./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 6c24879c 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-?-6c24879 [2022-07-12 10:25:42,293 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-12 10:25:42,295 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-12 10:25:42,326 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-12 10:25:42,327 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-12 10:25:42,328 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-12 10:25:42,329 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-12 10:25:42,330 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-12 10:25:42,332 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-12 10:25:42,335 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-12 10:25:42,336 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-12 10:25:42,337 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-12 10:25:42,337 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-12 10:25:42,338 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-12 10:25:42,339 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-12 10:25:42,341 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-12 10:25:42,342 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-12 10:25:42,343 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-12 10:25:42,344 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-12 10:25:42,348 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-12 10:25:42,349 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-12 10:25:42,350 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-12 10:25:42,350 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-12 10:25:42,351 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-12 10:25:42,352 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-12 10:25:42,357 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-12 10:25:42,357 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-12 10:25:42,357 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-12 10:25:42,358 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-12 10:25:42,358 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-12 10:25:42,359 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-12 10:25:42,359 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-12 10:25:42,360 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-12 10:25:42,361 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-12 10:25:42,361 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-12 10:25:42,362 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-12 10:25:42,362 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-12 10:25:42,362 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-12 10:25:42,362 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-12 10:25:42,363 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-12 10:25:42,364 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-12 10:25:42,365 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-12 10:25:42,366 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-12 10:25:42,388 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-12 10:25:42,388 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-12 10:25:42,389 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-12 10:25:42,389 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-12 10:25:42,389 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-12 10:25:42,389 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-12 10:25:42,390 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-12 10:25:42,390 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-12 10:25:42,390 INFO L138 SettingsManager]: * Use SBE=true [2022-07-12 10:25:42,391 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-12 10:25:42,391 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-12 10:25:42,391 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-12 10:25:42,391 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-12 10:25:42,391 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-12 10:25:42,391 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-12 10:25:42,392 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-12 10:25:42,392 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-12 10:25:42,392 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-12 10:25:42,392 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-12 10:25:42,393 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-12 10:25:42,393 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-12 10:25:42,393 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-12 10:25:42,393 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-12 10:25:42,393 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-12 10:25:42,394 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 10:25:42,394 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-12 10:25:42,394 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-12 10:25:42,394 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-12 10:25:42,394 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-12 10:25:42,394 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-12 10:25:42,394 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-12 10:25:42,395 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-12 10:25:42,395 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-12 10:25:42,395 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4ca4c99e545bc332635ee8b9969d24118d6fd539f8535aa6ae4c72d296ec330e [2022-07-12 10:25:42,560 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-12 10:25:42,574 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-12 10:25:42,576 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-12 10:25:42,577 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-12 10:25:42,577 INFO L275 PluginConnector]: CDTParser initialized [2022-07-12 10:25:42,578 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/chl-word-symm.wvr.c [2022-07-12 10:25:42,624 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/88ab01858/b17a22d1de504502923f5dbc8bc18426/FLAG1bd86019d [2022-07-12 10:25:42,992 INFO L306 CDTParser]: Found 1 translation units. [2022-07-12 10:25:42,992 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-word-symm.wvr.c [2022-07-12 10:25:42,998 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/88ab01858/b17a22d1de504502923f5dbc8bc18426/FLAG1bd86019d [2022-07-12 10:25:43,013 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/88ab01858/b17a22d1de504502923f5dbc8bc18426 [2022-07-12 10:25:43,014 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-12 10:25:43,016 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-12 10:25:43,018 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-12 10:25:43,018 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-12 10:25:43,021 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-12 10:25:43,021 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 10:25:43" (1/1) ... [2022-07-12 10:25:43,022 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@24de4af1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:25:43, skipping insertion in model container [2022-07-12 10:25:43,022 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 10:25:43" (1/1) ... [2022-07-12 10:25:43,027 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-12 10:25:43,043 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-12 10:25:43,186 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] [2022-07-12 10:25:43,190 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 10:25:43,195 INFO L203 MainTranslator]: Completed pre-run [2022-07-12 10:25:43,218 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] [2022-07-12 10:25:43,226 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 10:25:43,237 INFO L208 MainTranslator]: Completed translation [2022-07-12 10:25:43,238 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:25:43 WrapperNode [2022-07-12 10:25:43,238 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-12 10:25:43,239 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-12 10:25:43,239 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-12 10:25:43,240 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-12 10:25:43,244 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:25:43" (1/1) ... [2022-07-12 10:25:43,257 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:25:43" (1/1) ... [2022-07-12 10:25:43,278 INFO L137 Inliner]: procedures = 24, calls = 35, calls flagged for inlining = 9, calls inlined = 11, statements flattened = 128 [2022-07-12 10:25:43,279 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-12 10:25:43,280 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-12 10:25:43,280 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-12 10:25:43,280 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-12 10:25:43,285 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:25:43" (1/1) ... [2022-07-12 10:25:43,285 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:25:43" (1/1) ... [2022-07-12 10:25:43,296 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:25:43" (1/1) ... [2022-07-12 10:25:43,296 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:25:43" (1/1) ... [2022-07-12 10:25:43,304 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:25:43" (1/1) ... [2022-07-12 10:25:43,311 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:25:43" (1/1) ... [2022-07-12 10:25:43,315 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:25:43" (1/1) ... [2022-07-12 10:25:43,317 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-12 10:25:43,322 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-12 10:25:43,322 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-12 10:25:43,322 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-12 10:25:43,323 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:25:43" (1/1) ... [2022-07-12 10:25:43,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 10:25:43,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:25:43,359 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) [2022-07-12 10:25:43,371 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 [2022-07-12 10:25:43,385 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-12 10:25:43,385 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-07-12 10:25:43,385 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-07-12 10:25:43,385 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-07-12 10:25:43,385 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-07-12 10:25:43,385 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-12 10:25:43,386 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-12 10:25:43,386 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-12 10:25:43,386 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-12 10:25:43,386 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-12 10:25:43,386 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-12 10:25:43,386 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-12 10:25:43,386 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-12 10:25:43,387 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-12 10:25:43,449 INFO L234 CfgBuilder]: Building ICFG [2022-07-12 10:25:43,460 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-12 10:25:43,811 INFO L275 CfgBuilder]: Performing block encoding [2022-07-12 10:25:43,818 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-12 10:25:43,818 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2022-07-12 10:25:43,820 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 10:25:43 BoogieIcfgContainer [2022-07-12 10:25:43,820 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-12 10:25:43,821 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-12 10:25:43,821 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-12 10:25:43,827 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-12 10:25:43,827 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.07 10:25:43" (1/3) ... [2022-07-12 10:25:43,828 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13146820 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 10:25:43, skipping insertion in model container [2022-07-12 10:25:43,828 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:25:43" (2/3) ... [2022-07-12 10:25:43,828 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13146820 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 10:25:43, skipping insertion in model container [2022-07-12 10:25:43,829 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 10:25:43" (3/3) ... [2022-07-12 10:25:43,829 INFO L111 eAbstractionObserver]: Analyzing ICFG chl-word-symm.wvr.c [2022-07-12 10:25:43,833 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-12 10:25:43,839 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-12 10:25:43,839 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-12 10:25:43,839 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-12 10:25:43,885 INFO L135 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-07-12 10:25:43,910 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 228 places, 246 transitions, 508 flow [2022-07-12 10:25:44,006 INFO L129 PetriNetUnfolder]: 25/244 cut-off events. [2022-07-12 10:25:44,006 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-12 10:25:44,011 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. [2022-07-12 10:25:44,014 INFO L82 GeneralOperation]: Start removeDead. Operand has 228 places, 246 transitions, 508 flow [2022-07-12 10:25:44,019 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 217 places, 235 transitions, 482 flow [2022-07-12 10:25:44,025 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 10:25:44,030 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@32f80d7b, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@5e5a2693 [2022-07-12 10:25:44,030 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-07-12 10:25:44,055 INFO L129 PetriNetUnfolder]: 25/234 cut-off events. [2022-07-12 10:25:44,055 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-12 10:25:44,056 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:25:44,056 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] [2022-07-12 10:25:44,057 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:25:44,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:25:44,060 INFO L85 PathProgramCache]: Analyzing trace with hash 1778435912, now seen corresponding path program 1 times [2022-07-12 10:25:44,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:25:44,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417750272] [2022-07-12 10:25:44,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:25:44,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:25:44,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:25:44,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:25:44,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:25:44,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417750272] [2022-07-12 10:25:44,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417750272] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:25:44,272 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:25:44,272 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 10:25:44,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944067256] [2022-07-12 10:25:44,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:25:44,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-12 10:25:44,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:25:44,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-12 10:25:44,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-12 10:25:44,310 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 230 out of 246 [2022-07-12 10:25:44,317 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) [2022-07-12 10:25:44,317 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:25:44,317 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 230 of 246 [2022-07-12 10:25:44,318 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:25:44,377 INFO L129 PetriNetUnfolder]: 14/224 cut-off events. [2022-07-12 10:25:44,377 INFO L130 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2022-07-12 10:25:44,379 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. [2022-07-12 10:25:44,381 INFO L132 encePairwiseOnDemand]: 235/246 looper letters, 4 selfloop transitions, 0 changer transitions 7/224 dead transitions. [2022-07-12 10:25:44,381 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 224 transitions, 468 flow [2022-07-12 10:25:44,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-12 10:25:44,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-12 10:25:44,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 475 transitions. [2022-07-12 10:25:44,400 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9654471544715447 [2022-07-12 10:25:44,401 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 475 transitions. [2022-07-12 10:25:44,401 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 475 transitions. [2022-07-12 10:25:44,415 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:25:44,417 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 475 transitions. [2022-07-12 10:25:44,421 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) [2022-07-12 10:25:44,426 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) [2022-07-12 10:25:44,427 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) [2022-07-12 10:25:44,428 INFO L186 Difference]: Start difference. First operand has 217 places, 235 transitions, 482 flow. Second operand 2 states and 475 transitions. [2022-07-12 10:25:44,429 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 224 transitions, 468 flow [2022-07-12 10:25:44,432 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 224 transitions, 460 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-07-12 10:25:44,436 INFO L242 Difference]: Finished difference. Result has 214 places, 217 transitions, 438 flow [2022-07-12 10:25:44,437 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} [2022-07-12 10:25:44,440 INFO L279 CegarLoopForPetriNet]: 217 programPoint places, -3 predicate places. [2022-07-12 10:25:44,440 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 217 transitions, 438 flow [2022-07-12 10:25:44,441 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) [2022-07-12 10:25:44,441 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:25:44,441 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] [2022-07-12 10:25:44,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-12 10:25:44,442 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:25:44,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:25:44,443 INFO L85 PathProgramCache]: Analyzing trace with hash 1021980779, now seen corresponding path program 1 times [2022-07-12 10:25:44,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:25:44,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676939485] [2022-07-12 10:25:44,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:25:44,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:25:44,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:25:44,635 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:25:44,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:25:44,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676939485] [2022-07-12 10:25:44,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676939485] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:25:44,635 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:25:44,636 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 10:25:44,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776858940] [2022-07-12 10:25:44,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:25:44,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 10:25:44,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:25:44,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 10:25:44,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 10:25:44,638 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 226 out of 246 [2022-07-12 10:25:44,639 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) [2022-07-12 10:25:44,639 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:25:44,639 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 226 of 246 [2022-07-12 10:25:44,639 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:25:44,691 INFO L129 PetriNetUnfolder]: 26/304 cut-off events. [2022-07-12 10:25:44,692 INFO L130 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2022-07-12 10:25:44,693 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. [2022-07-12 10:25:44,694 INFO L132 encePairwiseOnDemand]: 243/246 looper letters, 10 selfloop transitions, 2 changer transitions 0/221 dead transitions. [2022-07-12 10:25:44,694 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 221 transitions, 473 flow [2022-07-12 10:25:44,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 10:25:44,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-12 10:25:44,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 691 transitions. [2022-07-12 10:25:44,696 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9363143631436315 [2022-07-12 10:25:44,696 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 691 transitions. [2022-07-12 10:25:44,696 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 691 transitions. [2022-07-12 10:25:44,696 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:25:44,697 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 691 transitions. [2022-07-12 10:25:44,698 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) [2022-07-12 10:25:44,700 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) [2022-07-12 10:25:44,701 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) [2022-07-12 10:25:44,701 INFO L186 Difference]: Start difference. First operand has 214 places, 217 transitions, 438 flow. Second operand 3 states and 691 transitions. [2022-07-12 10:25:44,701 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 221 transitions, 473 flow [2022-07-12 10:25:44,704 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 221 transitions, 473 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-12 10:25:44,710 INFO L242 Difference]: Finished difference. Result has 210 places, 217 transitions, 446 flow [2022-07-12 10:25:44,710 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} [2022-07-12 10:25:44,711 INFO L279 CegarLoopForPetriNet]: 217 programPoint places, -7 predicate places. [2022-07-12 10:25:44,711 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 217 transitions, 446 flow [2022-07-12 10:25:44,712 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) [2022-07-12 10:25:44,712 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:25:44,712 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] [2022-07-12 10:25:44,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-12 10:25:44,713 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:25:44,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:25:44,715 INFO L85 PathProgramCache]: Analyzing trace with hash -107466911, now seen corresponding path program 1 times [2022-07-12 10:25:44,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:25:44,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186599985] [2022-07-12 10:25:44,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:25:44,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:25:44,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:25:44,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:25:44,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:25:44,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186599985] [2022-07-12 10:25:44,809 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186599985] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:25:44,809 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:25:44,809 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 10:25:44,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535493815] [2022-07-12 10:25:44,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:25:44,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 10:25:44,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:25:44,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 10:25:44,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 10:25:44,811 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 218 out of 246 [2022-07-12 10:25:44,812 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) [2022-07-12 10:25:44,812 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:25:44,812 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 218 of 246 [2022-07-12 10:25:44,812 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:25:44,867 INFO L129 PetriNetUnfolder]: 53/486 cut-off events. [2022-07-12 10:25:44,868 INFO L130 PetriNetUnfolder]: For 21/21 co-relation queries the response was YES. [2022-07-12 10:25:44,869 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. [2022-07-12 10:25:44,870 INFO L132 encePairwiseOnDemand]: 242/246 looper letters, 19 selfloop transitions, 2 changer transitions 0/222 dead transitions. [2022-07-12 10:25:44,870 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 222 transitions, 501 flow [2022-07-12 10:25:44,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 10:25:44,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-12 10:25:44,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 677 transitions. [2022-07-12 10:25:44,873 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9173441734417345 [2022-07-12 10:25:44,873 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 677 transitions. [2022-07-12 10:25:44,873 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 677 transitions. [2022-07-12 10:25:44,873 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:25:44,874 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 677 transitions. [2022-07-12 10:25:44,876 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) [2022-07-12 10:25:44,877 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) [2022-07-12 10:25:44,877 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) [2022-07-12 10:25:44,878 INFO L186 Difference]: Start difference. First operand has 210 places, 217 transitions, 446 flow. Second operand 3 states and 677 transitions. [2022-07-12 10:25:44,878 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 222 transitions, 501 flow [2022-07-12 10:25:44,879 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 222 transitions, 497 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-07-12 10:25:44,881 INFO L242 Difference]: Finished difference. Result has 212 places, 219 transitions, 462 flow [2022-07-12 10:25:44,881 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} [2022-07-12 10:25:44,883 INFO L279 CegarLoopForPetriNet]: 217 programPoint places, -5 predicate places. [2022-07-12 10:25:44,883 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 219 transitions, 462 flow [2022-07-12 10:25:44,883 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) [2022-07-12 10:25:44,883 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:25:44,883 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] [2022-07-12 10:25:44,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-12 10:25:44,884 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:25:44,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:25:44,885 INFO L85 PathProgramCache]: Analyzing trace with hash -18316489, now seen corresponding path program 2 times [2022-07-12 10:25:44,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:25:44,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877065917] [2022-07-12 10:25:44,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:25:44,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:25:44,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:25:44,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:25:44,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:25:44,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877065917] [2022-07-12 10:25:44,978 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877065917] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:25:44,978 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:25:44,978 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 10:25:44,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95503705] [2022-07-12 10:25:44,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:25:44,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 10:25:44,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:25:44,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 10:25:44,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 10:25:44,980 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 218 out of 246 [2022-07-12 10:25:44,981 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) [2022-07-12 10:25:44,981 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:25:44,981 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 218 of 246 [2022-07-12 10:25:44,982 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:25:45,037 INFO L129 PetriNetUnfolder]: 47/435 cut-off events. [2022-07-12 10:25:45,038 INFO L130 PetriNetUnfolder]: For 41/42 co-relation queries the response was YES. [2022-07-12 10:25:45,038 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. [2022-07-12 10:25:45,039 INFO L132 encePairwiseOnDemand]: 242/246 looper letters, 21 selfloop transitions, 2 changer transitions 0/224 dead transitions. [2022-07-12 10:25:45,040 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 224 transitions, 525 flow [2022-07-12 10:25:45,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 10:25:45,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-12 10:25:45,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 677 transitions. [2022-07-12 10:25:45,042 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9173441734417345 [2022-07-12 10:25:45,042 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 677 transitions. [2022-07-12 10:25:45,042 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 677 transitions. [2022-07-12 10:25:45,043 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:25:45,043 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 677 transitions. [2022-07-12 10:25:45,044 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) [2022-07-12 10:25:45,046 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) [2022-07-12 10:25:45,048 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) [2022-07-12 10:25:45,048 INFO L186 Difference]: Start difference. First operand has 212 places, 219 transitions, 462 flow. Second operand 3 states and 677 transitions. [2022-07-12 10:25:45,048 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 224 transitions, 525 flow [2022-07-12 10:25:45,050 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 224 transitions, 523 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-12 10:25:45,052 INFO L242 Difference]: Finished difference. Result has 215 places, 221 transitions, 484 flow [2022-07-12 10:25:45,052 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} [2022-07-12 10:25:45,053 INFO L279 CegarLoopForPetriNet]: 217 programPoint places, -2 predicate places. [2022-07-12 10:25:45,053 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 221 transitions, 484 flow [2022-07-12 10:25:45,054 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) [2022-07-12 10:25:45,057 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:25:45,057 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] [2022-07-12 10:25:45,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-12 10:25:45,058 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:25:45,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:25:45,059 INFO L85 PathProgramCache]: Analyzing trace with hash 1122073423, now seen corresponding path program 1 times [2022-07-12 10:25:45,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:25:45,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376477959] [2022-07-12 10:25:45,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:25:45,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:25:45,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:25:45,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:25:45,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:25:45,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376477959] [2022-07-12 10:25:45,142 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376477959] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:25:45,142 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:25:45,142 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 10:25:45,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803002278] [2022-07-12 10:25:45,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:25:45,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 10:25:45,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:25:45,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 10:25:45,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 10:25:45,145 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 226 out of 246 [2022-07-12 10:25:45,146 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) [2022-07-12 10:25:45,146 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:25:45,146 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 226 of 246 [2022-07-12 10:25:45,146 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:25:45,185 INFO L129 PetriNetUnfolder]: 29/404 cut-off events. [2022-07-12 10:25:45,185 INFO L130 PetriNetUnfolder]: For 30/38 co-relation queries the response was YES. [2022-07-12 10:25:45,186 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. [2022-07-12 10:25:45,187 INFO L132 encePairwiseOnDemand]: 243/246 looper letters, 9 selfloop transitions, 2 changer transitions 0/224 dead transitions. [2022-07-12 10:25:45,187 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 224 transitions, 514 flow [2022-07-12 10:25:45,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 10:25:45,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-12 10:25:45,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 690 transitions. [2022-07-12 10:25:45,188 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9349593495934959 [2022-07-12 10:25:45,188 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 690 transitions. [2022-07-12 10:25:45,189 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 690 transitions. [2022-07-12 10:25:45,189 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:25:45,189 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 690 transitions. [2022-07-12 10:25:45,190 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) [2022-07-12 10:25:45,191 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) [2022-07-12 10:25:45,192 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) [2022-07-12 10:25:45,192 INFO L186 Difference]: Start difference. First operand has 215 places, 221 transitions, 484 flow. Second operand 3 states and 690 transitions. [2022-07-12 10:25:45,192 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 224 transitions, 514 flow [2022-07-12 10:25:45,194 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 224 transitions, 508 flow, removed 2 selfloop flow, removed 1 redundant places. [2022-07-12 10:25:45,196 INFO L242 Difference]: Finished difference. Result has 217 places, 221 transitions, 486 flow [2022-07-12 10:25:45,197 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} [2022-07-12 10:25:45,198 INFO L279 CegarLoopForPetriNet]: 217 programPoint places, 0 predicate places. [2022-07-12 10:25:45,199 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 221 transitions, 486 flow [2022-07-12 10:25:45,199 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) [2022-07-12 10:25:45,199 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:25:45,200 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] [2022-07-12 10:25:45,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-12 10:25:45,200 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:25:45,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:25:45,201 INFO L85 PathProgramCache]: Analyzing trace with hash -1694836665, now seen corresponding path program 1 times [2022-07-12 10:25:45,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:25:45,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532209688] [2022-07-12 10:25:45,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:25:45,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:25:45,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:25:45,381 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:25:45,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:25:45,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532209688] [2022-07-12 10:25:45,382 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532209688] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:25:45,382 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:25:45,382 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-12 10:25:45,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388710600] [2022-07-12 10:25:45,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:25:45,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-12 10:25:45,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:25:45,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-12 10:25:45,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-07-12 10:25:45,386 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 246 [2022-07-12 10:25:45,388 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) [2022-07-12 10:25:45,388 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:25:45,388 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 246 [2022-07-12 10:25:45,388 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:25:45,622 INFO L129 PetriNetUnfolder]: 74/629 cut-off events. [2022-07-12 10:25:45,623 INFO L130 PetriNetUnfolder]: For 33/36 co-relation queries the response was YES. [2022-07-12 10:25:45,624 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. [2022-07-12 10:25:45,628 INFO L132 encePairwiseOnDemand]: 237/246 looper letters, 71 selfloop transitions, 3 changer transitions 15/264 dead transitions. [2022-07-12 10:25:45,628 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 264 transitions, 757 flow [2022-07-12 10:25:45,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-12 10:25:45,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-07-12 10:25:45,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2443 transitions. [2022-07-12 10:25:45,632 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7639149468417761 [2022-07-12 10:25:45,632 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2443 transitions. [2022-07-12 10:25:45,632 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2443 transitions. [2022-07-12 10:25:45,633 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:25:45,633 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2443 transitions. [2022-07-12 10:25:45,637 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) [2022-07-12 10:25:45,640 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) [2022-07-12 10:25:45,641 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) [2022-07-12 10:25:45,641 INFO L186 Difference]: Start difference. First operand has 217 places, 221 transitions, 486 flow. Second operand 13 states and 2443 transitions. [2022-07-12 10:25:45,641 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 264 transitions, 757 flow [2022-07-12 10:25:45,644 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 264 transitions, 753 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-07-12 10:25:45,646 INFO L242 Difference]: Finished difference. Result has 238 places, 223 transitions, 525 flow [2022-07-12 10:25:45,646 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} [2022-07-12 10:25:45,648 INFO L279 CegarLoopForPetriNet]: 217 programPoint places, 21 predicate places. [2022-07-12 10:25:45,648 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 223 transitions, 525 flow [2022-07-12 10:25:45,649 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) [2022-07-12 10:25:45,649 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:25:45,649 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] [2022-07-12 10:25:45,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-12 10:25:45,649 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:25:45,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:25:45,650 INFO L85 PathProgramCache]: Analyzing trace with hash 1194393457, now seen corresponding path program 2 times [2022-07-12 10:25:45,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:25:45,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179876064] [2022-07-12 10:25:45,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:25:45,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:25:45,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:25:45,790 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:25:45,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:25:45,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179876064] [2022-07-12 10:25:45,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179876064] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:25:45,793 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:25:45,793 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-12 10:25:45,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189725150] [2022-07-12 10:25:45,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:25:45,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-12 10:25:45,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:25:45,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-12 10:25:45,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-07-12 10:25:45,799 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 246 [2022-07-12 10:25:45,800 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) [2022-07-12 10:25:45,801 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:25:45,801 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 246 [2022-07-12 10:25:45,801 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:25:45,972 INFO L129 PetriNetUnfolder]: 92/755 cut-off events. [2022-07-12 10:25:45,972 INFO L130 PetriNetUnfolder]: For 255/258 co-relation queries the response was YES. [2022-07-12 10:25:45,974 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. [2022-07-12 10:25:45,975 INFO L132 encePairwiseOnDemand]: 237/246 looper letters, 80 selfloop transitions, 3 changer transitions 16/274 dead transitions. [2022-07-12 10:25:45,976 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 274 transitions, 943 flow [2022-07-12 10:25:45,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-12 10:25:45,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-07-12 10:25:45,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2445 transitions. [2022-07-12 10:25:45,980 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7645403377110694 [2022-07-12 10:25:45,980 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2445 transitions. [2022-07-12 10:25:45,980 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2445 transitions. [2022-07-12 10:25:45,981 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:25:45,981 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2445 transitions. [2022-07-12 10:25:45,985 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) [2022-07-12 10:25:45,989 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) [2022-07-12 10:25:45,990 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) [2022-07-12 10:25:45,990 INFO L186 Difference]: Start difference. First operand has 238 places, 223 transitions, 525 flow. Second operand 13 states and 2445 transitions. [2022-07-12 10:25:45,990 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 274 transitions, 943 flow [2022-07-12 10:25:45,995 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 274 transitions, 901 flow, removed 19 selfloop flow, removed 7 redundant places. [2022-07-12 10:25:45,998 INFO L242 Difference]: Finished difference. Result has 246 places, 225 transitions, 559 flow [2022-07-12 10:25:45,998 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} [2022-07-12 10:25:45,999 INFO L279 CegarLoopForPetriNet]: 217 programPoint places, 29 predicate places. [2022-07-12 10:25:45,999 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 225 transitions, 559 flow [2022-07-12 10:25:45,999 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) [2022-07-12 10:25:46,000 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:25:46,000 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] [2022-07-12 10:25:46,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-12 10:25:46,000 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:25:46,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:25:46,001 INFO L85 PathProgramCache]: Analyzing trace with hash -877867671, now seen corresponding path program 3 times [2022-07-12 10:25:46,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:25:46,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231072708] [2022-07-12 10:25:46,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:25:46,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:25:46,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:25:46,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:25:46,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:25:46,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231072708] [2022-07-12 10:25:46,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231072708] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:25:46,097 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:25:46,098 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-12 10:25:46,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695371329] [2022-07-12 10:25:46,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:25:46,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-12 10:25:46,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:25:46,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-12 10:25:46,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-07-12 10:25:46,100 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 246 [2022-07-12 10:25:46,101 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) [2022-07-12 10:25:46,101 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:25:46,102 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 246 [2022-07-12 10:25:46,102 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:25:46,286 INFO L129 PetriNetUnfolder]: 91/757 cut-off events. [2022-07-12 10:25:46,286 INFO L130 PetriNetUnfolder]: For 509/513 co-relation queries the response was YES. [2022-07-12 10:25:46,288 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. [2022-07-12 10:25:46,290 INFO L132 encePairwiseOnDemand]: 237/246 looper letters, 55 selfloop transitions, 8 changer transitions 12/250 dead transitions. [2022-07-12 10:25:46,290 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 250 transitions, 880 flow [2022-07-12 10:25:46,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-12 10:25:46,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-07-12 10:25:46,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2244 transitions. [2022-07-12 10:25:46,293 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7601626016260162 [2022-07-12 10:25:46,293 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2244 transitions. [2022-07-12 10:25:46,293 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2244 transitions. [2022-07-12 10:25:46,294 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:25:46,294 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2244 transitions. [2022-07-12 10:25:46,297 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) [2022-07-12 10:25:46,300 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) [2022-07-12 10:25:46,301 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) [2022-07-12 10:25:46,301 INFO L186 Difference]: Start difference. First operand has 246 places, 225 transitions, 559 flow. Second operand 12 states and 2244 transitions. [2022-07-12 10:25:46,301 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 250 transitions, 880 flow [2022-07-12 10:25:46,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 250 transitions, 852 flow, removed 13 selfloop flow, removed 7 redundant places. [2022-07-12 10:25:46,306 INFO L242 Difference]: Finished difference. Result has 249 places, 232 transitions, 649 flow [2022-07-12 10:25:46,307 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} [2022-07-12 10:25:46,307 INFO L279 CegarLoopForPetriNet]: 217 programPoint places, 32 predicate places. [2022-07-12 10:25:46,307 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 232 transitions, 649 flow [2022-07-12 10:25:46,308 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) [2022-07-12 10:25:46,308 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:25:46,308 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] [2022-07-12 10:25:46,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-12 10:25:46,308 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:25:46,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:25:46,308 INFO L85 PathProgramCache]: Analyzing trace with hash -1920098823, now seen corresponding path program 4 times [2022-07-12 10:25:46,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:25:46,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775234319] [2022-07-12 10:25:46,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:25:46,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:25:46,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:25:46,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:25:46,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:25:46,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775234319] [2022-07-12 10:25:46,393 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775234319] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:25:46,393 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:25:46,394 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-12 10:25:46,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341022318] [2022-07-12 10:25:46,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:25:46,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-12 10:25:46,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:25:46,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-12 10:25:46,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-07-12 10:25:46,396 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 246 [2022-07-12 10:25:46,398 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) [2022-07-12 10:25:46,398 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:25:46,398 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 246 [2022-07-12 10:25:46,398 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:25:46,609 INFO L129 PetriNetUnfolder]: 89/764 cut-off events. [2022-07-12 10:25:46,610 INFO L130 PetriNetUnfolder]: For 646/656 co-relation queries the response was YES. [2022-07-12 10:25:46,612 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. [2022-07-12 10:25:46,614 INFO L132 encePairwiseOnDemand]: 237/246 looper letters, 55 selfloop transitions, 12 changer transitions 11/253 dead transitions. [2022-07-12 10:25:46,614 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 253 transitions, 968 flow [2022-07-12 10:25:46,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-12 10:25:46,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-07-12 10:25:46,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2062 transitions. [2022-07-12 10:25:46,617 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.762010347376201 [2022-07-12 10:25:46,617 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2062 transitions. [2022-07-12 10:25:46,617 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2062 transitions. [2022-07-12 10:25:46,618 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:25:46,631 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2062 transitions. [2022-07-12 10:25:46,634 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) [2022-07-12 10:25:46,637 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) [2022-07-12 10:25:46,638 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) [2022-07-12 10:25:46,638 INFO L186 Difference]: Start difference. First operand has 249 places, 232 transitions, 649 flow. Second operand 11 states and 2062 transitions. [2022-07-12 10:25:46,638 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 253 transitions, 968 flow [2022-07-12 10:25:46,641 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 253 transitions, 946 flow, removed 11 selfloop flow, removed 3 redundant places. [2022-07-12 10:25:46,644 INFO L242 Difference]: Finished difference. Result has 258 places, 237 transitions, 740 flow [2022-07-12 10:25:46,659 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} [2022-07-12 10:25:46,660 INFO L279 CegarLoopForPetriNet]: 217 programPoint places, 41 predicate places. [2022-07-12 10:25:46,660 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 237 transitions, 740 flow [2022-07-12 10:25:46,661 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) [2022-07-12 10:25:46,661 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:25:46,661 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] [2022-07-12 10:25:46,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-12 10:25:46,662 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:25:46,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:25:46,662 INFO L85 PathProgramCache]: Analyzing trace with hash 1824923961, now seen corresponding path program 1 times [2022-07-12 10:25:46,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:25:46,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139276508] [2022-07-12 10:25:46,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:25:46,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:25:46,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:25:46,705 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:25:46,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:25:46,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139276508] [2022-07-12 10:25:46,708 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139276508] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:25:46,708 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:25:46,709 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-12 10:25:46,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763326236] [2022-07-12 10:25:46,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:25:46,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 10:25:46,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:25:46,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 10:25:46,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-12 10:25:46,712 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 218 out of 246 [2022-07-12 10:25:46,718 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) [2022-07-12 10:25:46,722 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:25:46,722 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 218 of 246 [2022-07-12 10:25:46,722 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:25:46,857 INFO L129 PetriNetUnfolder]: 53/687 cut-off events. [2022-07-12 10:25:46,857 INFO L130 PetriNetUnfolder]: For 642/645 co-relation queries the response was YES. [2022-07-12 10:25:46,858 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. [2022-07-12 10:25:46,860 INFO L132 encePairwiseOnDemand]: 240/246 looper letters, 26 selfloop transitions, 4 changer transitions 0/247 dead transitions. [2022-07-12 10:25:46,860 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 247 transitions, 830 flow [2022-07-12 10:25:46,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-12 10:25:46,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-07-12 10:25:46,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 902 transitions. [2022-07-12 10:25:46,862 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9166666666666666 [2022-07-12 10:25:46,863 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 902 transitions. [2022-07-12 10:25:46,863 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 902 transitions. [2022-07-12 10:25:46,863 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:25:46,863 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 902 transitions. [2022-07-12 10:25:46,865 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) [2022-07-12 10:25:46,866 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) [2022-07-12 10:25:46,866 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) [2022-07-12 10:25:46,866 INFO L186 Difference]: Start difference. First operand has 258 places, 237 transitions, 740 flow. Second operand 4 states and 902 transitions. [2022-07-12 10:25:46,866 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 247 transitions, 830 flow [2022-07-12 10:25:46,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 247 transitions, 793 flow, removed 14 selfloop flow, removed 5 redundant places. [2022-07-12 10:25:46,873 INFO L242 Difference]: Finished difference. Result has 253 places, 239 transitions, 729 flow [2022-07-12 10:25:46,874 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} [2022-07-12 10:25:46,874 INFO L279 CegarLoopForPetriNet]: 217 programPoint places, 36 predicate places. [2022-07-12 10:25:46,874 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 239 transitions, 729 flow [2022-07-12 10:25:46,875 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) [2022-07-12 10:25:46,875 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:25:46,875 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] [2022-07-12 10:25:46,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-12 10:25:46,876 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:25:46,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:25:46,876 INFO L85 PathProgramCache]: Analyzing trace with hash 1129283707, now seen corresponding path program 1 times [2022-07-12 10:25:46,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:25:46,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539321233] [2022-07-12 10:25:46,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:25:46,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:25:46,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:25:46,907 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:25:46,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:25:46,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539321233] [2022-07-12 10:25:46,908 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539321233] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:25:46,908 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:25:46,908 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 10:25:46,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631122899] [2022-07-12 10:25:46,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:25:46,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 10:25:46,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:25:46,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 10:25:46,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 10:25:46,910 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 218 out of 246 [2022-07-12 10:25:46,911 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) [2022-07-12 10:25:46,911 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:25:46,911 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 218 of 246 [2022-07-12 10:25:46,911 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:25:46,969 INFO L129 PetriNetUnfolder]: 48/646 cut-off events. [2022-07-12 10:25:46,970 INFO L130 PetriNetUnfolder]: For 500/514 co-relation queries the response was YES. [2022-07-12 10:25:46,971 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. [2022-07-12 10:25:46,973 INFO L132 encePairwiseOnDemand]: 244/246 looper letters, 26 selfloop transitions, 1 changer transitions 0/244 dead transitions. [2022-07-12 10:25:46,973 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 244 transitions, 800 flow [2022-07-12 10:25:46,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 10:25:46,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-12 10:25:46,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 676 transitions. [2022-07-12 10:25:46,975 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9159891598915989 [2022-07-12 10:25:46,975 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 676 transitions. [2022-07-12 10:25:46,975 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 676 transitions. [2022-07-12 10:25:46,976 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:25:46,976 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 676 transitions. [2022-07-12 10:25:46,977 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) [2022-07-12 10:25:46,978 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) [2022-07-12 10:25:46,978 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) [2022-07-12 10:25:46,978 INFO L186 Difference]: Start difference. First operand has 253 places, 239 transitions, 729 flow. Second operand 3 states and 676 transitions. [2022-07-12 10:25:46,978 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 244 transitions, 800 flow [2022-07-12 10:25:46,982 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 244 transitions, 790 flow, removed 4 selfloop flow, removed 3 redundant places. [2022-07-12 10:25:46,984 INFO L242 Difference]: Finished difference. Result has 253 places, 239 transitions, 724 flow [2022-07-12 10:25:46,985 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} [2022-07-12 10:25:46,985 INFO L279 CegarLoopForPetriNet]: 217 programPoint places, 36 predicate places. [2022-07-12 10:25:46,985 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 239 transitions, 724 flow [2022-07-12 10:25:46,986 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) [2022-07-12 10:25:46,986 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:25:46,986 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] [2022-07-12 10:25:46,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-12 10:25:46,986 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:25:46,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:25:46,987 INFO L85 PathProgramCache]: Analyzing trace with hash 851981685, now seen corresponding path program 1 times [2022-07-12 10:25:46,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:25:46,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984527606] [2022-07-12 10:25:46,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:25:46,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:25:47,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:25:47,089 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:25:47,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:25:47,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984527606] [2022-07-12 10:25:47,089 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984527606] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:25:47,089 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:25:47,090 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-12 10:25:47,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683748776] [2022-07-12 10:25:47,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:25:47,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-12 10:25:47,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:25:47,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-12 10:25:47,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-07-12 10:25:47,092 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 246 [2022-07-12 10:25:47,093 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) [2022-07-12 10:25:47,093 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:25:47,093 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 246 [2022-07-12 10:25:47,093 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:25:47,301 INFO L129 PetriNetUnfolder]: 78/727 cut-off events. [2022-07-12 10:25:47,302 INFO L130 PetriNetUnfolder]: For 662/698 co-relation queries the response was YES. [2022-07-12 10:25:47,304 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. [2022-07-12 10:25:47,305 INFO L132 encePairwiseOnDemand]: 237/246 looper letters, 91 selfloop transitions, 3 changer transitions 19/290 dead transitions. [2022-07-12 10:25:47,306 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 290 transitions, 1219 flow [2022-07-12 10:25:47,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-12 10:25:47,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-07-12 10:25:47,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2447 transitions. [2022-07-12 10:25:47,310 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7651657285803627 [2022-07-12 10:25:47,310 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2447 transitions. [2022-07-12 10:25:47,310 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2447 transitions. [2022-07-12 10:25:47,311 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:25:47,311 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2447 transitions. [2022-07-12 10:25:47,314 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) [2022-07-12 10:25:47,317 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) [2022-07-12 10:25:47,318 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) [2022-07-12 10:25:47,318 INFO L186 Difference]: Start difference. First operand has 253 places, 239 transitions, 724 flow. Second operand 13 states and 2447 transitions. [2022-07-12 10:25:47,318 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 290 transitions, 1219 flow [2022-07-12 10:25:47,322 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 290 transitions, 1218 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-12 10:25:47,325 INFO L242 Difference]: Finished difference. Result has 273 places, 239 transitions, 750 flow [2022-07-12 10:25:47,326 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} [2022-07-12 10:25:47,326 INFO L279 CegarLoopForPetriNet]: 217 programPoint places, 56 predicate places. [2022-07-12 10:25:47,326 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 239 transitions, 750 flow [2022-07-12 10:25:47,327 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) [2022-07-12 10:25:47,327 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:25:47,327 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] [2022-07-12 10:25:47,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-12 10:25:47,328 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:25:47,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:25:47,328 INFO L85 PathProgramCache]: Analyzing trace with hash -2082922393, now seen corresponding path program 1 times [2022-07-12 10:25:47,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:25:47,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453098188] [2022-07-12 10:25:47,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:25:47,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:25:47,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:25:47,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:25:47,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:25:47,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453098188] [2022-07-12 10:25:47,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453098188] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:25:47,746 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:25:47,746 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-07-12 10:25:47,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020731724] [2022-07-12 10:25:47,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:25:47,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-12 10:25:47,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:25:47,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-12 10:25:47,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2022-07-12 10:25:47,751 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 246 [2022-07-12 10:25:47,753 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) [2022-07-12 10:25:47,753 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:25:47,753 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 246 [2022-07-12 10:25:47,753 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:25:48,944 INFO L129 PetriNetUnfolder]: 285/2460 cut-off events. [2022-07-12 10:25:48,945 INFO L130 PetriNetUnfolder]: For 1983/2042 co-relation queries the response was YES. [2022-07-12 10:25:48,952 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. [2022-07-12 10:25:48,958 INFO L132 encePairwiseOnDemand]: 215/246 looper letters, 168 selfloop transitions, 51 changer transitions 19/405 dead transitions. [2022-07-12 10:25:48,958 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 405 transitions, 1853 flow [2022-07-12 10:25:48,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-07-12 10:25:48,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2022-07-12 10:25:48,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 4667 transitions. [2022-07-12 10:25:48,966 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6775551684088269 [2022-07-12 10:25:48,966 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 4667 transitions. [2022-07-12 10:25:48,966 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 4667 transitions. [2022-07-12 10:25:48,968 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:25:48,968 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 4667 transitions. [2022-07-12 10:25:48,974 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) [2022-07-12 10:25:48,981 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) [2022-07-12 10:25:48,982 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) [2022-07-12 10:25:48,982 INFO L186 Difference]: Start difference. First operand has 273 places, 239 transitions, 750 flow. Second operand 28 states and 4667 transitions. [2022-07-12 10:25:48,983 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 405 transitions, 1853 flow [2022-07-12 10:25:48,991 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 405 transitions, 1707 flow, removed 35 selfloop flow, removed 11 redundant places. [2022-07-12 10:25:48,997 INFO L242 Difference]: Finished difference. Result has 294 places, 280 transitions, 1142 flow [2022-07-12 10:25:48,998 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} [2022-07-12 10:25:48,999 INFO L279 CegarLoopForPetriNet]: 217 programPoint places, 77 predicate places. [2022-07-12 10:25:48,999 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 280 transitions, 1142 flow [2022-07-12 10:25:49,000 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) [2022-07-12 10:25:49,000 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:25:49,000 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] [2022-07-12 10:25:49,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-12 10:25:49,000 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:25:49,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:25:49,001 INFO L85 PathProgramCache]: Analyzing trace with hash -939159561, now seen corresponding path program 2 times [2022-07-12 10:25:49,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:25:49,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532455288] [2022-07-12 10:25:49,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:25:49,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:25:49,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:25:49,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:25:49,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:25:49,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532455288] [2022-07-12 10:25:49,080 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532455288] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:25:49,080 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:25:49,080 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-12 10:25:49,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656593730] [2022-07-12 10:25:49,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:25:49,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-12 10:25:49,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:25:49,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-12 10:25:49,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-07-12 10:25:49,082 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 246 [2022-07-12 10:25:49,083 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) [2022-07-12 10:25:49,084 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:25:49,084 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 246 [2022-07-12 10:25:49,084 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:25:49,504 INFO L129 PetriNetUnfolder]: 223/2133 cut-off events. [2022-07-12 10:25:49,505 INFO L130 PetriNetUnfolder]: For 2997/3135 co-relation queries the response was YES. [2022-07-12 10:25:49,511 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. [2022-07-12 10:25:49,516 INFO L132 encePairwiseOnDemand]: 237/246 looper letters, 113 selfloop transitions, 8 changer transitions 20/326 dead transitions. [2022-07-12 10:25:49,516 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 326 transitions, 1629 flow [2022-07-12 10:25:49,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-12 10:25:49,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-07-12 10:25:49,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2446 transitions. [2022-07-12 10:25:49,519 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7648530331457161 [2022-07-12 10:25:49,519 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2446 transitions. [2022-07-12 10:25:49,519 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2446 transitions. [2022-07-12 10:25:49,519 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:25:49,519 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2446 transitions. [2022-07-12 10:25:49,522 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) [2022-07-12 10:25:49,525 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) [2022-07-12 10:25:49,526 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) [2022-07-12 10:25:49,526 INFO L186 Difference]: Start difference. First operand has 294 places, 280 transitions, 1142 flow. Second operand 13 states and 2446 transitions. [2022-07-12 10:25:49,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 326 transitions, 1629 flow [2022-07-12 10:25:49,537 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 326 transitions, 1541 flow, removed 34 selfloop flow, removed 12 redundant places. [2022-07-12 10:25:49,541 INFO L242 Difference]: Finished difference. Result has 301 places, 280 transitions, 1100 flow [2022-07-12 10:25:49,541 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} [2022-07-12 10:25:49,542 INFO L279 CegarLoopForPetriNet]: 217 programPoint places, 84 predicate places. [2022-07-12 10:25:49,542 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 280 transitions, 1100 flow [2022-07-12 10:25:49,542 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) [2022-07-12 10:25:49,543 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:25:49,543 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] [2022-07-12 10:25:49,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-12 10:25:49,543 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:25:49,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:25:49,544 INFO L85 PathProgramCache]: Analyzing trace with hash 212833077, now seen corresponding path program 3 times [2022-07-12 10:25:49,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:25:49,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044268143] [2022-07-12 10:25:49,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:25:49,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:25:49,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:25:49,616 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:25:49,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:25:49,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044268143] [2022-07-12 10:25:49,617 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044268143] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:25:49,617 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:25:49,617 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-12 10:25:49,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238888020] [2022-07-12 10:25:49,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:25:49,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-12 10:25:49,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:25:49,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-12 10:25:49,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-07-12 10:25:49,619 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 246 [2022-07-12 10:25:49,620 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) [2022-07-12 10:25:49,620 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:25:49,620 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 246 [2022-07-12 10:25:49,620 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:25:50,046 INFO L129 PetriNetUnfolder]: 226/2159 cut-off events. [2022-07-12 10:25:50,046 INFO L130 PetriNetUnfolder]: For 3614/3752 co-relation queries the response was YES. [2022-07-12 10:25:50,053 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. [2022-07-12 10:25:50,065 INFO L132 encePairwiseOnDemand]: 237/246 looper letters, 113 selfloop transitions, 10 changer transitions 19/327 dead transitions. [2022-07-12 10:25:50,066 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 327 transitions, 1801 flow [2022-07-12 10:25:50,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-12 10:25:50,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-07-12 10:25:50,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2068 transitions. [2022-07-12 10:25:50,070 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7642276422764228 [2022-07-12 10:25:50,070 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2068 transitions. [2022-07-12 10:25:50,070 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2068 transitions. [2022-07-12 10:25:50,072 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:25:50,072 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2068 transitions. [2022-07-12 10:25:50,074 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) [2022-07-12 10:25:50,077 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) [2022-07-12 10:25:50,077 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) [2022-07-12 10:25:50,077 INFO L186 Difference]: Start difference. First operand has 301 places, 280 transitions, 1100 flow. Second operand 11 states and 2068 transitions. [2022-07-12 10:25:50,077 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 327 transitions, 1801 flow [2022-07-12 10:25:50,091 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 327 transitions, 1611 flow, removed 46 selfloop flow, removed 12 redundant places. [2022-07-12 10:25:50,094 INFO L242 Difference]: Finished difference. Result has 299 places, 288 transitions, 1157 flow [2022-07-12 10:25:50,095 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} [2022-07-12 10:25:50,095 INFO L279 CegarLoopForPetriNet]: 217 programPoint places, 82 predicate places. [2022-07-12 10:25:50,096 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 288 transitions, 1157 flow [2022-07-12 10:25:50,096 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) [2022-07-12 10:25:50,096 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:25:50,096 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] [2022-07-12 10:25:50,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-12 10:25:50,097 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:25:50,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:25:50,097 INFO L85 PathProgramCache]: Analyzing trace with hash -1634429333, now seen corresponding path program 4 times [2022-07-12 10:25:50,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:25:50,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063399368] [2022-07-12 10:25:50,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:25:50,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:25:50,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:25:50,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:25:50,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:25:50,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063399368] [2022-07-12 10:25:50,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063399368] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:25:50,163 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:25:50,163 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-12 10:25:50,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381638674] [2022-07-12 10:25:50,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:25:50,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-12 10:25:50,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:25:50,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-12 10:25:50,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-07-12 10:25:50,166 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 246 [2022-07-12 10:25:50,167 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) [2022-07-12 10:25:50,167 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:25:50,167 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 246 [2022-07-12 10:25:50,167 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:25:50,531 INFO L129 PetriNetUnfolder]: 220/2150 cut-off events. [2022-07-12 10:25:50,531 INFO L130 PetriNetUnfolder]: For 3076/3229 co-relation queries the response was YES. [2022-07-12 10:25:50,538 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. [2022-07-12 10:25:50,544 INFO L132 encePairwiseOnDemand]: 237/246 looper letters, 103 selfloop transitions, 10 changer transitions 25/323 dead transitions. [2022-07-12 10:25:50,544 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 323 transitions, 1700 flow [2022-07-12 10:25:50,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-12 10:25:50,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-07-12 10:25:50,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2065 transitions. [2022-07-12 10:25:50,546 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7631189948263118 [2022-07-12 10:25:50,546 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2065 transitions. [2022-07-12 10:25:50,546 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2065 transitions. [2022-07-12 10:25:50,547 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:25:50,547 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2065 transitions. [2022-07-12 10:25:50,549 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) [2022-07-12 10:25:50,551 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) [2022-07-12 10:25:50,552 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) [2022-07-12 10:25:50,552 INFO L186 Difference]: Start difference. First operand has 299 places, 288 transitions, 1157 flow. Second operand 11 states and 2065 transitions. [2022-07-12 10:25:50,553 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 323 transitions, 1700 flow [2022-07-12 10:25:50,563 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 323 transitions, 1635 flow, removed 27 selfloop flow, removed 6 redundant places. [2022-07-12 10:25:50,566 INFO L242 Difference]: Finished difference. Result has 306 places, 294 transitions, 1236 flow [2022-07-12 10:25:50,567 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} [2022-07-12 10:25:50,567 INFO L279 CegarLoopForPetriNet]: 217 programPoint places, 89 predicate places. [2022-07-12 10:25:50,569 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 294 transitions, 1236 flow [2022-07-12 10:25:50,569 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) [2022-07-12 10:25:50,569 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:25:50,570 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] [2022-07-12 10:25:50,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-12 10:25:50,570 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:25:50,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:25:50,570 INFO L85 PathProgramCache]: Analyzing trace with hash -357227217, now seen corresponding path program 5 times [2022-07-12 10:25:50,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:25:50,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226794206] [2022-07-12 10:25:50,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:25:50,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:25:50,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:25:50,653 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:25:50,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:25:50,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226794206] [2022-07-12 10:25:50,654 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226794206] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:25:50,654 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:25:50,654 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-12 10:25:50,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005499590] [2022-07-12 10:25:50,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:25:50,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-12 10:25:50,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:25:50,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-12 10:25:50,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-07-12 10:25:50,656 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 246 [2022-07-12 10:25:50,657 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) [2022-07-12 10:25:50,658 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:25:50,658 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 246 [2022-07-12 10:25:50,658 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:25:51,008 INFO L129 PetriNetUnfolder]: 208/2094 cut-off events. [2022-07-12 10:25:51,008 INFO L130 PetriNetUnfolder]: For 3213/3375 co-relation queries the response was YES. [2022-07-12 10:25:51,017 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. [2022-07-12 10:25:51,022 INFO L132 encePairwiseOnDemand]: 237/246 looper letters, 99 selfloop transitions, 4 changer transitions 26/314 dead transitions. [2022-07-12 10:25:51,022 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 314 transitions, 1607 flow [2022-07-12 10:25:51,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-12 10:25:51,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-07-12 10:25:51,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2244 transitions. [2022-07-12 10:25:51,025 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7601626016260162 [2022-07-12 10:25:51,025 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2244 transitions. [2022-07-12 10:25:51,025 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2244 transitions. [2022-07-12 10:25:51,025 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:25:51,025 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2244 transitions. [2022-07-12 10:25:51,027 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) [2022-07-12 10:25:51,030 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) [2022-07-12 10:25:51,030 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) [2022-07-12 10:25:51,030 INFO L186 Difference]: Start difference. First operand has 306 places, 294 transitions, 1236 flow. Second operand 12 states and 2244 transitions. [2022-07-12 10:25:51,031 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 314 transitions, 1607 flow [2022-07-12 10:25:51,043 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 314 transitions, 1542 flow, removed 28 selfloop flow, removed 6 redundant places. [2022-07-12 10:25:51,046 INFO L242 Difference]: Finished difference. Result has 311 places, 285 transitions, 1117 flow [2022-07-12 10:25:51,046 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} [2022-07-12 10:25:51,047 INFO L279 CegarLoopForPetriNet]: 217 programPoint places, 94 predicate places. [2022-07-12 10:25:51,047 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 285 transitions, 1117 flow [2022-07-12 10:25:51,047 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) [2022-07-12 10:25:51,047 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:25:51,048 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] [2022-07-12 10:25:51,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-07-12 10:25:51,048 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:25:51,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:25:51,048 INFO L85 PathProgramCache]: Analyzing trace with hash -971924477, now seen corresponding path program 6 times [2022-07-12 10:25:51,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:25:51,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178099279] [2022-07-12 10:25:51,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:25:51,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:25:51,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:25:51,137 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:25:51,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:25:51,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178099279] [2022-07-12 10:25:51,138 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178099279] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:25:51,138 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:25:51,138 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-12 10:25:51,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382030778] [2022-07-12 10:25:51,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:25:51,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-12 10:25:51,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:25:51,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-12 10:25:51,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-07-12 10:25:51,140 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 246 [2022-07-12 10:25:51,141 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) [2022-07-12 10:25:51,141 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:25:51,141 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 246 [2022-07-12 10:25:51,141 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:25:51,542 INFO L129 PetriNetUnfolder]: 187/1888 cut-off events. [2022-07-12 10:25:51,542 INFO L130 PetriNetUnfolder]: For 2635/2773 co-relation queries the response was YES. [2022-07-12 10:25:51,552 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. [2022-07-12 10:25:51,556 INFO L132 encePairwiseOnDemand]: 237/246 looper letters, 94 selfloop transitions, 2 changer transitions 27/307 dead transitions. [2022-07-12 10:25:51,556 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 307 transitions, 1479 flow [2022-07-12 10:25:51,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-12 10:25:51,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-07-12 10:25:51,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2244 transitions. [2022-07-12 10:25:51,559 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7601626016260162 [2022-07-12 10:25:51,559 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2244 transitions. [2022-07-12 10:25:51,559 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2244 transitions. [2022-07-12 10:25:51,560 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:25:51,560 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2244 transitions. [2022-07-12 10:25:51,562 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) [2022-07-12 10:25:51,564 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) [2022-07-12 10:25:51,565 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) [2022-07-12 10:25:51,565 INFO L186 Difference]: Start difference. First operand has 311 places, 285 transitions, 1117 flow. Second operand 12 states and 2244 transitions. [2022-07-12 10:25:51,565 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 307 transitions, 1479 flow [2022-07-12 10:25:51,577 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 307 transitions, 1421 flow, removed 18 selfloop flow, removed 12 redundant places. [2022-07-12 10:25:51,579 INFO L242 Difference]: Finished difference. Result has 302 places, 271 transitions, 982 flow [2022-07-12 10:25:51,580 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} [2022-07-12 10:25:51,580 INFO L279 CegarLoopForPetriNet]: 217 programPoint places, 85 predicate places. [2022-07-12 10:25:51,580 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 271 transitions, 982 flow [2022-07-12 10:25:51,581 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) [2022-07-12 10:25:51,581 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:25:51,581 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] [2022-07-12 10:25:51,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-07-12 10:25:51,581 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:25:51,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:25:51,582 INFO L85 PathProgramCache]: Analyzing trace with hash -35243063, now seen corresponding path program 2 times [2022-07-12 10:25:51,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:25:51,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142976554] [2022-07-12 10:25:51,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:25:51,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:25:51,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:25:51,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:25:51,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:25:51,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142976554] [2022-07-12 10:25:51,611 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142976554] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:25:51,611 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:25:51,611 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-12 10:25:51,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041072131] [2022-07-12 10:25:51,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:25:51,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 10:25:51,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:25:51,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 10:25:51,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-12 10:25:51,614 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 218 out of 246 [2022-07-12 10:25:51,615 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) [2022-07-12 10:25:51,615 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:25:51,615 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 218 of 246 [2022-07-12 10:25:51,615 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:25:51,787 INFO L129 PetriNetUnfolder]: 132/1671 cut-off events. [2022-07-12 10:25:51,787 INFO L130 PetriNetUnfolder]: For 1057/1112 co-relation queries the response was YES. [2022-07-12 10:25:51,794 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. [2022-07-12 10:25:51,797 INFO L132 encePairwiseOnDemand]: 242/246 looper letters, 21 selfloop transitions, 2 changer transitions 7/271 dead transitions. [2022-07-12 10:25:51,798 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 271 transitions, 1013 flow [2022-07-12 10:25:51,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-12 10:25:51,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-07-12 10:25:51,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 894 transitions. [2022-07-12 10:25:51,801 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9085365853658537 [2022-07-12 10:25:51,801 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 894 transitions. [2022-07-12 10:25:51,801 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 894 transitions. [2022-07-12 10:25:51,802 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:25:51,802 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 894 transitions. [2022-07-12 10:25:51,803 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) [2022-07-12 10:25:51,804 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) [2022-07-12 10:25:51,804 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) [2022-07-12 10:25:51,805 INFO L186 Difference]: Start difference. First operand has 302 places, 271 transitions, 982 flow. Second operand 4 states and 894 transitions. [2022-07-12 10:25:51,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 271 transitions, 1013 flow [2022-07-12 10:25:51,811 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 271 transitions, 976 flow, removed 12 selfloop flow, removed 14 redundant places. [2022-07-12 10:25:51,814 INFO L242 Difference]: Finished difference. Result has 275 places, 261 transitions, 894 flow [2022-07-12 10:25:51,814 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} [2022-07-12 10:25:51,815 INFO L279 CegarLoopForPetriNet]: 217 programPoint places, 58 predicate places. [2022-07-12 10:25:51,815 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 261 transitions, 894 flow [2022-07-12 10:25:51,815 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) [2022-07-12 10:25:51,816 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:25:51,816 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] [2022-07-12 10:25:51,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-07-12 10:25:51,816 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:25:51,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:25:51,816 INFO L85 PathProgramCache]: Analyzing trace with hash -1853908145, now seen corresponding path program 5 times [2022-07-12 10:25:51,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:25:51,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302604181] [2022-07-12 10:25:51,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:25:51,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:25:51,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:25:51,892 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:25:51,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:25:51,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302604181] [2022-07-12 10:25:51,893 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302604181] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:25:51,893 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:25:51,893 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-12 10:25:51,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644701499] [2022-07-12 10:25:51,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:25:51,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-12 10:25:51,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:25:51,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-12 10:25:51,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-07-12 10:25:51,895 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 246 [2022-07-12 10:25:51,896 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) [2022-07-12 10:25:51,896 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:25:51,897 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 246 [2022-07-12 10:25:51,897 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:25:52,163 INFO L129 PetriNetUnfolder]: 139/1618 cut-off events. [2022-07-12 10:25:52,163 INFO L130 PetriNetUnfolder]: For 1439/1571 co-relation queries the response was YES. [2022-07-12 10:25:52,168 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. [2022-07-12 10:25:52,173 INFO L132 encePairwiseOnDemand]: 237/246 looper letters, 66 selfloop transitions, 4 changer transitions 21/274 dead transitions. [2022-07-12 10:25:52,173 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 274 transitions, 1139 flow [2022-07-12 10:25:52,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-12 10:25:52,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-07-12 10:25:52,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2236 transitions. [2022-07-12 10:25:52,176 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7574525745257452 [2022-07-12 10:25:52,176 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2236 transitions. [2022-07-12 10:25:52,176 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2236 transitions. [2022-07-12 10:25:52,176 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:25:52,176 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2236 transitions. [2022-07-12 10:25:52,178 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) [2022-07-12 10:25:52,181 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) [2022-07-12 10:25:52,181 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) [2022-07-12 10:25:52,181 INFO L186 Difference]: Start difference. First operand has 275 places, 261 transitions, 894 flow. Second operand 12 states and 2236 transitions. [2022-07-12 10:25:52,181 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 274 transitions, 1139 flow [2022-07-12 10:25:52,187 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 274 transitions, 1133 flow, removed 1 selfloop flow, removed 3 redundant places. [2022-07-12 10:25:52,190 INFO L242 Difference]: Finished difference. Result has 284 places, 253 transitions, 838 flow [2022-07-12 10:25:52,191 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} [2022-07-12 10:25:52,192 INFO L279 CegarLoopForPetriNet]: 217 programPoint places, 67 predicate places. [2022-07-12 10:25:52,192 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 253 transitions, 838 flow [2022-07-12 10:25:52,192 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) [2022-07-12 10:25:52,193 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:25:52,193 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] [2022-07-12 10:25:52,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-07-12 10:25:52,193 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:25:52,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:25:52,194 INFO L85 PathProgramCache]: Analyzing trace with hash 1256763865, now seen corresponding path program 6 times [2022-07-12 10:25:52,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:25:52,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856306860] [2022-07-12 10:25:52,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:25:52,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:25:52,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:25:52,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:25:52,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:25:52,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856306860] [2022-07-12 10:25:52,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856306860] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:25:52,271 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:25:52,272 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-12 10:25:52,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118312044] [2022-07-12 10:25:52,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:25:52,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-12 10:25:52,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:25:52,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-12 10:25:52,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-07-12 10:25:52,275 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 246 [2022-07-12 10:25:52,276 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) [2022-07-12 10:25:52,276 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:25:52,276 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 246 [2022-07-12 10:25:52,276 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:25:52,479 INFO L129 PetriNetUnfolder]: 118/1423 cut-off events. [2022-07-12 10:25:52,480 INFO L130 PetriNetUnfolder]: For 1112/1163 co-relation queries the response was YES. [2022-07-12 10:25:52,485 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. [2022-07-12 10:25:52,487 INFO L132 encePairwiseOnDemand]: 237/246 looper letters, 55 selfloop transitions, 0 changer transitions 31/261 dead transitions. [2022-07-12 10:25:52,488 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 261 transitions, 1028 flow [2022-07-12 10:25:52,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-12 10:25:52,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-07-12 10:25:52,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2049 transitions. [2022-07-12 10:25:52,490 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7572062084257206 [2022-07-12 10:25:52,490 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2049 transitions. [2022-07-12 10:25:52,490 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2049 transitions. [2022-07-12 10:25:52,490 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:25:52,491 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2049 transitions. [2022-07-12 10:25:52,493 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) [2022-07-12 10:25:52,495 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) [2022-07-12 10:25:52,496 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) [2022-07-12 10:25:52,496 INFO L186 Difference]: Start difference. First operand has 284 places, 253 transitions, 838 flow. Second operand 11 states and 2049 transitions. [2022-07-12 10:25:52,496 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 261 transitions, 1028 flow [2022-07-12 10:25:52,502 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 261 transitions, 950 flow, removed 20 selfloop flow, removed 17 redundant places. [2022-07-12 10:25:52,504 INFO L242 Difference]: Finished difference. Result has 268 places, 230 transitions, 631 flow [2022-07-12 10:25:52,504 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} [2022-07-12 10:25:52,505 INFO L279 CegarLoopForPetriNet]: 217 programPoint places, 51 predicate places. [2022-07-12 10:25:52,505 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 230 transitions, 631 flow [2022-07-12 10:25:52,505 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) [2022-07-12 10:25:52,505 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:25:52,506 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] [2022-07-12 10:25:52,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-07-12 10:25:52,506 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:25:52,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:25:52,507 INFO L85 PathProgramCache]: Analyzing trace with hash -1969817188, now seen corresponding path program 1 times [2022-07-12 10:25:52,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:25:52,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420671741] [2022-07-12 10:25:52,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:25:52,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:25:52,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:25:52,646 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:25:52,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:25:52,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420671741] [2022-07-12 10:25:52,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420671741] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:25:52,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037820182] [2022-07-12 10:25:52,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:25:52,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:25:52,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:25:52,660 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) [2022-07-12 10:25:52,679 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-12 10:25:52,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:25:52,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-12 10:25:52,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:25:53,120 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:25:53,120 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:25:53,371 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:25:53,371 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2037820182] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-12 10:25:53,372 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-12 10:25:53,372 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [15, 14] total 30 [2022-07-12 10:25:53,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423231163] [2022-07-12 10:25:53,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:25:53,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-12 10:25:53,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:25:53,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-12 10:25:53,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=742, Unknown=0, NotChecked=0, Total=870 [2022-07-12 10:25:53,375 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 246 [2022-07-12 10:25:53,376 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) [2022-07-12 10:25:53,376 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:25:53,376 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 246 [2022-07-12 10:25:53,376 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:25:54,094 INFO L129 PetriNetUnfolder]: 200/1818 cut-off events. [2022-07-12 10:25:54,094 INFO L130 PetriNetUnfolder]: For 654/667 co-relation queries the response was YES. [2022-07-12 10:25:54,107 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. [2022-07-12 10:25:54,111 INFO L132 encePairwiseOnDemand]: 226/246 looper letters, 144 selfloop transitions, 22 changer transitions 7/312 dead transitions. [2022-07-12 10:25:54,111 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 312 transitions, 1229 flow [2022-07-12 10:25:54,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-12 10:25:54,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2022-07-12 10:25:54,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 3340 transitions. [2022-07-12 10:25:54,114 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6788617886178862 [2022-07-12 10:25:54,114 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 3340 transitions. [2022-07-12 10:25:54,114 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 3340 transitions. [2022-07-12 10:25:54,115 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:25:54,115 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 3340 transitions. [2022-07-12 10:25:54,118 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) [2022-07-12 10:25:54,122 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) [2022-07-12 10:25:54,123 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) [2022-07-12 10:25:54,123 INFO L186 Difference]: Start difference. First operand has 268 places, 230 transitions, 631 flow. Second operand 20 states and 3340 transitions. [2022-07-12 10:25:54,123 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 312 transitions, 1229 flow [2022-07-12 10:25:54,126 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 312 transitions, 1197 flow, removed 16 selfloop flow, removed 4 redundant places. [2022-07-12 10:25:54,129 INFO L242 Difference]: Finished difference. Result has 263 places, 236 transitions, 725 flow [2022-07-12 10:25:54,129 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} [2022-07-12 10:25:54,130 INFO L279 CegarLoopForPetriNet]: 217 programPoint places, 46 predicate places. [2022-07-12 10:25:54,130 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 236 transitions, 725 flow [2022-07-12 10:25:54,131 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) [2022-07-12 10:25:54,131 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:25:54,131 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] [2022-07-12 10:25:54,161 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-12 10:25:54,347 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 [2022-07-12 10:25:54,347 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:25:54,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:25:54,350 INFO L85 PathProgramCache]: Analyzing trace with hash -763051188, now seen corresponding path program 2 times [2022-07-12 10:25:54,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:25:54,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209242959] [2022-07-12 10:25:54,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:25:54,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:25:54,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:25:54,477 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:25:54,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:25:54,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209242959] [2022-07-12 10:25:54,478 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209242959] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:25:54,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338613094] [2022-07-12 10:25:54,478 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 10:25:54,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:25:54,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:25:54,500 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) [2022-07-12 10:25:54,531 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-12 10:25:54,583 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-07-12 10:25:54,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:25:54,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 25 conjunts are in the unsatisfiable core [2022-07-12 10:25:54,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:25:55,007 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 10:25:55,007 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 10:25:55,007 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [338613094] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:25:55,008 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-12 10:25:55,008 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [15] total 28 [2022-07-12 10:25:55,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214747298] [2022-07-12 10:25:55,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:25:55,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-12 10:25:55,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:25:55,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-12 10:25:55,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=681, Unknown=0, NotChecked=0, Total=756 [2022-07-12 10:25:55,010 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 246 [2022-07-12 10:25:55,012 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) [2022-07-12 10:25:55,012 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:25:55,012 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 246 [2022-07-12 10:25:55,012 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:25:56,057 INFO L129 PetriNetUnfolder]: 203/1907 cut-off events. [2022-07-12 10:25:56,057 INFO L130 PetriNetUnfolder]: For 1024/1044 co-relation queries the response was YES. [2022-07-12 10:25:56,062 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. [2022-07-12 10:25:56,074 INFO L132 encePairwiseOnDemand]: 218/246 looper letters, 115 selfloop transitions, 33 changer transitions 17/304 dead transitions. [2022-07-12 10:25:56,074 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 304 transitions, 1278 flow [2022-07-12 10:25:56,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-07-12 10:25:56,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2022-07-12 10:25:56,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 4439 transitions. [2022-07-12 10:25:56,078 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6683227943390545 [2022-07-12 10:25:56,083 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 4439 transitions. [2022-07-12 10:25:56,083 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 4439 transitions. [2022-07-12 10:25:56,084 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:25:56,087 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 4439 transitions. [2022-07-12 10:25:56,097 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) [2022-07-12 10:25:56,102 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) [2022-07-12 10:25:56,102 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) [2022-07-12 10:25:56,103 INFO L186 Difference]: Start difference. First operand has 263 places, 236 transitions, 725 flow. Second operand 27 states and 4439 transitions. [2022-07-12 10:25:56,103 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 304 transitions, 1278 flow [2022-07-12 10:25:56,107 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 304 transitions, 1223 flow, removed 17 selfloop flow, removed 11 redundant places. [2022-07-12 10:25:56,110 INFO L242 Difference]: Finished difference. Result has 282 places, 251 transitions, 855 flow [2022-07-12 10:25:56,110 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} [2022-07-12 10:25:56,110 INFO L279 CegarLoopForPetriNet]: 217 programPoint places, 65 predicate places. [2022-07-12 10:25:56,110 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 251 transitions, 855 flow [2022-07-12 10:25:56,111 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) [2022-07-12 10:25:56,111 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:25:56,111 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] [2022-07-12 10:25:56,127 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-07-12 10:25:56,327 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 [2022-07-12 10:25:56,328 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:25:56,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:25:56,328 INFO L85 PathProgramCache]: Analyzing trace with hash 1596680157, now seen corresponding path program 1 times [2022-07-12 10:25:56,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:25:56,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331676528] [2022-07-12 10:25:56,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:25:56,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:25:56,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:25:56,457 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:25:56,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:25:56,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331676528] [2022-07-12 10:25:56,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331676528] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:25:56,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071901422] [2022-07-12 10:25:56,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:25:56,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:25:56,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:25:56,459 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) [2022-07-12 10:25:56,476 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-12 10:25:56,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:25:56,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-12 10:25:56,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:25:56,876 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:25:56,876 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:25:57,141 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:25:57,141 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2071901422] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-12 10:25:57,141 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-12 10:25:57,141 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [15, 14] total 30 [2022-07-12 10:25:57,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032303021] [2022-07-12 10:25:57,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:25:57,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-12 10:25:57,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:25:57,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-12 10:25:57,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=742, Unknown=0, NotChecked=0, Total=870 [2022-07-12 10:25:57,145 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 246 [2022-07-12 10:25:57,146 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) [2022-07-12 10:25:57,146 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:25:57,146 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 246 [2022-07-12 10:25:57,146 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:25:57,692 INFO L129 PetriNetUnfolder]: 262/2374 cut-off events. [2022-07-12 10:25:57,692 INFO L130 PetriNetUnfolder]: For 1738/1761 co-relation queries the response was YES. [2022-07-12 10:25:57,700 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. [2022-07-12 10:25:57,704 INFO L132 encePairwiseOnDemand]: 229/246 looper letters, 158 selfloop transitions, 23 changer transitions 11/331 dead transitions. [2022-07-12 10:25:57,704 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 331 transitions, 1557 flow [2022-07-12 10:25:57,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-12 10:25:57,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-07-12 10:25:57,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 3027 transitions. [2022-07-12 10:25:57,707 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6836043360433605 [2022-07-12 10:25:57,707 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 3027 transitions. [2022-07-12 10:25:57,708 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 3027 transitions. [2022-07-12 10:25:57,708 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:25:57,708 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 3027 transitions. [2022-07-12 10:25:57,712 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) [2022-07-12 10:25:57,714 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) [2022-07-12 10:25:57,715 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) [2022-07-12 10:25:57,715 INFO L186 Difference]: Start difference. First operand has 282 places, 251 transitions, 855 flow. Second operand 18 states and 3027 transitions. [2022-07-12 10:25:57,715 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 331 transitions, 1557 flow [2022-07-12 10:25:57,721 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 331 transitions, 1494 flow, removed 18 selfloop flow, removed 16 redundant places. [2022-07-12 10:25:57,724 INFO L242 Difference]: Finished difference. Result has 281 places, 255 transitions, 923 flow [2022-07-12 10:25:57,724 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} [2022-07-12 10:25:57,725 INFO L279 CegarLoopForPetriNet]: 217 programPoint places, 64 predicate places. [2022-07-12 10:25:57,725 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 255 transitions, 923 flow [2022-07-12 10:25:57,726 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) [2022-07-12 10:25:57,726 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:25:57,726 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] [2022-07-12 10:25:57,761 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-12 10:25:57,943 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 [2022-07-12 10:25:57,943 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:25:57,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:25:57,944 INFO L85 PathProgramCache]: Analyzing trace with hash 787751393, now seen corresponding path program 2 times [2022-07-12 10:25:57,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:25:57,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366353367] [2022-07-12 10:25:57,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:25:57,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:25:57,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:25:58,082 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:25:58,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:25:58,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366353367] [2022-07-12 10:25:58,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366353367] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:25:58,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1860307804] [2022-07-12 10:25:58,083 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 10:25:58,083 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:25:58,083 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:25:58,084 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) [2022-07-12 10:25:58,085 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-12 10:25:58,165 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-07-12 10:25:58,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:25:58,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 24 conjunts are in the unsatisfiable core [2022-07-12 10:25:58,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:25:58,448 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 10:25:58,448 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 10:25:58,448 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1860307804] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:25:58,448 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-12 10:25:58,448 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [15] total 27 [2022-07-12 10:25:58,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646296198] [2022-07-12 10:25:58,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:25:58,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-12 10:25:58,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:25:58,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-12 10:25:58,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=626, Unknown=0, NotChecked=0, Total=702 [2022-07-12 10:25:58,452 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 177 out of 246 [2022-07-12 10:25:58,453 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) [2022-07-12 10:25:58,453 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:25:58,453 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 177 of 246 [2022-07-12 10:25:58,453 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:25:59,094 INFO L129 PetriNetUnfolder]: 244/2464 cut-off events. [2022-07-12 10:25:59,095 INFO L130 PetriNetUnfolder]: For 1968/2013 co-relation queries the response was YES. [2022-07-12 10:25:59,103 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. [2022-07-12 10:25:59,107 INFO L132 encePairwiseOnDemand]: 224/246 looper letters, 62 selfloop transitions, 46 changer transitions 24/303 dead transitions. [2022-07-12 10:25:59,107 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 303 transitions, 1423 flow [2022-07-12 10:25:59,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-12 10:25:59,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-07-12 10:25:59,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 3266 transitions. [2022-07-12 10:25:59,126 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7375790424570913 [2022-07-12 10:25:59,126 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 3266 transitions. [2022-07-12 10:25:59,126 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 3266 transitions. [2022-07-12 10:25:59,127 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:25:59,127 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 3266 transitions. [2022-07-12 10:25:59,130 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) [2022-07-12 10:25:59,132 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) [2022-07-12 10:25:59,132 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) [2022-07-12 10:25:59,133 INFO L186 Difference]: Start difference. First operand has 281 places, 255 transitions, 923 flow. Second operand 18 states and 3266 transitions. [2022-07-12 10:25:59,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 303 transitions, 1423 flow [2022-07-12 10:25:59,140 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 303 transitions, 1366 flow, removed 18 selfloop flow, removed 10 redundant places. [2022-07-12 10:25:59,142 INFO L242 Difference]: Finished difference. Result has 292 places, 267 transitions, 1073 flow [2022-07-12 10:25:59,143 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} [2022-07-12 10:25:59,143 INFO L279 CegarLoopForPetriNet]: 217 programPoint places, 75 predicate places. [2022-07-12 10:25:59,143 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 267 transitions, 1073 flow [2022-07-12 10:25:59,144 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) [2022-07-12 10:25:59,144 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:25:59,144 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] [2022-07-12 10:25:59,161 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-12 10:25:59,361 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 [2022-07-12 10:25:59,361 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:25:59,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:25:59,362 INFO L85 PathProgramCache]: Analyzing trace with hash -1121357044, now seen corresponding path program 1 times [2022-07-12 10:25:59,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:25:59,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647524192] [2022-07-12 10:25:59,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:25:59,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:25:59,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:25:59,432 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:25:59,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:25:59,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647524192] [2022-07-12 10:25:59,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647524192] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:25:59,432 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:25:59,433 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-12 10:25:59,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153617440] [2022-07-12 10:25:59,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:25:59,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-12 10:25:59,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:25:59,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-12 10:25:59,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-12 10:25:59,435 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 246 [2022-07-12 10:25:59,435 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) [2022-07-12 10:25:59,435 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:25:59,435 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 246 [2022-07-12 10:25:59,436 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:25:59,724 INFO L129 PetriNetUnfolder]: 318/1882 cut-off events. [2022-07-12 10:25:59,725 INFO L130 PetriNetUnfolder]: For 2388/2415 co-relation queries the response was YES. [2022-07-12 10:25:59,732 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. [2022-07-12 10:25:59,736 INFO L132 encePairwiseOnDemand]: 235/246 looper letters, 69 selfloop transitions, 12 changer transitions 8/272 dead transitions. [2022-07-12 10:25:59,736 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 272 transitions, 1226 flow [2022-07-12 10:25:59,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-12 10:25:59,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-07-12 10:25:59,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1985 transitions. [2022-07-12 10:25:59,738 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.806910569105691 [2022-07-12 10:25:59,738 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1985 transitions. [2022-07-12 10:25:59,738 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1985 transitions. [2022-07-12 10:25:59,738 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:25:59,738 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1985 transitions. [2022-07-12 10:25:59,740 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) [2022-07-12 10:25:59,741 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) [2022-07-12 10:25:59,742 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) [2022-07-12 10:25:59,742 INFO L186 Difference]: Start difference. First operand has 292 places, 267 transitions, 1073 flow. Second operand 10 states and 1985 transitions. [2022-07-12 10:25:59,742 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 272 transitions, 1226 flow [2022-07-12 10:25:59,750 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 272 transitions, 1201 flow, removed 10 selfloop flow, removed 9 redundant places. [2022-07-12 10:25:59,752 INFO L242 Difference]: Finished difference. Result has 281 places, 249 transitions, 932 flow [2022-07-12 10:25:59,753 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} [2022-07-12 10:25:59,753 INFO L279 CegarLoopForPetriNet]: 217 programPoint places, 64 predicate places. [2022-07-12 10:25:59,753 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 249 transitions, 932 flow [2022-07-12 10:25:59,753 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) [2022-07-12 10:25:59,753 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:25:59,754 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] [2022-07-12 10:25:59,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-07-12 10:25:59,754 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:25:59,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:25:59,754 INFO L85 PathProgramCache]: Analyzing trace with hash 1013334828, now seen corresponding path program 1 times [2022-07-12 10:25:59,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:25:59,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118350161] [2022-07-12 10:25:59,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:25:59,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:25:59,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:25:59,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:25:59,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:25:59,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118350161] [2022-07-12 10:25:59,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118350161] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:25:59,794 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:25:59,794 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-12 10:25:59,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280017536] [2022-07-12 10:25:59,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:25:59,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-12 10:25:59,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:25:59,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-12 10:25:59,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-12 10:25:59,796 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 246 [2022-07-12 10:25:59,796 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) [2022-07-12 10:25:59,796 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:25:59,797 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 246 [2022-07-12 10:25:59,797 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:25:59,970 INFO L129 PetriNetUnfolder]: 182/1316 cut-off events. [2022-07-12 10:25:59,970 INFO L130 PetriNetUnfolder]: For 2028/2052 co-relation queries the response was YES. [2022-07-12 10:25:59,974 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. [2022-07-12 10:25:59,976 INFO L132 encePairwiseOnDemand]: 235/246 looper letters, 45 selfloop transitions, 8 changer transitions 32/255 dead transitions. [2022-07-12 10:25:59,976 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 255 transitions, 1080 flow [2022-07-12 10:25:59,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-12 10:25:59,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-07-12 10:25:59,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1980 transitions. [2022-07-12 10:25:59,978 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8048780487804879 [2022-07-12 10:25:59,978 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1980 transitions. [2022-07-12 10:25:59,978 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1980 transitions. [2022-07-12 10:25:59,978 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:25:59,978 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1980 transitions. [2022-07-12 10:25:59,980 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) [2022-07-12 10:25:59,981 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) [2022-07-12 10:25:59,981 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) [2022-07-12 10:25:59,981 INFO L186 Difference]: Start difference. First operand has 281 places, 249 transitions, 932 flow. Second operand 10 states and 1980 transitions. [2022-07-12 10:25:59,982 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 255 transitions, 1080 flow [2022-07-12 10:25:59,986 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 255 transitions, 1021 flow, removed 17 selfloop flow, removed 11 redundant places. [2022-07-12 10:25:59,989 INFO L242 Difference]: Finished difference. Result has 278 places, 221 transitions, 689 flow [2022-07-12 10:25:59,989 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} [2022-07-12 10:25:59,989 INFO L279 CegarLoopForPetriNet]: 217 programPoint places, 61 predicate places. [2022-07-12 10:25:59,989 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 221 transitions, 689 flow [2022-07-12 10:25:59,990 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) [2022-07-12 10:25:59,990 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:25:59,990 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] [2022-07-12 10:25:59,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-07-12 10:25:59,990 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:25:59,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:25:59,991 INFO L85 PathProgramCache]: Analyzing trace with hash 1744496546, now seen corresponding path program 1 times [2022-07-12 10:25:59,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:25:59,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908927481] [2022-07-12 10:25:59,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:25:59,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:26:00,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:26:00,100 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:26:00,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:26:00,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908927481] [2022-07-12 10:26:00,101 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908927481] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:26:00,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705536646] [2022-07-12 10:26:00,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:26:00,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:26:00,101 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:26:00,102 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) [2022-07-12 10:26:00,158 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-12 10:26:00,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:26:00,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-12 10:26:00,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:26:00,400 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:26:00,401 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:26:00,623 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:26:00,623 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1705536646] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-12 10:26:00,623 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-12 10:26:00,624 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [13, 11] total 23 [2022-07-12 10:26:00,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926930874] [2022-07-12 10:26:00,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:26:00,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-12 10:26:00,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:26:00,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-12 10:26:00,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=385, Unknown=0, NotChecked=0, Total=506 [2022-07-12 10:26:00,626 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 189 out of 246 [2022-07-12 10:26:00,627 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) [2022-07-12 10:26:00,627 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:26:00,627 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 189 of 246 [2022-07-12 10:26:00,627 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:26:00,932 INFO L129 PetriNetUnfolder]: 182/1293 cut-off events. [2022-07-12 10:26:00,933 INFO L130 PetriNetUnfolder]: For 1360/1384 co-relation queries the response was YES. [2022-07-12 10:26:00,937 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. [2022-07-12 10:26:00,940 INFO L132 encePairwiseOnDemand]: 232/246 looper letters, 72 selfloop transitions, 15 changer transitions 0/255 dead transitions. [2022-07-12 10:26:00,940 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 255 transitions, 1024 flow [2022-07-12 10:26:00,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-12 10:26:00,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-07-12 10:26:00,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2727 transitions. [2022-07-12 10:26:00,942 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7918118466898955 [2022-07-12 10:26:00,942 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2727 transitions. [2022-07-12 10:26:00,942 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2727 transitions. [2022-07-12 10:26:00,943 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:26:00,943 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2727 transitions. [2022-07-12 10:26:00,945 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) [2022-07-12 10:26:00,947 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) [2022-07-12 10:26:00,947 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) [2022-07-12 10:26:00,947 INFO L186 Difference]: Start difference. First operand has 278 places, 221 transitions, 689 flow. Second operand 14 states and 2727 transitions. [2022-07-12 10:26:00,947 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 255 transitions, 1024 flow [2022-07-12 10:26:00,951 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 255 transitions, 912 flow, removed 31 selfloop flow, removed 25 redundant places. [2022-07-12 10:26:00,954 INFO L242 Difference]: Finished difference. Result has 246 places, 225 transitions, 658 flow [2022-07-12 10:26:00,954 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} [2022-07-12 10:26:00,957 INFO L279 CegarLoopForPetriNet]: 217 programPoint places, 29 predicate places. [2022-07-12 10:26:00,957 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 225 transitions, 658 flow [2022-07-12 10:26:00,957 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) [2022-07-12 10:26:00,957 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:26:00,957 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] [2022-07-12 10:26:00,976 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-12 10:26:01,167 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 [2022-07-12 10:26:01,168 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:26:01,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:26:01,168 INFO L85 PathProgramCache]: Analyzing trace with hash -1895043908, now seen corresponding path program 1 times [2022-07-12 10:26:01,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:26:01,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70787592] [2022-07-12 10:26:01,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:26:01,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:26:01,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:26:01,208 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 10:26:01,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:26:01,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70787592] [2022-07-12 10:26:01,209 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70787592] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:26:01,209 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:26:01,209 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-12 10:26:01,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525749096] [2022-07-12 10:26:01,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:26:01,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-12 10:26:01,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:26:01,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-12 10:26:01,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-12 10:26:01,211 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 246 [2022-07-12 10:26:01,211 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) [2022-07-12 10:26:01,212 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:26:01,212 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 246 [2022-07-12 10:26:01,212 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:26:01,360 INFO L129 PetriNetUnfolder]: 148/967 cut-off events. [2022-07-12 10:26:01,361 INFO L130 PetriNetUnfolder]: For 547/594 co-relation queries the response was YES. [2022-07-12 10:26:01,363 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. [2022-07-12 10:26:01,365 INFO L132 encePairwiseOnDemand]: 237/246 looper letters, 56 selfloop transitions, 8 changer transitions 6/242 dead transitions. [2022-07-12 10:26:01,365 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 242 transitions, 875 flow [2022-07-12 10:26:01,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-12 10:26:01,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-07-12 10:26:01,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1591 transitions. [2022-07-12 10:26:01,367 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8084349593495935 [2022-07-12 10:26:01,367 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1591 transitions. [2022-07-12 10:26:01,367 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1591 transitions. [2022-07-12 10:26:01,367 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:26:01,367 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1591 transitions. [2022-07-12 10:26:01,368 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) [2022-07-12 10:26:01,369 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) [2022-07-12 10:26:01,370 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) [2022-07-12 10:26:01,370 INFO L186 Difference]: Start difference. First operand has 246 places, 225 transitions, 658 flow. Second operand 8 states and 1591 transitions. [2022-07-12 10:26:01,370 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 242 transitions, 875 flow [2022-07-12 10:26:01,372 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 242 transitions, 853 flow, removed 1 selfloop flow, removed 9 redundant places. [2022-07-12 10:26:01,374 INFO L242 Difference]: Finished difference. Result has 247 places, 225 transitions, 653 flow [2022-07-12 10:26:01,374 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} [2022-07-12 10:26:01,375 INFO L279 CegarLoopForPetriNet]: 217 programPoint places, 30 predicate places. [2022-07-12 10:26:01,375 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 225 transitions, 653 flow [2022-07-12 10:26:01,375 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) [2022-07-12 10:26:01,375 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:26:01,375 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] [2022-07-12 10:26:01,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-07-12 10:26:01,376 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:26:01,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:26:01,376 INFO L85 PathProgramCache]: Analyzing trace with hash -2092362064, now seen corresponding path program 1 times [2022-07-12 10:26:01,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:26:01,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255269928] [2022-07-12 10:26:01,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:26:01,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:26:01,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:26:01,422 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 10:26:01,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:26:01,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255269928] [2022-07-12 10:26:01,423 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255269928] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:26:01,423 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:26:01,423 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-12 10:26:01,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454851559] [2022-07-12 10:26:01,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:26:01,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-12 10:26:01,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:26:01,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-12 10:26:01,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-12 10:26:01,425 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 246 [2022-07-12 10:26:01,426 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) [2022-07-12 10:26:01,426 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:26:01,426 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 246 [2022-07-12 10:26:01,426 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:26:01,560 INFO L129 PetriNetUnfolder]: 93/717 cut-off events. [2022-07-12 10:26:01,560 INFO L130 PetriNetUnfolder]: For 464/467 co-relation queries the response was YES. [2022-07-12 10:26:01,562 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. [2022-07-12 10:26:01,565 INFO L132 encePairwiseOnDemand]: 237/246 looper letters, 46 selfloop transitions, 6 changer transitions 11/233 dead transitions. [2022-07-12 10:26:01,565 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 233 transitions, 806 flow [2022-07-12 10:26:01,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-12 10:26:01,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-07-12 10:26:01,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1586 transitions. [2022-07-12 10:26:01,568 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8058943089430894 [2022-07-12 10:26:01,568 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1586 transitions. [2022-07-12 10:26:01,569 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1586 transitions. [2022-07-12 10:26:01,569 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:26:01,569 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1586 transitions. [2022-07-12 10:26:01,579 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) [2022-07-12 10:26:01,580 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) [2022-07-12 10:26:01,580 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) [2022-07-12 10:26:01,580 INFO L186 Difference]: Start difference. First operand has 247 places, 225 transitions, 653 flow. Second operand 8 states and 1586 transitions. [2022-07-12 10:26:01,581 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 233 transitions, 806 flow [2022-07-12 10:26:01,583 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 233 transitions, 789 flow, removed 1 selfloop flow, removed 6 redundant places. [2022-07-12 10:26:01,585 INFO L242 Difference]: Finished difference. Result has 246 places, 220 transitions, 620 flow [2022-07-12 10:26:01,585 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} [2022-07-12 10:26:01,586 INFO L279 CegarLoopForPetriNet]: 217 programPoint places, 29 predicate places. [2022-07-12 10:26:01,586 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 220 transitions, 620 flow [2022-07-12 10:26:01,586 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) [2022-07-12 10:26:01,587 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:26:01,587 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] [2022-07-12 10:26:01,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-07-12 10:26:01,587 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:26:01,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:26:01,588 INFO L85 PathProgramCache]: Analyzing trace with hash -27324223, now seen corresponding path program 1 times [2022-07-12 10:26:01,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:26:01,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731014834] [2022-07-12 10:26:01,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:26:01,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:26:01,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:26:01,704 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 10:26:01,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:26:01,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731014834] [2022-07-12 10:26:01,705 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731014834] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:26:01,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234879761] [2022-07-12 10:26:01,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:26:01,705 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:26:01,705 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:26:01,706 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) [2022-07-12 10:26:01,720 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-12 10:26:01,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:26:01,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-12 10:26:01,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:26:02,065 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 10:26:02,065 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:26:02,300 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 10:26:02,300 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1234879761] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-12 10:26:02,300 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-12 10:26:02,300 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [13, 11] total 23 [2022-07-12 10:26:02,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150364839] [2022-07-12 10:26:02,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:26:02,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-12 10:26:02,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:26:02,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-12 10:26:02,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=383, Unknown=0, NotChecked=0, Total=506 [2022-07-12 10:26:02,303 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 189 out of 246 [2022-07-12 10:26:02,304 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) [2022-07-12 10:26:02,304 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:26:02,304 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 189 of 246 [2022-07-12 10:26:02,304 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:26:02,530 INFO L129 PetriNetUnfolder]: 115/797 cut-off events. [2022-07-12 10:26:02,531 INFO L130 PetriNetUnfolder]: For 366/396 co-relation queries the response was YES. [2022-07-12 10:26:02,533 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. [2022-07-12 10:26:02,535 INFO L132 encePairwiseOnDemand]: 232/246 looper letters, 48 selfloop transitions, 13 changer transitions 0/229 dead transitions. [2022-07-12 10:26:02,535 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 229 transitions, 788 flow [2022-07-12 10:26:02,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-12 10:26:02,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-07-12 10:26:02,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2512 transitions. [2022-07-12 10:26:02,537 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7854909318323953 [2022-07-12 10:26:02,537 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2512 transitions. [2022-07-12 10:26:02,537 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2512 transitions. [2022-07-12 10:26:02,538 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:26:02,538 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2512 transitions. [2022-07-12 10:26:02,540 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) [2022-07-12 10:26:02,542 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) [2022-07-12 10:26:02,542 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) [2022-07-12 10:26:02,542 INFO L186 Difference]: Start difference. First operand has 246 places, 220 transitions, 620 flow. Second operand 13 states and 2512 transitions. [2022-07-12 10:26:02,543 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 229 transitions, 788 flow [2022-07-12 10:26:02,545 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 229 transitions, 757 flow, removed 7 selfloop flow, removed 9 redundant places. [2022-07-12 10:26:02,547 INFO L242 Difference]: Finished difference. Result has 246 places, 221 transitions, 635 flow [2022-07-12 10:26:02,547 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} [2022-07-12 10:26:02,548 INFO L279 CegarLoopForPetriNet]: 217 programPoint places, 29 predicate places. [2022-07-12 10:26:02,548 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 221 transitions, 635 flow [2022-07-12 10:26:02,548 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) [2022-07-12 10:26:02,548 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:26:02,548 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] [2022-07-12 10:26:02,581 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-12 10:26:02,763 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 [2022-07-12 10:26:02,763 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:26:02,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:26:02,764 INFO L85 PathProgramCache]: Analyzing trace with hash 917365674, now seen corresponding path program 1 times [2022-07-12 10:26:02,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:26:02,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363389919] [2022-07-12 10:26:02,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:26:02,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:26:02,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:26:03,216 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 10:26:03,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:26:03,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363389919] [2022-07-12 10:26:03,216 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363389919] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:26:03,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2120965888] [2022-07-12 10:26:03,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:26:03,216 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:26:03,216 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:26:03,222 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) [2022-07-12 10:26:03,223 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-12 10:26:03,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:26:03,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 29 conjunts are in the unsatisfiable core [2022-07-12 10:26:03,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:26:04,441 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 10:26:04,441 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:26:05,174 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 10:26:05,174 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2120965888] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:26:05,175 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:26:05,175 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20, 20] total 46 [2022-07-12 10:26:05,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320682834] [2022-07-12 10:26:05,176 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:26:05,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-07-12 10:26:05,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:26:05,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-07-12 10:26:05,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=286, Invalid=1784, Unknown=0, NotChecked=0, Total=2070 [2022-07-12 10:26:05,183 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 246 [2022-07-12 10:26:05,185 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) [2022-07-12 10:26:05,185 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:26:05,185 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 246 [2022-07-12 10:26:05,186 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:26:07,230 INFO L129 PetriNetUnfolder]: 477/2901 cut-off events. [2022-07-12 10:26:07,231 INFO L130 PetriNetUnfolder]: For 1357/1480 co-relation queries the response was YES. [2022-07-12 10:26:07,241 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. [2022-07-12 10:26:07,248 INFO L132 encePairwiseOnDemand]: 222/246 looper letters, 255 selfloop transitions, 41 changer transitions 29/455 dead transitions. [2022-07-12 10:26:07,249 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 455 transitions, 2153 flow [2022-07-12 10:26:07,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-07-12 10:26:07,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2022-07-12 10:26:07,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 5680 transitions. [2022-07-12 10:26:07,253 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6413730803974707 [2022-07-12 10:26:07,253 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 5680 transitions. [2022-07-12 10:26:07,253 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 5680 transitions. [2022-07-12 10:26:07,254 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:26:07,254 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 5680 transitions. [2022-07-12 10:26:07,259 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) [2022-07-12 10:26:07,265 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) [2022-07-12 10:26:07,266 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) [2022-07-12 10:26:07,266 INFO L186 Difference]: Start difference. First operand has 246 places, 221 transitions, 635 flow. Second operand 36 states and 5680 transitions. [2022-07-12 10:26:07,267 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 455 transitions, 2153 flow [2022-07-12 10:26:07,272 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 455 transitions, 2109 flow, removed 0 selfloop flow, removed 11 redundant places. [2022-07-12 10:26:07,276 INFO L242 Difference]: Finished difference. Result has 286 places, 248 transitions, 897 flow [2022-07-12 10:26:07,276 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} [2022-07-12 10:26:07,277 INFO L279 CegarLoopForPetriNet]: 217 programPoint places, 69 predicate places. [2022-07-12 10:26:07,277 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 248 transitions, 897 flow [2022-07-12 10:26:07,278 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) [2022-07-12 10:26:07,278 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:26:07,278 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] [2022-07-12 10:26:07,313 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-12 10:26:07,491 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 [2022-07-12 10:26:07,492 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:26:07,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:26:07,492 INFO L85 PathProgramCache]: Analyzing trace with hash 1687266696, now seen corresponding path program 1 times [2022-07-12 10:26:07,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:26:07,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509408772] [2022-07-12 10:26:07,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:26:07,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:26:07,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:26:07,819 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 10:26:07,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:26:07,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509408772] [2022-07-12 10:26:07,819 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509408772] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:26:07,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011845821] [2022-07-12 10:26:07,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:26:07,820 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:26:07,820 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:26:07,836 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) [2022-07-12 10:26:07,873 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-12 10:26:07,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:26:07,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 33 conjunts are in the unsatisfiable core [2022-07-12 10:26:07,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:26:08,178 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-12 10:26:08,179 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 [2022-07-12 10:26:08,189 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 10:26:08,189 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:26:08,317 INFO L356 Elim1Store]: treesize reduction 42, result has 50.6 percent of original size [2022-07-12 10:26:08,317 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 [2022-07-12 10:26:08,347 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 10:26:08,347 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1011845821] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:26:08,347 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:26:08,347 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 14, 9] total 35 [2022-07-12 10:26:08,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753021796] [2022-07-12 10:26:08,347 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:26:08,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-07-12 10:26:08,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:26:08,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-07-12 10:26:08,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=1037, Unknown=0, NotChecked=0, Total=1190 [2022-07-12 10:26:08,350 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 246 [2022-07-12 10:26:08,353 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) [2022-07-12 10:26:08,353 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:26:08,353 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 246 [2022-07-12 10:26:08,353 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:26:13,004 INFO L129 PetriNetUnfolder]: 12554/30403 cut-off events. [2022-07-12 10:26:13,004 INFO L130 PetriNetUnfolder]: For 15882/16122 co-relation queries the response was YES. [2022-07-12 10:26:13,181 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. [2022-07-12 10:26:13,290 INFO L132 encePairwiseOnDemand]: 214/246 looper letters, 353 selfloop transitions, 93 changer transitions 0/624 dead transitions. [2022-07-12 10:26:13,290 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 624 transitions, 2996 flow [2022-07-12 10:26:13,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-07-12 10:26:13,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2022-07-12 10:26:13,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 6567 transitions. [2022-07-12 10:26:13,296 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7415311653116531 [2022-07-12 10:26:13,296 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 6567 transitions. [2022-07-12 10:26:13,296 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 6567 transitions. [2022-07-12 10:26:13,298 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:26:13,298 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 6567 transitions. [2022-07-12 10:26:13,305 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) [2022-07-12 10:26:13,309 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) [2022-07-12 10:26:13,309 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) [2022-07-12 10:26:13,310 INFO L186 Difference]: Start difference. First operand has 286 places, 248 transitions, 897 flow. Second operand 36 states and 6567 transitions. [2022-07-12 10:26:13,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 624 transitions, 2996 flow [2022-07-12 10:26:13,368 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 624 transitions, 2957 flow, removed 11 selfloop flow, removed 11 redundant places. [2022-07-12 10:26:13,372 INFO L242 Difference]: Finished difference. Result has 330 places, 325 transitions, 1588 flow [2022-07-12 10:26:13,373 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} [2022-07-12 10:26:13,373 INFO L279 CegarLoopForPetriNet]: 217 programPoint places, 113 predicate places. [2022-07-12 10:26:13,373 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 325 transitions, 1588 flow [2022-07-12 10:26:13,374 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) [2022-07-12 10:26:13,374 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:26:13,374 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] [2022-07-12 10:26:13,391 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-07-12 10:26:13,587 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 [2022-07-12 10:26:13,588 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:26:13,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:26:13,588 INFO L85 PathProgramCache]: Analyzing trace with hash -387447628, now seen corresponding path program 2 times [2022-07-12 10:26:13,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:26:13,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322059068] [2022-07-12 10:26:13,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:26:13,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:26:13,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:26:13,872 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 10:26:13,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:26:13,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322059068] [2022-07-12 10:26:13,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322059068] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:26:13,873 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:26:13,873 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-07-12 10:26:13,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087765248] [2022-07-12 10:26:13,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:26:13,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-12 10:26:13,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:26:13,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-12 10:26:13,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2022-07-12 10:26:13,875 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 246 [2022-07-12 10:26:13,876 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) [2022-07-12 10:26:13,876 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:26:13,876 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 246 [2022-07-12 10:26:13,876 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:26:20,486 INFO L129 PetriNetUnfolder]: 15248/38698 cut-off events. [2022-07-12 10:26:20,486 INFO L130 PetriNetUnfolder]: For 77482/77997 co-relation queries the response was YES. [2022-07-12 10:26:20,943 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. [2022-07-12 10:26:21,055 INFO L132 encePairwiseOnDemand]: 216/246 looper letters, 270 selfloop transitions, 122 changer transitions 0/570 dead transitions. [2022-07-12 10:26:21,055 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 570 transitions, 3750 flow [2022-07-12 10:26:21,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-12 10:26:21,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2022-07-12 10:26:21,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 4693 transitions. [2022-07-12 10:26:21,059 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.733739837398374 [2022-07-12 10:26:21,059 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 4693 transitions. [2022-07-12 10:26:21,059 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 4693 transitions. [2022-07-12 10:26:21,060 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:26:21,060 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 4693 transitions. [2022-07-12 10:26:21,064 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) [2022-07-12 10:26:21,071 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) [2022-07-12 10:26:21,071 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) [2022-07-12 10:26:21,071 INFO L186 Difference]: Start difference. First operand has 330 places, 325 transitions, 1588 flow. Second operand 26 states and 4693 transitions. [2022-07-12 10:26:21,071 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 570 transitions, 3750 flow [2022-07-12 10:26:21,608 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 570 transitions, 3719 flow, removed 2 selfloop flow, removed 8 redundant places. [2022-07-12 10:26:21,613 INFO L242 Difference]: Finished difference. Result has 360 places, 405 transitions, 2700 flow [2022-07-12 10:26:21,614 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} [2022-07-12 10:26:21,614 INFO L279 CegarLoopForPetriNet]: 217 programPoint places, 143 predicate places. [2022-07-12 10:26:21,614 INFO L495 AbstractCegarLoop]: Abstraction has has 360 places, 405 transitions, 2700 flow [2022-07-12 10:26:21,615 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) [2022-07-12 10:26:21,615 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:26:21,615 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] [2022-07-12 10:26:21,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-07-12 10:26:21,615 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:26:21,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:26:21,616 INFO L85 PathProgramCache]: Analyzing trace with hash -969848734, now seen corresponding path program 3 times [2022-07-12 10:26:21,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:26:21,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786647814] [2022-07-12 10:26:21,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:26:21,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:26:21,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:26:21,917 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 10:26:21,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:26:21,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786647814] [2022-07-12 10:26:21,918 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786647814] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:26:21,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081550715] [2022-07-12 10:26:21,918 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 10:26:21,918 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:26:21,918 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:26:21,919 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) [2022-07-12 10:26:21,920 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-12 10:26:22,020 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-07-12 10:26:22,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 10:26:22,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 52 conjunts are in the unsatisfiable core [2022-07-12 10:26:22,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:26:22,390 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 [2022-07-12 10:26:22,517 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 [2022-07-12 10:26:22,556 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 [2022-07-12 10:26:22,884 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-12 10:26:22,884 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 [2022-07-12 10:26:22,903 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 10:26:22,903 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:26:24,300 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 10:26:24,300 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2081550715] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:26:24,300 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:26:24,300 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 27, 12] total 51 [2022-07-12 10:26:24,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510339254] [2022-07-12 10:26:24,300 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:26:24,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-07-12 10:26:24,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:26:24,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-07-12 10:26:24,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=2289, Unknown=2, NotChecked=0, Total=2550 [2022-07-12 10:26:24,305 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 246 [2022-07-12 10:26:24,308 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) [2022-07-12 10:26:24,308 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:26:24,308 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 246 [2022-07-12 10:26:24,308 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:26:37,790 INFO L129 PetriNetUnfolder]: 27351/64136 cut-off events. [2022-07-12 10:26:37,791 INFO L130 PetriNetUnfolder]: For 188030/189408 co-relation queries the response was YES. [2022-07-12 10:26:38,912 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. [2022-07-12 10:26:39,133 INFO L132 encePairwiseOnDemand]: 207/246 looper letters, 544 selfloop transitions, 178 changer transitions 0/865 dead transitions. [2022-07-12 10:26:39,133 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 403 places, 865 transitions, 7017 flow [2022-07-12 10:26:39,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-07-12 10:26:39,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2022-07-12 10:26:39,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 7077 transitions. [2022-07-12 10:26:39,139 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6538248337028825 [2022-07-12 10:26:39,139 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 7077 transitions. [2022-07-12 10:26:39,139 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 7077 transitions. [2022-07-12 10:26:39,140 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:26:39,140 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 7077 transitions. [2022-07-12 10:26:39,145 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) [2022-07-12 10:26:39,151 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) [2022-07-12 10:26:39,152 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) [2022-07-12 10:26:39,152 INFO L186 Difference]: Start difference. First operand has 360 places, 405 transitions, 2700 flow. Second operand 44 states and 7077 transitions. [2022-07-12 10:26:39,152 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 403 places, 865 transitions, 7017 flow [2022-07-12 10:26:41,391 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 395 places, 865 transitions, 6738 flow, removed 126 selfloop flow, removed 8 redundant places. [2022-07-12 10:26:41,398 INFO L242 Difference]: Finished difference. Result has 421 places, 499 transitions, 4006 flow [2022-07-12 10:26:41,399 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} [2022-07-12 10:26:41,399 INFO L279 CegarLoopForPetriNet]: 217 programPoint places, 204 predicate places. [2022-07-12 10:26:41,399 INFO L495 AbstractCegarLoop]: Abstraction has has 421 places, 499 transitions, 4006 flow [2022-07-12 10:26:41,400 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) [2022-07-12 10:26:41,400 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:26:41,401 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] [2022-07-12 10:26:41,417 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-12 10:26:41,609 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 [2022-07-12 10:26:41,609 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-12 10:26:41,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:26:41,611 INFO L85 PathProgramCache]: Analyzing trace with hash 1645466800, now seen corresponding path program 1 times [2022-07-12 10:26:41,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:26:41,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121344989] [2022-07-12 10:26:41,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:26:41,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:26:41,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:26:41,922 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 10:26:41,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:26:41,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121344989] [2022-07-12 10:26:41,922 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121344989] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 10:26:41,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336462157] [2022-07-12 10:26:41,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:26:41,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 10:26:41,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:26:41,924 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) [2022-07-12 10:26:41,927 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-12 10:26:42,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:26:42,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 31 conjunts are in the unsatisfiable core [2022-07-12 10:26:42,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 10:26:42,138 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-12 10:26:42,138 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 [2022-07-12 10:26:42,149 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 10:26:42,149 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 10:26:42,254 INFO L356 Elim1Store]: treesize reduction 42, result has 50.6 percent of original size [2022-07-12 10:26:42,255 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 [2022-07-12 10:26:42,289 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 10:26:42,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1336462157] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 10:26:42,290 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 10:26:42,290 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 9, 9] total 31 [2022-07-12 10:26:42,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400918879] [2022-07-12 10:26:42,290 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 10:26:42,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-07-12 10:26:42,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:26:42,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-07-12 10:26:42,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=812, Unknown=0, NotChecked=0, Total=930 [2022-07-12 10:26:42,293 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 246 [2022-07-12 10:26:42,295 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) [2022-07-12 10:26:42,295 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:26:42,295 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 246 [2022-07-12 10:26:42,295 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand