./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/chl-poker-hand-symm.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --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/chl-poker-hand-symm.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 83dad307cba3d7607e136206fd160e874fd8a32bc88cbef3e5973f117a7651cc --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-09-01 12:14:05,401 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 12:14:05,404 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 12:14:05,445 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 12:14:05,447 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 12:14:05,450 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 12:14:05,452 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 12:14:05,454 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 12:14:05,456 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 12:14:05,460 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 12:14:05,461 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 12:14:05,463 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 12:14:05,464 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 12:14:05,466 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 12:14:05,467 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 12:14:05,472 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 12:14:05,473 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 12:14:05,474 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 12:14:05,476 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 12:14:05,481 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 12:14:05,488 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 12:14:05,490 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 12:14:05,490 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 12:14:05,491 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 12:14:05,494 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 12:14:05,496 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 12:14:05,496 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 12:14:05,497 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 12:14:05,498 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 12:14:05,499 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 12:14:05,499 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 12:14:05,504 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 12:14:05,506 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 12:14:05,507 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 12:14:05,508 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 12:14:05,508 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 12:14:05,509 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 12:14:05,509 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 12:14:05,510 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 12:14:05,510 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 12:14:05,511 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 12:14:05,512 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-09-01 12:14:05,546 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 12:14:05,547 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 12:14:05,548 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 12:14:05,548 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 12:14:05,549 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 12:14:05,549 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 12:14:05,550 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 12:14:05,550 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 12:14:05,550 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 12:14:05,550 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 12:14:05,551 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 12:14:05,552 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 12:14:05,552 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 12:14:05,552 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 12:14:05,552 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-09-01 12:14:05,552 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 12:14:05,552 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-09-01 12:14:05,553 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 12:14:05,553 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-09-01 12:14:05,554 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 12:14:05,554 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-09-01 12:14:05,558 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 12:14:05,558 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 12:14:05,558 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 12:14:05,559 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 12:14:05,559 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 12:14:05,559 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 12:14:05,559 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-09-01 12:14:05,560 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 12:14:05,560 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 12:14:05,560 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 12:14:05,560 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-09-01 12:14:05,560 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 12:14:05,561 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 12:14:05,561 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 12:14:05,561 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 83dad307cba3d7607e136206fd160e874fd8a32bc88cbef3e5973f117a7651cc Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 12:14:05,854 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 12:14:05,874 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 12:14:05,876 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 12:14:05,878 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 12:14:05,878 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 12:14:05,879 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/chl-poker-hand-symm.wvr.c [2023-09-01 12:14:07,139 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 12:14:07,334 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 12:14:07,335 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-poker-hand-symm.wvr.c [2023-09-01 12:14:07,342 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/058496a6e/099f8681ec1743b693083f87c7d8a3e5/FLAG4adddf4e7 [2023-09-01 12:14:07,360 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/058496a6e/099f8681ec1743b693083f87c7d8a3e5 [2023-09-01 12:14:07,363 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 12:14:07,364 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 12:14:07,366 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 12:14:07,366 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 12:14:07,369 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 12:14:07,369 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 12:14:07" (1/1) ... [2023-09-01 12:14:07,371 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@441b95fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:14:07, skipping insertion in model container [2023-09-01 12:14:07,371 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 12:14:07" (1/1) ... [2023-09-01 12:14:07,377 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 12:14:07,413 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 12:14:07,600 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/chl-poker-hand-symm.wvr.c[12821,12834] [2023-09-01 12:14:07,608 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 12:14:07,616 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 12:14:07,740 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/chl-poker-hand-symm.wvr.c[12821,12834] [2023-09-01 12:14:07,744 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 12:14:07,757 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 12:14:07,759 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 12:14:07,765 INFO L208 MainTranslator]: Completed translation [2023-09-01 12:14:07,766 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:14:07 WrapperNode [2023-09-01 12:14:07,766 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 12:14:07,768 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 12:14:07,768 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 12:14:07,768 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 12:14:07,775 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:14:07" (1/1) ... [2023-09-01 12:14:07,799 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:14:07" (1/1) ... [2023-09-01 12:14:07,868 INFO L138 Inliner]: procedures = 25, calls = 307, calls flagged for inlining = 69, calls inlined = 97, statements flattened = 1546 [2023-09-01 12:14:07,868 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 12:14:07,869 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 12:14:07,869 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 12:14:07,869 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 12:14:07,877 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:14:07" (1/1) ... [2023-09-01 12:14:07,877 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:14:07" (1/1) ... [2023-09-01 12:14:07,883 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:14:07" (1/1) ... [2023-09-01 12:14:07,884 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:14:07" (1/1) ... [2023-09-01 12:14:07,937 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:14:07" (1/1) ... [2023-09-01 12:14:07,964 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:14:07" (1/1) ... [2023-09-01 12:14:07,969 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:14:07" (1/1) ... [2023-09-01 12:14:07,979 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:14:07" (1/1) ... [2023-09-01 12:14:07,991 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 12:14:07,994 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 12:14:07,995 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 12:14:07,995 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 12:14:07,995 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:14:07" (1/1) ... [2023-09-01 12:14:08,001 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 12:14:08,012 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:14:08,025 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) [2023-09-01 12:14:08,060 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 [2023-09-01 12:14:08,077 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 12:14:08,077 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 12:14:08,078 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-09-01 12:14:08,078 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-09-01 12:14:08,078 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-09-01 12:14:08,078 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-09-01 12:14:08,078 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-09-01 12:14:08,078 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-09-01 12:14:08,078 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-09-01 12:14:08,079 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-09-01 12:14:08,079 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-09-01 12:14:08,079 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-09-01 12:14:08,079 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 12:14:08,079 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 12:14:08,079 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 12:14:08,082 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-09-01 12:14:08,297 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 12:14:08,299 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 12:14:09,652 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 12:14:11,127 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 12:14:11,128 INFO L302 CfgBuilder]: Removed 12 assume(true) statements. [2023-09-01 12:14:11,130 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 12:14:11 BoogieIcfgContainer [2023-09-01 12:14:11,130 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 12:14:11,132 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 12:14:11,132 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 12:14:11,135 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 12:14:11,135 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 12:14:07" (1/3) ... [2023-09-01 12:14:11,136 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6451c452 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 12:14:11, skipping insertion in model container [2023-09-01 12:14:11,136 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 12:14:07" (2/3) ... [2023-09-01 12:14:11,136 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6451c452 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 12:14:11, skipping insertion in model container [2023-09-01 12:14:11,136 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 12:14:11" (3/3) ... [2023-09-01 12:14:11,138 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-poker-hand-symm.wvr.c [2023-09-01 12:14:11,146 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-09-01 12:14:11,154 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 12:14:11,154 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-09-01 12:14:11,154 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 12:14:11,408 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-09-01 12:14:11,474 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 409 places, 455 transitions, 926 flow [2023-09-01 12:14:11,645 INFO L130 PetriNetUnfolder]: 53/453 cut-off events. [2023-09-01 12:14:11,646 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 12:14:11,654 INFO L83 FinitePrefix]: Finished finitePrefix Result has 462 conditions, 453 events. 53/453 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 567 event pairs, 0 based on Foata normal form. 0/399 useless extension candidates. Maximal degree in co-relation 375. Up to 7 conditions per place. [2023-09-01 12:14:11,655 INFO L82 GeneralOperation]: Start removeDead. Operand has 409 places, 455 transitions, 926 flow [2023-09-01 12:14:11,664 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 399 places, 445 transitions, 902 flow [2023-09-01 12:14:11,668 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 12:14:11,689 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 399 places, 445 transitions, 902 flow [2023-09-01 12:14:11,695 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 399 places, 445 transitions, 902 flow [2023-09-01 12:14:11,696 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 399 places, 445 transitions, 902 flow [2023-09-01 12:14:11,781 INFO L130 PetriNetUnfolder]: 53/445 cut-off events. [2023-09-01 12:14:11,782 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 12:14:11,786 INFO L83 FinitePrefix]: Finished finitePrefix Result has 454 conditions, 445 events. 53/445 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 567 event pairs, 0 based on Foata normal form. 0/392 useless extension candidates. Maximal degree in co-relation 375. Up to 7 conditions per place. [2023-09-01 12:14:11,791 INFO L119 LiptonReduction]: Number of co-enabled transitions 7700 [2023-09-01 12:15:04,296 INFO L134 LiptonReduction]: Checked pairs total: 7716 [2023-09-01 12:15:04,297 INFO L136 LiptonReduction]: Total number of compositions: 528 [2023-09-01 12:15:04,316 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-09-01 12:15:04,323 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;@3e56d9db, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 12:15:04,323 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-09-01 12:15:04,368 INFO L130 PetriNetUnfolder]: 16/38 cut-off events. [2023-09-01 12:15:04,371 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 12:15:04,372 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:15:04,372 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:15:04,373 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:15:04,377 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:15:04,377 INFO L85 PathProgramCache]: Analyzing trace with hash -1344797690, now seen corresponding path program 1 times [2023-09-01 12:15:04,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:15:04,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374180606] [2023-09-01 12:15:04,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:15:04,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:15:04,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:15:05,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 12:15:05,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:15:05,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374180606] [2023-09-01 12:15:05,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374180606] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 12:15:05,114 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 12:15:05,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 12:15:05,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104688167] [2023-09-01 12:15:05,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:15:05,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 12:15:05,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:15:05,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 12:15:05,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 12:15:05,317 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 367 out of 983 [2023-09-01 12:15:05,325 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 39 transitions, 90 flow. Second operand has 3 states, 3 states have (on average 373.3333333333333) internal successors, (1120), 3 states have internal predecessors, (1120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:15:05,325 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:15:05,325 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 367 of 983 [2023-09-01 12:15:05,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:15:05,897 INFO L130 PetriNetUnfolder]: 133/196 cut-off events. [2023-09-01 12:15:05,897 INFO L131 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2023-09-01 12:15:05,898 INFO L83 FinitePrefix]: Finished finitePrefix Result has 411 conditions, 196 events. 133/196 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 372 event pairs, 45 based on Foata normal form. 0/108 useless extension candidates. Maximal degree in co-relation 308. Up to 193 conditions per place. [2023-09-01 12:15:05,900 INFO L137 encePairwiseOnDemand]: 974/983 looper letters, 35 selfloop transitions, 8 changer transitions 0/43 dead transitions. [2023-09-01 12:15:05,900 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 43 transitions, 184 flow [2023-09-01 12:15:05,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 12:15:05,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 12:15:05,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1148 transitions. [2023-09-01 12:15:05,926 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.389284503221431 [2023-09-01 12:15:05,927 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1148 transitions. [2023-09-01 12:15:05,928 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1148 transitions. [2023-09-01 12:15:05,932 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:15:05,934 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1148 transitions. [2023-09-01 12:15:05,939 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 382.6666666666667) internal successors, (1148), 3 states have internal predecessors, (1148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:15:05,948 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 983.0) internal successors, (3932), 4 states have internal predecessors, (3932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:15:05,950 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 983.0) internal successors, (3932), 4 states have internal predecessors, (3932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:15:05,951 INFO L175 Difference]: Start difference. First operand has 30 places, 39 transitions, 90 flow. Second operand 3 states and 1148 transitions. [2023-09-01 12:15:05,952 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 43 transitions, 184 flow [2023-09-01 12:15:05,955 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 43 transitions, 176 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-09-01 12:15:05,956 INFO L231 Difference]: Finished difference. Result has 29 places, 43 transitions, 124 flow [2023-09-01 12:15:05,958 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=983, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=124, PETRI_PLACES=29, PETRI_TRANSITIONS=43} [2023-09-01 12:15:05,961 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, -1 predicate places. [2023-09-01 12:15:05,961 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 43 transitions, 124 flow [2023-09-01 12:15:05,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 373.3333333333333) internal successors, (1120), 3 states have internal predecessors, (1120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:15:05,962 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:15:05,962 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:15:05,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-09-01 12:15:05,963 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:15:05,963 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:15:05,963 INFO L85 PathProgramCache]: Analyzing trace with hash -1708311211, now seen corresponding path program 1 times [2023-09-01 12:15:05,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:15:05,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213094447] [2023-09-01 12:15:05,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:15:05,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:15:06,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:15:06,284 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 12:15:06,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:15:06,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213094447] [2023-09-01 12:15:06,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213094447] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:15:06,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736320218] [2023-09-01 12:15:06,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:15:06,285 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:15:06,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:15:06,289 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) [2023-09-01 12:15:06,290 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-09-01 12:15:06,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:15:06,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 4 conjunts are in the unsatisfiable core [2023-09-01 12:15:06,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:15:06,934 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-09-01 12:15:06,935 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 12:15:06,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1736320218] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 12:15:06,935 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 12:15:06,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-09-01 12:15:06,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982254464] [2023-09-01 12:15:06,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:15:06,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 12:15:06,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:15:06,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 12:15:06,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-09-01 12:15:07,077 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 367 out of 983 [2023-09-01 12:15:07,081 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 43 transitions, 124 flow. Second operand has 3 states, 3 states have (on average 374.6666666666667) internal successors, (1124), 3 states have internal predecessors, (1124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:15:07,082 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:15:07,082 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 367 of 983 [2023-09-01 12:15:07,082 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:15:07,551 INFO L130 PetriNetUnfolder]: 133/200 cut-off events. [2023-09-01 12:15:07,551 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 12:15:07,552 INFO L83 FinitePrefix]: Finished finitePrefix Result has 426 conditions, 200 events. 133/200 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 373 event pairs, 45 based on Foata normal form. 1/117 useless extension candidates. Maximal degree in co-relation 373. Up to 197 conditions per place. [2023-09-01 12:15:07,553 INFO L137 encePairwiseOnDemand]: 973/983 looper letters, 39 selfloop transitions, 8 changer transitions 0/47 dead transitions. [2023-09-01 12:15:07,553 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 47 transitions, 226 flow [2023-09-01 12:15:07,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 12:15:07,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 12:15:07,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1148 transitions. [2023-09-01 12:15:07,557 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.389284503221431 [2023-09-01 12:15:07,557 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1148 transitions. [2023-09-01 12:15:07,557 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1148 transitions. [2023-09-01 12:15:07,558 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:15:07,558 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1148 transitions. [2023-09-01 12:15:07,561 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 382.6666666666667) internal successors, (1148), 3 states have internal predecessors, (1148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:15:07,566 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 983.0) internal successors, (3932), 4 states have internal predecessors, (3932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:15:07,568 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 983.0) internal successors, (3932), 4 states have internal predecessors, (3932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:15:07,569 INFO L175 Difference]: Start difference. First operand has 29 places, 43 transitions, 124 flow. Second operand 3 states and 1148 transitions. [2023-09-01 12:15:07,569 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 47 transitions, 226 flow [2023-09-01 12:15:07,570 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 47 transitions, 218 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 12:15:07,570 INFO L231 Difference]: Finished difference. Result has 31 places, 47 transitions, 160 flow [2023-09-01 12:15:07,571 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=983, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=160, PETRI_PLACES=31, PETRI_TRANSITIONS=47} [2023-09-01 12:15:07,571 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 1 predicate places. [2023-09-01 12:15:07,572 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 47 transitions, 160 flow [2023-09-01 12:15:07,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 374.6666666666667) internal successors, (1124), 3 states have internal predecessors, (1124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:15:07,573 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:15:07,573 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:15:07,588 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-09-01 12:15:07,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:15:07,782 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:15:07,782 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:15:07,782 INFO L85 PathProgramCache]: Analyzing trace with hash -457718845, now seen corresponding path program 1 times [2023-09-01 12:15:07,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:15:07,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280369891] [2023-09-01 12:15:07,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:15:07,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:15:07,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:15:08,072 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-09-01 12:15:08,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:15:08,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280369891] [2023-09-01 12:15:08,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280369891] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:15:08,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584046550] [2023-09-01 12:15:08,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:15:08,077 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:15:08,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:15:08,079 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) [2023-09-01 12:15:08,081 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-09-01 12:15:08,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:15:08,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 436 conjuncts, 5 conjunts are in the unsatisfiable core [2023-09-01 12:15:08,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:15:08,719 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-09-01 12:15:08,719 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:15:08,748 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-09-01 12:15:08,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1584046550] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:15:08,748 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:15:08,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 8 [2023-09-01 12:15:08,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983568229] [2023-09-01 12:15:08,749 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:15:08,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-09-01 12:15:08,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:15:08,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-09-01 12:15:08,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2023-09-01 12:15:09,085 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 351 out of 983 [2023-09-01 12:15:09,110 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 47 transitions, 160 flow. Second operand has 8 states, 8 states have (on average 355.625) internal successors, (2845), 8 states have internal predecessors, (2845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:15:09,110 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:15:09,110 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 351 of 983 [2023-09-01 12:15:09,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:15:09,632 INFO L130 PetriNetUnfolder]: 133/224 cut-off events. [2023-09-01 12:15:09,633 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-09-01 12:15:09,633 INFO L83 FinitePrefix]: Finished finitePrefix Result has 513 conditions, 224 events. 133/224 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 373 event pairs, 45 based on Foata normal form. 12/152 useless extension candidates. Maximal degree in co-relation 393. Up to 193 conditions per place. [2023-09-01 12:15:09,634 INFO L137 encePairwiseOnDemand]: 966/983 looper letters, 31 selfloop transitions, 40 changer transitions 0/71 dead transitions. [2023-09-01 12:15:09,634 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 71 transitions, 398 flow [2023-09-01 12:15:09,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-09-01 12:15:09,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-09-01 12:15:09,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2903 transitions. [2023-09-01 12:15:09,642 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3691505595116989 [2023-09-01 12:15:09,642 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2903 transitions. [2023-09-01 12:15:09,642 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2903 transitions. [2023-09-01 12:15:09,644 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:15:09,644 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2903 transitions. [2023-09-01 12:15:09,650 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 362.875) internal successors, (2903), 8 states have internal predecessors, (2903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:15:09,663 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 983.0) internal successors, (8847), 9 states have internal predecessors, (8847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:15:09,667 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 983.0) internal successors, (8847), 9 states have internal predecessors, (8847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:15:09,667 INFO L175 Difference]: Start difference. First operand has 31 places, 47 transitions, 160 flow. Second operand 8 states and 2903 transitions. [2023-09-01 12:15:09,667 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 71 transitions, 398 flow [2023-09-01 12:15:09,669 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 71 transitions, 390 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 12:15:09,671 INFO L231 Difference]: Finished difference. Result has 40 places, 71 transitions, 390 flow [2023-09-01 12:15:09,671 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=983, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=390, PETRI_PLACES=40, PETRI_TRANSITIONS=71} [2023-09-01 12:15:09,672 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 10 predicate places. [2023-09-01 12:15:09,672 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 71 transitions, 390 flow [2023-09-01 12:15:09,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 355.625) internal successors, (2845), 8 states have internal predecessors, (2845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:15:09,676 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:15:09,676 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:15:09,695 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-09-01 12:15:09,885 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,SelfDestructingSolverStorable2 [2023-09-01 12:15:09,886 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:15:09,886 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:15:09,886 INFO L85 PathProgramCache]: Analyzing trace with hash 141857420, now seen corresponding path program 2 times [2023-09-01 12:15:09,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:15:09,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747212104] [2023-09-01 12:15:09,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:15:09,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:15:09,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:15:10,232 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2023-09-01 12:15:10,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:15:10,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747212104] [2023-09-01 12:15:10,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747212104] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:15:10,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460336480] [2023-09-01 12:15:10,234 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 12:15:10,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:15:10,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:15:10,235 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) [2023-09-01 12:15:10,238 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-09-01 12:15:10,808 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-09-01 12:15:10,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:15:10,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 7 conjunts are in the unsatisfiable core [2023-09-01 12:15:10,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:15:16,998 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:15:17,000 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 8 new quantified variables, introduced 28 case distinctions, treesize of input 1365 treesize of output 1191 [2023-09-01 12:15:52,370 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2023-09-01 12:15:52,371 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 12:15:52,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [460336480] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 12:15:52,371 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 12:15:52,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 9 [2023-09-01 12:15:52,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736414599] [2023-09-01 12:15:52,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:15:52,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 12:15:52,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:15:52,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 12:15:52,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2023-09-01 12:15:52,550 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 375 out of 983 [2023-09-01 12:15:52,552 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 71 transitions, 390 flow. Second operand has 4 states, 4 states have (on average 381.75) internal successors, (1527), 4 states have internal predecessors, (1527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:15:52,552 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:15:52,552 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 375 of 983 [2023-09-01 12:15:52,552 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:15:53,338 INFO L130 PetriNetUnfolder]: 220/356 cut-off events. [2023-09-01 12:15:53,338 INFO L131 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2023-09-01 12:15:53,339 INFO L83 FinitePrefix]: Finished finitePrefix Result has 850 conditions, 356 events. 220/356 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 889 event pairs, 29 based on Foata normal form. 1/220 useless extension candidates. Maximal degree in co-relation 678. Up to 211 conditions per place. [2023-09-01 12:15:53,340 INFO L137 encePairwiseOnDemand]: 968/983 looper letters, 85 selfloop transitions, 13 changer transitions 6/104 dead transitions. [2023-09-01 12:15:53,340 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 104 transitions, 670 flow [2023-09-01 12:15:53,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 12:15:53,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 12:15:53,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1950 transitions. [2023-09-01 12:15:53,345 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3967446592065107 [2023-09-01 12:15:53,345 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1950 transitions. [2023-09-01 12:15:53,345 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1950 transitions. [2023-09-01 12:15:53,346 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:15:53,346 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1950 transitions. [2023-09-01 12:15:53,351 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 390.0) internal successors, (1950), 5 states have internal predecessors, (1950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:15:53,357 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 983.0) internal successors, (5898), 6 states have internal predecessors, (5898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:15:53,360 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 983.0) internal successors, (5898), 6 states have internal predecessors, (5898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:15:53,360 INFO L175 Difference]: Start difference. First operand has 40 places, 71 transitions, 390 flow. Second operand 5 states and 1950 transitions. [2023-09-01 12:15:53,360 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 104 transitions, 670 flow [2023-09-01 12:15:53,363 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 104 transitions, 588 flow, removed 29 selfloop flow, removed 3 redundant places. [2023-09-01 12:15:53,365 INFO L231 Difference]: Finished difference. Result has 44 places, 82 transitions, 398 flow [2023-09-01 12:15:53,365 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=983, PETRI_DIFFERENCE_MINUEND_FLOW=308, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=398, PETRI_PLACES=44, PETRI_TRANSITIONS=82} [2023-09-01 12:15:53,366 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 14 predicate places. [2023-09-01 12:15:53,366 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 82 transitions, 398 flow [2023-09-01 12:15:53,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 381.75) internal successors, (1527), 4 states have internal predecessors, (1527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:15:53,367 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:15:53,367 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:15:53,377 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-09-01 12:15:53,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:15:53,576 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:15:53,576 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:15:53,576 INFO L85 PathProgramCache]: Analyzing trace with hash -1414425790, now seen corresponding path program 3 times [2023-09-01 12:15:53,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:15:53,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663678853] [2023-09-01 12:15:53,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:15:53,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:15:53,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:15:54,037 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2023-09-01 12:15:54,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:15:54,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663678853] [2023-09-01 12:15:54,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663678853] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:15:54,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525127005] [2023-09-01 12:15:54,040 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 12:15:54,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:15:54,041 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:15:54,045 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) [2023-09-01 12:15:54,049 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-09-01 12:15:54,618 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-09-01 12:15:54,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:15:54,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 7 conjunts are in the unsatisfiable core [2023-09-01 12:15:54,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:15:58,411 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:15:58,412 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 8 new quantified variables, introduced 28 case distinctions, treesize of input 1350 treesize of output 1176 [2023-09-01 12:17:57,183 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2023-09-01 12:17:57,183 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 12:17:57,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [525127005] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 12:17:57,183 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 12:17:57,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 9 [2023-09-01 12:17:57,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123131473] [2023-09-01 12:17:57,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:17:57,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 12:17:57,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:17:57,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 12:17:57,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2023-09-01 12:17:57,269 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 375 out of 983 [2023-09-01 12:17:57,271 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 82 transitions, 398 flow. Second operand has 4 states, 4 states have (on average 381.75) internal successors, (1527), 4 states have internal predecessors, (1527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:17:57,271 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:17:57,271 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 375 of 983 [2023-09-01 12:17:57,271 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:17:57,964 INFO L130 PetriNetUnfolder]: 222/370 cut-off events. [2023-09-01 12:17:57,965 INFO L131 PetriNetUnfolder]: For 82/82 co-relation queries the response was YES. [2023-09-01 12:17:57,965 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1148 conditions, 370 events. 222/370 cut-off events. For 82/82 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 954 event pairs, 31 based on Foata normal form. 3/259 useless extension candidates. Maximal degree in co-relation 1128. Up to 242 conditions per place. [2023-09-01 12:17:57,967 INFO L137 encePairwiseOnDemand]: 969/983 looper letters, 86 selfloop transitions, 12 changer transitions 5/103 dead transitions. [2023-09-01 12:17:57,967 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 103 transitions, 670 flow [2023-09-01 12:17:57,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 12:17:57,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 12:17:57,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1948 transitions. [2023-09-01 12:17:57,972 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3963377416073245 [2023-09-01 12:17:57,972 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1948 transitions. [2023-09-01 12:17:57,972 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1948 transitions. [2023-09-01 12:17:57,973 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:17:57,973 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1948 transitions. [2023-09-01 12:17:57,976 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 389.6) internal successors, (1948), 5 states have internal predecessors, (1948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:17:57,981 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 983.0) internal successors, (5898), 6 states have internal predecessors, (5898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:17:57,985 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 983.0) internal successors, (5898), 6 states have internal predecessors, (5898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:17:57,985 INFO L175 Difference]: Start difference. First operand has 44 places, 82 transitions, 398 flow. Second operand 5 states and 1948 transitions. [2023-09-01 12:17:57,985 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 103 transitions, 670 flow [2023-09-01 12:17:57,987 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 103 transitions, 666 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-09-01 12:17:57,989 INFO L231 Difference]: Finished difference. Result has 48 places, 82 transitions, 430 flow [2023-09-01 12:17:57,989 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=983, PETRI_DIFFERENCE_MINUEND_FLOW=396, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=430, PETRI_PLACES=48, PETRI_TRANSITIONS=82} [2023-09-01 12:17:57,990 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 18 predicate places. [2023-09-01 12:17:57,990 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 82 transitions, 430 flow [2023-09-01 12:17:57,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 381.75) internal successors, (1527), 4 states have internal predecessors, (1527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:17:57,991 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:17:57,991 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:17:57,998 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-09-01 12:17:58,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:17:58,193 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:17:58,193 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:17:58,193 INFO L85 PathProgramCache]: Analyzing trace with hash 1787475852, now seen corresponding path program 4 times [2023-09-01 12:17:58,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:17:58,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38056458] [2023-09-01 12:17:58,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:17:58,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:17:58,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:17:58,497 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2023-09-01 12:17:58,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:17:58,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38056458] [2023-09-01 12:17:58,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38056458] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:17:58,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842300777] [2023-09-01 12:17:58,498 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 12:17:58,498 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:17:58,498 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:17:58,501 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) [2023-09-01 12:17:58,515 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-09-01 12:17:59,092 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 12:17:59,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:17:59,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 652 conjuncts, 8 conjunts are in the unsatisfiable core [2023-09-01 12:17:59,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:17:59,141 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2023-09-01 12:17:59,141 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:17:59,170 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2023-09-01 12:17:59,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1842300777] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:17:59,171 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:17:59,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2023-09-01 12:17:59,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253437327] [2023-09-01 12:17:59,171 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:17:59,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 12:17:59,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:17:59,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 12:17:59,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=76, Unknown=0, NotChecked=0, Total=132 [2023-09-01 12:17:59,629 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 351 out of 983 [2023-09-01 12:17:59,632 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 82 transitions, 430 flow. Second operand has 12 states, 12 states have (on average 354.0) internal successors, (4248), 12 states have internal predecessors, (4248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:17:59,632 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:17:59,632 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 351 of 983 [2023-09-01 12:17:59,632 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:18:00,206 INFO L130 PetriNetUnfolder]: 221/368 cut-off events. [2023-09-01 12:18:00,207 INFO L131 PetriNetUnfolder]: For 246/246 co-relation queries the response was YES. [2023-09-01 12:18:00,207 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1265 conditions, 368 events. 221/368 cut-off events. For 246/246 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 912 event pairs, 69 based on Foata normal form. 1/255 useless extension candidates. Maximal degree in co-relation 1243. Up to 333 conditions per place. [2023-09-01 12:18:00,209 INFO L137 encePairwiseOnDemand]: 966/983 looper letters, 42 selfloop transitions, 44 changer transitions 0/86 dead transitions. [2023-09-01 12:18:00,209 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 86 transitions, 626 flow [2023-09-01 12:18:00,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-09-01 12:18:00,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-09-01 12:18:00,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 3940 transitions. [2023-09-01 12:18:00,217 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3643762138167021 [2023-09-01 12:18:00,217 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 3940 transitions. [2023-09-01 12:18:00,218 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 3940 transitions. [2023-09-01 12:18:00,219 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:18:00,219 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 3940 transitions. [2023-09-01 12:18:00,226 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 358.1818181818182) internal successors, (3940), 11 states have internal predecessors, (3940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:18:00,237 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 983.0) internal successors, (11796), 12 states have internal predecessors, (11796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:18:00,239 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 983.0) internal successors, (11796), 12 states have internal predecessors, (11796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:18:00,239 INFO L175 Difference]: Start difference. First operand has 48 places, 82 transitions, 430 flow. Second operand 11 states and 3940 transitions. [2023-09-01 12:18:00,239 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 86 transitions, 626 flow [2023-09-01 12:18:00,241 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 86 transitions, 613 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-09-01 12:18:00,243 INFO L231 Difference]: Finished difference. Result has 56 places, 86 transitions, 547 flow [2023-09-01 12:18:00,243 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=983, PETRI_DIFFERENCE_MINUEND_FLOW=417, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=547, PETRI_PLACES=56, PETRI_TRANSITIONS=86} [2023-09-01 12:18:00,243 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 26 predicate places. [2023-09-01 12:18:00,244 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 86 transitions, 547 flow [2023-09-01 12:18:00,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 354.0) internal successors, (4248), 12 states have internal predecessors, (4248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:18:00,245 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:18:00,245 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:18:00,259 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-09-01 12:18:00,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:18:00,455 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:18:00,455 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:18:00,455 INFO L85 PathProgramCache]: Analyzing trace with hash 1712025184, now seen corresponding path program 5 times [2023-09-01 12:18:00,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:18:00,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490401704] [2023-09-01 12:18:00,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:18:00,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:18:00,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:18:00,842 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2023-09-01 12:18:00,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:18:00,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490401704] [2023-09-01 12:18:00,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490401704] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:18:00,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948651869] [2023-09-01 12:18:00,844 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 12:18:00,844 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:18:00,844 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:18:00,845 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) [2023-09-01 12:18:00,855 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-09-01 12:21:05,769 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-09-01 12:21:05,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:21:05,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 688 conjuncts, 9 conjunts are in the unsatisfiable core [2023-09-01 12:21:05,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:21:05,865 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2023-09-01 12:21:05,866 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:21:05,921 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2023-09-01 12:21:05,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [948651869] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:21:05,921 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:21:05,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2023-09-01 12:21:05,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836584889] [2023-09-01 12:21:05,922 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:21:05,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-09-01 12:21:05,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:21:05,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-09-01 12:21:05,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=200, Unknown=0, NotChecked=0, Total=380 [2023-09-01 12:21:06,668 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 351 out of 983 [2023-09-01 12:21:06,671 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 86 transitions, 547 flow. Second operand has 20 states, 20 states have (on average 353.25) internal successors, (7065), 20 states have internal predecessors, (7065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:21:06,671 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:21:06,671 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 351 of 983 [2023-09-01 12:21:06,671 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:21:07,220 INFO L130 PetriNetUnfolder]: 221/382 cut-off events. [2023-09-01 12:21:07,220 INFO L131 PetriNetUnfolder]: For 193/193 co-relation queries the response was YES. [2023-09-01 12:21:07,221 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1385 conditions, 382 events. 221/382 cut-off events. For 193/193 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 901 event pairs, 69 based on Foata normal form. 14/288 useless extension candidates. Maximal degree in co-relation 1099. Up to 333 conditions per place. [2023-09-01 12:21:07,222 INFO L137 encePairwiseOnDemand]: 966/983 looper letters, 42 selfloop transitions, 58 changer transitions 0/100 dead transitions. [2023-09-01 12:21:07,223 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 100 transitions, 859 flow [2023-09-01 12:21:07,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-09-01 12:21:07,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-09-01 12:21:07,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 5017 transitions. [2023-09-01 12:21:07,230 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3645545705566051 [2023-09-01 12:21:07,230 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 5017 transitions. [2023-09-01 12:21:07,230 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 5017 transitions. [2023-09-01 12:21:07,232 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:21:07,232 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 5017 transitions. [2023-09-01 12:21:07,239 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 358.35714285714283) internal successors, (5017), 14 states have internal predecessors, (5017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:21:07,254 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 983.0) internal successors, (14745), 15 states have internal predecessors, (14745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:21:07,257 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 983.0) internal successors, (14745), 15 states have internal predecessors, (14745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:21:07,257 INFO L175 Difference]: Start difference. First operand has 56 places, 86 transitions, 547 flow. Second operand 14 states and 5017 transitions. [2023-09-01 12:21:07,257 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 100 transitions, 859 flow [2023-09-01 12:21:07,260 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 100 transitions, 779 flow, removed 8 selfloop flow, removed 6 redundant places. [2023-09-01 12:21:07,262 INFO L231 Difference]: Finished difference. Result has 70 places, 100 transitions, 793 flow [2023-09-01 12:21:07,262 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=983, PETRI_DIFFERENCE_MINUEND_FLOW=467, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=793, PETRI_PLACES=70, PETRI_TRANSITIONS=100} [2023-09-01 12:21:07,263 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 40 predicate places. [2023-09-01 12:21:07,263 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 100 transitions, 793 flow [2023-09-01 12:21:07,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 353.25) internal successors, (7065), 20 states have internal predecessors, (7065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:21:07,265 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:21:07,265 INFO L208 CegarLoopForPetriNet]: trace histogram [12, 12, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:21:07,298 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-09-01 12:21:07,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:21:07,481 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:21:07,481 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:21:07,482 INFO L85 PathProgramCache]: Analyzing trace with hash -595377332, now seen corresponding path program 6 times [2023-09-01 12:21:07,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:21:07,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987276927] [2023-09-01 12:21:07,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:21:07,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:21:07,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:21:08,079 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2023-09-01 12:21:08,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:21:08,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987276927] [2023-09-01 12:21:08,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987276927] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:21:08,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051185348] [2023-09-01 12:21:08,080 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 12:21:08,080 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:21:08,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:21:08,081 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) [2023-09-01 12:21:08,084 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-09-01 12:21:08,677 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2023-09-01 12:21:08,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 12:21:08,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 21 conjunts are in the unsatisfiable core [2023-09-01 12:21:08,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:21:11,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 12:21:11,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 12:21:11,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 12:21:11,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 12:21:11,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 12:21:11,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 12:21:11,826 INFO L321 Elim1Store]: treesize reduction 120, result has 0.8 percent of original size [2023-09-01 12:21:11,826 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 446 treesize of output 395 [2023-09-01 12:21:14,299 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:21:14,300 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 8 new quantified variables, introduced 28 case distinctions, treesize of input 1365 treesize of output 1191 [2023-09-01 12:21:42,135 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2023-09-01 12:21:42,136 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 12:21:42,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2051185348] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 12:21:42,136 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 12:21:42,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [15] total 25 [2023-09-01 12:21:42,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281847430] [2023-09-01 12:21:42,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:21:42,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 12:21:42,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:21:42,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 12:21:42,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=463, Unknown=0, NotChecked=0, Total=600 [2023-09-01 12:21:42,846 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 356 out of 983 [2023-09-01 12:21:42,848 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 100 transitions, 793 flow. Second operand has 12 states, 12 states have (on average 358.25) internal successors, (4299), 12 states have internal predecessors, (4299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:21:42,848 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:21:42,848 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 356 of 983 [2023-09-01 12:21:42,848 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:21:44,069 INFO L130 PetriNetUnfolder]: 223/394 cut-off events. [2023-09-01 12:21:44,069 INFO L131 PetriNetUnfolder]: For 238/238 co-relation queries the response was YES. [2023-09-01 12:21:44,070 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1497 conditions, 394 events. 223/394 cut-off events. For 238/238 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1037 event pairs, 26 based on Foata normal form. 5/291 useless extension candidates. Maximal degree in co-relation 1158. Up to 225 conditions per place. [2023-09-01 12:21:44,071 INFO L137 encePairwiseOnDemand]: 969/983 looper letters, 103 selfloop transitions, 12 changer transitions 7/122 dead transitions. [2023-09-01 12:21:44,072 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 122 transitions, 1112 flow [2023-09-01 12:21:44,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 12:21:44,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 12:21:44,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 2211 transitions. [2023-09-01 12:21:44,075 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3748728382502543 [2023-09-01 12:21:44,075 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 2211 transitions. [2023-09-01 12:21:44,076 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 2211 transitions. [2023-09-01 12:21:44,076 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:21:44,076 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 2211 transitions. [2023-09-01 12:21:44,079 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 368.5) internal successors, (2211), 6 states have internal predecessors, (2211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:21:44,083 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 983.0) internal successors, (6881), 7 states have internal predecessors, (6881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:21:44,084 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 983.0) internal successors, (6881), 7 states have internal predecessors, (6881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:21:44,084 INFO L175 Difference]: Start difference. First operand has 70 places, 100 transitions, 793 flow. Second operand 6 states and 2211 transitions. [2023-09-01 12:21:44,084 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 122 transitions, 1112 flow [2023-09-01 12:21:44,088 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 122 transitions, 1040 flow, removed 28 selfloop flow, removed 1 redundant places. [2023-09-01 12:21:44,090 INFO L231 Difference]: Finished difference. Result has 76 places, 99 transitions, 750 flow [2023-09-01 12:21:44,091 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=983, PETRI_DIFFERENCE_MINUEND_FLOW=721, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=750, PETRI_PLACES=76, PETRI_TRANSITIONS=99} [2023-09-01 12:21:44,091 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 46 predicate places. [2023-09-01 12:21:44,091 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 99 transitions, 750 flow [2023-09-01 12:21:44,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 358.25) internal successors, (4299), 12 states have internal predecessors, (4299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:21:44,092 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:21:44,092 INFO L208 CegarLoopForPetriNet]: trace histogram [12, 12, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:21:44,105 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-09-01 12:21:44,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:21:44,302 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:21:44,302 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:21:44,302 INFO L85 PathProgramCache]: Analyzing trace with hash 1455469097, now seen corresponding path program 1 times [2023-09-01 12:21:44,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:21:44,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719289389] [2023-09-01 12:21:44,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:21:44,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:21:44,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:21:44,815 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2023-09-01 12:21:44,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:21:44,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719289389] [2023-09-01 12:21:44,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719289389] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 12:21:44,816 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 12:21:44,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 12:21:44,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460576888] [2023-09-01 12:21:44,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:21:44,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 12:21:44,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:21:44,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 12:21:44,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 12:21:44,850 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 385 out of 983 [2023-09-01 12:21:44,852 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 99 transitions, 750 flow. Second operand has 3 states, 3 states have (on average 394.3333333333333) internal successors, (1183), 3 states have internal predecessors, (1183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:21:44,852 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:21:44,852 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 385 of 983 [2023-09-01 12:21:44,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:21:45,416 INFO L130 PetriNetUnfolder]: 249/438 cut-off events. [2023-09-01 12:21:45,417 INFO L131 PetriNetUnfolder]: For 535/535 co-relation queries the response was YES. [2023-09-01 12:21:45,418 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1735 conditions, 438 events. 249/438 cut-off events. For 535/535 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 1190 event pairs, 46 based on Foata normal form. 14/330 useless extension candidates. Maximal degree in co-relation 1699. Up to 275 conditions per place. [2023-09-01 12:21:45,420 INFO L137 encePairwiseOnDemand]: 976/983 looper letters, 117 selfloop transitions, 3 changer transitions 0/120 dead transitions. [2023-09-01 12:21:45,420 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 120 transitions, 1093 flow [2023-09-01 12:21:45,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 12:21:45,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 12:21:45,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1213 transitions. [2023-09-01 12:21:45,423 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41132587317734826 [2023-09-01 12:21:45,423 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1213 transitions. [2023-09-01 12:21:45,423 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1213 transitions. [2023-09-01 12:21:45,423 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:21:45,424 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1213 transitions. [2023-09-01 12:21:45,425 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 404.3333333333333) internal successors, (1213), 3 states have internal predecessors, (1213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:21:45,427 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 983.0) internal successors, (3932), 4 states have internal predecessors, (3932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:21:45,427 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 983.0) internal successors, (3932), 4 states have internal predecessors, (3932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:21:45,427 INFO L175 Difference]: Start difference. First operand has 76 places, 99 transitions, 750 flow. Second operand 3 states and 1213 transitions. [2023-09-01 12:21:45,427 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 120 transitions, 1093 flow [2023-09-01 12:21:45,431 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 120 transitions, 1044 flow, removed 6 selfloop flow, removed 5 redundant places. [2023-09-01 12:21:45,433 INFO L231 Difference]: Finished difference. Result has 74 places, 102 transitions, 759 flow [2023-09-01 12:21:45,433 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=983, PETRI_DIFFERENCE_MINUEND_FLOW=717, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=759, PETRI_PLACES=74, PETRI_TRANSITIONS=102} [2023-09-01 12:21:45,434 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 44 predicate places. [2023-09-01 12:21:45,434 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 102 transitions, 759 flow [2023-09-01 12:21:45,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 394.3333333333333) internal successors, (1183), 3 states have internal predecessors, (1183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:21:45,434 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:21:45,434 INFO L208 CegarLoopForPetriNet]: trace histogram [12, 12, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:21:45,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-09-01 12:21:45,435 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:21:45,435 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:21:45,435 INFO L85 PathProgramCache]: Analyzing trace with hash 1325857365, now seen corresponding path program 1 times [2023-09-01 12:21:45,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:21:45,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332878708] [2023-09-01 12:21:45,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:21:45,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:21:45,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:21:46,004 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2023-09-01 12:21:46,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:21:46,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332878708] [2023-09-01 12:21:46,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332878708] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:21:46,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86212935] [2023-09-01 12:21:46,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:21:46,005 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:21:46,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:21:46,009 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) [2023-09-01 12:21:46,013 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-09-01 12:21:46,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:21:46,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 847 conjuncts, 16 conjunts are in the unsatisfiable core [2023-09-01 12:21:46,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:21:46,942 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2023-09-01 12:21:46,942 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:21:47,039 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2023-09-01 12:21:47,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [86212935] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 12:21:47,039 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 12:21:47,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 29 [2023-09-01 12:21:47,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961247871] [2023-09-01 12:21:47,040 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 12:21:47,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-09-01 12:21:47,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:21:47,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-09-01 12:21:47,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=328, Invalid=484, Unknown=0, NotChecked=0, Total=812 [2023-09-01 12:21:48,056 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 351 out of 983 [2023-09-01 12:21:48,060 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 102 transitions, 759 flow. Second operand has 29 states, 29 states have (on average 352.8965517241379) internal successors, (10234), 29 states have internal predecessors, (10234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:21:48,060 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:21:48,060 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 351 of 983 [2023-09-01 12:21:48,061 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:21:48,640 INFO L130 PetriNetUnfolder]: 249/440 cut-off events. [2023-09-01 12:21:48,640 INFO L131 PetriNetUnfolder]: For 590/590 co-relation queries the response was YES. [2023-09-01 12:21:48,641 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1740 conditions, 440 events. 249/440 cut-off events. For 590/590 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 1150 event pairs, 81 based on Foata normal form. 2/344 useless extension candidates. Maximal degree in co-relation 1370. Up to 389 conditions per place. [2023-09-01 12:21:48,643 INFO L137 encePairwiseOnDemand]: 966/983 looper letters, 44 selfloop transitions, 60 changer transitions 0/104 dead transitions. [2023-09-01 12:21:48,643 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 104 transitions, 987 flow [2023-09-01 12:21:48,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-09-01 12:21:48,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-09-01 12:21:48,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 7113 transitions. [2023-09-01 12:21:48,652 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36180061037639877 [2023-09-01 12:21:48,652 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 7113 transitions. [2023-09-01 12:21:48,652 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 7113 transitions. [2023-09-01 12:21:48,655 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:21:48,655 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 7113 transitions. [2023-09-01 12:21:48,662 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 355.65) internal successors, (7113), 20 states have internal predecessors, (7113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:21:48,673 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 983.0) internal successors, (20643), 21 states have internal predecessors, (20643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:21:48,674 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 983.0) internal successors, (20643), 21 states have internal predecessors, (20643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:21:48,674 INFO L175 Difference]: Start difference. First operand has 74 places, 102 transitions, 759 flow. Second operand 20 states and 7113 transitions. [2023-09-01 12:21:48,674 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 104 transitions, 987 flow [2023-09-01 12:21:48,677 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 104 transitions, 975 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-09-01 12:21:48,679 INFO L231 Difference]: Finished difference. Result has 92 places, 104 transitions, 897 flow [2023-09-01 12:21:48,679 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=983, PETRI_DIFFERENCE_MINUEND_FLOW=747, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=897, PETRI_PLACES=92, PETRI_TRANSITIONS=104} [2023-09-01 12:21:48,680 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 62 predicate places. [2023-09-01 12:21:48,680 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 104 transitions, 897 flow [2023-09-01 12:21:48,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 352.8965517241379) internal successors, (10234), 29 states have internal predecessors, (10234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:21:48,682 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:21:48,682 INFO L208 CegarLoopForPetriNet]: trace histogram [13, 13, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:21:48,691 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-09-01 12:21:48,885 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,SelfDestructingSolverStorable9 [2023-09-01 12:21:48,885 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:21:48,885 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:21:48,886 INFO L85 PathProgramCache]: Analyzing trace with hash 1454465938, now seen corresponding path program 1 times [2023-09-01 12:21:48,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:21:48,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903772449] [2023-09-01 12:21:48,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:21:48,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:21:48,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:21:49,209 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2023-09-01 12:21:49,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:21:49,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903772449] [2023-09-01 12:21:49,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903772449] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 12:21:49,210 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 12:21:49,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 12:21:49,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680685161] [2023-09-01 12:21:49,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:21:49,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 12:21:49,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:21:49,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 12:21:49,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 12:21:49,216 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 399 out of 983 [2023-09-01 12:21:49,217 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 104 transitions, 897 flow. Second operand has 3 states, 3 states have (on average 408.3333333333333) internal successors, (1225), 3 states have internal predecessors, (1225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:21:49,217 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:21:49,217 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 399 of 983 [2023-09-01 12:21:49,218 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:21:49,853 INFO L130 PetriNetUnfolder]: 276/508 cut-off events. [2023-09-01 12:21:49,854 INFO L131 PetriNetUnfolder]: For 441/441 co-relation queries the response was YES. [2023-09-01 12:21:49,855 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1941 conditions, 508 events. 276/508 cut-off events. For 441/441 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 1574 event pairs, 88 based on Foata normal form. 0/378 useless extension candidates. Maximal degree in co-relation 1513. Up to 386 conditions per place. [2023-09-01 12:21:49,857 INFO L137 encePairwiseOnDemand]: 980/983 looper letters, 115 selfloop transitions, 3 changer transitions 0/118 dead transitions. [2023-09-01 12:21:49,857 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 118 transitions, 1191 flow [2023-09-01 12:21:49,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 12:21:49,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 12:21:49,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1252 transitions. [2023-09-01 12:21:49,860 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4245506951508986 [2023-09-01 12:21:49,860 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1252 transitions. [2023-09-01 12:21:49,860 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1252 transitions. [2023-09-01 12:21:49,861 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:21:49,861 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1252 transitions. [2023-09-01 12:21:49,863 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 417.3333333333333) internal successors, (1252), 3 states have internal predecessors, (1252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:21:49,865 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 983.0) internal successors, (3932), 4 states have internal predecessors, (3932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:21:49,866 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 983.0) internal successors, (3932), 4 states have internal predecessors, (3932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:21:49,866 INFO L175 Difference]: Start difference. First operand has 92 places, 104 transitions, 897 flow. Second operand 3 states and 1252 transitions. [2023-09-01 12:21:49,866 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 118 transitions, 1191 flow [2023-09-01 12:21:49,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 118 transitions, 1039 flow, removed 22 selfloop flow, removed 13 redundant places. [2023-09-01 12:21:49,872 INFO L231 Difference]: Finished difference. Result has 82 places, 104 transitions, 756 flow [2023-09-01 12:21:49,873 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=983, PETRI_DIFFERENCE_MINUEND_FLOW=739, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=756, PETRI_PLACES=82, PETRI_TRANSITIONS=104} [2023-09-01 12:21:49,873 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 52 predicate places. [2023-09-01 12:21:49,873 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 104 transitions, 756 flow [2023-09-01 12:21:49,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 408.3333333333333) internal successors, (1225), 3 states have internal predecessors, (1225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:21:49,874 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:21:49,874 INFO L208 CegarLoopForPetriNet]: trace histogram [13, 13, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:21:49,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-09-01 12:21:49,874 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:21:49,875 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:21:49,875 INFO L85 PathProgramCache]: Analyzing trace with hash 779212570, now seen corresponding path program 1 times [2023-09-01 12:21:49,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:21:49,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438236623] [2023-09-01 12:21:49,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:21:49,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:21:49,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:21:50,186 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2023-09-01 12:21:50,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:21:50,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438236623] [2023-09-01 12:21:50,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438236623] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 12:21:50,186 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 12:21:50,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 12:21:50,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393257080] [2023-09-01 12:21:50,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:21:50,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 12:21:50,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:21:50,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 12:21:50,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 12:21:50,191 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 399 out of 983 [2023-09-01 12:21:50,192 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 104 transitions, 756 flow. Second operand has 3 states, 3 states have (on average 408.3333333333333) internal successors, (1225), 3 states have internal predecessors, (1225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:21:50,192 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:21:50,192 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 399 of 983 [2023-09-01 12:21:50,192 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:21:50,815 INFO L130 PetriNetUnfolder]: 281/525 cut-off events. [2023-09-01 12:21:50,815 INFO L131 PetriNetUnfolder]: For 513/513 co-relation queries the response was YES. [2023-09-01 12:21:50,816 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1951 conditions, 525 events. 281/525 cut-off events. For 513/513 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 1693 event pairs, 96 based on Foata normal form. 0/402 useless extension candidates. Maximal degree in co-relation 1626. Up to 358 conditions per place. [2023-09-01 12:21:50,818 INFO L137 encePairwiseOnDemand]: 980/983 looper letters, 116 selfloop transitions, 3 changer transitions 0/119 dead transitions. [2023-09-01 12:21:50,819 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 119 transitions, 1054 flow [2023-09-01 12:21:50,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 12:21:50,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 12:21:50,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1252 transitions. [2023-09-01 12:21:50,821 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4245506951508986 [2023-09-01 12:21:50,821 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1252 transitions. [2023-09-01 12:21:50,821 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1252 transitions. [2023-09-01 12:21:50,822 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:21:50,822 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1252 transitions. [2023-09-01 12:21:50,823 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 417.3333333333333) internal successors, (1252), 3 states have internal predecessors, (1252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:21:50,825 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 983.0) internal successors, (3932), 4 states have internal predecessors, (3932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:21:50,825 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 983.0) internal successors, (3932), 4 states have internal predecessors, (3932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:21:50,826 INFO L175 Difference]: Start difference. First operand has 82 places, 104 transitions, 756 flow. Second operand 3 states and 1252 transitions. [2023-09-01 12:21:50,826 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 119 transitions, 1054 flow [2023-09-01 12:21:50,830 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 119 transitions, 1051 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 12:21:50,832 INFO L231 Difference]: Finished difference. Result has 84 places, 104 transitions, 764 flow [2023-09-01 12:21:50,832 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=983, PETRI_DIFFERENCE_MINUEND_FLOW=747, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=764, PETRI_PLACES=84, PETRI_TRANSITIONS=104} [2023-09-01 12:21:50,833 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 54 predicate places. [2023-09-01 12:21:50,833 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 104 transitions, 764 flow [2023-09-01 12:21:50,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 408.3333333333333) internal successors, (1225), 3 states have internal predecessors, (1225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:21:50,833 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:21:50,833 INFO L208 CegarLoopForPetriNet]: trace histogram [13, 13, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:21:50,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-09-01 12:21:50,834 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:21:50,834 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:21:50,834 INFO L85 PathProgramCache]: Analyzing trace with hash -750295871, now seen corresponding path program 2 times [2023-09-01 12:21:50,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:21:50,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501953915] [2023-09-01 12:21:50,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:21:50,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:21:50,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:21:51,182 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2023-09-01 12:21:51,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:21:51,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501953915] [2023-09-01 12:21:51,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501953915] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 12:21:51,183 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 12:21:51,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 12:21:51,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613773919] [2023-09-01 12:21:51,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:21:51,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 12:21:51,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:21:51,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 12:21:51,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 12:21:51,188 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 399 out of 983 [2023-09-01 12:21:51,189 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 104 transitions, 764 flow. Second operand has 3 states, 3 states have (on average 408.3333333333333) internal successors, (1225), 3 states have internal predecessors, (1225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:21:51,189 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:21:51,189 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 399 of 983 [2023-09-01 12:21:51,189 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:21:51,953 INFO L130 PetriNetUnfolder]: 303/579 cut-off events. [2023-09-01 12:21:51,953 INFO L131 PetriNetUnfolder]: For 625/625 co-relation queries the response was YES. [2023-09-01 12:21:51,955 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2167 conditions, 579 events. 303/579 cut-off events. For 625/625 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2020 event pairs, 100 based on Foata normal form. 0/456 useless extension candidates. Maximal degree in co-relation 1840. Up to 395 conditions per place. [2023-09-01 12:21:51,958 INFO L137 encePairwiseOnDemand]: 980/983 looper letters, 114 selfloop transitions, 3 changer transitions 0/117 dead transitions. [2023-09-01 12:21:51,958 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 117 transitions, 1057 flow [2023-09-01 12:21:51,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 12:21:51,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 12:21:51,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1250 transitions. [2023-09-01 12:21:51,961 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.423872499152255 [2023-09-01 12:21:51,961 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1250 transitions. [2023-09-01 12:21:51,961 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1250 transitions. [2023-09-01 12:21:51,962 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:21:51,962 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1250 transitions. [2023-09-01 12:21:51,964 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 416.6666666666667) internal successors, (1250), 3 states have internal predecessors, (1250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:21:51,966 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 983.0) internal successors, (3932), 4 states have internal predecessors, (3932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:21:51,967 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 983.0) internal successors, (3932), 4 states have internal predecessors, (3932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:21:51,967 INFO L175 Difference]: Start difference. First operand has 84 places, 104 transitions, 764 flow. Second operand 3 states and 1250 transitions. [2023-09-01 12:21:51,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 117 transitions, 1057 flow [2023-09-01 12:21:51,971 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 117 transitions, 1053 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 12:21:51,973 INFO L231 Difference]: Finished difference. Result has 86 places, 104 transitions, 772 flow [2023-09-01 12:21:51,973 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=983, PETRI_DIFFERENCE_MINUEND_FLOW=755, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=772, PETRI_PLACES=86, PETRI_TRANSITIONS=104} [2023-09-01 12:21:51,973 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 56 predicate places. [2023-09-01 12:21:51,974 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 104 transitions, 772 flow [2023-09-01 12:21:51,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 408.3333333333333) internal successors, (1225), 3 states have internal predecessors, (1225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:21:51,974 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:21:51,974 INFO L208 CegarLoopForPetriNet]: trace histogram [13, 13, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:21:51,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-09-01 12:21:51,975 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:21:51,975 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:21:51,975 INFO L85 PathProgramCache]: Analyzing trace with hash -52120250, now seen corresponding path program 1 times [2023-09-01 12:21:51,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:21:51,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518378579] [2023-09-01 12:21:51,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:21:51,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:21:52,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:21:56,030 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2023-09-01 12:21:56,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:21:56,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518378579] [2023-09-01 12:21:56,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518378579] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 12:21:56,030 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 12:21:56,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-09-01 12:21:56,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147436] [2023-09-01 12:21:56,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:21:56,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-09-01 12:21:56,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:21:56,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-09-01 12:21:56,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2023-09-01 12:21:56,531 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 358 out of 983 [2023-09-01 12:21:56,533 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 104 transitions, 772 flow. Second operand has 11 states, 11 states have (on average 360.6363636363636) internal successors, (3967), 11 states have internal predecessors, (3967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:21:56,533 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:21:56,533 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 358 of 983 [2023-09-01 12:21:56,533 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:21:57,289 INFO L130 PetriNetUnfolder]: 277/529 cut-off events. [2023-09-01 12:21:57,290 INFO L131 PetriNetUnfolder]: For 595/595 co-relation queries the response was YES. [2023-09-01 12:21:57,291 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2064 conditions, 529 events. 277/529 cut-off events. For 595/595 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 1737 event pairs, 76 based on Foata normal form. 14/426 useless extension candidates. Maximal degree in co-relation 1735. Up to 298 conditions per place. [2023-09-01 12:21:57,294 INFO L137 encePairwiseOnDemand]: 978/983 looper letters, 118 selfloop transitions, 3 changer transitions 1/122 dead transitions. [2023-09-01 12:21:57,294 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 122 transitions, 1097 flow [2023-09-01 12:21:57,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 12:21:57,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 12:21:57,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1488 transitions. [2023-09-01 12:21:57,297 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37843336724313326 [2023-09-01 12:21:57,297 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1488 transitions. [2023-09-01 12:21:57,298 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1488 transitions. [2023-09-01 12:21:57,299 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:21:57,299 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1488 transitions. [2023-09-01 12:21:57,300 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 372.0) internal successors, (1488), 4 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:21:57,303 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 983.0) internal successors, (4915), 5 states have internal predecessors, (4915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:21:57,304 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 983.0) internal successors, (4915), 5 states have internal predecessors, (4915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:21:57,304 INFO L175 Difference]: Start difference. First operand has 86 places, 104 transitions, 772 flow. Second operand 4 states and 1488 transitions. [2023-09-01 12:21:57,304 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 122 transitions, 1097 flow [2023-09-01 12:21:57,308 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 122 transitions, 1094 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 12:21:57,310 INFO L231 Difference]: Finished difference. Result has 90 places, 104 transitions, 780 flow [2023-09-01 12:21:57,310 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=983, PETRI_DIFFERENCE_MINUEND_FLOW=759, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=780, PETRI_PLACES=90, PETRI_TRANSITIONS=104} [2023-09-01 12:21:57,311 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 60 predicate places. [2023-09-01 12:21:57,311 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 104 transitions, 780 flow [2023-09-01 12:21:57,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 360.6363636363636) internal successors, (3967), 11 states have internal predecessors, (3967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:21:57,312 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:21:57,312 INFO L208 CegarLoopForPetriNet]: trace histogram [13, 13, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:21:57,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-09-01 12:21:57,313 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:21:57,313 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:21:57,313 INFO L85 PathProgramCache]: Analyzing trace with hash -1918064962, now seen corresponding path program 1 times [2023-09-01 12:21:57,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:21:57,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207760857] [2023-09-01 12:21:57,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:21:57,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:21:57,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:21:58,487 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2023-09-01 12:21:58,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:21:58,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207760857] [2023-09-01 12:21:58,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207760857] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 12:21:58,488 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 12:21:58,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-09-01 12:21:58,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866704245] [2023-09-01 12:21:58,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:21:58,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-09-01 12:21:58,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:21:58,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-09-01 12:21:58,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-09-01 12:21:58,768 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 366 out of 983 [2023-09-01 12:21:58,770 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 104 transitions, 780 flow. Second operand has 7 states, 7 states have (on average 370.14285714285717) internal successors, (2591), 7 states have internal predecessors, (2591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:21:58,770 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:21:58,770 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 366 of 983 [2023-09-01 12:21:58,770 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:21:59,250 INFO L130 PetriNetUnfolder]: 223/433 cut-off events. [2023-09-01 12:21:59,250 INFO L131 PetriNetUnfolder]: For 696/696 co-relation queries the response was YES. [2023-09-01 12:21:59,252 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1704 conditions, 433 events. 223/433 cut-off events. For 696/696 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1299 event pairs, 62 based on Foata normal form. 16/376 useless extension candidates. Maximal degree in co-relation 1372. Up to 246 conditions per place. [2023-09-01 12:21:59,254 INFO L137 encePairwiseOnDemand]: 978/983 looper letters, 114 selfloop transitions, 3 changer transitions 1/118 dead transitions. [2023-09-01 12:21:59,254 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 118 transitions, 1076 flow [2023-09-01 12:21:59,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 12:21:59,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 12:21:59,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1517 transitions. [2023-09-01 12:21:59,257 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3858087487283825 [2023-09-01 12:21:59,258 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1517 transitions. [2023-09-01 12:21:59,258 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1517 transitions. [2023-09-01 12:21:59,258 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:21:59,258 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1517 transitions. [2023-09-01 12:21:59,260 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 379.25) internal successors, (1517), 4 states have internal predecessors, (1517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:21:59,263 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 983.0) internal successors, (4915), 5 states have internal predecessors, (4915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:21:59,263 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 983.0) internal successors, (4915), 5 states have internal predecessors, (4915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:21:59,263 INFO L175 Difference]: Start difference. First operand has 90 places, 104 transitions, 780 flow. Second operand 4 states and 1517 transitions. [2023-09-01 12:21:59,263 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 118 transitions, 1076 flow [2023-09-01 12:21:59,267 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 118 transitions, 1057 flow, removed 5 selfloop flow, removed 3 redundant places. [2023-09-01 12:21:59,269 INFO L231 Difference]: Finished difference. Result has 90 places, 103 transitions, 760 flow [2023-09-01 12:21:59,270 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=983, PETRI_DIFFERENCE_MINUEND_FLOW=752, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=760, PETRI_PLACES=90, PETRI_TRANSITIONS=103} [2023-09-01 12:21:59,270 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 60 predicate places. [2023-09-01 12:21:59,270 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 103 transitions, 760 flow [2023-09-01 12:21:59,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 370.14285714285717) internal successors, (2591), 7 states have internal predecessors, (2591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:21:59,271 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:21:59,271 INFO L208 CegarLoopForPetriNet]: trace histogram [13, 13, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:21:59,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-09-01 12:21:59,272 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:21:59,272 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:21:59,272 INFO L85 PathProgramCache]: Analyzing trace with hash -2001024701, now seen corresponding path program 1 times [2023-09-01 12:21:59,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:21:59,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372149040] [2023-09-01 12:21:59,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:21:59,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:21:59,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:21:59,546 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2023-09-01 12:21:59,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:21:59,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372149040] [2023-09-01 12:21:59,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372149040] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 12:21:59,547 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 12:21:59,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 12:21:59,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457452206] [2023-09-01 12:21:59,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:21:59,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 12:21:59,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:21:59,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 12:21:59,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 12:21:59,554 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 399 out of 983 [2023-09-01 12:21:59,555 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 103 transitions, 760 flow. Second operand has 3 states, 3 states have (on average 409.0) internal successors, (1227), 3 states have internal predecessors, (1227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:21:59,555 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:21:59,555 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 399 of 983 [2023-09-01 12:21:59,555 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:21:59,962 INFO L130 PetriNetUnfolder]: 232/452 cut-off events. [2023-09-01 12:21:59,962 INFO L131 PetriNetUnfolder]: For 560/560 co-relation queries the response was YES. [2023-09-01 12:21:59,964 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1730 conditions, 452 events. 232/452 cut-off events. For 560/560 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1357 event pairs, 87 based on Foata normal form. 0/381 useless extension candidates. Maximal degree in co-relation 1397. Up to 344 conditions per place. [2023-09-01 12:21:59,966 INFO L137 encePairwiseOnDemand]: 980/983 looper letters, 112 selfloop transitions, 3 changer transitions 0/115 dead transitions. [2023-09-01 12:21:59,966 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 115 transitions, 1041 flow [2023-09-01 12:21:59,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 12:21:59,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 12:21:59,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1246 transitions. [2023-09-01 12:21:59,969 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4225161071549678 [2023-09-01 12:21:59,969 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1246 transitions. [2023-09-01 12:21:59,969 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1246 transitions. [2023-09-01 12:21:59,969 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:21:59,970 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1246 transitions. [2023-09-01 12:21:59,971 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 415.3333333333333) internal successors, (1246), 3 states have internal predecessors, (1246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:21:59,974 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 983.0) internal successors, (3932), 4 states have internal predecessors, (3932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:21:59,975 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 983.0) internal successors, (3932), 4 states have internal predecessors, (3932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:21:59,975 INFO L175 Difference]: Start difference. First operand has 90 places, 103 transitions, 760 flow. Second operand 3 states and 1246 transitions. [2023-09-01 12:21:59,975 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 115 transitions, 1041 flow [2023-09-01 12:21:59,979 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 115 transitions, 1032 flow, removed 3 selfloop flow, removed 3 redundant places. [2023-09-01 12:21:59,981 INFO L231 Difference]: Finished difference. Result has 89 places, 103 transitions, 763 flow [2023-09-01 12:21:59,981 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=983, PETRI_DIFFERENCE_MINUEND_FLOW=746, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=763, PETRI_PLACES=89, PETRI_TRANSITIONS=103} [2023-09-01 12:21:59,982 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 59 predicate places. [2023-09-01 12:21:59,982 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 103 transitions, 763 flow [2023-09-01 12:21:59,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 409.0) internal successors, (1227), 3 states have internal predecessors, (1227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:21:59,983 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:21:59,983 INFO L208 CegarLoopForPetriNet]: trace histogram [13, 13, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:21:59,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-09-01 12:21:59,985 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:21:59,985 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:21:59,986 INFO L85 PathProgramCache]: Analyzing trace with hash 1219073865, now seen corresponding path program 1 times [2023-09-01 12:21:59,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:21:59,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414749129] [2023-09-01 12:21:59,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:21:59,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:22:00,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:22:00,124 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 254 trivial. 0 not checked. [2023-09-01 12:22:00,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:22:00,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414749129] [2023-09-01 12:22:00,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414749129] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 12:22:00,124 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 12:22:00,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 12:22:00,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884477158] [2023-09-01 12:22:00,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 12:22:00,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 12:22:00,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 12:22:00,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 12:22:00,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 12:22:00,143 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 387 out of 983 [2023-09-01 12:22:00,144 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 103 transitions, 763 flow. Second operand has 3 states, 3 states have (on average 397.3333333333333) internal successors, (1192), 3 states have internal predecessors, (1192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:22:00,145 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 12:22:00,145 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 387 of 983 [2023-09-01 12:22:00,145 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 12:22:00,498 INFO L130 PetriNetUnfolder]: 207/412 cut-off events. [2023-09-01 12:22:00,499 INFO L131 PetriNetUnfolder]: For 521/521 co-relation queries the response was YES. [2023-09-01 12:22:00,500 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1636 conditions, 412 events. 207/412 cut-off events. For 521/521 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1188 event pairs, 67 based on Foata normal form. 14/366 useless extension candidates. Maximal degree in co-relation 1382. Up to 297 conditions per place. [2023-09-01 12:22:00,502 INFO L137 encePairwiseOnDemand]: 978/983 looper letters, 111 selfloop transitions, 4 changer transitions 0/115 dead transitions. [2023-09-01 12:22:00,503 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 115 transitions, 1043 flow [2023-09-01 12:22:00,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 12:22:00,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 12:22:00,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1211 transitions. [2023-09-01 12:22:00,506 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41064767717870465 [2023-09-01 12:22:00,506 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1211 transitions. [2023-09-01 12:22:00,506 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1211 transitions. [2023-09-01 12:22:00,506 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 12:22:00,506 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1211 transitions. [2023-09-01 12:22:00,508 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 403.6666666666667) internal successors, (1211), 3 states have internal predecessors, (1211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:22:00,511 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 983.0) internal successors, (3932), 4 states have internal predecessors, (3932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:22:00,512 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 983.0) internal successors, (3932), 4 states have internal predecessors, (3932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:22:00,512 INFO L175 Difference]: Start difference. First operand has 89 places, 103 transitions, 763 flow. Second operand 3 states and 1211 transitions. [2023-09-01 12:22:00,512 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 115 transitions, 1043 flow [2023-09-01 12:22:00,516 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 115 transitions, 1040 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 12:22:00,518 INFO L231 Difference]: Finished difference. Result has 92 places, 105 transitions, 794 flow [2023-09-01 12:22:00,518 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=983, PETRI_DIFFERENCE_MINUEND_FLOW=760, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=794, PETRI_PLACES=92, PETRI_TRANSITIONS=105} [2023-09-01 12:22:00,519 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 62 predicate places. [2023-09-01 12:22:00,519 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 105 transitions, 794 flow [2023-09-01 12:22:00,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 397.3333333333333) internal successors, (1192), 3 states have internal predecessors, (1192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 12:22:00,519 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 12:22:00,519 INFO L208 CegarLoopForPetriNet]: trace histogram [13, 13, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 12:22:00,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-09-01 12:22:00,520 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 12:22:00,521 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 12:22:00,521 INFO L85 PathProgramCache]: Analyzing trace with hash 570594595, now seen corresponding path program 1 times [2023-09-01 12:22:00,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 12:22:00,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680123307] [2023-09-01 12:22:00,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:22:00,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 12:22:01,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:22:08,411 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 239 trivial. 0 not checked. [2023-09-01 12:22:08,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 12:22:08,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680123307] [2023-09-01 12:22:08,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680123307] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 12:22:08,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187148403] [2023-09-01 12:22:08,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 12:22:08,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 12:22:08,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 12:22:08,413 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) [2023-09-01 12:22:08,417 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-09-01 12:22:09,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 12:22:09,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 912 conjuncts, 42 conjunts are in the unsatisfiable core [2023-09-01 12:22:09,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 12:22:11,801 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:22:11,802 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 57 treesize of output 65 [2023-09-01 12:22:11,840 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-09-01 12:22:11,841 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 33 [2023-09-01 12:22:11,852 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-09-01 12:22:11,852 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 29 [2023-09-01 12:22:11,908 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2023-09-01 12:22:11,909 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 12:24:33,788 WARN L222 SmtUtils]: Spent 2.31m on a formula simplification. DAG size of input: 105 DAG size of output: 82 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 12:24:35,291 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 12:24:35,292 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 886 treesize of output 1231 Killed by 15