./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/chl-word-symm.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 35987657 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/chl-word-symm.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 4ca4c99e545bc332635ee8b9969d24118d6fd539f8535aa6ae4c72d296ec330e --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-21 09:00:17,430 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-21 09:00:17,433 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-21 09:00:17,473 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-21 09:00:17,474 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-21 09:00:17,475 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-21 09:00:17,479 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-21 09:00:17,482 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-21 09:00:17,484 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-21 09:00:17,489 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-21 09:00:17,495 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-21 09:00:17,497 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-21 09:00:17,498 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-21 09:00:17,500 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-21 09:00:17,501 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-21 09:00:17,506 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-21 09:00:17,507 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-21 09:00:17,508 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-21 09:00:17,510 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-21 09:00:17,515 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-21 09:00:17,517 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-21 09:00:17,518 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-21 09:00:17,519 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-21 09:00:17,521 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-21 09:00:17,521 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-21 09:00:17,523 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-21 09:00:17,523 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-21 09:00:17,524 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-21 09:00:17,524 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-21 09:00:17,525 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-21 09:00:17,526 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-21 09:00:17,526 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-21 09:00:17,528 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-21 09:00:17,528 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-21 09:00:17,530 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-21 09:00:17,530 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-21 09:00:17,531 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-21 09:00:17,531 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-21 09:00:17,531 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-21 09:00:17,532 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-21 09:00:17,532 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-21 09:00:17,534 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-21 09:00:17,539 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-21 09:00:17,569 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-21 09:00:17,569 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-21 09:00:17,570 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-21 09:00:17,570 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-21 09:00:17,571 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-21 09:00:17,571 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-21 09:00:17,572 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-21 09:00:17,572 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-21 09:00:17,572 INFO L138 SettingsManager]: * Use SBE=true [2022-07-21 09:00:17,573 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-21 09:00:17,573 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-21 09:00:17,573 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-21 09:00:17,574 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-21 09:00:17,574 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-21 09:00:17,574 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-21 09:00:17,574 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-21 09:00:17,575 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-21 09:00:17,575 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-21 09:00:17,575 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-21 09:00:17,575 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-21 09:00:17,575 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-21 09:00:17,576 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-21 09:00:17,576 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-21 09:00:17,576 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-21 09:00:17,576 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 09:00:17,577 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-21 09:00:17,577 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-21 09:00:17,577 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-21 09:00:17,577 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-21 09:00:17,577 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-21 09:00:17,578 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-21 09:00:17,578 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-21 09:00:17,578 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-21 09:00:17,578 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4ca4c99e545bc332635ee8b9969d24118d6fd539f8535aa6ae4c72d296ec330e [2022-07-21 09:00:17,917 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-21 09:00:17,950 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-21 09:00:17,953 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-21 09:00:17,954 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-21 09:00:17,955 INFO L275 PluginConnector]: CDTParser initialized [2022-07-21 09:00:17,957 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/chl-word-symm.wvr.c [2022-07-21 09:00:18,015 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/adf7e46ad/30d863c2daa04a8a878c33b452c1354e/FLAG83df162a8 [2022-07-21 09:00:18,491 INFO L306 CDTParser]: Found 1 translation units. [2022-07-21 09:00:18,491 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-word-symm.wvr.c [2022-07-21 09:00:18,500 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/adf7e46ad/30d863c2daa04a8a878c33b452c1354e/FLAG83df162a8 [2022-07-21 09:00:18,898 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/adf7e46ad/30d863c2daa04a8a878c33b452c1354e [2022-07-21 09:00:18,901 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-21 09:00:18,903 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-21 09:00:18,906 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-21 09:00:18,906 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-21 09:00:18,910 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-21 09:00:18,910 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 09:00:18" (1/1) ... [2022-07-21 09:00:18,911 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1498e664 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:00:18, skipping insertion in model container [2022-07-21 09:00:18,912 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 09:00:18" (1/1) ... [2022-07-21 09:00:18,918 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-21 09:00:18,941 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-21 09:00:19,123 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/chl-word-symm.wvr.c[2848,2861] [2022-07-21 09:00:19,168 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 09:00:19,175 INFO L203 MainTranslator]: Completed pre-run [2022-07-21 09:00:19,194 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/chl-word-symm.wvr.c[2848,2861] [2022-07-21 09:00:19,196 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 09:00:19,208 INFO L208 MainTranslator]: Completed translation [2022-07-21 09:00:19,209 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:00:19 WrapperNode [2022-07-21 09:00:19,209 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-21 09:00:19,210 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-21 09:00:19,210 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-21 09:00:19,210 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-21 09:00:19,216 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:00:19" (1/1) ... [2022-07-21 09:00:19,223 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:00:19" (1/1) ... [2022-07-21 09:00:19,242 INFO L137 Inliner]: procedures = 24, calls = 35, calls flagged for inlining = 9, calls inlined = 11, statements flattened = 128 [2022-07-21 09:00:19,243 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-21 09:00:19,243 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-21 09:00:19,244 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-21 09:00:19,244 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-21 09:00:19,251 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:00:19" (1/1) ... [2022-07-21 09:00:19,251 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:00:19" (1/1) ... [2022-07-21 09:00:19,254 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:00:19" (1/1) ... [2022-07-21 09:00:19,254 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:00:19" (1/1) ... [2022-07-21 09:00:19,262 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:00:19" (1/1) ... [2022-07-21 09:00:19,266 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:00:19" (1/1) ... [2022-07-21 09:00:19,268 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:00:19" (1/1) ... [2022-07-21 09:00:19,270 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-21 09:00:19,271 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-21 09:00:19,271 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-21 09:00:19,271 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-21 09:00:19,272 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:00:19" (1/1) ... [2022-07-21 09:00:19,277 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 09:00:19,294 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:00:19,308 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) [2022-07-21 09:00:19,328 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 [2022-07-21 09:00:19,351 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-21 09:00:19,352 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-07-21 09:00:19,352 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-07-21 09:00:19,352 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-07-21 09:00:19,352 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-07-21 09:00:19,352 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-21 09:00:19,353 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-21 09:00:19,353 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-21 09:00:19,353 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-21 09:00:19,354 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-21 09:00:19,354 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-21 09:00:19,354 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-21 09:00:19,354 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-21 09:00:19,356 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-21 09:00:19,461 INFO L234 CfgBuilder]: Building ICFG [2022-07-21 09:00:19,462 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-21 09:00:19,794 INFO L275 CfgBuilder]: Performing block encoding [2022-07-21 09:00:19,803 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-21 09:00:19,803 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2022-07-21 09:00:19,805 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 09:00:19 BoogieIcfgContainer [2022-07-21 09:00:19,805 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-21 09:00:19,807 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-21 09:00:19,807 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-21 09:00:19,809 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-21 09:00:19,810 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 09:00:18" (1/3) ... [2022-07-21 09:00:19,810 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54fd1151 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 09:00:19, skipping insertion in model container [2022-07-21 09:00:19,810 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:00:19" (2/3) ... [2022-07-21 09:00:19,810 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54fd1151 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 09:00:19, skipping insertion in model container [2022-07-21 09:00:19,810 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 09:00:19" (3/3) ... [2022-07-21 09:00:19,812 INFO L111 eAbstractionObserver]: Analyzing ICFG chl-word-symm.wvr.c [2022-07-21 09:00:19,816 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-21 09:00:19,823 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-21 09:00:19,823 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-21 09:00:19,823 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-21 09:00:19,899 INFO L135 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-07-21 09:00:19,934 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 228 places, 246 transitions, 508 flow [2022-07-21 09:00:20,030 INFO L129 PetriNetUnfolder]: 25/244 cut-off events. [2022-07-21 09:00:20,031 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-21 09:00:20,044 INFO L84 FinitePrefix]: Finished finitePrefix Result has 253 conditions, 244 events. 25/244 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 311 event pairs, 0 based on Foata normal form. 0/218 useless extension candidates. Maximal degree in co-relation 163. Up to 3 conditions per place. [2022-07-21 09:00:20,044 INFO L82 GeneralOperation]: Start removeDead. Operand has 228 places, 246 transitions, 508 flow [2022-07-21 09:00:20,050 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 217 places, 235 transitions, 482 flow [2022-07-21 09:00:20,061 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 09:00:20,067 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@2a2e2ac2, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@2cae49b8 [2022-07-21 09:00:20,068 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-07-21 09:00:20,123 INFO L129 PetriNetUnfolder]: 25/234 cut-off events. [2022-07-21 09:00:20,129 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-21 09:00:20,129 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:00:20,130 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] [2022-07-21 09:00:20,131 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:00:20,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:00:20,136 INFO L85 PathProgramCache]: Analyzing trace with hash 1778435912, now seen corresponding path program 1 times [2022-07-21 09:00:20,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:00:20,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071029455] [2022-07-21 09:00:20,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:00:20,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:00:20,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:00:20,377 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:00:20,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:00:20,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071029455] [2022-07-21 09:00:20,379 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071029455] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:00:20,379 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:00:20,379 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 09:00:20,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380601812] [2022-07-21 09:00:20,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:00:20,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-21 09:00:20,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:00:20,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-21 09:00:20,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-21 09:00:20,423 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 230 out of 246 [2022-07-21 09:00:20,429 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 235 transitions, 482 flow. Second operand has 2 states, 2 states have (on average 232.5) internal successors, (465), 2 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:00:20,429 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:00:20,429 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 230 of 246 [2022-07-21 09:00:20,431 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:00:20,507 INFO L129 PetriNetUnfolder]: 14/224 cut-off events. [2022-07-21 09:00:20,508 INFO L130 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2022-07-21 09:00:20,510 INFO L84 FinitePrefix]: Finished finitePrefix Result has 238 conditions, 224 events. 14/224 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 285 event pairs, 0 based on Foata normal form. 13/216 useless extension candidates. Maximal degree in co-relation 157. Up to 5 conditions per place. [2022-07-21 09:00:20,513 INFO L132 encePairwiseOnDemand]: 235/246 looper letters, 4 selfloop transitions, 0 changer transitions 7/224 dead transitions. [2022-07-21 09:00:20,513 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 224 transitions, 468 flow [2022-07-21 09:00:20,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-21 09:00:20,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-21 09:00:20,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 475 transitions. [2022-07-21 09:00:20,533 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9654471544715447 [2022-07-21 09:00:20,533 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 475 transitions. [2022-07-21 09:00:20,534 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 475 transitions. [2022-07-21 09:00:20,537 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:00:20,539 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 475 transitions. [2022-07-21 09:00:20,544 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 237.5) internal successors, (475), 2 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:00:20,551 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 246.0) internal successors, (738), 3 states have internal predecessors, (738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:00:20,551 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 246.0) internal successors, (738), 3 states have internal predecessors, (738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:00:20,553 INFO L186 Difference]: Start difference. First operand has 217 places, 235 transitions, 482 flow. Second operand 2 states and 475 transitions. [2022-07-21 09:00:20,554 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 224 transitions, 468 flow [2022-07-21 09:00:20,558 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 224 transitions, 460 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-07-21 09:00:20,564 INFO L242 Difference]: Finished difference. Result has 214 places, 217 transitions, 438 flow [2022-07-21 09:00:20,566 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=452, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=438, PETRI_PLACES=214, PETRI_TRANSITIONS=217} [2022-07-21 09:00:20,572 INFO L279 CegarLoopForPetriNet]: 217 programPoint places, -3 predicate places. [2022-07-21 09:00:20,573 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 217 transitions, 438 flow [2022-07-21 09:00:20,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 232.5) internal successors, (465), 2 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:00:20,574 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:00:20,575 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] [2022-07-21 09:00:20,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-21 09:00:20,575 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:00:20,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:00:20,577 INFO L85 PathProgramCache]: Analyzing trace with hash 1021980779, now seen corresponding path program 1 times [2022-07-21 09:00:20,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:00:20,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959468047] [2022-07-21 09:00:20,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:00:20,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:00:20,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:00:20,771 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:00:20,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:00:20,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959468047] [2022-07-21 09:00:20,773 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959468047] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:00:20,773 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:00:20,773 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 09:00:20,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879544115] [2022-07-21 09:00:20,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:00:20,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 09:00:20,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:00:20,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 09:00:20,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 09:00:20,780 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 226 out of 246 [2022-07-21 09:00:20,781 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 217 transitions, 438 flow. Second operand has 3 states, 3 states have (on average 228.0) internal successors, (684), 3 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:00:20,781 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:00:20,781 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 226 of 246 [2022-07-21 09:00:20,781 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:00:20,833 INFO L129 PetriNetUnfolder]: 26/304 cut-off events. [2022-07-21 09:00:20,833 INFO L130 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2022-07-21 09:00:20,835 INFO L84 FinitePrefix]: Finished finitePrefix Result has 336 conditions, 304 events. 26/304 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 674 event pairs, 1 based on Foata normal form. 0/281 useless extension candidates. Maximal degree in co-relation 333. Up to 14 conditions per place. [2022-07-21 09:00:20,848 INFO L132 encePairwiseOnDemand]: 243/246 looper letters, 10 selfloop transitions, 2 changer transitions 0/221 dead transitions. [2022-07-21 09:00:20,849 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 221 transitions, 473 flow [2022-07-21 09:00:20,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 09:00:20,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-21 09:00:20,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 691 transitions. [2022-07-21 09:00:20,853 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9363143631436315 [2022-07-21 09:00:20,853 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 691 transitions. [2022-07-21 09:00:20,854 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 691 transitions. [2022-07-21 09:00:20,854 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:00:20,854 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 691 transitions. [2022-07-21 09:00:20,856 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 230.33333333333334) internal successors, (691), 3 states have internal predecessors, (691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:00:20,858 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 246.0) internal successors, (984), 4 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:00:20,858 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 246.0) internal successors, (984), 4 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:00:20,858 INFO L186 Difference]: Start difference. First operand has 214 places, 217 transitions, 438 flow. Second operand 3 states and 691 transitions. [2022-07-21 09:00:20,858 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 221 transitions, 473 flow [2022-07-21 09:00:20,864 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 221 transitions, 473 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-21 09:00:20,867 INFO L242 Difference]: Finished difference. Result has 210 places, 217 transitions, 446 flow [2022-07-21 09:00:20,869 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=438, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=446, PETRI_PLACES=210, PETRI_TRANSITIONS=217} [2022-07-21 09:00:20,870 INFO L279 CegarLoopForPetriNet]: 217 programPoint places, -7 predicate places. [2022-07-21 09:00:20,870 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 217 transitions, 446 flow [2022-07-21 09:00:20,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 228.0) internal successors, (684), 3 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:00:20,871 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:00:20,871 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] [2022-07-21 09:00:20,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-21 09:00:20,873 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:00:20,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:00:20,873 INFO L85 PathProgramCache]: Analyzing trace with hash -107466911, now seen corresponding path program 1 times [2022-07-21 09:00:20,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:00:20,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46502967] [2022-07-21 09:00:20,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:00:20,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:00:20,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:00:21,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:00:21,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:00:21,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46502967] [2022-07-21 09:00:21,021 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46502967] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:00:21,022 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:00:21,022 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 09:00:21,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303368167] [2022-07-21 09:00:21,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:00:21,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 09:00:21,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:00:21,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 09:00:21,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 09:00:21,028 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 218 out of 246 [2022-07-21 09:00:21,029 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 217 transitions, 446 flow. Second operand has 3 states, 3 states have (on average 221.66666666666666) internal successors, (665), 3 states have internal predecessors, (665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:00:21,029 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:00:21,029 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 218 of 246 [2022-07-21 09:00:21,029 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:00:21,119 INFO L129 PetriNetUnfolder]: 53/486 cut-off events. [2022-07-21 09:00:21,119 INFO L130 PetriNetUnfolder]: For 21/21 co-relation queries the response was YES. [2022-07-21 09:00:21,122 INFO L84 FinitePrefix]: Finished finitePrefix Result has 584 conditions, 486 events. 53/486 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1829 event pairs, 17 based on Foata normal form. 0/440 useless extension candidates. Maximal degree in co-relation 579. Up to 57 conditions per place. [2022-07-21 09:00:21,124 INFO L132 encePairwiseOnDemand]: 242/246 looper letters, 19 selfloop transitions, 2 changer transitions 0/222 dead transitions. [2022-07-21 09:00:21,125 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 222 transitions, 501 flow [2022-07-21 09:00:21,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 09:00:21,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-21 09:00:21,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 677 transitions. [2022-07-21 09:00:21,127 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9173441734417345 [2022-07-21 09:00:21,128 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 677 transitions. [2022-07-21 09:00:21,128 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 677 transitions. [2022-07-21 09:00:21,128 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:00:21,128 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 677 transitions. [2022-07-21 09:00:21,131 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 225.66666666666666) internal successors, (677), 3 states have internal predecessors, (677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:00:21,133 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 246.0) internal successors, (984), 4 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:00:21,134 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 246.0) internal successors, (984), 4 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:00:21,134 INFO L186 Difference]: Start difference. First operand has 210 places, 217 transitions, 446 flow. Second operand 3 states and 677 transitions. [2022-07-21 09:00:21,135 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 222 transitions, 501 flow [2022-07-21 09:00:21,138 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 222 transitions, 497 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-07-21 09:00:21,143 INFO L242 Difference]: Finished difference. Result has 212 places, 219 transitions, 462 flow [2022-07-21 09:00:21,144 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=442, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=462, PETRI_PLACES=212, PETRI_TRANSITIONS=219} [2022-07-21 09:00:21,145 INFO L279 CegarLoopForPetriNet]: 217 programPoint places, -5 predicate places. [2022-07-21 09:00:21,145 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 219 transitions, 462 flow [2022-07-21 09:00:21,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 221.66666666666666) internal successors, (665), 3 states have internal predecessors, (665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:00:21,146 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:00:21,146 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] [2022-07-21 09:00:21,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-21 09:00:21,147 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:00:21,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:00:21,147 INFO L85 PathProgramCache]: Analyzing trace with hash -18316489, now seen corresponding path program 2 times [2022-07-21 09:00:21,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:00:21,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426348686] [2022-07-21 09:00:21,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:00:21,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:00:21,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:00:21,250 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:00:21,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:00:21,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426348686] [2022-07-21 09:00:21,251 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426348686] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:00:21,251 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:00:21,251 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 09:00:21,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584131663] [2022-07-21 09:00:21,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:00:21,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 09:00:21,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:00:21,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 09:00:21,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 09:00:21,254 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 218 out of 246 [2022-07-21 09:00:21,255 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 219 transitions, 462 flow. Second operand has 3 states, 3 states have (on average 221.66666666666666) internal successors, (665), 3 states have internal predecessors, (665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:00:21,255 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:00:21,256 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 218 of 246 [2022-07-21 09:00:21,256 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:00:21,326 INFO L129 PetriNetUnfolder]: 47/435 cut-off events. [2022-07-21 09:00:21,327 INFO L130 PetriNetUnfolder]: For 41/42 co-relation queries the response was YES. [2022-07-21 09:00:21,328 INFO L84 FinitePrefix]: Finished finitePrefix Result has 527 conditions, 435 events. 47/435 cut-off events. For 41/42 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 1422 event pairs, 14 based on Foata normal form. 4/400 useless extension candidates. Maximal degree in co-relation 521. Up to 45 conditions per place. [2022-07-21 09:00:21,329 INFO L132 encePairwiseOnDemand]: 242/246 looper letters, 21 selfloop transitions, 2 changer transitions 0/224 dead transitions. [2022-07-21 09:00:21,330 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 224 transitions, 525 flow [2022-07-21 09:00:21,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 09:00:21,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-21 09:00:21,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 677 transitions. [2022-07-21 09:00:21,332 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9173441734417345 [2022-07-21 09:00:21,332 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 677 transitions. [2022-07-21 09:00:21,333 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 677 transitions. [2022-07-21 09:00:21,333 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:00:21,333 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 677 transitions. [2022-07-21 09:00:21,335 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 225.66666666666666) internal successors, (677), 3 states have internal predecessors, (677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:00:21,336 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 246.0) internal successors, (984), 4 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:00:21,337 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 246.0) internal successors, (984), 4 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:00:21,337 INFO L186 Difference]: Start difference. First operand has 212 places, 219 transitions, 462 flow. Second operand 3 states and 677 transitions. [2022-07-21 09:00:21,337 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 224 transitions, 525 flow [2022-07-21 09:00:21,339 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 224 transitions, 523 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-21 09:00:21,343 INFO L242 Difference]: Finished difference. Result has 215 places, 221 transitions, 484 flow [2022-07-21 09:00:21,343 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=460, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=484, PETRI_PLACES=215, PETRI_TRANSITIONS=221} [2022-07-21 09:00:21,345 INFO L279 CegarLoopForPetriNet]: 217 programPoint places, -2 predicate places. [2022-07-21 09:00:21,345 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 221 transitions, 484 flow [2022-07-21 09:00:21,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 221.66666666666666) internal successors, (665), 3 states have internal predecessors, (665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:00:21,350 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:00:21,350 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] [2022-07-21 09:00:21,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-21 09:00:21,351 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:00:21,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:00:21,353 INFO L85 PathProgramCache]: Analyzing trace with hash 1122073423, now seen corresponding path program 1 times [2022-07-21 09:00:21,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:00:21,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618479205] [2022-07-21 09:00:21,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:00:21,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:00:21,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:00:21,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:00:21,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:00:21,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618479205] [2022-07-21 09:00:21,474 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618479205] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:00:21,474 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:00:21,474 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 09:00:21,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591813042] [2022-07-21 09:00:21,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:00:21,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 09:00:21,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:00:21,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 09:00:21,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 09:00:21,477 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 226 out of 246 [2022-07-21 09:00:21,478 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 221 transitions, 484 flow. Second operand has 3 states, 3 states have (on average 228.0) internal successors, (684), 3 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:00:21,478 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:00:21,478 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 226 of 246 [2022-07-21 09:00:21,479 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:00:21,540 INFO L129 PetriNetUnfolder]: 29/404 cut-off events. [2022-07-21 09:00:21,540 INFO L130 PetriNetUnfolder]: For 30/38 co-relation queries the response was YES. [2022-07-21 09:00:21,541 INFO L84 FinitePrefix]: Finished finitePrefix Result has 474 conditions, 404 events. 29/404 cut-off events. For 30/38 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1278 event pairs, 2 based on Foata normal form. 0/379 useless extension candidates. Maximal degree in co-relation 467. Up to 26 conditions per place. [2022-07-21 09:00:21,543 INFO L132 encePairwiseOnDemand]: 243/246 looper letters, 9 selfloop transitions, 2 changer transitions 0/224 dead transitions. [2022-07-21 09:00:21,543 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 224 transitions, 514 flow [2022-07-21 09:00:21,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 09:00:21,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-21 09:00:21,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 690 transitions. [2022-07-21 09:00:21,545 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9349593495934959 [2022-07-21 09:00:21,545 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 690 transitions. [2022-07-21 09:00:21,546 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 690 transitions. [2022-07-21 09:00:21,546 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:00:21,546 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 690 transitions. [2022-07-21 09:00:21,548 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 230.0) internal successors, (690), 3 states have internal predecessors, (690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:00:21,549 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 246.0) internal successors, (984), 4 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:00:21,550 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 246.0) internal successors, (984), 4 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:00:21,550 INFO L186 Difference]: Start difference. First operand has 215 places, 221 transitions, 484 flow. Second operand 3 states and 690 transitions. [2022-07-21 09:00:21,550 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 224 transitions, 514 flow [2022-07-21 09:00:21,553 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 224 transitions, 508 flow, removed 2 selfloop flow, removed 1 redundant places. [2022-07-21 09:00:21,555 INFO L242 Difference]: Finished difference. Result has 217 places, 221 transitions, 486 flow [2022-07-21 09:00:21,556 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=478, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=486, PETRI_PLACES=217, PETRI_TRANSITIONS=221} [2022-07-21 09:00:21,558 INFO L279 CegarLoopForPetriNet]: 217 programPoint places, 0 predicate places. [2022-07-21 09:00:21,558 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 221 transitions, 486 flow [2022-07-21 09:00:21,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 228.0) internal successors, (684), 3 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:00:21,559 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:00:21,559 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] [2022-07-21 09:00:21,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-21 09:00:21,560 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:00:21,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:00:21,561 INFO L85 PathProgramCache]: Analyzing trace with hash -1694836665, now seen corresponding path program 1 times [2022-07-21 09:00:21,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:00:21,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508324928] [2022-07-21 09:00:21,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:00:21,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:00:21,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:00:21,742 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:00:21,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:00:21,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508324928] [2022-07-21 09:00:21,743 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508324928] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:00:21,743 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:00:21,743 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-21 09:00:21,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818886366] [2022-07-21 09:00:21,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:00:21,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-21 09:00:21,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:00:21,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-21 09:00:21,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-07-21 09:00:21,747 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 246 [2022-07-21 09:00:21,749 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 221 transitions, 486 flow. Second operand has 8 states, 8 states have (on average 186.0) internal successors, (1488), 8 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:00:21,749 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:00:21,749 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 246 [2022-07-21 09:00:21,749 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:00:22,023 INFO L129 PetriNetUnfolder]: 74/629 cut-off events. [2022-07-21 09:00:22,024 INFO L130 PetriNetUnfolder]: For 33/36 co-relation queries the response was YES. [2022-07-21 09:00:22,025 INFO L84 FinitePrefix]: Finished finitePrefix Result has 916 conditions, 629 events. 74/629 cut-off events. For 33/36 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 2948 event pairs, 27 based on Foata normal form. 1/597 useless extension candidates. Maximal degree in co-relation 908. Up to 178 conditions per place. [2022-07-21 09:00:22,028 INFO L132 encePairwiseOnDemand]: 237/246 looper letters, 71 selfloop transitions, 3 changer transitions 15/264 dead transitions. [2022-07-21 09:00:22,029 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 264 transitions, 757 flow [2022-07-21 09:00:22,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-21 09:00:22,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-07-21 09:00:22,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2443 transitions. [2022-07-21 09:00:22,037 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7639149468417761 [2022-07-21 09:00:22,038 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2443 transitions. [2022-07-21 09:00:22,038 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2443 transitions. [2022-07-21 09:00:22,039 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:00:22,039 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2443 transitions. [2022-07-21 09:00:22,044 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 187.92307692307693) internal successors, (2443), 13 states have internal predecessors, (2443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:00:22,049 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 246.0) internal successors, (3444), 14 states have internal predecessors, (3444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:00:22,050 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 246.0) internal successors, (3444), 14 states have internal predecessors, (3444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:00:22,050 INFO L186 Difference]: Start difference. First operand has 217 places, 221 transitions, 486 flow. Second operand 13 states and 2443 transitions. [2022-07-21 09:00:22,051 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 264 transitions, 757 flow [2022-07-21 09:00:22,054 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 264 transitions, 753 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-07-21 09:00:22,057 INFO L242 Difference]: Finished difference. Result has 238 places, 223 transitions, 525 flow [2022-07-21 09:00:22,058 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=482, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=525, PETRI_PLACES=238, PETRI_TRANSITIONS=223} [2022-07-21 09:00:22,060 INFO L279 CegarLoopForPetriNet]: 217 programPoint places, 21 predicate places. [2022-07-21 09:00:22,060 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 223 transitions, 525 flow [2022-07-21 09:00:22,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 186.0) internal successors, (1488), 8 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:00:22,061 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:00:22,062 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] [2022-07-21 09:00:22,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-21 09:00:22,062 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:00:22,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:00:22,063 INFO L85 PathProgramCache]: Analyzing trace with hash 1194393457, now seen corresponding path program 2 times [2022-07-21 09:00:22,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:00:22,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937285809] [2022-07-21 09:00:22,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:00:22,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:00:22,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:00:22,219 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:00:22,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:00:22,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937285809] [2022-07-21 09:00:22,220 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937285809] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:00:22,222 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:00:22,222 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-21 09:00:22,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901944848] [2022-07-21 09:00:22,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:00:22,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-21 09:00:22,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:00:22,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-21 09:00:22,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-07-21 09:00:22,232 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 246 [2022-07-21 09:00:22,233 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 223 transitions, 525 flow. Second operand has 8 states, 8 states have (on average 186.0) internal successors, (1488), 8 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:00:22,234 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:00:22,234 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 246 [2022-07-21 09:00:22,234 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:00:22,475 INFO L129 PetriNetUnfolder]: 92/755 cut-off events. [2022-07-21 09:00:22,476 INFO L130 PetriNetUnfolder]: For 255/258 co-relation queries the response was YES. [2022-07-21 09:00:22,478 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1345 conditions, 755 events. 92/755 cut-off events. For 255/258 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 4041 event pairs, 39 based on Foata normal form. 1/722 useless extension candidates. Maximal degree in co-relation 1326. Up to 216 conditions per place. [2022-07-21 09:00:22,480 INFO L132 encePairwiseOnDemand]: 237/246 looper letters, 80 selfloop transitions, 3 changer transitions 16/274 dead transitions. [2022-07-21 09:00:22,480 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 274 transitions, 943 flow [2022-07-21 09:00:22,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-21 09:00:22,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-07-21 09:00:22,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2445 transitions. [2022-07-21 09:00:22,486 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7645403377110694 [2022-07-21 09:00:22,486 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2445 transitions. [2022-07-21 09:00:22,486 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2445 transitions. [2022-07-21 09:00:22,487 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:00:22,487 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2445 transitions. [2022-07-21 09:00:22,492 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 188.07692307692307) internal successors, (2445), 13 states have internal predecessors, (2445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:00:22,496 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 246.0) internal successors, (3444), 14 states have internal predecessors, (3444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:00:22,498 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 246.0) internal successors, (3444), 14 states have internal predecessors, (3444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:00:22,498 INFO L186 Difference]: Start difference. First operand has 238 places, 223 transitions, 525 flow. Second operand 13 states and 2445 transitions. [2022-07-21 09:00:22,498 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 274 transitions, 943 flow [2022-07-21 09:00:22,502 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 274 transitions, 901 flow, removed 19 selfloop flow, removed 7 redundant places. [2022-07-21 09:00:22,506 INFO L242 Difference]: Finished difference. Result has 246 places, 225 transitions, 559 flow [2022-07-21 09:00:22,506 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=512, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=559, PETRI_PLACES=246, PETRI_TRANSITIONS=225} [2022-07-21 09:00:22,507 INFO L279 CegarLoopForPetriNet]: 217 programPoint places, 29 predicate places. [2022-07-21 09:00:22,507 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 225 transitions, 559 flow [2022-07-21 09:00:22,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 186.0) internal successors, (1488), 8 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:00:22,508 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:00:22,508 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] [2022-07-21 09:00:22,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-21 09:00:22,509 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:00:22,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:00:22,509 INFO L85 PathProgramCache]: Analyzing trace with hash -877867671, now seen corresponding path program 3 times [2022-07-21 09:00:22,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:00:22,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772020960] [2022-07-21 09:00:22,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:00:22,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:00:22,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:00:22,626 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:00:22,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:00:22,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772020960] [2022-07-21 09:00:22,626 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772020960] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:00:22,627 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:00:22,627 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-21 09:00:22,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23982811] [2022-07-21 09:00:22,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:00:22,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-21 09:00:22,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:00:22,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-21 09:00:22,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-07-21 09:00:22,630 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 246 [2022-07-21 09:00:22,632 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 225 transitions, 559 flow. Second operand has 8 states, 8 states have (on average 186.0) internal successors, (1488), 8 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:00:22,632 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:00:22,632 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 246 [2022-07-21 09:00:22,632 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:00:22,906 INFO L129 PetriNetUnfolder]: 91/757 cut-off events. [2022-07-21 09:00:22,906 INFO L130 PetriNetUnfolder]: For 509/513 co-relation queries the response was YES. [2022-07-21 09:00:22,919 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1475 conditions, 757 events. 91/757 cut-off events. For 509/513 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 4037 event pairs, 49 based on Foata normal form. 1/719 useless extension candidates. Maximal degree in co-relation 1451. Up to 264 conditions per place. [2022-07-21 09:00:22,921 INFO L132 encePairwiseOnDemand]: 237/246 looper letters, 55 selfloop transitions, 8 changer transitions 12/250 dead transitions. [2022-07-21 09:00:22,922 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 250 transitions, 880 flow [2022-07-21 09:00:22,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-21 09:00:22,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-07-21 09:00:22,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2244 transitions. [2022-07-21 09:00:22,927 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7601626016260162 [2022-07-21 09:00:22,927 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2244 transitions. [2022-07-21 09:00:22,927 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2244 transitions. [2022-07-21 09:00:22,929 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:00:22,929 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2244 transitions. [2022-07-21 09:00:22,933 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 187.0) internal successors, (2244), 12 states have internal predecessors, (2244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:00:22,939 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 246.0) internal successors, (3198), 13 states have internal predecessors, (3198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:00:22,940 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 246.0) internal successors, (3198), 13 states have internal predecessors, (3198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:00:22,940 INFO L186 Difference]: Start difference. First operand has 246 places, 225 transitions, 559 flow. Second operand 12 states and 2244 transitions. [2022-07-21 09:00:22,940 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 250 transitions, 880 flow [2022-07-21 09:00:22,945 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 250 transitions, 852 flow, removed 13 selfloop flow, removed 7 redundant places. [2022-07-21 09:00:22,950 INFO L242 Difference]: Finished difference. Result has 249 places, 232 transitions, 649 flow [2022-07-21 09:00:22,950 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=546, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=649, PETRI_PLACES=249, PETRI_TRANSITIONS=232} [2022-07-21 09:00:22,952 INFO L279 CegarLoopForPetriNet]: 217 programPoint places, 32 predicate places. [2022-07-21 09:00:22,952 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 232 transitions, 649 flow [2022-07-21 09:00:22,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 186.0) internal successors, (1488), 8 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:00:22,953 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:00:22,953 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] [2022-07-21 09:00:22,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-21 09:00:22,954 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:00:22,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:00:22,955 INFO L85 PathProgramCache]: Analyzing trace with hash -1920098823, now seen corresponding path program 4 times [2022-07-21 09:00:22,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:00:22,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003122594] [2022-07-21 09:00:22,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:00:22,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:00:22,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:00:23,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:00:23,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:00:23,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003122594] [2022-07-21 09:00:23,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003122594] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:00:23,093 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:00:23,093 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-21 09:00:23,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408440180] [2022-07-21 09:00:23,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:00:23,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-21 09:00:23,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:00:23,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-21 09:00:23,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-07-21 09:00:23,097 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 246 [2022-07-21 09:00:23,099 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 232 transitions, 649 flow. Second operand has 8 states, 8 states have (on average 186.0) internal successors, (1488), 8 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:00:23,099 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:00:23,100 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 246 [2022-07-21 09:00:23,100 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:00:23,362 INFO L129 PetriNetUnfolder]: 89/764 cut-off events. [2022-07-21 09:00:23,363 INFO L130 PetriNetUnfolder]: For 646/656 co-relation queries the response was YES. [2022-07-21 09:00:23,366 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1533 conditions, 764 events. 89/764 cut-off events. For 646/656 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 4171 event pairs, 49 based on Foata normal form. 2/727 useless extension candidates. Maximal degree in co-relation 1508. Up to 271 conditions per place. [2022-07-21 09:00:23,369 INFO L132 encePairwiseOnDemand]: 237/246 looper letters, 55 selfloop transitions, 12 changer transitions 11/253 dead transitions. [2022-07-21 09:00:23,369 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 253 transitions, 968 flow [2022-07-21 09:00:23,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-21 09:00:23,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-07-21 09:00:23,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2062 transitions. [2022-07-21 09:00:23,374 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.762010347376201 [2022-07-21 09:00:23,374 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2062 transitions. [2022-07-21 09:00:23,375 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2062 transitions. [2022-07-21 09:00:23,376 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:00:23,376 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2062 transitions. [2022-07-21 09:00:23,380 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 187.45454545454547) internal successors, (2062), 11 states have internal predecessors, (2062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:00:23,385 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 246.0) internal successors, (2952), 12 states have internal predecessors, (2952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:00:23,386 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 246.0) internal successors, (2952), 12 states have internal predecessors, (2952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:00:23,386 INFO L186 Difference]: Start difference. First operand has 249 places, 232 transitions, 649 flow. Second operand 11 states and 2062 transitions. [2022-07-21 09:00:23,386 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 253 transitions, 968 flow [2022-07-21 09:00:23,391 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 253 transitions, 946 flow, removed 11 selfloop flow, removed 3 redundant places. [2022-07-21 09:00:23,394 INFO L242 Difference]: Finished difference. Result has 258 places, 237 transitions, 740 flow [2022-07-21 09:00:23,395 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=631, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=740, PETRI_PLACES=258, PETRI_TRANSITIONS=237} [2022-07-21 09:00:23,396 INFO L279 CegarLoopForPetriNet]: 217 programPoint places, 41 predicate places. [2022-07-21 09:00:23,396 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 237 transitions, 740 flow [2022-07-21 09:00:23,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 186.0) internal successors, (1488), 8 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:00:23,397 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:00:23,397 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] [2022-07-21 09:00:23,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-21 09:00:23,398 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:00:23,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:00:23,399 INFO L85 PathProgramCache]: Analyzing trace with hash 1824923961, now seen corresponding path program 1 times [2022-07-21 09:00:23,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:00:23,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082946904] [2022-07-21 09:00:23,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:00:23,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:00:23,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:00:23,445 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:00:23,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:00:23,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082946904] [2022-07-21 09:00:23,450 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082946904] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:00:23,450 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:00:23,450 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 09:00:23,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737913042] [2022-07-21 09:00:23,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:00:23,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 09:00:23,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:00:23,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 09:00:23,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-21 09:00:23,455 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 218 out of 246 [2022-07-21 09:00:23,468 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 237 transitions, 740 flow. Second operand has 4 states, 4 states have (on average 221.0) internal successors, (884), 4 states have internal predecessors, (884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:00:23,468 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:00:23,468 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 218 of 246 [2022-07-21 09:00:23,469 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:00:23,579 INFO L129 PetriNetUnfolder]: 53/687 cut-off events. [2022-07-21 09:00:23,579 INFO L130 PetriNetUnfolder]: For 642/645 co-relation queries the response was YES. [2022-07-21 09:00:23,582 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1211 conditions, 687 events. 53/687 cut-off events. For 642/645 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 3309 event pairs, 17 based on Foata normal form. 0/645 useless extension candidates. Maximal degree in co-relation 1180. Up to 31 conditions per place. [2022-07-21 09:00:23,585 INFO L132 encePairwiseOnDemand]: 240/246 looper letters, 26 selfloop transitions, 4 changer transitions 0/247 dead transitions. [2022-07-21 09:00:23,585 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 247 transitions, 830 flow [2022-07-21 09:00:23,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 09:00:23,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-07-21 09:00:23,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 902 transitions. [2022-07-21 09:00:23,589 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9166666666666666 [2022-07-21 09:00:23,589 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 902 transitions. [2022-07-21 09:00:23,589 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 902 transitions. [2022-07-21 09:00:23,590 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:00:23,590 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 902 transitions. [2022-07-21 09:00:23,592 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 225.5) internal successors, (902), 4 states have internal predecessors, (902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:00:23,593 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 246.0) internal successors, (1230), 5 states have internal predecessors, (1230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:00:23,594 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 246.0) internal successors, (1230), 5 states have internal predecessors, (1230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:00:23,594 INFO L186 Difference]: Start difference. First operand has 258 places, 237 transitions, 740 flow. Second operand 4 states and 902 transitions. [2022-07-21 09:00:23,594 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 247 transitions, 830 flow [2022-07-21 09:00:23,600 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 247 transitions, 793 flow, removed 14 selfloop flow, removed 5 redundant places. [2022-07-21 09:00:23,604 INFO L242 Difference]: Finished difference. Result has 253 places, 239 transitions, 729 flow [2022-07-21 09:00:23,605 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=703, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=729, PETRI_PLACES=253, PETRI_TRANSITIONS=239} [2022-07-21 09:00:23,605 INFO L279 CegarLoopForPetriNet]: 217 programPoint places, 36 predicate places. [2022-07-21 09:00:23,606 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 239 transitions, 729 flow [2022-07-21 09:00:23,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 221.0) internal successors, (884), 4 states have internal predecessors, (884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:00:23,606 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:00:23,607 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] [2022-07-21 09:00:23,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-21 09:00:23,608 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:00:23,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:00:23,608 INFO L85 PathProgramCache]: Analyzing trace with hash 1129283707, now seen corresponding path program 1 times [2022-07-21 09:00:23,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:00:23,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080706829] [2022-07-21 09:00:23,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:00:23,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:00:23,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:00:23,648 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:00:23,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:00:23,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080706829] [2022-07-21 09:00:23,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080706829] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:00:23,649 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:00:23,649 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 09:00:23,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556163379] [2022-07-21 09:00:23,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:00:23,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 09:00:23,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:00:23,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 09:00:23,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 09:00:23,652 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 218 out of 246 [2022-07-21 09:00:23,653 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 239 transitions, 729 flow. Second operand has 3 states, 3 states have (on average 222.0) internal successors, (666), 3 states have internal predecessors, (666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:00:23,653 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:00:23,653 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 218 of 246 [2022-07-21 09:00:23,653 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:00:23,743 INFO L129 PetriNetUnfolder]: 48/646 cut-off events. [2022-07-21 09:00:23,744 INFO L130 PetriNetUnfolder]: For 500/514 co-relation queries the response was YES. [2022-07-21 09:00:23,746 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1078 conditions, 646 events. 48/646 cut-off events. For 500/514 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 2967 event pairs, 13 based on Foata normal form. 2/620 useless extension candidates. Maximal degree in co-relation 1049. Up to 53 conditions per place. [2022-07-21 09:00:23,748 INFO L132 encePairwiseOnDemand]: 244/246 looper letters, 26 selfloop transitions, 1 changer transitions 0/244 dead transitions. [2022-07-21 09:00:23,748 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 244 transitions, 800 flow [2022-07-21 09:00:23,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 09:00:23,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-21 09:00:23,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 676 transitions. [2022-07-21 09:00:23,751 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9159891598915989 [2022-07-21 09:00:23,751 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 676 transitions. [2022-07-21 09:00:23,751 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 676 transitions. [2022-07-21 09:00:23,751 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:00:23,752 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 676 transitions. [2022-07-21 09:00:23,753 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 225.33333333333334) internal successors, (676), 3 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:00:23,754 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 246.0) internal successors, (984), 4 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:00:23,755 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 246.0) internal successors, (984), 4 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:00:23,755 INFO L186 Difference]: Start difference. First operand has 253 places, 239 transitions, 729 flow. Second operand 3 states and 676 transitions. [2022-07-21 09:00:23,755 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 244 transitions, 800 flow [2022-07-21 09:00:23,759 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 244 transitions, 790 flow, removed 4 selfloop flow, removed 3 redundant places. [2022-07-21 09:00:23,762 INFO L242 Difference]: Finished difference. Result has 253 places, 239 transitions, 724 flow [2022-07-21 09:00:23,763 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=719, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=724, PETRI_PLACES=253, PETRI_TRANSITIONS=239} [2022-07-21 09:00:23,763 INFO L279 CegarLoopForPetriNet]: 217 programPoint places, 36 predicate places. [2022-07-21 09:00:23,764 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 239 transitions, 724 flow [2022-07-21 09:00:23,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 222.0) internal successors, (666), 3 states have internal predecessors, (666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:00:23,764 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:00:23,764 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] [2022-07-21 09:00:23,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-21 09:00:23,765 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:00:23,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:00:23,765 INFO L85 PathProgramCache]: Analyzing trace with hash 851981685, now seen corresponding path program 1 times [2022-07-21 09:00:23,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:00:23,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639268813] [2022-07-21 09:00:23,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:00:23,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:00:23,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:00:23,894 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:00:23,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:00:23,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639268813] [2022-07-21 09:00:23,895 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639268813] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:00:23,895 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:00:23,895 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-21 09:00:23,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647686051] [2022-07-21 09:00:23,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:00:23,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-21 09:00:23,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:00:23,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-21 09:00:23,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-07-21 09:00:23,899 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 246 [2022-07-21 09:00:23,900 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 239 transitions, 724 flow. Second operand has 8 states, 8 states have (on average 186.0) internal successors, (1488), 8 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:00:23,900 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:00:23,900 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 246 [2022-07-21 09:00:23,900 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:00:24,184 INFO L129 PetriNetUnfolder]: 78/727 cut-off events. [2022-07-21 09:00:24,184 INFO L130 PetriNetUnfolder]: For 662/698 co-relation queries the response was YES. [2022-07-21 09:00:24,187 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1436 conditions, 727 events. 78/727 cut-off events. For 662/698 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 3836 event pairs, 21 based on Foata normal form. 1/701 useless extension candidates. Maximal degree in co-relation 1408. Up to 195 conditions per place. [2022-07-21 09:00:24,189 INFO L132 encePairwiseOnDemand]: 237/246 looper letters, 91 selfloop transitions, 3 changer transitions 19/290 dead transitions. [2022-07-21 09:00:24,189 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 290 transitions, 1219 flow [2022-07-21 09:00:24,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-21 09:00:24,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-07-21 09:00:24,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2447 transitions. [2022-07-21 09:00:24,195 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7651657285803627 [2022-07-21 09:00:24,195 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2447 transitions. [2022-07-21 09:00:24,196 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2447 transitions. [2022-07-21 09:00:24,197 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:00:24,197 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2447 transitions. [2022-07-21 09:00:24,201 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 188.23076923076923) internal successors, (2447), 13 states have internal predecessors, (2447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:00:24,206 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 246.0) internal successors, (3444), 14 states have internal predecessors, (3444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:00:24,207 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 246.0) internal successors, (3444), 14 states have internal predecessors, (3444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:00:24,207 INFO L186 Difference]: Start difference. First operand has 253 places, 239 transitions, 724 flow. Second operand 13 states and 2447 transitions. [2022-07-21 09:00:24,207 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 290 transitions, 1219 flow [2022-07-21 09:00:24,212 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 290 transitions, 1218 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-21 09:00:24,216 INFO L242 Difference]: Finished difference. Result has 273 places, 239 transitions, 750 flow [2022-07-21 09:00:24,216 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=723, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=750, PETRI_PLACES=273, PETRI_TRANSITIONS=239} [2022-07-21 09:00:24,217 INFO L279 CegarLoopForPetriNet]: 217 programPoint places, 56 predicate places. [2022-07-21 09:00:24,217 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 239 transitions, 750 flow [2022-07-21 09:00:24,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 186.0) internal successors, (1488), 8 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:00:24,218 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:00:24,218 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] [2022-07-21 09:00:24,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-21 09:00:24,219 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:00:24,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:00:24,219 INFO L85 PathProgramCache]: Analyzing trace with hash -2082922393, now seen corresponding path program 1 times [2022-07-21 09:00:24,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:00:24,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585302952] [2022-07-21 09:00:24,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:00:24,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:00:24,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:00:24,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:00:24,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:00:24,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585302952] [2022-07-21 09:00:24,767 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585302952] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:00:24,767 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:00:24,767 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-07-21 09:00:24,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653061947] [2022-07-21 09:00:24,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:00:24,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-21 09:00:24,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:00:24,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-21 09:00:24,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2022-07-21 09:00:24,772 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 246 [2022-07-21 09:00:24,775 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 239 transitions, 750 flow. Second operand has 21 states, 21 states have (on average 161.57142857142858) internal successors, (3393), 21 states have internal predecessors, (3393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:00:24,776 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:00:24,776 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 246 [2022-07-21 09:00:24,776 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:00:26,520 INFO L129 PetriNetUnfolder]: 285/2460 cut-off events. [2022-07-21 09:00:26,520 INFO L130 PetriNetUnfolder]: For 1983/2042 co-relation queries the response was YES. [2022-07-21 09:00:26,531 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4562 conditions, 2460 events. 285/2460 cut-off events. For 1983/2042 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 20893 event pairs, 74 based on Foata normal form. 11/2306 useless extension candidates. Maximal degree in co-relation 4525. Up to 216 conditions per place. [2022-07-21 09:00:26,538 INFO L132 encePairwiseOnDemand]: 215/246 looper letters, 168 selfloop transitions, 51 changer transitions 19/405 dead transitions. [2022-07-21 09:00:26,539 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 405 transitions, 1853 flow [2022-07-21 09:00:26,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-07-21 09:00:26,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2022-07-21 09:00:26,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 4667 transitions. [2022-07-21 09:00:26,548 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6775551684088269 [2022-07-21 09:00:26,549 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 4667 transitions. [2022-07-21 09:00:26,549 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 4667 transitions. [2022-07-21 09:00:26,551 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:00:26,551 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 4667 transitions. [2022-07-21 09:00:26,560 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 166.67857142857142) internal successors, (4667), 28 states have internal predecessors, (4667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:00:26,571 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 246.0) internal successors, (7134), 29 states have internal predecessors, (7134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:00:26,572 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 246.0) internal successors, (7134), 29 states have internal predecessors, (7134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:00:26,573 INFO L186 Difference]: Start difference. First operand has 273 places, 239 transitions, 750 flow. Second operand 28 states and 4667 transitions. [2022-07-21 09:00:26,573 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 405 transitions, 1853 flow [2022-07-21 09:00:26,584 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 405 transitions, 1707 flow, removed 35 selfloop flow, removed 11 redundant places. [2022-07-21 09:00:26,589 INFO L242 Difference]: Finished difference. Result has 294 places, 280 transitions, 1142 flow [2022-07-21 09:00:26,590 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=713, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=1142, PETRI_PLACES=294, PETRI_TRANSITIONS=280} [2022-07-21 09:00:26,590 INFO L279 CegarLoopForPetriNet]: 217 programPoint places, 77 predicate places. [2022-07-21 09:00:26,590 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 280 transitions, 1142 flow [2022-07-21 09:00:26,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 161.57142857142858) internal successors, (3393), 21 states have internal predecessors, (3393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:00:26,592 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:00:26,592 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] [2022-07-21 09:00:26,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-21 09:00:26,592 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:00:26,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:00:26,593 INFO L85 PathProgramCache]: Analyzing trace with hash -939159561, now seen corresponding path program 2 times [2022-07-21 09:00:26,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:00:26,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139722132] [2022-07-21 09:00:26,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:00:26,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:00:26,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:00:26,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:00:26,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:00:26,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139722132] [2022-07-21 09:00:26,698 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139722132] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:00:26,698 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:00:26,698 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-21 09:00:26,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989309941] [2022-07-21 09:00:26,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:00:26,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-21 09:00:26,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:00:26,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-21 09:00:26,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-07-21 09:00:26,701 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 246 [2022-07-21 09:00:26,728 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 280 transitions, 1142 flow. Second operand has 8 states, 8 states have (on average 186.0) internal successors, (1488), 8 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:00:26,728 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:00:26,728 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 246 [2022-07-21 09:00:26,728 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:00:27,269 INFO L129 PetriNetUnfolder]: 223/2133 cut-off events. [2022-07-21 09:00:27,270 INFO L130 PetriNetUnfolder]: For 2997/3135 co-relation queries the response was YES. [2022-07-21 09:00:27,282 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4796 conditions, 2133 events. 223/2133 cut-off events. For 2997/3135 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 17640 event pairs, 75 based on Foata normal form. 3/2065 useless extension candidates. Maximal degree in co-relation 4754. Up to 688 conditions per place. [2022-07-21 09:00:27,290 INFO L132 encePairwiseOnDemand]: 237/246 looper letters, 113 selfloop transitions, 8 changer transitions 20/326 dead transitions. [2022-07-21 09:00:27,290 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 326 transitions, 1629 flow [2022-07-21 09:00:27,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-21 09:00:27,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-07-21 09:00:27,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2446 transitions. [2022-07-21 09:00:27,294 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7648530331457161 [2022-07-21 09:00:27,294 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2446 transitions. [2022-07-21 09:00:27,294 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2446 transitions. [2022-07-21 09:00:27,295 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:00:27,295 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2446 transitions. [2022-07-21 09:00:27,298 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 188.15384615384616) internal successors, (2446), 13 states have internal predecessors, (2446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:00:27,304 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 246.0) internal successors, (3444), 14 states have internal predecessors, (3444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:00:27,304 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 246.0) internal successors, (3444), 14 states have internal predecessors, (3444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:00:27,305 INFO L186 Difference]: Start difference. First operand has 294 places, 280 transitions, 1142 flow. Second operand 13 states and 2446 transitions. [2022-07-21 09:00:27,305 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 326 transitions, 1629 flow [2022-07-21 09:00:27,322 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 326 transitions, 1541 flow, removed 34 selfloop flow, removed 12 redundant places. [2022-07-21 09:00:27,326 INFO L242 Difference]: Finished difference. Result has 301 places, 280 transitions, 1100 flow [2022-07-21 09:00:27,327 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=1058, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=280, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1100, PETRI_PLACES=301, PETRI_TRANSITIONS=280} [2022-07-21 09:00:27,328 INFO L279 CegarLoopForPetriNet]: 217 programPoint places, 84 predicate places. [2022-07-21 09:00:27,328 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 280 transitions, 1100 flow [2022-07-21 09:00:27,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 186.0) internal successors, (1488), 8 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:00:27,329 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:00:27,329 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] [2022-07-21 09:00:27,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-21 09:00:27,330 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:00:27,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:00:27,331 INFO L85 PathProgramCache]: Analyzing trace with hash 212833077, now seen corresponding path program 3 times [2022-07-21 09:00:27,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:00:27,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777503788] [2022-07-21 09:00:27,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:00:27,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:00:27,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:00:27,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:00:27,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:00:27,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777503788] [2022-07-21 09:00:27,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777503788] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:00:27,467 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:00:27,468 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-21 09:00:27,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920930138] [2022-07-21 09:00:27,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:00:27,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-21 09:00:27,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:00:27,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-21 09:00:27,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-07-21 09:00:27,471 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 246 [2022-07-21 09:00:27,472 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 280 transitions, 1100 flow. Second operand has 8 states, 8 states have (on average 186.0) internal successors, (1488), 8 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:00:27,472 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:00:27,472 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 246 [2022-07-21 09:00:27,472 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:00:27,967 INFO L129 PetriNetUnfolder]: 226/2159 cut-off events. [2022-07-21 09:00:27,968 INFO L130 PetriNetUnfolder]: For 3614/3752 co-relation queries the response was YES. [2022-07-21 09:00:27,982 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5131 conditions, 2159 events. 226/2159 cut-off events. For 3614/3752 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 17975 event pairs, 67 based on Foata normal form. 3/2086 useless extension candidates. Maximal degree in co-relation 5083. Up to 742 conditions per place. [2022-07-21 09:00:27,990 INFO L132 encePairwiseOnDemand]: 237/246 looper letters, 113 selfloop transitions, 10 changer transitions 19/327 dead transitions. [2022-07-21 09:00:27,990 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 327 transitions, 1801 flow [2022-07-21 09:00:27,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-21 09:00:27,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-07-21 09:00:27,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2068 transitions. [2022-07-21 09:00:27,993 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7642276422764228 [2022-07-21 09:00:27,994 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2068 transitions. [2022-07-21 09:00:27,994 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2068 transitions. [2022-07-21 09:00:27,994 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:00:27,995 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2068 transitions. [2022-07-21 09:00:27,997 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 188.0) internal successors, (2068), 11 states have internal predecessors, (2068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:00:28,025 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 246.0) internal successors, (2952), 12 states have internal predecessors, (2952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:00:28,026 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 246.0) internal successors, (2952), 12 states have internal predecessors, (2952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:00:28,026 INFO L186 Difference]: Start difference. First operand has 301 places, 280 transitions, 1100 flow. Second operand 11 states and 2068 transitions. [2022-07-21 09:00:28,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 327 transitions, 1801 flow [2022-07-21 09:00:28,045 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 327 transitions, 1611 flow, removed 46 selfloop flow, removed 12 redundant places. [2022-07-21 09:00:28,049 INFO L242 Difference]: Finished difference. Result has 299 places, 288 transitions, 1157 flow [2022-07-21 09:00:28,050 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=1025, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=280, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=273, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1157, PETRI_PLACES=299, PETRI_TRANSITIONS=288} [2022-07-21 09:00:28,050 INFO L279 CegarLoopForPetriNet]: 217 programPoint places, 82 predicate places. [2022-07-21 09:00:28,051 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 288 transitions, 1157 flow [2022-07-21 09:00:28,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 186.0) internal successors, (1488), 8 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:00:28,051 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:00:28,052 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] [2022-07-21 09:00:28,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-21 09:00:28,052 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:00:28,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:00:28,053 INFO L85 PathProgramCache]: Analyzing trace with hash -1634429333, now seen corresponding path program 4 times [2022-07-21 09:00:28,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:00:28,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825182022] [2022-07-21 09:00:28,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:00:28,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:00:28,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:00:28,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:00:28,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:00:28,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825182022] [2022-07-21 09:00:28,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825182022] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:00:28,147 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:00:28,147 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-21 09:00:28,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385615675] [2022-07-21 09:00:28,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:00:28,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-21 09:00:28,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:00:28,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-21 09:00:28,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-07-21 09:00:28,150 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 246 [2022-07-21 09:00:28,151 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 288 transitions, 1157 flow. Second operand has 8 states, 8 states have (on average 186.0) internal successors, (1488), 8 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:00:28,152 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:00:28,152 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 246 [2022-07-21 09:00:28,152 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:00:28,667 INFO L129 PetriNetUnfolder]: 220/2150 cut-off events. [2022-07-21 09:00:28,667 INFO L130 PetriNetUnfolder]: For 3076/3229 co-relation queries the response was YES. [2022-07-21 09:00:28,682 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4996 conditions, 2150 events. 220/2150 cut-off events. For 3076/3229 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 17892 event pairs, 85 based on Foata normal form. 6/2078 useless extension candidates. Maximal degree in co-relation 4949. Up to 784 conditions per place. [2022-07-21 09:00:28,690 INFO L132 encePairwiseOnDemand]: 237/246 looper letters, 103 selfloop transitions, 10 changer transitions 25/323 dead transitions. [2022-07-21 09:00:28,691 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 323 transitions, 1700 flow [2022-07-21 09:00:28,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-21 09:00:28,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-07-21 09:00:28,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2065 transitions. [2022-07-21 09:00:28,694 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7631189948263118 [2022-07-21 09:00:28,694 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2065 transitions. [2022-07-21 09:00:28,695 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2065 transitions. [2022-07-21 09:00:28,695 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:00:28,695 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2065 transitions. [2022-07-21 09:00:28,699 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 187.72727272727272) internal successors, (2065), 11 states have internal predecessors, (2065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:00:28,702 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 246.0) internal successors, (2952), 12 states have internal predecessors, (2952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:00:28,703 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 246.0) internal successors, (2952), 12 states have internal predecessors, (2952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:00:28,703 INFO L186 Difference]: Start difference. First operand has 299 places, 288 transitions, 1157 flow. Second operand 11 states and 2065 transitions. [2022-07-21 09:00:28,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 323 transitions, 1700 flow [2022-07-21 09:00:28,723 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 323 transitions, 1635 flow, removed 27 selfloop flow, removed 6 redundant places. [2022-07-21 09:00:28,727 INFO L242 Difference]: Finished difference. Result has 306 places, 294 transitions, 1236 flow [2022-07-21 09:00:28,727 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=1112, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=288, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=281, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1236, PETRI_PLACES=306, PETRI_TRANSITIONS=294} [2022-07-21 09:00:28,728 INFO L279 CegarLoopForPetriNet]: 217 programPoint places, 89 predicate places. [2022-07-21 09:00:28,728 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 294 transitions, 1236 flow [2022-07-21 09:00:28,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 186.0) internal successors, (1488), 8 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:00:28,729 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:00:28,729 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] [2022-07-21 09:00:28,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-21 09:00:28,730 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:00:28,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:00:28,730 INFO L85 PathProgramCache]: Analyzing trace with hash -357227217, now seen corresponding path program 5 times [2022-07-21 09:00:28,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:00:28,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977704916] [2022-07-21 09:00:28,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:00:28,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:00:28,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:00:28,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:00:28,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:00:28,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977704916] [2022-07-21 09:00:28,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977704916] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:00:28,832 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:00:28,833 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-21 09:00:28,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606902597] [2022-07-21 09:00:28,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:00:28,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-21 09:00:28,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:00:28,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-21 09:00:28,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-07-21 09:00:28,835 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 246 [2022-07-21 09:00:28,837 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 294 transitions, 1236 flow. Second operand has 8 states, 8 states have (on average 186.0) internal successors, (1488), 8 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:00:28,837 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:00:28,837 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 246 [2022-07-21 09:00:28,837 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:00:29,317 INFO L129 PetriNetUnfolder]: 208/2094 cut-off events. [2022-07-21 09:00:29,317 INFO L130 PetriNetUnfolder]: For 3213/3375 co-relation queries the response was YES. [2022-07-21 09:00:29,335 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4818 conditions, 2094 events. 208/2094 cut-off events. For 3213/3375 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 17269 event pairs, 81 based on Foata normal form. 12/2032 useless extension candidates. Maximal degree in co-relation 4768. Up to 757 conditions per place. [2022-07-21 09:00:29,345 INFO L132 encePairwiseOnDemand]: 237/246 looper letters, 99 selfloop transitions, 4 changer transitions 26/314 dead transitions. [2022-07-21 09:00:29,346 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 314 transitions, 1607 flow [2022-07-21 09:00:29,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-21 09:00:29,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-07-21 09:00:29,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2244 transitions. [2022-07-21 09:00:29,350 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7601626016260162 [2022-07-21 09:00:29,350 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2244 transitions. [2022-07-21 09:00:29,350 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2244 transitions. [2022-07-21 09:00:29,351 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:00:29,351 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2244 transitions. [2022-07-21 09:00:29,355 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 187.0) internal successors, (2244), 12 states have internal predecessors, (2244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:00:29,360 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 246.0) internal successors, (3198), 13 states have internal predecessors, (3198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:00:29,361 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 246.0) internal successors, (3198), 13 states have internal predecessors, (3198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:00:29,361 INFO L186 Difference]: Start difference. First operand has 306 places, 294 transitions, 1236 flow. Second operand 12 states and 2244 transitions. [2022-07-21 09:00:29,361 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 314 transitions, 1607 flow [2022-07-21 09:00:29,384 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 314 transitions, 1542 flow, removed 28 selfloop flow, removed 6 redundant places. [2022-07-21 09:00:29,389 INFO L242 Difference]: Finished difference. Result has 311 places, 285 transitions, 1117 flow [2022-07-21 09:00:29,390 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=1177, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=294, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=290, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1117, PETRI_PLACES=311, PETRI_TRANSITIONS=285} [2022-07-21 09:00:29,391 INFO L279 CegarLoopForPetriNet]: 217 programPoint places, 94 predicate places. [2022-07-21 09:00:29,391 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 285 transitions, 1117 flow [2022-07-21 09:00:29,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 186.0) internal successors, (1488), 8 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:00:29,392 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:00:29,392 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] [2022-07-21 09:00:29,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-07-21 09:00:29,392 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:00:29,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:00:29,393 INFO L85 PathProgramCache]: Analyzing trace with hash -971924477, now seen corresponding path program 6 times [2022-07-21 09:00:29,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:00:29,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872300493] [2022-07-21 09:00:29,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:00:29,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:00:29,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:00:29,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:00:29,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:00:29,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872300493] [2022-07-21 09:00:29,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872300493] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:00:29,494 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:00:29,495 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-21 09:00:29,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082110243] [2022-07-21 09:00:29,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:00:29,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-21 09:00:29,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:00:29,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-21 09:00:29,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-07-21 09:00:29,497 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 246 [2022-07-21 09:00:29,498 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 285 transitions, 1117 flow. Second operand has 8 states, 8 states have (on average 186.0) internal successors, (1488), 8 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:00:29,499 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:00:29,499 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 246 [2022-07-21 09:00:29,499 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:00:29,947 INFO L129 PetriNetUnfolder]: 187/1888 cut-off events. [2022-07-21 09:00:29,948 INFO L130 PetriNetUnfolder]: For 2635/2773 co-relation queries the response was YES. [2022-07-21 09:00:29,960 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4243 conditions, 1888 events. 187/1888 cut-off events. For 2635/2773 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 14879 event pairs, 60 based on Foata normal form. 3/1820 useless extension candidates. Maximal degree in co-relation 4193. Up to 640 conditions per place. [2022-07-21 09:00:29,966 INFO L132 encePairwiseOnDemand]: 237/246 looper letters, 94 selfloop transitions, 2 changer transitions 27/307 dead transitions. [2022-07-21 09:00:29,966 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 307 transitions, 1479 flow [2022-07-21 09:00:29,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-21 09:00:29,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-07-21 09:00:29,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2244 transitions. [2022-07-21 09:00:29,972 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7601626016260162 [2022-07-21 09:00:29,972 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2244 transitions. [2022-07-21 09:00:29,972 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2244 transitions. [2022-07-21 09:00:29,974 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:00:29,974 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2244 transitions. [2022-07-21 09:00:29,981 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 187.0) internal successors, (2244), 12 states have internal predecessors, (2244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:00:29,988 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 246.0) internal successors, (3198), 13 states have internal predecessors, (3198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:00:29,989 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 246.0) internal successors, (3198), 13 states have internal predecessors, (3198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:00:29,989 INFO L186 Difference]: Start difference. First operand has 311 places, 285 transitions, 1117 flow. Second operand 12 states and 2244 transitions. [2022-07-21 09:00:29,989 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 307 transitions, 1479 flow [2022-07-21 09:00:30,005 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 307 transitions, 1421 flow, removed 18 selfloop flow, removed 12 redundant places. [2022-07-21 09:00:30,009 INFO L242 Difference]: Finished difference. Result has 302 places, 271 transitions, 982 flow [2022-07-21 09:00:30,010 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=1069, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=285, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=283, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=982, PETRI_PLACES=302, PETRI_TRANSITIONS=271} [2022-07-21 09:00:30,010 INFO L279 CegarLoopForPetriNet]: 217 programPoint places, 85 predicate places. [2022-07-21 09:00:30,010 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 271 transitions, 982 flow [2022-07-21 09:00:30,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 186.0) internal successors, (1488), 8 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:00:30,011 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:00:30,011 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] [2022-07-21 09:00:30,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-07-21 09:00:30,011 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:00:30,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:00:30,012 INFO L85 PathProgramCache]: Analyzing trace with hash -35243063, now seen corresponding path program 2 times [2022-07-21 09:00:30,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:00:30,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481669014] [2022-07-21 09:00:30,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:00:30,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:00:30,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:00:30,050 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:00:30,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:00:30,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481669014] [2022-07-21 09:00:30,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481669014] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:00:30,051 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:00:30,051 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 09:00:30,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26603368] [2022-07-21 09:00:30,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:00:30,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 09:00:30,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:00:30,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 09:00:30,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-21 09:00:30,054 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 218 out of 246 [2022-07-21 09:00:30,055 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 271 transitions, 982 flow. Second operand has 4 states, 4 states have (on average 221.0) internal successors, (884), 4 states have internal predecessors, (884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:00:30,055 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:00:30,056 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 218 of 246 [2022-07-21 09:00:30,056 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:00:30,284 INFO L129 PetriNetUnfolder]: 132/1671 cut-off events. [2022-07-21 09:00:30,284 INFO L130 PetriNetUnfolder]: For 1057/1112 co-relation queries the response was YES. [2022-07-21 09:00:30,294 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2861 conditions, 1671 events. 132/1671 cut-off events. For 1057/1112 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 12169 event pairs, 21 based on Foata normal form. 4/1593 useless extension candidates. Maximal degree in co-relation 2816. Up to 82 conditions per place. [2022-07-21 09:00:30,302 INFO L132 encePairwiseOnDemand]: 242/246 looper letters, 21 selfloop transitions, 2 changer transitions 7/271 dead transitions. [2022-07-21 09:00:30,303 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 271 transitions, 1013 flow [2022-07-21 09:00:30,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 09:00:30,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-07-21 09:00:30,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 894 transitions. [2022-07-21 09:00:30,305 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9085365853658537 [2022-07-21 09:00:30,305 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 894 transitions. [2022-07-21 09:00:30,305 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 894 transitions. [2022-07-21 09:00:30,305 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:00:30,306 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 894 transitions. [2022-07-21 09:00:30,307 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 223.5) internal successors, (894), 4 states have internal predecessors, (894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:00:30,309 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 246.0) internal successors, (1230), 5 states have internal predecessors, (1230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:00:30,309 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 246.0) internal successors, (1230), 5 states have internal predecessors, (1230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:00:30,309 INFO L186 Difference]: Start difference. First operand has 302 places, 271 transitions, 982 flow. Second operand 4 states and 894 transitions. [2022-07-21 09:00:30,309 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 271 transitions, 1013 flow [2022-07-21 09:00:30,319 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 271 transitions, 976 flow, removed 12 selfloop flow, removed 14 redundant places. [2022-07-21 09:00:30,322 INFO L242 Difference]: Finished difference. Result has 275 places, 261 transitions, 894 flow [2022-07-21 09:00:30,323 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=913, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=265, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=894, PETRI_PLACES=275, PETRI_TRANSITIONS=261} [2022-07-21 09:00:30,323 INFO L279 CegarLoopForPetriNet]: 217 programPoint places, 58 predicate places. [2022-07-21 09:00:30,324 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 261 transitions, 894 flow [2022-07-21 09:00:30,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 221.0) internal successors, (884), 4 states have internal predecessors, (884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:00:30,324 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:00:30,324 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] [2022-07-21 09:00:30,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-07-21 09:00:30,325 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:00:30,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:00:30,325 INFO L85 PathProgramCache]: Analyzing trace with hash -1853908145, now seen corresponding path program 5 times [2022-07-21 09:00:30,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:00:30,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023828779] [2022-07-21 09:00:30,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:00:30,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:00:30,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:00:30,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:00:30,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:00:30,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023828779] [2022-07-21 09:00:30,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023828779] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:00:30,425 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:00:30,425 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-21 09:00:30,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727952584] [2022-07-21 09:00:30,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:00:30,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-21 09:00:30,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:00:30,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-21 09:00:30,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-07-21 09:00:30,428 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 246 [2022-07-21 09:00:30,429 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 261 transitions, 894 flow. Second operand has 8 states, 8 states have (on average 186.0) internal successors, (1488), 8 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:00:30,429 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:00:30,429 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 246 [2022-07-21 09:00:30,430 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:00:30,773 INFO L129 PetriNetUnfolder]: 139/1618 cut-off events. [2022-07-21 09:00:30,773 INFO L130 PetriNetUnfolder]: For 1439/1571 co-relation queries the response was YES. [2022-07-21 09:00:30,782 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3147 conditions, 1618 events. 139/1618 cut-off events. For 1439/1571 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 12025 event pairs, 36 based on Foata normal form. 9/1565 useless extension candidates. Maximal degree in co-relation 3112. Up to 496 conditions per place. [2022-07-21 09:00:30,789 INFO L132 encePairwiseOnDemand]: 237/246 looper letters, 66 selfloop transitions, 4 changer transitions 21/274 dead transitions. [2022-07-21 09:00:30,789 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 274 transitions, 1139 flow [2022-07-21 09:00:30,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-21 09:00:30,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-07-21 09:00:30,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2236 transitions. [2022-07-21 09:00:30,799 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7574525745257452 [2022-07-21 09:00:30,799 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2236 transitions. [2022-07-21 09:00:30,799 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2236 transitions. [2022-07-21 09:00:30,801 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:00:30,801 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2236 transitions. [2022-07-21 09:00:30,829 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 186.33333333333334) internal successors, (2236), 12 states have internal predecessors, (2236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:00:30,834 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 246.0) internal successors, (3198), 13 states have internal predecessors, (3198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:00:30,834 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 246.0) internal successors, (3198), 13 states have internal predecessors, (3198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:00:30,835 INFO L186 Difference]: Start difference. First operand has 275 places, 261 transitions, 894 flow. Second operand 12 states and 2236 transitions. [2022-07-21 09:00:30,835 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 274 transitions, 1139 flow [2022-07-21 09:00:30,842 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 274 transitions, 1133 flow, removed 1 selfloop flow, removed 3 redundant places. [2022-07-21 09:00:30,846 INFO L242 Difference]: Finished difference. Result has 284 places, 253 transitions, 838 flow [2022-07-21 09:00:30,846 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=888, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=257, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=838, PETRI_PLACES=284, PETRI_TRANSITIONS=253} [2022-07-21 09:00:30,848 INFO L279 CegarLoopForPetriNet]: 217 programPoint places, 67 predicate places. [2022-07-21 09:00:30,848 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 253 transitions, 838 flow [2022-07-21 09:00:30,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 186.0) internal successors, (1488), 8 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:00:30,849 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:00:30,849 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] [2022-07-21 09:00:30,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-07-21 09:00:30,849 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:00:30,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:00:30,850 INFO L85 PathProgramCache]: Analyzing trace with hash 1256763865, now seen corresponding path program 6 times [2022-07-21 09:00:30,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:00:30,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246471156] [2022-07-21 09:00:30,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:00:30,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:00:30,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:00:30,942 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:00:30,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:00:30,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246471156] [2022-07-21 09:00:30,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246471156] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:00:30,943 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:00:30,943 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-21 09:00:30,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648986120] [2022-07-21 09:00:30,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:00:30,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-21 09:00:30,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:00:30,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-21 09:00:30,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-07-21 09:00:30,945 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 246 [2022-07-21 09:00:30,947 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 253 transitions, 838 flow. Second operand has 8 states, 8 states have (on average 186.0) internal successors, (1488), 8 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:00:30,947 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:00:30,947 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 246 [2022-07-21 09:00:30,947 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:00:31,223 INFO L129 PetriNetUnfolder]: 118/1423 cut-off events. [2022-07-21 09:00:31,224 INFO L130 PetriNetUnfolder]: For 1112/1163 co-relation queries the response was YES. [2022-07-21 09:00:31,232 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2728 conditions, 1423 events. 118/1423 cut-off events. For 1112/1163 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 9830 event pairs, 30 based on Foata normal form. 3/1370 useless extension candidates. Maximal degree in co-relation 2689. Up to 397 conditions per place. [2022-07-21 09:00:31,236 INFO L132 encePairwiseOnDemand]: 237/246 looper letters, 55 selfloop transitions, 0 changer transitions 31/261 dead transitions. [2022-07-21 09:00:31,236 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 261 transitions, 1028 flow [2022-07-21 09:00:31,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-21 09:00:31,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-07-21 09:00:31,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2049 transitions. [2022-07-21 09:00:31,239 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7572062084257206 [2022-07-21 09:00:31,240 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2049 transitions. [2022-07-21 09:00:31,240 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2049 transitions. [2022-07-21 09:00:31,241 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:00:31,241 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2049 transitions. [2022-07-21 09:00:31,244 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 186.27272727272728) internal successors, (2049), 11 states have internal predecessors, (2049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:00:31,247 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 246.0) internal successors, (2952), 12 states have internal predecessors, (2952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:00:31,248 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 246.0) internal successors, (2952), 12 states have internal predecessors, (2952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:00:31,248 INFO L186 Difference]: Start difference. First operand has 284 places, 253 transitions, 838 flow. Second operand 11 states and 2049 transitions. [2022-07-21 09:00:31,248 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 261 transitions, 1028 flow [2022-07-21 09:00:31,255 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 261 transitions, 950 flow, removed 20 selfloop flow, removed 17 redundant places. [2022-07-21 09:00:31,259 INFO L242 Difference]: Finished difference. Result has 268 places, 230 transitions, 631 flow [2022-07-21 09:00:31,259 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=771, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=253, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=631, PETRI_PLACES=268, PETRI_TRANSITIONS=230} [2022-07-21 09:00:31,260 INFO L279 CegarLoopForPetriNet]: 217 programPoint places, 51 predicate places. [2022-07-21 09:00:31,260 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 230 transitions, 631 flow [2022-07-21 09:00:31,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 186.0) internal successors, (1488), 8 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:00:31,261 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:00:31,261 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] [2022-07-21 09:00:31,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-07-21 09:00:31,262 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:00:31,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:00:31,262 INFO L85 PathProgramCache]: Analyzing trace with hash -1969817188, now seen corresponding path program 1 times [2022-07-21 09:00:31,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:00:31,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665861171] [2022-07-21 09:00:31,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:00:31,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:00:31,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:00:31,457 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:00:31,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:00:31,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665861171] [2022-07-21 09:00:31,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665861171] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:00:31,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068717480] [2022-07-21 09:00:31,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:00:31,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:00:31,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:00:31,460 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) [2022-07-21 09:00:31,489 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-21 09:00:31,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:00:31,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-21 09:00:31,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:00:32,117 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:00:32,117 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:00:32,473 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:00:32,473 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2068717480] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-21 09:00:32,474 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-21 09:00:32,474 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [15, 14] total 30 [2022-07-21 09:00:32,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30898717] [2022-07-21 09:00:32,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:00:32,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-21 09:00:32,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:00:32,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-21 09:00:32,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=742, Unknown=0, NotChecked=0, Total=870 [2022-07-21 09:00:32,478 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 246 [2022-07-21 09:00:32,480 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 230 transitions, 631 flow. Second operand has 14 states, 14 states have (on average 163.14285714285714) internal successors, (2284), 14 states have internal predecessors, (2284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:00:32,480 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:00:32,480 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 246 [2022-07-21 09:00:32,480 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:00:33,291 INFO L129 PetriNetUnfolder]: 200/1818 cut-off events. [2022-07-21 09:00:33,292 INFO L130 PetriNetUnfolder]: For 654/667 co-relation queries the response was YES. [2022-07-21 09:00:33,300 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3072 conditions, 1818 events. 200/1818 cut-off events. For 654/667 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 13496 event pairs, 83 based on Foata normal form. 6/1684 useless extension candidates. Maximal degree in co-relation 3044. Up to 224 conditions per place. [2022-07-21 09:00:33,306 INFO L132 encePairwiseOnDemand]: 226/246 looper letters, 144 selfloop transitions, 22 changer transitions 7/312 dead transitions. [2022-07-21 09:00:33,306 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 312 transitions, 1229 flow [2022-07-21 09:00:33,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-21 09:00:33,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2022-07-21 09:00:33,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 3340 transitions. [2022-07-21 09:00:33,312 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6788617886178862 [2022-07-21 09:00:33,312 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 3340 transitions. [2022-07-21 09:00:33,312 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 3340 transitions. [2022-07-21 09:00:33,314 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:00:33,314 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 3340 transitions. [2022-07-21 09:00:33,318 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 167.0) internal successors, (3340), 20 states have internal predecessors, (3340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:00:33,325 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 246.0) internal successors, (5166), 21 states have internal predecessors, (5166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:00:33,325 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 246.0) internal successors, (5166), 21 states have internal predecessors, (5166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:00:33,326 INFO L186 Difference]: Start difference. First operand has 268 places, 230 transitions, 631 flow. Second operand 20 states and 3340 transitions. [2022-07-21 09:00:33,326 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 312 transitions, 1229 flow [2022-07-21 09:00:33,331 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 312 transitions, 1197 flow, removed 16 selfloop flow, removed 4 redundant places. [2022-07-21 09:00:33,334 INFO L242 Difference]: Finished difference. Result has 263 places, 236 transitions, 725 flow [2022-07-21 09:00:33,335 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=621, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=725, PETRI_PLACES=263, PETRI_TRANSITIONS=236} [2022-07-21 09:00:33,335 INFO L279 CegarLoopForPetriNet]: 217 programPoint places, 46 predicate places. [2022-07-21 09:00:33,335 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 236 transitions, 725 flow [2022-07-21 09:00:33,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 163.14285714285714) internal successors, (2284), 14 states have internal predecessors, (2284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:00:33,337 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:00:33,337 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] [2022-07-21 09:00:33,365 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-21 09:00:33,551 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,SelfDestructingSolverStorable21 [2022-07-21 09:00:33,552 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:00:33,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:00:33,552 INFO L85 PathProgramCache]: Analyzing trace with hash -763051188, now seen corresponding path program 2 times [2022-07-21 09:00:33,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:00:33,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094439002] [2022-07-21 09:00:33,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:00:33,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:00:33,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:00:33,733 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:00:33,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:00:33,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094439002] [2022-07-21 09:00:33,733 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094439002] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:00:33,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416874070] [2022-07-21 09:00:33,734 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 09:00:33,734 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:00:33,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:00:33,736 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) [2022-07-21 09:00:33,737 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-21 09:00:33,837 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-07-21 09:00:33,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:00:33,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 25 conjunts are in the unsatisfiable core [2022-07-21 09:00:33,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:00:34,466 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 09:00:34,466 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 09:00:34,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [416874070] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:00:34,466 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-21 09:00:34,467 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [15] total 28 [2022-07-21 09:00:34,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229665907] [2022-07-21 09:00:34,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:00:34,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-21 09:00:34,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:00:34,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-21 09:00:34,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=681, Unknown=0, NotChecked=0, Total=756 [2022-07-21 09:00:34,470 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 246 [2022-07-21 09:00:34,472 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 236 transitions, 725 flow. Second operand has 18 states, 18 states have (on average 162.22222222222223) internal successors, (2920), 18 states have internal predecessors, (2920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:00:34,472 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:00:34,472 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 246 [2022-07-21 09:00:34,472 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:00:35,759 INFO L129 PetriNetUnfolder]: 203/1907 cut-off events. [2022-07-21 09:00:35,760 INFO L130 PetriNetUnfolder]: For 1024/1044 co-relation queries the response was YES. [2022-07-21 09:00:35,771 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3329 conditions, 1907 events. 203/1907 cut-off events. For 1024/1044 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 14467 event pairs, 62 based on Foata normal form. 6/1769 useless extension candidates. Maximal degree in co-relation 3297. Up to 213 conditions per place. [2022-07-21 09:00:35,776 INFO L132 encePairwiseOnDemand]: 218/246 looper letters, 115 selfloop transitions, 33 changer transitions 17/304 dead transitions. [2022-07-21 09:00:35,776 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 304 transitions, 1278 flow [2022-07-21 09:00:35,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-07-21 09:00:35,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2022-07-21 09:00:35,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 4439 transitions. [2022-07-21 09:00:35,784 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6683227943390545 [2022-07-21 09:00:35,785 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 4439 transitions. [2022-07-21 09:00:35,785 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 4439 transitions. [2022-07-21 09:00:35,787 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:00:35,787 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 4439 transitions. [2022-07-21 09:00:35,793 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 164.40740740740742) internal successors, (4439), 27 states have internal predecessors, (4439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:00:35,803 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 246.0) internal successors, (6888), 28 states have internal predecessors, (6888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:00:35,804 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 246.0) internal successors, (6888), 28 states have internal predecessors, (6888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:00:35,805 INFO L186 Difference]: Start difference. First operand has 263 places, 236 transitions, 725 flow. Second operand 27 states and 4439 transitions. [2022-07-21 09:00:35,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 304 transitions, 1278 flow [2022-07-21 09:00:35,810 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 304 transitions, 1223 flow, removed 17 selfloop flow, removed 11 redundant places. [2022-07-21 09:00:35,819 INFO L242 Difference]: Finished difference. Result has 282 places, 251 transitions, 855 flow [2022-07-21 09:00:35,819 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=690, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=855, PETRI_PLACES=282, PETRI_TRANSITIONS=251} [2022-07-21 09:00:35,820 INFO L279 CegarLoopForPetriNet]: 217 programPoint places, 65 predicate places. [2022-07-21 09:00:35,820 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 251 transitions, 855 flow [2022-07-21 09:00:35,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 162.22222222222223) internal successors, (2920), 18 states have internal predecessors, (2920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:00:35,821 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:00:35,822 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] [2022-07-21 09:00:35,847 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-21 09:00:36,036 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,SelfDestructingSolverStorable22 [2022-07-21 09:00:36,037 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:00:36,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:00:36,037 INFO L85 PathProgramCache]: Analyzing trace with hash 1596680157, now seen corresponding path program 1 times [2022-07-21 09:00:36,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:00:36,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613276658] [2022-07-21 09:00:36,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:00:36,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:00:36,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:00:36,219 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:00:36,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:00:36,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613276658] [2022-07-21 09:00:36,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613276658] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:00:36,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314713676] [2022-07-21 09:00:36,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:00:36,220 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:00:36,220 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:00:36,221 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) [2022-07-21 09:00:36,223 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-21 09:00:36,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:00:36,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-21 09:00:36,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:00:36,728 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:00:36,729 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:00:37,153 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:00:37,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1314713676] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-21 09:00:37,154 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-21 09:00:37,154 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [15, 14] total 30 [2022-07-21 09:00:37,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153925289] [2022-07-21 09:00:37,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:00:37,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-21 09:00:37,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:00:37,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-21 09:00:37,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=742, Unknown=0, NotChecked=0, Total=870 [2022-07-21 09:00:37,160 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 246 [2022-07-21 09:00:37,161 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 251 transitions, 855 flow. Second operand has 14 states, 14 states have (on average 163.14285714285714) internal successors, (2284), 14 states have internal predecessors, (2284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:00:37,161 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:00:37,162 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 246 [2022-07-21 09:00:37,162 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:00:37,842 INFO L129 PetriNetUnfolder]: 262/2374 cut-off events. [2022-07-21 09:00:37,842 INFO L130 PetriNetUnfolder]: For 1738/1761 co-relation queries the response was YES. [2022-07-21 09:00:37,855 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4396 conditions, 2374 events. 262/2374 cut-off events. For 1738/1761 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 19414 event pairs, 106 based on Foata normal form. 6/2186 useless extension candidates. Maximal degree in co-relation 4359. Up to 367 conditions per place. [2022-07-21 09:00:37,862 INFO L132 encePairwiseOnDemand]: 229/246 looper letters, 158 selfloop transitions, 23 changer transitions 11/331 dead transitions. [2022-07-21 09:00:37,862 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 331 transitions, 1557 flow [2022-07-21 09:00:37,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-21 09:00:37,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-07-21 09:00:37,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 3027 transitions. [2022-07-21 09:00:37,866 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6836043360433605 [2022-07-21 09:00:37,866 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 3027 transitions. [2022-07-21 09:00:37,866 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 3027 transitions. [2022-07-21 09:00:37,867 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:00:37,868 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 3027 transitions. [2022-07-21 09:00:37,871 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 168.16666666666666) internal successors, (3027), 18 states have internal predecessors, (3027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:00:37,876 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 246.0) internal successors, (4674), 19 states have internal predecessors, (4674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:00:37,877 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 246.0) internal successors, (4674), 19 states have internal predecessors, (4674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:00:37,877 INFO L186 Difference]: Start difference. First operand has 282 places, 251 transitions, 855 flow. Second operand 18 states and 3027 transitions. [2022-07-21 09:00:37,877 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 331 transitions, 1557 flow [2022-07-21 09:00:37,886 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 331 transitions, 1494 flow, removed 18 selfloop flow, removed 16 redundant places. [2022-07-21 09:00:37,890 INFO L242 Difference]: Finished difference. Result has 281 places, 255 transitions, 923 flow [2022-07-21 09:00:37,891 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=820, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=923, PETRI_PLACES=281, PETRI_TRANSITIONS=255} [2022-07-21 09:00:37,891 INFO L279 CegarLoopForPetriNet]: 217 programPoint places, 64 predicate places. [2022-07-21 09:00:37,891 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 255 transitions, 923 flow [2022-07-21 09:00:37,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 163.14285714285714) internal successors, (2284), 14 states have internal predecessors, (2284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:00:37,892 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:00:37,892 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] [2022-07-21 09:00:37,919 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-21 09:00:38,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:00:38,115 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:00:38,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:00:38,116 INFO L85 PathProgramCache]: Analyzing trace with hash 787751393, now seen corresponding path program 2 times [2022-07-21 09:00:38,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:00:38,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412950701] [2022-07-21 09:00:38,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:00:38,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:00:38,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:00:38,280 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:00:38,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:00:38,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412950701] [2022-07-21 09:00:38,280 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412950701] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:00:38,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074469136] [2022-07-21 09:00:38,281 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 09:00:38,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:00:38,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:00:38,282 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:00:38,312 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-21 09:00:38,389 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-07-21 09:00:38,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:00:38,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 24 conjunts are in the unsatisfiable core [2022-07-21 09:00:38,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:00:38,758 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 09:00:38,759 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 09:00:38,759 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2074469136] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:00:38,759 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-21 09:00:38,759 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [15] total 27 [2022-07-21 09:00:38,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836773514] [2022-07-21 09:00:38,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:00:38,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-21 09:00:38,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:00:38,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-21 09:00:38,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=626, Unknown=0, NotChecked=0, Total=702 [2022-07-21 09:00:38,762 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 177 out of 246 [2022-07-21 09:00:38,763 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 255 transitions, 923 flow. Second operand has 14 states, 14 states have (on average 180.14285714285714) internal successors, (2522), 14 states have internal predecessors, (2522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:00:38,763 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:00:38,763 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 177 of 246 [2022-07-21 09:00:38,764 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:00:39,599 INFO L129 PetriNetUnfolder]: 244/2464 cut-off events. [2022-07-21 09:00:39,599 INFO L130 PetriNetUnfolder]: For 1968/2013 co-relation queries the response was YES. [2022-07-21 09:00:39,611 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4673 conditions, 2464 events. 244/2464 cut-off events. For 1968/2013 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 20258 event pairs, 101 based on Foata normal form. 18/2303 useless extension candidates. Maximal degree in co-relation 4632. Up to 447 conditions per place. [2022-07-21 09:00:39,616 INFO L132 encePairwiseOnDemand]: 224/246 looper letters, 62 selfloop transitions, 46 changer transitions 24/303 dead transitions. [2022-07-21 09:00:39,617 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 303 transitions, 1423 flow [2022-07-21 09:00:39,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-21 09:00:39,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-07-21 09:00:39,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 3266 transitions. [2022-07-21 09:00:39,621 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7375790424570913 [2022-07-21 09:00:39,621 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 3266 transitions. [2022-07-21 09:00:39,621 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 3266 transitions. [2022-07-21 09:00:39,622 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:00:39,622 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 3266 transitions. [2022-07-21 09:00:39,626 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 181.44444444444446) internal successors, (3266), 18 states have internal predecessors, (3266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:00:39,630 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 246.0) internal successors, (4674), 19 states have internal predecessors, (4674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:00:39,631 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 246.0) internal successors, (4674), 19 states have internal predecessors, (4674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:00:39,631 INFO L186 Difference]: Start difference. First operand has 281 places, 255 transitions, 923 flow. Second operand 18 states and 3266 transitions. [2022-07-21 09:00:39,631 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 303 transitions, 1423 flow [2022-07-21 09:00:39,641 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 303 transitions, 1366 flow, removed 18 selfloop flow, removed 10 redundant places. [2022-07-21 09:00:39,646 INFO L242 Difference]: Finished difference. Result has 292 places, 267 transitions, 1073 flow [2022-07-21 09:00:39,647 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=884, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=255, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1073, PETRI_PLACES=292, PETRI_TRANSITIONS=267} [2022-07-21 09:00:39,648 INFO L279 CegarLoopForPetriNet]: 217 programPoint places, 75 predicate places. [2022-07-21 09:00:39,648 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 267 transitions, 1073 flow [2022-07-21 09:00:39,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 180.14285714285714) internal successors, (2522), 14 states have internal predecessors, (2522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:00:39,649 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:00:39,649 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, 1, 1, 1, 1] [2022-07-21 09:00:39,678 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-21 09:00:39,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:00:39,874 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:00:39,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:00:39,875 INFO L85 PathProgramCache]: Analyzing trace with hash -1121357044, now seen corresponding path program 1 times [2022-07-21 09:00:39,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:00:39,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560881339] [2022-07-21 09:00:39,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:00:39,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:00:39,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:00:39,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:00:39,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:00:39,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560881339] [2022-07-21 09:00:39,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560881339] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:00:39,931 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:00:39,931 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-21 09:00:39,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309047115] [2022-07-21 09:00:39,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:00:39,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-21 09:00:39,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:00:39,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-21 09:00:39,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-21 09:00:39,934 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 246 [2022-07-21 09:00:39,935 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 267 transitions, 1073 flow. Second operand has 7 states, 7 states have (on average 195.28571428571428) internal successors, (1367), 7 states have internal predecessors, (1367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:00:39,935 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:00:39,935 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 246 [2022-07-21 09:00:39,935 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:00:40,288 INFO L129 PetriNetUnfolder]: 318/1882 cut-off events. [2022-07-21 09:00:40,289 INFO L130 PetriNetUnfolder]: For 2388/2415 co-relation queries the response was YES. [2022-07-21 09:00:40,297 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3656 conditions, 1882 events. 318/1882 cut-off events. For 2388/2415 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 13251 event pairs, 143 based on Foata normal form. 1/1667 useless extension candidates. Maximal degree in co-relation 3613. Up to 430 conditions per place. [2022-07-21 09:00:40,302 INFO L132 encePairwiseOnDemand]: 235/246 looper letters, 69 selfloop transitions, 12 changer transitions 8/272 dead transitions. [2022-07-21 09:00:40,302 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 272 transitions, 1226 flow [2022-07-21 09:00:40,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-21 09:00:40,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-07-21 09:00:40,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1985 transitions. [2022-07-21 09:00:40,305 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.806910569105691 [2022-07-21 09:00:40,305 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1985 transitions. [2022-07-21 09:00:40,305 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1985 transitions. [2022-07-21 09:00:40,306 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:00:40,306 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1985 transitions. [2022-07-21 09:00:40,308 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 198.5) internal successors, (1985), 10 states have internal predecessors, (1985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:00:40,310 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 246.0) internal successors, (2706), 11 states have internal predecessors, (2706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:00:40,310 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 246.0) internal successors, (2706), 11 states have internal predecessors, (2706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:00:40,310 INFO L186 Difference]: Start difference. First operand has 292 places, 267 transitions, 1073 flow. Second operand 10 states and 1985 transitions. [2022-07-21 09:00:40,311 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 272 transitions, 1226 flow [2022-07-21 09:00:40,323 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 272 transitions, 1201 flow, removed 10 selfloop flow, removed 9 redundant places. [2022-07-21 09:00:40,327 INFO L242 Difference]: Finished difference. Result has 281 places, 249 transitions, 932 flow [2022-07-21 09:00:40,328 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=933, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=932, PETRI_PLACES=281, PETRI_TRANSITIONS=249} [2022-07-21 09:00:40,328 INFO L279 CegarLoopForPetriNet]: 217 programPoint places, 64 predicate places. [2022-07-21 09:00:40,328 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 249 transitions, 932 flow [2022-07-21 09:00:40,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 195.28571428571428) internal successors, (1367), 7 states have internal predecessors, (1367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:00:40,329 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:00:40,329 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, 1, 1, 1, 1] [2022-07-21 09:00:40,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-07-21 09:00:40,329 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:00:40,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:00:40,330 INFO L85 PathProgramCache]: Analyzing trace with hash 1013334828, now seen corresponding path program 1 times [2022-07-21 09:00:40,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:00:40,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311783694] [2022-07-21 09:00:40,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:00:40,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:00:40,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:00:40,389 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:00:40,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:00:40,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311783694] [2022-07-21 09:00:40,390 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311783694] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:00:40,390 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:00:40,390 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-21 09:00:40,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412915935] [2022-07-21 09:00:40,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:00:40,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-21 09:00:40,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:00:40,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-21 09:00:40,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-21 09:00:40,392 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 246 [2022-07-21 09:00:40,393 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 249 transitions, 932 flow. Second operand has 7 states, 7 states have (on average 195.28571428571428) internal successors, (1367), 7 states have internal predecessors, (1367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:00:40,393 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:00:40,394 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 246 [2022-07-21 09:00:40,394 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:00:40,672 INFO L129 PetriNetUnfolder]: 182/1316 cut-off events. [2022-07-21 09:00:40,672 INFO L130 PetriNetUnfolder]: For 2028/2052 co-relation queries the response was YES. [2022-07-21 09:00:40,677 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2609 conditions, 1316 events. 182/1316 cut-off events. For 2028/2052 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 8252 event pairs, 114 based on Foata normal form. 0/1224 useless extension candidates. Maximal degree in co-relation 2572. Up to 321 conditions per place. [2022-07-21 09:00:40,680 INFO L132 encePairwiseOnDemand]: 235/246 looper letters, 45 selfloop transitions, 8 changer transitions 32/255 dead transitions. [2022-07-21 09:00:40,680 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 255 transitions, 1080 flow [2022-07-21 09:00:40,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-21 09:00:40,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-07-21 09:00:40,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1980 transitions. [2022-07-21 09:00:40,683 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8048780487804879 [2022-07-21 09:00:40,683 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1980 transitions. [2022-07-21 09:00:40,683 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1980 transitions. [2022-07-21 09:00:40,683 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:00:40,683 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1980 transitions. [2022-07-21 09:00:40,685 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 198.0) internal successors, (1980), 10 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:00:40,687 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 246.0) internal successors, (2706), 11 states have internal predecessors, (2706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:00:40,687 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 246.0) internal successors, (2706), 11 states have internal predecessors, (2706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:00:40,688 INFO L186 Difference]: Start difference. First operand has 281 places, 249 transitions, 932 flow. Second operand 10 states and 1980 transitions. [2022-07-21 09:00:40,688 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 255 transitions, 1080 flow [2022-07-21 09:00:40,695 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 255 transitions, 1021 flow, removed 17 selfloop flow, removed 11 redundant places. [2022-07-21 09:00:40,699 INFO L242 Difference]: Finished difference. Result has 278 places, 221 transitions, 689 flow [2022-07-21 09:00:40,699 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=795, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=689, PETRI_PLACES=278, PETRI_TRANSITIONS=221} [2022-07-21 09:00:40,700 INFO L279 CegarLoopForPetriNet]: 217 programPoint places, 61 predicate places. [2022-07-21 09:00:40,700 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 221 transitions, 689 flow [2022-07-21 09:00:40,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 195.28571428571428) internal successors, (1367), 7 states have internal predecessors, (1367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:00:40,700 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:00:40,700 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, 1, 1, 1, 1, 1] [2022-07-21 09:00:40,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-07-21 09:00:40,701 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:00:40,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:00:40,701 INFO L85 PathProgramCache]: Analyzing trace with hash 1744496546, now seen corresponding path program 1 times [2022-07-21 09:00:40,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:00:40,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060889081] [2022-07-21 09:00:40,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:00:40,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:00:40,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:00:40,849 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:00:40,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:00:40,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060889081] [2022-07-21 09:00:40,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060889081] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:00:40,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576774464] [2022-07-21 09:00:40,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:00:40,850 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:00:40,850 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:00:40,852 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:00:40,876 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-21 09:00:40,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:00:40,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-21 09:00:40,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:00:41,200 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:00:41,200 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:00:41,542 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:00:41,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [576774464] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-21 09:00:41,542 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-21 09:00:41,543 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [13, 11] total 23 [2022-07-21 09:00:41,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240407923] [2022-07-21 09:00:41,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:00:41,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-21 09:00:41,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:00:41,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-21 09:00:41,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=385, Unknown=0, NotChecked=0, Total=506 [2022-07-21 09:00:41,546 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 189 out of 246 [2022-07-21 09:00:41,547 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 221 transitions, 689 flow. Second operand has 11 states, 11 states have (on average 192.36363636363637) internal successors, (2116), 11 states have internal predecessors, (2116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:00:41,547 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:00:41,547 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 189 of 246 [2022-07-21 09:00:41,547 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:00:41,936 INFO L129 PetriNetUnfolder]: 182/1293 cut-off events. [2022-07-21 09:00:41,936 INFO L130 PetriNetUnfolder]: For 1360/1384 co-relation queries the response was YES. [2022-07-21 09:00:41,943 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2360 conditions, 1293 events. 182/1293 cut-off events. For 1360/1384 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 8370 event pairs, 70 based on Foata normal form. 7/1223 useless extension candidates. Maximal degree in co-relation 2325. Up to 107 conditions per place. [2022-07-21 09:00:41,947 INFO L132 encePairwiseOnDemand]: 232/246 looper letters, 72 selfloop transitions, 15 changer transitions 0/255 dead transitions. [2022-07-21 09:00:41,948 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 255 transitions, 1024 flow [2022-07-21 09:00:41,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-21 09:00:41,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-07-21 09:00:41,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2727 transitions. [2022-07-21 09:00:41,951 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7918118466898955 [2022-07-21 09:00:41,951 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2727 transitions. [2022-07-21 09:00:41,951 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2727 transitions. [2022-07-21 09:00:41,952 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:00:41,952 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2727 transitions. [2022-07-21 09:00:41,955 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 194.78571428571428) internal successors, (2727), 14 states have internal predecessors, (2727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:00:41,957 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 246.0) internal successors, (3690), 15 states have internal predecessors, (3690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:00:41,958 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 246.0) internal successors, (3690), 15 states have internal predecessors, (3690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:00:41,958 INFO L186 Difference]: Start difference. First operand has 278 places, 221 transitions, 689 flow. Second operand 14 states and 2727 transitions. [2022-07-21 09:00:41,958 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 255 transitions, 1024 flow [2022-07-21 09:00:41,964 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 255 transitions, 912 flow, removed 31 selfloop flow, removed 25 redundant places. [2022-07-21 09:00:41,967 INFO L242 Difference]: Finished difference. Result has 246 places, 225 transitions, 658 flow [2022-07-21 09:00:41,968 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=607, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=658, PETRI_PLACES=246, PETRI_TRANSITIONS=225} [2022-07-21 09:00:41,968 INFO L279 CegarLoopForPetriNet]: 217 programPoint places, 29 predicate places. [2022-07-21 09:00:41,968 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 225 transitions, 658 flow [2022-07-21 09:00:41,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 192.36363636363637) internal successors, (2116), 11 states have internal predecessors, (2116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:00:41,969 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:00:41,969 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:00:41,995 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-21 09:00:42,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-07-21 09:00:42,193 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:00:42,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:00:42,194 INFO L85 PathProgramCache]: Analyzing trace with hash -1895043908, now seen corresponding path program 1 times [2022-07-21 09:00:42,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:00:42,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339447458] [2022-07-21 09:00:42,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:00:42,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:00:42,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:00:42,258 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 09:00:42,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:00:42,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339447458] [2022-07-21 09:00:42,258 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339447458] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:00:42,259 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:00:42,259 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-21 09:00:42,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596418629] [2022-07-21 09:00:42,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:00:42,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-21 09:00:42,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:00:42,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-21 09:00:42,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-21 09:00:42,261 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 246 [2022-07-21 09:00:42,262 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 225 transitions, 658 flow. Second operand has 7 states, 7 states have (on average 195.85714285714286) internal successors, (1371), 7 states have internal predecessors, (1371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:00:42,262 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:00:42,263 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 246 [2022-07-21 09:00:42,263 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:00:42,432 INFO L129 PetriNetUnfolder]: 148/967 cut-off events. [2022-07-21 09:00:42,432 INFO L130 PetriNetUnfolder]: For 547/594 co-relation queries the response was YES. [2022-07-21 09:00:42,435 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1726 conditions, 967 events. 148/967 cut-off events. For 547/594 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 5125 event pairs, 67 based on Foata normal form. 28/917 useless extension candidates. Maximal degree in co-relation 1702. Up to 205 conditions per place. [2022-07-21 09:00:42,438 INFO L132 encePairwiseOnDemand]: 237/246 looper letters, 56 selfloop transitions, 8 changer transitions 6/242 dead transitions. [2022-07-21 09:00:42,438 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 242 transitions, 875 flow [2022-07-21 09:00:42,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-21 09:00:42,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-07-21 09:00:42,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1591 transitions. [2022-07-21 09:00:42,440 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8084349593495935 [2022-07-21 09:00:42,440 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1591 transitions. [2022-07-21 09:00:42,440 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1591 transitions. [2022-07-21 09:00:42,441 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:00:42,441 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1591 transitions. [2022-07-21 09:00:42,443 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 198.875) internal successors, (1591), 8 states have internal predecessors, (1591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:00:42,444 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 246.0) internal successors, (2214), 9 states have internal predecessors, (2214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:00:42,445 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 246.0) internal successors, (2214), 9 states have internal predecessors, (2214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:00:42,445 INFO L186 Difference]: Start difference. First operand has 246 places, 225 transitions, 658 flow. Second operand 8 states and 1591 transitions. [2022-07-21 09:00:42,445 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 242 transitions, 875 flow [2022-07-21 09:00:42,449 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 242 transitions, 853 flow, removed 1 selfloop flow, removed 9 redundant places. [2022-07-21 09:00:42,452 INFO L242 Difference]: Finished difference. Result has 247 places, 225 transitions, 653 flow [2022-07-21 09:00:42,453 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=637, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=653, PETRI_PLACES=247, PETRI_TRANSITIONS=225} [2022-07-21 09:00:42,455 INFO L279 CegarLoopForPetriNet]: 217 programPoint places, 30 predicate places. [2022-07-21 09:00:42,456 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 225 transitions, 653 flow [2022-07-21 09:00:42,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 195.85714285714286) internal successors, (1371), 7 states have internal predecessors, (1371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:00:42,456 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:00:42,456 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:00:42,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-07-21 09:00:42,457 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:00:42,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:00:42,457 INFO L85 PathProgramCache]: Analyzing trace with hash -2092362064, now seen corresponding path program 1 times [2022-07-21 09:00:42,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:00:42,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527779891] [2022-07-21 09:00:42,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:00:42,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:00:42,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:00:42,526 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 09:00:42,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:00:42,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527779891] [2022-07-21 09:00:42,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527779891] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:00:42,527 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:00:42,527 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-21 09:00:42,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295810792] [2022-07-21 09:00:42,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:00:42,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-21 09:00:42,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:00:42,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-21 09:00:42,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-21 09:00:42,530 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 246 [2022-07-21 09:00:42,531 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 225 transitions, 653 flow. Second operand has 7 states, 7 states have (on average 195.85714285714286) internal successors, (1371), 7 states have internal predecessors, (1371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:00:42,531 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:00:42,532 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 246 [2022-07-21 09:00:42,532 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:00:42,704 INFO L129 PetriNetUnfolder]: 93/717 cut-off events. [2022-07-21 09:00:42,704 INFO L130 PetriNetUnfolder]: For 464/467 co-relation queries the response was YES. [2022-07-21 09:00:42,707 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1332 conditions, 717 events. 93/717 cut-off events. For 464/467 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 3248 event pairs, 58 based on Foata normal form. 4/682 useless extension candidates. Maximal degree in co-relation 1306. Up to 171 conditions per place. [2022-07-21 09:00:42,709 INFO L132 encePairwiseOnDemand]: 237/246 looper letters, 46 selfloop transitions, 6 changer transitions 11/233 dead transitions. [2022-07-21 09:00:42,710 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 233 transitions, 806 flow [2022-07-21 09:00:42,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-21 09:00:42,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-07-21 09:00:42,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1586 transitions. [2022-07-21 09:00:42,712 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8058943089430894 [2022-07-21 09:00:42,713 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1586 transitions. [2022-07-21 09:00:42,713 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1586 transitions. [2022-07-21 09:00:42,713 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:00:42,713 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1586 transitions. [2022-07-21 09:00:42,716 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 198.25) internal successors, (1586), 8 states have internal predecessors, (1586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:00:42,717 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 246.0) internal successors, (2214), 9 states have internal predecessors, (2214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:00:42,718 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 246.0) internal successors, (2214), 9 states have internal predecessors, (2214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:00:42,718 INFO L186 Difference]: Start difference. First operand has 247 places, 225 transitions, 653 flow. Second operand 8 states and 1586 transitions. [2022-07-21 09:00:42,718 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 233 transitions, 806 flow [2022-07-21 09:00:42,721 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 233 transitions, 789 flow, removed 1 selfloop flow, removed 6 redundant places. [2022-07-21 09:00:42,724 INFO L242 Difference]: Finished difference. Result has 246 places, 220 transitions, 620 flow [2022-07-21 09:00:42,725 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=628, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=620, PETRI_PLACES=246, PETRI_TRANSITIONS=220} [2022-07-21 09:00:42,725 INFO L279 CegarLoopForPetriNet]: 217 programPoint places, 29 predicate places. [2022-07-21 09:00:42,725 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 220 transitions, 620 flow [2022-07-21 09:00:42,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 195.85714285714286) internal successors, (1371), 7 states have internal predecessors, (1371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:00:42,726 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:00:42,726 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:00:42,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-07-21 09:00:42,726 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:00:42,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:00:42,727 INFO L85 PathProgramCache]: Analyzing trace with hash -27324223, now seen corresponding path program 1 times [2022-07-21 09:00:42,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:00:42,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383939567] [2022-07-21 09:00:42,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:00:42,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:00:42,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:00:42,870 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 09:00:42,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:00:42,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383939567] [2022-07-21 09:00:42,870 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383939567] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:00:42,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441677638] [2022-07-21 09:00:42,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:00:42,871 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:00:42,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:00:42,872 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:00:42,873 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-21 09:00:43,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:00:43,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-21 09:00:43,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:00:43,275 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 09:00:43,275 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:00:43,605 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 09:00:43,605 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1441677638] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-21 09:00:43,605 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-21 09:00:43,606 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [13, 11] total 23 [2022-07-21 09:00:43,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038417815] [2022-07-21 09:00:43,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:00:43,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-21 09:00:43,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:00:43,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-21 09:00:43,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=383, Unknown=0, NotChecked=0, Total=506 [2022-07-21 09:00:43,609 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 189 out of 246 [2022-07-21 09:00:43,610 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 220 transitions, 620 flow. Second operand has 11 states, 11 states have (on average 192.45454545454547) internal successors, (2117), 11 states have internal predecessors, (2117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:00:43,610 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:00:43,611 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 189 of 246 [2022-07-21 09:00:43,611 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:00:43,881 INFO L129 PetriNetUnfolder]: 115/797 cut-off events. [2022-07-21 09:00:43,881 INFO L130 PetriNetUnfolder]: For 366/396 co-relation queries the response was YES. [2022-07-21 09:00:43,884 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1401 conditions, 797 events. 115/797 cut-off events. For 366/396 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 3957 event pairs, 24 based on Foata normal form. 36/784 useless extension candidates. Maximal degree in co-relation 1376. Up to 139 conditions per place. [2022-07-21 09:00:43,885 INFO L132 encePairwiseOnDemand]: 232/246 looper letters, 48 selfloop transitions, 13 changer transitions 0/229 dead transitions. [2022-07-21 09:00:43,886 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 229 transitions, 788 flow [2022-07-21 09:00:43,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-21 09:00:43,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-07-21 09:00:43,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2512 transitions. [2022-07-21 09:00:43,888 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7854909318323953 [2022-07-21 09:00:43,888 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2512 transitions. [2022-07-21 09:00:43,888 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2512 transitions. [2022-07-21 09:00:43,889 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:00:43,889 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2512 transitions. [2022-07-21 09:00:43,892 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 193.23076923076923) internal successors, (2512), 13 states have internal predecessors, (2512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:00:43,895 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 246.0) internal successors, (3444), 14 states have internal predecessors, (3444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:00:43,895 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 246.0) internal successors, (3444), 14 states have internal predecessors, (3444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:00:43,896 INFO L186 Difference]: Start difference. First operand has 246 places, 220 transitions, 620 flow. Second operand 13 states and 2512 transitions. [2022-07-21 09:00:43,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 229 transitions, 788 flow [2022-07-21 09:00:43,899 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 229 transitions, 757 flow, removed 7 selfloop flow, removed 9 redundant places. [2022-07-21 09:00:43,902 INFO L242 Difference]: Finished difference. Result has 246 places, 221 transitions, 635 flow [2022-07-21 09:00:43,902 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=596, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=635, PETRI_PLACES=246, PETRI_TRANSITIONS=221} [2022-07-21 09:00:43,903 INFO L279 CegarLoopForPetriNet]: 217 programPoint places, 29 predicate places. [2022-07-21 09:00:43,903 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 221 transitions, 635 flow [2022-07-21 09:00:43,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 192.45454545454547) internal successors, (2117), 11 states have internal predecessors, (2117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:00:43,904 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:00:43,904 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:00:43,932 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-07-21 09:00:44,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:00:44,124 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:00:44,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:00:44,124 INFO L85 PathProgramCache]: Analyzing trace with hash 917365674, now seen corresponding path program 1 times [2022-07-21 09:00:44,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:00:44,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229414562] [2022-07-21 09:00:44,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:00:44,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:00:44,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:00:44,516 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 09:00:44,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:00:44,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229414562] [2022-07-21 09:00:44,517 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229414562] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:00:44,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832346709] [2022-07-21 09:00:44,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:00:44,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:00:44,517 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:00:44,518 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:00:44,519 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-21 09:00:44,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:00:44,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 29 conjunts are in the unsatisfiable core [2022-07-21 09:00:44,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:00:45,501 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 09:00:45,501 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:00:46,316 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 09:00:46,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [832346709] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:00:46,316 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:00:46,317 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20, 20] total 46 [2022-07-21 09:00:46,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797858170] [2022-07-21 09:00:46,317 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:00:46,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-07-21 09:00:46,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:00:46,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-07-21 09:00:46,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=286, Invalid=1784, Unknown=0, NotChecked=0, Total=2070 [2022-07-21 09:00:46,323 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 246 [2022-07-21 09:00:46,326 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 221 transitions, 635 flow. Second operand has 46 states, 46 states have (on average 153.3695652173913) internal successors, (7055), 46 states have internal predecessors, (7055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:00:46,327 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:00:46,327 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 246 [2022-07-21 09:00:46,327 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:00:48,368 INFO L129 PetriNetUnfolder]: 477/2901 cut-off events. [2022-07-21 09:00:48,369 INFO L130 PetriNetUnfolder]: For 1357/1480 co-relation queries the response was YES. [2022-07-21 09:00:48,376 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5530 conditions, 2901 events. 477/2901 cut-off events. For 1357/1480 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 24602 event pairs, 203 based on Foata normal form. 123/2843 useless extension candidates. Maximal degree in co-relation 5507. Up to 317 conditions per place. [2022-07-21 09:00:48,382 INFO L132 encePairwiseOnDemand]: 222/246 looper letters, 255 selfloop transitions, 41 changer transitions 29/455 dead transitions. [2022-07-21 09:00:48,383 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 455 transitions, 2153 flow [2022-07-21 09:00:48,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-07-21 09:00:48,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2022-07-21 09:00:48,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 5680 transitions. [2022-07-21 09:00:48,389 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6413730803974707 [2022-07-21 09:00:48,389 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 5680 transitions. [2022-07-21 09:00:48,390 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 5680 transitions. [2022-07-21 09:00:48,391 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:00:48,391 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 5680 transitions. [2022-07-21 09:00:48,398 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 157.77777777777777) internal successors, (5680), 36 states have internal predecessors, (5680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:00:48,405 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 246.0) internal successors, (9102), 37 states have internal predecessors, (9102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:00:48,406 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 246.0) internal successors, (9102), 37 states have internal predecessors, (9102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:00:48,407 INFO L186 Difference]: Start difference. First operand has 246 places, 221 transitions, 635 flow. Second operand 36 states and 5680 transitions. [2022-07-21 09:00:48,407 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 455 transitions, 2153 flow [2022-07-21 09:00:48,413 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 455 transitions, 2109 flow, removed 0 selfloop flow, removed 11 redundant places. [2022-07-21 09:00:48,417 INFO L242 Difference]: Finished difference. Result has 286 places, 248 transitions, 897 flow [2022-07-21 09:00:48,418 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=613, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=897, PETRI_PLACES=286, PETRI_TRANSITIONS=248} [2022-07-21 09:00:48,419 INFO L279 CegarLoopForPetriNet]: 217 programPoint places, 69 predicate places. [2022-07-21 09:00:48,419 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 248 transitions, 897 flow [2022-07-21 09:00:48,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 153.3695652173913) internal successors, (7055), 46 states have internal predecessors, (7055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:00:48,420 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:00:48,420 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:00:48,445 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-21 09:00:48,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:00:48,636 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:00:48,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:00:48,636 INFO L85 PathProgramCache]: Analyzing trace with hash 1687266696, now seen corresponding path program 1 times [2022-07-21 09:00:48,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:00:48,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871068561] [2022-07-21 09:00:48,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:00:48,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:00:48,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:00:48,948 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 09:00:48,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:00:48,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871068561] [2022-07-21 09:00:48,949 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871068561] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:00:48,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333076771] [2022-07-21 09:00:48,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:00:48,950 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:00:48,950 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:00:48,952 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:00:48,957 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-21 09:00:49,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:00:49,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 33 conjunts are in the unsatisfiable core [2022-07-21 09:00:49,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:00:49,266 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-21 09:00:49,266 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 26 treesize of output 10 [2022-07-21 09:00:49,278 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 09:00:49,278 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:00:49,438 INFO L356 Elim1Store]: treesize reduction 42, result has 50.6 percent of original size [2022-07-21 09:00:49,439 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 50 [2022-07-21 09:00:49,485 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 09:00:49,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1333076771] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:00:49,486 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:00:49,486 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 14, 9] total 35 [2022-07-21 09:00:49,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508387118] [2022-07-21 09:00:49,487 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:00:49,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-07-21 09:00:49,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:00:49,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-07-21 09:00:49,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=1037, Unknown=0, NotChecked=0, Total=1190 [2022-07-21 09:00:49,492 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 246 [2022-07-21 09:00:49,495 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 248 transitions, 897 flow. Second operand has 35 states, 35 states have (on average 174.34285714285716) internal successors, (6102), 35 states have internal predecessors, (6102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:00:49,495 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:00:49,495 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 246 [2022-07-21 09:00:49,495 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:00:54,407 INFO L129 PetriNetUnfolder]: 12554/30403 cut-off events. [2022-07-21 09:00:54,407 INFO L130 PetriNetUnfolder]: For 15882/16122 co-relation queries the response was YES. [2022-07-21 09:00:54,706 INFO L84 FinitePrefix]: Finished finitePrefix Result has 63504 conditions, 30403 events. 12554/30403 cut-off events. For 15882/16122 co-relation queries the response was YES. Maximal size of possible extension queue 1108. Compared 333937 event pairs, 4425 based on Foata normal form. 37/28804 useless extension candidates. Maximal degree in co-relation 63465. Up to 5119 conditions per place. [2022-07-21 09:00:54,782 INFO L132 encePairwiseOnDemand]: 214/246 looper letters, 353 selfloop transitions, 93 changer transitions 0/624 dead transitions. [2022-07-21 09:00:54,782 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 624 transitions, 2996 flow [2022-07-21 09:00:54,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-07-21 09:00:54,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2022-07-21 09:00:54,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 6567 transitions. [2022-07-21 09:00:54,787 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7415311653116531 [2022-07-21 09:00:54,787 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 6567 transitions. [2022-07-21 09:00:54,788 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 6567 transitions. [2022-07-21 09:00:54,789 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:00:54,789 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 6567 transitions. [2022-07-21 09:00:54,795 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 182.41666666666666) internal successors, (6567), 36 states have internal predecessors, (6567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:00:54,802 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 246.0) internal successors, (9102), 37 states have internal predecessors, (9102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:00:54,803 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 246.0) internal successors, (9102), 37 states have internal predecessors, (9102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:00:54,803 INFO L186 Difference]: Start difference. First operand has 286 places, 248 transitions, 897 flow. Second operand 36 states and 6567 transitions. [2022-07-21 09:00:54,803 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 624 transitions, 2996 flow [2022-07-21 09:00:54,907 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 624 transitions, 2957 flow, removed 11 selfloop flow, removed 11 redundant places. [2022-07-21 09:00:54,913 INFO L242 Difference]: Finished difference. Result has 330 places, 325 transitions, 1588 flow [2022-07-21 09:00:54,914 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=858, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=248, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=1588, PETRI_PLACES=330, PETRI_TRANSITIONS=325} [2022-07-21 09:00:54,914 INFO L279 CegarLoopForPetriNet]: 217 programPoint places, 113 predicate places. [2022-07-21 09:00:54,914 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 325 transitions, 1588 flow [2022-07-21 09:00:54,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 174.34285714285716) internal successors, (6102), 35 states have internal predecessors, (6102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:00:54,916 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:00:54,916 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:00:54,935 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-21 09:00:55,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-07-21 09:00:55,123 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:00:55,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:00:55,124 INFO L85 PathProgramCache]: Analyzing trace with hash -387447628, now seen corresponding path program 2 times [2022-07-21 09:00:55,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:00:55,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271391660] [2022-07-21 09:00:55,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:00:55,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:00:55,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:00:55,698 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 09:00:55,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:00:55,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271391660] [2022-07-21 09:00:55,699 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271391660] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:00:55,699 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:00:55,699 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-07-21 09:00:55,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547334944] [2022-07-21 09:00:55,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:00:55,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-21 09:00:55,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:00:55,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-21 09:00:55,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2022-07-21 09:00:55,719 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 246 [2022-07-21 09:00:55,735 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 325 transitions, 1588 flow. Second operand has 20 states, 20 states have (on average 173.6) internal successors, (3472), 20 states have internal predecessors, (3472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:00:55,736 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:00:55,736 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 246 [2022-07-21 09:00:55,736 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:01:02,637 INFO L129 PetriNetUnfolder]: 15248/38698 cut-off events. [2022-07-21 09:01:02,637 INFO L130 PetriNetUnfolder]: For 77482/77997 co-relation queries the response was YES. [2022-07-21 09:01:03,211 INFO L84 FinitePrefix]: Finished finitePrefix Result has 105856 conditions, 38698 events. 15248/38698 cut-off events. For 77482/77997 co-relation queries the response was YES. Maximal size of possible extension queue 1392. Compared 455842 event pairs, 7317 based on Foata normal form. 78/37736 useless extension candidates. Maximal degree in co-relation 105797. Up to 13006 conditions per place. [2022-07-21 09:01:03,327 INFO L132 encePairwiseOnDemand]: 216/246 looper letters, 270 selfloop transitions, 122 changer transitions 0/570 dead transitions. [2022-07-21 09:01:03,327 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 570 transitions, 3750 flow [2022-07-21 09:01:03,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-21 09:01:03,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2022-07-21 09:01:03,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 4693 transitions. [2022-07-21 09:01:03,332 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.733739837398374 [2022-07-21 09:01:03,332 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 4693 transitions. [2022-07-21 09:01:03,332 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 4693 transitions. [2022-07-21 09:01:03,333 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:01:03,333 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 4693 transitions. [2022-07-21 09:01:03,337 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 180.5) internal successors, (4693), 26 states have internal predecessors, (4693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:01:03,342 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 246.0) internal successors, (6642), 27 states have internal predecessors, (6642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:01:03,343 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 246.0) internal successors, (6642), 27 states have internal predecessors, (6642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:01:03,343 INFO L186 Difference]: Start difference. First operand has 330 places, 325 transitions, 1588 flow. Second operand 26 states and 4693 transitions. [2022-07-21 09:01:03,343 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 570 transitions, 3750 flow [2022-07-21 09:01:04,050 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 570 transitions, 3719 flow, removed 2 selfloop flow, removed 8 redundant places. [2022-07-21 09:01:04,056 INFO L242 Difference]: Finished difference. Result has 360 places, 405 transitions, 2700 flow [2022-07-21 09:01:04,056 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=1557, PETRI_DIFFERENCE_MINUEND_PLACES=322, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=325, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=259, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=2700, PETRI_PLACES=360, PETRI_TRANSITIONS=405} [2022-07-21 09:01:04,057 INFO L279 CegarLoopForPetriNet]: 217 programPoint places, 143 predicate places. [2022-07-21 09:01:04,057 INFO L495 AbstractCegarLoop]: Abstraction has has 360 places, 405 transitions, 2700 flow [2022-07-21 09:01:04,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 173.6) internal successors, (3472), 20 states have internal predecessors, (3472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:01:04,057 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:01:04,058 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:01:04,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-07-21 09:01:04,058 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:01:04,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:01:04,058 INFO L85 PathProgramCache]: Analyzing trace with hash -969848734, now seen corresponding path program 3 times [2022-07-21 09:01:04,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:01:04,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396002044] [2022-07-21 09:01:04,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:01:04,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:01:04,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:01:04,462 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 09:01:04,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:01:04,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396002044] [2022-07-21 09:01:04,462 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396002044] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:01:04,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124471398] [2022-07-21 09:01:04,462 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 09:01:04,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:01:04,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:01:04,464 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:01:04,466 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-21 09:01:04,583 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-07-21 09:01:04,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 09:01:04,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 52 conjunts are in the unsatisfiable core [2022-07-21 09:01:04,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:01:05,008 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 11 treesize of output 7 [2022-07-21 09:01:05,164 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 [2022-07-21 09:01:05,215 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 [2022-07-21 09:01:05,564 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-21 09:01:05,565 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 38 treesize of output 18 [2022-07-21 09:01:05,586 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 09:01:05,586 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:01:07,044 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 09:01:07,044 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1124471398] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:01:07,044 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:01:07,045 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 27, 12] total 51 [2022-07-21 09:01:07,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168930120] [2022-07-21 09:01:07,045 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:01:07,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-07-21 09:01:07,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:01:07,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-07-21 09:01:07,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=2290, Unknown=1, NotChecked=0, Total=2550 [2022-07-21 09:01:07,051 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 246 [2022-07-21 09:01:07,055 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 360 places, 405 transitions, 2700 flow. Second operand has 51 states, 51 states have (on average 153.37254901960785) internal successors, (7822), 51 states have internal predecessors, (7822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:01:07,055 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:01:07,055 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 246 [2022-07-21 09:01:07,055 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:01:21,859 INFO L129 PetriNetUnfolder]: 27351/64136 cut-off events. [2022-07-21 09:01:21,860 INFO L130 PetriNetUnfolder]: For 188030/189408 co-relation queries the response was YES. [2022-07-21 09:01:23,299 INFO L84 FinitePrefix]: Finished finitePrefix Result has 193981 conditions, 64136 events. 27351/64136 cut-off events. For 188030/189408 co-relation queries the response was YES. Maximal size of possible extension queue 2171. Compared 765692 event pairs, 9261 based on Foata normal form. 200/62380 useless extension candidates. Maximal degree in co-relation 193909. Up to 15932 conditions per place. [2022-07-21 09:01:23,541 INFO L132 encePairwiseOnDemand]: 207/246 looper letters, 544 selfloop transitions, 178 changer transitions 0/865 dead transitions. [2022-07-21 09:01:23,541 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 403 places, 865 transitions, 7017 flow [2022-07-21 09:01:23,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-07-21 09:01:23,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2022-07-21 09:01:23,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 7077 transitions. [2022-07-21 09:01:23,550 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6538248337028825 [2022-07-21 09:01:23,550 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 7077 transitions. [2022-07-21 09:01:23,550 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 7077 transitions. [2022-07-21 09:01:23,552 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:01:23,553 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 7077 transitions. [2022-07-21 09:01:23,560 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 160.8409090909091) internal successors, (7077), 44 states have internal predecessors, (7077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:01:23,571 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 246.0) internal successors, (11070), 45 states have internal predecessors, (11070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:01:23,573 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 246.0) internal successors, (11070), 45 states have internal predecessors, (11070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:01:23,573 INFO L186 Difference]: Start difference. First operand has 360 places, 405 transitions, 2700 flow. Second operand 44 states and 7077 transitions. [2022-07-21 09:01:23,573 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 403 places, 865 transitions, 7017 flow [2022-07-21 09:01:26,485 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 395 places, 865 transitions, 6738 flow, removed 126 selfloop flow, removed 8 redundant places. [2022-07-21 09:01:26,493 INFO L242 Difference]: Finished difference. Result has 421 places, 499 transitions, 4006 flow [2022-07-21 09:01:26,494 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=2519, PETRI_DIFFERENCE_MINUEND_PLACES=352, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=405, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=299, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=4006, PETRI_PLACES=421, PETRI_TRANSITIONS=499} [2022-07-21 09:01:26,494 INFO L279 CegarLoopForPetriNet]: 217 programPoint places, 204 predicate places. [2022-07-21 09:01:26,494 INFO L495 AbstractCegarLoop]: Abstraction has has 421 places, 499 transitions, 4006 flow [2022-07-21 09:01:26,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 153.37254901960785) internal successors, (7822), 51 states have internal predecessors, (7822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:01:26,495 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:01:26,495 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:01:26,513 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-21 09:01:26,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-07-21 09:01:26,696 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:01:26,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:01:26,696 INFO L85 PathProgramCache]: Analyzing trace with hash 1645466800, now seen corresponding path program 1 times [2022-07-21 09:01:26,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:01:26,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138568958] [2022-07-21 09:01:26,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:01:26,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:01:26,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:01:26,997 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 09:01:26,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:01:26,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138568958] [2022-07-21 09:01:26,998 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138568958] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:01:26,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732813342] [2022-07-21 09:01:26,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:01:26,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:01:26,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:01:27,000 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:01:27,006 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-21 09:01:27,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:01:27,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 31 conjunts are in the unsatisfiable core [2022-07-21 09:01:27,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:01:27,234 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-21 09:01:27,235 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 26 treesize of output 10 [2022-07-21 09:01:27,248 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 09:01:27,248 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:01:27,387 INFO L356 Elim1Store]: treesize reduction 42, result has 50.6 percent of original size [2022-07-21 09:01:27,388 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 50 [2022-07-21 09:01:27,416 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 09:01:27,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1732813342] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:01:27,416 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:01:27,417 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 9, 9] total 31 [2022-07-21 09:01:27,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378709189] [2022-07-21 09:01:27,417 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:01:27,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-07-21 09:01:27,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:01:27,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-07-21 09:01:27,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=812, Unknown=0, NotChecked=0, Total=930 [2022-07-21 09:01:27,421 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 246 [2022-07-21 09:01:27,424 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 421 places, 499 transitions, 4006 flow. Second operand has 31 states, 31 states have (on average 174.1290322580645) internal successors, (5398), 31 states have internal predecessors, (5398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:01:27,424 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:01:27,424 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 246 [2022-07-21 09:01:27,424 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:01:41,058 INFO L129 PetriNetUnfolder]: 23090/57364 cut-off events. [2022-07-21 09:01:41,059 INFO L130 PetriNetUnfolder]: For 267283/269466 co-relation queries the response was YES. [2022-07-21 09:01:42,280 INFO L84 FinitePrefix]: Finished finitePrefix Result has 199124 conditions, 57364 events. 23090/57364 cut-off events. For 267283/269466 co-relation queries the response was YES. Maximal size of possible extension queue 2009. Compared 701168 event pairs, 1888 based on Foata normal form. 306/57057 useless extension candidates. Maximal degree in co-relation 199026. Up to 12202 conditions per place. [2022-07-21 09:01:42,455 INFO L132 encePairwiseOnDemand]: 216/246 looper letters, 435 selfloop transitions, 253 changer transitions 0/881 dead transitions. [2022-07-21 09:01:42,455 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 452 places, 881 transitions, 8719 flow [2022-07-21 09:01:42,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-07-21 09:01:42,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2022-07-21 09:01:42,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 5784 transitions. [2022-07-21 09:01:42,461 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7347560975609756 [2022-07-21 09:01:42,461 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 5784 transitions. [2022-07-21 09:01:42,461 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 5784 transitions. [2022-07-21 09:01:42,463 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:01:42,463 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 5784 transitions. [2022-07-21 09:01:42,468 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 180.75) internal successors, (5784), 32 states have internal predecessors, (5784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:01:42,474 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 246.0) internal successors, (8118), 33 states have internal predecessors, (8118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:01:42,475 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 246.0) internal successors, (8118), 33 states have internal predecessors, (8118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:01:42,475 INFO L186 Difference]: Start difference. First operand has 421 places, 499 transitions, 4006 flow. Second operand 32 states and 5784 transitions. [2022-07-21 09:01:42,475 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 452 places, 881 transitions, 8719 flow [2022-07-21 09:01:45,776 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 438 places, 881 transitions, 8263 flow, removed 155 selfloop flow, removed 14 redundant places. [2022-07-21 09:01:45,788 INFO L242 Difference]: Finished difference. Result has 456 places, 611 transitions, 6006 flow [2022-07-21 09:01:45,789 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=3727, PETRI_DIFFERENCE_MINUEND_PLACES=407, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=499, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=334, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=6006, PETRI_PLACES=456, PETRI_TRANSITIONS=611} [2022-07-21 09:01:45,790 INFO L279 CegarLoopForPetriNet]: 217 programPoint places, 239 predicate places. [2022-07-21 09:01:45,790 INFO L495 AbstractCegarLoop]: Abstraction has has 456 places, 611 transitions, 6006 flow [2022-07-21 09:01:45,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 174.1290322580645) internal successors, (5398), 31 states have internal predecessors, (5398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:01:45,791 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:01:45,791 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:01:45,815 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-21 09:01:46,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-07-21 09:01:46,009 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 09:01:46,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:01:46,010 INFO L85 PathProgramCache]: Analyzing trace with hash -773726006, now seen corresponding path program 2 times [2022-07-21 09:01:46,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:01:46,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172941904] [2022-07-21 09:01:46,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:01:46,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:01:46,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:01:46,283 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 09:01:46,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:01:46,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172941904] [2022-07-21 09:01:46,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172941904] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:01:46,283 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:01:46,283 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-07-21 09:01:46,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534240114] [2022-07-21 09:01:46,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:01:46,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-21 09:01:46,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:01:46,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-21 09:01:46,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2022-07-21 09:01:46,286 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 246 [2022-07-21 09:01:46,288 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 456 places, 611 transitions, 6006 flow. Second operand has 20 states, 20 states have (on average 173.6) internal successors, (3472), 20 states have internal predecessors, (3472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:01:46,288 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:01:46,288 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 246 [2022-07-21 09:01:46,288 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand