./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/popl20-mult-4.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --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/popl20-mult-4.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 2e6a14a531a7a58347cefef713565bcea13a3839848e23eb785379c30b602107 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 21:09:31,425 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 21:09:31,426 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 21:09:31,443 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 21:09:31,443 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 21:09:31,444 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 21:09:31,445 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 21:09:31,446 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 21:09:31,447 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 21:09:31,447 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 21:09:31,448 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 21:09:31,449 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 21:09:31,449 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 21:09:31,450 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 21:09:31,451 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 21:09:31,451 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 21:09:31,452 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 21:09:31,452 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 21:09:31,454 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 21:09:31,455 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 21:09:31,456 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 21:09:31,457 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 21:09:31,458 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 21:09:31,466 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 21:09:31,468 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 21:09:31,474 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 21:09:31,474 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 21:09:31,475 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 21:09:31,476 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 21:09:31,477 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 21:09:31,478 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 21:09:31,478 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 21:09:31,480 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 21:09:31,480 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 21:09:31,483 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 21:09:31,483 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 21:09:31,484 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 21:09:31,484 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 21:09:31,485 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 21:09:31,485 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 21:09:31,486 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 21:09:31,487 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-30 21:09:31,510 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 21:09:31,511 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 21:09:31,512 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 21:09:31,512 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 21:09:31,512 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 21:09:31,513 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 21:09:31,514 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 21:09:31,514 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 21:09:31,514 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 21:09:31,514 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 21:09:31,515 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 21:09:31,515 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 21:09:31,515 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 21:09:31,515 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 21:09:31,515 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-30 21:09:31,515 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 21:09:31,515 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-30 21:09:31,516 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 21:09:31,516 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-30 21:09:31,516 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 21:09:31,516 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-30 21:09:31,516 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 21:09:31,516 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 21:09:31,516 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 21:09:31,517 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 21:09:31,517 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 21:09:31,517 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 21:09:31,517 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-30 21:09:31,517 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 21:09:31,517 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 21:09:31,517 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 21:09:31,518 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-30 21:09:31,518 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 21:09:31,518 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 21:09:31,518 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 21:09:31,518 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2e6a14a531a7a58347cefef713565bcea13a3839848e23eb785379c30b602107 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 21:09:31,746 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 21:09:31,758 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 21:09:31,759 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 21:09:31,760 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 21:09:31,760 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 21:09:31,761 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-mult-4.wvr.c [2023-08-30 21:09:32,741 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 21:09:32,920 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 21:09:32,920 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-mult-4.wvr.c [2023-08-30 21:09:32,926 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4f46e1c94/0ac0f817841140d0b47c7757b220fbdc/FLAGff955da0b [2023-08-30 21:09:32,937 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4f46e1c94/0ac0f817841140d0b47c7757b220fbdc [2023-08-30 21:09:32,939 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 21:09:32,940 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 21:09:32,941 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 21:09:32,942 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 21:09:32,954 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 21:09:32,955 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 09:09:32" (1/1) ... [2023-08-30 21:09:32,956 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@405df335 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:09:32, skipping insertion in model container [2023-08-30 21:09:32,956 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 09:09:32" (1/1) ... [2023-08-30 21:09:32,960 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 21:09:32,970 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 21:09:33,069 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/popl20-mult-4.wvr.c[2612,2625] [2023-08-30 21:09:33,073 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 21:09:33,080 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 21:09:33,095 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/popl20-mult-4.wvr.c[2612,2625] [2023-08-30 21:09:33,096 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 21:09:33,102 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 21:09:33,102 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 21:09:33,107 INFO L208 MainTranslator]: Completed translation [2023-08-30 21:09:33,107 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:09:33 WrapperNode [2023-08-30 21:09:33,108 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 21:09:33,108 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 21:09:33,108 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 21:09:33,109 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 21:09:33,113 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:09:33" (1/1) ... [2023-08-30 21:09:33,130 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:09:33" (1/1) ... [2023-08-30 21:09:33,154 INFO L138 Inliner]: procedures = 23, calls = 42, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 119 [2023-08-30 21:09:33,155 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 21:09:33,155 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 21:09:33,155 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 21:09:33,155 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 21:09:33,161 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:09:33" (1/1) ... [2023-08-30 21:09:33,162 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:09:33" (1/1) ... [2023-08-30 21:09:33,169 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:09:33" (1/1) ... [2023-08-30 21:09:33,169 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:09:33" (1/1) ... [2023-08-30 21:09:33,172 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:09:33" (1/1) ... [2023-08-30 21:09:33,179 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:09:33" (1/1) ... [2023-08-30 21:09:33,180 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:09:33" (1/1) ... [2023-08-30 21:09:33,181 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:09:33" (1/1) ... [2023-08-30 21:09:33,183 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 21:09:33,183 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 21:09:33,183 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 21:09:33,184 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 21:09:33,184 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:09:33" (1/1) ... [2023-08-30 21:09:33,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 21:09:33,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:09:33,217 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) [2023-08-30 21:09:33,225 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 [2023-08-30 21:09:33,245 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 21:09:33,245 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-30 21:09:33,245 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-30 21:09:33,246 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-30 21:09:33,246 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-30 21:09:33,247 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-30 21:09:33,247 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-30 21:09:33,247 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-08-30 21:09:33,247 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-08-30 21:09:33,247 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 21:09:33,247 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 21:09:33,247 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 21:09:33,248 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-30 21:09:33,248 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-30 21:09:33,248 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 21:09:33,248 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 21:09:33,248 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 21:09:33,248 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 21:09:33,249 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-30 21:09:33,352 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 21:09:33,354 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 21:09:33,586 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 21:09:33,621 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 21:09:33,621 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-08-30 21:09:33,624 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 09:09:33 BoogieIcfgContainer [2023-08-30 21:09:33,624 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 21:09:33,626 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 21:09:33,626 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 21:09:33,628 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 21:09:33,628 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 09:09:32" (1/3) ... [2023-08-30 21:09:33,628 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c380512 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 09:09:33, skipping insertion in model container [2023-08-30 21:09:33,628 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:09:33" (2/3) ... [2023-08-30 21:09:33,629 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c380512 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 09:09:33, skipping insertion in model container [2023-08-30 21:09:33,629 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 09:09:33" (3/3) ... [2023-08-30 21:09:33,629 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-mult-4.wvr.c [2023-08-30 21:09:33,634 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-30 21:09:33,640 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 21:09:33,640 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-30 21:09:33,640 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 21:09:33,695 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-30 21:09:33,719 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 131 places, 128 transitions, 288 flow [2023-08-30 21:09:33,766 INFO L130 PetriNetUnfolder]: 10/124 cut-off events. [2023-08-30 21:09:33,767 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-08-30 21:09:33,770 INFO L83 FinitePrefix]: Finished finitePrefix Result has 141 conditions, 124 events. 10/124 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 95 event pairs, 0 based on Foata normal form. 0/113 useless extension candidates. Maximal degree in co-relation 85. Up to 2 conditions per place. [2023-08-30 21:09:33,770 INFO L82 GeneralOperation]: Start removeDead. Operand has 131 places, 128 transitions, 288 flow [2023-08-30 21:09:33,773 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 115 places, 112 transitions, 248 flow [2023-08-30 21:09:33,775 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 21:09:33,781 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 115 places, 112 transitions, 248 flow [2023-08-30 21:09:33,783 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 115 places, 112 transitions, 248 flow [2023-08-30 21:09:33,783 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 115 places, 112 transitions, 248 flow [2023-08-30 21:09:33,803 INFO L130 PetriNetUnfolder]: 10/112 cut-off events. [2023-08-30 21:09:33,803 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-08-30 21:09:33,804 INFO L83 FinitePrefix]: Finished finitePrefix Result has 129 conditions, 112 events. 10/112 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 94 event pairs, 0 based on Foata normal form. 0/102 useless extension candidates. Maximal degree in co-relation 85. Up to 2 conditions per place. [2023-08-30 21:09:33,805 INFO L119 LiptonReduction]: Number of co-enabled transitions 2520 [2023-08-30 21:09:36,409 INFO L134 LiptonReduction]: Checked pairs total: 2598 [2023-08-30 21:09:36,420 INFO L136 LiptonReduction]: Total number of compositions: 94 [2023-08-30 21:09:36,430 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 21:09:36,439 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;@20bc5fd6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 21:09:36,440 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-08-30 21:09:36,445 INFO L130 PetriNetUnfolder]: 4/28 cut-off events. [2023-08-30 21:09:36,446 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-08-30 21:09:36,446 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:09:36,446 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:09:36,447 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 2 more)] === [2023-08-30 21:09:36,450 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:09:36,450 INFO L85 PathProgramCache]: Analyzing trace with hash 1971920350, now seen corresponding path program 1 times [2023-08-30 21:09:36,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:09:36,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802832949] [2023-08-30 21:09:36,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:09:36,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:09:36,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:09:36,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:09:36,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:09:36,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802832949] [2023-08-30 21:09:36,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802832949] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 21:09:36,778 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 21:09:36,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 21:09:36,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689194055] [2023-08-30 21:09:36,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 21:09:36,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 21:09:36,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:09:36,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 21:09:36,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 21:09:36,813 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 222 [2023-08-30 21:09:36,815 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 29 transitions, 82 flow. Second operand has 3 states, 3 states have (on average 115.0) internal successors, (345), 3 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:09:36,816 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:09:36,816 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 222 [2023-08-30 21:09:36,817 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:09:36,989 INFO L130 PetriNetUnfolder]: 1343/1736 cut-off events. [2023-08-30 21:09:36,989 INFO L131 PetriNetUnfolder]: For 131/131 co-relation queries the response was YES. [2023-08-30 21:09:36,992 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3612 conditions, 1736 events. 1343/1736 cut-off events. For 131/131 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 5850 event pairs, 215 based on Foata normal form. 1/1054 useless extension candidates. Maximal degree in co-relation 2691. Up to 1515 conditions per place. [2023-08-30 21:09:36,999 INFO L137 encePairwiseOnDemand]: 216/222 looper letters, 39 selfloop transitions, 3 changer transitions 3/49 dead transitions. [2023-08-30 21:09:36,999 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 49 transitions, 233 flow [2023-08-30 21:09:37,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 21:09:37,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 21:09:37,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 372 transitions. [2023-08-30 21:09:37,009 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5585585585585585 [2023-08-30 21:09:37,010 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 372 transitions. [2023-08-30 21:09:37,010 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 372 transitions. [2023-08-30 21:09:37,011 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:09:37,013 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 372 transitions. [2023-08-30 21:09:37,015 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 124.0) internal successors, (372), 3 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:09:37,018 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 222.0) internal successors, (888), 4 states have internal predecessors, (888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:09:37,018 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 222.0) internal successors, (888), 4 states have internal predecessors, (888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:09:37,020 INFO L175 Difference]: Start difference. First operand has 38 places, 29 transitions, 82 flow. Second operand 3 states and 372 transitions. [2023-08-30 21:09:37,020 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 49 transitions, 233 flow [2023-08-30 21:09:37,024 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 49 transitions, 203 flow, removed 0 selfloop flow, removed 8 redundant places. [2023-08-30 21:09:37,025 INFO L231 Difference]: Finished difference. Result has 33 places, 31 transitions, 89 flow [2023-08-30 21:09:37,026 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=222, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=89, PETRI_PLACES=33, PETRI_TRANSITIONS=31} [2023-08-30 21:09:37,029 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -5 predicate places. [2023-08-30 21:09:37,029 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 31 transitions, 89 flow [2023-08-30 21:09:37,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 115.0) internal successors, (345), 3 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:09:37,030 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:09:37,030 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:09:37,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 21:09:37,031 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 2 more)] === [2023-08-30 21:09:37,031 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:09:37,031 INFO L85 PathProgramCache]: Analyzing trace with hash 550150448, now seen corresponding path program 1 times [2023-08-30 21:09:37,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:09:37,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031731225] [2023-08-30 21:09:37,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:09:37,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:09:37,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:09:37,225 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:09:37,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:09:37,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031731225] [2023-08-30 21:09:37,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031731225] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 21:09:37,226 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 21:09:37,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 21:09:37,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461685165] [2023-08-30 21:09:37,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 21:09:37,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 21:09:37,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:09:37,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 21:09:37,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 21:09:37,287 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 222 [2023-08-30 21:09:37,288 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 31 transitions, 89 flow. Second operand has 5 states, 5 states have (on average 104.8) internal successors, (524), 5 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:09:37,288 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:09:37,288 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 222 [2023-08-30 21:09:37,288 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:09:37,567 INFO L130 PetriNetUnfolder]: 1929/2707 cut-off events. [2023-08-30 21:09:37,567 INFO L131 PetriNetUnfolder]: For 828/828 co-relation queries the response was YES. [2023-08-30 21:09:37,570 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6276 conditions, 2707 events. 1929/2707 cut-off events. For 828/828 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 12322 event pairs, 489 based on Foata normal form. 304/2995 useless extension candidates. Maximal degree in co-relation 2470. Up to 1349 conditions per place. [2023-08-30 21:09:37,579 INFO L137 encePairwiseOnDemand]: 215/222 looper letters, 74 selfloop transitions, 4 changer transitions 2/82 dead transitions. [2023-08-30 21:09:37,579 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 82 transitions, 384 flow [2023-08-30 21:09:37,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 21:09:37,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 21:09:37,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 582 transitions. [2023-08-30 21:09:37,593 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5243243243243243 [2023-08-30 21:09:37,593 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 582 transitions. [2023-08-30 21:09:37,593 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 582 transitions. [2023-08-30 21:09:37,594 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:09:37,594 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 582 transitions. [2023-08-30 21:09:37,595 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 116.4) internal successors, (582), 5 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:09:37,598 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 222.0) internal successors, (1332), 6 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:09:37,599 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 222.0) internal successors, (1332), 6 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:09:37,599 INFO L175 Difference]: Start difference. First operand has 33 places, 31 transitions, 89 flow. Second operand 5 states and 582 transitions. [2023-08-30 21:09:37,599 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 82 transitions, 384 flow [2023-08-30 21:09:37,600 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 82 transitions, 379 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 21:09:37,602 INFO L231 Difference]: Finished difference. Result has 39 places, 34 transitions, 134 flow [2023-08-30 21:09:37,602 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=222, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=134, PETRI_PLACES=39, PETRI_TRANSITIONS=34} [2023-08-30 21:09:37,602 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 1 predicate places. [2023-08-30 21:09:37,603 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 34 transitions, 134 flow [2023-08-30 21:09:37,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 104.8) internal successors, (524), 5 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:09:37,603 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:09:37,603 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:09:37,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-30 21:09:37,603 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 2 more)] === [2023-08-30 21:09:37,605 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:09:37,606 INFO L85 PathProgramCache]: Analyzing trace with hash -634446788, now seen corresponding path program 2 times [2023-08-30 21:09:37,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:09:37,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990054746] [2023-08-30 21:09:37,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:09:37,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:09:37,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:09:37,727 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:09:37,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:09:37,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990054746] [2023-08-30 21:09:37,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990054746] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 21:09:37,727 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 21:09:37,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 21:09:37,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320643711] [2023-08-30 21:09:37,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 21:09:37,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 21:09:37,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:09:37,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 21:09:37,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 21:09:37,749 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 222 [2023-08-30 21:09:37,750 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 34 transitions, 134 flow. Second operand has 4 states, 4 states have (on average 107.75) internal successors, (431), 4 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:09:37,750 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:09:37,750 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 222 [2023-08-30 21:09:37,750 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:09:37,970 INFO L130 PetriNetUnfolder]: 1807/2582 cut-off events. [2023-08-30 21:09:37,970 INFO L131 PetriNetUnfolder]: For 2758/3083 co-relation queries the response was YES. [2023-08-30 21:09:37,973 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7767 conditions, 2582 events. 1807/2582 cut-off events. For 2758/3083 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 12128 event pairs, 489 based on Foata normal form. 400/2953 useless extension candidates. Maximal degree in co-relation 1682. Up to 1640 conditions per place. [2023-08-30 21:09:37,981 INFO L137 encePairwiseOnDemand]: 218/222 looper letters, 54 selfloop transitions, 4 changer transitions 7/69 dead transitions. [2023-08-30 21:09:37,981 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 69 transitions, 381 flow [2023-08-30 21:09:37,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 21:09:37,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 21:09:37,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 470 transitions. [2023-08-30 21:09:37,982 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5292792792792793 [2023-08-30 21:09:37,982 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 470 transitions. [2023-08-30 21:09:37,982 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 470 transitions. [2023-08-30 21:09:37,983 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:09:37,983 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 470 transitions. [2023-08-30 21:09:38,001 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 117.5) internal successors, (470), 4 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:09:38,003 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 222.0) internal successors, (1110), 5 states have internal predecessors, (1110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:09:38,003 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 222.0) internal successors, (1110), 5 states have internal predecessors, (1110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:09:38,003 INFO L175 Difference]: Start difference. First operand has 39 places, 34 transitions, 134 flow. Second operand 4 states and 470 transitions. [2023-08-30 21:09:38,003 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 69 transitions, 381 flow [2023-08-30 21:09:38,007 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 69 transitions, 374 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-30 21:09:38,008 INFO L231 Difference]: Finished difference. Result has 43 places, 36 transitions, 160 flow [2023-08-30 21:09:38,008 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=222, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=160, PETRI_PLACES=43, PETRI_TRANSITIONS=36} [2023-08-30 21:09:38,009 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 5 predicate places. [2023-08-30 21:09:38,011 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 36 transitions, 160 flow [2023-08-30 21:09:38,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 107.75) internal successors, (431), 4 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:09:38,012 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:09:38,012 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:09:38,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-30 21:09:38,013 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 2 more)] === [2023-08-30 21:09:38,013 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:09:38,013 INFO L85 PathProgramCache]: Analyzing trace with hash 1967310179, now seen corresponding path program 1 times [2023-08-30 21:09:38,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:09:38,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756197663] [2023-08-30 21:09:38,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:09:38,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:09:38,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:09:38,138 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:09:38,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:09:38,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756197663] [2023-08-30 21:09:38,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756197663] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 21:09:38,139 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 21:09:38,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 21:09:38,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625567657] [2023-08-30 21:09:38,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 21:09:38,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 21:09:38,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:09:38,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 21:09:38,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 21:09:38,164 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 222 [2023-08-30 21:09:38,164 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 36 transitions, 160 flow. Second operand has 5 states, 5 states have (on average 104.8) internal successors, (524), 5 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:09:38,164 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:09:38,165 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 222 [2023-08-30 21:09:38,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:09:38,445 INFO L130 PetriNetUnfolder]: 2391/3500 cut-off events. [2023-08-30 21:09:38,445 INFO L131 PetriNetUnfolder]: For 6576/6968 co-relation queries the response was YES. [2023-08-30 21:09:38,448 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10873 conditions, 3500 events. 2391/3500 cut-off events. For 6576/6968 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 18396 event pairs, 729 based on Foata normal form. 569/4038 useless extension candidates. Maximal degree in co-relation 4402. Up to 1997 conditions per place. [2023-08-30 21:09:38,457 INFO L137 encePairwiseOnDemand]: 215/222 looper letters, 63 selfloop transitions, 5 changer transitions 18/88 dead transitions. [2023-08-30 21:09:38,458 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 88 transitions, 514 flow [2023-08-30 21:09:38,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 21:09:38,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 21:09:38,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 579 transitions. [2023-08-30 21:09:38,461 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5216216216216216 [2023-08-30 21:09:38,462 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 579 transitions. [2023-08-30 21:09:38,462 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 579 transitions. [2023-08-30 21:09:38,462 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:09:38,462 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 579 transitions. [2023-08-30 21:09:38,463 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 115.8) internal successors, (579), 5 states have internal predecessors, (579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:09:38,464 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 222.0) internal successors, (1332), 6 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:09:38,465 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 222.0) internal successors, (1332), 6 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:09:38,465 INFO L175 Difference]: Start difference. First operand has 43 places, 36 transitions, 160 flow. Second operand 5 states and 579 transitions. [2023-08-30 21:09:38,465 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 88 transitions, 514 flow [2023-08-30 21:09:38,469 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 88 transitions, 509 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-30 21:09:38,469 INFO L231 Difference]: Finished difference. Result has 49 places, 38 transitions, 200 flow [2023-08-30 21:09:38,470 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=222, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=200, PETRI_PLACES=49, PETRI_TRANSITIONS=38} [2023-08-30 21:09:38,470 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 11 predicate places. [2023-08-30 21:09:38,470 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 38 transitions, 200 flow [2023-08-30 21:09:38,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 104.8) internal successors, (524), 5 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:09:38,471 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:09:38,471 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:09:38,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-30 21:09:38,471 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 2 more)] === [2023-08-30 21:09:38,472 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:09:38,472 INFO L85 PathProgramCache]: Analyzing trace with hash -630595977, now seen corresponding path program 2 times [2023-08-30 21:09:38,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:09:38,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286518808] [2023-08-30 21:09:38,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:09:38,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:09:38,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:09:38,530 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:09:38,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:09:38,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286518808] [2023-08-30 21:09:38,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286518808] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 21:09:38,531 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 21:09:38,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 21:09:38,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044286412] [2023-08-30 21:09:38,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 21:09:38,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 21:09:38,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:09:38,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 21:09:38,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 21:09:38,551 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 222 [2023-08-30 21:09:38,552 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 38 transitions, 200 flow. Second operand has 4 states, 4 states have (on average 107.75) internal successors, (431), 4 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:09:38,552 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:09:38,552 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 222 [2023-08-30 21:09:38,552 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:09:38,849 INFO L130 PetriNetUnfolder]: 2636/3791 cut-off events. [2023-08-30 21:09:38,849 INFO L131 PetriNetUnfolder]: For 12510/13050 co-relation queries the response was YES. [2023-08-30 21:09:38,854 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14035 conditions, 3791 events. 2636/3791 cut-off events. For 12510/13050 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 19034 event pairs, 704 based on Foata normal form. 474/4113 useless extension candidates. Maximal degree in co-relation 8693. Up to 1833 conditions per place. [2023-08-30 21:09:38,869 INFO L137 encePairwiseOnDemand]: 216/222 looper letters, 63 selfloop transitions, 10 changer transitions 1/79 dead transitions. [2023-08-30 21:09:38,870 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 79 transitions, 570 flow [2023-08-30 21:09:38,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 21:09:38,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 21:09:38,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 470 transitions. [2023-08-30 21:09:38,871 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5292792792792793 [2023-08-30 21:09:38,871 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 470 transitions. [2023-08-30 21:09:38,872 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 470 transitions. [2023-08-30 21:09:38,872 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:09:38,872 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 470 transitions. [2023-08-30 21:09:38,873 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 117.5) internal successors, (470), 4 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:09:38,874 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 222.0) internal successors, (1110), 5 states have internal predecessors, (1110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:09:38,875 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 222.0) internal successors, (1110), 5 states have internal predecessors, (1110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:09:38,875 INFO L175 Difference]: Start difference. First operand has 49 places, 38 transitions, 200 flow. Second operand 4 states and 470 transitions. [2023-08-30 21:09:38,875 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 79 transitions, 570 flow [2023-08-30 21:09:38,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 79 transitions, 549 flow, removed 7 selfloop flow, removed 2 redundant places. [2023-08-30 21:09:38,885 INFO L231 Difference]: Finished difference. Result has 51 places, 46 transitions, 321 flow [2023-08-30 21:09:38,885 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=222, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=321, PETRI_PLACES=51, PETRI_TRANSITIONS=46} [2023-08-30 21:09:38,886 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 13 predicate places. [2023-08-30 21:09:38,886 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 46 transitions, 321 flow [2023-08-30 21:09:38,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 107.75) internal successors, (431), 4 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:09:38,886 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:09:38,886 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:09:38,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-30 21:09:38,887 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 2 more)] === [2023-08-30 21:09:38,887 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:09:38,887 INFO L85 PathProgramCache]: Analyzing trace with hash 373265492, now seen corresponding path program 3 times [2023-08-30 21:09:38,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:09:38,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064372194] [2023-08-30 21:09:38,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:09:38,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:09:38,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:09:38,949 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:09:38,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:09:38,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064372194] [2023-08-30 21:09:38,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064372194] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 21:09:38,950 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 21:09:38,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 21:09:38,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023112579] [2023-08-30 21:09:38,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 21:09:38,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 21:09:38,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:09:38,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 21:09:38,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 21:09:38,970 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 222 [2023-08-30 21:09:38,971 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 46 transitions, 321 flow. Second operand has 4 states, 4 states have (on average 107.75) internal successors, (431), 4 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:09:38,971 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:09:38,971 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 222 [2023-08-30 21:09:38,971 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:09:39,349 INFO L130 PetriNetUnfolder]: 3959/5512 cut-off events. [2023-08-30 21:09:39,350 INFO L131 PetriNetUnfolder]: For 27139/27835 co-relation queries the response was YES. [2023-08-30 21:09:39,355 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23963 conditions, 5512 events. 3959/5512 cut-off events. For 27139/27835 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 27821 event pairs, 1419 based on Foata normal form. 655/6035 useless extension candidates. Maximal degree in co-relation 11708. Up to 3327 conditions per place. [2023-08-30 21:09:39,374 INFO L137 encePairwiseOnDemand]: 216/222 looper letters, 69 selfloop transitions, 19 changer transitions 5/97 dead transitions. [2023-08-30 21:09:39,374 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 97 transitions, 845 flow [2023-08-30 21:09:39,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 21:09:39,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 21:09:39,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 471 transitions. [2023-08-30 21:09:39,376 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5304054054054054 [2023-08-30 21:09:39,376 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 471 transitions. [2023-08-30 21:09:39,376 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 471 transitions. [2023-08-30 21:09:39,376 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:09:39,377 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 471 transitions. [2023-08-30 21:09:39,377 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 117.75) internal successors, (471), 4 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:09:39,378 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 222.0) internal successors, (1110), 5 states have internal predecessors, (1110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:09:39,379 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 222.0) internal successors, (1110), 5 states have internal predecessors, (1110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:09:39,379 INFO L175 Difference]: Start difference. First operand has 51 places, 46 transitions, 321 flow. Second operand 4 states and 471 transitions. [2023-08-30 21:09:39,379 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 97 transitions, 845 flow [2023-08-30 21:09:39,399 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 97 transitions, 810 flow, removed 14 selfloop flow, removed 1 redundant places. [2023-08-30 21:09:39,400 INFO L231 Difference]: Finished difference. Result has 55 places, 59 transitions, 542 flow [2023-08-30 21:09:39,400 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=222, PETRI_DIFFERENCE_MINUEND_FLOW=304, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=542, PETRI_PLACES=55, PETRI_TRANSITIONS=59} [2023-08-30 21:09:39,401 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 17 predicate places. [2023-08-30 21:09:39,401 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 59 transitions, 542 flow [2023-08-30 21:09:39,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 107.75) internal successors, (431), 4 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:09:39,402 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:09:39,402 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:09:39,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-30 21:09:39,402 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 2 more)] === [2023-08-30 21:09:39,402 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:09:39,402 INFO L85 PathProgramCache]: Analyzing trace with hash 913151625, now seen corresponding path program 3 times [2023-08-30 21:09:39,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:09:39,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828807790] [2023-08-30 21:09:39,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:09:39,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:09:39,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:09:39,454 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:09:39,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:09:39,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828807790] [2023-08-30 21:09:39,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828807790] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 21:09:39,455 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 21:09:39,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 21:09:39,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422129047] [2023-08-30 21:09:39,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 21:09:39,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 21:09:39,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:09:39,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 21:09:39,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 21:09:39,472 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 222 [2023-08-30 21:09:39,473 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 59 transitions, 542 flow. Second operand has 4 states, 4 states have (on average 107.75) internal successors, (431), 4 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:09:39,473 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:09:39,473 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 222 [2023-08-30 21:09:39,473 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:09:39,897 INFO L130 PetriNetUnfolder]: 4069/5629 cut-off events. [2023-08-30 21:09:39,898 INFO L131 PetriNetUnfolder]: For 34585/35242 co-relation queries the response was YES. [2023-08-30 21:09:39,904 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26334 conditions, 5629 events. 4069/5629 cut-off events. For 34585/35242 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 28061 event pairs, 1051 based on Foata normal form. 543/6085 useless extension candidates. Maximal degree in co-relation 17951. Up to 4642 conditions per place. [2023-08-30 21:09:39,923 INFO L137 encePairwiseOnDemand]: 218/222 looper letters, 70 selfloop transitions, 9 changer transitions 12/95 dead transitions. [2023-08-30 21:09:39,924 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 95 transitions, 932 flow [2023-08-30 21:09:39,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 21:09:39,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 21:09:39,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 466 transitions. [2023-08-30 21:09:39,925 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5247747747747747 [2023-08-30 21:09:39,926 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 466 transitions. [2023-08-30 21:09:39,926 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 466 transitions. [2023-08-30 21:09:39,926 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:09:39,926 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 466 transitions. [2023-08-30 21:09:39,927 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 116.5) internal successors, (466), 4 states have internal predecessors, (466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:09:39,928 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 222.0) internal successors, (1110), 5 states have internal predecessors, (1110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:09:39,928 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 222.0) internal successors, (1110), 5 states have internal predecessors, (1110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:09:39,928 INFO L175 Difference]: Start difference. First operand has 55 places, 59 transitions, 542 flow. Second operand 4 states and 466 transitions. [2023-08-30 21:09:39,928 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 95 transitions, 932 flow [2023-08-30 21:09:39,942 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 95 transitions, 922 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 21:09:39,943 INFO L231 Difference]: Finished difference. Result has 59 places, 61 transitions, 588 flow [2023-08-30 21:09:39,943 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=222, PETRI_DIFFERENCE_MINUEND_FLOW=532, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=588, PETRI_PLACES=59, PETRI_TRANSITIONS=61} [2023-08-30 21:09:39,943 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 21 predicate places. [2023-08-30 21:09:39,944 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 61 transitions, 588 flow [2023-08-30 21:09:39,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 107.75) internal successors, (431), 4 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:09:39,944 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:09:39,944 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:09:39,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-30 21:09:39,944 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 2 more)] === [2023-08-30 21:09:39,945 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:09:39,945 INFO L85 PathProgramCache]: Analyzing trace with hash -254193814, now seen corresponding path program 4 times [2023-08-30 21:09:39,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:09:39,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123327342] [2023-08-30 21:09:39,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:09:39,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:09:39,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:09:40,022 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:09:40,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:09:40,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123327342] [2023-08-30 21:09:40,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123327342] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 21:09:40,022 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 21:09:40,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 21:09:40,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020063221] [2023-08-30 21:09:40,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 21:09:40,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 21:09:40,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:09:40,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 21:09:40,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-30 21:09:40,054 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 222 [2023-08-30 21:09:40,055 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 61 transitions, 588 flow. Second operand has 5 states, 5 states have (on average 103.8) internal successors, (519), 5 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:09:40,055 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:09:40,055 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 222 [2023-08-30 21:09:40,055 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:09:40,598 INFO L130 PetriNetUnfolder]: 4191/5821 cut-off events. [2023-08-30 21:09:40,599 INFO L131 PetriNetUnfolder]: For 34875/35391 co-relation queries the response was YES. [2023-08-30 21:09:40,606 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27011 conditions, 5821 events. 4191/5821 cut-off events. For 34875/35391 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 29329 event pairs, 1433 based on Foata normal form. 467/6264 useless extension candidates. Maximal degree in co-relation 21531. Up to 4101 conditions per place. [2023-08-30 21:09:40,624 INFO L137 encePairwiseOnDemand]: 216/222 looper letters, 87 selfloop transitions, 16 changer transitions 21/126 dead transitions. [2023-08-30 21:09:40,624 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 126 transitions, 1224 flow [2023-08-30 21:09:40,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 21:09:40,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 21:09:40,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 679 transitions. [2023-08-30 21:09:40,626 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5097597597597597 [2023-08-30 21:09:40,626 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 679 transitions. [2023-08-30 21:09:40,626 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 679 transitions. [2023-08-30 21:09:40,627 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:09:40,627 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 679 transitions. [2023-08-30 21:09:40,628 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 113.16666666666667) internal successors, (679), 6 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:09:40,629 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 222.0) internal successors, (1554), 7 states have internal predecessors, (1554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:09:40,630 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 222.0) internal successors, (1554), 7 states have internal predecessors, (1554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:09:40,630 INFO L175 Difference]: Start difference. First operand has 59 places, 61 transitions, 588 flow. Second operand 6 states and 679 transitions. [2023-08-30 21:09:40,630 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 126 transitions, 1224 flow [2023-08-30 21:09:40,643 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 126 transitions, 1176 flow, removed 18 selfloop flow, removed 2 redundant places. [2023-08-30 21:09:40,648 INFO L231 Difference]: Finished difference. Result has 63 places, 66 transitions, 691 flow [2023-08-30 21:09:40,648 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=222, PETRI_DIFFERENCE_MINUEND_FLOW=556, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=691, PETRI_PLACES=63, PETRI_TRANSITIONS=66} [2023-08-30 21:09:40,650 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 25 predicate places. [2023-08-30 21:09:40,650 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 66 transitions, 691 flow [2023-08-30 21:09:40,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 103.8) internal successors, (519), 5 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:09:40,650 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:09:40,651 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:09:40,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-30 21:09:40,651 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 2 more)] === [2023-08-30 21:09:40,651 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:09:40,651 INFO L85 PathProgramCache]: Analyzing trace with hash 48622009, now seen corresponding path program 4 times [2023-08-30 21:09:40,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:09:40,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31162609] [2023-08-30 21:09:40,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:09:40,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:09:40,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:09:40,728 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:09:40,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:09:40,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31162609] [2023-08-30 21:09:40,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31162609] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 21:09:40,728 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 21:09:40,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 21:09:40,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135579345] [2023-08-30 21:09:40,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 21:09:40,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 21:09:40,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:09:40,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 21:09:40,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 21:09:40,743 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 222 [2023-08-30 21:09:40,744 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 66 transitions, 691 flow. Second operand has 4 states, 4 states have (on average 107.75) internal successors, (431), 4 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:09:40,744 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:09:40,744 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 222 [2023-08-30 21:09:40,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:09:41,299 INFO L130 PetriNetUnfolder]: 5266/7366 cut-off events. [2023-08-30 21:09:41,299 INFO L131 PetriNetUnfolder]: For 67702/70243 co-relation queries the response was YES. [2023-08-30 21:09:41,308 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35154 conditions, 7366 events. 5266/7366 cut-off events. For 67702/70243 co-relation queries the response was YES. Maximal size of possible extension queue 414. Compared 38692 event pairs, 1726 based on Foata normal form. 1773/8952 useless extension candidates. Maximal degree in co-relation 26456. Up to 4880 conditions per place. [2023-08-30 21:09:41,335 INFO L137 encePairwiseOnDemand]: 216/222 looper letters, 117 selfloop transitions, 6 changer transitions 0/129 dead transitions. [2023-08-30 21:09:41,336 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 129 transitions, 1596 flow [2023-08-30 21:09:41,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 21:09:41,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 21:09:41,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 464 transitions. [2023-08-30 21:09:41,337 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5225225225225225 [2023-08-30 21:09:41,337 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 464 transitions. [2023-08-30 21:09:41,337 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 464 transitions. [2023-08-30 21:09:41,338 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:09:41,338 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 464 transitions. [2023-08-30 21:09:41,339 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 116.0) internal successors, (464), 4 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:09:41,340 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 222.0) internal successors, (1110), 5 states have internal predecessors, (1110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:09:41,340 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 222.0) internal successors, (1110), 5 states have internal predecessors, (1110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:09:41,340 INFO L175 Difference]: Start difference. First operand has 63 places, 66 transitions, 691 flow. Second operand 4 states and 464 transitions. [2023-08-30 21:09:41,340 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 129 transitions, 1596 flow [2023-08-30 21:09:41,353 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 129 transitions, 1533 flow, removed 8 selfloop flow, removed 2 redundant places. [2023-08-30 21:09:41,354 INFO L231 Difference]: Finished difference. Result has 65 places, 71 transitions, 809 flow [2023-08-30 21:09:41,355 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=222, PETRI_DIFFERENCE_MINUEND_FLOW=658, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=809, PETRI_PLACES=65, PETRI_TRANSITIONS=71} [2023-08-30 21:09:41,355 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 27 predicate places. [2023-08-30 21:09:41,355 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 71 transitions, 809 flow [2023-08-30 21:09:41,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 107.75) internal successors, (431), 4 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:09:41,356 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:09:41,356 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:09:41,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-30 21:09:41,356 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 2 more)] === [2023-08-30 21:09:41,356 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:09:41,357 INFO L85 PathProgramCache]: Analyzing trace with hash -234274435, now seen corresponding path program 5 times [2023-08-30 21:09:41,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:09:41,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51540058] [2023-08-30 21:09:41,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:09:41,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:09:41,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:09:41,408 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:09:41,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:09:41,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51540058] [2023-08-30 21:09:41,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51540058] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 21:09:41,409 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 21:09:41,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 21:09:41,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607401441] [2023-08-30 21:09:41,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 21:09:41,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 21:09:41,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:09:41,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 21:09:41,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 21:09:41,429 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 222 [2023-08-30 21:09:41,429 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 71 transitions, 809 flow. Second operand has 4 states, 4 states have (on average 107.75) internal successors, (431), 4 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:09:41,430 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:09:41,430 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 222 [2023-08-30 21:09:41,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:09:41,895 INFO L130 PetriNetUnfolder]: 4779/6700 cut-off events. [2023-08-30 21:09:41,895 INFO L131 PetriNetUnfolder]: For 55435/57405 co-relation queries the response was YES. [2023-08-30 21:09:41,909 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36636 conditions, 6700 events. 4779/6700 cut-off events. For 55435/57405 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 34177 event pairs, 1447 based on Foata normal form. 1495/8061 useless extension candidates. Maximal degree in co-relation 29093. Up to 4406 conditions per place. [2023-08-30 21:09:41,933 INFO L137 encePairwiseOnDemand]: 217/222 looper letters, 82 selfloop transitions, 15 changer transitions 12/115 dead transitions. [2023-08-30 21:09:41,933 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 115 transitions, 1347 flow [2023-08-30 21:09:41,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 21:09:41,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 21:09:41,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 470 transitions. [2023-08-30 21:09:41,935 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5292792792792793 [2023-08-30 21:09:41,935 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 470 transitions. [2023-08-30 21:09:41,935 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 470 transitions. [2023-08-30 21:09:41,935 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:09:41,935 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 470 transitions. [2023-08-30 21:09:41,936 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 117.5) internal successors, (470), 4 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:09:41,937 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 222.0) internal successors, (1110), 5 states have internal predecessors, (1110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:09:41,938 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 222.0) internal successors, (1110), 5 states have internal predecessors, (1110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:09:41,938 INFO L175 Difference]: Start difference. First operand has 65 places, 71 transitions, 809 flow. Second operand 4 states and 470 transitions. [2023-08-30 21:09:41,938 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 115 transitions, 1347 flow [2023-08-30 21:09:41,958 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 115 transitions, 1328 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-30 21:09:41,960 INFO L231 Difference]: Finished difference. Result has 69 places, 73 transitions, 876 flow [2023-08-30 21:09:41,960 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=222, PETRI_DIFFERENCE_MINUEND_FLOW=796, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=876, PETRI_PLACES=69, PETRI_TRANSITIONS=73} [2023-08-30 21:09:41,961 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 31 predicate places. [2023-08-30 21:09:41,961 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 73 transitions, 876 flow [2023-08-30 21:09:41,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 107.75) internal successors, (431), 4 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:09:41,961 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:09:41,961 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:09:41,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-30 21:09:41,962 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 2 more)] === [2023-08-30 21:09:41,962 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:09:41,962 INFO L85 PathProgramCache]: Analyzing trace with hash -1251327380, now seen corresponding path program 1 times [2023-08-30 21:09:41,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:09:41,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582359596] [2023-08-30 21:09:41,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:09:41,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:09:41,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:09:42,038 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 21:09:42,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:09:42,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582359596] [2023-08-30 21:09:42,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582359596] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 21:09:42,038 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 21:09:42,038 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 21:09:42,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777417286] [2023-08-30 21:09:42,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 21:09:42,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 21:09:42,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:09:42,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 21:09:42,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 21:09:42,065 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 222 [2023-08-30 21:09:42,066 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 73 transitions, 876 flow. Second operand has 5 states, 5 states have (on average 105.0) internal successors, (525), 5 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:09:42,066 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:09:42,066 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 222 [2023-08-30 21:09:42,066 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:09:42,586 INFO L130 PetriNetUnfolder]: 4201/5794 cut-off events. [2023-08-30 21:09:42,587 INFO L131 PetriNetUnfolder]: For 59445/60555 co-relation queries the response was YES. [2023-08-30 21:09:42,597 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32881 conditions, 5794 events. 4201/5794 cut-off events. For 59445/60555 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 27820 event pairs, 1667 based on Foata normal form. 1024/6763 useless extension candidates. Maximal degree in co-relation 26313. Up to 4049 conditions per place. [2023-08-30 21:09:42,621 INFO L137 encePairwiseOnDemand]: 217/222 looper letters, 78 selfloop transitions, 13 changer transitions 18/112 dead transitions. [2023-08-30 21:09:42,622 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 112 transitions, 1365 flow [2023-08-30 21:09:42,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 21:09:42,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 21:09:42,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 560 transitions. [2023-08-30 21:09:42,624 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5045045045045045 [2023-08-30 21:09:42,624 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 560 transitions. [2023-08-30 21:09:42,624 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 560 transitions. [2023-08-30 21:09:42,624 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:09:42,624 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 560 transitions. [2023-08-30 21:09:42,625 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 112.0) internal successors, (560), 5 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:09:42,627 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 222.0) internal successors, (1332), 6 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:09:42,627 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 222.0) internal successors, (1332), 6 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:09:42,627 INFO L175 Difference]: Start difference. First operand has 69 places, 73 transitions, 876 flow. Second operand 5 states and 560 transitions. [2023-08-30 21:09:42,627 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 112 transitions, 1365 flow [2023-08-30 21:09:42,660 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 112 transitions, 1304 flow, removed 7 selfloop flow, removed 3 redundant places. [2023-08-30 21:09:42,662 INFO L231 Difference]: Finished difference. Result has 72 places, 73 transitions, 874 flow [2023-08-30 21:09:42,662 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=222, PETRI_DIFFERENCE_MINUEND_FLOW=823, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=874, PETRI_PLACES=72, PETRI_TRANSITIONS=73} [2023-08-30 21:09:42,662 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 34 predicate places. [2023-08-30 21:09:42,662 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 73 transitions, 874 flow [2023-08-30 21:09:42,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 105.0) internal successors, (525), 5 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:09:42,663 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:09:42,663 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:09:42,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-30 21:09:42,663 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 2 more)] === [2023-08-30 21:09:42,664 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:09:42,664 INFO L85 PathProgramCache]: Analyzing trace with hash 1898023995, now seen corresponding path program 1 times [2023-08-30 21:09:42,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:09:42,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76739830] [2023-08-30 21:09:42,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:09:42,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:09:42,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:09:42,740 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:09:42,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:09:42,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76739830] [2023-08-30 21:09:42,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76739830] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 21:09:42,740 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 21:09:42,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 21:09:42,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697213596] [2023-08-30 21:09:42,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 21:09:42,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 21:09:42,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:09:42,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 21:09:42,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-30 21:09:42,769 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 222 [2023-08-30 21:09:42,770 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 73 transitions, 874 flow. Second operand has 5 states, 5 states have (on average 105.0) internal successors, (525), 5 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:09:42,770 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:09:42,770 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 222 [2023-08-30 21:09:42,770 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:09:43,270 INFO L130 PetriNetUnfolder]: 4197/5653 cut-off events. [2023-08-30 21:09:43,270 INFO L131 PetriNetUnfolder]: For 59686/60734 co-relation queries the response was YES. [2023-08-30 21:09:43,281 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34240 conditions, 5653 events. 4197/5653 cut-off events. For 59686/60734 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 25502 event pairs, 1565 based on Foata normal form. 1008/6589 useless extension candidates. Maximal degree in co-relation 30326. Up to 4391 conditions per place. [2023-08-30 21:09:43,306 INFO L137 encePairwiseOnDemand]: 215/222 looper letters, 83 selfloop transitions, 29 changer transitions 6/121 dead transitions. [2023-08-30 21:09:43,306 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 121 transitions, 1562 flow [2023-08-30 21:09:43,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 21:09:43,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 21:09:43,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 562 transitions. [2023-08-30 21:09:43,308 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5063063063063064 [2023-08-30 21:09:43,308 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 562 transitions. [2023-08-30 21:09:43,308 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 562 transitions. [2023-08-30 21:09:43,309 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:09:43,309 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 562 transitions. [2023-08-30 21:09:43,310 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 112.4) internal successors, (562), 5 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:09:43,311 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 222.0) internal successors, (1332), 6 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:09:43,312 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 222.0) internal successors, (1332), 6 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:09:43,312 INFO L175 Difference]: Start difference. First operand has 72 places, 73 transitions, 874 flow. Second operand 5 states and 562 transitions. [2023-08-30 21:09:43,312 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 121 transitions, 1562 flow [2023-08-30 21:09:43,348 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 121 transitions, 1428 flow, removed 52 selfloop flow, removed 4 redundant places. [2023-08-30 21:09:43,350 INFO L231 Difference]: Finished difference. Result has 71 places, 86 transitions, 1079 flow [2023-08-30 21:09:43,350 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=222, PETRI_DIFFERENCE_MINUEND_FLOW=792, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1079, PETRI_PLACES=71, PETRI_TRANSITIONS=86} [2023-08-30 21:09:43,351 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 33 predicate places. [2023-08-30 21:09:43,351 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 86 transitions, 1079 flow [2023-08-30 21:09:43,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 105.0) internal successors, (525), 5 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:09:43,351 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:09:43,351 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:09:43,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-30 21:09:43,352 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 2 more)] === [2023-08-30 21:09:43,352 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:09:43,352 INFO L85 PathProgramCache]: Analyzing trace with hash 967516647, now seen corresponding path program 1 times [2023-08-30 21:09:43,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:09:43,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294436192] [2023-08-30 21:09:43,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:09:43,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:09:43,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:09:43,465 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:09:43,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:09:43,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294436192] [2023-08-30 21:09:43,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294436192] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:09:43,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805992401] [2023-08-30 21:09:43,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:09:43,466 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:09:43,466 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:09:43,469 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) [2023-08-30 21:09:43,515 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-30 21:09:43,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:09:43,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 21:09:43,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:09:43,689 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:09:43,689 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:09:43,756 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:09:43,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1805992401] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-30 21:09:43,756 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-30 21:09:43,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 5] total 6 [2023-08-30 21:09:43,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070781529] [2023-08-30 21:09:43,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 21:09:43,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 21:09:43,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:09:43,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 21:09:43,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-08-30 21:09:43,778 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 222 [2023-08-30 21:09:43,778 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 86 transitions, 1079 flow. Second operand has 4 states, 4 states have (on average 108.25) internal successors, (433), 4 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:09:43,779 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:09:43,779 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 222 [2023-08-30 21:09:43,779 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:09:44,457 INFO L130 PetriNetUnfolder]: 5554/7244 cut-off events. [2023-08-30 21:09:44,457 INFO L131 PetriNetUnfolder]: For 84222/86425 co-relation queries the response was YES. [2023-08-30 21:09:44,469 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45650 conditions, 7244 events. 5554/7244 cut-off events. For 84222/86425 co-relation queries the response was YES. Maximal size of possible extension queue 381. Compared 31186 event pairs, 1070 based on Foata normal form. 1098/8191 useless extension candidates. Maximal degree in co-relation 36019. Up to 6002 conditions per place. [2023-08-30 21:09:44,495 INFO L137 encePairwiseOnDemand]: 217/222 looper letters, 116 selfloop transitions, 19 changer transitions 1/143 dead transitions. [2023-08-30 21:09:44,496 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 143 transitions, 1973 flow [2023-08-30 21:09:44,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 21:09:44,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 21:09:44,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 460 transitions. [2023-08-30 21:09:44,497 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5180180180180181 [2023-08-30 21:09:44,497 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 460 transitions. [2023-08-30 21:09:44,498 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 460 transitions. [2023-08-30 21:09:44,498 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:09:44,498 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 460 transitions. [2023-08-30 21:09:44,499 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 115.0) internal successors, (460), 4 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:09:44,500 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 222.0) internal successors, (1110), 5 states have internal predecessors, (1110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:09:44,500 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 222.0) internal successors, (1110), 5 states have internal predecessors, (1110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:09:44,500 INFO L175 Difference]: Start difference. First operand has 71 places, 86 transitions, 1079 flow. Second operand 4 states and 460 transitions. [2023-08-30 21:09:44,501 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 143 transitions, 1973 flow [2023-08-30 21:09:44,526 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 143 transitions, 1871 flow, removed 28 selfloop flow, removed 4 redundant places. [2023-08-30 21:09:44,527 INFO L231 Difference]: Finished difference. Result has 70 places, 93 transitions, 1158 flow [2023-08-30 21:09:44,528 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=222, PETRI_DIFFERENCE_MINUEND_FLOW=1001, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1158, PETRI_PLACES=70, PETRI_TRANSITIONS=93} [2023-08-30 21:09:44,528 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 32 predicate places. [2023-08-30 21:09:44,528 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 93 transitions, 1158 flow [2023-08-30 21:09:44,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 108.25) internal successors, (433), 4 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:09:44,529 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:09:44,529 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:09:44,550 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-30 21:09:44,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-08-30 21:09:44,734 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 2 more)] === [2023-08-30 21:09:44,734 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:09:44,735 INFO L85 PathProgramCache]: Analyzing trace with hash -1526123081, now seen corresponding path program 2 times [2023-08-30 21:09:44,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:09:44,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690195524] [2023-08-30 21:09:44,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:09:44,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:09:44,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:09:44,806 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 21:09:44,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:09:44,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690195524] [2023-08-30 21:09:44,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690195524] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:09:44,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441848149] [2023-08-30 21:09:44,806 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 21:09:44,806 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:09:44,807 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:09:44,820 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) [2023-08-30 21:09:44,821 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-30 21:09:44,901 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 21:09:44,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:09:44,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 21:09:44,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:09:44,948 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 21:09:44,948 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:09:44,988 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 21:09:44,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1441848149] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:09:44,988 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:09:44,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-08-30 21:09:44,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364683716] [2023-08-30 21:09:44,988 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:09:44,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 21:09:44,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:09:44,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 21:09:44,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-08-30 21:09:45,028 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 222 [2023-08-30 21:09:45,029 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 93 transitions, 1158 flow. Second operand has 8 states, 8 states have (on average 103.5) internal successors, (828), 8 states have internal predecessors, (828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:09:45,029 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:09:45,029 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 222 [2023-08-30 21:09:45,030 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:09:45,662 INFO L130 PetriNetUnfolder]: 6710/8604 cut-off events. [2023-08-30 21:09:45,662 INFO L131 PetriNetUnfolder]: For 104664/105795 co-relation queries the response was YES. [2023-08-30 21:09:45,679 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57175 conditions, 8604 events. 6710/8604 cut-off events. For 104664/105795 co-relation queries the response was YES. Maximal size of possible extension queue 447. Compared 35602 event pairs, 1400 based on Foata normal form. 1197/9756 useless extension candidates. Maximal degree in co-relation 41583. Up to 5421 conditions per place. [2023-08-30 21:09:45,715 INFO L137 encePairwiseOnDemand]: 215/222 looper letters, 135 selfloop transitions, 97 changer transitions 2/239 dead transitions. [2023-08-30 21:09:45,715 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 239 transitions, 3638 flow [2023-08-30 21:09:45,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 21:09:45,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 21:09:45,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 669 transitions. [2023-08-30 21:09:45,717 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5022522522522522 [2023-08-30 21:09:45,717 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 669 transitions. [2023-08-30 21:09:45,717 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 669 transitions. [2023-08-30 21:09:45,718 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:09:45,718 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 669 transitions. [2023-08-30 21:09:45,719 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 111.5) internal successors, (669), 6 states have internal predecessors, (669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:09:45,720 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 222.0) internal successors, (1554), 7 states have internal predecessors, (1554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:09:45,720 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 222.0) internal successors, (1554), 7 states have internal predecessors, (1554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:09:45,721 INFO L175 Difference]: Start difference. First operand has 70 places, 93 transitions, 1158 flow. Second operand 6 states and 669 transitions. [2023-08-30 21:09:45,721 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 239 transitions, 3638 flow [2023-08-30 21:09:45,777 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 239 transitions, 3376 flow, removed 114 selfloop flow, removed 1 redundant places. [2023-08-30 21:09:45,780 INFO L231 Difference]: Finished difference. Result has 77 places, 175 transitions, 2755 flow [2023-08-30 21:09:45,780 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=222, PETRI_DIFFERENCE_MINUEND_FLOW=1082, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2755, PETRI_PLACES=77, PETRI_TRANSITIONS=175} [2023-08-30 21:09:45,781 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 39 predicate places. [2023-08-30 21:09:45,781 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 175 transitions, 2755 flow [2023-08-30 21:09:45,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 103.5) internal successors, (828), 8 states have internal predecessors, (828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:09:45,781 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:09:45,781 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:09:45,791 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-30 21:09:45,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-08-30 21:09:45,986 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 2 more)] === [2023-08-30 21:09:45,987 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:09:45,987 INFO L85 PathProgramCache]: Analyzing trace with hash 423727133, now seen corresponding path program 1 times [2023-08-30 21:09:45,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:09:45,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032171435] [2023-08-30 21:09:45,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:09:45,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:09:46,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:09:46,078 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 21:09:46,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:09:46,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032171435] [2023-08-30 21:09:46,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032171435] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:09:46,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007575821] [2023-08-30 21:09:46,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:09:46,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:09:46,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:09:46,094 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) [2023-08-30 21:09:46,117 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-30 21:09:46,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:09:46,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-30 21:09:46,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:09:46,244 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 21:09:46,244 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:09:46,296 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 21:09:46,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1007575821] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:09:46,296 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:09:46,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 7 [2023-08-30 21:09:46,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993421658] [2023-08-30 21:09:46,297 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:09:46,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 21:09:46,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:09:46,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 21:09:46,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-08-30 21:09:46,331 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 222 [2023-08-30 21:09:46,331 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 175 transitions, 2755 flow. Second operand has 8 states, 8 states have (on average 114.0) internal successors, (912), 8 states have internal predecessors, (912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:09:46,332 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:09:46,332 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 222 [2023-08-30 21:09:46,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:09:47,552 INFO L130 PetriNetUnfolder]: 12306/16025 cut-off events. [2023-08-30 21:09:47,552 INFO L131 PetriNetUnfolder]: For 236807/241514 co-relation queries the response was YES. [2023-08-30 21:09:47,583 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110797 conditions, 16025 events. 12306/16025 cut-off events. For 236807/241514 co-relation queries the response was YES. Maximal size of possible extension queue 812. Compared 76960 event pairs, 1296 based on Foata normal form. 3116/17982 useless extension candidates. Maximal degree in co-relation 98264. Up to 10285 conditions per place. [2023-08-30 21:09:47,662 INFO L137 encePairwiseOnDemand]: 216/222 looper letters, 162 selfloop transitions, 167 changer transitions 3/344 dead transitions. [2023-08-30 21:09:47,662 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 344 transitions, 5614 flow [2023-08-30 21:09:47,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 21:09:47,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 21:09:47,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 495 transitions. [2023-08-30 21:09:47,664 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5574324324324325 [2023-08-30 21:09:47,664 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 495 transitions. [2023-08-30 21:09:47,664 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 495 transitions. [2023-08-30 21:09:47,664 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:09:47,664 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 495 transitions. [2023-08-30 21:09:47,665 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 123.75) internal successors, (495), 4 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:09:47,666 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 222.0) internal successors, (1110), 5 states have internal predecessors, (1110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:09:47,666 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 222.0) internal successors, (1110), 5 states have internal predecessors, (1110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:09:47,667 INFO L175 Difference]: Start difference. First operand has 77 places, 175 transitions, 2755 flow. Second operand 4 states and 495 transitions. [2023-08-30 21:09:47,667 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 344 transitions, 5614 flow [2023-08-30 21:09:47,803 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 344 transitions, 5400 flow, removed 84 selfloop flow, removed 2 redundant places. [2023-08-30 21:09:47,810 INFO L231 Difference]: Finished difference. Result has 79 places, 307 transitions, 5508 flow [2023-08-30 21:09:47,811 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=222, PETRI_DIFFERENCE_MINUEND_FLOW=2613, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=5508, PETRI_PLACES=79, PETRI_TRANSITIONS=307} [2023-08-30 21:09:47,811 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 41 predicate places. [2023-08-30 21:09:47,811 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 307 transitions, 5508 flow [2023-08-30 21:09:47,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 114.0) internal successors, (912), 8 states have internal predecessors, (912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:09:47,812 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:09:47,812 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:09:47,821 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-08-30 21:09:48,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:09:48,017 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 2 more)] === [2023-08-30 21:09:48,017 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:09:48,017 INFO L85 PathProgramCache]: Analyzing trace with hash 147049617, now seen corresponding path program 2 times [2023-08-30 21:09:48,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:09:48,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575361200] [2023-08-30 21:09:48,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:09:48,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:09:48,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:09:48,182 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:09:48,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:09:48,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575361200] [2023-08-30 21:09:48,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575361200] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:09:48,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936197680] [2023-08-30 21:09:48,182 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 21:09:48,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:09:48,183 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:09:48,198 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) [2023-08-30 21:09:48,211 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-30 21:09:48,307 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 21:09:48,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:09:48,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 19 conjunts are in the unsatisfiable core [2023-08-30 21:09:48,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:09:48,360 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:09:48,360 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:09:48,422 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:09:48,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1936197680] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:09:48,423 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:09:48,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 7 [2023-08-30 21:09:48,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134153370] [2023-08-30 21:09:48,424 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:09:48,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-30 21:09:48,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:09:48,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-30 21:09:48,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2023-08-30 21:09:48,457 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 222 [2023-08-30 21:09:48,458 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 307 transitions, 5508 flow. Second operand has 9 states, 9 states have (on average 112.66666666666667) internal successors, (1014), 9 states have internal predecessors, (1014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:09:48,458 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:09:48,459 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 222 [2023-08-30 21:09:48,459 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:09:51,699 INFO L130 PetriNetUnfolder]: 23620/30836 cut-off events. [2023-08-30 21:09:51,699 INFO L131 PetriNetUnfolder]: For 595698/603632 co-relation queries the response was YES. [2023-08-30 21:09:51,786 INFO L83 FinitePrefix]: Finished finitePrefix Result has 239377 conditions, 30836 events. 23620/30836 cut-off events. For 595698/603632 co-relation queries the response was YES. Maximal size of possible extension queue 1530. Compared 162725 event pairs, 2059 based on Foata normal form. 4919/33922 useless extension candidates. Maximal degree in co-relation 212854. Up to 19599 conditions per place. [2023-08-30 21:09:51,927 INFO L137 encePairwiseOnDemand]: 216/222 looper letters, 181 selfloop transitions, 379 changer transitions 3/575 dead transitions. [2023-08-30 21:09:51,927 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 575 transitions, 10577 flow [2023-08-30 21:09:51,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 21:09:51,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 21:09:51,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 624 transitions. [2023-08-30 21:09:51,929 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5621621621621622 [2023-08-30 21:09:51,929 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 624 transitions. [2023-08-30 21:09:51,929 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 624 transitions. [2023-08-30 21:09:51,929 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:09:51,929 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 624 transitions. [2023-08-30 21:09:51,930 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 124.8) internal successors, (624), 5 states have internal predecessors, (624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:09:51,932 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 222.0) internal successors, (1332), 6 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:09:51,932 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 222.0) internal successors, (1332), 6 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:09:51,932 INFO L175 Difference]: Start difference. First operand has 79 places, 307 transitions, 5508 flow. Second operand 5 states and 624 transitions. [2023-08-30 21:09:51,932 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 575 transitions, 10577 flow [2023-08-30 21:09:52,258 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 575 transitions, 10383 flow, removed 97 selfloop flow, removed 0 redundant places. [2023-08-30 21:09:52,266 INFO L231 Difference]: Finished difference. Result has 85 places, 519 transitions, 10439 flow [2023-08-30 21:09:52,266 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=222, PETRI_DIFFERENCE_MINUEND_FLOW=5314, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=307, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=236, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=10439, PETRI_PLACES=85, PETRI_TRANSITIONS=519} [2023-08-30 21:09:52,267 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 47 predicate places. [2023-08-30 21:09:52,267 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 519 transitions, 10439 flow [2023-08-30 21:09:52,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 112.66666666666667) internal successors, (1014), 9 states have internal predecessors, (1014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:09:52,267 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:09:52,267 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:09:52,273 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-08-30 21:09:52,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-08-30 21:09:52,473 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 2 more)] === [2023-08-30 21:09:52,473 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:09:52,473 INFO L85 PathProgramCache]: Analyzing trace with hash 263795595, now seen corresponding path program 3 times [2023-08-30 21:09:52,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:09:52,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109119156] [2023-08-30 21:09:52,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:09:52,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:09:52,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:09:52,595 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 21:09:52,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:09:52,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109119156] [2023-08-30 21:09:52,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109119156] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:09:52,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960136813] [2023-08-30 21:09:52,596 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 21:09:52,596 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:09:52,596 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:09:52,597 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) [2023-08-30 21:09:52,599 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-30 21:09:52,674 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 21:09:52,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:09:52,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 21:09:52,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:09:52,738 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 21:09:52,738 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:09:52,812 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 21:09:52,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1960136813] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:09:52,812 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:09:52,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 14 [2023-08-30 21:09:52,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630756950] [2023-08-30 21:09:52,813 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:09:52,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-30 21:09:52,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:09:52,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-30 21:09:52,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2023-08-30 21:09:52,993 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 222 [2023-08-30 21:09:52,994 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 519 transitions, 10439 flow. Second operand has 14 states, 14 states have (on average 100.92857142857143) internal successors, (1413), 14 states have internal predecessors, (1413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:09:52,994 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:09:52,994 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 222 [2023-08-30 21:09:52,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:10:07,514 INFO L130 PetriNetUnfolder]: 73165/99419 cut-off events. [2023-08-30 21:10:07,514 INFO L131 PetriNetUnfolder]: For 1652660/1658110 co-relation queries the response was YES. [2023-08-30 21:10:07,824 INFO L83 FinitePrefix]: Finished finitePrefix Result has 736479 conditions, 99419 events. 73165/99419 cut-off events. For 1652660/1658110 co-relation queries the response was YES. Maximal size of possible extension queue 3861. Compared 647629 event pairs, 2626 based on Foata normal form. 7292/106701 useless extension candidates. Maximal degree in co-relation 696923. Up to 41573 conditions per place. [2023-08-30 21:10:08,354 INFO L137 encePairwiseOnDemand]: 213/222 looper letters, 2496 selfloop transitions, 935 changer transitions 0/3434 dead transitions. [2023-08-30 21:10:08,355 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 3434 transitions, 69490 flow [2023-08-30 21:10:08,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2023-08-30 21:10:08,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2023-08-30 21:10:08,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 5120 transitions. [2023-08-30 21:10:08,364 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4907034694268737 [2023-08-30 21:10:08,364 INFO L72 ComplementDD]: Start complementDD. Operand 47 states and 5120 transitions. [2023-08-30 21:10:08,365 INFO L73 IsDeterministic]: Start isDeterministic. Operand 47 states and 5120 transitions. [2023-08-30 21:10:08,366 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:10:08,366 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 47 states and 5120 transitions. [2023-08-30 21:10:08,373 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 48 states, 47 states have (on average 108.93617021276596) internal successors, (5120), 47 states have internal predecessors, (5120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:10:08,382 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 48 states, 48 states have (on average 222.0) internal successors, (10656), 48 states have internal predecessors, (10656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:10:08,383 INFO L81 ComplementDD]: Finished complementDD. Result has 48 states, 48 states have (on average 222.0) internal successors, (10656), 48 states have internal predecessors, (10656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:10:08,383 INFO L175 Difference]: Start difference. First operand has 85 places, 519 transitions, 10439 flow. Second operand 47 states and 5120 transitions. [2023-08-30 21:10:08,384 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 3434 transitions, 69490 flow [2023-08-30 21:10:12,040 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 3434 transitions, 65338 flow, removed 2076 selfloop flow, removed 0 redundant places. [2023-08-30 21:10:12,069 INFO L231 Difference]: Finished difference. Result has 169 places, 1477 transitions, 31404 flow [2023-08-30 21:10:12,069 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=222, PETRI_DIFFERENCE_MINUEND_FLOW=9821, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=519, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=197, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=31404, PETRI_PLACES=169, PETRI_TRANSITIONS=1477} [2023-08-30 21:10:12,070 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 131 predicate places. [2023-08-30 21:10:12,070 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 1477 transitions, 31404 flow [2023-08-30 21:10:12,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 100.92857142857143) internal successors, (1413), 14 states have internal predecessors, (1413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:10:12,071 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:10:12,071 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:10:12,076 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-30 21:10:12,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-08-30 21:10:12,276 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 2 more)] === [2023-08-30 21:10:12,276 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:10:12,276 INFO L85 PathProgramCache]: Analyzing trace with hash -560273567, now seen corresponding path program 4 times [2023-08-30 21:10:12,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:10:12,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83748496] [2023-08-30 21:10:12,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:10:12,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:10:12,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:10:12,385 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 21:10:12,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:10:12,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83748496] [2023-08-30 21:10:12,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83748496] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:10:12,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236206786] [2023-08-30 21:10:12,386 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 21:10:12,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:10:12,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:10:12,401 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) [2023-08-30 21:10:12,403 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-30 21:10:12,481 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 21:10:12,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:10:12,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 21:10:12,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:10:12,535 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 21:10:12,535 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:10:12,592 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 21:10:12,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [236206786] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:10:12,592 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:10:12,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 14 [2023-08-30 21:10:12,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340912877] [2023-08-30 21:10:12,593 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:10:12,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-30 21:10:12,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:10:12,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-30 21:10:12,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2023-08-30 21:10:12,695 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 222 [2023-08-30 21:10:12,697 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 1477 transitions, 31404 flow. Second operand has 14 states, 14 states have (on average 99.28571428571429) internal successors, (1390), 14 states have internal predecessors, (1390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:10:12,697 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:10:12,697 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 222 [2023-08-30 21:10:12,697 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:11:18,319 INFO L130 PetriNetUnfolder]: 182421/252798 cut-off events. [2023-08-30 21:11:18,320 INFO L131 PetriNetUnfolder]: For 7924589/7928551 co-relation queries the response was YES. [2023-08-30 21:11:20,533 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2305237 conditions, 252798 events. 182421/252798 cut-off events. For 7924589/7928551 co-relation queries the response was YES. Maximal size of possible extension queue 9717. Compared 1890504 event pairs, 7429 based on Foata normal form. 8952/261746 useless extension candidates. Maximal degree in co-relation 2174794. Up to 91989 conditions per place. [2023-08-30 21:11:21,846 INFO L137 encePairwiseOnDemand]: 213/222 looper letters, 4077 selfloop transitions, 2849 changer transitions 108/7052 dead transitions. [2023-08-30 21:11:21,847 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 7052 transitions, 157459 flow [2023-08-30 21:11:21,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2023-08-30 21:11:21,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2023-08-30 21:11:21,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 8104 transitions. [2023-08-30 21:11:21,891 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48672672672672673 [2023-08-30 21:11:21,891 INFO L72 ComplementDD]: Start complementDD. Operand 75 states and 8104 transitions. [2023-08-30 21:11:21,891 INFO L73 IsDeterministic]: Start isDeterministic. Operand 75 states and 8104 transitions. [2023-08-30 21:11:21,894 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:11:21,895 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 75 states and 8104 transitions. [2023-08-30 21:11:21,902 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 76 states, 75 states have (on average 108.05333333333333) internal successors, (8104), 75 states have internal predecessors, (8104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:11:21,913 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 76 states, 76 states have (on average 222.0) internal successors, (16872), 76 states have internal predecessors, (16872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:11:21,915 INFO L81 ComplementDD]: Finished complementDD. Result has 76 states, 76 states have (on average 222.0) internal successors, (16872), 76 states have internal predecessors, (16872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:11:21,915 INFO L175 Difference]: Start difference. First operand has 169 places, 1477 transitions, 31404 flow. Second operand 75 states and 8104 transitions. [2023-08-30 21:11:21,915 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 7052 transitions, 157459 flow [2023-08-30 21:23:16,838 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 7052 transitions, 151477 flow, removed 2991 selfloop flow, removed 0 redundant places. [2023-08-30 21:23:16,911 INFO L231 Difference]: Finished difference. Result has 294 places, 3946 transitions, 92204 flow [2023-08-30 21:23:16,912 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=222, PETRI_DIFFERENCE_MINUEND_FLOW=29748, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1477, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=694, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=677, PETRI_DIFFERENCE_SUBTRAHEND_STATES=75, PETRI_FLOW=92204, PETRI_PLACES=294, PETRI_TRANSITIONS=3946} [2023-08-30 21:23:16,912 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 256 predicate places. [2023-08-30 21:23:16,912 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 3946 transitions, 92204 flow [2023-08-30 21:23:16,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 99.28571428571429) internal successors, (1390), 14 states have internal predecessors, (1390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:23:16,913 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:23:16,913 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:23:16,918 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-08-30 21:23:17,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-08-30 21:23:17,118 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 2 more)] === [2023-08-30 21:23:17,118 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:23:17,118 INFO L85 PathProgramCache]: Analyzing trace with hash 1895187180, now seen corresponding path program 5 times [2023-08-30 21:23:17,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:23:17,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103373050] [2023-08-30 21:23:17,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:23:17,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:23:17,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:23:17,240 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-30 21:23:17,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:23:17,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103373050] [2023-08-30 21:23:17,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103373050] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:23:17,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179544443] [2023-08-30 21:23:17,241 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 21:23:17,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:23:17,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:23:17,242 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) [2023-08-30 21:23:17,244 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-30 21:23:17,330 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-30 21:23:17,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:23:17,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 21:23:17,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:23:17,372 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 21:23:17,372 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:23:17,418 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 21:23:17,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [179544443] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:23:17,418 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:23:17,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2023-08-30 21:23:17,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184883402] [2023-08-30 21:23:17,418 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:23:17,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-30 21:23:17,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:23:17,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-30 21:23:17,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2023-08-30 21:23:17,554 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 222 [2023-08-30 21:23:17,555 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 3946 transitions, 92204 flow. Second operand has 16 states, 16 states have (on average 98.8125) internal successors, (1581), 16 states have internal predecessors, (1581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:23:17,555 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:23:17,555 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 222 [2023-08-30 21:23:17,555 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Killed by 15