./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/unroll-3.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/weaver/unroll-3.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 199b95a7803e428766b942c5c5c486b02a8ea32baf687cdef6ce754bef283884 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-31 04:07:35,229 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-31 04:07:35,232 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-31 04:07:35,277 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-31 04:07:35,277 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-31 04:07:35,280 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-31 04:07:35,282 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-31 04:07:35,285 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-31 04:07:35,287 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-31 04:07:35,291 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-31 04:07:35,292 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-31 04:07:35,294 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-31 04:07:35,295 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-31 04:07:35,296 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-31 04:07:35,298 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-31 04:07:35,302 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-31 04:07:35,303 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-31 04:07:35,309 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-31 04:07:35,310 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-31 04:07:35,317 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-31 04:07:35,318 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-31 04:07:35,319 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-31 04:07:35,320 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-31 04:07:35,320 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-31 04:07:35,327 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-31 04:07:35,327 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-31 04:07:35,327 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-31 04:07:35,329 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-31 04:07:35,329 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-31 04:07:35,330 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-31 04:07:35,330 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-31 04:07:35,332 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-31 04:07:35,333 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-31 04:07:35,334 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-31 04:07:35,335 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-31 04:07:35,335 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-31 04:07:35,336 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-31 04:07:35,336 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-31 04:07:35,336 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-31 04:07:35,337 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-31 04:07:35,338 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-31 04:07:35,339 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-31 04:07:35,372 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-31 04:07:35,372 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-31 04:07:35,373 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-31 04:07:35,373 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-31 04:07:35,374 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-31 04:07:35,374 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-31 04:07:35,375 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-31 04:07:35,375 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-31 04:07:35,375 INFO L138 SettingsManager]: * Use SBE=true [2023-08-31 04:07:35,376 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-31 04:07:35,377 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-31 04:07:35,377 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-31 04:07:35,377 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-31 04:07:35,377 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-31 04:07:35,377 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-31 04:07:35,378 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-31 04:07:35,378 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-31 04:07:35,378 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-31 04:07:35,378 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-31 04:07:35,378 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-31 04:07:35,379 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-31 04:07:35,379 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-31 04:07:35,379 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-31 04:07:35,379 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-31 04:07:35,379 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 04:07:35,380 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-31 04:07:35,380 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-31 04:07:35,380 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-31 04:07:35,380 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-31 04:07:35,380 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-31 04:07:35,381 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-31 04:07:35,381 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-31 04:07:35,381 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-31 04:07:35,381 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-31 04:07:35,381 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-31 04:07:35,382 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 199b95a7803e428766b942c5c5c486b02a8ea32baf687cdef6ce754bef283884 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-31 04:07:35,685 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-31 04:07:35,704 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-31 04:07:35,707 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-31 04:07:35,708 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-31 04:07:35,708 INFO L275 PluginConnector]: CDTParser initialized [2023-08-31 04:07:35,710 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/unroll-3.wvr.c [2023-08-31 04:07:36,936 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-31 04:07:37,148 INFO L351 CDTParser]: Found 1 translation units. [2023-08-31 04:07:37,149 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/unroll-3.wvr.c [2023-08-31 04:07:37,159 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1bd3ecf2b/7af7d5c4105b4a78904b4da4ff54e669/FLAGba5b05a10 [2023-08-31 04:07:37,172 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1bd3ecf2b/7af7d5c4105b4a78904b4da4ff54e669 [2023-08-31 04:07:37,174 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-31 04:07:37,175 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-31 04:07:37,181 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-31 04:07:37,181 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-31 04:07:37,184 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-31 04:07:37,185 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 04:07:37" (1/1) ... [2023-08-31 04:07:37,186 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@556fd47d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 04:07:37, skipping insertion in model container [2023-08-31 04:07:37,186 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 04:07:37" (1/1) ... [2023-08-31 04:07:37,191 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-31 04:07:37,212 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-31 04:07:37,348 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/unroll-3.wvr.c[2500,2513] [2023-08-31 04:07:37,356 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 04:07:37,363 INFO L203 MainTranslator]: Completed pre-run [2023-08-31 04:07:37,382 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/unroll-3.wvr.c[2500,2513] [2023-08-31 04:07:37,385 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 04:07:37,397 INFO L208 MainTranslator]: Completed translation [2023-08-31 04:07:37,398 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 04:07:37 WrapperNode [2023-08-31 04:07:37,398 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-31 04:07:37,399 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-31 04:07:37,399 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-31 04:07:37,400 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-31 04:07:37,405 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 04:07:37" (1/1) ... [2023-08-31 04:07:37,420 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 04:07:37" (1/1) ... [2023-08-31 04:07:37,452 INFO L138 Inliner]: procedures = 24, calls = 34, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 147 [2023-08-31 04:07:37,453 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-31 04:07:37,454 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-31 04:07:37,454 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-31 04:07:37,455 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-31 04:07:37,462 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 04:07:37" (1/1) ... [2023-08-31 04:07:37,463 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 04:07:37" (1/1) ... [2023-08-31 04:07:37,467 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 04:07:37" (1/1) ... [2023-08-31 04:07:37,468 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 04:07:37" (1/1) ... [2023-08-31 04:07:37,483 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 04:07:37" (1/1) ... [2023-08-31 04:07:37,491 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 04:07:37" (1/1) ... [2023-08-31 04:07:37,496 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 04:07:37" (1/1) ... [2023-08-31 04:07:37,498 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 04:07:37" (1/1) ... [2023-08-31 04:07:37,500 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-31 04:07:37,502 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-31 04:07:37,503 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-31 04:07:37,503 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-31 04:07:37,505 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 04:07:37" (1/1) ... [2023-08-31 04:07:37,511 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 04:07:37,522 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:07:37,534 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-31 04:07:37,564 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-31 04:07:37,578 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-31 04:07:37,578 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-31 04:07:37,578 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-31 04:07:37,579 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-31 04:07:37,579 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-31 04:07:37,579 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-31 04:07:37,579 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-31 04:07:37,579 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-31 04:07:37,579 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-31 04:07:37,579 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-31 04:07:37,580 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-31 04:07:37,580 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-31 04:07:37,580 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-31 04:07:37,581 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-31 04:07:37,695 INFO L236 CfgBuilder]: Building ICFG [2023-08-31 04:07:37,697 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-31 04:07:37,966 INFO L277 CfgBuilder]: Performing block encoding [2023-08-31 04:07:37,974 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-31 04:07:37,974 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-31 04:07:37,976 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 04:07:37 BoogieIcfgContainer [2023-08-31 04:07:37,976 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-31 04:07:37,978 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-31 04:07:37,978 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-31 04:07:37,981 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-31 04:07:37,981 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.08 04:07:37" (1/3) ... [2023-08-31 04:07:37,982 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b6c314c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 04:07:37, skipping insertion in model container [2023-08-31 04:07:37,982 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 04:07:37" (2/3) ... [2023-08-31 04:07:37,982 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b6c314c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 04:07:37, skipping insertion in model container [2023-08-31 04:07:37,982 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 04:07:37" (3/3) ... [2023-08-31 04:07:37,983 INFO L112 eAbstractionObserver]: Analyzing ICFG unroll-3.wvr.c [2023-08-31 04:07:37,990 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-31 04:07:37,997 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-31 04:07:37,998 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-31 04:07:37,998 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-31 04:07:38,097 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-31 04:07:38,145 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 162 places, 170 transitions, 356 flow [2023-08-31 04:07:38,242 INFO L130 PetriNetUnfolder]: 15/168 cut-off events. [2023-08-31 04:07:38,242 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-31 04:07:38,249 INFO L83 FinitePrefix]: Finished finitePrefix Result has 177 conditions, 168 events. 15/168 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 167 event pairs, 0 based on Foata normal form. 0/152 useless extension candidates. Maximal degree in co-relation 100. Up to 2 conditions per place. [2023-08-31 04:07:38,249 INFO L82 GeneralOperation]: Start removeDead. Operand has 162 places, 170 transitions, 356 flow [2023-08-31 04:07:38,256 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 152 places, 160 transitions, 332 flow [2023-08-31 04:07:38,259 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 04:07:38,267 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 152 places, 160 transitions, 332 flow [2023-08-31 04:07:38,270 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 152 places, 160 transitions, 332 flow [2023-08-31 04:07:38,270 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 152 places, 160 transitions, 332 flow [2023-08-31 04:07:38,304 INFO L130 PetriNetUnfolder]: 15/160 cut-off events. [2023-08-31 04:07:38,305 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-31 04:07:38,306 INFO L83 FinitePrefix]: Finished finitePrefix Result has 169 conditions, 160 events. 15/160 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 148 event pairs, 0 based on Foata normal form. 0/145 useless extension candidates. Maximal degree in co-relation 100. Up to 2 conditions per place. [2023-08-31 04:07:38,308 INFO L119 LiptonReduction]: Number of co-enabled transitions 2592 [2023-08-31 04:07:42,978 INFO L134 LiptonReduction]: Checked pairs total: 2630 [2023-08-31 04:07:42,979 INFO L136 LiptonReduction]: Total number of compositions: 185 [2023-08-31 04:07:42,992 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-31 04:07:42,998 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@26213cb5, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 04:07:42,998 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-31 04:07:43,003 INFO L130 PetriNetUnfolder]: 3/16 cut-off events. [2023-08-31 04:07:43,003 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-31 04:07:43,003 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:07:43,004 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:07:43,004 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:07:43,008 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:07:43,009 INFO L85 PathProgramCache]: Analyzing trace with hash 1588788240, now seen corresponding path program 1 times [2023-08-31 04:07:43,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:07:43,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544689759] [2023-08-31 04:07:43,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:07:43,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:07:43,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:07:43,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 04:07:43,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:07:43,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544689759] [2023-08-31 04:07:43,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544689759] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 04:07:43,453 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 04:07:43,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-31 04:07:43,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079464413] [2023-08-31 04:07:43,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 04:07:43,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 04:07:43,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:07:43,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 04:07:43,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 04:07:43,515 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 355 [2023-08-31 04:07:43,521 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 17 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 153.0) internal successors, (459), 3 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:07:43,521 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:07:43,521 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 355 [2023-08-31 04:07:43,522 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:07:43,580 INFO L130 PetriNetUnfolder]: 45/80 cut-off events. [2023-08-31 04:07:43,581 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-08-31 04:07:43,582 INFO L83 FinitePrefix]: Finished finitePrefix Result has 172 conditions, 80 events. 45/80 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 188 event pairs, 18 based on Foata normal form. 0/50 useless extension candidates. Maximal degree in co-relation 120. Up to 76 conditions per place. [2023-08-31 04:07:43,584 INFO L137 encePairwiseOnDemand]: 352/355 looper letters, 14 selfloop transitions, 2 changer transitions 0/18 dead transitions. [2023-08-31 04:07:43,584 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 18 transitions, 80 flow [2023-08-31 04:07:43,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 04:07:43,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 04:07:43,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 464 transitions. [2023-08-31 04:07:43,604 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4356807511737089 [2023-08-31 04:07:43,605 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 464 transitions. [2023-08-31 04:07:43,606 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 464 transitions. [2023-08-31 04:07:43,610 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:07:43,612 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 464 transitions. [2023-08-31 04:07:43,617 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 154.66666666666666) internal successors, (464), 3 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:07:43,623 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 355.0) internal successors, (1420), 4 states have internal predecessors, (1420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:07:43,624 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 355.0) internal successors, (1420), 4 states have internal predecessors, (1420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:07:43,626 INFO L175 Difference]: Start difference. First operand has 21 places, 17 transitions, 46 flow. Second operand 3 states and 464 transitions. [2023-08-31 04:07:43,627 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 18 transitions, 80 flow [2023-08-31 04:07:43,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 18 transitions, 72 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-31 04:07:43,630 INFO L231 Difference]: Finished difference. Result has 20 places, 18 transitions, 50 flow [2023-08-31 04:07:43,632 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=50, PETRI_PLACES=20, PETRI_TRANSITIONS=18} [2023-08-31 04:07:43,635 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, -1 predicate places. [2023-08-31 04:07:43,635 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 18 transitions, 50 flow [2023-08-31 04:07:43,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 153.0) internal successors, (459), 3 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:07:43,636 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:07:43,636 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:07:43,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-31 04:07:43,637 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:07:43,640 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:07:43,641 INFO L85 PathProgramCache]: Analyzing trace with hash -300848525, now seen corresponding path program 1 times [2023-08-31 04:07:43,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:07:43,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458414797] [2023-08-31 04:07:43,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:07:43,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:07:43,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:07:43,864 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 04:07:43,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:07:43,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458414797] [2023-08-31 04:07:43,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458414797] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 04:07:43,865 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 04:07:43,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-31 04:07:43,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502491360] [2023-08-31 04:07:43,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 04:07:43,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 04:07:43,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:07:43,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 04:07:43,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 04:07:43,893 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 355 [2023-08-31 04:07:43,894 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 18 transitions, 50 flow. Second operand has 3 states, 3 states have (on average 151.33333333333334) internal successors, (454), 3 states have internal predecessors, (454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:07:43,894 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:07:43,894 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 355 [2023-08-31 04:07:43,894 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:07:43,935 INFO L130 PetriNetUnfolder]: 66/117 cut-off events. [2023-08-31 04:07:43,935 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-31 04:07:43,935 INFO L83 FinitePrefix]: Finished finitePrefix Result has 245 conditions, 117 events. 66/117 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 315 event pairs, 9 based on Foata normal form. 1/77 useless extension candidates. Maximal degree in co-relation 234. Up to 85 conditions per place. [2023-08-31 04:07:43,936 INFO L137 encePairwiseOnDemand]: 351/355 looper letters, 22 selfloop transitions, 3 changer transitions 1/28 dead transitions. [2023-08-31 04:07:43,936 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 28 transitions, 125 flow [2023-08-31 04:07:43,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 04:07:43,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 04:07:43,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 467 transitions. [2023-08-31 04:07:43,938 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4384976525821596 [2023-08-31 04:07:43,938 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 467 transitions. [2023-08-31 04:07:43,939 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 467 transitions. [2023-08-31 04:07:43,939 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:07:43,939 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 467 transitions. [2023-08-31 04:07:43,940 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 155.66666666666666) internal successors, (467), 3 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:07:43,942 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 355.0) internal successors, (1420), 4 states have internal predecessors, (1420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:07:43,943 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 355.0) internal successors, (1420), 4 states have internal predecessors, (1420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:07:43,943 INFO L175 Difference]: Start difference. First operand has 20 places, 18 transitions, 50 flow. Second operand 3 states and 467 transitions. [2023-08-31 04:07:43,943 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 28 transitions, 125 flow [2023-08-31 04:07:43,944 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 28 transitions, 121 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-31 04:07:43,944 INFO L231 Difference]: Finished difference. Result has 22 places, 20 transitions, 65 flow [2023-08-31 04:07:43,945 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=65, PETRI_PLACES=22, PETRI_TRANSITIONS=20} [2023-08-31 04:07:43,945 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 1 predicate places. [2023-08-31 04:07:43,946 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 20 transitions, 65 flow [2023-08-31 04:07:43,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 151.33333333333334) internal successors, (454), 3 states have internal predecessors, (454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:07:43,946 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:07:43,946 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:07:43,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-31 04:07:43,947 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:07:43,947 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:07:43,947 INFO L85 PathProgramCache]: Analyzing trace with hash 1190840402, now seen corresponding path program 1 times [2023-08-31 04:07:43,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:07:43,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153381643] [2023-08-31 04:07:43,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:07:43,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:07:43,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:07:44,111 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 04:07:44,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:07:44,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153381643] [2023-08-31 04:07:44,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153381643] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 04:07:44,113 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 04:07:44,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-31 04:07:44,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179490498] [2023-08-31 04:07:44,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 04:07:44,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-31 04:07:44,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:07:44,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-31 04:07:44,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-31 04:07:44,163 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 355 [2023-08-31 04:07:44,164 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 20 transitions, 65 flow. Second operand has 5 states, 5 states have (on average 145.2) internal successors, (726), 5 states have internal predecessors, (726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:07:44,164 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:07:44,164 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 355 [2023-08-31 04:07:44,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:07:44,297 INFO L130 PetriNetUnfolder]: 85/170 cut-off events. [2023-08-31 04:07:44,298 INFO L131 PetriNetUnfolder]: For 25/25 co-relation queries the response was YES. [2023-08-31 04:07:44,298 INFO L83 FinitePrefix]: Finished finitePrefix Result has 403 conditions, 170 events. 85/170 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 568 event pairs, 26 based on Foata normal form. 12/181 useless extension candidates. Maximal degree in co-relation 386. Up to 87 conditions per place. [2023-08-31 04:07:44,299 INFO L137 encePairwiseOnDemand]: 350/355 looper letters, 31 selfloop transitions, 4 changer transitions 8/43 dead transitions. [2023-08-31 04:07:44,299 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 43 transitions, 212 flow [2023-08-31 04:07:44,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-31 04:07:44,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-31 04:07:44,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 751 transitions. [2023-08-31 04:07:44,302 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4230985915492958 [2023-08-31 04:07:44,302 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 751 transitions. [2023-08-31 04:07:44,302 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 751 transitions. [2023-08-31 04:07:44,303 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:07:44,303 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 751 transitions. [2023-08-31 04:07:44,304 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 150.2) internal successors, (751), 5 states have internal predecessors, (751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:07:44,307 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 355.0) internal successors, (2130), 6 states have internal predecessors, (2130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:07:44,308 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 355.0) internal successors, (2130), 6 states have internal predecessors, (2130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:07:44,308 INFO L175 Difference]: Start difference. First operand has 22 places, 20 transitions, 65 flow. Second operand 5 states and 751 transitions. [2023-08-31 04:07:44,308 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 43 transitions, 212 flow [2023-08-31 04:07:44,309 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 43 transitions, 208 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-31 04:07:44,310 INFO L231 Difference]: Finished difference. Result has 28 places, 22 transitions, 93 flow [2023-08-31 04:07:44,310 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=93, PETRI_PLACES=28, PETRI_TRANSITIONS=22} [2023-08-31 04:07:44,311 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 7 predicate places. [2023-08-31 04:07:44,311 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 22 transitions, 93 flow [2023-08-31 04:07:44,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 145.2) internal successors, (726), 5 states have internal predecessors, (726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:07:44,312 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:07:44,312 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:07:44,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-31 04:07:44,313 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:07:44,313 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:07:44,313 INFO L85 PathProgramCache]: Analyzing trace with hash -1541576124, now seen corresponding path program 2 times [2023-08-31 04:07:44,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:07:44,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017077385] [2023-08-31 04:07:44,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:07:44,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:07:44,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:07:44,439 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 04:07:44,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:07:44,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017077385] [2023-08-31 04:07:44,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017077385] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 04:07:44,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2129911699] [2023-08-31 04:07:44,440 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 04:07:44,441 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:07:44,441 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:07:44,445 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) [2023-08-31 04:07:44,481 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-31 04:07:44,552 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 04:07:44,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 04:07:44,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-31 04:07:44,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 04:07:44,658 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 04:07:44,658 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 04:07:44,717 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 04:07:44,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2129911699] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-31 04:07:44,732 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-31 04:07:44,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 5] total 6 [2023-08-31 04:07:44,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682901526] [2023-08-31 04:07:44,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 04:07:44,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-31 04:07:44,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:07:44,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-31 04:07:44,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-08-31 04:07:44,799 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 355 [2023-08-31 04:07:44,799 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 22 transitions, 93 flow. Second operand has 4 states, 4 states have (on average 149.75) internal successors, (599), 4 states have internal predecessors, (599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:07:44,800 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:07:44,800 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 355 [2023-08-31 04:07:44,800 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:07:44,890 INFO L130 PetriNetUnfolder]: 85/163 cut-off events. [2023-08-31 04:07:44,891 INFO L131 PetriNetUnfolder]: For 133/144 co-relation queries the response was YES. [2023-08-31 04:07:44,892 INFO L83 FinitePrefix]: Finished finitePrefix Result has 494 conditions, 163 events. 85/163 cut-off events. For 133/144 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 513 event pairs, 24 based on Foata normal form. 7/168 useless extension candidates. Maximal degree in co-relation 474. Up to 104 conditions per place. [2023-08-31 04:07:44,893 INFO L137 encePairwiseOnDemand]: 351/355 looper letters, 26 selfloop transitions, 4 changer transitions 4/35 dead transitions. [2023-08-31 04:07:44,893 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 35 transitions, 206 flow [2023-08-31 04:07:44,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-31 04:07:44,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-31 04:07:44,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 616 transitions. [2023-08-31 04:07:44,895 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43380281690140843 [2023-08-31 04:07:44,895 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 616 transitions. [2023-08-31 04:07:44,895 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 616 transitions. [2023-08-31 04:07:44,896 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:07:44,896 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 616 transitions. [2023-08-31 04:07:44,897 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 154.0) internal successors, (616), 4 states have internal predecessors, (616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:07:44,900 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 355.0) internal successors, (1775), 5 states have internal predecessors, (1775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:07:44,901 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 355.0) internal successors, (1775), 5 states have internal predecessors, (1775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:07:44,901 INFO L175 Difference]: Start difference. First operand has 28 places, 22 transitions, 93 flow. Second operand 4 states and 616 transitions. [2023-08-31 04:07:44,901 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 35 transitions, 206 flow [2023-08-31 04:07:44,902 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 35 transitions, 193 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-08-31 04:07:44,903 INFO L231 Difference]: Finished difference. Result has 30 places, 24 transitions, 112 flow [2023-08-31 04:07:44,903 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=112, PETRI_PLACES=30, PETRI_TRANSITIONS=24} [2023-08-31 04:07:44,904 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 9 predicate places. [2023-08-31 04:07:44,904 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 24 transitions, 112 flow [2023-08-31 04:07:44,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 149.75) internal successors, (599), 4 states have internal predecessors, (599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:07:44,905 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:07:44,905 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:07:44,914 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-31 04:07:45,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:07:45,110 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:07:45,111 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:07:45,111 INFO L85 PathProgramCache]: Analyzing trace with hash -688555301, now seen corresponding path program 1 times [2023-08-31 04:07:45,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:07:45,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554231407] [2023-08-31 04:07:45,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:07:45,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:07:45,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:07:45,256 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 04:07:45,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:07:45,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554231407] [2023-08-31 04:07:45,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554231407] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 04:07:45,258 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 04:07:45,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-31 04:07:45,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644684514] [2023-08-31 04:07:45,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 04:07:45,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-31 04:07:45,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:07:45,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-31 04:07:45,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-31 04:07:45,310 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 355 [2023-08-31 04:07:45,311 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 24 transitions, 112 flow. Second operand has 5 states, 5 states have (on average 144.2) internal successors, (721), 5 states have internal predecessors, (721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:07:45,312 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:07:45,312 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 355 [2023-08-31 04:07:45,312 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:07:45,428 INFO L130 PetriNetUnfolder]: 95/188 cut-off events. [2023-08-31 04:07:45,428 INFO L131 PetriNetUnfolder]: For 211/211 co-relation queries the response was YES. [2023-08-31 04:07:45,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 589 conditions, 188 events. 95/188 cut-off events. For 211/211 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 634 event pairs, 28 based on Foata normal form. 2/189 useless extension candidates. Maximal degree in co-relation 568. Up to 93 conditions per place. [2023-08-31 04:07:45,430 INFO L137 encePairwiseOnDemand]: 349/355 looper letters, 31 selfloop transitions, 9 changer transitions 10/50 dead transitions. [2023-08-31 04:07:45,430 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 50 transitions, 309 flow [2023-08-31 04:07:45,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-31 04:07:45,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-31 04:07:45,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 891 transitions. [2023-08-31 04:07:45,433 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4183098591549296 [2023-08-31 04:07:45,433 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 891 transitions. [2023-08-31 04:07:45,433 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 891 transitions. [2023-08-31 04:07:45,434 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:07:45,434 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 891 transitions. [2023-08-31 04:07:45,436 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 148.5) internal successors, (891), 6 states have internal predecessors, (891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:07:45,439 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 355.0) internal successors, (2485), 7 states have internal predecessors, (2485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:07:45,440 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 355.0) internal successors, (2485), 7 states have internal predecessors, (2485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:07:45,440 INFO L175 Difference]: Start difference. First operand has 30 places, 24 transitions, 112 flow. Second operand 6 states and 891 transitions. [2023-08-31 04:07:45,440 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 50 transitions, 309 flow [2023-08-31 04:07:45,442 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 50 transitions, 304 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-31 04:07:45,443 INFO L231 Difference]: Finished difference. Result has 36 places, 27 transitions, 163 flow [2023-08-31 04:07:45,443 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=163, PETRI_PLACES=36, PETRI_TRANSITIONS=27} [2023-08-31 04:07:45,444 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 15 predicate places. [2023-08-31 04:07:45,444 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 27 transitions, 163 flow [2023-08-31 04:07:45,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 144.2) internal successors, (721), 5 states have internal predecessors, (721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:07:45,444 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:07:45,445 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:07:45,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-31 04:07:45,445 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:07:45,445 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:07:45,446 INFO L85 PathProgramCache]: Analyzing trace with hash -1929012174, now seen corresponding path program 3 times [2023-08-31 04:07:45,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:07:45,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540970368] [2023-08-31 04:07:45,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:07:45,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:07:45,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:07:45,529 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 04:07:45,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:07:45,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540970368] [2023-08-31 04:07:45,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540970368] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 04:07:45,530 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 04:07:45,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-31 04:07:45,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654239054] [2023-08-31 04:07:45,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 04:07:45,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-31 04:07:45,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:07:45,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-31 04:07:45,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-31 04:07:45,549 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 355 [2023-08-31 04:07:45,550 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 27 transitions, 163 flow. Second operand has 4 states, 4 states have (on average 149.75) internal successors, (599), 4 states have internal predecessors, (599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:07:45,550 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:07:45,550 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 355 [2023-08-31 04:07:45,550 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:07:45,608 INFO L130 PetriNetUnfolder]: 88/163 cut-off events. [2023-08-31 04:07:45,608 INFO L131 PetriNetUnfolder]: For 349/352 co-relation queries the response was YES. [2023-08-31 04:07:45,609 INFO L83 FinitePrefix]: Finished finitePrefix Result has 642 conditions, 163 events. 88/163 cut-off events. For 349/352 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 511 event pairs, 22 based on Foata normal form. 4/159 useless extension candidates. Maximal degree in co-relation 619. Up to 95 conditions per place. [2023-08-31 04:07:45,610 INFO L137 encePairwiseOnDemand]: 351/355 looper letters, 24 selfloop transitions, 10 changer transitions 4/40 dead transitions. [2023-08-31 04:07:45,610 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 40 transitions, 297 flow [2023-08-31 04:07:45,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-31 04:07:45,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-31 04:07:45,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 615 transitions. [2023-08-31 04:07:45,612 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43309859154929575 [2023-08-31 04:07:45,612 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 615 transitions. [2023-08-31 04:07:45,613 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 615 transitions. [2023-08-31 04:07:45,613 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:07:45,613 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 615 transitions. [2023-08-31 04:07:45,614 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 153.75) internal successors, (615), 4 states have internal predecessors, (615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:07:45,616 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 355.0) internal successors, (1775), 5 states have internal predecessors, (1775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:07:45,617 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 355.0) internal successors, (1775), 5 states have internal predecessors, (1775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:07:45,617 INFO L175 Difference]: Start difference. First operand has 36 places, 27 transitions, 163 flow. Second operand 4 states and 615 transitions. [2023-08-31 04:07:45,617 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 40 transitions, 297 flow [2023-08-31 04:07:45,619 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 40 transitions, 278 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-31 04:07:45,620 INFO L231 Difference]: Finished difference. Result has 37 places, 29 transitions, 193 flow [2023-08-31 04:07:45,620 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=193, PETRI_PLACES=37, PETRI_TRANSITIONS=29} [2023-08-31 04:07:45,621 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 16 predicate places. [2023-08-31 04:07:45,621 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 29 transitions, 193 flow [2023-08-31 04:07:45,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 149.75) internal successors, (599), 4 states have internal predecessors, (599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:07:45,622 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:07:45,622 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:07:45,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-31 04:07:45,622 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:07:45,623 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:07:45,623 INFO L85 PathProgramCache]: Analyzing trace with hash -1410892719, now seen corresponding path program 2 times [2023-08-31 04:07:45,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:07:45,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770391056] [2023-08-31 04:07:45,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:07:45,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:07:45,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:07:45,730 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 04:07:45,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:07:45,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770391056] [2023-08-31 04:07:45,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770391056] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 04:07:45,731 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 04:07:45,731 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-31 04:07:45,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883328031] [2023-08-31 04:07:45,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 04:07:45,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-31 04:07:45,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:07:45,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-31 04:07:45,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-31 04:07:45,770 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 355 [2023-08-31 04:07:45,771 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 29 transitions, 193 flow. Second operand has 5 states, 5 states have (on average 145.2) internal successors, (726), 5 states have internal predecessors, (726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:07:45,772 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:07:45,772 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 355 [2023-08-31 04:07:45,772 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:07:45,871 INFO L130 PetriNetUnfolder]: 87/154 cut-off events. [2023-08-31 04:07:45,872 INFO L131 PetriNetUnfolder]: For 324/324 co-relation queries the response was YES. [2023-08-31 04:07:45,873 INFO L83 FinitePrefix]: Finished finitePrefix Result has 644 conditions, 154 events. 87/154 cut-off events. For 324/324 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 426 event pairs, 2 based on Foata normal form. 6/159 useless extension candidates. Maximal degree in co-relation 620. Up to 82 conditions per place. [2023-08-31 04:07:45,874 INFO L137 encePairwiseOnDemand]: 350/355 looper letters, 35 selfloop transitions, 12 changer transitions 0/47 dead transitions. [2023-08-31 04:07:45,874 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 47 transitions, 354 flow [2023-08-31 04:07:45,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-31 04:07:45,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-31 04:07:45,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 894 transitions. [2023-08-31 04:07:45,877 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4197183098591549 [2023-08-31 04:07:45,878 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 894 transitions. [2023-08-31 04:07:45,878 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 894 transitions. [2023-08-31 04:07:45,878 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:07:45,878 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 894 transitions. [2023-08-31 04:07:45,881 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 149.0) internal successors, (894), 6 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) [2023-08-31 04:07:45,884 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 355.0) internal successors, (2485), 7 states have internal predecessors, (2485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:07:45,885 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 355.0) internal successors, (2485), 7 states have internal predecessors, (2485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:07:45,885 INFO L175 Difference]: Start difference. First operand has 37 places, 29 transitions, 193 flow. Second operand 6 states and 894 transitions. [2023-08-31 04:07:45,885 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 47 transitions, 354 flow [2023-08-31 04:07:45,887 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 47 transitions, 327 flow, removed 10 selfloop flow, removed 2 redundant places. [2023-08-31 04:07:45,889 INFO L231 Difference]: Finished difference. Result has 40 places, 31 transitions, 223 flow [2023-08-31 04:07:45,889 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=172, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=223, PETRI_PLACES=40, PETRI_TRANSITIONS=31} [2023-08-31 04:07:45,890 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 19 predicate places. [2023-08-31 04:07:45,890 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 31 transitions, 223 flow [2023-08-31 04:07:45,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 145.2) internal successors, (726), 5 states have internal predecessors, (726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:07:45,890 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:07:45,890 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:07:45,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-31 04:07:45,891 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:07:45,891 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:07:45,891 INFO L85 PathProgramCache]: Analyzing trace with hash -1350358541, now seen corresponding path program 3 times [2023-08-31 04:07:45,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:07:45,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294989460] [2023-08-31 04:07:45,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:07:45,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:07:45,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:07:46,014 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 04:07:46,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:07:46,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294989460] [2023-08-31 04:07:46,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294989460] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 04:07:46,016 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 04:07:46,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-31 04:07:46,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393372714] [2023-08-31 04:07:46,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 04:07:46,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-31 04:07:46,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:07:46,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-31 04:07:46,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-31 04:07:46,053 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 355 [2023-08-31 04:07:46,054 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 31 transitions, 223 flow. Second operand has 5 states, 5 states have (on average 145.2) internal successors, (726), 5 states have internal predecessors, (726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:07:46,054 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:07:46,055 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 355 [2023-08-31 04:07:46,055 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:07:46,167 INFO L130 PetriNetUnfolder]: 98/181 cut-off events. [2023-08-31 04:07:46,168 INFO L131 PetriNetUnfolder]: For 604/604 co-relation queries the response was YES. [2023-08-31 04:07:46,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 770 conditions, 181 events. 98/181 cut-off events. For 604/604 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 526 event pairs, 31 based on Foata normal form. 6/186 useless extension candidates. Maximal degree in co-relation 745. Up to 124 conditions per place. [2023-08-31 04:07:46,170 INFO L137 encePairwiseOnDemand]: 350/355 looper letters, 37 selfloop transitions, 9 changer transitions 2/48 dead transitions. [2023-08-31 04:07:46,170 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 48 transitions, 402 flow [2023-08-31 04:07:46,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-31 04:07:46,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-31 04:07:46,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 745 transitions. [2023-08-31 04:07:46,172 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4197183098591549 [2023-08-31 04:07:46,172 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 745 transitions. [2023-08-31 04:07:46,173 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 745 transitions. [2023-08-31 04:07:46,173 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:07:46,173 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 745 transitions. [2023-08-31 04:07:46,175 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 149.0) internal successors, (745), 5 states have internal predecessors, (745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:07:46,177 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 355.0) internal successors, (2130), 6 states have internal predecessors, (2130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:07:46,178 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 355.0) internal successors, (2130), 6 states have internal predecessors, (2130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:07:46,178 INFO L175 Difference]: Start difference. First operand has 40 places, 31 transitions, 223 flow. Second operand 5 states and 745 transitions. [2023-08-31 04:07:46,178 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 48 transitions, 402 flow [2023-08-31 04:07:46,180 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 48 transitions, 364 flow, removed 7 selfloop flow, removed 3 redundant places. [2023-08-31 04:07:46,181 INFO L231 Difference]: Finished difference. Result has 44 places, 33 transitions, 245 flow [2023-08-31 04:07:46,181 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=191, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=245, PETRI_PLACES=44, PETRI_TRANSITIONS=33} [2023-08-31 04:07:46,182 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 23 predicate places. [2023-08-31 04:07:46,182 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 33 transitions, 245 flow [2023-08-31 04:07:46,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 145.2) internal successors, (726), 5 states have internal predecessors, (726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:07:46,183 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:07:46,183 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:07:46,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-31 04:07:46,183 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:07:46,184 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:07:46,184 INFO L85 PathProgramCache]: Analyzing trace with hash 1909704249, now seen corresponding path program 4 times [2023-08-31 04:07:46,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:07:46,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846156821] [2023-08-31 04:07:46,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:07:46,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:07:46,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:07:46,276 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 04:07:46,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:07:46,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846156821] [2023-08-31 04:07:46,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846156821] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 04:07:46,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005510224] [2023-08-31 04:07:46,277 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-31 04:07:46,277 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:07:46,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:07:46,279 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) [2023-08-31 04:07:46,290 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-31 04:07:46,371 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-31 04:07:46,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 04:07:46,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-31 04:07:46,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 04:07:46,431 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 04:07:46,432 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 04:07:46,503 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 04:07:46,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1005510224] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 04:07:46,503 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 04:07:46,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 7 [2023-08-31 04:07:46,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352394875] [2023-08-31 04:07:46,504 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 04:07:46,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-31 04:07:46,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:07:46,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-31 04:07:46,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-08-31 04:07:46,625 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 355 [2023-08-31 04:07:46,626 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 33 transitions, 245 flow. Second operand has 7 states, 7 states have (on average 144.57142857142858) internal successors, (1012), 7 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:07:46,626 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:07:46,626 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 355 [2023-08-31 04:07:46,626 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:07:46,798 INFO L130 PetriNetUnfolder]: 113/206 cut-off events. [2023-08-31 04:07:46,798 INFO L131 PetriNetUnfolder]: For 726/726 co-relation queries the response was YES. [2023-08-31 04:07:46,799 INFO L83 FinitePrefix]: Finished finitePrefix Result has 947 conditions, 206 events. 113/206 cut-off events. For 726/726 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 613 event pairs, 28 based on Foata normal form. 6/211 useless extension candidates. Maximal degree in co-relation 919. Up to 127 conditions per place. [2023-08-31 04:07:46,800 INFO L137 encePairwiseOnDemand]: 350/355 looper letters, 40 selfloop transitions, 17 changer transitions 2/59 dead transitions. [2023-08-31 04:07:46,801 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 59 transitions, 498 flow [2023-08-31 04:07:46,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-31 04:07:46,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-31 04:07:46,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1035 transitions. [2023-08-31 04:07:46,804 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4164989939637827 [2023-08-31 04:07:46,804 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1035 transitions. [2023-08-31 04:07:46,804 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1035 transitions. [2023-08-31 04:07:46,805 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:07:46,805 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1035 transitions. [2023-08-31 04:07:46,807 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 147.85714285714286) internal successors, (1035), 7 states have internal predecessors, (1035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:07:46,810 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 355.0) internal successors, (2840), 8 states have internal predecessors, (2840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:07:46,811 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 355.0) internal successors, (2840), 8 states have internal predecessors, (2840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:07:46,811 INFO L175 Difference]: Start difference. First operand has 44 places, 33 transitions, 245 flow. Second operand 7 states and 1035 transitions. [2023-08-31 04:07:46,811 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 59 transitions, 498 flow [2023-08-31 04:07:46,813 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 59 transitions, 466 flow, removed 11 selfloop flow, removed 2 redundant places. [2023-08-31 04:07:46,815 INFO L231 Difference]: Finished difference. Result has 49 places, 37 transitions, 306 flow [2023-08-31 04:07:46,815 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=223, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=306, PETRI_PLACES=49, PETRI_TRANSITIONS=37} [2023-08-31 04:07:46,815 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 28 predicate places. [2023-08-31 04:07:46,816 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 37 transitions, 306 flow [2023-08-31 04:07:46,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 144.57142857142858) internal successors, (1012), 7 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:07:46,816 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:07:46,817 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:07:46,824 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-31 04:07:47,021 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,SelfDestructingSolverStorable8 [2023-08-31 04:07:47,022 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:07:47,022 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:07:47,022 INFO L85 PathProgramCache]: Analyzing trace with hash -272112479, now seen corresponding path program 5 times [2023-08-31 04:07:47,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:07:47,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689708327] [2023-08-31 04:07:47,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:07:47,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:07:47,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:07:47,129 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 04:07:47,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:07:47,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689708327] [2023-08-31 04:07:47,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689708327] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 04:07:47,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813459730] [2023-08-31 04:07:47,130 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-31 04:07:47,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:07:47,130 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:07:47,131 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) [2023-08-31 04:07:47,134 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-31 04:07:47,211 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 04:07:47,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 04:07:47,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-31 04:07:47,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 04:07:47,257 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 04:07:47,257 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 04:07:47,323 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 04:07:47,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1813459730] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 04:07:47,324 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 04:07:47,324 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-08-31 04:07:47,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841866566] [2023-08-31 04:07:47,324 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 04:07:47,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-31 04:07:47,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:07:47,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-31 04:07:47,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-08-31 04:07:47,425 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 355 [2023-08-31 04:07:47,426 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 37 transitions, 306 flow. Second operand has 8 states, 8 states have (on average 143.75) internal successors, (1150), 8 states have internal predecessors, (1150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:07:47,426 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:07:47,426 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 355 [2023-08-31 04:07:47,426 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:07:47,554 INFO L130 PetriNetUnfolder]: 107/192 cut-off events. [2023-08-31 04:07:47,554 INFO L131 PetriNetUnfolder]: For 813/813 co-relation queries the response was YES. [2023-08-31 04:07:47,555 INFO L83 FinitePrefix]: Finished finitePrefix Result has 908 conditions, 192 events. 107/192 cut-off events. For 813/813 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 550 event pairs, 31 based on Foata normal form. 6/197 useless extension candidates. Maximal degree in co-relation 879. Up to 136 conditions per place. [2023-08-31 04:07:47,556 INFO L137 encePairwiseOnDemand]: 350/355 looper letters, 33 selfloop transitions, 14 changer transitions 2/49 dead transitions. [2023-08-31 04:07:47,557 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 49 transitions, 464 flow [2023-08-31 04:07:47,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-31 04:07:47,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-31 04:07:47,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 741 transitions. [2023-08-31 04:07:47,561 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41746478873239434 [2023-08-31 04:07:47,561 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 741 transitions. [2023-08-31 04:07:47,561 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 741 transitions. [2023-08-31 04:07:47,562 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:07:47,562 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 741 transitions. [2023-08-31 04:07:47,563 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 148.2) internal successors, (741), 5 states have internal predecessors, (741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:07:47,566 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 355.0) internal successors, (2130), 6 states have internal predecessors, (2130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:07:47,567 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 355.0) internal successors, (2130), 6 states have internal predecessors, (2130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:07:47,567 INFO L175 Difference]: Start difference. First operand has 49 places, 37 transitions, 306 flow. Second operand 5 states and 741 transitions. [2023-08-31 04:07:47,567 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 49 transitions, 464 flow [2023-08-31 04:07:47,569 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 49 transitions, 429 flow, removed 6 selfloop flow, removed 3 redundant places. [2023-08-31 04:07:47,571 INFO L231 Difference]: Finished difference. Result has 51 places, 37 transitions, 308 flow [2023-08-31 04:07:47,572 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=275, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=308, PETRI_PLACES=51, PETRI_TRANSITIONS=37} [2023-08-31 04:07:47,573 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 30 predicate places. [2023-08-31 04:07:47,574 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 37 transitions, 308 flow [2023-08-31 04:07:47,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 143.75) internal successors, (1150), 8 states have internal predecessors, (1150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:07:47,575 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:07:47,575 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:07:47,583 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-31 04:07:47,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:07:47,781 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:07:47,781 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:07:47,782 INFO L85 PathProgramCache]: Analyzing trace with hash -1221792128, now seen corresponding path program 1 times [2023-08-31 04:07:47,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:07:47,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10715520] [2023-08-31 04:07:47,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:07:47,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:07:47,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:07:48,171 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-31 04:07:48,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:07:48,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10715520] [2023-08-31 04:07:48,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10715520] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 04:07:48,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229713098] [2023-08-31 04:07:48,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:07:48,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:07:48,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:07:48,177 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) [2023-08-31 04:07:48,180 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-31 04:07:48,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:07:48,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 30 conjunts are in the unsatisfiable core [2023-08-31 04:07:48,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 04:07:48,494 INFO L321 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2023-08-31 04:07:48,495 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 26 [2023-08-31 04:07:48,517 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 04:07:48,517 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 04:07:48,648 INFO L321 Elim1Store]: treesize reduction 5, result has 92.3 percent of original size [2023-08-31 04:07:48,648 INFO L350 Elim1Store]: Elim1 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 74 treesize of output 85 [2023-08-31 04:07:48,876 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 04:07:48,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1229713098] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 04:07:48,876 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 04:07:48,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 14 [2023-08-31 04:07:48,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195913046] [2023-08-31 04:07:48,877 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 04:07:48,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-31 04:07:48,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:07:48,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-31 04:07:48,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2023-08-31 04:07:49,580 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 355 [2023-08-31 04:07:49,582 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 37 transitions, 308 flow. Second operand has 14 states, 14 states have (on average 129.07142857142858) internal successors, (1807), 14 states have internal predecessors, (1807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:07:49,582 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:07:49,582 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 355 [2023-08-31 04:07:49,582 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:07:50,866 INFO L130 PetriNetUnfolder]: 285/505 cut-off events. [2023-08-31 04:07:50,867 INFO L131 PetriNetUnfolder]: For 1844/1886 co-relation queries the response was YES. [2023-08-31 04:07:50,869 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2338 conditions, 505 events. 285/505 cut-off events. For 1844/1886 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 2095 event pairs, 18 based on Foata normal form. 58/557 useless extension candidates. Maximal degree in co-relation 2008. Up to 251 conditions per place. [2023-08-31 04:07:50,871 INFO L137 encePairwiseOnDemand]: 346/355 looper letters, 38 selfloop transitions, 23 changer transitions 77/141 dead transitions. [2023-08-31 04:07:50,871 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 141 transitions, 1231 flow [2023-08-31 04:07:50,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-31 04:07:50,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-31 04:07:50,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 2886 transitions. [2023-08-31 04:07:50,879 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36952624839948783 [2023-08-31 04:07:50,879 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 2886 transitions. [2023-08-31 04:07:50,879 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 2886 transitions. [2023-08-31 04:07:50,881 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:07:50,881 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 2886 transitions. [2023-08-31 04:07:50,886 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 131.1818181818182) internal successors, (2886), 22 states have internal predecessors, (2886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:07:50,895 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 355.0) internal successors, (8165), 23 states have internal predecessors, (8165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:07:50,897 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 355.0) internal successors, (8165), 23 states have internal predecessors, (8165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:07:50,897 INFO L175 Difference]: Start difference. First operand has 51 places, 37 transitions, 308 flow. Second operand 22 states and 2886 transitions. [2023-08-31 04:07:50,897 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 141 transitions, 1231 flow [2023-08-31 04:07:50,902 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 141 transitions, 1119 flow, removed 16 selfloop flow, removed 5 redundant places. [2023-08-31 04:07:50,904 INFO L231 Difference]: Finished difference. Result has 75 places, 44 transitions, 421 flow [2023-08-31 04:07:50,904 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=262, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=421, PETRI_PLACES=75, PETRI_TRANSITIONS=44} [2023-08-31 04:07:50,904 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 54 predicate places. [2023-08-31 04:07:50,904 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 44 transitions, 421 flow [2023-08-31 04:07:50,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 129.07142857142858) internal successors, (1807), 14 states have internal predecessors, (1807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:07:50,905 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:07:50,905 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:07:50,921 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-31 04:07:51,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:07:51,111 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:07:51,112 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:07:51,112 INFO L85 PathProgramCache]: Analyzing trace with hash -200909318, now seen corresponding path program 2 times [2023-08-31 04:07:51,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:07:51,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706863278] [2023-08-31 04:07:51,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:07:51,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:07:51,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:07:51,610 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 04:07:51,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:07:51,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706863278] [2023-08-31 04:07:51,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706863278] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 04:07:51,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929492289] [2023-08-31 04:07:51,611 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 04:07:51,611 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:07:51,611 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:07:51,612 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) [2023-08-31 04:07:51,614 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-31 04:07:51,752 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 04:07:51,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 04:07:51,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 33 conjunts are in the unsatisfiable core [2023-08-31 04:07:51,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 04:07:51,980 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-31 04:07:51,990 INFO L321 Elim1Store]: treesize reduction 41, result has 14.6 percent of original size [2023-08-31 04:07:51,990 INFO L350 Elim1Store]: Elim1 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 55 treesize of output 29 [2023-08-31 04:07:52,024 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 04:07:52,024 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 04:07:52,135 INFO L321 Elim1Store]: treesize reduction 5, result has 92.3 percent of original size [2023-08-31 04:07:52,136 INFO L350 Elim1Store]: Elim1 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 74 treesize of output 85 [2023-08-31 04:07:52,367 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 04:07:52,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1929492289] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 04:07:52,367 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 04:07:52,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 15 [2023-08-31 04:07:52,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804024202] [2023-08-31 04:07:52,368 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 04:07:52,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-31 04:07:52,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:07:52,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-31 04:07:52,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2023-08-31 04:07:53,850 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 355 [2023-08-31 04:07:53,852 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 44 transitions, 421 flow. Second operand has 15 states, 15 states have (on average 129.0) internal successors, (1935), 15 states have internal predecessors, (1935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:07:53,853 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:07:53,853 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 355 [2023-08-31 04:07:53,853 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:07:59,013 INFO L130 PetriNetUnfolder]: 229/420 cut-off events. [2023-08-31 04:07:59,013 INFO L131 PetriNetUnfolder]: For 2358/2379 co-relation queries the response was YES. [2023-08-31 04:07:59,015 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2458 conditions, 420 events. 229/420 cut-off events. For 2358/2379 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1623 event pairs, 0 based on Foata normal form. 48/467 useless extension candidates. Maximal degree in co-relation 2425. Up to 208 conditions per place. [2023-08-31 04:07:59,017 INFO L137 encePairwiseOnDemand]: 347/355 looper letters, 78 selfloop transitions, 35 changer transitions 33/149 dead transitions. [2023-08-31 04:07:59,017 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 149 transitions, 1488 flow [2023-08-31 04:07:59,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-08-31 04:07:59,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-08-31 04:07:59,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 3398 transitions. [2023-08-31 04:07:59,042 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36814734561213436 [2023-08-31 04:07:59,042 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 3398 transitions. [2023-08-31 04:07:59,043 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 3398 transitions. [2023-08-31 04:07:59,045 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:07:59,045 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 3398 transitions. [2023-08-31 04:07:59,052 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 130.69230769230768) internal successors, (3398), 26 states have internal predecessors, (3398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:07:59,065 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 355.0) internal successors, (9585), 27 states have internal predecessors, (9585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:07:59,067 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 355.0) internal successors, (9585), 27 states have internal predecessors, (9585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:07:59,067 INFO L175 Difference]: Start difference. First operand has 75 places, 44 transitions, 421 flow. Second operand 26 states and 3398 transitions. [2023-08-31 04:07:59,067 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 149 transitions, 1488 flow [2023-08-31 04:07:59,075 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 149 transitions, 1251 flow, removed 98 selfloop flow, removed 13 redundant places. [2023-08-31 04:07:59,079 INFO L231 Difference]: Finished difference. Result has 88 places, 56 transitions, 582 flow [2023-08-31 04:07:59,080 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=332, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=582, PETRI_PLACES=88, PETRI_TRANSITIONS=56} [2023-08-31 04:07:59,081 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 67 predicate places. [2023-08-31 04:07:59,081 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 56 transitions, 582 flow [2023-08-31 04:07:59,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 129.0) internal successors, (1935), 15 states have internal predecessors, (1935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:07:59,088 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:07:59,088 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:07:59,103 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-31 04:07:59,293 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,SelfDestructingSolverStorable11 [2023-08-31 04:07:59,293 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:07:59,294 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:07:59,294 INFO L85 PathProgramCache]: Analyzing trace with hash -1769074402, now seen corresponding path program 3 times [2023-08-31 04:07:59,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:07:59,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171565521] [2023-08-31 04:07:59,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:07:59,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:07:59,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:07:59,999 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 04:07:59,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:07:59,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171565521] [2023-08-31 04:07:59,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171565521] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 04:08:00,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950801865] [2023-08-31 04:08:00,000 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 04:08:00,000 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:08:00,000 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:08:00,001 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) [2023-08-31 04:08:00,004 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-31 04:08:00,109 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-31 04:08:00,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 04:08:00,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 44 conjunts are in the unsatisfiable core [2023-08-31 04:08:00,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 04:08:00,159 INFO L350 Elim1Store]: Elim1 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 [2023-08-31 04:08:00,205 INFO L350 Elim1Store]: Elim1 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 [2023-08-31 04:08:00,248 INFO L350 Elim1Store]: Elim1 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 [2023-08-31 04:08:00,402 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-31 04:08:00,412 INFO L321 Elim1Store]: treesize reduction 41, result has 14.6 percent of original size [2023-08-31 04:08:00,412 INFO L350 Elim1Store]: Elim1 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 55 treesize of output 29 [2023-08-31 04:08:00,418 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 04:08:00,419 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 04:08:00,594 WARN L839 $PredicateComparison]: unable to prove that (forall ((~x1~0 Int) (v_ArrVal_287 (Array Int Int))) (let ((.cse1 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_287) c_~f~0.base))) (let ((.cse0 (select .cse1 (+ c_~f~0.offset (* (select .cse1 (+ (* c_~x2~0 4) c_~f~0.offset)) 4))))) (or (<= c_~size~0 .cse0) (< ~x1~0 0) (<= c_~size~0 ~x1~0) (< .cse0 0) (= (select .cse1 (+ (* 4 .cse0) c_~f~0.offset)) (select .cse1 (+ (* ~x1~0 4) c_~f~0.offset))))))) is different from false [2023-08-31 04:08:00,739 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 04:08:00,739 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 218 treesize of output 134 [2023-08-31 04:08:00,773 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 04:08:00,773 INFO L350 Elim1Store]: Elim1 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 332 treesize of output 348 [2023-08-31 04:08:00,832 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 04:08:00,833 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 268 treesize of output 252 [2023-08-31 04:08:00,894 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 04:08:00,894 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 109 treesize of output 141 [2023-08-31 04:08:02,278 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 3 not checked. [2023-08-31 04:08:02,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1950801865] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 04:08:02,279 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 04:08:02,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 16 [2023-08-31 04:08:02,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849653594] [2023-08-31 04:08:02,279 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 04:08:02,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-31 04:08:02,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:08:02,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-31 04:08:02,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=210, Unknown=1, NotChecked=30, Total=306 [2023-08-31 04:08:02,293 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 355 [2023-08-31 04:08:02,295 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 56 transitions, 582 flow. Second operand has 18 states, 18 states have (on average 108.44444444444444) internal successors, (1952), 18 states have internal predecessors, (1952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:08:02,295 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:08:02,295 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 355 [2023-08-31 04:08:02,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:08:02,654 INFO L130 PetriNetUnfolder]: 174/328 cut-off events. [2023-08-31 04:08:02,654 INFO L131 PetriNetUnfolder]: For 1868/1895 co-relation queries the response was YES. [2023-08-31 04:08:02,656 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1948 conditions, 328 events. 174/328 cut-off events. For 1868/1895 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1204 event pairs, 20 based on Foata normal form. 21/341 useless extension candidates. Maximal degree in co-relation 1918. Up to 210 conditions per place. [2023-08-31 04:08:02,657 INFO L137 encePairwiseOnDemand]: 349/355 looper letters, 30 selfloop transitions, 9 changer transitions 29/74 dead transitions. [2023-08-31 04:08:02,658 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 74 transitions, 807 flow [2023-08-31 04:08:02,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-31 04:08:02,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-31 04:08:02,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 890 transitions. [2023-08-31 04:08:02,661 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31338028169014087 [2023-08-31 04:08:02,661 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 890 transitions. [2023-08-31 04:08:02,661 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 890 transitions. [2023-08-31 04:08:02,662 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:08:02,662 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 890 transitions. [2023-08-31 04:08:02,664 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 111.25) internal successors, (890), 8 states have internal predecessors, (890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:08:02,667 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 355.0) internal successors, (3195), 9 states have internal predecessors, (3195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:08:02,668 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 355.0) internal successors, (3195), 9 states have internal predecessors, (3195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:08:02,668 INFO L175 Difference]: Start difference. First operand has 88 places, 56 transitions, 582 flow. Second operand 8 states and 890 transitions. [2023-08-31 04:08:02,668 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 74 transitions, 807 flow [2023-08-31 04:08:02,674 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 74 transitions, 712 flow, removed 29 selfloop flow, removed 14 redundant places. [2023-08-31 04:08:02,676 INFO L231 Difference]: Finished difference. Result has 77 places, 42 transitions, 379 flow [2023-08-31 04:08:02,676 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=491, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=379, PETRI_PLACES=77, PETRI_TRANSITIONS=42} [2023-08-31 04:08:02,676 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 56 predicate places. [2023-08-31 04:08:02,677 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 42 transitions, 379 flow [2023-08-31 04:08:02,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 108.44444444444444) internal successors, (1952), 18 states have internal predecessors, (1952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:08:02,677 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:08:02,678 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:08:02,688 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-31 04:08:02,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:08:02,884 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:08:02,884 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:08:02,884 INFO L85 PathProgramCache]: Analyzing trace with hash 338363705, now seen corresponding path program 4 times [2023-08-31 04:08:02,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:08:02,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398588025] [2023-08-31 04:08:02,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:08:02,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:08:02,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:08:05,220 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 04:08:05,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:08:05,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398588025] [2023-08-31 04:08:05,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398588025] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 04:08:05,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662991496] [2023-08-31 04:08:05,221 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-31 04:08:05,221 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:08:05,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:08:05,222 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) [2023-08-31 04:08:05,233 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-31 04:08:05,319 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-31 04:08:05,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 04:08:05,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 27 conjunts are in the unsatisfiable core [2023-08-31 04:08:05,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 04:08:05,501 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 04:08:05,502 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 41 [2023-08-31 04:08:05,513 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 04:08:05,513 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 04:08:05,735 INFO L321 Elim1Store]: treesize reduction 15, result has 90.2 percent of original size [2023-08-31 04:08:05,736 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 51 treesize of output 173 [2023-08-31 04:08:05,965 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-31 04:08:05,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662991496] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 04:08:05,965 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 04:08:05,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 4] total 18 [2023-08-31 04:08:05,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211199720] [2023-08-31 04:08:05,966 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 04:08:05,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-31 04:08:05,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:08:05,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-31 04:08:05,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2023-08-31 04:08:07,359 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 355 [2023-08-31 04:08:07,361 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 42 transitions, 379 flow. Second operand has 20 states, 20 states have (on average 131.05) internal successors, (2621), 20 states have internal predecessors, (2621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:08:07,361 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:08:07,361 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 355 [2023-08-31 04:08:07,361 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:08:08,275 INFO L130 PetriNetUnfolder]: 428/757 cut-off events. [2023-08-31 04:08:08,275 INFO L131 PetriNetUnfolder]: For 4045/4087 co-relation queries the response was YES. [2023-08-31 04:08:08,279 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4067 conditions, 757 events. 428/757 cut-off events. For 4045/4087 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 3320 event pairs, 21 based on Foata normal form. 38/784 useless extension candidates. Maximal degree in co-relation 4027. Up to 385 conditions per place. [2023-08-31 04:08:08,283 INFO L137 encePairwiseOnDemand]: 348/355 looper letters, 90 selfloop transitions, 81 changer transitions 2/179 dead transitions. [2023-08-31 04:08:08,283 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 179 transitions, 1794 flow [2023-08-31 04:08:08,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-31 04:08:08,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-31 04:08:08,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2571 transitions. [2023-08-31 04:08:08,289 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38117123795404 [2023-08-31 04:08:08,290 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2571 transitions. [2023-08-31 04:08:08,290 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2571 transitions. [2023-08-31 04:08:08,291 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:08:08,291 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2571 transitions. [2023-08-31 04:08:08,294 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 135.31578947368422) internal successors, (2571), 19 states have internal predecessors, (2571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:08:08,303 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 355.0) internal successors, (7100), 20 states have internal predecessors, (7100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:08:08,304 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 355.0) internal successors, (7100), 20 states have internal predecessors, (7100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:08:08,305 INFO L175 Difference]: Start difference. First operand has 77 places, 42 transitions, 379 flow. Second operand 19 states and 2571 transitions. [2023-08-31 04:08:08,305 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 179 transitions, 1794 flow [2023-08-31 04:08:08,313 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 179 transitions, 1606 flow, removed 69 selfloop flow, removed 11 redundant places. [2023-08-31 04:08:08,316 INFO L231 Difference]: Finished difference. Result has 76 places, 116 transitions, 1275 flow [2023-08-31 04:08:08,316 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=331, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=1275, PETRI_PLACES=76, PETRI_TRANSITIONS=116} [2023-08-31 04:08:08,317 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 55 predicate places. [2023-08-31 04:08:08,317 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 116 transitions, 1275 flow [2023-08-31 04:08:08,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 131.05) internal successors, (2621), 20 states have internal predecessors, (2621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:08:08,318 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:08:08,318 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:08:08,329 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-31 04:08:08,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:08:08,523 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:08:08,524 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:08:08,524 INFO L85 PathProgramCache]: Analyzing trace with hash 1347173951, now seen corresponding path program 5 times [2023-08-31 04:08:08,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:08:08,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667349997] [2023-08-31 04:08:08,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:08:08,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:08:08,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:08:09,901 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 04:08:09,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:08:09,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667349997] [2023-08-31 04:08:09,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667349997] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 04:08:09,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751962722] [2023-08-31 04:08:09,902 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-31 04:08:09,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:08:09,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:08:09,903 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) [2023-08-31 04:08:09,905 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-31 04:08:09,997 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-31 04:08:09,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 04:08:09,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 27 conjunts are in the unsatisfiable core [2023-08-31 04:08:10,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 04:08:10,176 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-31 04:08:10,217 INFO L321 Elim1Store]: treesize reduction 90, result has 27.4 percent of original size [2023-08-31 04:08:10,218 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 41 treesize of output 60 [2023-08-31 04:08:10,233 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 04:08:10,233 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 04:08:10,421 INFO L321 Elim1Store]: treesize reduction 15, result has 90.2 percent of original size [2023-08-31 04:08:10,422 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 51 treesize of output 173 [2023-08-31 04:08:10,622 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:08:10,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [751962722] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 04:08:10,623 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 04:08:10,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 5] total 19 [2023-08-31 04:08:10,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274906571] [2023-08-31 04:08:10,623 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 04:08:10,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-31 04:08:10,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:08:10,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-31 04:08:10,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2023-08-31 04:08:11,723 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 355 [2023-08-31 04:08:11,725 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 116 transitions, 1275 flow. Second operand has 21 states, 21 states have (on average 130.95238095238096) internal successors, (2750), 21 states have internal predecessors, (2750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:08:11,725 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:08:11,725 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 355 [2023-08-31 04:08:11,725 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:08:12,491 INFO L130 PetriNetUnfolder]: 586/1045 cut-off events. [2023-08-31 04:08:12,492 INFO L131 PetriNetUnfolder]: For 4506/4542 co-relation queries the response was YES. [2023-08-31 04:08:12,495 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5502 conditions, 1045 events. 586/1045 cut-off events. For 4506/4542 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 5045 event pairs, 64 based on Foata normal form. 30/1064 useless extension candidates. Maximal degree in co-relation 4905. Up to 610 conditions per place. [2023-08-31 04:08:12,501 INFO L137 encePairwiseOnDemand]: 348/355 looper letters, 115 selfloop transitions, 80 changer transitions 2/203 dead transitions. [2023-08-31 04:08:12,501 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 203 transitions, 2226 flow [2023-08-31 04:08:12,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-08-31 04:08:12,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-08-31 04:08:12,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 2696 transitions. [2023-08-31 04:08:12,506 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37971830985915495 [2023-08-31 04:08:12,507 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 2696 transitions. [2023-08-31 04:08:12,507 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 2696 transitions. [2023-08-31 04:08:12,508 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:08:12,508 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 2696 transitions. [2023-08-31 04:08:12,511 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 134.8) internal successors, (2696), 20 states have internal predecessors, (2696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:08:12,518 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 355.0) internal successors, (7455), 21 states have internal predecessors, (7455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:08:12,519 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 355.0) internal successors, (7455), 21 states have internal predecessors, (7455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:08:12,519 INFO L175 Difference]: Start difference. First operand has 76 places, 116 transitions, 1275 flow. Second operand 20 states and 2696 transitions. [2023-08-31 04:08:12,519 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 203 transitions, 2226 flow [2023-08-31 04:08:12,530 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 203 transitions, 1978 flow, removed 122 selfloop flow, removed 2 redundant places. [2023-08-31 04:08:12,533 INFO L231 Difference]: Finished difference. Result has 98 places, 144 transitions, 1603 flow [2023-08-31 04:08:12,533 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=1059, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=1603, PETRI_PLACES=98, PETRI_TRANSITIONS=144} [2023-08-31 04:08:12,534 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 77 predicate places. [2023-08-31 04:08:12,534 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 144 transitions, 1603 flow [2023-08-31 04:08:12,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 130.95238095238096) internal successors, (2750), 21 states have internal predecessors, (2750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:08:12,535 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:08:12,535 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:08:12,545 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-31 04:08:12,743 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,SelfDestructingSolverStorable14 [2023-08-31 04:08:12,744 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:08:12,744 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:08:12,744 INFO L85 PathProgramCache]: Analyzing trace with hash -182781255, now seen corresponding path program 6 times [2023-08-31 04:08:12,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:08:12,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408325330] [2023-08-31 04:08:12,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:08:12,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:08:12,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:08:13,884 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 04:08:13,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:08:13,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408325330] [2023-08-31 04:08:13,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408325330] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 04:08:13,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413080500] [2023-08-31 04:08:13,885 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-31 04:08:13,886 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:08:13,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:08:13,887 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) [2023-08-31 04:08:13,889 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-31 04:08:14,085 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-31 04:08:14,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 04:08:14,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 27 conjunts are in the unsatisfiable core [2023-08-31 04:08:14,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 04:08:14,245 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 04:08:14,246 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 41 [2023-08-31 04:08:14,256 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 04:08:14,256 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 04:08:14,417 INFO L321 Elim1Store]: treesize reduction 15, result has 90.2 percent of original size [2023-08-31 04:08:14,418 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 51 treesize of output 173 [2023-08-31 04:08:14,615 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-31 04:08:14,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1413080500] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 04:08:14,616 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 04:08:14,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 4] total 18 [2023-08-31 04:08:14,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401778831] [2023-08-31 04:08:14,616 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 04:08:14,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-31 04:08:14,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:08:14,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-31 04:08:14,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2023-08-31 04:08:15,502 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 355 [2023-08-31 04:08:15,505 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 144 transitions, 1603 flow. Second operand has 20 states, 20 states have (on average 131.15) internal successors, (2623), 20 states have internal predecessors, (2623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:08:15,505 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:08:15,505 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 355 [2023-08-31 04:08:15,505 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:08:16,280 INFO L130 PetriNetUnfolder]: 758/1356 cut-off events. [2023-08-31 04:08:16,280 INFO L131 PetriNetUnfolder]: For 5979/6017 co-relation queries the response was YES. [2023-08-31 04:08:16,284 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7013 conditions, 1356 events. 758/1356 cut-off events. For 5979/6017 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 6998 event pairs, 117 based on Foata normal form. 33/1378 useless extension candidates. Maximal degree in co-relation 6966. Up to 938 conditions per place. [2023-08-31 04:08:16,291 INFO L137 encePairwiseOnDemand]: 348/355 looper letters, 139 selfloop transitions, 70 changer transitions 1/216 dead transitions. [2023-08-31 04:08:16,291 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 216 transitions, 2546 flow [2023-08-31 04:08:16,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-31 04:08:16,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-31 04:08:16,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2285 transitions. [2023-08-31 04:08:16,295 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37862468931234466 [2023-08-31 04:08:16,295 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2285 transitions. [2023-08-31 04:08:16,295 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2285 transitions. [2023-08-31 04:08:16,296 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:08:16,296 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2285 transitions. [2023-08-31 04:08:16,298 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 134.41176470588235) internal successors, (2285), 17 states have internal predecessors, (2285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:08:16,304 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 355.0) internal successors, (6390), 18 states have internal predecessors, (6390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:08:16,304 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 355.0) internal successors, (6390), 18 states have internal predecessors, (6390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:08:16,304 INFO L175 Difference]: Start difference. First operand has 98 places, 144 transitions, 1603 flow. Second operand 17 states and 2285 transitions. [2023-08-31 04:08:16,305 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 216 transitions, 2546 flow [2023-08-31 04:08:16,323 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 216 transitions, 2383 flow, removed 53 selfloop flow, removed 9 redundant places. [2023-08-31 04:08:16,327 INFO L231 Difference]: Finished difference. Result has 109 places, 172 transitions, 2020 flow [2023-08-31 04:08:16,327 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=1440, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=2020, PETRI_PLACES=109, PETRI_TRANSITIONS=172} [2023-08-31 04:08:16,328 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 88 predicate places. [2023-08-31 04:08:16,328 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 172 transitions, 2020 flow [2023-08-31 04:08:16,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 131.15) internal successors, (2623), 20 states have internal predecessors, (2623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:08:16,329 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:08:16,329 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:08:16,339 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-31 04:08:16,534 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,SelfDestructingSolverStorable15 [2023-08-31 04:08:16,534 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:08:16,535 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:08:16,535 INFO L85 PathProgramCache]: Analyzing trace with hash -2064264659, now seen corresponding path program 7 times [2023-08-31 04:08:16,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:08:16,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965053571] [2023-08-31 04:08:16,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:08:16,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:08:16,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:08:17,486 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 04:08:17,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:08:17,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965053571] [2023-08-31 04:08:17,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965053571] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 04:08:17,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174248294] [2023-08-31 04:08:17,487 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-31 04:08:17,487 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:08:17,487 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:08:17,488 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) [2023-08-31 04:08:17,520 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-31 04:08:17,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:08:17,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 27 conjunts are in the unsatisfiable core [2023-08-31 04:08:17,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 04:08:17,754 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 04:08:17,755 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 41 [2023-08-31 04:08:17,765 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 04:08:17,766 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 04:08:17,956 INFO L321 Elim1Store]: treesize reduction 15, result has 90.2 percent of original size [2023-08-31 04:08:17,956 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 51 treesize of output 173 [2023-08-31 04:08:18,184 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:08:18,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1174248294] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 04:08:18,184 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 04:08:18,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 4] total 18 [2023-08-31 04:08:18,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960631002] [2023-08-31 04:08:18,185 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 04:08:18,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-31 04:08:18,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:08:18,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-31 04:08:18,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2023-08-31 04:08:19,104 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 355 [2023-08-31 04:08:19,105 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 172 transitions, 2020 flow. Second operand has 20 states, 20 states have (on average 136.15) internal successors, (2723), 20 states have internal predecessors, (2723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:08:19,106 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:08:19,106 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 355 [2023-08-31 04:08:19,106 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:08:19,822 INFO L130 PetriNetUnfolder]: 1038/1864 cut-off events. [2023-08-31 04:08:19,822 INFO L131 PetriNetUnfolder]: For 8651/8693 co-relation queries the response was YES. [2023-08-31 04:08:19,827 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9823 conditions, 1864 events. 1038/1864 cut-off events. For 8651/8693 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 10420 event pairs, 189 based on Foata normal form. 37/1890 useless extension candidates. Maximal degree in co-relation 9771. Up to 1242 conditions per place. [2023-08-31 04:08:19,836 INFO L137 encePairwiseOnDemand]: 349/355 looper letters, 189 selfloop transitions, 80 changer transitions 2/277 dead transitions. [2023-08-31 04:08:19,836 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 277 transitions, 3452 flow [2023-08-31 04:08:19,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-08-31 04:08:19,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-08-31 04:08:19,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 2792 transitions. [2023-08-31 04:08:19,840 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39323943661971833 [2023-08-31 04:08:19,840 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 2792 transitions. [2023-08-31 04:08:19,840 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 2792 transitions. [2023-08-31 04:08:19,841 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:08:19,841 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 2792 transitions. [2023-08-31 04:08:19,845 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 139.6) internal successors, (2792), 20 states have internal predecessors, (2792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:08:19,849 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 355.0) internal successors, (7455), 21 states have internal predecessors, (7455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:08:19,850 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 355.0) internal successors, (7455), 21 states have internal predecessors, (7455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:08:19,850 INFO L175 Difference]: Start difference. First operand has 109 places, 172 transitions, 2020 flow. Second operand 20 states and 2792 transitions. [2023-08-31 04:08:19,851 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 277 transitions, 3452 flow [2023-08-31 04:08:19,880 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 277 transitions, 3292 flow, removed 57 selfloop flow, removed 8 redundant places. [2023-08-31 04:08:19,885 INFO L231 Difference]: Finished difference. Result has 126 places, 218 transitions, 2810 flow [2023-08-31 04:08:19,885 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=1880, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=2810, PETRI_PLACES=126, PETRI_TRANSITIONS=218} [2023-08-31 04:08:19,885 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 105 predicate places. [2023-08-31 04:08:19,886 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 218 transitions, 2810 flow [2023-08-31 04:08:19,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 136.15) internal successors, (2723), 20 states have internal predecessors, (2723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:08:19,886 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:08:19,886 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:08:19,893 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-31 04:08:20,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-08-31 04:08:20,093 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:08:20,094 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:08:20,094 INFO L85 PathProgramCache]: Analyzing trace with hash -927240523, now seen corresponding path program 8 times [2023-08-31 04:08:20,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:08:20,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742699958] [2023-08-31 04:08:20,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:08:20,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:08:20,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:08:21,061 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 04:08:21,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:08:21,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742699958] [2023-08-31 04:08:21,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742699958] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 04:08:21,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849506312] [2023-08-31 04:08:21,062 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 04:08:21,062 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:08:21,062 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:08:21,065 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 04:08:21,084 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-31 04:08:21,213 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 04:08:21,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 04:08:21,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 32 conjunts are in the unsatisfiable core [2023-08-31 04:08:21,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 04:08:21,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 04:08:21,316 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-31 04:08:21,390 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 04:08:21,390 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 41 [2023-08-31 04:08:21,400 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 04:08:21,400 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 04:08:21,466 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_458 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_458) c_~f~0.base))) (= (select .cse0 (+ (* (select .cse0 (+ (* c_~x1~0 4) c_~f~0.offset)) 4) c_~f~0.offset)) (select .cse0 (+ c_~f~0.offset (* (select .cse0 (+ c_~f~0.offset (* (select .cse0 (+ (* c_~x2~0 4) c_~f~0.offset)) 4))) 4)))))) is different from false [2023-08-31 04:08:21,544 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 04:08:21,545 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 102 treesize of output 230 [2023-08-31 04:08:21,593 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 04:08:21,593 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 37 treesize of output 136 [2023-08-31 04:08:22,500 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:08:22,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1849506312] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 04:08:22,500 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 04:08:22,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 22 [2023-08-31 04:08:22,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682849077] [2023-08-31 04:08:22,501 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 04:08:22,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-31 04:08:22,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:08:22,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-31 04:08:22,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=437, Unknown=1, NotChecked=42, Total=552 [2023-08-31 04:08:22,733 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 355 [2023-08-31 04:08:22,735 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 218 transitions, 2810 flow. Second operand has 24 states, 24 states have (on average 110.70833333333333) internal successors, (2657), 24 states have internal predecessors, (2657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:08:22,735 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:08:22,735 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 355 [2023-08-31 04:08:22,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:08:24,703 INFO L130 PetriNetUnfolder]: 1315/2368 cut-off events. [2023-08-31 04:08:24,703 INFO L131 PetriNetUnfolder]: For 12875/12917 co-relation queries the response was YES. [2023-08-31 04:08:24,709 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13103 conditions, 2368 events. 1315/2368 cut-off events. For 12875/12917 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 13799 event pairs, 202 based on Foata normal form. 36/2393 useless extension candidates. Maximal degree in co-relation 13044. Up to 1492 conditions per place. [2023-08-31 04:08:24,721 INFO L137 encePairwiseOnDemand]: 346/355 looper letters, 188 selfloop transitions, 138 changer transitions 2/334 dead transitions. [2023-08-31 04:08:24,722 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 334 transitions, 4559 flow [2023-08-31 04:08:24,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-31 04:08:24,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-31 04:08:24,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 2522 transitions. [2023-08-31 04:08:24,726 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3229193341869398 [2023-08-31 04:08:24,726 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 2522 transitions. [2023-08-31 04:08:24,726 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 2522 transitions. [2023-08-31 04:08:24,727 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:08:24,728 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 2522 transitions. [2023-08-31 04:08:24,731 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 114.63636363636364) internal successors, (2522), 22 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) [2023-08-31 04:08:24,736 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 355.0) internal successors, (8165), 23 states have internal predecessors, (8165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:08:24,737 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 355.0) internal successors, (8165), 23 states have internal predecessors, (8165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:08:24,737 INFO L175 Difference]: Start difference. First operand has 126 places, 218 transitions, 2810 flow. Second operand 22 states and 2522 transitions. [2023-08-31 04:08:24,737 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 334 transitions, 4559 flow [2023-08-31 04:08:24,784 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 334 transitions, 4319 flow, removed 106 selfloop flow, removed 6 redundant places. [2023-08-31 04:08:24,789 INFO L231 Difference]: Finished difference. Result has 148 places, 273 transitions, 3840 flow [2023-08-31 04:08:24,789 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=2570, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=3840, PETRI_PLACES=148, PETRI_TRANSITIONS=273} [2023-08-31 04:08:24,790 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 127 predicate places. [2023-08-31 04:08:24,790 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 273 transitions, 3840 flow [2023-08-31 04:08:24,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 110.70833333333333) internal successors, (2657), 24 states have internal predecessors, (2657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:08:24,791 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:08:24,791 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:08:24,801 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-31 04:08:25,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-08-31 04:08:25,001 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:08:25,001 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:08:25,001 INFO L85 PathProgramCache]: Analyzing trace with hash -1798676721, now seen corresponding path program 9 times [2023-08-31 04:08:25,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:08:25,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061022066] [2023-08-31 04:08:25,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:08:25,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:08:25,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:08:26,439 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 04:08:26,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:08:26,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061022066] [2023-08-31 04:08:26,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061022066] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 04:08:26,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260074835] [2023-08-31 04:08:26,440 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 04:08:26,440 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:08:26,441 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:08:26,442 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 04:08:26,444 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-31 04:08:26,748 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-31 04:08:26,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 04:08:26,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 52 conjunts are in the unsatisfiable core [2023-08-31 04:08:26,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 04:08:26,844 INFO L350 Elim1Store]: Elim1 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 [2023-08-31 04:08:26,893 INFO L350 Elim1Store]: Elim1 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 [2023-08-31 04:08:26,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 04:08:26,971 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-31 04:08:27,122 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 04:08:27,123 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 65 treesize of output 47 [2023-08-31 04:08:27,138 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 04:08:27,139 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 04:08:27,509 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 04:08:27,510 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 371 treesize of output 215 [2023-08-31 04:08:27,720 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 04:08:27,721 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 13 new quantified variables, introduced 28 case distinctions, treesize of input 998 treesize of output 1106 [2023-08-31 04:08:28,045 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 04:08:28,046 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 11 new quantified variables, introduced 21 case distinctions, treesize of input 440 treesize of output 574 [2023-08-31 04:08:28,266 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 04:08:28,266 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 367 treesize of output 389 [2023-08-31 04:11:06,849 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 04:11:06,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1260074835] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 04:11:06,849 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 04:11:06,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 25 [2023-08-31 04:11:06,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108540631] [2023-08-31 04:11:06,850 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 04:11:06,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-31 04:11:06,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:11:06,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-31 04:11:06,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=594, Unknown=3, NotChecked=0, Total=702 [2023-08-31 04:11:09,117 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:11:11,760 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:11:13,888 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:11:14,052 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 355 [2023-08-31 04:11:14,054 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 273 transitions, 3840 flow. Second operand has 27 states, 27 states have (on average 107.55555555555556) internal successors, (2904), 27 states have internal predecessors, (2904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:11:14,054 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:11:14,054 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 355 [2023-08-31 04:11:14,054 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:11:14,328 WARN L839 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_496 (Array Int Int))) (let ((.cse1 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_496) c_~f~0.base))) (let ((.cse0 (select .cse1 (+ c_~f~0.offset (* (select .cse1 (+ (* c_~x2~0 4) c_~f~0.offset)) 4)))) (.cse2 (select .cse1 (+ c_~f~0.offset (* (select (select |c_#memory_int| c_~f~0.base) (+ (* c_~x1~0 4) c_~f~0.offset)) 4))))) (or (< .cse0 0) (= (select .cse1 (+ (* .cse2 4) c_~f~0.offset)) (select .cse1 (+ c_~f~0.offset (* 4 .cse0)))) (<= c_~size~0 .cse0) (< .cse2 0) (<= c_~size~0 .cse2))))) (= c_~x1~0 c_~x2~0)) is different from false [2023-08-31 04:11:20,783 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:11:23,298 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:11:29,601 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:11:30,428 INFO L130 PetriNetUnfolder]: 1929/3480 cut-off events. [2023-08-31 04:11:30,429 INFO L131 PetriNetUnfolder]: For 25463/25583 co-relation queries the response was YES. [2023-08-31 04:11:30,441 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21482 conditions, 3480 events. 1929/3480 cut-off events. For 25463/25583 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 22166 event pairs, 350 based on Foata normal form. 112/3575 useless extension candidates. Maximal degree in co-relation 20488. Up to 2005 conditions per place. [2023-08-31 04:11:30,455 INFO L137 encePairwiseOnDemand]: 347/355 looper letters, 262 selfloop transitions, 220 changer transitions 2/490 dead transitions. [2023-08-31 04:11:30,456 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 490 transitions, 7189 flow [2023-08-31 04:11:30,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-08-31 04:11:30,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-08-31 04:11:30,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 3242 transitions. [2023-08-31 04:11:30,460 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31491015055852356 [2023-08-31 04:11:30,460 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 3242 transitions. [2023-08-31 04:11:30,461 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 3242 transitions. [2023-08-31 04:11:30,462 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:11:30,462 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 3242 transitions. [2023-08-31 04:11:30,466 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 111.79310344827586) internal successors, (3242), 29 states have internal predecessors, (3242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:11:30,472 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 355.0) internal successors, (10650), 30 states have internal predecessors, (10650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:11:30,473 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 355.0) internal successors, (10650), 30 states have internal predecessors, (10650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:11:30,473 INFO L175 Difference]: Start difference. First operand has 148 places, 273 transitions, 3840 flow. Second operand 29 states and 3242 transitions. [2023-08-31 04:11:30,473 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 490 transitions, 7189 flow [2023-08-31 04:11:30,550 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 490 transitions, 6829 flow, removed 159 selfloop flow, removed 6 redundant places. [2023-08-31 04:11:30,558 INFO L231 Difference]: Finished difference. Result has 176 places, 405 transitions, 6205 flow [2023-08-31 04:11:30,558 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=3574, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=6205, PETRI_PLACES=176, PETRI_TRANSITIONS=405} [2023-08-31 04:11:30,559 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 155 predicate places. [2023-08-31 04:11:30,559 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 405 transitions, 6205 flow [2023-08-31 04:11:30,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 107.55555555555556) internal successors, (2904), 27 states have internal predecessors, (2904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:11:30,560 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:11:30,560 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:11:30,569 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-08-31 04:11:30,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:11:30,765 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:11:30,766 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:11:30,766 INFO L85 PathProgramCache]: Analyzing trace with hash -1813313051, now seen corresponding path program 10 times [2023-08-31 04:11:30,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:11:30,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808312266] [2023-08-31 04:11:30,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:11:30,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:11:30,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:11:32,184 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 04:11:32,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:11:32,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808312266] [2023-08-31 04:11:32,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808312266] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 04:11:32,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1690495662] [2023-08-31 04:11:32,185 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-31 04:11:32,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:11:32,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:11:32,186 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 04:11:32,188 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-31 04:11:32,280 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-31 04:11:32,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 04:11:32,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 34 conjunts are in the unsatisfiable core [2023-08-31 04:11:32,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 04:11:32,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 04:11:32,423 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-31 04:11:32,534 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 04:11:32,534 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 41 [2023-08-31 04:11:32,548 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 04:11:32,548 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 04:11:32,636 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_531 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_531) c_~f~0.base))) (= (select .cse0 (+ (* (select .cse0 (+ c_~f~0.offset (* (select .cse0 (+ (* c_~x2~0 4) c_~f~0.offset)) 4))) 4) c_~f~0.offset)) (select .cse0 (+ (* (select .cse0 (+ (* c_~x1~0 4) c_~f~0.offset)) 4) c_~f~0.offset))))) is different from false [2023-08-31 04:11:32,721 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 04:11:32,722 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 102 treesize of output 230 [2023-08-31 04:11:32,771 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 04:11:32,771 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 37 treesize of output 136 [2023-08-31 04:11:33,556 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:11:33,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1690495662] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 04:11:33,557 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 04:11:33,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 22 [2023-08-31 04:11:33,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749625875] [2023-08-31 04:11:33,557 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 04:11:33,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-31 04:11:33,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:11:33,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-31 04:11:33,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=437, Unknown=1, NotChecked=42, Total=552 [2023-08-31 04:11:33,691 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 355 [2023-08-31 04:11:33,692 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 405 transitions, 6205 flow. Second operand has 24 states, 24 states have (on average 107.79166666666667) internal successors, (2587), 24 states have internal predecessors, (2587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:11:33,692 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:11:33,692 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 355 [2023-08-31 04:11:33,692 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:11:35,096 INFO L130 PetriNetUnfolder]: 2190/3949 cut-off events. [2023-08-31 04:11:35,097 INFO L131 PetriNetUnfolder]: For 32861/32958 co-relation queries the response was YES. [2023-08-31 04:11:35,111 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25769 conditions, 3949 events. 2190/3949 cut-off events. For 32861/32958 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 25881 event pairs, 353 based on Foata normal form. 91/4023 useless extension candidates. Maximal degree in co-relation 24736. Up to 2858 conditions per place. [2023-08-31 04:11:35,129 INFO L137 encePairwiseOnDemand]: 346/355 looper letters, 321 selfloop transitions, 172 changer transitions 2/501 dead transitions. [2023-08-31 04:11:35,130 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 501 transitions, 8351 flow [2023-08-31 04:11:35,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-31 04:11:35,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-31 04:11:35,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 2340 transitions. [2023-08-31 04:11:35,134 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31388329979879276 [2023-08-31 04:11:35,134 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 2340 transitions. [2023-08-31 04:11:35,134 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 2340 transitions. [2023-08-31 04:11:35,135 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:11:35,135 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 2340 transitions. [2023-08-31 04:11:35,137 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 111.42857142857143) internal successors, (2340), 21 states have internal predecessors, (2340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:11:35,142 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 355.0) internal successors, (7810), 22 states have internal predecessors, (7810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:11:35,143 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 355.0) internal successors, (7810), 22 states have internal predecessors, (7810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:11:35,143 INFO L175 Difference]: Start difference. First operand has 176 places, 405 transitions, 6205 flow. Second operand 21 states and 2340 transitions. [2023-08-31 04:11:35,143 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 501 transitions, 8351 flow [2023-08-31 04:11:35,312 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 501 transitions, 7906 flow, removed 195 selfloop flow, removed 10 redundant places. [2023-08-31 04:11:35,321 INFO L231 Difference]: Finished difference. Result has 192 places, 447 transitions, 7163 flow [2023-08-31 04:11:35,322 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=5790, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=405, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=7163, PETRI_PLACES=192, PETRI_TRANSITIONS=447} [2023-08-31 04:11:35,322 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 171 predicate places. [2023-08-31 04:11:35,322 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 447 transitions, 7163 flow [2023-08-31 04:11:35,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 107.79166666666667) internal successors, (2587), 24 states have internal predecessors, (2587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:11:35,323 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:11:35,323 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:11:35,331 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-08-31 04:11:35,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2023-08-31 04:11:35,528 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:11:35,529 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:11:35,529 INFO L85 PathProgramCache]: Analyzing trace with hash 190166667, now seen corresponding path program 11 times [2023-08-31 04:11:35,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:11:35,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298097732] [2023-08-31 04:11:35,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:11:35,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:11:35,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:11:36,617 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 04:11:36,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:11:36,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298097732] [2023-08-31 04:11:36,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298097732] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 04:11:36,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225887638] [2023-08-31 04:11:36,617 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-31 04:11:36,617 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:11:36,618 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:11:36,621 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 04:11:36,625 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-08-31 04:11:36,761 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-31 04:11:36,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 04:11:36,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 32 conjunts are in the unsatisfiable core [2023-08-31 04:11:36,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 04:11:36,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 04:11:36,991 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 24 [2023-08-31 04:11:37,029 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-31 04:11:37,067 INFO L321 Elim1Store]: treesize reduction 86, result has 30.6 percent of original size [2023-08-31 04:11:37,068 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 41 treesize of output 64 [2023-08-31 04:11:37,078 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 04:11:37,079 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 04:11:37,969 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 04:11:37,969 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 106 treesize of output 218 [2023-08-31 04:11:37,991 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 04:11:37,992 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 56 [2023-08-31 04:11:38,634 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:11:38,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1225887638] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 04:11:38,634 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 04:11:38,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 22 [2023-08-31 04:11:38,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469535857] [2023-08-31 04:11:38,634 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 04:11:38,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-31 04:11:38,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:11:38,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-31 04:11:38,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=487, Unknown=1, NotChecked=0, Total=552 [2023-08-31 04:11:39,363 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 355 [2023-08-31 04:11:39,364 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 447 transitions, 7163 flow. Second operand has 24 states, 24 states have (on average 112.70833333333333) internal successors, (2705), 24 states have internal predecessors, (2705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:11:39,364 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:11:39,364 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 355 [2023-08-31 04:11:39,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:11:47,657 INFO L130 PetriNetUnfolder]: 2740/4959 cut-off events. [2023-08-31 04:11:47,658 INFO L131 PetriNetUnfolder]: For 50968/51101 co-relation queries the response was YES. [2023-08-31 04:11:47,678 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35095 conditions, 4959 events. 2740/4959 cut-off events. For 50968/51101 co-relation queries the response was YES. Maximal size of possible extension queue 303. Compared 33815 event pairs, 431 based on Foata normal form. 128/5067 useless extension candidates. Maximal degree in co-relation 33976. Up to 2486 conditions per place. [2023-08-31 04:11:47,707 INFO L137 encePairwiseOnDemand]: 349/355 looper letters, 294 selfloop transitions, 315 changer transitions 3/618 dead transitions. [2023-08-31 04:11:47,707 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 618 transitions, 10845 flow [2023-08-31 04:11:47,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-31 04:11:47,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-31 04:11:47,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 2707 transitions. [2023-08-31 04:11:47,716 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33153704837721987 [2023-08-31 04:11:47,716 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 2707 transitions. [2023-08-31 04:11:47,716 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 2707 transitions. [2023-08-31 04:11:47,718 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:11:47,719 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 2707 transitions. [2023-08-31 04:11:47,726 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 117.69565217391305) internal successors, (2707), 23 states have internal predecessors, (2707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:11:47,731 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 355.0) internal successors, (8520), 24 states have internal predecessors, (8520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:11:47,731 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 355.0) internal successors, (8520), 24 states have internal predecessors, (8520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:11:47,732 INFO L175 Difference]: Start difference. First operand has 192 places, 447 transitions, 7163 flow. Second operand 23 states and 2707 transitions. [2023-08-31 04:11:47,732 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 618 transitions, 10845 flow [2023-08-31 04:11:47,969 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 618 transitions, 10499 flow, removed 123 selfloop flow, removed 10 redundant places. [2023-08-31 04:11:47,980 INFO L231 Difference]: Finished difference. Result has 210 places, 532 transitions, 9655 flow [2023-08-31 04:11:47,980 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=6855, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=447, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=243, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=9655, PETRI_PLACES=210, PETRI_TRANSITIONS=532} [2023-08-31 04:11:47,981 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 189 predicate places. [2023-08-31 04:11:47,981 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 532 transitions, 9655 flow [2023-08-31 04:11:47,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 112.70833333333333) internal successors, (2705), 24 states have internal predecessors, (2705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:11:47,982 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:11:47,982 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:11:47,987 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-08-31 04:11:48,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:11:48,187 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:11:48,188 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:11:48,188 INFO L85 PathProgramCache]: Analyzing trace with hash 1743390373, now seen corresponding path program 12 times [2023-08-31 04:11:48,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:11:48,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054127128] [2023-08-31 04:11:48,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:11:48,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:11:48,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:11:49,597 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 04:11:49,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:11:49,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054127128] [2023-08-31 04:11:49,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054127128] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 04:11:49,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053539704] [2023-08-31 04:11:49,598 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-31 04:11:49,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:11:49,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:11:49,599 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 04:11:49,600 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-08-31 04:11:49,818 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-31 04:11:49,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 04:11:49,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 32 conjunts are in the unsatisfiable core [2023-08-31 04:11:49,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 04:11:49,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 04:11:49,955 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 20 [2023-08-31 04:11:50,023 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 04:11:50,023 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 41 [2023-08-31 04:11:50,034 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 04:11:50,034 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 04:11:50,089 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_601 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_601) c_~f~0.base))) (= (select .cse0 (+ (* c_~x1~0 4) c_~f~0.offset)) (select .cse0 (+ c_~f~0.offset (* (select .cse0 (+ c_~f~0.offset (* 4 (select .cse0 (+ (* c_~x2~0 4) c_~f~0.offset))))) 4)))))) is different from false [2023-08-31 04:11:50,197 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 04:11:50,197 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 104 treesize of output 224 [2023-08-31 04:11:50,229 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 04:11:50,229 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 31 treesize of output 88 [2023-08-31 04:11:50,700 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:11:50,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1053539704] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 04:11:50,700 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 04:11:50,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 22 [2023-08-31 04:11:50,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377773818] [2023-08-31 04:11:50,701 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 04:11:50,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-31 04:11:50,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:11:50,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-31 04:11:50,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=441, Unknown=2, NotChecked=42, Total=552 [2023-08-31 04:11:50,801 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 355 [2023-08-31 04:11:50,802 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 532 transitions, 9655 flow. Second operand has 24 states, 24 states have (on average 107.70833333333333) internal successors, (2585), 24 states have internal predecessors, (2585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:11:50,802 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:11:50,802 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 355 [2023-08-31 04:11:50,803 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:11:51,265 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (select |c_#memory_int| c_~f~0.base))) (let ((.cse2 (select .cse0 (+ (* c_~x1~0 4) c_~f~0.offset)))) (and (or (and (or (not (= c_~x1~0 0)) (= (select .cse0 0) c_~x2~0)) (<= c_~x1~0 0)) (and (< 0 c_~x1~0) (<= c_~x1~0 1) (= (select .cse0 4) c_~x2~0))) (= c_~f~0.offset 0) (forall ((v_ArrVal_601 (Array Int Int))) (let ((.cse1 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_601) c_~f~0.base))) (= (select .cse1 (+ c_~f~0.offset (* .cse2 4))) (select .cse1 (+ c_~f~0.offset (* (select .cse1 (+ c_~f~0.offset (* 4 (select .cse1 (+ (* c_~x2~0 4) c_~f~0.offset))))) 4)))))) (= c_~x2~0 .cse2)))) is different from false [2023-08-31 04:11:51,383 WARN L839 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_601 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_601) c_~f~0.base))) (= (select .cse0 (+ (* c_~x1~0 4) c_~f~0.offset)) (select .cse0 (+ c_~f~0.offset (* (select .cse0 (+ c_~f~0.offset (* 4 (select .cse0 (+ (* c_~x2~0 4) c_~f~0.offset))))) 4)))))) (= c_~x1~0 c_~x2~0)) is different from false [2023-08-31 04:11:51,487 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse1 (select (select |c_#memory_int| c_~f~0.base) (+ (* c_~x1~0 4) c_~f~0.offset)))) (and (forall ((v_ArrVal_601 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_601) c_~f~0.base))) (= (select .cse0 (+ c_~f~0.offset (* .cse1 4))) (select .cse0 (+ c_~f~0.offset (* (select .cse0 (+ c_~f~0.offset (* 4 (select .cse0 (+ (* c_~x2~0 4) c_~f~0.offset))))) 4)))))) (= c_~x2~0 .cse1))) is different from false [2023-08-31 04:11:52,719 INFO L130 PetriNetUnfolder]: 3027/5421 cut-off events. [2023-08-31 04:11:52,719 INFO L131 PetriNetUnfolder]: For 69396/69505 co-relation queries the response was YES. [2023-08-31 04:11:52,738 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40597 conditions, 5421 events. 3027/5421 cut-off events. For 69396/69505 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 37425 event pairs, 534 based on Foata normal form. 105/5497 useless extension candidates. Maximal degree in co-relation 39444. Up to 3923 conditions per place. [2023-08-31 04:11:52,765 INFO L137 encePairwiseOnDemand]: 344/355 looper letters, 374 selfloop transitions, 277 changer transitions 2/659 dead transitions. [2023-08-31 04:11:52,765 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 659 transitions, 13032 flow [2023-08-31 04:11:52,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-08-31 04:11:52,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-08-31 04:11:52,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 2237 transitions. [2023-08-31 04:11:52,769 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3150704225352113 [2023-08-31 04:11:52,769 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 2237 transitions. [2023-08-31 04:11:52,769 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 2237 transitions. [2023-08-31 04:11:52,769 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:11:52,770 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 2237 transitions. [2023-08-31 04:11:52,772 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 111.85) internal successors, (2237), 20 states have internal predecessors, (2237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:11:52,777 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 355.0) internal successors, (7455), 21 states have internal predecessors, (7455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:11:52,777 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 355.0) internal successors, (7455), 21 states have internal predecessors, (7455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:11:52,777 INFO L175 Difference]: Start difference. First operand has 210 places, 532 transitions, 9655 flow. Second operand 20 states and 2237 transitions. [2023-08-31 04:11:52,778 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 659 transitions, 13032 flow [2023-08-31 04:11:53,062 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 659 transitions, 12405 flow, removed 267 selfloop flow, removed 8 redundant places. [2023-08-31 04:11:53,071 INFO L231 Difference]: Finished difference. Result has 229 places, 612 transitions, 11673 flow [2023-08-31 04:11:53,072 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=9088, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=532, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=208, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=285, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=11673, PETRI_PLACES=229, PETRI_TRANSITIONS=612} [2023-08-31 04:11:53,072 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 208 predicate places. [2023-08-31 04:11:53,072 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 612 transitions, 11673 flow [2023-08-31 04:11:53,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 107.70833333333333) internal successors, (2585), 24 states have internal predecessors, (2585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:11:53,073 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:11:53,073 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:11:53,079 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-08-31 04:11:53,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:11:53,273 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:11:53,274 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:11:53,274 INFO L85 PathProgramCache]: Analyzing trace with hash 1672839587, now seen corresponding path program 13 times [2023-08-31 04:11:53,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:11:53,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791924762] [2023-08-31 04:11:53,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:11:53,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:11:53,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:11:53,495 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:11:53,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:11:53,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791924762] [2023-08-31 04:11:53,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791924762] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 04:11:53,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078590332] [2023-08-31 04:11:53,496 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-31 04:11:53,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:11:53,496 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:11:53,498 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 04:11:53,500 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-08-31 04:11:53,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:11:53,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-31 04:11:53,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 04:11:53,711 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:11:53,711 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 04:11:53,843 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:11:53,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1078590332] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 04:11:53,843 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 04:11:53,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2023-08-31 04:11:53,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991021482] [2023-08-31 04:11:53,843 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 04:11:53,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-31 04:11:53,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:11:53,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-31 04:11:53,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2023-08-31 04:11:54,060 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 355 [2023-08-31 04:11:54,061 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 612 transitions, 11673 flow. Second operand has 16 states, 16 states have (on average 143.3125) internal successors, (2293), 16 states have internal predecessors, (2293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:11:54,061 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:11:54,061 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 355 [2023-08-31 04:11:54,061 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:11:58,494 INFO L130 PetriNetUnfolder]: 7528/13638 cut-off events. [2023-08-31 04:11:58,494 INFO L131 PetriNetUnfolder]: For 220962/220962 co-relation queries the response was YES. [2023-08-31 04:11:58,557 INFO L83 FinitePrefix]: Finished finitePrefix Result has 121861 conditions, 13638 events. 7528/13638 cut-off events. For 220962/220962 co-relation queries the response was YES. Maximal size of possible extension queue 706. Compared 108546 event pairs, 1008 based on Foata normal form. 154/13792 useless extension candidates. Maximal degree in co-relation 120355. Up to 7628 conditions per place. [2023-08-31 04:11:58,611 INFO L137 encePairwiseOnDemand]: 350/355 looper letters, 862 selfloop transitions, 501 changer transitions 0/1363 dead transitions. [2023-08-31 04:11:58,611 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 1363 transitions, 28567 flow [2023-08-31 04:11:58,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-31 04:11:58,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-31 04:11:58,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2682 transitions. [2023-08-31 04:11:58,613 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4197183098591549 [2023-08-31 04:11:58,614 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2682 transitions. [2023-08-31 04:11:58,614 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2682 transitions. [2023-08-31 04:11:58,614 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:11:58,615 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2682 transitions. [2023-08-31 04:11:58,618 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 149.0) internal successors, (2682), 18 states have internal predecessors, (2682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:11:58,621 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 355.0) internal successors, (6745), 19 states have internal predecessors, (6745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:11:58,622 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 355.0) internal successors, (6745), 19 states have internal predecessors, (6745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:11:58,622 INFO L175 Difference]: Start difference. First operand has 229 places, 612 transitions, 11673 flow. Second operand 18 states and 2682 transitions. [2023-08-31 04:11:58,622 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 1363 transitions, 28567 flow [2023-08-31 04:11:59,303 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 1363 transitions, 27171 flow, removed 510 selfloop flow, removed 11 redundant places. [2023-08-31 04:11:59,321 INFO L231 Difference]: Finished difference. Result has 245 places, 954 transitions, 20391 flow [2023-08-31 04:11:59,321 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=10930, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=612, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=251, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=304, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=20391, PETRI_PLACES=245, PETRI_TRANSITIONS=954} [2023-08-31 04:11:59,321 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 224 predicate places. [2023-08-31 04:11:59,321 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 954 transitions, 20391 flow [2023-08-31 04:11:59,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 143.3125) internal successors, (2293), 16 states have internal predecessors, (2293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:11:59,322 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:11:59,322 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:11:59,327 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-08-31 04:11:59,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-08-31 04:11:59,523 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:11:59,523 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:11:59,523 INFO L85 PathProgramCache]: Analyzing trace with hash 433078486, now seen corresponding path program 14 times [2023-08-31 04:11:59,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:11:59,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004733581] [2023-08-31 04:11:59,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:11:59,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:11:59,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:11:59,709 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:11:59,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:11:59,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004733581] [2023-08-31 04:11:59,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004733581] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 04:11:59,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096521479] [2023-08-31 04:11:59,709 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 04:11:59,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:11:59,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:11:59,713 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 04:11:59,744 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-08-31 04:11:59,944 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 04:11:59,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 04:11:59,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-31 04:11:59,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 04:12:02,082 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:12:02,082 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 04:12:02,282 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:12:02,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2096521479] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 04:12:02,282 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 04:12:02,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2023-08-31 04:12:02,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557026368] [2023-08-31 04:12:02,282 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 04:12:02,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-31 04:12:02,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:12:02,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-31 04:12:02,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2023-08-31 04:12:02,889 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 355 [2023-08-31 04:12:02,890 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 954 transitions, 20391 flow. Second operand has 16 states, 16 states have (on average 143.0) internal successors, (2288), 16 states have internal predecessors, (2288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:12:02,891 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:12:02,891 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 355 [2023-08-31 04:12:02,891 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:12:08,074 INFO L130 PetriNetUnfolder]: 7595/14027 cut-off events. [2023-08-31 04:12:08,074 INFO L131 PetriNetUnfolder]: For 334472/334472 co-relation queries the response was YES. [2023-08-31 04:12:08,163 INFO L83 FinitePrefix]: Finished finitePrefix Result has 135414 conditions, 14027 events. 7595/14027 cut-off events. For 334472/334472 co-relation queries the response was YES. Maximal size of possible extension queue 774. Compared 116466 event pairs, 1254 based on Foata normal form. 137/14164 useless extension candidates. Maximal degree in co-relation 133825. Up to 7940 conditions per place. [2023-08-31 04:12:08,229 INFO L137 encePairwiseOnDemand]: 349/355 looper letters, 1176 selfloop transitions, 358 changer transitions 46/1580 dead transitions. [2023-08-31 04:12:08,229 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 1580 transitions, 36899 flow [2023-08-31 04:12:08,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-31 04:12:08,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-31 04:12:08,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 2347 transitions. [2023-08-31 04:12:08,233 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41320422535211265 [2023-08-31 04:12:08,233 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 2347 transitions. [2023-08-31 04:12:08,233 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 2347 transitions. [2023-08-31 04:12:08,234 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:12:08,234 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 2347 transitions. [2023-08-31 04:12:08,237 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 146.6875) internal successors, (2347), 16 states have internal predecessors, (2347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:12:08,240 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 355.0) internal successors, (6035), 17 states have internal predecessors, (6035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:12:08,241 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 355.0) internal successors, (6035), 17 states have internal predecessors, (6035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:12:08,241 INFO L175 Difference]: Start difference. First operand has 245 places, 954 transitions, 20391 flow. Second operand 16 states and 2347 transitions. [2023-08-31 04:12:08,241 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 1580 transitions, 36899 flow [2023-08-31 04:12:09,719 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 1580 transitions, 35393 flow, removed 626 selfloop flow, removed 4 redundant places. [2023-08-31 04:12:09,743 INFO L231 Difference]: Finished difference. Result has 262 places, 1124 transitions, 23917 flow [2023-08-31 04:12:09,744 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=19322, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=954, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=190, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=716, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=23917, PETRI_PLACES=262, PETRI_TRANSITIONS=1124} [2023-08-31 04:12:09,744 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 241 predicate places. [2023-08-31 04:12:09,744 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 1124 transitions, 23917 flow [2023-08-31 04:12:09,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 143.0) internal successors, (2288), 16 states have internal predecessors, (2288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:12:09,745 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:12:09,745 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:12:09,750 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-08-31 04:12:09,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:12:09,950 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:12:09,951 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:12:09,951 INFO L85 PathProgramCache]: Analyzing trace with hash -759470750, now seen corresponding path program 15 times [2023-08-31 04:12:09,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:12:09,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019209315] [2023-08-31 04:12:09,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:12:09,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:12:09,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:12:10,153 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:12:10,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:12:10,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019209315] [2023-08-31 04:12:10,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019209315] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 04:12:10,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1902689681] [2023-08-31 04:12:10,153 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 04:12:10,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:12:10,154 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:12:10,157 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 04:12:10,181 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-08-31 04:12:10,345 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-31 04:12:10,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 04:12:10,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-31 04:12:10,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 04:12:10,557 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:12:10,557 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 04:12:10,814 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:12:10,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1902689681] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 04:12:10,814 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 04:12:10,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2023-08-31 04:12:10,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584470941] [2023-08-31 04:12:10,815 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 04:12:10,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-31 04:12:10,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:12:10,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-31 04:12:10,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2023-08-31 04:12:11,403 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 355 [2023-08-31 04:12:11,404 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 1124 transitions, 23917 flow. Second operand has 19 states, 19 states have (on average 142.78947368421052) internal successors, (2713), 19 states have internal predecessors, (2713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:12:11,404 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:12:11,404 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 355 [2023-08-31 04:12:11,405 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:12:19,806 INFO L130 PetriNetUnfolder]: 8188/16762 cut-off events. [2023-08-31 04:12:19,806 INFO L131 PetriNetUnfolder]: For 433289/433289 co-relation queries the response was YES. [2023-08-31 04:12:19,926 INFO L83 FinitePrefix]: Finished finitePrefix Result has 168836 conditions, 16762 events. 8188/16762 cut-off events. For 433289/433289 co-relation queries the response was YES. Maximal size of possible extension queue 1034. Compared 159090 event pairs, 1263 based on Foata normal form. 70/16832 useless extension candidates. Maximal degree in co-relation 166719. Up to 9691 conditions per place. [2023-08-31 04:12:20,118 INFO L137 encePairwiseOnDemand]: 349/355 looper letters, 1153 selfloop transitions, 831 changer transitions 11/1995 dead transitions. [2023-08-31 04:12:20,118 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 1995 transitions, 47822 flow [2023-08-31 04:12:20,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-08-31 04:12:20,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-08-31 04:12:20,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 5126 transitions. [2023-08-31 04:12:20,122 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4125553319919517 [2023-08-31 04:12:20,122 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 5126 transitions. [2023-08-31 04:12:20,122 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 5126 transitions. [2023-08-31 04:12:20,123 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:12:20,123 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 5126 transitions. [2023-08-31 04:12:20,129 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 146.45714285714286) internal successors, (5126), 35 states have internal predecessors, (5126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:12:20,137 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 355.0) internal successors, (12780), 36 states have internal predecessors, (12780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:12:20,138 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 355.0) internal successors, (12780), 36 states have internal predecessors, (12780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:12:20,139 INFO L175 Difference]: Start difference. First operand has 262 places, 1124 transitions, 23917 flow. Second operand 35 states and 5126 transitions. [2023-08-31 04:12:20,139 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 1995 transitions, 47822 flow [2023-08-31 04:12:22,641 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 1995 transitions, 46484 flow, removed 669 selfloop flow, removed 2 redundant places. [2023-08-31 04:12:22,673 INFO L231 Difference]: Finished difference. Result has 306 places, 1579 transitions, 37472 flow [2023-08-31 04:12:22,674 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=22833, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=389, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=415, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=37472, PETRI_PLACES=306, PETRI_TRANSITIONS=1579} [2023-08-31 04:12:22,674 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 285 predicate places. [2023-08-31 04:12:22,674 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 1579 transitions, 37472 flow [2023-08-31 04:12:22,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 142.78947368421052) internal successors, (2713), 19 states have internal predecessors, (2713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:12:22,675 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:12:22,675 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:12:22,680 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-08-31 04:12:22,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:12:22,876 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:12:22,876 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:12:22,876 INFO L85 PathProgramCache]: Analyzing trace with hash 2012161717, now seen corresponding path program 16 times [2023-08-31 04:12:22,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:12:22,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781365411] [2023-08-31 04:12:22,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:12:22,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:12:22,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:12:23,113 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:12:23,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:12:23,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781365411] [2023-08-31 04:12:23,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781365411] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 04:12:23,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231975991] [2023-08-31 04:12:23,113 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-31 04:12:23,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:12:23,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:12:23,114 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 04:12:23,116 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-08-31 04:12:23,208 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-31 04:12:23,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 04:12:23,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-31 04:12:23,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 04:12:23,327 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:12:23,327 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 04:12:23,490 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:12:23,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1231975991] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 04:12:23,491 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 04:12:23,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2023-08-31 04:12:23,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310856860] [2023-08-31 04:12:23,491 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 04:12:23,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-31 04:12:23,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:12:23,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-31 04:12:23,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2023-08-31 04:12:23,959 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 355 [2023-08-31 04:12:23,960 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 1579 transitions, 37472 flow. Second operand has 18 states, 18 states have (on average 143.16666666666666) internal successors, (2577), 18 states have internal predecessors, (2577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:12:23,960 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:12:23,960 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 355 [2023-08-31 04:12:23,960 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:12:33,864 INFO L130 PetriNetUnfolder]: 8585/17343 cut-off events. [2023-08-31 04:12:33,864 INFO L131 PetriNetUnfolder]: For 514913/514913 co-relation queries the response was YES. [2023-08-31 04:12:33,989 INFO L83 FinitePrefix]: Finished finitePrefix Result has 181331 conditions, 17343 events. 8585/17343 cut-off events. For 514913/514913 co-relation queries the response was YES. Maximal size of possible extension queue 1086. Compared 162293 event pairs, 1696 based on Foata normal form. 154/17497 useless extension candidates. Maximal degree in co-relation 180962. Up to 9792 conditions per place. [2023-08-31 04:12:34,075 INFO L137 encePairwiseOnDemand]: 350/355 looper letters, 1094 selfloop transitions, 994 changer transitions 0/2088 dead transitions. [2023-08-31 04:12:34,075 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 2088 transitions, 50894 flow [2023-08-31 04:12:34,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-31 04:12:34,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-31 04:12:34,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 3414 transitions. [2023-08-31 04:12:34,079 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4181261481935089 [2023-08-31 04:12:34,079 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 3414 transitions. [2023-08-31 04:12:34,079 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 3414 transitions. [2023-08-31 04:12:34,080 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:12:34,080 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 3414 transitions. [2023-08-31 04:12:34,083 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 148.43478260869566) internal successors, (3414), 23 states have internal predecessors, (3414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:12:34,087 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 355.0) internal successors, (8520), 24 states have internal predecessors, (8520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:12:34,088 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 355.0) internal successors, (8520), 24 states have internal predecessors, (8520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:12:34,088 INFO L175 Difference]: Start difference. First operand has 306 places, 1579 transitions, 37472 flow. Second operand 23 states and 3414 transitions. [2023-08-31 04:12:34,089 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 2088 transitions, 50894 flow [2023-08-31 04:12:37,718 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 2088 transitions, 48314 flow, removed 780 selfloop flow, removed 13 redundant places. [2023-08-31 04:12:37,761 INFO L231 Difference]: Finished difference. Result has 322 places, 1672 transitions, 39310 flow [2023-08-31 04:12:37,762 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=34832, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1577, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=899, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=632, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=39310, PETRI_PLACES=322, PETRI_TRANSITIONS=1672} [2023-08-31 04:12:37,762 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 301 predicate places. [2023-08-31 04:12:37,763 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 1672 transitions, 39310 flow [2023-08-31 04:12:37,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 143.16666666666666) internal successors, (2577), 18 states have internal predecessors, (2577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:12:37,763 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:12:37,763 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:12:37,767 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-08-31 04:12:37,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:12:37,964 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:12:37,964 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:12:37,964 INFO L85 PathProgramCache]: Analyzing trace with hash 137924603, now seen corresponding path program 17 times [2023-08-31 04:12:37,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:12:37,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300838157] [2023-08-31 04:12:37,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:12:37,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:12:37,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:12:38,252 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:12:38,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:12:38,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300838157] [2023-08-31 04:12:38,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300838157] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 04:12:38,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1902362690] [2023-08-31 04:12:38,253 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-31 04:12:38,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:12:38,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:12:38,257 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 04:12:38,283 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-08-31 04:12:38,374 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-31 04:12:38,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 04:12:38,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-31 04:12:38,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 04:12:38,462 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:12:38,462 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 04:12:38,645 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:12:38,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1902362690] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 04:12:38,646 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 04:12:38,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2023-08-31 04:12:38,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674702954] [2023-08-31 04:12:38,646 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 04:12:38,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-31 04:12:38,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:12:38,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-31 04:12:38,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2023-08-31 04:12:38,969 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 355 [2023-08-31 04:12:38,970 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 1672 transitions, 39310 flow. Second operand has 19 states, 19 states have (on average 142.94736842105263) internal successors, (2716), 19 states have internal predecessors, (2716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:12:38,970 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:12:38,970 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 355 [2023-08-31 04:12:38,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:12:49,902 INFO L130 PetriNetUnfolder]: 8813/17735 cut-off events. [2023-08-31 04:12:49,903 INFO L131 PetriNetUnfolder]: For 620448/620448 co-relation queries the response was YES. [2023-08-31 04:12:50,040 INFO L83 FinitePrefix]: Finished finitePrefix Result has 190818 conditions, 17735 events. 8813/17735 cut-off events. For 620448/620448 co-relation queries the response was YES. Maximal size of possible extension queue 1113. Compared 166015 event pairs, 1565 based on Foata normal form. 102/17837 useless extension candidates. Maximal degree in co-relation 189417. Up to 9959 conditions per place. [2023-08-31 04:12:50,133 INFO L137 encePairwiseOnDemand]: 350/355 looper letters, 1026 selfloop transitions, 1174 changer transitions 0/2200 dead transitions. [2023-08-31 04:12:50,133 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 360 places, 2200 transitions, 53176 flow [2023-08-31 04:12:50,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-08-31 04:12:50,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2023-08-31 04:12:50,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 5742 transitions. [2023-08-31 04:12:50,140 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41473456121343444 [2023-08-31 04:12:50,140 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 5742 transitions. [2023-08-31 04:12:50,140 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 5742 transitions. [2023-08-31 04:12:50,142 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:12:50,142 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 5742 transitions. [2023-08-31 04:12:50,149 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 147.23076923076923) internal successors, (5742), 39 states have internal predecessors, (5742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:12:50,158 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 355.0) internal successors, (14200), 40 states have internal predecessors, (14200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:12:50,160 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 355.0) internal successors, (14200), 40 states have internal predecessors, (14200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:12:50,160 INFO L175 Difference]: Start difference. First operand has 322 places, 1672 transitions, 39310 flow. Second operand 39 states and 5742 transitions. [2023-08-31 04:12:50,161 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 360 places, 2200 transitions, 53176 flow [2023-08-31 04:12:54,139 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 2200 transitions, 52115 flow, removed 371 selfloop flow, removed 5 redundant places. [2023-08-31 04:12:54,180 INFO L231 Difference]: Finished difference. Result has 361 places, 1761 transitions, 42896 flow [2023-08-31 04:12:54,182 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=38363, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1672, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1085, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=556, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=42896, PETRI_PLACES=361, PETRI_TRANSITIONS=1761} [2023-08-31 04:12:54,182 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 340 predicate places. [2023-08-31 04:12:54,182 INFO L495 AbstractCegarLoop]: Abstraction has has 361 places, 1761 transitions, 42896 flow [2023-08-31 04:12:54,183 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 142.94736842105263) internal successors, (2716), 19 states have internal predecessors, (2716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:12:54,183 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:12:54,183 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:12:54,188 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-08-31 04:12:54,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-08-31 04:12:54,384 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:12:54,384 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:12:54,384 INFO L85 PathProgramCache]: Analyzing trace with hash -1497674120, now seen corresponding path program 18 times [2023-08-31 04:12:54,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:12:54,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005602662] [2023-08-31 04:12:54,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:12:54,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:12:54,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:12:54,580 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:12:54,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:12:54,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005602662] [2023-08-31 04:12:54,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005602662] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 04:12:54,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993769814] [2023-08-31 04:12:54,580 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-31 04:12:54,580 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:12:54,580 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:12:54,585 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 04:12:54,593 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-08-31 04:12:54,816 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-31 04:12:54,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 04:12:54,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-31 04:12:54,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 04:12:54,890 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:12:54,891 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 04:12:55,116 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:12:55,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1993769814] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 04:12:55,117 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 04:12:55,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2023-08-31 04:12:55,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935210643] [2023-08-31 04:12:55,117 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 04:12:55,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-31 04:12:55,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:12:55,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-31 04:12:55,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2023-08-31 04:12:55,687 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 355 [2023-08-31 04:12:55,688 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 361 places, 1761 transitions, 42896 flow. Second operand has 20 states, 20 states have (on average 142.65) internal successors, (2853), 20 states have internal predecessors, (2853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:12:55,688 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:12:55,688 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 355 [2023-08-31 04:12:55,688 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:13:06,418 INFO L130 PetriNetUnfolder]: 8841/17774 cut-off events. [2023-08-31 04:13:06,418 INFO L131 PetriNetUnfolder]: For 721283/721283 co-relation queries the response was YES. [2023-08-31 04:13:06,679 INFO L83 FinitePrefix]: Finished finitePrefix Result has 198994 conditions, 17774 events. 8841/17774 cut-off events. For 721283/721283 co-relation queries the response was YES. Maximal size of possible extension queue 1109. Compared 166448 event pairs, 3740 based on Foata normal form. 26/17800 useless extension candidates. Maximal degree in co-relation 197993. Up to 14311 conditions per place. [2023-08-31 04:13:06,796 INFO L137 encePairwiseOnDemand]: 349/355 looper letters, 1343 selfloop transitions, 568 changer transitions 0/1911 dead transitions. [2023-08-31 04:13:06,796 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 388 places, 1911 transitions, 49160 flow [2023-08-31 04:13:06,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-08-31 04:13:06,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-08-31 04:13:06,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 4097 transitions. [2023-08-31 04:13:06,801 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41217303822937623 [2023-08-31 04:13:06,801 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 4097 transitions. [2023-08-31 04:13:06,801 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 4097 transitions. [2023-08-31 04:13:06,802 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:13:06,802 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 4097 transitions. [2023-08-31 04:13:06,806 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 146.32142857142858) internal successors, (4097), 28 states have internal predecessors, (4097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:13:06,812 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 355.0) internal successors, (10295), 29 states have internal predecessors, (10295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:13:06,812 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 355.0) internal successors, (10295), 29 states have internal predecessors, (10295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:13:06,812 INFO L175 Difference]: Start difference. First operand has 361 places, 1761 transitions, 42896 flow. Second operand 28 states and 4097 transitions. [2023-08-31 04:13:06,813 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 388 places, 1911 transitions, 49160 flow [2023-08-31 04:13:11,717 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 1911 transitions, 46043 flow, removed 339 selfloop flow, removed 31 redundant places. [2023-08-31 04:13:11,759 INFO L231 Difference]: Finished difference. Result has 367 places, 1783 transitions, 41633 flow [2023-08-31 04:13:11,761 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=39756, PETRI_DIFFERENCE_MINUEND_PLACES=330, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1757, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=542, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=41633, PETRI_PLACES=367, PETRI_TRANSITIONS=1783} [2023-08-31 04:13:11,761 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 346 predicate places. [2023-08-31 04:13:11,761 INFO L495 AbstractCegarLoop]: Abstraction has has 367 places, 1783 transitions, 41633 flow [2023-08-31 04:13:11,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 142.65) internal successors, (2853), 20 states have internal predecessors, (2853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:13:11,762 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:13:11,762 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:13:11,770 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-08-31 04:13:11,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-08-31 04:13:11,967 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:13:11,968 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:13:11,968 INFO L85 PathProgramCache]: Analyzing trace with hash 542179494, now seen corresponding path program 19 times [2023-08-31 04:13:11,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:13:11,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439852415] [2023-08-31 04:13:11,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:13:11,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:13:11,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:13:12,165 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:13:12,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:13:12,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439852415] [2023-08-31 04:13:12,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439852415] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 04:13:12,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965512453] [2023-08-31 04:13:12,165 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-31 04:13:12,165 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:13:12,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:13:12,169 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 04:13:12,201 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-08-31 04:13:12,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:13:12,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-31 04:13:12,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 04:13:12,382 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:13:12,382 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 04:13:12,783 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:13:12,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [965512453] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 04:13:12,784 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 04:13:12,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2023-08-31 04:13:12,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9890517] [2023-08-31 04:13:12,784 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 04:13:12,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-31 04:13:12,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:13:12,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-31 04:13:12,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2023-08-31 04:13:13,292 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 355 [2023-08-31 04:13:13,294 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 367 places, 1783 transitions, 41633 flow. Second operand has 19 states, 19 states have (on average 142.68421052631578) internal successors, (2711), 19 states have internal predecessors, (2711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:13:13,294 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:13:13,294 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 355 [2023-08-31 04:13:13,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:13:32,857 INFO L130 PetriNetUnfolder]: 9165/18413 cut-off events. [2023-08-31 04:13:32,857 INFO L131 PetriNetUnfolder]: For 782861/782861 co-relation queries the response was YES. [2023-08-31 04:13:32,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 208532 conditions, 18413 events. 9165/18413 cut-off events. For 782861/782861 co-relation queries the response was YES. Maximal size of possible extension queue 1135. Compared 173145 event pairs, 4153 based on Foata normal form. 42/18455 useless extension candidates. Maximal degree in co-relation 206574. Up to 16857 conditions per place. [2023-08-31 04:13:33,070 INFO L137 encePairwiseOnDemand]: 349/355 looper letters, 1643 selfloop transitions, 414 changer transitions 2/2059 dead transitions. [2023-08-31 04:13:33,070 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 405 places, 2059 transitions, 51260 flow [2023-08-31 04:13:33,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-08-31 04:13:33,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2023-08-31 04:13:33,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 5685 transitions. [2023-08-31 04:13:33,075 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4106175514626219 [2023-08-31 04:13:33,075 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 5685 transitions. [2023-08-31 04:13:33,075 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 5685 transitions. [2023-08-31 04:13:33,076 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:13:33,076 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 5685 transitions. [2023-08-31 04:13:33,082 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 145.76923076923077) internal successors, (5685), 39 states have internal predecessors, (5685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:13:33,090 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 355.0) internal successors, (14200), 40 states have internal predecessors, (14200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:13:33,091 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 355.0) internal successors, (14200), 40 states have internal predecessors, (14200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:13:33,091 INFO L175 Difference]: Start difference. First operand has 367 places, 1783 transitions, 41633 flow. Second operand 39 states and 5685 transitions. [2023-08-31 04:13:33,091 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 405 places, 2059 transitions, 51260 flow [2023-08-31 04:13:37,961 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 394 places, 2059 transitions, 50418 flow, removed 117 selfloop flow, removed 11 redundant places. [2023-08-31 04:13:37,997 INFO L231 Difference]: Finished difference. Result has 418 places, 1923 transitions, 45467 flow [2023-08-31 04:13:37,998 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=40876, PETRI_DIFFERENCE_MINUEND_PLACES=356, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1782, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=281, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1441, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=45467, PETRI_PLACES=418, PETRI_TRANSITIONS=1923} [2023-08-31 04:13:37,999 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 397 predicate places. [2023-08-31 04:13:37,999 INFO L495 AbstractCegarLoop]: Abstraction has has 418 places, 1923 transitions, 45467 flow [2023-08-31 04:13:38,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 142.68421052631578) internal successors, (2711), 19 states have internal predecessors, (2711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:13:38,000 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:13:38,000 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:13:38,005 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-08-31 04:13:38,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-08-31 04:13:38,205 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:13:38,205 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:13:38,205 INFO L85 PathProgramCache]: Analyzing trace with hash -1052433547, now seen corresponding path program 20 times [2023-08-31 04:13:38,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:13:38,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837451443] [2023-08-31 04:13:38,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:13:38,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:13:38,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:13:38,345 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:13:38,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:13:38,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837451443] [2023-08-31 04:13:38,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837451443] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 04:13:38,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027672598] [2023-08-31 04:13:38,346 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 04:13:38,346 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:13:38,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:13:38,347 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 04:13:38,348 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-08-31 04:13:38,486 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 04:13:38,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 04:13:38,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-31 04:13:38,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 04:13:38,549 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:13:38,550 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 04:13:38,841 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:13:38,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1027672598] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 04:13:38,842 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 04:13:38,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2023-08-31 04:13:38,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212820876] [2023-08-31 04:13:38,842 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 04:13:38,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-31 04:13:38,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:13:38,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-31 04:13:38,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2023-08-31 04:13:39,125 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 355 [2023-08-31 04:13:39,126 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 418 places, 1923 transitions, 45467 flow. Second operand has 18 states, 18 states have (on average 142.83333333333334) internal successors, (2571), 18 states have internal predecessors, (2571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:13:39,126 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:13:39,126 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 355 [2023-08-31 04:13:39,126 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:13:49,773 WARN L222 SmtUtils]: Spent 9.38s on a formula simplification. DAG size of input: 49 DAG size of output: 45 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-31 04:14:19,134 WARN L222 SmtUtils]: Spent 19.01s on a formula simplification. DAG size of input: 48 DAG size of output: 44 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-31 04:14:28,400 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:14:39,232 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:14:41,240 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:14:43,248 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:14:51,723 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:14:54,675 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:14:57,840 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:15:00,245 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:15:15,711 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:15:29,369 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.72s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:15:31,407 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:15:39,537 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:15:41,585 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:15:45,885 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:16:23,993 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:16:31,745 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:16:33,752 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:16:38,512 INFO L130 PetriNetUnfolder]: 9829/19769 cut-off events. [2023-08-31 04:16:38,513 INFO L131 PetriNetUnfolder]: For 1047493/1047493 co-relation queries the response was YES. [2023-08-31 04:16:38,696 INFO L83 FinitePrefix]: Finished finitePrefix Result has 238634 conditions, 19769 events. 9829/19769 cut-off events. For 1047493/1047493 co-relation queries the response was YES. Maximal size of possible extension queue 1228. Compared 188964 event pairs, 2694 based on Foata normal form. 132/19901 useless extension candidates. Maximal degree in co-relation 238103. Up to 11024 conditions per place. [2023-08-31 04:16:38,786 INFO L137 encePairwiseOnDemand]: 350/355 looper letters, 1231 selfloop transitions, 1188 changer transitions 3/2422 dead transitions. [2023-08-31 04:16:38,786 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 455 places, 2422 transitions, 60201 flow [2023-08-31 04:16:38,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-08-31 04:16:38,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2023-08-31 04:16:38,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 5607 transitions. [2023-08-31 04:16:38,790 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4156412157153447 [2023-08-31 04:16:38,790 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 5607 transitions. [2023-08-31 04:16:38,790 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 5607 transitions. [2023-08-31 04:16:38,790 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:16:38,790 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 5607 transitions. [2023-08-31 04:16:38,795 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 147.55263157894737) internal successors, (5607), 38 states have internal predecessors, (5607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:16:38,799 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 355.0) internal successors, (13845), 39 states have internal predecessors, (13845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:16:38,800 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 355.0) internal successors, (13845), 39 states have internal predecessors, (13845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:16:38,800 INFO L175 Difference]: Start difference. First operand has 418 places, 1923 transitions, 45467 flow. Second operand 38 states and 5607 transitions. [2023-08-31 04:16:38,800 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 455 places, 2422 transitions, 60201 flow [2023-08-31 04:16:49,709 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 451 places, 2422 transitions, 59361 flow, removed 384 selfloop flow, removed 4 redundant places. [2023-08-31 04:16:49,752 INFO L231 Difference]: Finished difference. Result has 461 places, 2054 transitions, 51428 flow [2023-08-31 04:16:49,754 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=44590, PETRI_DIFFERENCE_MINUEND_PLACES=414, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1922, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1061, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=803, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=51428, PETRI_PLACES=461, PETRI_TRANSITIONS=2054} [2023-08-31 04:16:49,755 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 440 predicate places. [2023-08-31 04:16:49,755 INFO L495 AbstractCegarLoop]: Abstraction has has 461 places, 2054 transitions, 51428 flow [2023-08-31 04:16:49,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 142.83333333333334) internal successors, (2571), 18 states have internal predecessors, (2571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:16:49,755 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:16:49,755 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:16:49,763 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-08-31 04:16:49,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:16:49,963 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:16:49,963 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:16:49,963 INFO L85 PathProgramCache]: Analyzing trace with hash -893201905, now seen corresponding path program 21 times [2023-08-31 04:16:49,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:16:49,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256854206] [2023-08-31 04:16:49,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:16:49,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:16:49,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:16:50,139 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:16:50,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:16:50,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256854206] [2023-08-31 04:16:50,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256854206] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 04:16:50,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379643246] [2023-08-31 04:16:50,140 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 04:16:50,140 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:16:50,140 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:16:50,141 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 04:16:50,143 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-08-31 04:16:50,299 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-31 04:16:50,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 04:16:50,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-31 04:16:50,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 04:16:50,370 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:16:50,370 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 04:16:50,542 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:16:50,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1379643246] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 04:16:50,542 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 04:16:50,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2023-08-31 04:16:50,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274235785] [2023-08-31 04:16:50,542 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 04:16:50,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-31 04:16:50,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:16:50,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-31 04:16:50,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2023-08-31 04:16:52,719 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:16:53,020 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 355 [2023-08-31 04:16:53,021 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 461 places, 2054 transitions, 51428 flow. Second operand has 18 states, 18 states have (on average 143.0) internal successors, (2574), 18 states have internal predecessors, (2574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:16:53,022 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:16:53,022 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 355 [2023-08-31 04:16:53,022 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:17:19,567 INFO L130 PetriNetUnfolder]: 10494/20954 cut-off events. [2023-08-31 04:17:19,567 INFO L131 PetriNetUnfolder]: For 1431508/1431508 co-relation queries the response was YES. [2023-08-31 04:17:19,766 INFO L83 FinitePrefix]: Finished finitePrefix Result has 269069 conditions, 20954 events. 10494/20954 cut-off events. For 1431508/1431508 co-relation queries the response was YES. Maximal size of possible extension queue 1332. Compared 201108 event pairs, 2998 based on Foata normal form. 142/21096 useless extension candidates. Maximal degree in co-relation 268541. Up to 11610 conditions per place. [2023-08-31 04:17:19,865 INFO L137 encePairwiseOnDemand]: 350/355 looper letters, 1431 selfloop transitions, 1106 changer transitions 0/2537 dead transitions. [2023-08-31 04:17:19,865 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 488 places, 2537 transitions, 66509 flow [2023-08-31 04:17:19,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-08-31 04:17:19,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-08-31 04:17:19,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 4137 transitions. [2023-08-31 04:17:19,868 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41619718309859155 [2023-08-31 04:17:19,868 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 4137 transitions. [2023-08-31 04:17:19,868 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 4137 transitions. [2023-08-31 04:17:19,868 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:17:19,869 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 4137 transitions. [2023-08-31 04:17:19,871 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 147.75) internal successors, (4137), 28 states have internal predecessors, (4137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:17:19,876 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 355.0) internal successors, (10295), 29 states have internal predecessors, (10295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:17:19,876 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 355.0) internal successors, (10295), 29 states have internal predecessors, (10295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:17:19,876 INFO L175 Difference]: Start difference. First operand has 461 places, 2054 transitions, 51428 flow. Second operand 28 states and 4137 transitions. [2023-08-31 04:17:19,877 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 488 places, 2537 transitions, 66509 flow [2023-08-31 04:17:29,742 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 470 places, 2537 transitions, 65457 flow, removed 288 selfloop flow, removed 18 redundant places. [2023-08-31 04:17:29,787 INFO L231 Difference]: Finished difference. Result has 482 places, 2161 transitions, 56498 flow [2023-08-31 04:17:29,789 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=50279, PETRI_DIFFERENCE_MINUEND_PLACES=443, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2050, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1000, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=979, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=56498, PETRI_PLACES=482, PETRI_TRANSITIONS=2161} [2023-08-31 04:17:29,789 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 461 predicate places. [2023-08-31 04:17:29,789 INFO L495 AbstractCegarLoop]: Abstraction has has 482 places, 2161 transitions, 56498 flow [2023-08-31 04:17:29,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 143.0) internal successors, (2574), 18 states have internal predecessors, (2574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:17:29,790 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:17:29,790 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:17:29,795 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-08-31 04:17:29,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:17:29,991 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:17:29,991 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:17:29,991 INFO L85 PathProgramCache]: Analyzing trace with hash -1285537098, now seen corresponding path program 22 times [2023-08-31 04:17:29,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:17:29,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686134497] [2023-08-31 04:17:29,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:17:29,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:17:30,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:17:30,180 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:17:30,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:17:30,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686134497] [2023-08-31 04:17:30,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686134497] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 04:17:30,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800401619] [2023-08-31 04:17:30,180 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-31 04:17:30,180 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:17:30,180 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:17:30,181 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 04:17:30,183 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-08-31 04:17:30,278 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-31 04:17:30,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 04:17:30,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-31 04:17:30,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 04:17:32,430 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:17:32,431 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 04:17:32,690 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:17:32,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [800401619] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 04:17:32,691 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 04:17:32,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2023-08-31 04:17:32,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526203097] [2023-08-31 04:17:32,691 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 04:17:32,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-31 04:17:32,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:17:32,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-31 04:17:32,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=246, Unknown=1, NotChecked=0, Total=306 [2023-08-31 04:17:34,723 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-08-31 04:17:36,974 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-08-31 04:17:38,998 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-08-31 04:17:41,360 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-08-31 04:17:41,383 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 355 [2023-08-31 04:17:41,385 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 482 places, 2161 transitions, 56498 flow. Second operand has 18 states, 18 states have (on average 139.83333333333334) internal successors, (2517), 18 states have internal predecessors, (2517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:17:41,385 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:17:41,385 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 355 [2023-08-31 04:17:41,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:17:45,021 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-31 04:17:47,636 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-31 04:17:52,175 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:18:06,073 INFO L130 PetriNetUnfolder]: 10682/21606 cut-off events. [2023-08-31 04:18:06,073 INFO L131 PetriNetUnfolder]: For 1555029/1555029 co-relation queries the response was YES. [2023-08-31 04:18:06,339 INFO L83 FinitePrefix]: Finished finitePrefix Result has 284864 conditions, 21606 events. 10682/21606 cut-off events. For 1555029/1555029 co-relation queries the response was YES. Maximal size of possible extension queue 1412. Compared 211940 event pairs, 1971 based on Foata normal form. 107/21713 useless extension candidates. Maximal degree in co-relation 284141. Up to 12019 conditions per place. [2023-08-31 04:18:06,555 INFO L137 encePairwiseOnDemand]: 349/355 looper letters, 1737 selfloop transitions, 884 changer transitions 17/2638 dead transitions. [2023-08-31 04:18:06,556 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 524 places, 2638 transitions, 74894 flow [2023-08-31 04:18:06,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2023-08-31 04:18:06,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2023-08-31 04:18:06,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 6149 transitions. [2023-08-31 04:18:06,561 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4028169014084507 [2023-08-31 04:18:06,561 INFO L72 ComplementDD]: Start complementDD. Operand 43 states and 6149 transitions. [2023-08-31 04:18:06,561 INFO L73 IsDeterministic]: Start isDeterministic. Operand 43 states and 6149 transitions. [2023-08-31 04:18:06,562 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:18:06,563 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 43 states and 6149 transitions. [2023-08-31 04:18:06,568 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 44 states, 43 states have (on average 143.0) internal successors, (6149), 43 states have internal predecessors, (6149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:18:06,576 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 44 states, 44 states have (on average 355.0) internal successors, (15620), 44 states have internal predecessors, (15620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:18:06,577 INFO L81 ComplementDD]: Finished complementDD. Result has 44 states, 44 states have (on average 355.0) internal successors, (15620), 44 states have internal predecessors, (15620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:18:06,577 INFO L175 Difference]: Start difference. First operand has 482 places, 2161 transitions, 56498 flow. Second operand 43 states and 6149 transitions. [2023-08-31 04:18:06,578 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 524 places, 2638 transitions, 74894 flow [2023-08-31 04:18:17,709 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 512 places, 2638 transitions, 73572 flow, removed 369 selfloop flow, removed 12 redundant places. [2023-08-31 04:18:17,758 INFO L231 Difference]: Finished difference. Result has 528 places, 2231 transitions, 60706 flow [2023-08-31 04:18:17,760 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=54585, PETRI_DIFFERENCE_MINUEND_PLACES=470, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=795, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1306, PETRI_DIFFERENCE_SUBTRAHEND_STATES=43, PETRI_FLOW=60706, PETRI_PLACES=528, PETRI_TRANSITIONS=2231} [2023-08-31 04:18:17,760 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 507 predicate places. [2023-08-31 04:18:17,761 INFO L495 AbstractCegarLoop]: Abstraction has has 528 places, 2231 transitions, 60706 flow [2023-08-31 04:18:17,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 139.83333333333334) internal successors, (2517), 18 states have internal predecessors, (2517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:18:17,761 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:18:17,761 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:18:17,766 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-08-31 04:18:17,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2023-08-31 04:18:17,962 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:18:17,962 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:18:17,962 INFO L85 PathProgramCache]: Analyzing trace with hash 535537283, now seen corresponding path program 23 times [2023-08-31 04:18:17,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:18:17,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493208427] [2023-08-31 04:18:17,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:18:17,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:18:17,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:18:18,141 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:18:18,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:18:18,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493208427] [2023-08-31 04:18:18,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493208427] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 04:18:18,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1880427773] [2023-08-31 04:18:18,142 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-31 04:18:18,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:18:18,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:18:18,147 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 04:18:18,149 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-08-31 04:18:18,301 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-31 04:18:18,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 04:18:18,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-31 04:18:18,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 04:18:18,408 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:18:18,408 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 04:18:18,633 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:18:18,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1880427773] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 04:18:18,633 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 04:18:18,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2023-08-31 04:18:18,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113064851] [2023-08-31 04:18:18,634 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 04:18:18,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-31 04:18:18,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:18:18,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-31 04:18:18,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2023-08-31 04:18:18,967 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 355 [2023-08-31 04:18:18,969 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 528 places, 2231 transitions, 60706 flow. Second operand has 19 states, 19 states have (on average 143.10526315789474) internal successors, (2719), 19 states have internal predecessors, (2719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:18:18,969 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:18:18,969 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 355 [2023-08-31 04:18:18,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:18:40,619 WARN L222 SmtUtils]: Spent 8.47s on a formula simplification. DAG size of input: 42 DAG size of output: 40 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-31 04:18:49,137 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:19:08,588 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.61s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:19:23,066 INFO L130 PetriNetUnfolder]: 10787/21693 cut-off events. [2023-08-31 04:19:23,066 INFO L131 PetriNetUnfolder]: For 1826235/1826235 co-relation queries the response was YES. [2023-08-31 04:19:23,335 INFO L83 FinitePrefix]: Finished finitePrefix Result has 301001 conditions, 21693 events. 10787/21693 cut-off events. For 1826235/1826235 co-relation queries the response was YES. Maximal size of possible extension queue 1421. Compared 211387 event pairs, 2843 based on Foata normal form. 42/21735 useless extension candidates. Maximal degree in co-relation 300430. Up to 12000 conditions per place. [2023-08-31 04:19:23,445 INFO L137 encePairwiseOnDemand]: 350/355 looper letters, 1389 selfloop transitions, 1305 changer transitions 0/2694 dead transitions. [2023-08-31 04:19:23,445 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 567 places, 2694 transitions, 75309 flow [2023-08-31 04:19:23,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-08-31 04:19:23,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2023-08-31 04:19:23,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 6175 transitions. [2023-08-31 04:19:23,449 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4141515761234071 [2023-08-31 04:19:23,449 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 6175 transitions. [2023-08-31 04:19:23,449 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 6175 transitions. [2023-08-31 04:19:23,449 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:19:23,449 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 6175 transitions. [2023-08-31 04:19:23,453 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 147.02380952380952) internal successors, (6175), 42 states have internal predecessors, (6175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:19:23,458 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 355.0) internal successors, (15265), 43 states have internal predecessors, (15265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:19:23,459 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 355.0) internal successors, (15265), 43 states have internal predecessors, (15265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:19:23,459 INFO L175 Difference]: Start difference. First operand has 528 places, 2231 transitions, 60706 flow. Second operand 42 states and 6175 transitions. [2023-08-31 04:19:23,459 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 567 places, 2694 transitions, 75309 flow [2023-08-31 04:19:38,522 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 556 places, 2694 transitions, 73387 flow, removed 872 selfloop flow, removed 11 redundant places. [2023-08-31 04:19:38,584 INFO L231 Difference]: Finished difference. Result has 562 places, 2268 transitions, 63319 flow [2023-08-31 04:19:38,585 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=58662, PETRI_DIFFERENCE_MINUEND_PLACES=515, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1261, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=936, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=63319, PETRI_PLACES=562, PETRI_TRANSITIONS=2268} [2023-08-31 04:19:38,586 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 541 predicate places. [2023-08-31 04:19:38,586 INFO L495 AbstractCegarLoop]: Abstraction has has 562 places, 2268 transitions, 63319 flow [2023-08-31 04:19:38,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 143.10526315789474) internal successors, (2719), 19 states have internal predecessors, (2719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:19:38,586 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:19:38,586 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:19:38,591 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2023-08-31 04:19:38,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2023-08-31 04:19:38,787 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:19:38,787 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:19:38,787 INFO L85 PathProgramCache]: Analyzing trace with hash -2023740468, now seen corresponding path program 24 times [2023-08-31 04:19:38,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:19:38,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323922332] [2023-08-31 04:19:38,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:19:38,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:19:38,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:19:38,951 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:19:38,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:19:38,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323922332] [2023-08-31 04:19:38,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323922332] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 04:19:38,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622561560] [2023-08-31 04:19:38,952 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-31 04:19:38,952 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:19:38,952 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:19:38,953 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 04:19:38,954 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-08-31 04:19:39,126 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-31 04:19:39,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 04:19:39,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-31 04:19:39,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 04:19:39,188 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:19:39,189 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 04:19:39,454 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:19:39,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [622561560] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 04:19:39,455 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 04:19:39,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2023-08-31 04:19:39,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550567545] [2023-08-31 04:19:39,455 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 04:19:39,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-31 04:19:39,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:19:39,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-31 04:19:39,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2023-08-31 04:19:40,343 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 355 [2023-08-31 04:19:40,344 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 562 places, 2268 transitions, 63319 flow. Second operand has 19 states, 19 states have (on average 142.68421052631578) internal successors, (2711), 19 states have internal predecessors, (2711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:19:40,344 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:19:40,344 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 355 [2023-08-31 04:19:40,344 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:19:46,126 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:20:02,086 INFO L130 PetriNetUnfolder]: 10852/21848 cut-off events. [2023-08-31 04:20:02,086 INFO L131 PetriNetUnfolder]: For 1840871/1840871 co-relation queries the response was YES. [2023-08-31 04:20:02,338 INFO L83 FinitePrefix]: Finished finitePrefix Result has 305866 conditions, 21848 events. 10852/21848 cut-off events. For 1840871/1840871 co-relation queries the response was YES. Maximal size of possible extension queue 1424. Compared 212874 event pairs, 4775 based on Foata normal form. 47/21895 useless extension candidates. Maximal degree in co-relation 305564. Up to 19967 conditions per place. [2023-08-31 04:20:02,447 INFO L137 encePairwiseOnDemand]: 349/355 looper letters, 1901 selfloop transitions, 514 changer transitions 0/2415 dead transitions. [2023-08-31 04:20:02,447 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 593 places, 2415 transitions, 71605 flow [2023-08-31 04:20:02,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-08-31 04:20:02,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-08-31 04:20:02,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 4960 transitions. [2023-08-31 04:20:02,451 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4109362054681027 [2023-08-31 04:20:02,451 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 4960 transitions. [2023-08-31 04:20:02,451 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 4960 transitions. [2023-08-31 04:20:02,451 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:20:02,451 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 4960 transitions. [2023-08-31 04:20:02,454 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 145.88235294117646) internal successors, (4960), 34 states have internal predecessors, (4960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:20:02,458 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 355.0) internal successors, (12425), 35 states have internal predecessors, (12425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:20:02,459 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 355.0) internal successors, (12425), 35 states have internal predecessors, (12425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:20:02,459 INFO L175 Difference]: Start difference. First operand has 562 places, 2268 transitions, 63319 flow. Second operand 34 states and 4960 transitions. [2023-08-31 04:20:02,459 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 593 places, 2415 transitions, 71605 flow [2023-08-31 04:20:16,725 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 557 places, 2415 transitions, 69689 flow, removed 142 selfloop flow, removed 36 redundant places. [2023-08-31 04:20:16,792 INFO L231 Difference]: Finished difference. Result has 565 places, 2313 transitions, 64447 flow [2023-08-31 04:20:16,794 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=61299, PETRI_DIFFERENCE_MINUEND_PLACES=524, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=465, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1774, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=64447, PETRI_PLACES=565, PETRI_TRANSITIONS=2313} [2023-08-31 04:20:16,795 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 544 predicate places. [2023-08-31 04:20:16,795 INFO L495 AbstractCegarLoop]: Abstraction has has 565 places, 2313 transitions, 64447 flow [2023-08-31 04:20:16,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 142.68421052631578) internal successors, (2711), 19 states have internal predecessors, (2711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:20:16,796 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 04:20:16,796 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 04:20:16,805 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-08-31 04:20:17,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:20:17,005 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 04:20:17,005 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 04:20:17,005 INFO L85 PathProgramCache]: Analyzing trace with hash 1028808052, now seen corresponding path program 25 times [2023-08-31 04:20:17,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 04:20:17,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522967885] [2023-08-31 04:20:17,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 04:20:17,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 04:20:17,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:20:17,212 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:20:17,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 04:20:17,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522967885] [2023-08-31 04:20:17,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522967885] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 04:20:17,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328193762] [2023-08-31 04:20:17,213 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-31 04:20:17,213 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 04:20:17,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 04:20:17,214 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 04:20:17,217 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-08-31 04:20:17,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 04:20:17,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-31 04:20:17,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 04:20:17,413 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:20:17,413 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 04:20:17,630 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 04:20:17,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [328193762] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 04:20:17,631 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 04:20:17,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2023-08-31 04:20:17,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302502420] [2023-08-31 04:20:17,631 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 04:20:17,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-31 04:20:17,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 04:20:17,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-31 04:20:17,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2023-08-31 04:20:18,189 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 355 [2023-08-31 04:20:18,190 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 565 places, 2313 transitions, 64447 flow. Second operand has 20 states, 20 states have (on average 142.75) internal successors, (2855), 20 states have internal predecessors, (2855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:20:18,190 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 04:20:18,190 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 355 [2023-08-31 04:20:18,190 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 04:20:22,129 WARN L839 $PredicateComparison]: unable to prove that (and (let ((.cse0 (* 3 c_~n~0))) (<= (+ (* (div .cse0 4294967296) 4294967296) |c_thread1Thread1of1ForFork0_~i~0#1| 1) .cse0)) (forall ((~n~0 Int)) (let ((.cse1 (mod (* 3 ~n~0) 4294967296))) (or (<= .cse1 (mod |c_thread2Thread1of1ForFork1_~i~1#1| 4294967296)) (< (mod (+ |c_thread1Thread1of1ForFork0_~i~0#1| 1) 4294967296) .cse1)))) (< 0 (+ (div |c_thread1Thread1of1ForFork0_~i~0#1| 4294967296) 1)) (<= (+ (* (div |c_thread2Thread1of1ForFork1_~i~1#1| 4294967296) 4294967296) |c_thread1Thread1of1ForFork0_~i~0#1|) |c_thread2Thread1of1ForFork1_~i~1#1|)) is different from false [2023-08-31 04:20:28,910 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:20:37,872 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:20:42,563 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 04:20:50,141 INFO L130 PetriNetUnfolder]: 12038/24605 cut-off events. [2023-08-31 04:20:50,141 INFO L131 PetriNetUnfolder]: For 2413203/2413203 co-relation queries the response was YES. [2023-08-31 04:20:50,419 INFO L83 FinitePrefix]: Finished finitePrefix Result has 358774 conditions, 24605 events. 12038/24605 cut-off events. For 2413203/2413203 co-relation queries the response was YES. Maximal size of possible extension queue 1677. Compared 248806 event pairs, 5082 based on Foata normal form. 114/24719 useless extension candidates. Maximal degree in co-relation 358034. Up to 20871 conditions per place. [2023-08-31 04:20:50,545 INFO L137 encePairwiseOnDemand]: 345/355 looper letters, 2216 selfloop transitions, 621 changer transitions 3/2840 dead transitions. [2023-08-31 04:20:50,546 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 603 places, 2840 transitions, 86041 flow [2023-08-31 04:20:50,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-08-31 04:20:50,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2023-08-31 04:20:50,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 5739 transitions. [2023-08-31 04:20:50,549 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41451787648970745 [2023-08-31 04:20:50,549 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 5739 transitions. [2023-08-31 04:20:50,549 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 5739 transitions. [2023-08-31 04:20:50,550 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 04:20:50,550 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 5739 transitions. [2023-08-31 04:20:50,553 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 147.15384615384616) internal successors, (5739), 39 states have internal predecessors, (5739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:20:50,558 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 355.0) internal successors, (14200), 40 states have internal predecessors, (14200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:20:50,558 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 355.0) internal successors, (14200), 40 states have internal predecessors, (14200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 04:20:50,558 INFO L175 Difference]: Start difference. First operand has 565 places, 2313 transitions, 64447 flow. Second operand 39 states and 5739 transitions. [2023-08-31 04:20:50,558 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 603 places, 2840 transitions, 86041 flow Killed by 15