./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/parallel-misc-5.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/weaver/parallel-misc-5.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 3f696f3d7a078e1a0d9bb5ce793945c7092990826a45e57529562474d0b18f4a --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-31 01:56:37,259 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-31 01:56:37,261 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-31 01:56:37,304 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-31 01:56:37,306 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-31 01:56:37,308 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-31 01:56:37,310 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-31 01:56:37,313 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-31 01:56:37,314 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-31 01:56:37,318 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-31 01:56:37,319 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-31 01:56:37,321 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-31 01:56:37,321 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-31 01:56:37,323 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-31 01:56:37,324 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-31 01:56:37,329 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-31 01:56:37,330 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-31 01:56:37,331 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-31 01:56:37,332 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-31 01:56:37,337 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-31 01:56:37,344 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-31 01:56:37,345 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-31 01:56:37,346 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-31 01:56:37,348 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-31 01:56:37,354 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-31 01:56:37,355 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-31 01:56:37,355 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-31 01:56:37,357 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-31 01:56:37,357 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-31 01:56:37,358 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-31 01:56:37,358 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-31 01:56:37,363 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-31 01:56:37,364 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-31 01:56:37,365 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-31 01:56:37,366 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-31 01:56:37,366 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-31 01:56:37,367 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-31 01:56:37,367 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-31 01:56:37,368 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-31 01:56:37,368 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-31 01:56:37,369 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-31 01:56:37,371 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-31 01:56:37,402 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-31 01:56:37,403 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-31 01:56:37,404 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-31 01:56:37,404 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-31 01:56:37,405 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-31 01:56:37,405 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-31 01:56:37,405 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-31 01:56:37,406 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-31 01:56:37,406 INFO L138 SettingsManager]: * Use SBE=true [2023-08-31 01:56:37,406 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-31 01:56:37,407 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-31 01:56:37,407 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-31 01:56:37,407 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-31 01:56:37,407 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-31 01:56:37,408 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-31 01:56:37,408 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-31 01:56:37,408 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-31 01:56:37,408 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-31 01:56:37,408 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-31 01:56:37,408 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-31 01:56:37,409 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-31 01:56:37,409 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-31 01:56:37,409 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-31 01:56:37,409 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-31 01:56:37,409 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 01:56:37,410 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-31 01:56:37,410 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-31 01:56:37,410 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-31 01:56:37,410 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-31 01:56:37,411 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-31 01:56:37,411 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-31 01:56:37,411 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-31 01:56:37,411 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-31 01:56:37,411 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-31 01:56:37,412 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-31 01:56:37,412 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3f696f3d7a078e1a0d9bb5ce793945c7092990826a45e57529562474d0b18f4a Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-31 01:56:37,698 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-31 01:56:37,715 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-31 01:56:37,717 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-31 01:56:37,718 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-31 01:56:37,718 INFO L275 PluginConnector]: CDTParser initialized [2023-08-31 01:56:37,720 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/parallel-misc-5.wvr.c [2023-08-31 01:56:38,826 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-31 01:56:39,006 INFO L351 CDTParser]: Found 1 translation units. [2023-08-31 01:56:39,007 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-misc-5.wvr.c [2023-08-31 01:56:39,012 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/28747497f/5293cb6b03464bada2979f68a29c5b04/FLAG5738d4de9 [2023-08-31 01:56:39,024 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/28747497f/5293cb6b03464bada2979f68a29c5b04 [2023-08-31 01:56:39,026 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-31 01:56:39,027 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-31 01:56:39,028 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-31 01:56:39,028 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-31 01:56:39,033 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-31 01:56:39,034 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 01:56:39" (1/1) ... [2023-08-31 01:56:39,035 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ac2c2d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:56:39, skipping insertion in model container [2023-08-31 01:56:39,035 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 01:56:39" (1/1) ... [2023-08-31 01:56:39,040 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-31 01:56:39,060 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-31 01:56:39,236 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/parallel-misc-5.wvr.c[3027,3040] [2023-08-31 01:56:39,246 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 01:56:39,256 INFO L203 MainTranslator]: Completed pre-run [2023-08-31 01:56:39,290 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/parallel-misc-5.wvr.c[3027,3040] [2023-08-31 01:56:39,293 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 01:56:39,301 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-31 01:56:39,301 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-31 01:56:39,307 INFO L208 MainTranslator]: Completed translation [2023-08-31 01:56:39,307 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:56:39 WrapperNode [2023-08-31 01:56:39,307 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-31 01:56:39,309 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-31 01:56:39,309 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-31 01:56:39,309 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-31 01:56:39,314 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:56:39" (1/1) ... [2023-08-31 01:56:39,330 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:56:39" (1/1) ... [2023-08-31 01:56:39,359 INFO L138 Inliner]: procedures = 22, calls = 45, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 149 [2023-08-31 01:56:39,359 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-31 01:56:39,360 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-31 01:56:39,361 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-31 01:56:39,361 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-31 01:56:39,368 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:56:39" (1/1) ... [2023-08-31 01:56:39,369 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:56:39" (1/1) ... [2023-08-31 01:56:39,379 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:56:39" (1/1) ... [2023-08-31 01:56:39,380 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:56:39" (1/1) ... [2023-08-31 01:56:39,386 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:56:39" (1/1) ... [2023-08-31 01:56:39,393 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:56:39" (1/1) ... [2023-08-31 01:56:39,394 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:56:39" (1/1) ... [2023-08-31 01:56:39,395 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:56:39" (1/1) ... [2023-08-31 01:56:39,396 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-31 01:56:39,397 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-31 01:56:39,397 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-31 01:56:39,397 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-31 01:56:39,399 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:56:39" (1/1) ... [2023-08-31 01:56:39,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 01:56:39,420 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:56:39,431 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-31 01:56:39,453 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-31 01:56:39,468 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-31 01:56:39,469 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-31 01:56:39,469 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-31 01:56:39,469 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-31 01:56:39,469 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-31 01:56:39,470 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-31 01:56:39,470 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-31 01:56:39,470 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-31 01:56:39,470 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-31 01:56:39,470 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-31 01:56:39,470 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-31 01:56:39,470 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-31 01:56:39,471 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-31 01:56:39,471 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-31 01:56:39,471 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-31 01:56:39,471 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-31 01:56:39,472 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-31 01:56:39,579 INFO L236 CfgBuilder]: Building ICFG [2023-08-31 01:56:39,581 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-31 01:56:39,827 INFO L277 CfgBuilder]: Performing block encoding [2023-08-31 01:56:39,912 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-31 01:56:39,912 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-08-31 01:56:39,914 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 01:56:39 BoogieIcfgContainer [2023-08-31 01:56:39,914 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-31 01:56:39,916 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-31 01:56:39,916 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-31 01:56:39,919 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-31 01:56:39,920 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.08 01:56:39" (1/3) ... [2023-08-31 01:56:39,920 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1901c11 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 01:56:39, skipping insertion in model container [2023-08-31 01:56:39,920 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:56:39" (2/3) ... [2023-08-31 01:56:39,929 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1901c11 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 01:56:39, skipping insertion in model container [2023-08-31 01:56:39,929 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 01:56:39" (3/3) ... [2023-08-31 01:56:39,930 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-misc-5.wvr.c [2023-08-31 01:56:39,938 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-31 01:56:39,945 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-31 01:56:39,945 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-31 01:56:39,945 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-31 01:56:40,007 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-31 01:56:40,039 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 112 places, 109 transitions, 242 flow [2023-08-31 01:56:40,091 INFO L130 PetriNetUnfolder]: 7/106 cut-off events. [2023-08-31 01:56:40,091 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-31 01:56:40,096 INFO L83 FinitePrefix]: Finished finitePrefix Result has 119 conditions, 106 events. 7/106 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 84 event pairs, 0 based on Foata normal form. 0/98 useless extension candidates. Maximal degree in co-relation 84. Up to 2 conditions per place. [2023-08-31 01:56:40,096 INFO L82 GeneralOperation]: Start removeDead. Operand has 112 places, 109 transitions, 242 flow [2023-08-31 01:56:40,099 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 99 places, 96 transitions, 210 flow [2023-08-31 01:56:40,102 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 01:56:40,110 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 99 places, 96 transitions, 210 flow [2023-08-31 01:56:40,112 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 99 places, 96 transitions, 210 flow [2023-08-31 01:56:40,113 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 99 places, 96 transitions, 210 flow [2023-08-31 01:56:40,145 INFO L130 PetriNetUnfolder]: 7/96 cut-off events. [2023-08-31 01:56:40,146 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-31 01:56:40,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109 conditions, 96 events. 7/96 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 85 event pairs, 0 based on Foata normal form. 0/89 useless extension candidates. Maximal degree in co-relation 84. Up to 2 conditions per place. [2023-08-31 01:56:40,148 INFO L119 LiptonReduction]: Number of co-enabled transitions 1370 [2023-08-31 01:56:43,346 INFO L134 LiptonReduction]: Checked pairs total: 1979 [2023-08-31 01:56:43,346 INFO L136 LiptonReduction]: Total number of compositions: 79 [2023-08-31 01:56:43,359 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-31 01:56:43,364 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;@5abc3cf8, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 01:56:43,364 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-31 01:56:43,370 INFO L130 PetriNetUnfolder]: 2/21 cut-off events. [2023-08-31 01:56:43,370 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-31 01:56:43,371 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:56:43,371 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:56:43,372 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 01:56:43,375 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:56:43,376 INFO L85 PathProgramCache]: Analyzing trace with hash -771544553, now seen corresponding path program 1 times [2023-08-31 01:56:43,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:56:43,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296130283] [2023-08-31 01:56:43,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:56:43,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:56:43,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:56:44,095 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:56:44,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:56:44,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296130283] [2023-08-31 01:56:44,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296130283] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 01:56:44,096 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 01:56:44,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-31 01:56:44,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002495103] [2023-08-31 01:56:44,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 01:56:44,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-31 01:56:44,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:56:44,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-31 01:56:44,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-31 01:56:44,177 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 188 [2023-08-31 01:56:44,183 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 22 transitions, 62 flow. Second operand has 5 states, 5 states have (on average 90.4) internal successors, (452), 5 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:56:44,183 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:56:44,183 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 188 [2023-08-31 01:56:44,184 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:56:44,431 INFO L130 PetriNetUnfolder]: 348/576 cut-off events. [2023-08-31 01:56:44,431 INFO L131 PetriNetUnfolder]: For 70/70 co-relation queries the response was YES. [2023-08-31 01:56:44,435 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1205 conditions, 576 events. 348/576 cut-off events. For 70/70 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 2317 event pairs, 49 based on Foata normal form. 0/447 useless extension candidates. Maximal degree in co-relation 929. Up to 297 conditions per place. [2023-08-31 01:56:44,440 INFO L137 encePairwiseOnDemand]: 181/188 looper letters, 50 selfloop transitions, 5 changer transitions 18/75 dead transitions. [2023-08-31 01:56:44,441 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 75 transitions, 350 flow [2023-08-31 01:56:44,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-31 01:56:44,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-31 01:56:44,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 684 transitions. [2023-08-31 01:56:44,464 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5197568389057751 [2023-08-31 01:56:44,465 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 684 transitions. [2023-08-31 01:56:44,465 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 684 transitions. [2023-08-31 01:56:44,469 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:56:44,471 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 684 transitions. [2023-08-31 01:56:44,476 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 97.71428571428571) internal successors, (684), 7 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:56:44,482 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 188.0) internal successors, (1504), 8 states have internal predecessors, (1504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:56:44,483 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 188.0) internal successors, (1504), 8 states have internal predecessors, (1504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:56:44,485 INFO L175 Difference]: Start difference. First operand has 30 places, 22 transitions, 62 flow. Second operand 7 states and 684 transitions. [2023-08-31 01:56:44,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 75 transitions, 350 flow [2023-08-31 01:56:44,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 75 transitions, 314 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-31 01:56:44,492 INFO L231 Difference]: Finished difference. Result has 35 places, 26 transitions, 99 flow [2023-08-31 01:56:44,493 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=188, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=99, PETRI_PLACES=35, PETRI_TRANSITIONS=26} [2023-08-31 01:56:44,501 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 5 predicate places. [2023-08-31 01:56:44,502 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 26 transitions, 99 flow [2023-08-31 01:56:44,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 90.4) internal successors, (452), 5 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:56:44,503 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:56:44,506 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:56:44,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-31 01:56:44,507 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 01:56:44,513 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:56:44,514 INFO L85 PathProgramCache]: Analyzing trace with hash -1110178059, now seen corresponding path program 2 times [2023-08-31 01:56:44,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:56:44,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443206025] [2023-08-31 01:56:44,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:56:44,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:56:44,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:56:44,943 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:56:44,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:56:44,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443206025] [2023-08-31 01:56:44,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443206025] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 01:56:44,944 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 01:56:44,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-31 01:56:44,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813143811] [2023-08-31 01:56:44,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 01:56:44,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-31 01:56:44,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:56:44,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-31 01:56:44,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-31 01:56:44,979 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 188 [2023-08-31 01:56:44,980 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 26 transitions, 99 flow. Second operand has 4 states, 4 states have (on average 93.25) internal successors, (373), 4 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:56:44,980 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:56:44,981 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 188 [2023-08-31 01:56:44,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:56:45,095 INFO L130 PetriNetUnfolder]: 251/422 cut-off events. [2023-08-31 01:56:45,096 INFO L131 PetriNetUnfolder]: For 644/660 co-relation queries the response was YES. [2023-08-31 01:56:45,097 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1362 conditions, 422 events. 251/422 cut-off events. For 644/660 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1529 event pairs, 23 based on Foata normal form. 24/432 useless extension candidates. Maximal degree in co-relation 841. Up to 244 conditions per place. [2023-08-31 01:56:45,099 INFO L137 encePairwiseOnDemand]: 184/188 looper letters, 34 selfloop transitions, 6 changer transitions 0/42 dead transitions. [2023-08-31 01:56:45,099 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 42 transitions, 248 flow [2023-08-31 01:56:45,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-31 01:56:45,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-31 01:56:45,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 391 transitions. [2023-08-31 01:56:45,101 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5199468085106383 [2023-08-31 01:56:45,102 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 391 transitions. [2023-08-31 01:56:45,102 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 391 transitions. [2023-08-31 01:56:45,102 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:56:45,102 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 391 transitions. [2023-08-31 01:56:45,104 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 97.75) internal successors, (391), 4 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:56:45,105 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 188.0) internal successors, (940), 5 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:56:45,106 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 188.0) internal successors, (940), 5 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:56:45,106 INFO L175 Difference]: Start difference. First operand has 35 places, 26 transitions, 99 flow. Second operand 4 states and 391 transitions. [2023-08-31 01:56:45,106 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 42 transitions, 248 flow [2023-08-31 01:56:45,109 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 42 transitions, 233 flow, removed 3 selfloop flow, removed 3 redundant places. [2023-08-31 01:56:45,110 INFO L231 Difference]: Finished difference. Result has 35 places, 29 transitions, 124 flow [2023-08-31 01:56:45,110 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=188, PETRI_DIFFERENCE_MINUEND_FLOW=91, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=124, PETRI_PLACES=35, PETRI_TRANSITIONS=29} [2023-08-31 01:56:45,111 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 5 predicate places. [2023-08-31 01:56:45,111 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 29 transitions, 124 flow [2023-08-31 01:56:45,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 93.25) internal successors, (373), 4 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:56:45,111 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:56:45,111 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:56:45,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-31 01:56:45,112 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 01:56:45,114 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:56:45,114 INFO L85 PathProgramCache]: Analyzing trace with hash 2127314941, now seen corresponding path program 3 times [2023-08-31 01:56:45,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:56:45,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36067915] [2023-08-31 01:56:45,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:56:45,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:56:45,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:56:45,317 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:56:45,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:56:45,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36067915] [2023-08-31 01:56:45,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36067915] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 01:56:45,318 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 01:56:45,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-31 01:56:45,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56293277] [2023-08-31 01:56:45,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 01:56:45,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-31 01:56:45,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:56:45,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-31 01:56:45,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-31 01:56:45,355 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 188 [2023-08-31 01:56:45,356 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 29 transitions, 124 flow. Second operand has 4 states, 4 states have (on average 92.25) internal successors, (369), 4 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:56:45,356 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:56:45,356 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 188 [2023-08-31 01:56:45,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:56:45,455 INFO L130 PetriNetUnfolder]: 162/285 cut-off events. [2023-08-31 01:56:45,455 INFO L131 PetriNetUnfolder]: For 448/464 co-relation queries the response was YES. [2023-08-31 01:56:45,456 INFO L83 FinitePrefix]: Finished finitePrefix Result has 985 conditions, 285 events. 162/285 cut-off events. For 448/464 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 970 event pairs, 17 based on Foata normal form. 52/335 useless extension candidates. Maximal degree in co-relation 870. Up to 117 conditions per place. [2023-08-31 01:56:45,458 INFO L137 encePairwiseOnDemand]: 182/188 looper letters, 33 selfloop transitions, 7 changer transitions 6/49 dead transitions. [2023-08-31 01:56:45,458 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 49 transitions, 318 flow [2023-08-31 01:56:45,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-31 01:56:45,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-31 01:56:45,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 478 transitions. [2023-08-31 01:56:45,460 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5085106382978724 [2023-08-31 01:56:45,460 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 478 transitions. [2023-08-31 01:56:45,460 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 478 transitions. [2023-08-31 01:56:45,460 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:56:45,461 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 478 transitions. [2023-08-31 01:56:45,462 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 95.6) internal successors, (478), 5 states have internal predecessors, (478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:56:45,464 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 188.0) internal successors, (1128), 6 states have internal predecessors, (1128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:56:45,464 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 188.0) internal successors, (1128), 6 states have internal predecessors, (1128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:56:45,465 INFO L175 Difference]: Start difference. First operand has 35 places, 29 transitions, 124 flow. Second operand 5 states and 478 transitions. [2023-08-31 01:56:45,465 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 49 transitions, 318 flow [2023-08-31 01:56:45,466 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 49 transitions, 310 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-31 01:56:45,467 INFO L231 Difference]: Finished difference. Result has 42 places, 30 transitions, 160 flow [2023-08-31 01:56:45,468 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=188, PETRI_DIFFERENCE_MINUEND_FLOW=119, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=160, PETRI_PLACES=42, PETRI_TRANSITIONS=30} [2023-08-31 01:56:45,468 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 12 predicate places. [2023-08-31 01:56:45,468 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 30 transitions, 160 flow [2023-08-31 01:56:45,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 92.25) internal successors, (369), 4 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:56:45,469 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:56:45,469 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] [2023-08-31 01:56:45,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-31 01:56:45,470 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 01:56:45,470 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:56:45,470 INFO L85 PathProgramCache]: Analyzing trace with hash 1776338007, now seen corresponding path program 1 times [2023-08-31 01:56:45,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:56:45,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663762029] [2023-08-31 01:56:45,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:56:45,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:56:45,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:56:45,702 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:56:45,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:56:45,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663762029] [2023-08-31 01:56:45,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663762029] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:56:45,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844681966] [2023-08-31 01:56:45,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:56:45,703 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:56:45,703 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:56:45,709 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:56:45,725 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-31 01:56:45,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:56:45,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-31 01:56:45,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:56:46,002 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:56:46,003 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:56:46,275 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:56:46,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1844681966] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:56:46,276 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:56:46,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-08-31 01:56:46,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611843002] [2023-08-31 01:56:46,277 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:56:46,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-31 01:56:46,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:56:46,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-31 01:56:46,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2023-08-31 01:56:46,336 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 188 [2023-08-31 01:56:46,338 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 30 transitions, 160 flow. Second operand has 12 states, 12 states have (on average 87.16666666666667) internal successors, (1046), 12 states have internal predecessors, (1046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:56:46,338 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:56:46,338 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 188 [2023-08-31 01:56:46,338 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:56:46,804 INFO L130 PetriNetUnfolder]: 422/744 cut-off events. [2023-08-31 01:56:46,804 INFO L131 PetriNetUnfolder]: For 2779/2834 co-relation queries the response was YES. [2023-08-31 01:56:46,807 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3011 conditions, 744 events. 422/744 cut-off events. For 2779/2834 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 3406 event pairs, 18 based on Foata normal form. 95/828 useless extension candidates. Maximal degree in co-relation 1802. Up to 321 conditions per place. [2023-08-31 01:56:46,810 INFO L137 encePairwiseOnDemand]: 181/188 looper letters, 81 selfloop transitions, 33 changer transitions 39/157 dead transitions. [2023-08-31 01:56:46,810 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 157 transitions, 1189 flow [2023-08-31 01:56:46,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-31 01:56:46,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-31 01:56:46,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1910 transitions. [2023-08-31 01:56:46,816 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4837892603850051 [2023-08-31 01:56:46,816 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1910 transitions. [2023-08-31 01:56:46,816 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1910 transitions. [2023-08-31 01:56:46,817 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:56:46,817 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1910 transitions. [2023-08-31 01:56:46,846 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 90.95238095238095) internal successors, (1910), 21 states have internal predecessors, (1910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:56:46,852 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 188.0) internal successors, (4136), 22 states have internal predecessors, (4136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:56:46,855 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 188.0) internal successors, (4136), 22 states have internal predecessors, (4136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:56:46,855 INFO L175 Difference]: Start difference. First operand has 42 places, 30 transitions, 160 flow. Second operand 21 states and 1910 transitions. [2023-08-31 01:56:46,855 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 157 transitions, 1189 flow [2023-08-31 01:56:46,860 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 157 transitions, 1181 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-08-31 01:56:46,862 INFO L231 Difference]: Finished difference. Result has 68 places, 61 transitions, 550 flow [2023-08-31 01:56:46,862 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=188, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=550, PETRI_PLACES=68, PETRI_TRANSITIONS=61} [2023-08-31 01:56:46,863 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 38 predicate places. [2023-08-31 01:56:46,864 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 61 transitions, 550 flow [2023-08-31 01:56:46,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 87.16666666666667) internal successors, (1046), 12 states have internal predecessors, (1046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:56:46,865 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:56:46,865 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] [2023-08-31 01:56:46,875 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-31 01:56:47,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:56:47,072 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 01:56:47,073 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:56:47,073 INFO L85 PathProgramCache]: Analyzing trace with hash -2050961286, now seen corresponding path program 1 times [2023-08-31 01:56:47,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:56:47,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602984962] [2023-08-31 01:56:47,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:56:47,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:56:47,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:56:47,302 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:56:47,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:56:47,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602984962] [2023-08-31 01:56:47,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602984962] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:56:47,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014647628] [2023-08-31 01:56:47,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:56:47,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:56:47,303 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:56:47,304 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:56:47,325 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-31 01:56:47,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:56:47,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-31 01:56:47,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:56:47,520 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:56:47,521 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:56:47,715 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:56:47,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2014647628] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:56:47,715 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:56:47,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-08-31 01:56:47,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949342583] [2023-08-31 01:56:47,716 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:56:47,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-31 01:56:47,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:56:47,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-31 01:56:47,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2023-08-31 01:56:47,771 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 188 [2023-08-31 01:56:47,772 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 61 transitions, 550 flow. Second operand has 11 states, 11 states have (on average 87.18181818181819) internal successors, (959), 11 states have internal predecessors, (959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:56:47,773 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:56:47,773 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 188 [2023-08-31 01:56:47,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:56:48,206 INFO L130 PetriNetUnfolder]: 430/740 cut-off events. [2023-08-31 01:56:48,207 INFO L131 PetriNetUnfolder]: For 5633/5645 co-relation queries the response was YES. [2023-08-31 01:56:48,208 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3756 conditions, 740 events. 430/740 cut-off events. For 5633/5645 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 3145 event pairs, 8 based on Foata normal form. 44/779 useless extension candidates. Maximal degree in co-relation 2681. Up to 327 conditions per place. [2023-08-31 01:56:48,212 INFO L137 encePairwiseOnDemand]: 181/188 looper letters, 61 selfloop transitions, 25 changer transitions 64/156 dead transitions. [2023-08-31 01:56:48,212 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 156 transitions, 1510 flow [2023-08-31 01:56:48,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-31 01:56:48,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-31 01:56:48,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1546 transitions. [2023-08-31 01:56:48,216 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.483729662077597 [2023-08-31 01:56:48,216 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1546 transitions. [2023-08-31 01:56:48,217 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1546 transitions. [2023-08-31 01:56:48,218 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:56:48,218 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1546 transitions. [2023-08-31 01:56:48,221 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 90.94117647058823) internal successors, (1546), 17 states have internal predecessors, (1546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:56:48,225 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 188.0) internal successors, (3384), 18 states have internal predecessors, (3384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:56:48,226 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 188.0) internal successors, (3384), 18 states have internal predecessors, (3384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:56:48,226 INFO L175 Difference]: Start difference. First operand has 68 places, 61 transitions, 550 flow. Second operand 17 states and 1546 transitions. [2023-08-31 01:56:48,227 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 156 transitions, 1510 flow [2023-08-31 01:56:48,239 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 156 transitions, 1138 flow, removed 174 selfloop flow, removed 10 redundant places. [2023-08-31 01:56:48,241 INFO L231 Difference]: Finished difference. Result has 73 places, 56 transitions, 403 flow [2023-08-31 01:56:48,241 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=188, PETRI_DIFFERENCE_MINUEND_FLOW=364, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=403, PETRI_PLACES=73, PETRI_TRANSITIONS=56} [2023-08-31 01:56:48,242 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 43 predicate places. [2023-08-31 01:56:48,242 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 56 transitions, 403 flow [2023-08-31 01:56:48,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 87.18181818181819) internal successors, (959), 11 states have internal predecessors, (959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:56:48,242 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:56:48,243 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:56:48,255 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-31 01:56:48,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:56:48,454 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 01:56:48,454 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:56:48,454 INFO L85 PathProgramCache]: Analyzing trace with hash 1700482413, now seen corresponding path program 2 times [2023-08-31 01:56:48,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:56:48,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614386632] [2023-08-31 01:56:48,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:56:48,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:56:48,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:56:48,822 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:56:48,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:56:48,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614386632] [2023-08-31 01:56:48,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614386632] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:56:48,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659993799] [2023-08-31 01:56:48,823 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 01:56:48,823 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:56:48,823 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:56:48,824 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:56:48,851 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-31 01:56:48,917 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 01:56:48,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:56:48,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-31 01:56:48,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:56:49,188 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:56:49,188 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:56:49,683 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:56:49,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [659993799] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:56:49,684 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:56:49,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2023-08-31 01:56:49,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385880201] [2023-08-31 01:56:49,684 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:56:49,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-31 01:56:49,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:56:49,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-31 01:56:49,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2023-08-31 01:56:49,768 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 188 [2023-08-31 01:56:49,770 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 56 transitions, 403 flow. Second operand has 18 states, 18 states have (on average 86.61111111111111) internal successors, (1559), 18 states have internal predecessors, (1559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:56:49,770 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:56:49,770 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 188 [2023-08-31 01:56:49,770 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:56:51,107 INFO L130 PetriNetUnfolder]: 830/1452 cut-off events. [2023-08-31 01:56:51,108 INFO L131 PetriNetUnfolder]: For 8077/8186 co-relation queries the response was YES. [2023-08-31 01:56:51,112 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7061 conditions, 1452 events. 830/1452 cut-off events. For 8077/8186 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 7349 event pairs, 22 based on Foata normal form. 127/1541 useless extension candidates. Maximal degree in co-relation 6285. Up to 596 conditions per place. [2023-08-31 01:56:51,118 INFO L137 encePairwiseOnDemand]: 181/188 looper letters, 138 selfloop transitions, 65 changer transitions 100/309 dead transitions. [2023-08-31 01:56:51,118 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 309 transitions, 2906 flow [2023-08-31 01:56:51,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-08-31 01:56:51,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2023-08-31 01:56:51,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 3538 transitions. [2023-08-31 01:56:51,128 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48254228041462083 [2023-08-31 01:56:51,128 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 3538 transitions. [2023-08-31 01:56:51,128 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 3538 transitions. [2023-08-31 01:56:51,130 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:56:51,130 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 3538 transitions. [2023-08-31 01:56:51,137 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 90.71794871794872) internal successors, (3538), 39 states have internal predecessors, (3538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:56:51,147 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 188.0) internal successors, (7520), 40 states have internal predecessors, (7520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:56:51,148 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 188.0) internal successors, (7520), 40 states have internal predecessors, (7520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:56:51,149 INFO L175 Difference]: Start difference. First operand has 73 places, 56 transitions, 403 flow. Second operand 39 states and 3538 transitions. [2023-08-31 01:56:51,149 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 309 transitions, 2906 flow [2023-08-31 01:56:51,179 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 309 transitions, 2466 flow, removed 167 selfloop flow, removed 12 redundant places. [2023-08-31 01:56:51,182 INFO L231 Difference]: Finished difference. Result has 96 places, 98 transitions, 869 flow [2023-08-31 01:56:51,182 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=188, PETRI_DIFFERENCE_MINUEND_FLOW=333, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=869, PETRI_PLACES=96, PETRI_TRANSITIONS=98} [2023-08-31 01:56:51,183 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 66 predicate places. [2023-08-31 01:56:51,183 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 98 transitions, 869 flow [2023-08-31 01:56:51,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 86.61111111111111) internal successors, (1559), 18 states have internal predecessors, (1559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:56:51,184 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:56:51,184 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:56:51,197 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-31 01:56:51,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:56:51,390 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 01:56:51,390 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:56:51,390 INFO L85 PathProgramCache]: Analyzing trace with hash -1615993566, now seen corresponding path program 1 times [2023-08-31 01:56:51,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:56:51,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015658002] [2023-08-31 01:56:51,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:56:51,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:56:51,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:56:51,730 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:56:51,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:56:51,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015658002] [2023-08-31 01:56:51,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015658002] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:56:51,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425163915] [2023-08-31 01:56:51,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:56:51,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:56:51,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:56:51,733 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:56:51,734 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-31 01:56:51,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:56:51,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-31 01:56:51,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:56:51,996 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:56:51,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:56:52,628 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:56:52,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1425163915] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:56:52,629 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:56:52,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2023-08-31 01:56:52,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632475818] [2023-08-31 01:56:52,629 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:56:52,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-31 01:56:52,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:56:52,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-31 01:56:52,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2023-08-31 01:56:52,713 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 188 [2023-08-31 01:56:52,715 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 98 transitions, 869 flow. Second operand has 19 states, 19 states have (on average 84.57894736842105) internal successors, (1607), 19 states have internal predecessors, (1607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:56:52,715 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:56:52,715 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 188 [2023-08-31 01:56:52,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:56:54,287 INFO L130 PetriNetUnfolder]: 1005/1811 cut-off events. [2023-08-31 01:56:54,288 INFO L131 PetriNetUnfolder]: For 10765/10800 co-relation queries the response was YES. [2023-08-31 01:56:54,294 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8782 conditions, 1811 events. 1005/1811 cut-off events. For 10765/10800 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 9749 event pairs, 0 based on Foata normal form. 93/1896 useless extension candidates. Maximal degree in co-relation 8198. Up to 655 conditions per place. [2023-08-31 01:56:54,301 INFO L137 encePairwiseOnDemand]: 181/188 looper letters, 148 selfloop transitions, 90 changer transitions 117/363 dead transitions. [2023-08-31 01:56:54,302 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 363 transitions, 3442 flow [2023-08-31 01:56:54,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-08-31 01:56:54,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2023-08-31 01:56:54,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 3468 transitions. [2023-08-31 01:56:54,309 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47299509001636664 [2023-08-31 01:56:54,309 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 3468 transitions. [2023-08-31 01:56:54,309 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 3468 transitions. [2023-08-31 01:56:54,311 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:56:54,311 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 3468 transitions. [2023-08-31 01:56:54,317 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 88.92307692307692) internal successors, (3468), 39 states have internal predecessors, (3468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:56:54,326 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 188.0) internal successors, (7520), 40 states have internal predecessors, (7520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:56:54,327 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 188.0) internal successors, (7520), 40 states have internal predecessors, (7520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:56:54,327 INFO L175 Difference]: Start difference. First operand has 96 places, 98 transitions, 869 flow. Second operand 39 states and 3468 transitions. [2023-08-31 01:56:54,327 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 363 transitions, 3442 flow [2023-08-31 01:56:54,411 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 363 transitions, 2686 flow, removed 331 selfloop flow, removed 14 redundant places. [2023-08-31 01:56:54,415 INFO L231 Difference]: Finished difference. Result has 119 places, 134 transitions, 1268 flow [2023-08-31 01:56:54,415 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=188, PETRI_DIFFERENCE_MINUEND_FLOW=639, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=1268, PETRI_PLACES=119, PETRI_TRANSITIONS=134} [2023-08-31 01:56:54,416 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 89 predicate places. [2023-08-31 01:56:54,416 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 134 transitions, 1268 flow [2023-08-31 01:56:54,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 84.57894736842105) internal successors, (1607), 19 states have internal predecessors, (1607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:56:54,417 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:56:54,417 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:56:54,424 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-31 01:56:54,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:56:54,624 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 01:56:54,624 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:56:54,624 INFO L85 PathProgramCache]: Analyzing trace with hash -1081110094, now seen corresponding path program 2 times [2023-08-31 01:56:54,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:56:54,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660757726] [2023-08-31 01:56:54,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:56:54,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:56:54,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:56:54,986 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:56:54,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:56:54,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660757726] [2023-08-31 01:56:54,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660757726] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:56:54,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712071286] [2023-08-31 01:56:54,990 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 01:56:54,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:56:54,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:56:54,991 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:56:54,994 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-31 01:56:55,074 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 01:56:55,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:56:55,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-31 01:56:55,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:56:55,244 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:56:55,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:56:55,828 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:56:55,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1712071286] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:56:55,829 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:56:55,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2023-08-31 01:56:55,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444114505] [2023-08-31 01:56:55,830 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:56:55,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-31 01:56:55,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:56:55,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-31 01:56:55,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2023-08-31 01:56:55,925 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 188 [2023-08-31 01:56:55,927 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 134 transitions, 1268 flow. Second operand has 18 states, 18 states have (on average 82.05555555555556) internal successors, (1477), 18 states have internal predecessors, (1477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:56:55,927 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:56:55,927 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 188 [2023-08-31 01:56:55,927 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:56:57,971 INFO L130 PetriNetUnfolder]: 1731/2800 cut-off events. [2023-08-31 01:56:57,971 INFO L131 PetriNetUnfolder]: For 13061/13061 co-relation queries the response was YES. [2023-08-31 01:56:57,981 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13074 conditions, 2800 events. 1731/2800 cut-off events. For 13061/13061 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 13588 event pairs, 41 based on Foata normal form. 144/2944 useless extension candidates. Maximal degree in co-relation 12547. Up to 691 conditions per place. [2023-08-31 01:56:57,995 INFO L137 encePairwiseOnDemand]: 179/188 looper letters, 188 selfloop transitions, 93 changer transitions 187/468 dead transitions. [2023-08-31 01:56:57,996 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 468 transitions, 4641 flow [2023-08-31 01:56:57,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2023-08-31 01:56:57,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2023-08-31 01:56:58,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 4376 transitions. [2023-08-31 01:56:58,002 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45640383813099705 [2023-08-31 01:56:58,003 INFO L72 ComplementDD]: Start complementDD. Operand 51 states and 4376 transitions. [2023-08-31 01:56:58,003 INFO L73 IsDeterministic]: Start isDeterministic. Operand 51 states and 4376 transitions. [2023-08-31 01:56:58,004 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:56:58,004 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 51 states and 4376 transitions. [2023-08-31 01:56:58,011 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 52 states, 51 states have (on average 85.80392156862744) internal successors, (4376), 51 states have internal predecessors, (4376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:56:58,021 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 52 states, 52 states have (on average 188.0) internal successors, (9776), 52 states have internal predecessors, (9776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:56:58,023 INFO L81 ComplementDD]: Finished complementDD. Result has 52 states, 52 states have (on average 188.0) internal successors, (9776), 52 states have internal predecessors, (9776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:56:58,023 INFO L175 Difference]: Start difference. First operand has 119 places, 134 transitions, 1268 flow. Second operand 51 states and 4376 transitions. [2023-08-31 01:56:58,023 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 468 transitions, 4641 flow [2023-08-31 01:56:58,133 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 468 transitions, 4056 flow, removed 175 selfloop flow, removed 22 redundant places. [2023-08-31 01:56:58,138 INFO L231 Difference]: Finished difference. Result has 163 places, 161 transitions, 1686 flow [2023-08-31 01:56:58,138 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=188, PETRI_DIFFERENCE_MINUEND_FLOW=993, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=1686, PETRI_PLACES=163, PETRI_TRANSITIONS=161} [2023-08-31 01:56:58,139 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 133 predicate places. [2023-08-31 01:56:58,139 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 161 transitions, 1686 flow [2023-08-31 01:56:58,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 82.05555555555556) internal successors, (1477), 18 states have internal predecessors, (1477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:56:58,140 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:56:58,140 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:56:58,151 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-08-31 01:56:58,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:56:58,346 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 01:56:58,346 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:56:58,347 INFO L85 PathProgramCache]: Analyzing trace with hash 364047418, now seen corresponding path program 2 times [2023-08-31 01:56:58,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:56:58,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230751810] [2023-08-31 01:56:58,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:56:58,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:56:58,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:56:58,680 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:56:58,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:56:58,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230751810] [2023-08-31 01:56:58,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230751810] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:56:58,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668194306] [2023-08-31 01:56:58,681 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 01:56:58,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:56:58,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:56:58,682 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:56:58,685 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-31 01:56:58,774 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 01:56:58,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:56:58,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-31 01:56:58,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:56:59,006 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:56:59,006 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:56:59,438 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:56:59,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1668194306] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:56:59,439 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:56:59,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2023-08-31 01:56:59,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078391117] [2023-08-31 01:56:59,439 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:56:59,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-31 01:56:59,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:56:59,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-31 01:56:59,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2023-08-31 01:56:59,539 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 188 [2023-08-31 01:56:59,540 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 161 transitions, 1686 flow. Second operand has 17 states, 17 states have (on average 84.29411764705883) internal successors, (1433), 17 states have internal predecessors, (1433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:56:59,540 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:56:59,540 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 188 [2023-08-31 01:56:59,540 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:57:01,443 INFO L130 PetriNetUnfolder]: 2002/3239 cut-off events. [2023-08-31 01:57:01,443 INFO L131 PetriNetUnfolder]: For 48926/48926 co-relation queries the response was YES. [2023-08-31 01:57:01,462 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18451 conditions, 3239 events. 2002/3239 cut-off events. For 48926/48926 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 16164 event pairs, 59 based on Foata normal form. 104/3343 useless extension candidates. Maximal degree in co-relation 17317. Up to 1026 conditions per place. [2023-08-31 01:57:01,480 INFO L137 encePairwiseOnDemand]: 178/188 looper letters, 212 selfloop transitions, 93 changer transitions 165/470 dead transitions. [2023-08-31 01:57:01,480 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 470 transitions, 5842 flow [2023-08-31 01:57:01,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-08-31 01:57:01,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2023-08-31 01:57:01,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 4302 transitions. [2023-08-31 01:57:01,486 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46699956578376034 [2023-08-31 01:57:01,486 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 4302 transitions. [2023-08-31 01:57:01,486 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 4302 transitions. [2023-08-31 01:57:01,487 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:57:01,487 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 4302 transitions. [2023-08-31 01:57:01,493 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 87.79591836734694) internal successors, (4302), 49 states have internal predecessors, (4302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:57:01,501 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 188.0) internal successors, (9400), 50 states have internal predecessors, (9400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:57:01,502 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 188.0) internal successors, (9400), 50 states have internal predecessors, (9400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:57:01,502 INFO L175 Difference]: Start difference. First operand has 163 places, 161 transitions, 1686 flow. Second operand 49 states and 4302 transitions. [2023-08-31 01:57:01,502 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 470 transitions, 5842 flow [2023-08-31 01:57:01,654 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 470 transitions, 4865 flow, removed 471 selfloop flow, removed 28 redundant places. [2023-08-31 01:57:01,659 INFO L231 Difference]: Finished difference. Result has 184 places, 198 transitions, 2215 flow [2023-08-31 01:57:01,660 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=188, PETRI_DIFFERENCE_MINUEND_FLOW=1423, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=2215, PETRI_PLACES=184, PETRI_TRANSITIONS=198} [2023-08-31 01:57:01,660 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 154 predicate places. [2023-08-31 01:57:01,660 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 198 transitions, 2215 flow [2023-08-31 01:57:01,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 84.29411764705883) internal successors, (1433), 17 states have internal predecessors, (1433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:57:01,661 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:57:01,661 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:57:01,673 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-08-31 01:57:01,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:57:01,872 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 01:57:01,872 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:57:01,872 INFO L85 PathProgramCache]: Analyzing trace with hash 563170391, now seen corresponding path program 3 times [2023-08-31 01:57:01,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:57:01,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996384313] [2023-08-31 01:57:01,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:57:01,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:57:01,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:57:02,299 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:57:02,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:57:02,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996384313] [2023-08-31 01:57:02,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996384313] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:57:02,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457803024] [2023-08-31 01:57:02,300 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 01:57:02,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:57:02,300 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:57:02,301 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:57:02,313 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-31 01:57:02,403 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-08-31 01:57:02,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:57:02,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-31 01:57:02,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:57:02,639 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:57:02,640 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:57:03,599 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:57:03,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1457803024] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:57:03,599 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:57:03,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2023-08-31 01:57:03,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576059049] [2023-08-31 01:57:03,600 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:57:03,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-31 01:57:03,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:57:03,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-31 01:57:03,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2023-08-31 01:57:03,716 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 188 [2023-08-31 01:57:03,717 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 198 transitions, 2215 flow. Second operand has 21 states, 21 states have (on average 84.61904761904762) internal successors, (1777), 21 states have internal predecessors, (1777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:57:03,717 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:57:03,717 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 188 [2023-08-31 01:57:03,717 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:57:06,223 INFO L130 PetriNetUnfolder]: 1898/3370 cut-off events. [2023-08-31 01:57:06,224 INFO L131 PetriNetUnfolder]: For 111673/111990 co-relation queries the response was YES. [2023-08-31 01:57:06,242 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25623 conditions, 3370 events. 1898/3370 cut-off events. For 111673/111990 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 20375 event pairs, 8 based on Foata normal form. 219/3537 useless extension candidates. Maximal degree in co-relation 24101. Up to 881 conditions per place. [2023-08-31 01:57:06,262 INFO L137 encePairwiseOnDemand]: 181/188 looper letters, 247 selfloop transitions, 152 changer transitions 143/558 dead transitions. [2023-08-31 01:57:06,262 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 558 transitions, 8423 flow [2023-08-31 01:57:06,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2023-08-31 01:57:06,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2023-08-31 01:57:06,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 4601 transitions. [2023-08-31 01:57:06,268 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47064238952536824 [2023-08-31 01:57:06,269 INFO L72 ComplementDD]: Start complementDD. Operand 52 states and 4601 transitions. [2023-08-31 01:57:06,269 INFO L73 IsDeterministic]: Start isDeterministic. Operand 52 states and 4601 transitions. [2023-08-31 01:57:06,270 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:57:06,270 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 52 states and 4601 transitions. [2023-08-31 01:57:06,276 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 53 states, 52 states have (on average 88.48076923076923) internal successors, (4601), 52 states have internal predecessors, (4601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:57:06,284 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 53 states, 53 states have (on average 188.0) internal successors, (9964), 53 states have internal predecessors, (9964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:57:06,286 INFO L81 ComplementDD]: Finished complementDD. Result has 53 states, 53 states have (on average 188.0) internal successors, (9964), 53 states have internal predecessors, (9964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:57:06,286 INFO L175 Difference]: Start difference. First operand has 184 places, 198 transitions, 2215 flow. Second operand 52 states and 4601 transitions. [2023-08-31 01:57:06,286 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 558 transitions, 8423 flow [2023-08-31 01:57:06,489 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 558 transitions, 6626 flow, removed 882 selfloop flow, removed 31 redundant places. [2023-08-31 01:57:06,494 INFO L231 Difference]: Finished difference. Result has 188 places, 271 transitions, 3342 flow [2023-08-31 01:57:06,494 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=188, PETRI_DIFFERENCE_MINUEND_FLOW=1878, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=52, PETRI_FLOW=3342, PETRI_PLACES=188, PETRI_TRANSITIONS=271} [2023-08-31 01:57:06,495 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 158 predicate places. [2023-08-31 01:57:06,495 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 271 transitions, 3342 flow [2023-08-31 01:57:06,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 84.61904761904762) internal successors, (1777), 21 states have internal predecessors, (1777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:57:06,496 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:57:06,496 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:57:06,502 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-31 01:57:06,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:57:06,702 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 01:57:06,702 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:57:06,702 INFO L85 PathProgramCache]: Analyzing trace with hash 297215833, now seen corresponding path program 4 times [2023-08-31 01:57:06,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:57:06,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599298980] [2023-08-31 01:57:06,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:57:06,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:57:06,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:57:07,229 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:57:07,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:57:07,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599298980] [2023-08-31 01:57:07,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599298980] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:57:07,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992013150] [2023-08-31 01:57:07,231 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-31 01:57:07,231 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:57:07,231 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:57:07,233 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:57:07,257 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-31 01:57:07,322 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-31 01:57:07,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:57:07,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-31 01:57:07,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:57:07,650 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:57:07,651 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:57:08,758 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:57:08,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1992013150] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:57:08,759 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:57:08,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2023-08-31 01:57:08,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420998163] [2023-08-31 01:57:08,759 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:57:08,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-31 01:57:08,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:57:08,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-31 01:57:08,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=475, Unknown=0, NotChecked=0, Total=600 [2023-08-31 01:57:08,902 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 188 [2023-08-31 01:57:08,903 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 271 transitions, 3342 flow. Second operand has 25 states, 25 states have (on average 84.32) internal successors, (2108), 25 states have internal predecessors, (2108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:57:08,904 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:57:08,904 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 188 [2023-08-31 01:57:08,904 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:57:12,851 INFO L130 PetriNetUnfolder]: 3060/5420 cut-off events. [2023-08-31 01:57:12,852 INFO L131 PetriNetUnfolder]: For 97652/97983 co-relation queries the response was YES. [2023-08-31 01:57:12,872 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36830 conditions, 5420 events. 3060/5420 cut-off events. For 97652/97983 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 35551 event pairs, 34 based on Foata normal form. 311/5651 useless extension candidates. Maximal degree in co-relation 36146. Up to 1377 conditions per place. [2023-08-31 01:57:12,893 INFO L137 encePairwiseOnDemand]: 181/188 looper letters, 290 selfloop transitions, 254 changer transitions 342/901 dead transitions. [2023-08-31 01:57:12,893 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 901 transitions, 12498 flow [2023-08-31 01:57:12,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2023-08-31 01:57:12,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2023-08-31 01:57:12,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 6953 transitions. [2023-08-31 01:57:12,900 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4741543917075832 [2023-08-31 01:57:12,901 INFO L72 ComplementDD]: Start complementDD. Operand 78 states and 6953 transitions. [2023-08-31 01:57:12,901 INFO L73 IsDeterministic]: Start isDeterministic. Operand 78 states and 6953 transitions. [2023-08-31 01:57:12,902 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:57:12,903 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 78 states and 6953 transitions. [2023-08-31 01:57:12,911 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 79 states, 78 states have (on average 89.14102564102564) internal successors, (6953), 78 states have internal predecessors, (6953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:57:12,923 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 79 states, 79 states have (on average 188.0) internal successors, (14852), 79 states have internal predecessors, (14852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:57:12,925 INFO L81 ComplementDD]: Finished complementDD. Result has 79 states, 79 states have (on average 188.0) internal successors, (14852), 79 states have internal predecessors, (14852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:57:12,925 INFO L175 Difference]: Start difference. First operand has 188 places, 271 transitions, 3342 flow. Second operand 78 states and 6953 transitions. [2023-08-31 01:57:12,925 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 901 transitions, 12498 flow [2023-08-31 01:57:13,518 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 901 transitions, 11020 flow, removed 730 selfloop flow, removed 14 redundant places. [2023-08-31 01:57:13,525 INFO L231 Difference]: Finished difference. Result has 255 places, 361 transitions, 5001 flow [2023-08-31 01:57:13,525 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=188, PETRI_DIFFERENCE_MINUEND_FLOW=2914, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=166, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=78, PETRI_FLOW=5001, PETRI_PLACES=255, PETRI_TRANSITIONS=361} [2023-08-31 01:57:13,526 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 225 predicate places. [2023-08-31 01:57:13,526 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 361 transitions, 5001 flow [2023-08-31 01:57:13,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 84.32) internal successors, (2108), 25 states have internal predecessors, (2108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:57:13,527 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:57:13,527 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:57:13,537 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-31 01:57:13,732 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,SelfDestructingSolverStorable10 [2023-08-31 01:57:13,733 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 01:57:13,733 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:57:13,733 INFO L85 PathProgramCache]: Analyzing trace with hash 915863082, now seen corresponding path program 5 times [2023-08-31 01:57:13,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:57:13,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696070692] [2023-08-31 01:57:13,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:57:13,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:57:13,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:57:14,201 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:57:14,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:57:14,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696070692] [2023-08-31 01:57:14,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696070692] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:57:14,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107212862] [2023-08-31 01:57:14,203 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-31 01:57:14,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:57:14,203 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:57:14,204 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:57:14,206 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-31 01:57:14,296 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2023-08-31 01:57:14,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:57:14,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-31 01:57:14,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:57:14,685 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:57:14,685 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:57:15,816 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:57:15,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2107212862] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:57:15,816 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:57:15,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2023-08-31 01:57:15,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867268583] [2023-08-31 01:57:15,817 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:57:15,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-31 01:57:15,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:57:15,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-31 01:57:15,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=475, Unknown=0, NotChecked=0, Total=600 [2023-08-31 01:57:15,996 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 188 [2023-08-31 01:57:15,998 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 361 transitions, 5001 flow. Second operand has 25 states, 25 states have (on average 84.56) internal successors, (2114), 25 states have internal predecessors, (2114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:57:15,998 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:57:15,998 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 188 [2023-08-31 01:57:15,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:57:19,661 INFO L130 PetriNetUnfolder]: 3239/5749 cut-off events. [2023-08-31 01:57:19,661 INFO L131 PetriNetUnfolder]: For 171465/171808 co-relation queries the response was YES. [2023-08-31 01:57:19,687 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44413 conditions, 5749 events. 3239/5749 cut-off events. For 171465/171808 co-relation queries the response was YES. Maximal size of possible extension queue 290. Compared 38196 event pairs, 14 based on Foata normal form. 323/5992 useless extension candidates. Maximal degree in co-relation 44253. Up to 1495 conditions per place. [2023-08-31 01:57:19,711 INFO L137 encePairwiseOnDemand]: 181/188 looper letters, 307 selfloop transitions, 257 changer transitions 271/855 dead transitions. [2023-08-31 01:57:19,711 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 855 transitions, 14219 flow [2023-08-31 01:57:19,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2023-08-31 01:57:19,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2023-08-31 01:57:19,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 5741 transitions. [2023-08-31 01:57:19,718 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4698036006546645 [2023-08-31 01:57:19,718 INFO L72 ComplementDD]: Start complementDD. Operand 65 states and 5741 transitions. [2023-08-31 01:57:19,718 INFO L73 IsDeterministic]: Start isDeterministic. Operand 65 states and 5741 transitions. [2023-08-31 01:57:19,719 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:57:19,720 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 65 states and 5741 transitions. [2023-08-31 01:57:19,726 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 66 states, 65 states have (on average 88.32307692307693) internal successors, (5741), 65 states have internal predecessors, (5741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:57:19,733 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 66 states, 66 states have (on average 188.0) internal successors, (12408), 66 states have internal predecessors, (12408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:57:19,735 INFO L81 ComplementDD]: Finished complementDD. Result has 66 states, 66 states have (on average 188.0) internal successors, (12408), 66 states have internal predecessors, (12408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:57:19,735 INFO L175 Difference]: Start difference. First operand has 255 places, 361 transitions, 5001 flow. Second operand 65 states and 5741 transitions. [2023-08-31 01:57:19,735 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 855 transitions, 14219 flow [2023-08-31 01:57:21,170 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 855 transitions, 11271 flow, removed 1427 selfloop flow, removed 36 redundant places. [2023-08-31 01:57:21,178 INFO L231 Difference]: Finished difference. Result has 275 places, 422 transitions, 5858 flow [2023-08-31 01:57:21,178 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=188, PETRI_DIFFERENCE_MINUEND_FLOW=4040, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=361, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=183, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=65, PETRI_FLOW=5858, PETRI_PLACES=275, PETRI_TRANSITIONS=422} [2023-08-31 01:57:21,178 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 245 predicate places. [2023-08-31 01:57:21,179 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 422 transitions, 5858 flow [2023-08-31 01:57:21,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 84.56) internal successors, (2114), 25 states have internal predecessors, (2114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:57:21,179 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:57:21,179 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:57:21,185 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-08-31 01:57:21,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:57:21,380 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 01:57:21,380 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:57:21,381 INFO L85 PathProgramCache]: Analyzing trace with hash -1511671080, now seen corresponding path program 6 times [2023-08-31 01:57:21,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:57:21,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654676859] [2023-08-31 01:57:21,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:57:21,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:57:21,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:57:21,832 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:57:21,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:57:21,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654676859] [2023-08-31 01:57:21,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654676859] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:57:21,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043911410] [2023-08-31 01:57:21,834 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-31 01:57:21,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:57:21,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:57:21,835 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:57:21,862 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-31 01:57:21,973 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2023-08-31 01:57:21,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:57:21,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-31 01:57:21,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:57:22,340 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:57:22,340 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:57:23,717 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:57:23,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1043911410] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:57:23,717 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:57:23,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2023-08-31 01:57:23,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384791432] [2023-08-31 01:57:23,718 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:57:23,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-31 01:57:23,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:57:23,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-31 01:57:23,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=471, Unknown=0, NotChecked=0, Total=600 [2023-08-31 01:57:23,866 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 188 [2023-08-31 01:57:23,867 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 422 transitions, 5858 flow. Second operand has 25 states, 25 states have (on average 81.88) internal successors, (2047), 25 states have internal predecessors, (2047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:57:23,868 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:57:23,868 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 188 [2023-08-31 01:57:23,868 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:57:30,038 INFO L130 PetriNetUnfolder]: 5581/8996 cut-off events. [2023-08-31 01:57:30,038 INFO L131 PetriNetUnfolder]: For 148695/148695 co-relation queries the response was YES. [2023-08-31 01:57:30,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55616 conditions, 8996 events. 5581/8996 cut-off events. For 148695/148695 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 54762 event pairs, 237 based on Foata normal form. 344/9340 useless extension candidates. Maximal degree in co-relation 55215. Up to 2614 conditions per place. [2023-08-31 01:57:30,112 INFO L137 encePairwiseOnDemand]: 179/188 looper letters, 437 selfloop transitions, 263 changer transitions 421/1121 dead transitions. [2023-08-31 01:57:30,112 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 1121 transitions, 16429 flow [2023-08-31 01:57:30,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2023-08-31 01:57:30,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2023-08-31 01:57:30,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 8124 transitions. [2023-08-31 01:57:30,120 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45487122060470325 [2023-08-31 01:57:30,121 INFO L72 ComplementDD]: Start complementDD. Operand 95 states and 8124 transitions. [2023-08-31 01:57:30,121 INFO L73 IsDeterministic]: Start isDeterministic. Operand 95 states and 8124 transitions. [2023-08-31 01:57:30,123 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:57:30,123 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 95 states and 8124 transitions. [2023-08-31 01:57:30,132 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 96 states, 95 states have (on average 85.51578947368421) internal successors, (8124), 95 states have internal predecessors, (8124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:57:30,144 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 96 states, 96 states have (on average 188.0) internal successors, (18048), 96 states have internal predecessors, (18048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:57:30,146 INFO L81 ComplementDD]: Finished complementDD. Result has 96 states, 96 states have (on average 188.0) internal successors, (18048), 96 states have internal predecessors, (18048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:57:30,146 INFO L175 Difference]: Start difference. First operand has 275 places, 422 transitions, 5858 flow. Second operand 95 states and 8124 transitions. [2023-08-31 01:57:30,146 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 335 places, 1121 transitions, 16429 flow [2023-08-31 01:57:31,065 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 1121 transitions, 14493 flow, removed 782 selfloop flow, removed 43 redundant places. [2023-08-31 01:57:31,076 INFO L231 Difference]: Finished difference. Result has 352 places, 486 transitions, 7078 flow [2023-08-31 01:57:31,076 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=188, PETRI_DIFFERENCE_MINUEND_FLOW=4988, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=422, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=184, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=95, PETRI_FLOW=7078, PETRI_PLACES=352, PETRI_TRANSITIONS=486} [2023-08-31 01:57:31,076 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 322 predicate places. [2023-08-31 01:57:31,077 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 486 transitions, 7078 flow [2023-08-31 01:57:31,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 81.88) internal successors, (2047), 25 states have internal predecessors, (2047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:57:31,077 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:57:31,077 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:57:31,083 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-31 01:57:31,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-08-31 01:57:31,279 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 01:57:31,279 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:57:31,279 INFO L85 PathProgramCache]: Analyzing trace with hash 1657231966, now seen corresponding path program 7 times [2023-08-31 01:57:31,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:57:31,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185090172] [2023-08-31 01:57:31,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:57:31,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:57:31,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:57:31,782 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:57:31,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:57:31,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185090172] [2023-08-31 01:57:31,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185090172] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:57:31,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542452525] [2023-08-31 01:57:31,783 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-31 01:57:31,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:57:31,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:57:31,784 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:57:31,795 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-31 01:57:31,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:57:31,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-31 01:57:31,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:57:32,194 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:57:32,194 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:57:33,153 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:57:33,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [542452525] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:57:33,153 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:57:33,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2023-08-31 01:57:33,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028707814] [2023-08-31 01:57:33,154 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:57:33,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-31 01:57:33,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:57:33,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-31 01:57:33,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=472, Unknown=0, NotChecked=0, Total=600 [2023-08-31 01:57:33,274 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 188 [2023-08-31 01:57:33,275 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 486 transitions, 7078 flow. Second operand has 25 states, 25 states have (on average 84.2) internal successors, (2105), 25 states have internal predecessors, (2105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:57:33,275 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:57:33,275 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 188 [2023-08-31 01:57:33,275 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:57:37,474 INFO L130 PetriNetUnfolder]: 4047/7267 cut-off events. [2023-08-31 01:57:37,474 INFO L131 PetriNetUnfolder]: For 495484/496052 co-relation queries the response was YES. [2023-08-31 01:57:37,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65705 conditions, 7267 events. 4047/7267 cut-off events. For 495484/496052 co-relation queries the response was YES. Maximal size of possible extension queue 356. Compared 50528 event pairs, 140 based on Foata normal form. 304/7504 useless extension candidates. Maximal degree in co-relation 65523. Up to 1897 conditions per place. [2023-08-31 01:57:37,550 INFO L137 encePairwiseOnDemand]: 181/188 looper letters, 435 selfloop transitions, 256 changer transitions 266/975 dead transitions. [2023-08-31 01:57:37,550 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 975 transitions, 17064 flow [2023-08-31 01:57:37,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2023-08-31 01:57:37,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2023-08-31 01:57:37,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 5530 transitions. [2023-08-31 01:57:37,556 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4744337680164722 [2023-08-31 01:57:37,556 INFO L72 ComplementDD]: Start complementDD. Operand 62 states and 5530 transitions. [2023-08-31 01:57:37,556 INFO L73 IsDeterministic]: Start isDeterministic. Operand 62 states and 5530 transitions. [2023-08-31 01:57:37,558 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:57:37,558 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 62 states and 5530 transitions. [2023-08-31 01:57:37,604 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 63 states, 62 states have (on average 89.19354838709677) internal successors, (5530), 62 states have internal predecessors, (5530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:57:37,616 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 63 states, 63 states have (on average 188.0) internal successors, (11844), 63 states have internal predecessors, (11844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:57:37,618 INFO L81 ComplementDD]: Finished complementDD. Result has 63 states, 63 states have (on average 188.0) internal successors, (11844), 63 states have internal predecessors, (11844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:57:37,618 INFO L175 Difference]: Start difference. First operand has 352 places, 486 transitions, 7078 flow. Second operand 62 states and 5530 transitions. [2023-08-31 01:57:37,618 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 975 transitions, 17064 flow [2023-08-31 01:57:38,785 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 975 transitions, 13392 flow, removed 1651 selfloop flow, removed 68 redundant places. [2023-08-31 01:57:38,794 INFO L231 Difference]: Finished difference. Result has 308 places, 542 transitions, 8162 flow [2023-08-31 01:57:38,795 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=188, PETRI_DIFFERENCE_MINUEND_FLOW=6248, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=486, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=187, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=279, PETRI_DIFFERENCE_SUBTRAHEND_STATES=62, PETRI_FLOW=8162, PETRI_PLACES=308, PETRI_TRANSITIONS=542} [2023-08-31 01:57:38,795 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 278 predicate places. [2023-08-31 01:57:38,795 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 542 transitions, 8162 flow [2023-08-31 01:57:38,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 84.2) internal successors, (2105), 25 states have internal predecessors, (2105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:57:38,796 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:57:38,796 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:57:38,802 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-08-31 01:57:39,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-08-31 01:57:39,002 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 01:57:39,003 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:57:39,003 INFO L85 PathProgramCache]: Analyzing trace with hash -464045331, now seen corresponding path program 8 times [2023-08-31 01:57:39,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:57:39,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7256683] [2023-08-31 01:57:39,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:57:39,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:57:39,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:57:39,486 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:57:39,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:57:39,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7256683] [2023-08-31 01:57:39,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7256683] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:57:39,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461819460] [2023-08-31 01:57:39,487 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 01:57:39,487 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:57:39,487 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:57:39,489 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:57:39,516 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-31 01:57:39,603 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 01:57:39,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:57:39,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-31 01:57:39,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:57:39,956 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:57:39,956 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:57:41,097 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:57:41,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [461819460] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:57:41,098 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:57:41,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2023-08-31 01:57:41,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322944888] [2023-08-31 01:57:41,098 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:57:41,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-31 01:57:41,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:57:41,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-31 01:57:41,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=475, Unknown=0, NotChecked=0, Total=600 [2023-08-31 01:57:41,231 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 188 [2023-08-31 01:57:41,232 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 542 transitions, 8162 flow. Second operand has 25 states, 25 states have (on average 82.04) internal successors, (2051), 25 states have internal predecessors, (2051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:57:41,233 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:57:41,233 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 188 [2023-08-31 01:57:41,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:57:46,917 INFO L130 PetriNetUnfolder]: 6689/10816 cut-off events. [2023-08-31 01:57:46,917 INFO L131 PetriNetUnfolder]: For 165963/165963 co-relation queries the response was YES. [2023-08-31 01:57:46,977 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70139 conditions, 10816 events. 6689/10816 cut-off events. For 165963/165963 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 68219 event pairs, 507 based on Foata normal form. 178/10994 useless extension candidates. Maximal degree in co-relation 69928. Up to 4582 conditions per place. [2023-08-31 01:57:47,015 INFO L137 encePairwiseOnDemand]: 179/188 looper letters, 593 selfloop transitions, 292 changer transitions 232/1117 dead transitions. [2023-08-31 01:57:47,015 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 361 places, 1117 transitions, 17800 flow [2023-08-31 01:57:47,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2023-08-31 01:57:47,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2023-08-31 01:57:47,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 6800 transitions. [2023-08-31 01:57:47,023 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45785079450579047 [2023-08-31 01:57:47,023 INFO L72 ComplementDD]: Start complementDD. Operand 79 states and 6800 transitions. [2023-08-31 01:57:47,023 INFO L73 IsDeterministic]: Start isDeterministic. Operand 79 states and 6800 transitions. [2023-08-31 01:57:47,025 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:57:47,026 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 79 states and 6800 transitions. [2023-08-31 01:57:47,034 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 80 states, 79 states have (on average 86.07594936708861) internal successors, (6800), 79 states have internal predecessors, (6800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:57:47,050 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 80 states, 80 states have (on average 188.0) internal successors, (15040), 80 states have internal predecessors, (15040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:57:47,051 INFO L81 ComplementDD]: Finished complementDD. Result has 80 states, 80 states have (on average 188.0) internal successors, (15040), 80 states have internal predecessors, (15040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:57:47,051 INFO L175 Difference]: Start difference. First operand has 308 places, 542 transitions, 8162 flow. Second operand 79 states and 6800 transitions. [2023-08-31 01:57:47,051 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 361 places, 1117 transitions, 17800 flow [2023-08-31 01:57:48,341 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 1117 transitions, 16890 flow, removed 399 selfloop flow, removed 32 redundant places. [2023-08-31 01:57:48,355 INFO L231 Difference]: Finished difference. Result has 375 places, 648 transitions, 10710 flow [2023-08-31 01:57:48,356 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=188, PETRI_DIFFERENCE_MINUEND_FLOW=7658, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=542, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=196, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=328, PETRI_DIFFERENCE_SUBTRAHEND_STATES=79, PETRI_FLOW=10710, PETRI_PLACES=375, PETRI_TRANSITIONS=648} [2023-08-31 01:57:48,356 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 345 predicate places. [2023-08-31 01:57:48,356 INFO L495 AbstractCegarLoop]: Abstraction has has 375 places, 648 transitions, 10710 flow [2023-08-31 01:57:48,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 82.04) internal successors, (2051), 25 states have internal predecessors, (2051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:57:48,357 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:57:48,357 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:57:48,361 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-08-31 01:57:48,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-08-31 01:57:48,557 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 01:57:48,558 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:57:48,558 INFO L85 PathProgramCache]: Analyzing trace with hash -784792479, now seen corresponding path program 9 times [2023-08-31 01:57:48,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:57:48,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849851329] [2023-08-31 01:57:48,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:57:48,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:57:48,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:57:49,041 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:57:49,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:57:49,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849851329] [2023-08-31 01:57:49,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849851329] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:57:49,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868577850] [2023-08-31 01:57:49,042 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 01:57:49,042 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:57:49,042 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:57:49,045 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:57:49,070 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-31 01:57:49,191 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-08-31 01:57:49,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:57:49,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-31 01:57:49,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:57:49,518 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:57:49,518 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:57:50,489 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:57:50,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1868577850] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:57:50,490 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:57:50,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2023-08-31 01:57:50,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319988673] [2023-08-31 01:57:50,490 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:57:50,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-31 01:57:50,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:57:50,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-31 01:57:50,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=475, Unknown=0, NotChecked=0, Total=600 [2023-08-31 01:57:50,657 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 188 [2023-08-31 01:57:50,658 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 375 places, 648 transitions, 10710 flow. Second operand has 25 states, 25 states have (on average 82.04) internal successors, (2051), 25 states have internal predecessors, (2051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:57:50,658 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:57:50,658 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 188 [2023-08-31 01:57:50,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:57:57,086 INFO L130 PetriNetUnfolder]: 7402/11955 cut-off events. [2023-08-31 01:57:57,086 INFO L131 PetriNetUnfolder]: For 473424/473424 co-relation queries the response was YES. [2023-08-31 01:57:57,170 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94762 conditions, 11955 events. 7402/11955 cut-off events. For 473424/473424 co-relation queries the response was YES. Maximal size of possible extension queue 468. Compared 76607 event pairs, 565 based on Foata normal form. 200/12155 useless extension candidates. Maximal degree in co-relation 94584. Up to 5156 conditions per place. [2023-08-31 01:57:57,211 INFO L137 encePairwiseOnDemand]: 179/188 looper letters, 621 selfloop transitions, 286 changer transitions 285/1192 dead transitions. [2023-08-31 01:57:57,211 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 421 places, 1192 transitions, 22495 flow [2023-08-31 01:57:57,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2023-08-31 01:57:57,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2023-08-31 01:57:57,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 7291 transitions. [2023-08-31 01:57:57,216 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45625782227784734 [2023-08-31 01:57:57,216 INFO L72 ComplementDD]: Start complementDD. Operand 85 states and 7291 transitions. [2023-08-31 01:57:57,216 INFO L73 IsDeterministic]: Start isDeterministic. Operand 85 states and 7291 transitions. [2023-08-31 01:57:57,218 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:57:57,218 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 85 states and 7291 transitions. [2023-08-31 01:57:57,226 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 86 states, 85 states have (on average 85.7764705882353) internal successors, (7291), 85 states have internal predecessors, (7291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:57:57,235 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 86 states, 86 states have (on average 188.0) internal successors, (16168), 86 states have internal predecessors, (16168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:57:57,236 INFO L81 ComplementDD]: Finished complementDD. Result has 86 states, 86 states have (on average 188.0) internal successors, (16168), 86 states have internal predecessors, (16168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:57:57,237 INFO L175 Difference]: Start difference. First operand has 375 places, 648 transitions, 10710 flow. Second operand 85 states and 7291 transitions. [2023-08-31 01:57:57,237 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 421 places, 1192 transitions, 22495 flow [2023-08-31 01:57:59,680 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 375 places, 1192 transitions, 19754 flow, removed 1331 selfloop flow, removed 46 redundant places. [2023-08-31 01:57:59,693 INFO L231 Difference]: Finished difference. Result has 425 places, 704 transitions, 12120 flow [2023-08-31 01:57:59,694 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=188, PETRI_DIFFERENCE_MINUEND_FLOW=9985, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=648, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=225, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=419, PETRI_DIFFERENCE_SUBTRAHEND_STATES=85, PETRI_FLOW=12120, PETRI_PLACES=425, PETRI_TRANSITIONS=704} [2023-08-31 01:57:59,694 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 395 predicate places. [2023-08-31 01:57:59,694 INFO L495 AbstractCegarLoop]: Abstraction has has 425 places, 704 transitions, 12120 flow [2023-08-31 01:57:59,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 82.04) internal successors, (2051), 25 states have internal predecessors, (2051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:57:59,695 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:57:59,695 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:57:59,703 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-08-31 01:57:59,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-08-31 01:57:59,901 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 01:57:59,901 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:57:59,901 INFO L85 PathProgramCache]: Analyzing trace with hash 2122151057, now seen corresponding path program 10 times [2023-08-31 01:57:59,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:57:59,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794668741] [2023-08-31 01:57:59,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:57:59,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:57:59,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:58:00,324 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:58:00,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:58:00,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794668741] [2023-08-31 01:58:00,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794668741] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:58:00,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862370831] [2023-08-31 01:58:00,325 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-31 01:58:00,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:58:00,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:58:00,329 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:58:00,354 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-08-31 01:58:00,432 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-31 01:58:00,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:58:00,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-31 01:58:00,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:58:00,845 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:58:00,845 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:58:02,077 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:58:02,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [862370831] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:58:02,077 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:58:02,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2023-08-31 01:58:02,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071028567] [2023-08-31 01:58:02,077 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:58:02,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-31 01:58:02,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:58:02,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-31 01:58:02,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=469, Unknown=0, NotChecked=0, Total=600 [2023-08-31 01:58:02,203 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 188 [2023-08-31 01:58:02,204 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 425 places, 704 transitions, 12120 flow. Second operand has 25 states, 25 states have (on average 84.44) internal successors, (2111), 25 states have internal predecessors, (2111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:58:02,204 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:58:02,204 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 188 [2023-08-31 01:58:02,204 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:58:07,600 INFO L130 PetriNetUnfolder]: 5407/9581 cut-off events. [2023-08-31 01:58:07,600 INFO L131 PetriNetUnfolder]: For 767021/768833 co-relation queries the response was YES. [2023-08-31 01:58:07,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100214 conditions, 9581 events. 5407/9581 cut-off events. For 767021/768833 co-relation queries the response was YES. Maximal size of possible extension queue 447. Compared 69868 event pairs, 214 based on Foata normal form. 553/9937 useless extension candidates. Maximal degree in co-relation 100061. Up to 2863 conditions per place. [2023-08-31 01:58:07,811 INFO L137 encePairwiseOnDemand]: 181/188 looper letters, 567 selfloop transitions, 323 changer transitions 273/1193 dead transitions. [2023-08-31 01:58:07,812 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 436 places, 1193 transitions, 24655 flow [2023-08-31 01:58:07,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2023-08-31 01:58:07,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2023-08-31 01:58:07,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 5650 transitions. [2023-08-31 01:58:07,817 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4695811170212766 [2023-08-31 01:58:07,817 INFO L72 ComplementDD]: Start complementDD. Operand 64 states and 5650 transitions. [2023-08-31 01:58:07,817 INFO L73 IsDeterministic]: Start isDeterministic. Operand 64 states and 5650 transitions. [2023-08-31 01:58:07,818 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:58:07,818 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 64 states and 5650 transitions. [2023-08-31 01:58:07,825 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 65 states, 64 states have (on average 88.28125) internal successors, (5650), 64 states have internal predecessors, (5650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:58:07,833 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 65 states, 65 states have (on average 188.0) internal successors, (12220), 65 states have internal predecessors, (12220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:58:07,834 INFO L81 ComplementDD]: Finished complementDD. Result has 65 states, 65 states have (on average 188.0) internal successors, (12220), 65 states have internal predecessors, (12220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:58:07,834 INFO L175 Difference]: Start difference. First operand has 425 places, 704 transitions, 12120 flow. Second operand 64 states and 5650 transitions. [2023-08-31 01:58:07,835 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 436 places, 1193 transitions, 24655 flow [2023-08-31 01:58:10,373 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 1193 transitions, 20055 flow, removed 2093 selfloop flow, removed 66 redundant places. [2023-08-31 01:58:10,388 INFO L231 Difference]: Finished difference. Result has 396 places, 758 transitions, 13330 flow [2023-08-31 01:58:10,389 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=188, PETRI_DIFFERENCE_MINUEND_FLOW=11118, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=704, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=247, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=431, PETRI_DIFFERENCE_SUBTRAHEND_STATES=64, PETRI_FLOW=13330, PETRI_PLACES=396, PETRI_TRANSITIONS=758} [2023-08-31 01:58:10,389 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 366 predicate places. [2023-08-31 01:58:10,389 INFO L495 AbstractCegarLoop]: Abstraction has has 396 places, 758 transitions, 13330 flow [2023-08-31 01:58:10,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 84.44) internal successors, (2111), 25 states have internal predecessors, (2111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:58:10,390 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:58:10,390 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:58:10,397 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-08-31 01:58:10,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:58:10,598 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 01:58:10,598 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:58:10,598 INFO L85 PathProgramCache]: Analyzing trace with hash 1978207091, now seen corresponding path program 11 times [2023-08-31 01:58:10,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:58:10,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205329814] [2023-08-31 01:58:10,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:58:10,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:58:10,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:58:11,009 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:58:11,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:58:11,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205329814] [2023-08-31 01:58:11,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205329814] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:58:11,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984935257] [2023-08-31 01:58:11,010 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-31 01:58:11,010 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:58:11,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:58:11,013 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:58:11,038 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-08-31 01:58:11,117 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2023-08-31 01:58:11,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:58:11,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-31 01:58:11,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:58:11,579 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:58:11,580 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:58:12,653 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:58:12,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [984935257] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:58:12,653 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:58:12,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2023-08-31 01:58:12,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749879865] [2023-08-31 01:58:12,654 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:58:12,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-31 01:58:12,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:58:12,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-31 01:58:12,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=468, Unknown=0, NotChecked=0, Total=600 [2023-08-31 01:58:12,813 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 188 [2023-08-31 01:58:12,814 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 396 places, 758 transitions, 13330 flow. Second operand has 25 states, 25 states have (on average 84.56) internal successors, (2114), 25 states have internal predecessors, (2114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:58:12,814 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:58:12,814 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 188 [2023-08-31 01:58:12,814 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:58:17,838 INFO L130 PetriNetUnfolder]: 5815/10433 cut-off events. [2023-08-31 01:58:17,838 INFO L131 PetriNetUnfolder]: For 274125/274789 co-relation queries the response was YES. [2023-08-31 01:58:17,902 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83319 conditions, 10433 events. 5815/10433 cut-off events. For 274125/274789 co-relation queries the response was YES. Maximal size of possible extension queue 480. Compared 76952 event pairs, 424 based on Foata normal form. 386/10714 useless extension candidates. Maximal degree in co-relation 83193. Up to 3384 conditions per place. [2023-08-31 01:58:17,939 INFO L137 encePairwiseOnDemand]: 181/188 looper letters, 692 selfloop transitions, 314 changer transitions 236/1264 dead transitions. [2023-08-31 01:58:17,939 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 429 places, 1264 transitions, 23654 flow [2023-08-31 01:58:17,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2023-08-31 01:58:17,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2023-08-31 01:58:17,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 5712 transitions. [2023-08-31 01:58:17,944 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4747340425531915 [2023-08-31 01:58:17,944 INFO L72 ComplementDD]: Start complementDD. Operand 64 states and 5712 transitions. [2023-08-31 01:58:17,944 INFO L73 IsDeterministic]: Start isDeterministic. Operand 64 states and 5712 transitions. [2023-08-31 01:58:17,945 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:58:17,945 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 64 states and 5712 transitions. [2023-08-31 01:58:17,951 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 65 states, 64 states have (on average 89.25) internal successors, (5712), 64 states have internal predecessors, (5712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:58:17,959 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 65 states, 65 states have (on average 188.0) internal successors, (12220), 65 states have internal predecessors, (12220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:58:17,959 INFO L81 ComplementDD]: Finished complementDD. Result has 65 states, 65 states have (on average 188.0) internal successors, (12220), 65 states have internal predecessors, (12220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:58:17,960 INFO L175 Difference]: Start difference. First operand has 396 places, 758 transitions, 13330 flow. Second operand 64 states and 5712 transitions. [2023-08-31 01:58:17,960 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 429 places, 1264 transitions, 23654 flow [2023-08-31 01:58:20,251 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 394 places, 1264 transitions, 22031 flow, removed 755 selfloop flow, removed 35 redundant places. [2023-08-31 01:58:20,266 INFO L231 Difference]: Finished difference. Result has 412 places, 836 transitions, 15233 flow [2023-08-31 01:58:20,266 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=188, PETRI_DIFFERENCE_MINUEND_FLOW=12492, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=758, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=228, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=518, PETRI_DIFFERENCE_SUBTRAHEND_STATES=64, PETRI_FLOW=15233, PETRI_PLACES=412, PETRI_TRANSITIONS=836} [2023-08-31 01:58:20,266 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 382 predicate places. [2023-08-31 01:58:20,267 INFO L495 AbstractCegarLoop]: Abstraction has has 412 places, 836 transitions, 15233 flow [2023-08-31 01:58:20,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 84.56) internal successors, (2114), 25 states have internal predecessors, (2114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:58:20,267 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:58:20,267 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:58:20,274 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-08-31 01:58:20,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-08-31 01:58:20,468 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 01:58:20,468 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:58:20,468 INFO L85 PathProgramCache]: Analyzing trace with hash -535611417, now seen corresponding path program 12 times [2023-08-31 01:58:20,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:58:20,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50543870] [2023-08-31 01:58:20,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:58:20,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:58:20,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:58:21,037 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:58:21,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:58:21,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50543870] [2023-08-31 01:58:21,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50543870] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:58:21,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409564492] [2023-08-31 01:58:21,037 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-31 01:58:21,037 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:58:21,038 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:58:21,038 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:58:21,040 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-08-31 01:58:21,146 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2023-08-31 01:58:21,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:58:21,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-31 01:58:21,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:58:21,607 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:58:21,607 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:58:23,107 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:58:23,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [409564492] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:58:23,107 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:58:23,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 26 [2023-08-31 01:58:23,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155274259] [2023-08-31 01:58:23,108 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:58:23,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-31 01:58:23,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:58:23,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-31 01:58:23,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=553, Unknown=0, NotChecked=0, Total=702 [2023-08-31 01:58:23,237 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 188 [2023-08-31 01:58:23,238 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 412 places, 836 transitions, 15233 flow. Second operand has 27 states, 27 states have (on average 84.25925925925925) internal successors, (2275), 27 states have internal predecessors, (2275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:58:23,238 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:58:23,238 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 188 [2023-08-31 01:58:23,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:58:30,952 INFO L130 PetriNetUnfolder]: 7392/13284 cut-off events. [2023-08-31 01:58:30,952 INFO L131 PetriNetUnfolder]: For 383744/384585 co-relation queries the response was YES. [2023-08-31 01:58:31,037 INFO L83 FinitePrefix]: Finished finitePrefix Result has 112165 conditions, 13284 events. 7392/13284 cut-off events. For 383744/384585 co-relation queries the response was YES. Maximal size of possible extension queue 663. Compared 102230 event pairs, 264 based on Foata normal form. 481/13615 useless extension candidates. Maximal degree in co-relation 111956. Up to 2966 conditions per place. [2023-08-31 01:58:31,088 INFO L137 encePairwiseOnDemand]: 181/188 looper letters, 747 selfloop transitions, 552 changer transitions 389/1710 dead transitions. [2023-08-31 01:58:31,088 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 487 places, 1710 transitions, 32131 flow [2023-08-31 01:58:31,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2023-08-31 01:58:31,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2023-08-31 01:58:31,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 8662 transitions. [2023-08-31 01:58:31,094 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4749945163413029 [2023-08-31 01:58:31,094 INFO L72 ComplementDD]: Start complementDD. Operand 97 states and 8662 transitions. [2023-08-31 01:58:31,094 INFO L73 IsDeterministic]: Start isDeterministic. Operand 97 states and 8662 transitions. [2023-08-31 01:58:31,096 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:58:31,096 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 97 states and 8662 transitions. [2023-08-31 01:58:31,104 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 98 states, 97 states have (on average 89.29896907216495) internal successors, (8662), 97 states have internal predecessors, (8662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:58:31,115 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 98 states, 98 states have (on average 188.0) internal successors, (18424), 98 states have internal predecessors, (18424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:58:31,116 INFO L81 ComplementDD]: Finished complementDD. Result has 98 states, 98 states have (on average 188.0) internal successors, (18424), 98 states have internal predecessors, (18424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:58:31,116 INFO L175 Difference]: Start difference. First operand has 412 places, 836 transitions, 15233 flow. Second operand 97 states and 8662 transitions. [2023-08-31 01:58:31,116 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 487 places, 1710 transitions, 32131 flow [2023-08-31 01:58:34,116 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 458 places, 1710 transitions, 30260 flow, removed 759 selfloop flow, removed 29 redundant places. [2023-08-31 01:58:34,140 INFO L231 Difference]: Finished difference. Result has 486 places, 1010 transitions, 19858 flow [2023-08-31 01:58:34,140 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=188, PETRI_DIFFERENCE_MINUEND_FLOW=14042, PETRI_DIFFERENCE_MINUEND_PLACES=362, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=836, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=372, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=424, PETRI_DIFFERENCE_SUBTRAHEND_STATES=97, PETRI_FLOW=19858, PETRI_PLACES=486, PETRI_TRANSITIONS=1010} [2023-08-31 01:58:34,141 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 456 predicate places. [2023-08-31 01:58:34,141 INFO L495 AbstractCegarLoop]: Abstraction has has 486 places, 1010 transitions, 19858 flow [2023-08-31 01:58:34,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 84.25925925925925) internal successors, (2275), 27 states have internal predecessors, (2275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:58:34,141 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:58:34,141 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:58:34,146 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-08-31 01:58:34,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:58:34,342 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 01:58:34,342 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:58:34,342 INFO L85 PathProgramCache]: Analyzing trace with hash -858648437, now seen corresponding path program 13 times [2023-08-31 01:58:34,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:58:34,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838327356] [2023-08-31 01:58:34,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:58:34,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:58:34,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:58:34,843 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:58:34,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:58:34,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838327356] [2023-08-31 01:58:34,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838327356] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:58:34,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626404754] [2023-08-31 01:58:34,844 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-31 01:58:34,845 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:58:34,845 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:58:34,849 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:58:34,851 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-08-31 01:58:34,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:58:34,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-31 01:58:34,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:58:35,422 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:58:35,422 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:58:37,313 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:58:37,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [626404754] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:58:37,314 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:58:37,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 26 [2023-08-31 01:58:37,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896316771] [2023-08-31 01:58:37,314 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:58:37,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-31 01:58:37,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:58:37,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-31 01:58:37,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=563, Unknown=0, NotChecked=0, Total=702 [2023-08-31 01:58:37,457 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 188 [2023-08-31 01:58:37,458 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 486 places, 1010 transitions, 19858 flow. Second operand has 27 states, 27 states have (on average 84.25925925925925) internal successors, (2275), 27 states have internal predecessors, (2275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:58:37,458 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:58:37,458 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 188 [2023-08-31 01:58:37,458 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:58:46,981 INFO L130 PetriNetUnfolder]: 7897/14059 cut-off events. [2023-08-31 01:58:46,981 INFO L131 PetriNetUnfolder]: For 489922/491033 co-relation queries the response was YES. [2023-08-31 01:58:47,075 INFO L83 FinitePrefix]: Finished finitePrefix Result has 128980 conditions, 14059 events. 7897/14059 cut-off events. For 489922/491033 co-relation queries the response was YES. Maximal size of possible extension queue 756. Compared 108669 event pairs, 536 based on Foata normal form. 677/14533 useless extension candidates. Maximal degree in co-relation 128852. Up to 4328 conditions per place. [2023-08-31 01:58:47,131 INFO L137 encePairwiseOnDemand]: 181/188 looper letters, 890 selfloop transitions, 483 changer transitions 250/1673 dead transitions. [2023-08-31 01:58:47,132 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 537 places, 1673 transitions, 36054 flow [2023-08-31 01:58:47,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2023-08-31 01:58:47,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2023-08-31 01:58:47,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 7335 transitions. [2023-08-31 01:58:47,136 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4700717764675724 [2023-08-31 01:58:47,136 INFO L72 ComplementDD]: Start complementDD. Operand 83 states and 7335 transitions. [2023-08-31 01:58:47,136 INFO L73 IsDeterministic]: Start isDeterministic. Operand 83 states and 7335 transitions. [2023-08-31 01:58:47,137 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:58:47,137 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 83 states and 7335 transitions. [2023-08-31 01:58:47,142 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 84 states, 83 states have (on average 88.37349397590361) internal successors, (7335), 83 states have internal predecessors, (7335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:58:47,147 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 84 states, 84 states have (on average 188.0) internal successors, (15792), 84 states have internal predecessors, (15792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:58:47,148 INFO L81 ComplementDD]: Finished complementDD. Result has 84 states, 84 states have (on average 188.0) internal successors, (15792), 84 states have internal predecessors, (15792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:58:47,148 INFO L175 Difference]: Start difference. First operand has 486 places, 1010 transitions, 19858 flow. Second operand 83 states and 7335 transitions. [2023-08-31 01:58:47,148 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 537 places, 1673 transitions, 36054 flow [2023-08-31 01:58:52,523 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 490 places, 1673 transitions, 32179 flow, removed 1862 selfloop flow, removed 47 redundant places. [2023-08-31 01:58:52,544 INFO L231 Difference]: Finished difference. Result has 522 places, 1182 transitions, 24013 flow [2023-08-31 01:58:52,545 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=188, PETRI_DIFFERENCE_MINUEND_FLOW=18289, PETRI_DIFFERENCE_MINUEND_PLACES=408, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1010, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=316, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=650, PETRI_DIFFERENCE_SUBTRAHEND_STATES=83, PETRI_FLOW=24013, PETRI_PLACES=522, PETRI_TRANSITIONS=1182} [2023-08-31 01:58:52,545 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 492 predicate places. [2023-08-31 01:58:52,546 INFO L495 AbstractCegarLoop]: Abstraction has has 522 places, 1182 transitions, 24013 flow [2023-08-31 01:58:52,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 84.25925925925925) internal successors, (2275), 27 states have internal predecessors, (2275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:58:52,546 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:58:52,546 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:58:52,553 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-08-31 01:58:52,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:58:52,751 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 01:58:52,752 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:58:52,752 INFO L85 PathProgramCache]: Analyzing trace with hash -815196267, now seen corresponding path program 14 times [2023-08-31 01:58:52,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:58:52,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001829723] [2023-08-31 01:58:52,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:58:52,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:58:52,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:58:53,363 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:58:53,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:58:53,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001829723] [2023-08-31 01:58:53,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001829723] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:58:53,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182880787] [2023-08-31 01:58:53,364 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 01:58:53,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:58:53,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:58:53,365 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:58:53,366 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-08-31 01:58:53,463 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 01:58:53,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:58:53,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-31 01:58:53,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:58:53,974 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:58:53,974 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:58:55,897 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:58:55,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1182880787] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:58:55,897 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:58:55,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 29 [2023-08-31 01:58:55,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408996081] [2023-08-31 01:58:55,898 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:58:55,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-31 01:58:55,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:58:55,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-31 01:58:55,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=691, Unknown=0, NotChecked=0, Total=870 [2023-08-31 01:58:56,039 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 188 [2023-08-31 01:58:56,040 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 522 places, 1182 transitions, 24013 flow. Second operand has 30 states, 30 states have (on average 83.96666666666667) internal successors, (2519), 30 states have internal predecessors, (2519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:58:56,040 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:58:56,040 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 188 [2023-08-31 01:58:56,040 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:59:09,387 INFO L130 PetriNetUnfolder]: 9716/17394 cut-off events. [2023-08-31 01:59:09,387 INFO L131 PetriNetUnfolder]: For 616003/617340 co-relation queries the response was YES. [2023-08-31 01:59:09,511 INFO L83 FinitePrefix]: Finished finitePrefix Result has 156781 conditions, 17394 events. 9716/17394 cut-off events. For 616003/617340 co-relation queries the response was YES. Maximal size of possible extension queue 980. Compared 141515 event pairs, 346 based on Foata normal form. 853/17998 useless extension candidates. Maximal degree in co-relation 156619. Up to 4308 conditions per place. [2023-08-31 01:59:09,578 INFO L137 encePairwiseOnDemand]: 181/188 looper letters, 949 selfloop transitions, 724 changer transitions 431/2154 dead transitions. [2023-08-31 01:59:09,578 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 611 places, 2154 transitions, 45324 flow [2023-08-31 01:59:09,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2023-08-31 01:59:09,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2023-08-31 01:59:09,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 10260 transitions. [2023-08-31 01:59:09,583 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47046955245781363 [2023-08-31 01:59:09,583 INFO L72 ComplementDD]: Start complementDD. Operand 116 states and 10260 transitions. [2023-08-31 01:59:09,583 INFO L73 IsDeterministic]: Start isDeterministic. Operand 116 states and 10260 transitions. [2023-08-31 01:59:09,585 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:59:09,585 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 116 states and 10260 transitions. [2023-08-31 01:59:09,593 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 117 states, 116 states have (on average 88.44827586206897) internal successors, (10260), 116 states have internal predecessors, (10260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:59:09,604 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 117 states, 117 states have (on average 188.0) internal successors, (21996), 117 states have internal predecessors, (21996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:59:09,606 INFO L81 ComplementDD]: Finished complementDD. Result has 117 states, 117 states have (on average 188.0) internal successors, (21996), 117 states have internal predecessors, (21996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:59:09,606 INFO L175 Difference]: Start difference. First operand has 522 places, 1182 transitions, 24013 flow. Second operand 116 states and 10260 transitions. [2023-08-31 01:59:09,606 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 611 places, 2154 transitions, 45324 flow [2023-08-31 01:59:12,534 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 582 places, 2154 transitions, 43861 flow, removed 694 selfloop flow, removed 29 redundant places. [2023-08-31 01:59:12,564 INFO L231 Difference]: Finished difference. Result has 622 places, 1393 transitions, 30545 flow [2023-08-31 01:59:12,565 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=188, PETRI_DIFFERENCE_MINUEND_FLOW=22794, PETRI_DIFFERENCE_MINUEND_PLACES=467, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=502, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=640, PETRI_DIFFERENCE_SUBTRAHEND_STATES=116, PETRI_FLOW=30545, PETRI_PLACES=622, PETRI_TRANSITIONS=1393} [2023-08-31 01:59:12,565 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 592 predicate places. [2023-08-31 01:59:12,565 INFO L495 AbstractCegarLoop]: Abstraction has has 622 places, 1393 transitions, 30545 flow [2023-08-31 01:59:12,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 83.96666666666667) internal successors, (2519), 30 states have internal predecessors, (2519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:59:12,566 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:59:12,566 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:59:12,571 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-08-31 01:59:12,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:59:12,766 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 01:59:12,767 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:59:12,767 INFO L85 PathProgramCache]: Analyzing trace with hash 430765921, now seen corresponding path program 15 times [2023-08-31 01:59:12,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:59:12,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670569161] [2023-08-31 01:59:12,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:59:12,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:59:12,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:59:13,433 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:59:13,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:59:13,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670569161] [2023-08-31 01:59:13,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670569161] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:59:13,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430837323] [2023-08-31 01:59:13,434 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 01:59:13,434 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:59:13,434 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:59:13,435 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:59:13,436 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-08-31 01:59:13,548 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2023-08-31 01:59:13,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:59:13,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-31 01:59:13,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:59:14,258 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:59:14,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:59:16,365 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:59:16,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [430837323] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:59:16,366 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:59:16,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 29 [2023-08-31 01:59:16,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872573010] [2023-08-31 01:59:16,366 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:59:16,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-31 01:59:16,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:59:16,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-31 01:59:16,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=688, Unknown=0, NotChecked=0, Total=870 [2023-08-31 01:59:16,519 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 188 [2023-08-31 01:59:16,520 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 622 places, 1393 transitions, 30545 flow. Second operand has 30 states, 30 states have (on average 81.53333333333333) internal successors, (2446), 30 states have internal predecessors, (2446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:59:16,520 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:59:16,520 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 188 [2023-08-31 01:59:16,521 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:59:37,233 INFO L130 PetriNetUnfolder]: 16607/27004 cut-off events. [2023-08-31 01:59:37,233 INFO L131 PetriNetUnfolder]: For 1188496/1188496 co-relation queries the response was YES. [2023-08-31 01:59:37,507 INFO L83 FinitePrefix]: Finished finitePrefix Result has 238234 conditions, 27004 events. 16607/27004 cut-off events. For 1188496/1188496 co-relation queries the response was YES. Maximal size of possible extension queue 1038. Compared 197778 event pairs, 1085 based on Foata normal form. 432/27436 useless extension candidates. Maximal degree in co-relation 238002. Up to 9826 conditions per place. [2023-08-31 01:59:37,633 INFO L137 encePairwiseOnDemand]: 179/188 looper letters, 1314 selfloop transitions, 728 changer transitions 533/2575 dead transitions. [2023-08-31 01:59:37,633 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 723 places, 2575 transitions, 59306 flow [2023-08-31 01:59:37,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 151 states. [2023-08-31 01:59:37,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2023-08-31 01:59:37,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 12931 transitions. [2023-08-31 01:59:37,643 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45550937015640414 [2023-08-31 01:59:37,643 INFO L72 ComplementDD]: Start complementDD. Operand 151 states and 12931 transitions. [2023-08-31 01:59:37,643 INFO L73 IsDeterministic]: Start isDeterministic. Operand 151 states and 12931 transitions. [2023-08-31 01:59:37,646 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:59:37,646 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 151 states and 12931 transitions. [2023-08-31 01:59:37,659 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 152 states, 151 states have (on average 85.63576158940397) internal successors, (12931), 151 states have internal predecessors, (12931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:59:37,679 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 152 states, 152 states have (on average 188.0) internal successors, (28576), 152 states have internal predecessors, (28576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:59:37,682 INFO L81 ComplementDD]: Finished complementDD. Result has 152 states, 152 states have (on average 188.0) internal successors, (28576), 152 states have internal predecessors, (28576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:59:37,683 INFO L175 Difference]: Start difference. First operand has 622 places, 1393 transitions, 30545 flow. Second operand 151 states and 12931 transitions. [2023-08-31 01:59:37,683 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 723 places, 2575 transitions, 59306 flow [2023-08-31 01:59:44,222 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 674 places, 2575 transitions, 53108 flow, removed 2269 selfloop flow, removed 49 redundant places. [2023-08-31 01:59:44,259 INFO L231 Difference]: Finished difference. Result has 768 places, 1635 transitions, 36201 flow [2023-08-31 01:59:44,260 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=188, PETRI_DIFFERENCE_MINUEND_FLOW=27313, PETRI_DIFFERENCE_MINUEND_PLACES=524, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1393, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=512, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=837, PETRI_DIFFERENCE_SUBTRAHEND_STATES=151, PETRI_FLOW=36201, PETRI_PLACES=768, PETRI_TRANSITIONS=1635} [2023-08-31 01:59:44,260 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 738 predicate places. [2023-08-31 01:59:44,260 INFO L495 AbstractCegarLoop]: Abstraction has has 768 places, 1635 transitions, 36201 flow [2023-08-31 01:59:44,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 81.53333333333333) internal successors, (2446), 30 states have internal predecessors, (2446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:59:44,261 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:59:44,261 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 01:59:44,267 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-08-31 01:59:44,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:59:44,467 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 01:59:44,467 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:59:44,467 INFO L85 PathProgramCache]: Analyzing trace with hash -1299411541, now seen corresponding path program 16 times [2023-08-31 01:59:44,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:59:44,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640918266] [2023-08-31 01:59:44,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:59:44,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:59:44,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:59:45,110 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 9 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:59:45,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:59:45,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640918266] [2023-08-31 01:59:45,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640918266] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:59:45,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873831550] [2023-08-31 01:59:45,111 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-31 01:59:45,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:59:45,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:59:45,112 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 01:59:45,116 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-08-31 01:59:45,221 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-31 01:59:45,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 01:59:45,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-31 01:59:45,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:59:45,821 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 9 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:59:45,821 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:59:47,896 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 9 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:59:47,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [873831550] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:59:47,897 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:59:47,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 29 [2023-08-31 01:59:47,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750253324] [2023-08-31 01:59:47,897 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:59:47,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-31 01:59:47,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:59:47,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-31 01:59:47,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=694, Unknown=0, NotChecked=0, Total=870 [2023-08-31 01:59:48,086 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 188 [2023-08-31 01:59:48,087 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 768 places, 1635 transitions, 36201 flow. Second operand has 30 states, 30 states have (on average 83.9) internal successors, (2517), 30 states have internal predecessors, (2517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 01:59:48,087 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:59:48,087 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 188 [2023-08-31 01:59:48,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:00:07,861 INFO L130 PetriNetUnfolder]: 12954/23226 cut-off events. [2023-08-31 02:00:07,861 INFO L131 PetriNetUnfolder]: For 4575187/4578688 co-relation queries the response was YES. [2023-08-31 02:00:08,239 INFO L83 FinitePrefix]: Finished finitePrefix Result has 327468 conditions, 23226 events. 12954/23226 cut-off events. For 4575187/4578688 co-relation queries the response was YES. Maximal size of possible extension queue 1058. Compared 194912 event pairs, 532 based on Foata normal form. 963/23915 useless extension candidates. Maximal degree in co-relation 325855. Up to 5874 conditions per place. [2023-08-31 02:00:08,493 INFO L137 encePairwiseOnDemand]: 181/188 looper letters, 1292 selfloop transitions, 791 changer transitions 561/2704 dead transitions. [2023-08-31 02:00:08,494 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 808 places, 2704 transitions, 68816 flow [2023-08-31 02:00:08,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2023-08-31 02:00:08,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2023-08-31 02:00:08,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 10787 transitions. [2023-08-31 02:00:08,499 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47419553367329 [2023-08-31 02:00:08,499 INFO L72 ComplementDD]: Start complementDD. Operand 121 states and 10787 transitions. [2023-08-31 02:00:08,499 INFO L73 IsDeterministic]: Start isDeterministic. Operand 121 states and 10787 transitions. [2023-08-31 02:00:08,500 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:00:08,500 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 121 states and 10787 transitions. [2023-08-31 02:00:08,508 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 122 states, 121 states have (on average 89.14876033057851) internal successors, (10787), 121 states have internal predecessors, (10787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:00:08,521 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 122 states, 122 states have (on average 188.0) internal successors, (22936), 122 states have internal predecessors, (22936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:00:08,523 INFO L81 ComplementDD]: Finished complementDD. Result has 122 states, 122 states have (on average 188.0) internal successors, (22936), 122 states have internal predecessors, (22936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:00:08,523 INFO L175 Difference]: Start difference. First operand has 768 places, 1635 transitions, 36201 flow. Second operand 121 states and 10787 transitions. [2023-08-31 02:00:08,523 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 808 places, 2704 transitions, 68816 flow [2023-08-31 02:00:49,396 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 709 places, 2704 transitions, 58281 flow, removed 5224 selfloop flow, removed 99 redundant places. [2023-08-31 02:00:49,437 INFO L231 Difference]: Finished difference. Result has 760 places, 1826 transitions, 41852 flow [2023-08-31 02:00:49,438 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=188, PETRI_DIFFERENCE_MINUEND_FLOW=34148, PETRI_DIFFERENCE_MINUEND_PLACES=589, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1635, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=597, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=960, PETRI_DIFFERENCE_SUBTRAHEND_STATES=121, PETRI_FLOW=41852, PETRI_PLACES=760, PETRI_TRANSITIONS=1826} [2023-08-31 02:00:49,439 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 730 predicate places. [2023-08-31 02:00:49,439 INFO L495 AbstractCegarLoop]: Abstraction has has 760 places, 1826 transitions, 41852 flow [2023-08-31 02:00:49,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 83.9) internal successors, (2517), 30 states have internal predecessors, (2517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:00:49,439 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:00:49,440 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:00:49,449 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-08-31 02:00:49,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-08-31 02:00:49,646 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 02:00:49,646 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:00:49,646 INFO L85 PathProgramCache]: Analyzing trace with hash 807146657, now seen corresponding path program 17 times [2023-08-31 02:00:49,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:00:49,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867134564] [2023-08-31 02:00:49,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:00:49,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:00:49,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:00:50,543 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 3 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:00:50,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:00:50,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867134564] [2023-08-31 02:00:50,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867134564] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:00:50,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283384609] [2023-08-31 02:00:50,544 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-31 02:00:50,544 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:00:50,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:00:50,549 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 02:00:50,553 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-08-31 02:00:50,676 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2023-08-31 02:00:50,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 02:00:50,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-31 02:00:50,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:00:51,444 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 3 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:00:51,444 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:00:53,389 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 3 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:00:53,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1283384609] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:00:53,390 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:00:53,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 29 [2023-08-31 02:00:53,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568100061] [2023-08-31 02:00:53,390 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:00:53,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-31 02:00:53,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:00:53,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-31 02:00:53,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=691, Unknown=0, NotChecked=0, Total=870 [2023-08-31 02:00:53,573 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 188 [2023-08-31 02:00:53,574 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 760 places, 1826 transitions, 41852 flow. Second operand has 30 states, 30 states have (on average 84.16666666666667) internal successors, (2525), 30 states have internal predecessors, (2525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:00:53,574 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:00:53,574 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 188 [2023-08-31 02:00:53,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:01:12,892 INFO L130 PetriNetUnfolder]: 13659/24346 cut-off events. [2023-08-31 02:01:12,892 INFO L131 PetriNetUnfolder]: For 1792669/1794613 co-relation queries the response was YES. [2023-08-31 02:01:13,219 INFO L83 FinitePrefix]: Finished finitePrefix Result has 273373 conditions, 24346 events. 13659/24346 cut-off events. For 1792669/1794613 co-relation queries the response was YES. Maximal size of possible extension queue 1138. Compared 205465 event pairs, 504 based on Foata normal form. 1113/25086 useless extension candidates. Maximal degree in co-relation 273146. Up to 6345 conditions per place. [2023-08-31 02:01:13,325 INFO L137 encePairwiseOnDemand]: 181/188 looper letters, 1377 selfloop transitions, 921 changer transitions 481/2837 dead transitions. [2023-08-31 02:01:13,325 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 821 places, 2837 transitions, 70294 flow [2023-08-31 02:01:13,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2023-08-31 02:01:13,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2023-08-31 02:01:13,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 10261 transitions. [2023-08-31 02:01:13,330 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.470515407190022 [2023-08-31 02:01:13,331 INFO L72 ComplementDD]: Start complementDD. Operand 116 states and 10261 transitions. [2023-08-31 02:01:13,331 INFO L73 IsDeterministic]: Start isDeterministic. Operand 116 states and 10261 transitions. [2023-08-31 02:01:13,332 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:01:13,332 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 116 states and 10261 transitions. [2023-08-31 02:01:13,338 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 117 states, 116 states have (on average 88.45689655172414) internal successors, (10261), 116 states have internal predecessors, (10261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:01:13,346 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 117 states, 117 states have (on average 188.0) internal successors, (21996), 117 states have internal predecessors, (21996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:01:13,348 INFO L81 ComplementDD]: Finished complementDD. Result has 117 states, 117 states have (on average 188.0) internal successors, (21996), 117 states have internal predecessors, (21996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:01:13,348 INFO L175 Difference]: Start difference. First operand has 760 places, 1826 transitions, 41852 flow. Second operand 116 states and 10261 transitions. [2023-08-31 02:01:13,348 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 821 places, 2837 transitions, 70294 flow [2023-08-31 02:01:54,848 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 765 places, 2837 transitions, 64903 flow, removed 2565 selfloop flow, removed 56 redundant places. [2023-08-31 02:01:54,902 INFO L231 Difference]: Finished difference. Result has 803 places, 1988 transitions, 47475 flow [2023-08-31 02:01:54,904 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=188, PETRI_DIFFERENCE_MINUEND_FLOW=39623, PETRI_DIFFERENCE_MINUEND_PLACES=650, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1826, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=708, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1064, PETRI_DIFFERENCE_SUBTRAHEND_STATES=116, PETRI_FLOW=47475, PETRI_PLACES=803, PETRI_TRANSITIONS=1988} [2023-08-31 02:01:54,904 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 773 predicate places. [2023-08-31 02:01:54,905 INFO L495 AbstractCegarLoop]: Abstraction has has 803 places, 1988 transitions, 47475 flow [2023-08-31 02:01:54,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 84.16666666666667) internal successors, (2525), 30 states have internal predecessors, (2525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:01:54,905 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:01:54,905 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:01:54,913 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-08-31 02:01:55,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-08-31 02:01:55,111 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 02:01:55,111 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:01:55,111 INFO L85 PathProgramCache]: Analyzing trace with hash -275210114, now seen corresponding path program 18 times [2023-08-31 02:01:55,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:01:55,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092245427] [2023-08-31 02:01:55,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:01:55,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:01:55,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:01:56,024 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:01:56,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:01:56,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092245427] [2023-08-31 02:01:56,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092245427] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:01:56,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853589834] [2023-08-31 02:01:56,024 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-31 02:01:56,024 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:01:56,025 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:01:56,025 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 02:01:56,027 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-08-31 02:01:56,152 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2023-08-31 02:01:56,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 02:01:56,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-31 02:01:56,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:01:56,894 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:01:56,894 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:01:59,163 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:01:59,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [853589834] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:01:59,164 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:01:59,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 29 [2023-08-31 02:01:59,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555246785] [2023-08-31 02:01:59,164 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:01:59,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-31 02:01:59,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:01:59,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-31 02:01:59,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=687, Unknown=0, NotChecked=0, Total=870 [2023-08-31 02:01:59,375 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 188 [2023-08-31 02:01:59,377 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 803 places, 1988 transitions, 47475 flow. Second operand has 30 states, 30 states have (on average 81.53333333333333) internal successors, (2446), 30 states have internal predecessors, (2446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:01:59,377 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:01:59,377 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 188 [2023-08-31 02:01:59,377 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:02:25,328 INFO L130 PetriNetUnfolder]: 21364/34655 cut-off events. [2023-08-31 02:02:25,329 INFO L131 PetriNetUnfolder]: For 1746303/1746303 co-relation queries the response was YES. [2023-08-31 02:02:26,061 INFO L83 FinitePrefix]: Finished finitePrefix Result has 319123 conditions, 34655 events. 21364/34655 cut-off events. For 1746303/1746303 co-relation queries the response was YES. Maximal size of possible extension queue 1223. Compared 259934 event pairs, 1591 based on Foata normal form. 610/35265 useless extension candidates. Maximal degree in co-relation 318868. Up to 14042 conditions per place. [2023-08-31 02:02:26,205 INFO L137 encePairwiseOnDemand]: 179/188 looper letters, 1552 selfloop transitions, 849 changer transitions 660/3061 dead transitions. [2023-08-31 02:02:26,205 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 884 places, 3061 transitions, 75847 flow [2023-08-31 02:02:26,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2023-08-31 02:02:26,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2023-08-31 02:02:26,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 10704 transitions. [2023-08-31 02:02:26,210 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45548936170212767 [2023-08-31 02:02:26,211 INFO L72 ComplementDD]: Start complementDD. Operand 125 states and 10704 transitions. [2023-08-31 02:02:26,211 INFO L73 IsDeterministic]: Start isDeterministic. Operand 125 states and 10704 transitions. [2023-08-31 02:02:26,212 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:02:26,212 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 125 states and 10704 transitions. [2023-08-31 02:02:26,218 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 126 states, 125 states have (on average 85.632) internal successors, (10704), 125 states have internal predecessors, (10704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:02:26,227 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 126 states, 126 states have (on average 188.0) internal successors, (23688), 126 states have internal predecessors, (23688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:02:26,228 INFO L81 ComplementDD]: Finished complementDD. Result has 126 states, 126 states have (on average 188.0) internal successors, (23688), 126 states have internal predecessors, (23688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:02:26,228 INFO L175 Difference]: Start difference. First operand has 803 places, 1988 transitions, 47475 flow. Second operand 125 states and 10704 transitions. [2023-08-31 02:02:26,228 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 884 places, 3061 transitions, 75847 flow [2023-08-31 02:02:45,085 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 831 places, 3061 transitions, 71385 flow, removed 2115 selfloop flow, removed 53 redundant places. [2023-08-31 02:02:45,141 INFO L231 Difference]: Finished difference. Result has 904 places, 2030 transitions, 49688 flow [2023-08-31 02:02:45,144 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=188, PETRI_DIFFERENCE_MINUEND_FLOW=44949, PETRI_DIFFERENCE_MINUEND_PLACES=707, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1988, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=714, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=125, PETRI_FLOW=49688, PETRI_PLACES=904, PETRI_TRANSITIONS=2030} [2023-08-31 02:02:45,144 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 874 predicate places. [2023-08-31 02:02:45,145 INFO L495 AbstractCegarLoop]: Abstraction has has 904 places, 2030 transitions, 49688 flow [2023-08-31 02:02:45,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 81.53333333333333) internal successors, (2446), 30 states have internal predecessors, (2446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:02:45,145 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:02:45,146 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:02:45,153 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-08-31 02:02:45,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:02:45,352 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 02:02:45,352 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:02:45,352 INFO L85 PathProgramCache]: Analyzing trace with hash 400638337, now seen corresponding path program 19 times [2023-08-31 02:02:45,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:02:45,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407184726] [2023-08-31 02:02:45,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:02:45,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:02:45,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:02:45,980 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:02:45,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:02:45,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407184726] [2023-08-31 02:02:45,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407184726] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:02:45,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577158049] [2023-08-31 02:02:45,981 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-31 02:02:45,981 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:02:45,981 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:02:45,985 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 02:02:46,011 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-08-31 02:02:46,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:02:46,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-31 02:02:46,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:02:46,648 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:02:46,648 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:02:48,906 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:02:48,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [577158049] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:02:48,907 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:02:48,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 29 [2023-08-31 02:02:48,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784674084] [2023-08-31 02:02:48,907 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:02:48,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-31 02:02:48,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:02:48,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-31 02:02:48,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=686, Unknown=0, NotChecked=0, Total=870 [2023-08-31 02:02:49,060 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 188 [2023-08-31 02:02:49,061 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 904 places, 2030 transitions, 49688 flow. Second operand has 30 states, 30 states have (on average 84.1) internal successors, (2523), 30 states have internal predecessors, (2523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:02:49,061 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:02:49,062 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 188 [2023-08-31 02:02:49,062 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:03:12,668 INFO L130 PetriNetUnfolder]: 15901/28575 cut-off events. [2023-08-31 02:03:12,668 INFO L131 PetriNetUnfolder]: For 4385103/4389689 co-relation queries the response was YES. [2023-08-31 02:03:13,244 INFO L83 FinitePrefix]: Finished finitePrefix Result has 395416 conditions, 28575 events. 15901/28575 cut-off events. For 4385103/4389689 co-relation queries the response was YES. Maximal size of possible extension queue 1279. Compared 247918 event pairs, 658 based on Foata normal form. 1096/29358 useless extension candidates. Maximal degree in co-relation 394137. Up to 8255 conditions per place. [2023-08-31 02:03:13,522 INFO L137 encePairwiseOnDemand]: 181/188 looper letters, 1587 selfloop transitions, 964 changer transitions 458/3079 dead transitions. [2023-08-31 02:03:13,523 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 938 places, 3079 transitions, 84422 flow [2023-08-31 02:03:13,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2023-08-31 02:03:13,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2023-08-31 02:03:13,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 9538 transitions. [2023-08-31 02:03:13,532 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47414993040365877 [2023-08-31 02:03:13,532 INFO L72 ComplementDD]: Start complementDD. Operand 107 states and 9538 transitions. [2023-08-31 02:03:13,532 INFO L73 IsDeterministic]: Start isDeterministic. Operand 107 states and 9538 transitions. [2023-08-31 02:03:13,533 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:03:13,533 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 107 states and 9538 transitions. [2023-08-31 02:03:13,540 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 108 states, 107 states have (on average 89.14018691588785) internal successors, (9538), 107 states have internal predecessors, (9538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:03:13,551 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 108 states, 108 states have (on average 188.0) internal successors, (20304), 108 states have internal predecessors, (20304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:03:13,553 INFO L81 ComplementDD]: Finished complementDD. Result has 108 states, 108 states have (on average 188.0) internal successors, (20304), 108 states have internal predecessors, (20304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:03:13,553 INFO L175 Difference]: Start difference. First operand has 904 places, 2030 transitions, 49688 flow. Second operand 107 states and 9538 transitions. [2023-08-31 02:03:13,553 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 938 places, 3079 transitions, 84422 flow [2023-08-31 02:03:49,207 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 845 places, 3079 transitions, 78465 flow, removed 2799 selfloop flow, removed 93 redundant places. [2023-08-31 02:03:49,251 INFO L231 Difference]: Finished difference. Result has 886 places, 2303 transitions, 59871 flow [2023-08-31 02:03:49,253 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=188, PETRI_DIFFERENCE_MINUEND_FLOW=48335, PETRI_DIFFERENCE_MINUEND_PLACES=739, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2030, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=711, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1265, PETRI_DIFFERENCE_SUBTRAHEND_STATES=107, PETRI_FLOW=59871, PETRI_PLACES=886, PETRI_TRANSITIONS=2303} [2023-08-31 02:03:49,253 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 856 predicate places. [2023-08-31 02:03:49,253 INFO L495 AbstractCegarLoop]: Abstraction has has 886 places, 2303 transitions, 59871 flow [2023-08-31 02:03:49,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 84.1) internal successors, (2523), 30 states have internal predecessors, (2523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:03:49,254 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:03:49,254 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:03:49,258 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-08-31 02:03:49,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:03:49,454 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 02:03:49,455 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:03:49,455 INFO L85 PathProgramCache]: Analyzing trace with hash -1581172496, now seen corresponding path program 20 times [2023-08-31 02:03:49,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:03:49,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857575758] [2023-08-31 02:03:49,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:03:49,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:03:49,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:03:49,957 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:03:49,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:03:49,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857575758] [2023-08-31 02:03:49,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857575758] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:03:49,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993524127] [2023-08-31 02:03:49,957 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 02:03:49,958 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:03:49,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:03:49,958 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 02:03:49,960 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-08-31 02:03:50,063 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 02:03:50,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 02:03:50,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-31 02:03:50,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:03:50,613 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:03:50,613 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:03:52,894 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:03:52,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1993524127] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:03:52,895 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:03:52,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 29 [2023-08-31 02:03:52,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476083897] [2023-08-31 02:03:52,895 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:03:52,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-31 02:03:52,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:03:52,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-31 02:03:52,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=689, Unknown=0, NotChecked=0, Total=870 [2023-08-31 02:03:53,070 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 188 [2023-08-31 02:03:53,071 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 886 places, 2303 transitions, 59871 flow. Second operand has 30 states, 30 states have (on average 81.53333333333333) internal successors, (2446), 30 states have internal predecessors, (2446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:03:53,071 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:03:53,071 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 188 [2023-08-31 02:03:53,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:04:29,158 INFO L130 PetriNetUnfolder]: 26177/42514 cut-off events. [2023-08-31 02:04:29,159 INFO L131 PetriNetUnfolder]: For 2950710/2950710 co-relation queries the response was YES. [2023-08-31 02:04:30,770 INFO L83 FinitePrefix]: Finished finitePrefix Result has 451543 conditions, 42514 events. 26177/42514 cut-off events. For 2950710/2950710 co-relation queries the response was YES. Maximal size of possible extension queue 1514. Compared 330759 event pairs, 2159 based on Foata normal form. 478/42992 useless extension candidates. Maximal degree in co-relation 450802. Up to 17754 conditions per place. [2023-08-31 02:04:30,962 INFO L137 encePairwiseOnDemand]: 179/188 looper letters, 1931 selfloop transitions, 1084 changer transitions 589/3604 dead transitions. [2023-08-31 02:04:30,963 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1005 places, 3604 transitions, 100701 flow [2023-08-31 02:04:30,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 156 states. [2023-08-31 02:04:30,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2023-08-31 02:04:30,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 13356 transitions. [2023-08-31 02:04:30,969 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4554009819967267 [2023-08-31 02:04:30,969 INFO L72 ComplementDD]: Start complementDD. Operand 156 states and 13356 transitions. [2023-08-31 02:04:30,969 INFO L73 IsDeterministic]: Start isDeterministic. Operand 156 states and 13356 transitions. [2023-08-31 02:04:30,970 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:04:30,971 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 156 states and 13356 transitions. [2023-08-31 02:04:30,978 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 157 states, 156 states have (on average 85.61538461538461) internal successors, (13356), 156 states have internal predecessors, (13356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:04:30,989 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 157 states, 157 states have (on average 188.0) internal successors, (29516), 157 states have internal predecessors, (29516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:04:30,990 INFO L81 ComplementDD]: Finished complementDD. Result has 157 states, 157 states have (on average 188.0) internal successors, (29516), 157 states have internal predecessors, (29516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:04:30,990 INFO L175 Difference]: Start difference. First operand has 886 places, 2303 transitions, 59871 flow. Second operand 156 states and 13356 transitions. [2023-08-31 02:04:30,990 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1005 places, 3604 transitions, 100701 flow [2023-08-31 02:05:20,858 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 955 places, 3604 transitions, 95550 flow, removed 2490 selfloop flow, removed 50 redundant places. [2023-08-31 02:05:20,913 INFO L231 Difference]: Finished difference. Result has 1054 places, 2568 transitions, 70036 flow [2023-08-31 02:05:20,914 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=188, PETRI_DIFFERENCE_MINUEND_FLOW=56992, PETRI_DIFFERENCE_MINUEND_PLACES=800, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=831, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1420, PETRI_DIFFERENCE_SUBTRAHEND_STATES=156, PETRI_FLOW=70036, PETRI_PLACES=1054, PETRI_TRANSITIONS=2568} [2023-08-31 02:05:20,915 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 1024 predicate places. [2023-08-31 02:05:20,915 INFO L495 AbstractCegarLoop]: Abstraction has has 1054 places, 2568 transitions, 70036 flow [2023-08-31 02:05:20,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 81.53333333333333) internal successors, (2446), 30 states have internal predecessors, (2446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:05:20,915 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:05:20,916 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:05:20,921 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-08-31 02:05:21,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-08-31 02:05:21,121 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 02:05:21,122 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:05:21,122 INFO L85 PathProgramCache]: Analyzing trace with hash -1670714576, now seen corresponding path program 21 times [2023-08-31 02:05:21,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:05:21,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492678970] [2023-08-31 02:05:21,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:05:21,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:05:21,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:05:21,717 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:05:21,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:05:21,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492678970] [2023-08-31 02:05:21,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492678970] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:05:21,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377575797] [2023-08-31 02:05:21,718 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 02:05:21,718 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:05:21,718 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:05:21,721 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 02:05:21,742 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-08-31 02:05:21,892 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2023-08-31 02:05:21,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 02:05:21,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-31 02:05:21,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:05:22,497 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:05:22,498 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:05:24,786 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:05:24,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1377575797] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:05:24,786 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:05:24,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 29 [2023-08-31 02:05:24,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59858164] [2023-08-31 02:05:24,786 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:05:24,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-31 02:05:24,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:05:24,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-31 02:05:24,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=697, Unknown=0, NotChecked=0, Total=870 [2023-08-31 02:05:24,977 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 188 [2023-08-31 02:05:24,978 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1054 places, 2568 transitions, 70036 flow. Second operand has 30 states, 30 states have (on average 81.53333333333333) internal successors, (2446), 30 states have internal predecessors, (2446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:05:24,978 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:05:24,978 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 188 [2023-08-31 02:05:24,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:06:06,046 INFO L130 PetriNetUnfolder]: 28007/45386 cut-off events. [2023-08-31 02:06:06,046 INFO L131 PetriNetUnfolder]: For 9721797/9721797 co-relation queries the response was YES. [2023-08-31 02:06:08,565 INFO L83 FinitePrefix]: Finished finitePrefix Result has 608466 conditions, 45386 events. 28007/45386 cut-off events. For 9721797/9721797 co-relation queries the response was YES. Maximal size of possible extension queue 1610. Compared 355309 event pairs, 2423 based on Foata normal form. 812/46198 useless extension candidates. Maximal degree in co-relation 607950. Up to 19158 conditions per place. [2023-08-31 02:06:08,999 INFO L137 encePairwiseOnDemand]: 179/188 looper letters, 1975 selfloop transitions, 1017 changer transitions 857/3849 dead transitions. [2023-08-31 02:06:08,999 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1110 places, 3849 transitions, 116127 flow [2023-08-31 02:06:08,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 145 states. [2023-08-31 02:06:09,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2023-08-31 02:06:09,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 12387 transitions. [2023-08-31 02:06:09,016 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4544020542920029 [2023-08-31 02:06:09,016 INFO L72 ComplementDD]: Start complementDD. Operand 145 states and 12387 transitions. [2023-08-31 02:06:09,016 INFO L73 IsDeterministic]: Start isDeterministic. Operand 145 states and 12387 transitions. [2023-08-31 02:06:09,021 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:06:09,021 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 145 states and 12387 transitions. [2023-08-31 02:06:09,036 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 146 states, 145 states have (on average 85.42758620689655) internal successors, (12387), 145 states have internal predecessors, (12387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:06:09,058 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 146 states, 146 states have (on average 188.0) internal successors, (27448), 146 states have internal predecessors, (27448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:06:09,061 INFO L81 ComplementDD]: Finished complementDD. Result has 146 states, 146 states have (on average 188.0) internal successors, (27448), 146 states have internal predecessors, (27448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:06:09,061 INFO L175 Difference]: Start difference. First operand has 1054 places, 2568 transitions, 70036 flow. Second operand 145 states and 12387 transitions. [2023-08-31 02:06:09,061 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1110 places, 3849 transitions, 116127 flow [2023-08-31 02:07:50,525 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1013 places, 3849 transitions, 105767 flow, removed 5107 selfloop flow, removed 97 redundant places. [2023-08-31 02:07:50,587 INFO L231 Difference]: Finished difference. Result has 1106 places, 2623 transitions, 73299 flow [2023-08-31 02:07:50,589 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=188, PETRI_DIFFERENCE_MINUEND_FLOW=66374, PETRI_DIFFERENCE_MINUEND_PLACES=869, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2568, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=849, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1659, PETRI_DIFFERENCE_SUBTRAHEND_STATES=145, PETRI_FLOW=73299, PETRI_PLACES=1106, PETRI_TRANSITIONS=2623} [2023-08-31 02:07:50,590 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 1076 predicate places. [2023-08-31 02:07:50,590 INFO L495 AbstractCegarLoop]: Abstraction has has 1106 places, 2623 transitions, 73299 flow [2023-08-31 02:07:50,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 81.53333333333333) internal successors, (2446), 30 states have internal predecessors, (2446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:07:50,590 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:07:50,591 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:07:50,598 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-08-31 02:07:50,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-08-31 02:07:50,796 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-31 02:07:50,797 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:07:50,797 INFO L85 PathProgramCache]: Analyzing trace with hash -2055918567, now seen corresponding path program 22 times [2023-08-31 02:07:50,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:07:50,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762270474] [2023-08-31 02:07:50,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:07:50,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:07:50,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:07:51,358 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:07:51,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:07:51,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762270474] [2023-08-31 02:07:51,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762270474] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:07:51,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958239665] [2023-08-31 02:07:51,358 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-31 02:07:51,359 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:07:51,359 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:07:51,360 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 02:07:51,363 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-08-31 02:07:51,468 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-31 02:07:51,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 02:07:51,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-31 02:07:51,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:07:52,031 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:07:52,031 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:07:54,172 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:07:54,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [958239665] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:07:54,173 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:07:54,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 29 [2023-08-31 02:07:54,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690950751] [2023-08-31 02:07:54,176 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:07:54,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-31 02:07:54,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:07:54,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-31 02:07:54,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=689, Unknown=0, NotChecked=0, Total=870 [2023-08-31 02:07:54,342 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 188 [2023-08-31 02:07:54,343 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1106 places, 2623 transitions, 73299 flow. Second operand has 30 states, 30 states have (on average 84.1) internal successors, (2523), 30 states have internal predecessors, (2523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:07:54,343 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:07:54,343 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 188 [2023-08-31 02:07:54,343 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:08:25,971 INFO L130 PetriNetUnfolder]: 18879/33865 cut-off events. [2023-08-31 02:08:25,971 INFO L131 PetriNetUnfolder]: For 9904962/9911900 co-relation queries the response was YES. [2023-08-31 02:08:27,161 INFO L83 FinitePrefix]: Finished finitePrefix Result has 561211 conditions, 33865 events. 18879/33865 cut-off events. For 9904962/9911900 co-relation queries the response was YES. Maximal size of possible extension queue 1521. Compared 299077 event pairs, 1472 based on Foata normal form. 1360/34900 useless extension candidates. Maximal degree in co-relation 560015. Up to 11044 conditions per place. [2023-08-31 02:08:27,516 INFO L137 encePairwiseOnDemand]: 181/188 looper letters, 1968 selfloop transitions, 991 changer transitions 451/3497 dead transitions. [2023-08-31 02:08:27,516 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1113 places, 3497 transitions, 108495 flow [2023-08-31 02:08:27,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2023-08-31 02:08:27,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2023-08-31 02:08:27,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 8200 transitions. [2023-08-31 02:08:27,520 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47409805735430155 [2023-08-31 02:08:27,520 INFO L72 ComplementDD]: Start complementDD. Operand 92 states and 8200 transitions. [2023-08-31 02:08:27,520 INFO L73 IsDeterministic]: Start isDeterministic. Operand 92 states and 8200 transitions. [2023-08-31 02:08:27,521 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:08:27,521 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 92 states and 8200 transitions. [2023-08-31 02:08:27,525 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 93 states, 92 states have (on average 89.1304347826087) internal successors, (8200), 92 states have internal predecessors, (8200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:08:27,533 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 93 states, 93 states have (on average 188.0) internal successors, (17484), 93 states have internal predecessors, (17484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:08:27,533 INFO L81 ComplementDD]: Finished complementDD. Result has 93 states, 93 states have (on average 188.0) internal successors, (17484), 93 states have internal predecessors, (17484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:08:27,534 INFO L175 Difference]: Start difference. First operand has 1106 places, 2623 transitions, 73299 flow. Second operand 92 states and 8200 transitions. [2023-08-31 02:08:27,534 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1113 places, 3497 transitions, 108495 flow Killed by 15