitions. [2022-07-19 21:48:10,618 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8123915737298637 [2022-07-19 21:48:10,618 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 3278 transitions. [2022-07-19 21:48:10,618 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 3278 transitions. [2022-07-19 21:48:10,619 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:48:10,619 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 3278 transitions. [2022-07-19 21:48:10,623 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 218.53333333333333) internal successors, (3278), 15 states have internal predecessors, (3278), 0 states have call successors, (0), 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 21:48:10,628 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 269.0) internal successors, (4304), 16 states have internal predecessors, (4304), 0 states have call successors, (0), 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 21:48:10,629 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 269.0) internal successors, (4304), 16 states have internal predecessors, (4304), 0 states have call successors, (0), 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 21:48:10,629 INFO L186 Difference]: Start difference. First operand has 598 places, 901 transitions, 6589 flow. Second operand 15 states and 3278 transitions. [2022-07-19 21:48:10,629 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 553 places, 1089 transitions, 8786 flow [2022-07-19 21:48:11,265 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 535 places, 1089 transitions, 8600 flow, removed 50 selfloop flow, removed 18 redundant places. [2022-07-19 21:48:11,278 INFO L242 Difference]: Finished difference. Result has 545 places, 937 transitions, 7381 flow [2022-07-19 21:48:11,279 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=269, PETRI_DIFFERENCE_MINUEND_FLOW=6461, PETRI_DIFFERENCE_MINUEND_PLACES=521, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=901, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=192, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=694, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=7381, PETRI_PLACES=545, PETRI_TRANSITIONS=937} [2022-07-19 21:48:11,279 INFO L279 CegarLoopForPetriNet]: 241 programPoint places, 304 predicate places. [2022-07-19 21:48:11,279 INFO L495 AbstractCegarLoop]: Abstraction has has 545 places, 937 transitions, 7381 flow [2022-07-19 21:48:11,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 210.36363636363637) internal successors, (2314), 11 states have internal predecessors, (2314), 0 states have call successors, (0), 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 21:48:11,280 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:48:11,280 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:48:11,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-19 21:48:11,281 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:48:11,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:48:11,281 INFO L85 PathProgramCache]: Analyzing trace with hash 1542483443, now seen corresponding path program 3 times [2022-07-19 21:48:11,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:48:11,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482544869] [2022-07-19 21:48:11,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:48:11,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:48:11,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:48:11,512 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 21:48:11,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:48:11,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482544869] [2022-07-19 21:48:11,513 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482544869] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:48:11,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876941006] [2022-07-19 21:48:11,513 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 21:48:11,513 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:48:11,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:48:11,520 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 21:48:11,521 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 21:48:11,618 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-07-19 21:48:11,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:48:11,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 52 conjunts are in the unsatisfiable core [2022-07-19 21:48:11,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:48:12,023 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-19 21:48:12,288 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-19 21:48:12,357 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-19 21:48:12,754 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-19 21:48:12,755 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-19 21:48:12,756 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2022-07-19 21:48:12,841 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:48:12,842 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:48:14,004 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-19 21:48:14,005 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 44 [2022-07-19 21:48:14,017 INFO L356 Elim1Store]: treesize reduction 9, result has 43.8 percent of original size [2022-07-19 21:48:14,018 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 94 treesize of output 85 [2022-07-19 21:48:14,028 INFO L356 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-07-19 21:48:14,029 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 54 [2022-07-19 21:48:14,042 INFO L356 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-07-19 21:48:14,042 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 20 [2022-07-19 21:48:14,452 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:48:14,452 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1876941006] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:48:14,452 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:48:14,452 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 27, 24] total 51 [2022-07-19 21:48:14,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378937280] [2022-07-19 21:48:14,453 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:48:14,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-07-19 21:48:14,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:48:14,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-07-19 21:48:14,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=2254, Unknown=60, NotChecked=0, Total=2550 [2022-07-19 21:48:14,461 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 269 [2022-07-19 21:48:14,465 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 545 places, 937 transitions, 7381 flow. Second operand has 51 states, 51 states have (on average 90.07843137254902) internal successors, (4594), 51 states have internal predecessors, (4594), 0 states have call successors, (0), 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 21:48:14,465 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:48:14,465 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 269 [2022-07-19 21:48:14,465 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand