./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/popl20-figure3.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/weaver/popl20-figure3.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 8978d351a1e877bd44e157215d417b40c01c7c886849af3efe046b60ddaacc95 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-31 02:40:00,013 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-31 02:40:00,016 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-31 02:40:00,049 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-31 02:40:00,050 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-31 02:40:00,052 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-31 02:40:00,054 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-31 02:40:00,056 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-31 02:40:00,058 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-31 02:40:00,061 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-31 02:40:00,061 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-31 02:40:00,063 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-31 02:40:00,063 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-31 02:40:00,065 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-31 02:40:00,066 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-31 02:40:00,071 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-31 02:40:00,071 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-31 02:40:00,073 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-31 02:40:00,074 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-31 02:40:00,078 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-31 02:40:00,079 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-31 02:40:00,080 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-31 02:40:00,080 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-31 02:40:00,081 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-31 02:40:00,086 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-31 02:40:00,086 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-31 02:40:00,086 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-31 02:40:00,087 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-31 02:40:00,088 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-31 02:40:00,088 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-31 02:40:00,089 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-31 02:40:00,092 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-31 02:40:00,093 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-31 02:40:00,094 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-31 02:40:00,095 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-31 02:40:00,095 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-31 02:40:00,095 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-31 02:40:00,095 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-31 02:40:00,096 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-31 02:40:00,096 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-31 02:40:00,097 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-31 02:40:00,098 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-31 02:40:00,123 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-31 02:40:00,123 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-31 02:40:00,124 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-31 02:40:00,124 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-31 02:40:00,134 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-31 02:40:00,134 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-31 02:40:00,134 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-31 02:40:00,135 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-31 02:40:00,135 INFO L138 SettingsManager]: * Use SBE=true [2023-08-31 02:40:00,135 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-31 02:40:00,136 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-31 02:40:00,136 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-31 02:40:00,136 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-31 02:40:00,136 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-31 02:40:00,136 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-31 02:40:00,136 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-31 02:40:00,136 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-31 02:40:00,137 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-31 02:40:00,137 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-31 02:40:00,137 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-31 02:40:00,137 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-31 02:40:00,137 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-31 02:40:00,137 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-31 02:40:00,137 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-31 02:40:00,137 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 02:40:00,138 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-31 02:40:00,138 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-31 02:40:00,138 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-31 02:40:00,138 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-31 02:40:00,138 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-31 02:40:00,138 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-31 02:40:00,138 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-31 02:40:00,139 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-31 02:40:00,139 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-31 02:40:00,139 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-31 02:40:00,139 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8978d351a1e877bd44e157215d417b40c01c7c886849af3efe046b60ddaacc95 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-31 02:40:00,378 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-31 02:40:00,393 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-31 02:40:00,394 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-31 02:40:00,395 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-31 02:40:00,395 INFO L275 PluginConnector]: CDTParser initialized [2023-08-31 02:40:00,396 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-figure3.wvr.c [2023-08-31 02:40:01,299 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-31 02:40:01,446 INFO L351 CDTParser]: Found 1 translation units. [2023-08-31 02:40:01,447 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-figure3.wvr.c [2023-08-31 02:40:01,452 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d6cb1019c/0376f7dfd5ff479ba94b10dfc3fcac73/FLAG154f89ccb [2023-08-31 02:40:01,465 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d6cb1019c/0376f7dfd5ff479ba94b10dfc3fcac73 [2023-08-31 02:40:01,467 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-31 02:40:01,467 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-31 02:40:01,469 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-31 02:40:01,469 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-31 02:40:01,471 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-31 02:40:01,472 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 02:40:01" (1/1) ... [2023-08-31 02:40:01,472 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@10154920 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 02:40:01, skipping insertion in model container [2023-08-31 02:40:01,472 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 02:40:01" (1/1) ... [2023-08-31 02:40:01,477 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-31 02:40:01,487 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-31 02:40:01,611 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-figure3.wvr.c[2121,2134] [2023-08-31 02:40:01,614 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 02:40:01,625 INFO L203 MainTranslator]: Completed pre-run [2023-08-31 02:40:01,650 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-figure3.wvr.c[2121,2134] [2023-08-31 02:40:01,653 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 02:40:01,659 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-31 02:40:01,659 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-31 02:40:01,663 INFO L208 MainTranslator]: Completed translation [2023-08-31 02:40:01,664 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 02:40:01 WrapperNode [2023-08-31 02:40:01,664 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-31 02:40:01,665 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-31 02:40:01,665 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-31 02:40:01,665 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-31 02:40:01,669 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 02:40:01" (1/1) ... [2023-08-31 02:40:01,677 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 02:40:01" (1/1) ... [2023-08-31 02:40:01,696 INFO L138 Inliner]: procedures = 21, calls = 25, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 74 [2023-08-31 02:40:01,696 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-31 02:40:01,697 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-31 02:40:01,698 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-31 02:40:01,698 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-31 02:40:01,704 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 02:40:01" (1/1) ... [2023-08-31 02:40:01,704 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 02:40:01" (1/1) ... [2023-08-31 02:40:01,712 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 02:40:01" (1/1) ... [2023-08-31 02:40:01,716 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 02:40:01" (1/1) ... [2023-08-31 02:40:01,727 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 02:40:01" (1/1) ... [2023-08-31 02:40:01,731 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 02:40:01" (1/1) ... [2023-08-31 02:40:01,736 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 02:40:01" (1/1) ... [2023-08-31 02:40:01,737 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 02:40:01" (1/1) ... [2023-08-31 02:40:01,738 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-31 02:40:01,739 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-31 02:40:01,740 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-31 02:40:01,740 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-31 02:40:01,741 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 02:40:01" (1/1) ... [2023-08-31 02:40:01,744 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 02:40:01,752 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:40:01,761 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-31 02:40:01,780 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-31 02:40:01,793 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-31 02:40:01,793 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-31 02:40:01,794 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-31 02:40:01,794 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-31 02:40:01,794 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-31 02:40:01,794 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-31 02:40:01,794 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-31 02:40:01,795 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-31 02:40:01,795 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-31 02:40:01,795 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-31 02:40:01,795 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-31 02:40:01,795 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-31 02:40:01,795 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-31 02:40:01,795 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-31 02:40:01,797 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-31 02:40:01,924 INFO L236 CfgBuilder]: Building ICFG [2023-08-31 02:40:01,926 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-31 02:40:02,099 INFO L277 CfgBuilder]: Performing block encoding [2023-08-31 02:40:02,115 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-31 02:40:02,115 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-08-31 02:40:02,117 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 02:40:02 BoogieIcfgContainer [2023-08-31 02:40:02,117 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-31 02:40:02,119 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-31 02:40:02,120 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-31 02:40:02,122 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-31 02:40:02,122 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.08 02:40:01" (1/3) ... [2023-08-31 02:40:02,122 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16ac5ea8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 02:40:02, skipping insertion in model container [2023-08-31 02:40:02,122 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 02:40:01" (2/3) ... [2023-08-31 02:40:02,123 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16ac5ea8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 02:40:02, skipping insertion in model container [2023-08-31 02:40:02,123 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 02:40:02" (3/3) ... [2023-08-31 02:40:02,124 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-figure3.wvr.c [2023-08-31 02:40:02,134 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-31 02:40:02,140 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-31 02:40:02,140 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-31 02:40:02,140 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-31 02:40:02,205 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-31 02:40:02,230 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 83 places, 82 transitions, 180 flow [2023-08-31 02:40:02,256 INFO L130 PetriNetUnfolder]: 6/80 cut-off events. [2023-08-31 02:40:02,256 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-31 02:40:02,259 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89 conditions, 80 events. 6/80 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 49 event pairs, 0 based on Foata normal form. 0/73 useless extension candidates. Maximal degree in co-relation 47. Up to 2 conditions per place. [2023-08-31 02:40:02,259 INFO L82 GeneralOperation]: Start removeDead. Operand has 83 places, 82 transitions, 180 flow [2023-08-31 02:40:02,262 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 73 places, 72 transitions, 156 flow [2023-08-31 02:40:02,264 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 02:40:02,269 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 73 places, 72 transitions, 156 flow [2023-08-31 02:40:02,271 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 73 places, 72 transitions, 156 flow [2023-08-31 02:40:02,271 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 73 places, 72 transitions, 156 flow [2023-08-31 02:40:02,283 INFO L130 PetriNetUnfolder]: 6/72 cut-off events. [2023-08-31 02:40:02,283 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-31 02:40:02,284 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81 conditions, 72 events. 6/72 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 48 event pairs, 0 based on Foata normal form. 0/66 useless extension candidates. Maximal degree in co-relation 47. Up to 2 conditions per place. [2023-08-31 02:40:02,284 INFO L119 LiptonReduction]: Number of co-enabled transitions 500 [2023-08-31 02:40:03,848 INFO L134 LiptonReduction]: Checked pairs total: 583 [2023-08-31 02:40:03,849 INFO L136 LiptonReduction]: Total number of compositions: 69 [2023-08-31 02:40:03,863 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-31 02:40:03,868 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;@70e249c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 02:40:03,868 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-31 02:40:03,877 INFO L130 PetriNetUnfolder]: 2/14 cut-off events. [2023-08-31 02:40:03,877 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-31 02:40:03,877 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:40:03,878 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:40:03,878 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 02:40:03,882 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:40:03,882 INFO L85 PathProgramCache]: Analyzing trace with hash -1436261647, now seen corresponding path program 1 times [2023-08-31 02:40:03,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:40:03,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975954417] [2023-08-31 02:40:03,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:40:03,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:40:03,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:40:04,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:40:04,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:40:04,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975954417] [2023-08-31 02:40:04,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975954417] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 02:40:04,197 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 02:40:04,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-31 02:40:04,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672122029] [2023-08-31 02:40:04,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 02:40:04,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 02:40:04,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:40:04,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 02:40:04,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 02:40:04,230 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 151 [2023-08-31 02:40:04,232 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 15 transitions, 42 flow. Second operand has 3 states, 3 states have (on average 73.66666666666667) internal successors, (221), 3 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:40:04,233 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:40:04,233 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 151 [2023-08-31 02:40:04,234 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:40:04,288 INFO L130 PetriNetUnfolder]: 49/94 cut-off events. [2023-08-31 02:40:04,288 INFO L131 PetriNetUnfolder]: For 11/11 co-relation queries the response was YES. [2023-08-31 02:40:04,289 INFO L83 FinitePrefix]: Finished finitePrefix Result has 206 conditions, 94 events. 49/94 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 271 event pairs, 13 based on Foata normal form. 1/69 useless extension candidates. Maximal degree in co-relation 143. Up to 65 conditions per place. [2023-08-31 02:40:04,291 INFO L137 encePairwiseOnDemand]: 147/151 looper letters, 16 selfloop transitions, 2 changer transitions 4/24 dead transitions. [2023-08-31 02:40:04,291 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 24 transitions, 113 flow [2023-08-31 02:40:04,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 02:40:04,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 02:40:04,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 234 transitions. [2023-08-31 02:40:04,304 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5165562913907285 [2023-08-31 02:40:04,304 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 234 transitions. [2023-08-31 02:40:04,305 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 234 transitions. [2023-08-31 02:40:04,306 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:40:04,308 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 234 transitions. [2023-08-31 02:40:04,311 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 78.0) internal successors, (234), 3 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:40:04,314 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 151.0) internal successors, (604), 4 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:40:04,314 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 151.0) internal successors, (604), 4 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:40:04,315 INFO L175 Difference]: Start difference. First operand has 20 places, 15 transitions, 42 flow. Second operand 3 states and 234 transitions. [2023-08-31 02:40:04,316 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 24 transitions, 113 flow [2023-08-31 02:40:04,317 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 18 places, 24 transitions, 99 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-31 02:40:04,318 INFO L231 Difference]: Finished difference. Result has 19 places, 16 transitions, 48 flow [2023-08-31 02:40:04,319 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=34, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=48, PETRI_PLACES=19, PETRI_TRANSITIONS=16} [2023-08-31 02:40:04,322 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, -1 predicate places. [2023-08-31 02:40:04,322 INFO L495 AbstractCegarLoop]: Abstraction has has 19 places, 16 transitions, 48 flow [2023-08-31 02:40:04,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 73.66666666666667) internal successors, (221), 3 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:40:04,322 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:40:04,323 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:40:04,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-31 02:40:04,325 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 02:40:04,331 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:40:04,331 INFO L85 PathProgramCache]: Analyzing trace with hash 1046577200, now seen corresponding path program 1 times [2023-08-31 02:40:04,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:40:04,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891605986] [2023-08-31 02:40:04,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:40:04,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:40:04,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:40:04,468 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:40:04,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:40:04,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891605986] [2023-08-31 02:40:04,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891605986] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 02:40:04,469 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 02:40:04,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-31 02:40:04,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520647938] [2023-08-31 02:40:04,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 02:40:04,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-31 02:40:04,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:40:04,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-31 02:40:04,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-31 02:40:04,497 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 151 [2023-08-31 02:40:04,497 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 19 places, 16 transitions, 48 flow. Second operand has 5 states, 5 states have (on average 65.8) internal successors, (329), 5 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:40:04,497 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:40:04,497 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 151 [2023-08-31 02:40:04,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:40:04,587 INFO L130 PetriNetUnfolder]: 72/149 cut-off events. [2023-08-31 02:40:04,587 INFO L131 PetriNetUnfolder]: For 25/25 co-relation queries the response was YES. [2023-08-31 02:40:04,588 INFO L83 FinitePrefix]: Finished finitePrefix Result has 345 conditions, 149 events. 72/149 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 459 event pairs, 24 based on Foata normal form. 6/155 useless extension candidates. Maximal degree in co-relation 177. Up to 78 conditions per place. [2023-08-31 02:40:04,588 INFO L137 encePairwiseOnDemand]: 146/151 looper letters, 28 selfloop transitions, 3 changer transitions 6/37 dead transitions. [2023-08-31 02:40:04,588 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 37 transitions, 178 flow [2023-08-31 02:40:04,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-31 02:40:04,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-31 02:40:04,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 352 transitions. [2023-08-31 02:40:04,592 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46622516556291393 [2023-08-31 02:40:04,592 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 352 transitions. [2023-08-31 02:40:04,593 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 352 transitions. [2023-08-31 02:40:04,593 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:40:04,593 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 352 transitions. [2023-08-31 02:40:04,594 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 70.4) internal successors, (352), 5 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:40:04,597 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 151.0) internal successors, (906), 6 states have internal predecessors, (906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:40:04,597 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 151.0) internal successors, (906), 6 states have internal predecessors, (906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:40:04,597 INFO L175 Difference]: Start difference. First operand has 19 places, 16 transitions, 48 flow. Second operand 5 states and 352 transitions. [2023-08-31 02:40:04,597 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 37 transitions, 178 flow [2023-08-31 02:40:04,599 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 37 transitions, 175 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-31 02:40:04,599 INFO L231 Difference]: Finished difference. Result has 25 places, 18 transitions, 74 flow [2023-08-31 02:40:04,600 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=74, PETRI_PLACES=25, PETRI_TRANSITIONS=18} [2023-08-31 02:40:04,600 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 5 predicate places. [2023-08-31 02:40:04,600 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 18 transitions, 74 flow [2023-08-31 02:40:04,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 65.8) internal successors, (329), 5 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:40:04,601 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:40:04,601 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:40:04,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-31 02:40:04,601 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 02:40:04,601 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:40:04,602 INFO L85 PathProgramCache]: Analyzing trace with hash 1397973902, now seen corresponding path program 2 times [2023-08-31 02:40:04,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:40:04,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707992062] [2023-08-31 02:40:04,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:40:04,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:40:04,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:40:04,683 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:40:04,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:40:04,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707992062] [2023-08-31 02:40:04,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707992062] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:40:04,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78671154] [2023-08-31 02:40:04,683 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 02:40:04,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:40:04,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:40:04,686 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 02:40:04,717 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-31 02:40:04,745 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 02:40:04,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 02:40:04,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-31 02:40:04,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:40:04,835 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:40:04,835 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:40:04,893 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:40:04,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [78671154] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-31 02:40:04,893 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-31 02:40:04,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 5] total 6 [2023-08-31 02:40:04,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061009320] [2023-08-31 02:40:04,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 02:40:04,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-31 02:40:04,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:40:04,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-31 02:40:04,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-08-31 02:40:04,906 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 151 [2023-08-31 02:40:04,906 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 18 transitions, 74 flow. Second operand has 4 states, 4 states have (on average 68.25) internal successors, (273), 4 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:40:04,906 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:40:04,906 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 151 [2023-08-31 02:40:04,906 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:40:04,951 INFO L130 PetriNetUnfolder]: 72/143 cut-off events. [2023-08-31 02:40:04,951 INFO L131 PetriNetUnfolder]: For 131/135 co-relation queries the response was YES. [2023-08-31 02:40:04,952 INFO L83 FinitePrefix]: Finished finitePrefix Result has 437 conditions, 143 events. 72/143 cut-off events. For 131/135 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 442 event pairs, 28 based on Foata normal form. 6/145 useless extension candidates. Maximal degree in co-relation 112. Up to 86 conditions per place. [2023-08-31 02:40:04,953 INFO L137 encePairwiseOnDemand]: 147/151 looper letters, 24 selfloop transitions, 3 changer transitions 5/33 dead transitions. [2023-08-31 02:40:04,953 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 33 transitions, 188 flow [2023-08-31 02:40:04,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-31 02:40:04,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-31 02:40:04,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 291 transitions. [2023-08-31 02:40:04,954 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4817880794701987 [2023-08-31 02:40:04,954 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 291 transitions. [2023-08-31 02:40:04,954 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 291 transitions. [2023-08-31 02:40:04,954 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:40:04,954 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 291 transitions. [2023-08-31 02:40:04,955 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 72.75) internal successors, (291), 4 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:40:04,955 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 151.0) internal successors, (755), 5 states have internal predecessors, (755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:40:04,956 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 151.0) internal successors, (755), 5 states have internal predecessors, (755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:40:04,956 INFO L175 Difference]: Start difference. First operand has 25 places, 18 transitions, 74 flow. Second operand 4 states and 291 transitions. [2023-08-31 02:40:04,956 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 33 transitions, 188 flow [2023-08-31 02:40:04,957 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 33 transitions, 178 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-08-31 02:40:04,957 INFO L231 Difference]: Finished difference. Result has 27 places, 20 transitions, 93 flow [2023-08-31 02:40:04,957 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=93, PETRI_PLACES=27, PETRI_TRANSITIONS=20} [2023-08-31 02:40:04,958 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 7 predicate places. [2023-08-31 02:40:04,958 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 20 transitions, 93 flow [2023-08-31 02:40:04,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 68.25) internal successors, (273), 4 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:40:04,958 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:40:04,958 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:40:04,967 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-31 02:40:05,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:40:05,163 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 02:40:05,164 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:40:05,164 INFO L85 PathProgramCache]: Analyzing trace with hash -1096485560, now seen corresponding path program 3 times [2023-08-31 02:40:05,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:40:05,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677304076] [2023-08-31 02:40:05,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:40:05,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:40:05,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:40:05,234 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:40:05,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:40:05,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677304076] [2023-08-31 02:40:05,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677304076] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:40:05,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896549164] [2023-08-31 02:40:05,236 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 02:40:05,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:40:05,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:40:05,237 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 02:40:05,265 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-31 02:40:05,291 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-31 02:40:05,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 02:40:05,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-31 02:40:05,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:40:05,362 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:40:05,362 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:40:05,397 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:40:05,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [896549164] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:40:05,401 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:40:05,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 7 [2023-08-31 02:40:05,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689418713] [2023-08-31 02:40:05,401 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:40:05,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-31 02:40:05,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:40:05,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-31 02:40:05,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-08-31 02:40:05,431 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 151 [2023-08-31 02:40:05,432 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 20 transitions, 93 flow. Second operand has 7 states, 7 states have (on average 65.14285714285714) internal successors, (456), 7 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:40:05,432 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:40:05,432 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 151 [2023-08-31 02:40:05,432 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:40:05,544 INFO L130 PetriNetUnfolder]: 102/203 cut-off events. [2023-08-31 02:40:05,544 INFO L131 PetriNetUnfolder]: For 289/289 co-relation queries the response was YES. [2023-08-31 02:40:05,545 INFO L83 FinitePrefix]: Finished finitePrefix Result has 657 conditions, 203 events. 102/203 cut-off events. For 289/289 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 705 event pairs, 30 based on Foata normal form. 6/209 useless extension candidates. Maximal degree in co-relation 237. Up to 104 conditions per place. [2023-08-31 02:40:05,546 INFO L137 encePairwiseOnDemand]: 146/151 looper letters, 33 selfloop transitions, 11 changer transitions 11/55 dead transitions. [2023-08-31 02:40:05,546 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 55 transitions, 334 flow [2023-08-31 02:40:05,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-31 02:40:05,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-31 02:40:05,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 487 transitions. [2023-08-31 02:40:05,549 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4607379375591296 [2023-08-31 02:40:05,549 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 487 transitions. [2023-08-31 02:40:05,549 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 487 transitions. [2023-08-31 02:40:05,549 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:40:05,549 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 487 transitions. [2023-08-31 02:40:05,550 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 69.57142857142857) internal successors, (487), 7 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:40:05,551 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 151.0) internal successors, (1208), 8 states have internal predecessors, (1208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:40:05,552 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 151.0) internal successors, (1208), 8 states have internal predecessors, (1208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:40:05,552 INFO L175 Difference]: Start difference. First operand has 27 places, 20 transitions, 93 flow. Second operand 7 states and 487 transitions. [2023-08-31 02:40:05,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 55 transitions, 334 flow [2023-08-31 02:40:05,556 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 55 transitions, 332 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-31 02:40:05,557 INFO L231 Difference]: Finished difference. Result has 34 places, 26 transitions, 165 flow [2023-08-31 02:40:05,557 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=165, PETRI_PLACES=34, PETRI_TRANSITIONS=26} [2023-08-31 02:40:05,558 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 14 predicate places. [2023-08-31 02:40:05,558 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 26 transitions, 165 flow [2023-08-31 02:40:05,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 65.14285714285714) internal successors, (456), 7 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:40:05,559 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:40:05,559 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:40:05,580 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-31 02:40:05,764 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,SelfDestructingSolverStorable3 [2023-08-31 02:40:05,764 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 02:40:05,765 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:40:05,765 INFO L85 PathProgramCache]: Analyzing trace with hash -39967956, now seen corresponding path program 4 times [2023-08-31 02:40:05,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:40:05,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011590859] [2023-08-31 02:40:05,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:40:05,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:40:05,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:40:05,823 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:40:05,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:40:05,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011590859] [2023-08-31 02:40:05,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011590859] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:40:05,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631605257] [2023-08-31 02:40:05,824 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-31 02:40:05,824 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:40:05,824 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:40:05,829 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 02:40:05,831 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-31 02:40:05,877 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-31 02:40:05,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 02:40:05,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-31 02:40:05,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:40:05,914 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:40:05,914 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:40:05,963 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:40:05,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [631605257] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:40:05,964 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:40:05,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-08-31 02:40:05,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169997242] [2023-08-31 02:40:05,965 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:40:05,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-31 02:40:05,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:40:05,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-31 02:40:05,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-08-31 02:40:06,002 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 151 [2023-08-31 02:40:06,003 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 26 transitions, 165 flow. Second operand has 8 states, 8 states have (on average 64.5) internal successors, (516), 8 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:40:06,003 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:40:06,003 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 151 [2023-08-31 02:40:06,003 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:40:06,074 INFO L130 PetriNetUnfolder]: 96/189 cut-off events. [2023-08-31 02:40:06,074 INFO L131 PetriNetUnfolder]: For 447/447 co-relation queries the response was YES. [2023-08-31 02:40:06,076 INFO L83 FinitePrefix]: Finished finitePrefix Result has 710 conditions, 189 events. 96/189 cut-off events. For 447/447 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 629 event pairs, 28 based on Foata normal form. 6/195 useless extension candidates. Maximal degree in co-relation 486. Up to 96 conditions per place. [2023-08-31 02:40:06,078 INFO L137 encePairwiseOnDemand]: 146/151 looper letters, 25 selfloop transitions, 11 changer transitions 7/43 dead transitions. [2023-08-31 02:40:06,078 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 43 transitions, 312 flow [2023-08-31 02:40:06,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-31 02:40:06,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-31 02:40:06,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 348 transitions. [2023-08-31 02:40:06,079 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4609271523178808 [2023-08-31 02:40:06,079 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 348 transitions. [2023-08-31 02:40:06,079 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 348 transitions. [2023-08-31 02:40:06,079 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:40:06,079 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 348 transitions. [2023-08-31 02:40:06,080 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 69.6) internal successors, (348), 5 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:40:06,081 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 151.0) internal successors, (906), 6 states have internal predecessors, (906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:40:06,081 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 151.0) internal successors, (906), 6 states have internal predecessors, (906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:40:06,081 INFO L175 Difference]: Start difference. First operand has 34 places, 26 transitions, 165 flow. Second operand 5 states and 348 transitions. [2023-08-31 02:40:06,081 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 43 transitions, 312 flow [2023-08-31 02:40:06,083 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 43 transitions, 298 flow, removed 5 selfloop flow, removed 1 redundant places. [2023-08-31 02:40:06,084 INFO L231 Difference]: Finished difference. Result has 38 places, 26 transitions, 179 flow [2023-08-31 02:40:06,084 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=179, PETRI_PLACES=38, PETRI_TRANSITIONS=26} [2023-08-31 02:40:06,086 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 18 predicate places. [2023-08-31 02:40:06,086 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 26 transitions, 179 flow [2023-08-31 02:40:06,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 64.5) internal successors, (516), 8 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:40:06,086 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:40:06,086 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:40:06,093 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-31 02:40:06,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:40:06,291 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 02:40:06,291 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:40:06,291 INFO L85 PathProgramCache]: Analyzing trace with hash -323427280, now seen corresponding path program 1 times [2023-08-31 02:40:06,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:40:06,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033430315] [2023-08-31 02:40:06,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:40:06,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:40:06,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:40:06,389 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:40:06,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:40:06,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033430315] [2023-08-31 02:40:06,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033430315] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:40:06,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079332067] [2023-08-31 02:40:06,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:40:06,389 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:40:06,389 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:40:06,390 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 02:40:06,392 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-31 02:40:06,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:40:06,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-31 02:40:06,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:40:06,474 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:40:06,474 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:40:06,511 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:40:06,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2079332067] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:40:06,511 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:40:06,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 2, 2] total 4 [2023-08-31 02:40:06,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764428428] [2023-08-31 02:40:06,512 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:40:06,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-31 02:40:06,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:40:06,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-31 02:40:06,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-08-31 02:40:06,528 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 151 [2023-08-31 02:40:06,528 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 26 transitions, 179 flow. Second operand has 6 states, 6 states have (on average 72.5) internal successors, (435), 6 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:40:06,528 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:40:06,528 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 151 [2023-08-31 02:40:06,528 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:40:06,576 INFO L130 PetriNetUnfolder]: 122/237 cut-off events. [2023-08-31 02:40:06,576 INFO L131 PetriNetUnfolder]: For 493/512 co-relation queries the response was YES. [2023-08-31 02:40:06,577 INFO L83 FinitePrefix]: Finished finitePrefix Result has 880 conditions, 237 events. 122/237 cut-off events. For 493/512 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 861 event pairs, 20 based on Foata normal form. 19/247 useless extension candidates. Maximal degree in co-relation 670. Up to 111 conditions per place. [2023-08-31 02:40:06,578 INFO L137 encePairwiseOnDemand]: 147/151 looper letters, 30 selfloop transitions, 11 changer transitions 4/50 dead transitions. [2023-08-31 02:40:06,578 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 50 transitions, 374 flow [2023-08-31 02:40:06,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-31 02:40:06,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-31 02:40:06,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 307 transitions. [2023-08-31 02:40:06,579 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5082781456953642 [2023-08-31 02:40:06,579 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 307 transitions. [2023-08-31 02:40:06,579 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 307 transitions. [2023-08-31 02:40:06,579 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:40:06,579 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 307 transitions. [2023-08-31 02:40:06,580 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 76.75) internal successors, (307), 4 states have internal predecessors, (307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:40:06,581 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 151.0) internal successors, (755), 5 states have internal predecessors, (755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:40:06,581 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 151.0) internal successors, (755), 5 states have internal predecessors, (755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:40:06,581 INFO L175 Difference]: Start difference. First operand has 38 places, 26 transitions, 179 flow. Second operand 4 states and 307 transitions. [2023-08-31 02:40:06,581 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 50 transitions, 374 flow [2023-08-31 02:40:06,582 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 50 transitions, 331 flow, removed 7 selfloop flow, removed 4 redundant places. [2023-08-31 02:40:06,583 INFO L231 Difference]: Finished difference. Result has 38 places, 33 transitions, 254 flow [2023-08-31 02:40:06,583 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=254, PETRI_PLACES=38, PETRI_TRANSITIONS=33} [2023-08-31 02:40:06,583 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 18 predicate places. [2023-08-31 02:40:06,584 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 33 transitions, 254 flow [2023-08-31 02:40:06,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 72.5) internal successors, (435), 6 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:40:06,584 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:40:06,584 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:40:06,591 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-31 02:40:06,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:40:06,789 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 02:40:06,789 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:40:06,789 INFO L85 PathProgramCache]: Analyzing trace with hash 1179339409, now seen corresponding path program 2 times [2023-08-31 02:40:06,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:40:06,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482754619] [2023-08-31 02:40:06,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:40:06,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:40:06,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:40:06,881 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:40:06,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:40:06,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482754619] [2023-08-31 02:40:06,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482754619] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:40:06,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172443868] [2023-08-31 02:40:06,886 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 02:40:06,886 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:40:06,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:40:06,887 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 02:40:06,890 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-31 02:40:06,941 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 02:40:06,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 02:40:06,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-31 02:40:06,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:40:06,990 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:40:06,990 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:40:07,041 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:40:07,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [172443868] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:40:07,042 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:40:07,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 12 [2023-08-31 02:40:07,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999386656] [2023-08-31 02:40:07,042 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:40:07,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-31 02:40:07,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:40:07,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-31 02:40:07,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2023-08-31 02:40:07,082 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 151 [2023-08-31 02:40:07,082 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 33 transitions, 254 flow. Second operand has 12 states, 12 states have (on average 64.66666666666667) internal successors, (776), 12 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:40:07,083 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:40:07,083 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 151 [2023-08-31 02:40:07,083 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:40:07,353 INFO L130 PetriNetUnfolder]: 265/503 cut-off events. [2023-08-31 02:40:07,353 INFO L131 PetriNetUnfolder]: For 1086/1086 co-relation queries the response was YES. [2023-08-31 02:40:07,354 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1932 conditions, 503 events. 265/503 cut-off events. For 1086/1086 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 2160 event pairs, 41 based on Foata normal form. 12/515 useless extension candidates. Maximal degree in co-relation 1607. Up to 185 conditions per place. [2023-08-31 02:40:07,356 INFO L137 encePairwiseOnDemand]: 146/151 looper letters, 68 selfloop transitions, 20 changer transitions 7/95 dead transitions. [2023-08-31 02:40:07,356 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 95 transitions, 738 flow [2023-08-31 02:40:07,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-31 02:40:07,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-31 02:40:07,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 696 transitions. [2023-08-31 02:40:07,358 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4609271523178808 [2023-08-31 02:40:07,358 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 696 transitions. [2023-08-31 02:40:07,358 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 696 transitions. [2023-08-31 02:40:07,358 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:40:07,358 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 696 transitions. [2023-08-31 02:40:07,359 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 69.6) internal successors, (696), 10 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:40:07,361 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 151.0) internal successors, (1661), 11 states have internal predecessors, (1661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:40:07,361 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 151.0) internal successors, (1661), 11 states have internal predecessors, (1661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:40:07,361 INFO L175 Difference]: Start difference. First operand has 38 places, 33 transitions, 254 flow. Second operand 10 states and 696 transitions. [2023-08-31 02:40:07,361 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 95 transitions, 738 flow [2023-08-31 02:40:07,363 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 95 transitions, 720 flow, removed 9 selfloop flow, removed 0 redundant places. [2023-08-31 02:40:07,364 INFO L231 Difference]: Finished difference. Result has 52 places, 46 transitions, 448 flow [2023-08-31 02:40:07,364 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=242, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=448, PETRI_PLACES=52, PETRI_TRANSITIONS=46} [2023-08-31 02:40:07,365 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 32 predicate places. [2023-08-31 02:40:07,365 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 46 transitions, 448 flow [2023-08-31 02:40:07,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 64.66666666666667) internal successors, (776), 12 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:40:07,365 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:40:07,365 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:40:07,372 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-08-31 02:40:07,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:40:07,570 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 02:40:07,570 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:40:07,571 INFO L85 PathProgramCache]: Analyzing trace with hash 1524658179, now seen corresponding path program 3 times [2023-08-31 02:40:07,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:40:07,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367716090] [2023-08-31 02:40:07,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:40:07,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:40:07,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:40:07,677 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:40:07,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:40:07,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367716090] [2023-08-31 02:40:07,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367716090] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:40:07,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003581934] [2023-08-31 02:40:07,677 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 02:40:07,678 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:40:07,678 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:40:07,678 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 02:40:07,680 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-31 02:40:07,727 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-31 02:40:07,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 02:40:07,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-31 02:40:07,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:40:07,778 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:40:07,778 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:40:07,843 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:40:07,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2003581934] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:40:07,844 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:40:07,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 14 [2023-08-31 02:40:07,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111922721] [2023-08-31 02:40:07,844 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:40:07,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-31 02:40:07,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:40:07,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-31 02:40:07,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2023-08-31 02:40:07,891 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 151 [2023-08-31 02:40:07,892 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 46 transitions, 448 flow. Second operand has 14 states, 14 states have (on average 64.21428571428571) internal successors, (899), 14 states have internal predecessors, (899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:40:07,892 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:40:07,892 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 151 [2023-08-31 02:40:07,892 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:40:08,342 INFO L130 PetriNetUnfolder]: 335/629 cut-off events. [2023-08-31 02:40:08,343 INFO L131 PetriNetUnfolder]: For 2648/2648 co-relation queries the response was YES. [2023-08-31 02:40:08,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2888 conditions, 629 events. 335/629 cut-off events. For 2648/2648 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 2877 event pairs, 45 based on Foata normal form. 38/667 useless extension candidates. Maximal degree in co-relation 2424. Up to 209 conditions per place. [2023-08-31 02:40:08,346 INFO L137 encePairwiseOnDemand]: 145/151 looper letters, 90 selfloop transitions, 40 changer transitions 10/140 dead transitions. [2023-08-31 02:40:08,346 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 140 transitions, 1179 flow [2023-08-31 02:40:08,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-31 02:40:08,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-31 02:40:08,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1241 transitions. [2023-08-31 02:40:08,349 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4565857247976453 [2023-08-31 02:40:08,349 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1241 transitions. [2023-08-31 02:40:08,349 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1241 transitions. [2023-08-31 02:40:08,350 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:40:08,350 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1241 transitions. [2023-08-31 02:40:08,352 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 68.94444444444444) internal successors, (1241), 18 states have internal predecessors, (1241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:40:08,354 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 151.0) internal successors, (2869), 19 states have internal predecessors, (2869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:40:08,354 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 151.0) internal successors, (2869), 19 states have internal predecessors, (2869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:40:08,355 INFO L175 Difference]: Start difference. First operand has 52 places, 46 transitions, 448 flow. Second operand 18 states and 1241 transitions. [2023-08-31 02:40:08,355 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 140 transitions, 1179 flow [2023-08-31 02:40:08,359 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 140 transitions, 1104 flow, removed 34 selfloop flow, removed 2 redundant places. [2023-08-31 02:40:08,360 INFO L231 Difference]: Finished difference. Result has 74 places, 65 transitions, 725 flow [2023-08-31 02:40:08,360 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=401, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=725, PETRI_PLACES=74, PETRI_TRANSITIONS=65} [2023-08-31 02:40:08,361 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 54 predicate places. [2023-08-31 02:40:08,361 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 65 transitions, 725 flow [2023-08-31 02:40:08,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 64.21428571428571) internal successors, (899), 14 states have internal predecessors, (899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:40:08,361 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:40:08,362 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:40:08,370 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-31 02:40:08,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:40:08,571 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 02:40:08,571 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:40:08,572 INFO L85 PathProgramCache]: Analyzing trace with hash -1900702783, now seen corresponding path program 4 times [2023-08-31 02:40:08,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:40:08,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435181233] [2023-08-31 02:40:08,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:40:08,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:40:08,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:40:08,668 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:40:08,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:40:08,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435181233] [2023-08-31 02:40:08,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435181233] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:40:08,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690066618] [2023-08-31 02:40:08,668 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-31 02:40:08,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:40:08,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:40:08,670 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 02:40:08,672 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-31 02:40:08,727 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-31 02:40:08,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 02:40:08,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-31 02:40:08,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:40:08,769 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:40:08,769 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:40:08,821 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:40:08,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [690066618] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:40:08,822 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:40:08,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 14 [2023-08-31 02:40:08,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899233254] [2023-08-31 02:40:08,822 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:40:08,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-31 02:40:08,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:40:08,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-31 02:40:08,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2023-08-31 02:40:08,876 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 151 [2023-08-31 02:40:08,877 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 65 transitions, 725 flow. Second operand has 14 states, 14 states have (on average 63.92857142857143) internal successors, (895), 14 states have internal predecessors, (895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:40:08,877 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:40:08,877 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 151 [2023-08-31 02:40:08,877 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:40:09,525 INFO L130 PetriNetUnfolder]: 469/939 cut-off events. [2023-08-31 02:40:09,525 INFO L131 PetriNetUnfolder]: For 8851/8851 co-relation queries the response was YES. [2023-08-31 02:40:09,527 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5444 conditions, 939 events. 469/939 cut-off events. For 8851/8851 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 5117 event pairs, 10 based on Foata normal form. 16/955 useless extension candidates. Maximal degree in co-relation 4818. Up to 293 conditions per place. [2023-08-31 02:40:09,531 INFO L137 encePairwiseOnDemand]: 145/151 looper letters, 121 selfloop transitions, 91 changer transitions 44/256 dead transitions. [2023-08-31 02:40:09,531 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 256 transitions, 2777 flow [2023-08-31 02:40:09,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-08-31 02:40:09,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-08-31 02:40:09,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 2174 transitions. [2023-08-31 02:40:09,535 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44991721854304634 [2023-08-31 02:40:09,535 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 2174 transitions. [2023-08-31 02:40:09,535 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 2174 transitions. [2023-08-31 02:40:09,536 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:40:09,536 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 2174 transitions. [2023-08-31 02:40:09,539 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 67.9375) internal successors, (2174), 32 states have internal predecessors, (2174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:40:09,554 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 151.0) internal successors, (4983), 33 states have internal predecessors, (4983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:40:09,555 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 151.0) internal successors, (4983), 33 states have internal predecessors, (4983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:40:09,555 INFO L175 Difference]: Start difference. First operand has 74 places, 65 transitions, 725 flow. Second operand 32 states and 2174 transitions. [2023-08-31 02:40:09,555 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 256 transitions, 2777 flow [2023-08-31 02:40:09,574 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 256 transitions, 2456 flow, removed 124 selfloop flow, removed 8 redundant places. [2023-08-31 02:40:09,576 INFO L231 Difference]: Finished difference. Result has 108 places, 127 transitions, 1544 flow [2023-08-31 02:40:09,577 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=543, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=1544, PETRI_PLACES=108, PETRI_TRANSITIONS=127} [2023-08-31 02:40:09,577 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 88 predicate places. [2023-08-31 02:40:09,577 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 127 transitions, 1544 flow [2023-08-31 02:40:09,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 63.92857142857143) internal successors, (895), 14 states have internal predecessors, (895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:40:09,578 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:40:09,578 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:40:09,584 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-31 02:40:09,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:40:09,783 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 02:40:09,783 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:40:09,783 INFO L85 PathProgramCache]: Analyzing trace with hash -1874186445, now seen corresponding path program 5 times [2023-08-31 02:40:09,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:40:09,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480183023] [2023-08-31 02:40:09,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:40:09,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:40:09,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:40:09,863 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:40:09,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:40:09,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480183023] [2023-08-31 02:40:09,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480183023] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:40:09,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783994626] [2023-08-31 02:40:09,864 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-31 02:40:09,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:40:09,864 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:40:09,865 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 02:40:09,896 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-31 02:40:09,920 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 02:40:09,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 02:40:09,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-31 02:40:09,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:40:09,958 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:40:09,958 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:40:10,007 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:40:10,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [783994626] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:40:10,007 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:40:10,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 15 [2023-08-31 02:40:10,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211529141] [2023-08-31 02:40:10,008 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:40:10,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-31 02:40:10,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:40:10,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-31 02:40:10,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2023-08-31 02:40:10,051 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 151 [2023-08-31 02:40:10,052 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 127 transitions, 1544 flow. Second operand has 15 states, 15 states have (on average 64.0) internal successors, (960), 15 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:40:10,052 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:40:10,052 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 151 [2023-08-31 02:40:10,052 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:40:10,481 INFO L130 PetriNetUnfolder]: 405/798 cut-off events. [2023-08-31 02:40:10,481 INFO L131 PetriNetUnfolder]: For 13818/13818 co-relation queries the response was YES. [2023-08-31 02:40:10,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5309 conditions, 798 events. 405/798 cut-off events. For 13818/13818 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 4112 event pairs, 32 based on Foata normal form. 24/822 useless extension candidates. Maximal degree in co-relation 4674. Up to 221 conditions per place. [2023-08-31 02:40:10,493 INFO L137 encePairwiseOnDemand]: 146/151 looper letters, 103 selfloop transitions, 86 changer transitions 3/192 dead transitions. [2023-08-31 02:40:10,494 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 192 transitions, 2332 flow [2023-08-31 02:40:10,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-08-31 02:40:10,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-08-31 02:40:10,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1358 transitions. [2023-08-31 02:40:10,498 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44966887417218543 [2023-08-31 02:40:10,498 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1358 transitions. [2023-08-31 02:40:10,498 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1358 transitions. [2023-08-31 02:40:10,499 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:40:10,499 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1358 transitions. [2023-08-31 02:40:10,502 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 67.9) internal successors, (1358), 20 states have internal predecessors, (1358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:40:10,504 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 151.0) internal successors, (3171), 21 states have internal predecessors, (3171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:40:10,505 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 151.0) internal successors, (3171), 21 states have internal predecessors, (3171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:40:10,505 INFO L175 Difference]: Start difference. First operand has 108 places, 127 transitions, 1544 flow. Second operand 20 states and 1358 transitions. [2023-08-31 02:40:10,505 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 192 transitions, 2332 flow [2023-08-31 02:40:10,563 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 192 transitions, 1998 flow, removed 134 selfloop flow, removed 6 redundant places. [2023-08-31 02:40:10,566 INFO L231 Difference]: Finished difference. Result has 120 places, 126 transitions, 1491 flow [2023-08-31 02:40:10,567 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=1170, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=1491, PETRI_PLACES=120, PETRI_TRANSITIONS=126} [2023-08-31 02:40:10,568 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 100 predicate places. [2023-08-31 02:40:10,568 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 126 transitions, 1491 flow [2023-08-31 02:40:10,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 64.0) internal successors, (960), 15 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:40:10,568 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:40:10,568 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:40:10,574 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-08-31 02:40:10,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-08-31 02:40:10,776 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 02:40:10,776 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:40:10,777 INFO L85 PathProgramCache]: Analyzing trace with hash 1455539503, now seen corresponding path program 6 times [2023-08-31 02:40:10,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:40:10,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245436217] [2023-08-31 02:40:10,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:40:10,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:40:10,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:40:10,873 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:40:10,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:40:10,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245436217] [2023-08-31 02:40:10,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245436217] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:40:10,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500431859] [2023-08-31 02:40:10,874 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-31 02:40:10,874 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:40:10,874 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:40:10,875 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 02:40:10,877 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-31 02:40:10,925 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-31 02:40:10,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 02:40:10,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-31 02:40:10,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:40:10,979 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:40:10,979 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:40:11,034 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:40:11,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1500431859] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:40:11,034 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:40:11,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 15 [2023-08-31 02:40:11,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713464000] [2023-08-31 02:40:11,035 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:40:11,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-31 02:40:11,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:40:11,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-31 02:40:11,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2023-08-31 02:40:11,105 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 151 [2023-08-31 02:40:11,106 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 126 transitions, 1491 flow. Second operand has 15 states, 15 states have (on average 64.06666666666666) internal successors, (961), 15 states have internal predecessors, (961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:40:11,106 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:40:11,106 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 151 [2023-08-31 02:40:11,106 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:40:11,766 INFO L130 PetriNetUnfolder]: 649/1264 cut-off events. [2023-08-31 02:40:11,766 INFO L131 PetriNetUnfolder]: For 32066/32066 co-relation queries the response was YES. [2023-08-31 02:40:11,770 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8728 conditions, 1264 events. 649/1264 cut-off events. For 32066/32066 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 7386 event pairs, 138 based on Foata normal form. 88/1352 useless extension candidates. Maximal degree in co-relation 8056. Up to 686 conditions per place. [2023-08-31 02:40:11,776 INFO L137 encePairwiseOnDemand]: 145/151 looper letters, 179 selfloop transitions, 124 changer transitions 2/305 dead transitions. [2023-08-31 02:40:11,776 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 305 transitions, 3898 flow [2023-08-31 02:40:11,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-31 02:40:11,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-31 02:40:11,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1643 transitions. [2023-08-31 02:40:11,780 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4533664459161148 [2023-08-31 02:40:11,780 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1643 transitions. [2023-08-31 02:40:11,780 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1643 transitions. [2023-08-31 02:40:11,781 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:40:11,781 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1643 transitions. [2023-08-31 02:40:11,787 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 68.45833333333333) internal successors, (1643), 24 states have internal predecessors, (1643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:40:11,790 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 151.0) internal successors, (3775), 25 states have internal predecessors, (3775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:40:11,790 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 151.0) internal successors, (3775), 25 states have internal predecessors, (3775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:40:11,791 INFO L175 Difference]: Start difference. First operand has 120 places, 126 transitions, 1491 flow. Second operand 24 states and 1643 transitions. [2023-08-31 02:40:11,791 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 305 transitions, 3898 flow [2023-08-31 02:40:11,826 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 305 transitions, 3711 flow, removed 31 selfloop flow, removed 17 redundant places. [2023-08-31 02:40:11,831 INFO L231 Difference]: Finished difference. Result has 139 places, 200 transitions, 2926 flow [2023-08-31 02:40:11,832 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=1375, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=2926, PETRI_PLACES=139, PETRI_TRANSITIONS=200} [2023-08-31 02:40:11,832 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 119 predicate places. [2023-08-31 02:40:11,832 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 200 transitions, 2926 flow [2023-08-31 02:40:11,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 64.06666666666666) internal successors, (961), 15 states have internal predecessors, (961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:40:11,833 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:40:11,833 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:40:11,840 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-31 02:40:12,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:40:12,037 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 02:40:12,038 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:40:12,038 INFO L85 PathProgramCache]: Analyzing trace with hash 862096835, now seen corresponding path program 7 times [2023-08-31 02:40:12,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:40:12,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171646978] [2023-08-31 02:40:12,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:40:12,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:40:12,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:40:12,146 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:40:12,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:40:12,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171646978] [2023-08-31 02:40:12,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171646978] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:40:12,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357059197] [2023-08-31 02:40:12,146 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-31 02:40:12,146 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:40:12,147 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:40:12,147 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 02:40:12,151 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-31 02:40:12,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:40:12,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-31 02:40:12,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:40:12,232 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:40:12,232 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:40:12,287 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:40:12,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1357059197] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:40:12,287 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:40:12,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 14 [2023-08-31 02:40:12,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870998729] [2023-08-31 02:40:12,288 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:40:12,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-31 02:40:12,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:40:12,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-31 02:40:12,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2023-08-31 02:40:12,355 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 151 [2023-08-31 02:40:12,356 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 200 transitions, 2926 flow. Second operand has 14 states, 14 states have (on average 63.857142857142854) internal successors, (894), 14 states have internal predecessors, (894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:40:12,356 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:40:12,356 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 151 [2023-08-31 02:40:12,356 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:40:12,949 INFO L130 PetriNetUnfolder]: 759/1518 cut-off events. [2023-08-31 02:40:12,950 INFO L131 PetriNetUnfolder]: For 52704/52704 co-relation queries the response was YES. [2023-08-31 02:40:12,955 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12732 conditions, 1518 events. 759/1518 cut-off events. For 52704/52704 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 9435 event pairs, 61 based on Foata normal form. 16/1534 useless extension candidates. Maximal degree in co-relation 11351. Up to 501 conditions per place. [2023-08-31 02:40:12,962 INFO L137 encePairwiseOnDemand]: 145/151 looper letters, 142 selfloop transitions, 163 changer transitions 6/311 dead transitions. [2023-08-31 02:40:12,962 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 311 transitions, 5135 flow [2023-08-31 02:40:12,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-31 02:40:12,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-31 02:40:12,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1482 transitions. [2023-08-31 02:40:12,964 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4461167971101746 [2023-08-31 02:40:12,965 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1482 transitions. [2023-08-31 02:40:12,965 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1482 transitions. [2023-08-31 02:40:12,965 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:40:12,965 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1482 transitions. [2023-08-31 02:40:12,967 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 67.36363636363636) internal successors, (1482), 22 states have internal predecessors, (1482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:40:12,969 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 151.0) internal successors, (3473), 23 states have internal predecessors, (3473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:40:12,970 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 151.0) internal successors, (3473), 23 states have internal predecessors, (3473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:40:12,970 INFO L175 Difference]: Start difference. First operand has 139 places, 200 transitions, 2926 flow. Second operand 22 states and 1482 transitions. [2023-08-31 02:40:12,970 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 311 transitions, 5135 flow [2023-08-31 02:40:13,057 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 311 transitions, 4534 flow, removed 276 selfloop flow, removed 6 redundant places. [2023-08-31 02:40:13,062 INFO L231 Difference]: Finished difference. Result has 163 places, 242 transitions, 3757 flow [2023-08-31 02:40:13,063 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=2415, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=3757, PETRI_PLACES=163, PETRI_TRANSITIONS=242} [2023-08-31 02:40:13,063 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 143 predicate places. [2023-08-31 02:40:13,063 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 242 transitions, 3757 flow [2023-08-31 02:40:13,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 63.857142857142854) internal successors, (894), 14 states have internal predecessors, (894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:40:13,064 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:40:13,064 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:40:13,069 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-31 02:40:13,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-08-31 02:40:13,269 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 02:40:13,269 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:40:13,270 INFO L85 PathProgramCache]: Analyzing trace with hash 860907543, now seen corresponding path program 8 times [2023-08-31 02:40:13,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:40:13,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510302817] [2023-08-31 02:40:13,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:40:13,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:40:13,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:40:13,354 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:40:13,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:40:13,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510302817] [2023-08-31 02:40:13,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510302817] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:40:13,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128539476] [2023-08-31 02:40:13,355 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 02:40:13,355 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:40:13,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:40:13,356 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 02:40:13,358 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-31 02:40:13,407 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 02:40:13,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 02:40:13,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-31 02:40:13,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:40:13,440 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:40:13,441 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:40:13,519 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:40:13,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2128539476] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:40:13,520 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:40:13,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 15 [2023-08-31 02:40:13,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146560804] [2023-08-31 02:40:13,520 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:40:13,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-31 02:40:13,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:40:13,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-31 02:40:13,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2023-08-31 02:40:13,589 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 151 [2023-08-31 02:40:13,590 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 242 transitions, 3757 flow. Second operand has 15 states, 15 states have (on average 63.8) internal successors, (957), 15 states have internal predecessors, (957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:40:13,590 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:40:13,590 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 151 [2023-08-31 02:40:13,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:40:14,018 INFO L130 PetriNetUnfolder]: 729/1444 cut-off events. [2023-08-31 02:40:14,019 INFO L131 PetriNetUnfolder]: For 68928/68928 co-relation queries the response was YES. [2023-08-31 02:40:14,026 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12559 conditions, 1444 events. 729/1444 cut-off events. For 68928/68928 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 8778 event pairs, 155 based on Foata normal form. 24/1468 useless extension candidates. Maximal degree in co-relation 11185. Up to 681 conditions per place. [2023-08-31 02:40:14,034 INFO L137 encePairwiseOnDemand]: 146/151 looper letters, 127 selfloop transitions, 143 changer transitions 3/273 dead transitions. [2023-08-31 02:40:14,034 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 273 transitions, 4407 flow [2023-08-31 02:40:14,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-31 02:40:14,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-31 02:40:14,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 883 transitions. [2023-08-31 02:40:14,035 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44982170147733064 [2023-08-31 02:40:14,036 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 883 transitions. [2023-08-31 02:40:14,036 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 883 transitions. [2023-08-31 02:40:14,036 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:40:14,036 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 883 transitions. [2023-08-31 02:40:14,065 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 67.92307692307692) internal successors, (883), 13 states have internal predecessors, (883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:40:14,067 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 151.0) internal successors, (2114), 14 states have internal predecessors, (2114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:40:14,067 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 151.0) internal successors, (2114), 14 states have internal predecessors, (2114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:40:14,067 INFO L175 Difference]: Start difference. First operand has 163 places, 242 transitions, 3757 flow. Second operand 13 states and 883 transitions. [2023-08-31 02:40:14,067 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 273 transitions, 4407 flow [2023-08-31 02:40:14,187 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 273 transitions, 4211 flow, removed 94 selfloop flow, removed 3 redundant places. [2023-08-31 02:40:14,190 INFO L231 Difference]: Finished difference. Result has 173 places, 237 transitions, 3869 flow [2023-08-31 02:40:14,191 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=3378, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=3869, PETRI_PLACES=173, PETRI_TRANSITIONS=237} [2023-08-31 02:40:14,191 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 153 predicate places. [2023-08-31 02:40:14,191 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 237 transitions, 3869 flow [2023-08-31 02:40:14,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 63.8) internal successors, (957), 15 states have internal predecessors, (957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:40:14,192 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:40:14,192 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:40:14,197 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-31 02:40:14,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-08-31 02:40:14,395 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 02:40:14,395 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:40:14,395 INFO L85 PathProgramCache]: Analyzing trace with hash -1477455475, now seen corresponding path program 9 times [2023-08-31 02:40:14,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:40:14,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066752286] [2023-08-31 02:40:14,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:40:14,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:40:14,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:40:14,547 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:40:14,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:40:14,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066752286] [2023-08-31 02:40:14,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066752286] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:40:14,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892087983] [2023-08-31 02:40:14,548 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 02:40:14,548 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:40:14,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:40:14,553 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 02:40:14,555 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-31 02:40:14,619 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-31 02:40:14,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 02:40:14,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-31 02:40:14,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:40:14,739 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:40:14,739 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:40:14,894 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:40:14,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [892087983] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:40:14,894 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:40:14,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 17 [2023-08-31 02:40:14,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773487133] [2023-08-31 02:40:14,895 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:40:14,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-31 02:40:14,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:40:14,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-31 02:40:14,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2023-08-31 02:40:15,129 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 151 [2023-08-31 02:40:15,130 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 237 transitions, 3869 flow. Second operand has 19 states, 19 states have (on average 60.26315789473684) internal successors, (1145), 19 states have internal predecessors, (1145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:40:15,130 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:40:15,130 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 151 [2023-08-31 02:40:15,130 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:40:15,653 INFO L130 PetriNetUnfolder]: 879/1788 cut-off events. [2023-08-31 02:40:15,654 INFO L131 PetriNetUnfolder]: For 96941/96952 co-relation queries the response was YES. [2023-08-31 02:40:15,662 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16877 conditions, 1788 events. 879/1788 cut-off events. For 96941/96952 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 11793 event pairs, 120 based on Foata normal form. 82/1870 useless extension candidates. Maximal degree in co-relation 15717. Up to 900 conditions per place. [2023-08-31 02:40:15,676 INFO L137 encePairwiseOnDemand]: 146/151 looper letters, 196 selfloop transitions, 89 changer transitions 61/352 dead transitions. [2023-08-31 02:40:15,676 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 352 transitions, 6317 flow [2023-08-31 02:40:15,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-31 02:40:15,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-31 02:40:15,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 655 transitions. [2023-08-31 02:40:15,678 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4337748344370861 [2023-08-31 02:40:15,678 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 655 transitions. [2023-08-31 02:40:15,678 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 655 transitions. [2023-08-31 02:40:15,678 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:40:15,678 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 655 transitions. [2023-08-31 02:40:15,679 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 65.5) internal successors, (655), 10 states have internal predecessors, (655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:40:15,680 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 151.0) internal successors, (1661), 11 states have internal predecessors, (1661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:40:15,681 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 151.0) internal successors, (1661), 11 states have internal predecessors, (1661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:40:15,681 INFO L175 Difference]: Start difference. First operand has 173 places, 237 transitions, 3869 flow. Second operand 10 states and 655 transitions. [2023-08-31 02:40:15,681 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 352 transitions, 6317 flow [2023-08-31 02:40:15,821 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 352 transitions, 6029 flow, removed 20 selfloop flow, removed 15 redundant places. [2023-08-31 02:40:15,825 INFO L231 Difference]: Finished difference. Result has 170 places, 247 transitions, 4397 flow [2023-08-31 02:40:15,826 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=3587, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4397, PETRI_PLACES=170, PETRI_TRANSITIONS=247} [2023-08-31 02:40:15,826 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 150 predicate places. [2023-08-31 02:40:15,827 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 247 transitions, 4397 flow [2023-08-31 02:40:15,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 60.26315789473684) internal successors, (1145), 19 states have internal predecessors, (1145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:40:15,827 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:40:15,827 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:40:15,837 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-08-31 02:40:16,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-08-31 02:40:16,029 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 02:40:16,029 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:40:16,030 INFO L85 PathProgramCache]: Analyzing trace with hash -2063184372, now seen corresponding path program 10 times [2023-08-31 02:40:16,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:40:16,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089819398] [2023-08-31 02:40:16,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:40:16,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:40:16,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:40:16,160 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:40:16,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:40:16,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089819398] [2023-08-31 02:40:16,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089819398] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:40:16,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690263170] [2023-08-31 02:40:16,160 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-31 02:40:16,161 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:40:16,161 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:40:16,162 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 02:40:16,164 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-31 02:40:16,215 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-31 02:40:16,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 02:40:16,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-31 02:40:16,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:40:16,271 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:40:16,271 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:40:16,339 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:40:16,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [690263170] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:40:16,340 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:40:16,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2023-08-31 02:40:16,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482124677] [2023-08-31 02:40:16,340 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:40:16,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-31 02:40:16,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:40:16,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-31 02:40:16,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2023-08-31 02:40:16,441 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 151 [2023-08-31 02:40:16,442 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 247 transitions, 4397 flow. Second operand has 15 states, 15 states have (on average 64.0) internal successors, (960), 15 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:40:16,442 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:40:16,442 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 151 [2023-08-31 02:40:16,442 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:40:17,373 INFO L130 PetriNetUnfolder]: 1647/3340 cut-off events. [2023-08-31 02:40:17,374 INFO L131 PetriNetUnfolder]: For 174080/174080 co-relation queries the response was YES. [2023-08-31 02:40:17,390 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31526 conditions, 3340 events. 1647/3340 cut-off events. For 174080/174080 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 24487 event pairs, 203 based on Foata normal form. 68/3408 useless extension candidates. Maximal degree in co-relation 27779. Up to 1261 conditions per place. [2023-08-31 02:40:17,403 INFO L137 encePairwiseOnDemand]: 146/151 looper letters, 450 selfloop transitions, 146 changer transitions 2/598 dead transitions. [2023-08-31 02:40:17,404 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 598 transitions, 11388 flow [2023-08-31 02:40:17,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-31 02:40:17,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-31 02:40:17,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1172 transitions. [2023-08-31 02:40:17,405 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4565640825866771 [2023-08-31 02:40:17,406 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1172 transitions. [2023-08-31 02:40:17,406 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1172 transitions. [2023-08-31 02:40:17,406 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:40:17,406 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1172 transitions. [2023-08-31 02:40:17,408 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 68.94117647058823) internal successors, (1172), 17 states have internal predecessors, (1172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:40:17,410 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 151.0) internal successors, (2718), 18 states have internal predecessors, (2718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:40:17,410 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 151.0) internal successors, (2718), 18 states have internal predecessors, (2718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:40:17,410 INFO L175 Difference]: Start difference. First operand has 170 places, 247 transitions, 4397 flow. Second operand 17 states and 1172 transitions. [2023-08-31 02:40:17,410 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 598 transitions, 11388 flow [2023-08-31 02:40:17,660 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 598 transitions, 11113 flow, removed 119 selfloop flow, removed 7 redundant places. [2023-08-31 02:40:17,666 INFO L231 Difference]: Finished difference. Result has 179 places, 361 transitions, 7164 flow [2023-08-31 02:40:17,666 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=4260, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=7164, PETRI_PLACES=179, PETRI_TRANSITIONS=361} [2023-08-31 02:40:17,667 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 159 predicate places. [2023-08-31 02:40:17,667 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 361 transitions, 7164 flow [2023-08-31 02:40:17,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 64.0) internal successors, (960), 15 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:40:17,667 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:40:17,668 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:40:17,672 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-08-31 02:40:17,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-08-31 02:40:17,868 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 02:40:17,868 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:40:17,868 INFO L85 PathProgramCache]: Analyzing trace with hash -475875398, now seen corresponding path program 11 times [2023-08-31 02:40:17,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:40:17,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217440862] [2023-08-31 02:40:17,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:40:17,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:40:17,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:40:17,984 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:40:17,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:40:17,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217440862] [2023-08-31 02:40:17,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217440862] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:40:17,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906474152] [2023-08-31 02:40:17,984 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-31 02:40:17,985 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:40:17,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:40:17,986 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 02:40:17,988 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-08-31 02:40:18,046 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-31 02:40:18,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 02:40:18,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-31 02:40:18,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:40:18,111 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:40:18,111 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:40:18,201 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:40:18,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [906474152] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:40:18,201 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:40:18,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2023-08-31 02:40:18,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740459476] [2023-08-31 02:40:18,202 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:40:18,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-31 02:40:18,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:40:18,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-31 02:40:18,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2023-08-31 02:40:18,282 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 151 [2023-08-31 02:40:18,283 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 361 transitions, 7164 flow. Second operand has 16 states, 16 states have (on average 63.875) internal successors, (1022), 16 states have internal predecessors, (1022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:40:18,283 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:40:18,283 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 151 [2023-08-31 02:40:18,283 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:40:19,827 INFO L130 PetriNetUnfolder]: 1772/3571 cut-off events. [2023-08-31 02:40:19,827 INFO L131 PetriNetUnfolder]: For 183020/183020 co-relation queries the response was YES. [2023-08-31 02:40:19,845 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34885 conditions, 3571 events. 1772/3571 cut-off events. For 183020/183020 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 26445 event pairs, 231 based on Foata normal form. 58/3629 useless extension candidates. Maximal degree in co-relation 31693. Up to 1314 conditions per place. [2023-08-31 02:40:19,858 INFO L137 encePairwiseOnDemand]: 145/151 looper letters, 513 selfloop transitions, 195 changer transitions 2/710 dead transitions. [2023-08-31 02:40:19,858 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 710 transitions, 13680 flow [2023-08-31 02:40:19,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-08-31 02:40:19,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-08-31 02:40:19,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 2386 transitions. [2023-08-31 02:40:19,861 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45146641438032165 [2023-08-31 02:40:19,861 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 2386 transitions. [2023-08-31 02:40:19,862 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 2386 transitions. [2023-08-31 02:40:19,862 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:40:19,862 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 2386 transitions. [2023-08-31 02:40:19,865 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 68.17142857142858) internal successors, (2386), 35 states have internal predecessors, (2386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:40:19,868 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 151.0) internal successors, (5436), 36 states have internal predecessors, (5436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:40:19,869 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 151.0) internal successors, (5436), 36 states have internal predecessors, (5436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:40:19,869 INFO L175 Difference]: Start difference. First operand has 179 places, 361 transitions, 7164 flow. Second operand 35 states and 2386 transitions. [2023-08-31 02:40:19,869 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 710 transitions, 13680 flow [2023-08-31 02:40:20,199 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 710 transitions, 12959 flow, removed 328 selfloop flow, removed 5 redundant places. [2023-08-31 02:40:20,207 INFO L231 Difference]: Finished difference. Result has 219 places, 426 transitions, 8638 flow [2023-08-31 02:40:20,208 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=6633, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=361, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=145, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=8638, PETRI_PLACES=219, PETRI_TRANSITIONS=426} [2023-08-31 02:40:20,208 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 199 predicate places. [2023-08-31 02:40:20,208 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 426 transitions, 8638 flow [2023-08-31 02:40:20,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 63.875) internal successors, (1022), 16 states have internal predecessors, (1022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:40:20,232 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:40:20,232 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:40:20,239 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-08-31 02:40:20,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:40:20,439 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 02:40:20,439 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:40:20,440 INFO L85 PathProgramCache]: Analyzing trace with hash 1140862416, now seen corresponding path program 12 times [2023-08-31 02:40:20,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:40:20,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309695060] [2023-08-31 02:40:20,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:40:20,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:40:20,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:40:20,628 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:40:20,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:40:20,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309695060] [2023-08-31 02:40:20,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309695060] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:40:20,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940626341] [2023-08-31 02:40:20,629 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-31 02:40:20,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:40:20,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:40:20,630 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 02:40:20,632 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-08-31 02:40:20,705 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-08-31 02:40:20,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 02:40:20,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-31 02:40:20,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:40:20,782 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:40:20,782 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:40:20,882 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:40:20,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1940626341] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:40:20,882 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:40:20,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2023-08-31 02:40:20,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706906433] [2023-08-31 02:40:20,882 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:40:20,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-31 02:40:20,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:40:20,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-31 02:40:20,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=361, Unknown=0, NotChecked=0, Total=462 [2023-08-31 02:40:20,995 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 151 [2023-08-31 02:40:20,996 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 426 transitions, 8638 flow. Second operand has 22 states, 22 states have (on average 63.54545454545455) internal successors, (1398), 22 states have internal predecessors, (1398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:40:20,996 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:40:20,996 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 151 [2023-08-31 02:40:20,996 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:40:23,641 INFO L130 PetriNetUnfolder]: 2172/4396 cut-off events. [2023-08-31 02:40:23,642 INFO L131 PetriNetUnfolder]: For 281276/281276 co-relation queries the response was YES. [2023-08-31 02:40:23,665 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46183 conditions, 4396 events. 2172/4396 cut-off events. For 281276/281276 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 34209 event pairs, 80 based on Foata normal form. 38/4434 useless extension candidates. Maximal degree in co-relation 45755. Up to 1393 conditions per place. [2023-08-31 02:40:23,681 INFO L137 encePairwiseOnDemand]: 145/151 looper letters, 301 selfloop transitions, 579 changer transitions 32/912 dead transitions. [2023-08-31 02:40:23,682 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 912 transitions, 19241 flow [2023-08-31 02:40:23,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2023-08-31 02:40:23,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2023-08-31 02:40:23,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 4048 transitions. [2023-08-31 02:40:23,686 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4467991169977925 [2023-08-31 02:40:23,686 INFO L72 ComplementDD]: Start complementDD. Operand 60 states and 4048 transitions. [2023-08-31 02:40:23,686 INFO L73 IsDeterministic]: Start isDeterministic. Operand 60 states and 4048 transitions. [2023-08-31 02:40:23,687 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:40:23,687 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 60 states and 4048 transitions. [2023-08-31 02:40:23,691 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 61 states, 60 states have (on average 67.46666666666667) internal successors, (4048), 60 states have internal predecessors, (4048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:40:23,697 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 61 states, 61 states have (on average 151.0) internal successors, (9211), 61 states have internal predecessors, (9211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:40:23,698 INFO L81 ComplementDD]: Finished complementDD. Result has 61 states, 61 states have (on average 151.0) internal successors, (9211), 61 states have internal predecessors, (9211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:40:23,698 INFO L175 Difference]: Start difference. First operand has 219 places, 426 transitions, 8638 flow. Second operand 60 states and 4048 transitions. [2023-08-31 02:40:23,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 912 transitions, 19241 flow [2023-08-31 02:40:24,380 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 912 transitions, 18425 flow, removed 353 selfloop flow, removed 10 redundant places. [2023-08-31 02:40:24,393 INFO L231 Difference]: Finished difference. Result has 285 places, 676 transitions, 15440 flow [2023-08-31 02:40:24,393 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=8043, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=426, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=352, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=60, PETRI_FLOW=15440, PETRI_PLACES=285, PETRI_TRANSITIONS=676} [2023-08-31 02:40:24,393 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 265 predicate places. [2023-08-31 02:40:24,393 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 676 transitions, 15440 flow [2023-08-31 02:40:24,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 63.54545454545455) internal successors, (1398), 22 states have internal predecessors, (1398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:40:24,394 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:40:24,394 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:40:24,398 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-08-31 02:40:24,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-08-31 02:40:24,599 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 02:40:24,599 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:40:24,599 INFO L85 PathProgramCache]: Analyzing trace with hash 270066790, now seen corresponding path program 13 times [2023-08-31 02:40:24,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:40:24,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532461932] [2023-08-31 02:40:24,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:40:24,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:40:24,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:40:24,710 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:40:24,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:40:24,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532461932] [2023-08-31 02:40:24,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532461932] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:40:24,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [323757063] [2023-08-31 02:40:24,711 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-31 02:40:24,711 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:40:24,711 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:40:24,712 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 02:40:24,714 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-08-31 02:40:24,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:40:24,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-31 02:40:24,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:40:24,818 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:40:24,819 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:40:24,903 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:40:24,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [323757063] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:40:24,904 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:40:24,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2023-08-31 02:40:24,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311070037] [2023-08-31 02:40:24,904 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:40:24,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-31 02:40:24,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:40:24,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-31 02:40:24,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2023-08-31 02:40:25,013 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 151 [2023-08-31 02:40:25,014 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 676 transitions, 15440 flow. Second operand has 17 states, 17 states have (on average 63.76470588235294) internal successors, (1084), 17 states have internal predecessors, (1084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:40:25,014 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:40:25,014 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 151 [2023-08-31 02:40:25,014 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:40:27,516 INFO L130 PetriNetUnfolder]: 2312/4614 cut-off events. [2023-08-31 02:40:27,517 INFO L131 PetriNetUnfolder]: For 486549/486549 co-relation queries the response was YES. [2023-08-31 02:40:27,547 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54379 conditions, 4614 events. 2312/4614 cut-off events. For 486549/486549 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 35739 event pairs, 229 based on Foata normal form. 90/4704 useless extension candidates. Maximal degree in co-relation 53799. Up to 1654 conditions per place. [2023-08-31 02:40:27,565 INFO L137 encePairwiseOnDemand]: 146/151 looper letters, 569 selfloop transitions, 324 changer transitions 20/913 dead transitions. [2023-08-31 02:40:27,566 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 913 transitions, 21042 flow [2023-08-31 02:40:27,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-08-31 02:40:27,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-08-31 02:40:27,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 2383 transitions. [2023-08-31 02:40:27,568 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4508987701040681 [2023-08-31 02:40:27,568 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 2383 transitions. [2023-08-31 02:40:27,569 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 2383 transitions. [2023-08-31 02:40:27,569 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:40:27,569 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 2383 transitions. [2023-08-31 02:40:27,572 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 68.08571428571429) internal successors, (2383), 35 states have internal predecessors, (2383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:40:27,575 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 151.0) internal successors, (5436), 36 states have internal predecessors, (5436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:40:27,576 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 151.0) internal successors, (5436), 36 states have internal predecessors, (5436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:40:27,576 INFO L175 Difference]: Start difference. First operand has 285 places, 676 transitions, 15440 flow. Second operand 35 states and 2383 transitions. [2023-08-31 02:40:27,576 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 913 transitions, 21042 flow [2023-08-31 02:40:29,025 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 913 transitions, 18678 flow, removed 1059 selfloop flow, removed 17 redundant places. [2023-08-31 02:40:29,039 INFO L231 Difference]: Finished difference. Result has 307 places, 734 transitions, 15851 flow [2023-08-31 02:40:29,039 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=13381, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=676, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=274, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=379, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=15851, PETRI_PLACES=307, PETRI_TRANSITIONS=734} [2023-08-31 02:40:29,039 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 287 predicate places. [2023-08-31 02:40:29,039 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 734 transitions, 15851 flow [2023-08-31 02:40:29,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 63.76470588235294) internal successors, (1084), 17 states have internal predecessors, (1084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:40:29,040 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:40:29,040 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:40:29,047 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-08-31 02:40:29,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-08-31 02:40:29,244 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 02:40:29,245 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:40:29,245 INFO L85 PathProgramCache]: Analyzing trace with hash 1139673124, now seen corresponding path program 14 times [2023-08-31 02:40:29,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:40:29,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196027480] [2023-08-31 02:40:29,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:40:29,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:40:29,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:40:29,406 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:40:29,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:40:29,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196027480] [2023-08-31 02:40:29,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196027480] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:40:29,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84928937] [2023-08-31 02:40:29,407 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 02:40:29,407 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:40:29,407 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:40:29,408 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 02:40:29,410 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-08-31 02:40:29,461 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 02:40:29,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 02:40:29,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-31 02:40:29,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:40:29,525 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:40:29,525 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:40:29,618 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:40:29,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [84928937] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:40:29,619 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:40:29,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 23 [2023-08-31 02:40:29,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729711659] [2023-08-31 02:40:29,619 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:40:29,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-31 02:40:29,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:40:29,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-31 02:40:29,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=406, Unknown=0, NotChecked=0, Total=506 [2023-08-31 02:40:29,762 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 151 [2023-08-31 02:40:29,764 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 734 transitions, 15851 flow. Second operand has 23 states, 23 states have (on average 63.47826086956522) internal successors, (1460), 23 states have internal predecessors, (1460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:40:29,765 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:40:29,765 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 151 [2023-08-31 02:40:29,765 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:40:32,321 INFO L130 PetriNetUnfolder]: 2324/4664 cut-off events. [2023-08-31 02:40:32,322 INFO L131 PetriNetUnfolder]: For 560320/560320 co-relation queries the response was YES. [2023-08-31 02:40:32,356 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54453 conditions, 4664 events. 2324/4664 cut-off events. For 560320/560320 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 36423 event pairs, 172 based on Foata normal form. 72/4736 useless extension candidates. Maximal degree in co-relation 53939. Up to 1105 conditions per place. [2023-08-31 02:40:32,377 INFO L137 encePairwiseOnDemand]: 146/151 looper letters, 374 selfloop transitions, 541 changer transitions 3/918 dead transitions. [2023-08-31 02:40:32,378 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 918 transitions, 20073 flow [2023-08-31 02:40:32,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-08-31 02:40:32,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2023-08-31 02:40:32,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 2992 transitions. [2023-08-31 02:40:32,381 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4503311258278146 [2023-08-31 02:40:32,381 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 2992 transitions. [2023-08-31 02:40:32,381 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 2992 transitions. [2023-08-31 02:40:32,382 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:40:32,382 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 2992 transitions. [2023-08-31 02:40:32,385 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 68.0) internal successors, (2992), 44 states have internal predecessors, (2992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:40:32,390 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 151.0) internal successors, (6795), 45 states have internal predecessors, (6795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:40:32,391 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 151.0) internal successors, (6795), 45 states have internal predecessors, (6795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:40:32,391 INFO L175 Difference]: Start difference. First operand has 307 places, 734 transitions, 15851 flow. Second operand 44 states and 2992 transitions. [2023-08-31 02:40:32,391 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 918 transitions, 20073 flow [2023-08-31 02:40:34,009 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 918 transitions, 19432 flow, removed 223 selfloop flow, removed 17 redundant places. [2023-08-31 02:40:34,023 INFO L231 Difference]: Finished difference. Result has 343 places, 742 transitions, 16941 flow [2023-08-31 02:40:34,023 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=15020, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=724, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=522, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=16941, PETRI_PLACES=343, PETRI_TRANSITIONS=742} [2023-08-31 02:40:34,023 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 323 predicate places. [2023-08-31 02:40:34,023 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 742 transitions, 16941 flow [2023-08-31 02:40:34,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 63.47826086956522) internal successors, (1460), 23 states have internal predecessors, (1460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:40:34,024 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:40:34,024 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:40:34,030 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-08-31 02:40:34,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:40:34,225 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 02:40:34,225 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:40:34,225 INFO L85 PathProgramCache]: Analyzing trace with hash -452021610, now seen corresponding path program 15 times [2023-08-31 02:40:34,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:40:34,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170555342] [2023-08-31 02:40:34,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:40:34,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:40:34,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:40:34,326 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:40:34,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:40:34,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170555342] [2023-08-31 02:40:34,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170555342] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:40:34,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354919717] [2023-08-31 02:40:34,328 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 02:40:34,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:40:34,329 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:40:34,333 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 02:40:34,335 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-08-31 02:40:34,406 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-08-31 02:40:34,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 02:40:34,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-31 02:40:34,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:40:34,470 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:40:34,471 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:40:34,553 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:40:34,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [354919717] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:40:34,553 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:40:34,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2023-08-31 02:40:34,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498342394] [2023-08-31 02:40:34,553 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:40:34,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-31 02:40:34,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:40:34,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-31 02:40:34,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2023-08-31 02:40:34,685 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 151 [2023-08-31 02:40:34,686 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 742 transitions, 16941 flow. Second operand has 18 states, 18 states have (on average 63.72222222222222) internal successors, (1147), 18 states have internal predecessors, (1147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:40:34,686 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:40:34,686 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 151 [2023-08-31 02:40:34,686 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:40:37,977 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-31 02:40:39,970 INFO L130 PetriNetUnfolder]: 2789/5587 cut-off events. [2023-08-31 02:40:39,970 INFO L131 PetriNetUnfolder]: For 841141/841141 co-relation queries the response was YES. [2023-08-31 02:40:40,007 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69341 conditions, 5587 events. 2789/5587 cut-off events. For 841141/841141 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 45175 event pairs, 696 based on Foata normal form. 90/5677 useless extension candidates. Maximal degree in co-relation 68655. Up to 3278 conditions per place. [2023-08-31 02:40:40,027 INFO L137 encePairwiseOnDemand]: 145/151 looper letters, 615 selfloop transitions, 410 changer transitions 24/1049 dead transitions. [2023-08-31 02:40:40,027 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 383 places, 1049 transitions, 25028 flow [2023-08-31 02:40:40,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-08-31 02:40:40,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2023-08-31 02:40:40,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 2762 transitions. [2023-08-31 02:40:40,031 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4461314811823615 [2023-08-31 02:40:40,031 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 2762 transitions. [2023-08-31 02:40:40,031 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 2762 transitions. [2023-08-31 02:40:40,031 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:40:40,031 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 2762 transitions. [2023-08-31 02:40:40,034 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 67.36585365853658) internal successors, (2762), 41 states have internal predecessors, (2762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:40:40,037 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 151.0) internal successors, (6342), 42 states have internal predecessors, (6342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:40:40,038 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 151.0) internal successors, (6342), 42 states have internal predecessors, (6342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:40:40,038 INFO L175 Difference]: Start difference. First operand has 343 places, 742 transitions, 16941 flow. Second operand 41 states and 2762 transitions. [2023-08-31 02:40:40,038 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 383 places, 1049 transitions, 25028 flow [2023-08-31 02:40:42,546 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 1049 transitions, 24238 flow, removed 117 selfloop flow, removed 32 redundant places. [2023-08-31 02:40:42,562 INFO L231 Difference]: Finished difference. Result has 364 places, 865 transitions, 21360 flow [2023-08-31 02:40:42,563 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=16275, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=741, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=299, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=372, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=21360, PETRI_PLACES=364, PETRI_TRANSITIONS=865} [2023-08-31 02:40:42,563 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 344 predicate places. [2023-08-31 02:40:42,563 INFO L495 AbstractCegarLoop]: Abstraction has has 364 places, 865 transitions, 21360 flow [2023-08-31 02:40:42,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 63.72222222222222) internal successors, (1147), 18 states have internal predecessors, (1147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:40:42,563 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:40:42,563 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:40:42,569 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-08-31 02:40:42,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:40:42,764 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 02:40:42,764 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:40:42,764 INFO L85 PathProgramCache]: Analyzing trace with hash 1486062540, now seen corresponding path program 16 times [2023-08-31 02:40:42,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:40:42,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545913340] [2023-08-31 02:40:42,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:40:42,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:40:42,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:40:42,874 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:40:42,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:40:42,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545913340] [2023-08-31 02:40:42,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545913340] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:40:42,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002880321] [2023-08-31 02:40:42,875 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-31 02:40:42,875 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:40:42,875 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:40:42,890 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 02:40:42,896 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-08-31 02:40:42,952 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-31 02:40:42,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 02:40:42,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-31 02:40:42,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:40:43,005 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:40:43,006 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:40:43,093 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:40:43,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1002880321] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:40:43,093 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:40:43,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2023-08-31 02:40:43,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919699843] [2023-08-31 02:40:43,093 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:40:43,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-31 02:40:43,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:40:43,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-31 02:40:43,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2023-08-31 02:40:43,200 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 151 [2023-08-31 02:40:43,201 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 364 places, 865 transitions, 21360 flow. Second operand has 16 states, 16 states have (on average 63.875) internal successors, (1022), 16 states have internal predecessors, (1022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:40:43,201 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:40:43,201 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 151 [2023-08-31 02:40:43,201 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:40:46,190 INFO L130 PetriNetUnfolder]: 3178/6320 cut-off events. [2023-08-31 02:40:46,190 INFO L131 PetriNetUnfolder]: For 1055485/1055485 co-relation queries the response was YES. [2023-08-31 02:40:46,238 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82781 conditions, 6320 events. 3178/6320 cut-off events. For 1055485/1055485 co-relation queries the response was YES. Maximal size of possible extension queue 565. Compared 51918 event pairs, 976 based on Foata normal form. 58/6378 useless extension candidates. Maximal degree in co-relation 81829. Up to 4281 conditions per place. [2023-08-31 02:40:46,262 INFO L137 encePairwiseOnDemand]: 145/151 looper letters, 854 selfloop transitions, 312 changer transitions 4/1170 dead transitions. [2023-08-31 02:40:46,262 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 400 places, 1170 transitions, 28762 flow [2023-08-31 02:40:46,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-08-31 02:40:46,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2023-08-31 02:40:46,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 2652 transitions. [2023-08-31 02:40:46,265 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4503311258278146 [2023-08-31 02:40:46,265 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 2652 transitions. [2023-08-31 02:40:46,265 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 2652 transitions. [2023-08-31 02:40:46,265 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:40:46,265 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 2652 transitions. [2023-08-31 02:40:46,268 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 68.0) internal successors, (2652), 39 states have internal predecessors, (2652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:40:46,272 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 151.0) internal successors, (6040), 40 states have internal predecessors, (6040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:40:46,272 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 151.0) internal successors, (6040), 40 states have internal predecessors, (6040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:40:46,272 INFO L175 Difference]: Start difference. First operand has 364 places, 865 transitions, 21360 flow. Second operand 39 states and 2652 transitions. [2023-08-31 02:40:46,272 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 400 places, 1170 transitions, 28762 flow [2023-08-31 02:40:49,413 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 381 places, 1170 transitions, 28239 flow, removed 202 selfloop flow, removed 19 redundant places. [2023-08-31 02:40:49,438 INFO L231 Difference]: Finished difference. Result has 395 places, 969 transitions, 24660 flow [2023-08-31 02:40:49,439 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=20847, PETRI_DIFFERENCE_MINUEND_PLACES=343, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=865, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=223, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=589, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=24660, PETRI_PLACES=395, PETRI_TRANSITIONS=969} [2023-08-31 02:40:49,439 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 375 predicate places. [2023-08-31 02:40:49,440 INFO L495 AbstractCegarLoop]: Abstraction has has 395 places, 969 transitions, 24660 flow [2023-08-31 02:40:49,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 63.875) internal successors, (1022), 16 states have internal predecessors, (1022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:40:49,440 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:40:49,440 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:40:49,447 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-08-31 02:40:49,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:40:49,641 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 02:40:49,641 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:40:49,641 INFO L85 PathProgramCache]: Analyzing trace with hash 1267300304, now seen corresponding path program 17 times [2023-08-31 02:40:49,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:40:49,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366117965] [2023-08-31 02:40:49,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:40:49,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:40:49,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:40:49,743 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:40:49,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:40:49,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366117965] [2023-08-31 02:40:49,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366117965] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:40:49,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2131208271] [2023-08-31 02:40:49,744 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-31 02:40:49,744 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:40:49,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:40:49,745 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 02:40:49,748 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-08-31 02:40:49,815 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-31 02:40:49,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 02:40:49,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-31 02:40:49,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:40:49,875 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:40:49,875 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:40:49,960 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:40:49,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2131208271] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:40:49,960 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:40:49,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2023-08-31 02:40:49,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193221138] [2023-08-31 02:40:49,961 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:40:49,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-31 02:40:49,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:40:49,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-31 02:40:49,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2023-08-31 02:40:50,042 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 151 [2023-08-31 02:40:50,043 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 395 places, 969 transitions, 24660 flow. Second operand has 17 states, 17 states have (on average 63.8235294117647) internal successors, (1085), 17 states have internal predecessors, (1085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:40:50,043 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:40:50,043 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 151 [2023-08-31 02:40:50,043 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:40:54,312 INFO L130 PetriNetUnfolder]: 3456/6883 cut-off events. [2023-08-31 02:40:54,312 INFO L131 PetriNetUnfolder]: For 1265975/1265975 co-relation queries the response was YES. [2023-08-31 02:40:54,382 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93386 conditions, 6883 events. 3456/6883 cut-off events. For 1265975/1265975 co-relation queries the response was YES. Maximal size of possible extension queue 607. Compared 57290 event pairs, 1244 based on Foata normal form. 56/6939 useless extension candidates. Maximal degree in co-relation 92435. Up to 5461 conditions per place. [2023-08-31 02:40:54,411 INFO L137 encePairwiseOnDemand]: 146/151 looper letters, 915 selfloop transitions, 244 changer transitions 24/1183 dead transitions. [2023-08-31 02:40:54,412 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 421 places, 1183 transitions, 30799 flow [2023-08-31 02:40:54,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-08-31 02:40:54,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-08-31 02:40:54,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 1840 transitions. [2023-08-31 02:40:54,413 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4513122393917096 [2023-08-31 02:40:54,413 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 1840 transitions. [2023-08-31 02:40:54,414 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 1840 transitions. [2023-08-31 02:40:54,414 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:40:54,414 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 1840 transitions. [2023-08-31 02:40:54,416 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 68.14814814814815) internal successors, (1840), 27 states have internal predecessors, (1840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:40:54,418 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 151.0) internal successors, (4228), 28 states have internal predecessors, (4228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:40:54,419 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 151.0) internal successors, (4228), 28 states have internal predecessors, (4228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:40:54,419 INFO L175 Difference]: Start difference. First operand has 395 places, 969 transitions, 24660 flow. Second operand 27 states and 1840 transitions. [2023-08-31 02:40:54,419 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 421 places, 1183 transitions, 30799 flow [2023-08-31 02:40:58,677 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 410 places, 1183 transitions, 30022 flow, removed 345 selfloop flow, removed 11 redundant places. [2023-08-31 02:40:58,698 INFO L231 Difference]: Finished difference. Result has 420 places, 1030 transitions, 26451 flow [2023-08-31 02:40:58,699 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=23839, PETRI_DIFFERENCE_MINUEND_PLACES=384, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=967, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=183, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=740, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=26451, PETRI_PLACES=420, PETRI_TRANSITIONS=1030} [2023-08-31 02:40:58,699 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 400 predicate places. [2023-08-31 02:40:58,699 INFO L495 AbstractCegarLoop]: Abstraction has has 420 places, 1030 transitions, 26451 flow [2023-08-31 02:40:58,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 63.8235294117647) internal successors, (1085), 17 states have internal predecessors, (1085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:40:58,700 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:40:58,700 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:40:58,707 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-08-31 02:40:58,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-08-31 02:40:58,907 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 02:40:58,907 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:40:58,908 INFO L85 PathProgramCache]: Analyzing trace with hash -2075125822, now seen corresponding path program 18 times [2023-08-31 02:40:58,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:40:58,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100254814] [2023-08-31 02:40:58,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:40:58,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:40:58,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:40:59,013 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:40:59,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:40:59,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100254814] [2023-08-31 02:40:59,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100254814] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:40:59,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762394458] [2023-08-31 02:40:59,014 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-31 02:40:59,014 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:40:59,015 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:40:59,015 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 02:40:59,017 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-08-31 02:40:59,079 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-31 02:40:59,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 02:40:59,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-31 02:40:59,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:40:59,134 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:40:59,134 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:40:59,218 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:40:59,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [762394458] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:40:59,219 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:40:59,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2023-08-31 02:40:59,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662290418] [2023-08-31 02:40:59,219 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:40:59,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-31 02:40:59,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:40:59,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-31 02:40:59,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2023-08-31 02:40:59,301 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 151 [2023-08-31 02:40:59,301 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 420 places, 1030 transitions, 26451 flow. Second operand has 16 states, 16 states have (on average 63.75) internal successors, (1020), 16 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:40:59,301 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:40:59,301 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 151 [2023-08-31 02:40:59,302 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:41:03,147 INFO L130 PetriNetUnfolder]: 3726/7375 cut-off events. [2023-08-31 02:41:03,148 INFO L131 PetriNetUnfolder]: For 1467705/1467705 co-relation queries the response was YES. [2023-08-31 02:41:03,220 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100365 conditions, 7375 events. 3726/7375 cut-off events. For 1467705/1467705 co-relation queries the response was YES. Maximal size of possible extension queue 650. Compared 61838 event pairs, 1357 based on Foata normal form. 96/7471 useless extension candidates. Maximal degree in co-relation 98807. Up to 6093 conditions per place. [2023-08-31 02:41:03,256 INFO L137 encePairwiseOnDemand]: 145/151 looper letters, 1043 selfloop transitions, 263 changer transitions 3/1309 dead transitions. [2023-08-31 02:41:03,256 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 454 places, 1309 transitions, 34648 flow [2023-08-31 02:41:03,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-08-31 02:41:03,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-08-31 02:41:03,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 2444 transitions. [2023-08-31 02:41:03,259 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4495952906548933 [2023-08-31 02:41:03,259 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 2444 transitions. [2023-08-31 02:41:03,259 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 2444 transitions. [2023-08-31 02:41:03,260 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:41:03,260 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 2444 transitions. [2023-08-31 02:41:03,262 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 67.88888888888889) internal successors, (2444), 36 states have internal predecessors, (2444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:41:03,265 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 151.0) internal successors, (5587), 37 states have internal predecessors, (5587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:41:03,266 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 151.0) internal successors, (5587), 37 states have internal predecessors, (5587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:41:03,266 INFO L175 Difference]: Start difference. First operand has 420 places, 1030 transitions, 26451 flow. Second operand 36 states and 2444 transitions. [2023-08-31 02:41:03,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 454 places, 1309 transitions, 34648 flow [2023-08-31 02:41:09,118 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 442 places, 1309 transitions, 33939 flow, removed 279 selfloop flow, removed 12 redundant places. [2023-08-31 02:41:09,144 INFO L231 Difference]: Finished difference. Result has 457 places, 1131 transitions, 29835 flow [2023-08-31 02:41:09,145 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=25991, PETRI_DIFFERENCE_MINUEND_PLACES=407, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1030, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=188, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=816, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=29835, PETRI_PLACES=457, PETRI_TRANSITIONS=1131} [2023-08-31 02:41:09,146 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 437 predicate places. [2023-08-31 02:41:09,146 INFO L495 AbstractCegarLoop]: Abstraction has has 457 places, 1131 transitions, 29835 flow [2023-08-31 02:41:09,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 63.75) internal successors, (1020), 16 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:41:09,147 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:41:09,147 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:41:09,168 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-08-31 02:41:09,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-08-31 02:41:09,352 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 02:41:09,353 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:41:09,353 INFO L85 PathProgramCache]: Analyzing trace with hash -2047021096, now seen corresponding path program 19 times [2023-08-31 02:41:09,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:41:09,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160870959] [2023-08-31 02:41:09,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:41:09,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:41:09,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:41:09,453 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:41:09,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:41:09,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160870959] [2023-08-31 02:41:09,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160870959] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:41:09,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4520237] [2023-08-31 02:41:09,454 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-31 02:41:09,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:41:09,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:41:09,457 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 02:41:09,459 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-08-31 02:41:09,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:41:09,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-31 02:41:09,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:41:09,573 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:41:09,573 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:41:09,664 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:41:09,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [4520237] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:41:09,665 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:41:09,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2023-08-31 02:41:09,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943539098] [2023-08-31 02:41:09,665 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:41:09,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-31 02:41:09,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:41:09,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-31 02:41:09,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2023-08-31 02:41:09,741 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 151 [2023-08-31 02:41:09,742 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 457 places, 1131 transitions, 29835 flow. Second operand has 16 states, 16 states have (on average 63.8125) internal successors, (1021), 16 states have internal predecessors, (1021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:41:09,742 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:41:09,742 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 151 [2023-08-31 02:41:09,742 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:41:13,839 INFO L130 PetriNetUnfolder]: 3929/7754 cut-off events. [2023-08-31 02:41:13,840 INFO L131 PetriNetUnfolder]: For 1847116/1847116 co-relation queries the response was YES. [2023-08-31 02:41:13,921 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108331 conditions, 7754 events. 3929/7754 cut-off events. For 1847116/1847116 co-relation queries the response was YES. Maximal size of possible extension queue 662. Compared 65401 event pairs, 1523 based on Foata normal form. 140/7894 useless extension candidates. Maximal degree in co-relation 107213. Up to 6927 conditions per place. [2023-08-31 02:41:13,961 INFO L137 encePairwiseOnDemand]: 145/151 looper letters, 1158 selfloop transitions, 186 changer transitions 4/1348 dead transitions. [2023-08-31 02:41:13,961 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 492 places, 1348 transitions, 35943 flow [2023-08-31 02:41:13,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-08-31 02:41:13,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-08-31 02:41:13,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 2440 transitions. [2023-08-31 02:41:13,966 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44885945548197204 [2023-08-31 02:41:13,966 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 2440 transitions. [2023-08-31 02:41:13,966 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 2440 transitions. [2023-08-31 02:41:13,966 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:41:13,967 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 2440 transitions. [2023-08-31 02:41:13,971 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 67.77777777777777) internal successors, (2440), 36 states have internal predecessors, (2440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:41:13,977 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 151.0) internal successors, (5587), 37 states have internal predecessors, (5587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:41:13,978 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 151.0) internal successors, (5587), 37 states have internal predecessors, (5587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:41:13,978 INFO L175 Difference]: Start difference. First operand has 457 places, 1131 transitions, 29835 flow. Second operand 36 states and 2440 transitions. [2023-08-31 02:41:13,978 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 492 places, 1348 transitions, 35943 flow [2023-08-31 02:41:21,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 477 places, 1348 transitions, 34927 flow, removed 427 selfloop flow, removed 15 redundant places. [2023-08-31 02:41:21,079 INFO L231 Difference]: Finished difference. Result has 493 places, 1210 transitions, 31314 flow [2023-08-31 02:41:21,080 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=28819, PETRI_DIFFERENCE_MINUEND_PLACES=442, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1000, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=31314, PETRI_PLACES=493, PETRI_TRANSITIONS=1210} [2023-08-31 02:41:21,081 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 473 predicate places. [2023-08-31 02:41:21,081 INFO L495 AbstractCegarLoop]: Abstraction has has 493 places, 1210 transitions, 31314 flow [2023-08-31 02:41:21,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 63.8125) internal successors, (1021), 16 states have internal predecessors, (1021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:41:21,081 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:41:21,081 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:41:21,090 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-08-31 02:41:21,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:41:21,286 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 02:41:21,286 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:41:21,286 INFO L85 PathProgramCache]: Analyzing trace with hash -447011944, now seen corresponding path program 20 times [2023-08-31 02:41:21,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:41:21,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363128385] [2023-08-31 02:41:21,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:41:21,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:41:21,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:41:21,436 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:41:21,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:41:21,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363128385] [2023-08-31 02:41:21,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363128385] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:41:21,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550397470] [2023-08-31 02:41:21,437 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 02:41:21,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:41:21,438 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:41:21,438 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 02:41:21,440 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-08-31 02:41:21,509 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 02:41:21,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 02:41:21,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-31 02:41:21,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:41:21,578 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:41:21,578 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:41:21,699 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:41:21,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [550397470] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:41:21,700 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:41:21,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2023-08-31 02:41:21,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481195707] [2023-08-31 02:41:21,700 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:41:21,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-31 02:41:21,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:41:21,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-31 02:41:21,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2023-08-31 02:41:21,859 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 151 [2023-08-31 02:41:21,860 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 493 places, 1210 transitions, 31314 flow. Second operand has 21 states, 21 states have (on average 63.61904761904762) internal successors, (1336), 21 states have internal predecessors, (1336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:41:21,860 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:41:21,860 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 151 [2023-08-31 02:41:21,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:41:27,743 INFO L130 PetriNetUnfolder]: 4369/8746 cut-off events. [2023-08-31 02:41:27,743 INFO L131 PetriNetUnfolder]: For 2475670/2475670 co-relation queries the response was YES. [2023-08-31 02:41:27,837 INFO L83 FinitePrefix]: Finished finitePrefix Result has 129968 conditions, 8746 events. 4369/8746 cut-off events. For 2475670/2475670 co-relation queries the response was YES. Maximal size of possible extension queue 765. Compared 76357 event pairs, 753 based on Foata normal form. 66/8812 useless extension candidates. Maximal degree in co-relation 128951. Up to 3024 conditions per place. [2023-08-31 02:41:27,875 INFO L137 encePairwiseOnDemand]: 146/151 looper letters, 654 selfloop transitions, 859 changer transitions 15/1528 dead transitions. [2023-08-31 02:41:27,875 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 526 places, 1528 transitions, 41320 flow [2023-08-31 02:41:27,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-08-31 02:41:27,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-08-31 02:41:27,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 2344 transitions. [2023-08-31 02:41:27,877 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4565640825866771 [2023-08-31 02:41:27,877 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 2344 transitions. [2023-08-31 02:41:27,878 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 2344 transitions. [2023-08-31 02:41:27,878 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:41:27,878 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 2344 transitions. [2023-08-31 02:41:27,880 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 68.94117647058823) internal successors, (2344), 34 states have internal predecessors, (2344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:41:27,882 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 151.0) internal successors, (5285), 35 states have internal predecessors, (5285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:41:27,883 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 151.0) internal successors, (5285), 35 states have internal predecessors, (5285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:41:27,883 INFO L175 Difference]: Start difference. First operand has 493 places, 1210 transitions, 31314 flow. Second operand 34 states and 2344 transitions. [2023-08-31 02:41:27,883 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 526 places, 1528 transitions, 41320 flow [2023-08-31 02:41:36,962 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 516 places, 1528 transitions, 39723 flow, removed 731 selfloop flow, removed 10 redundant places. [2023-08-31 02:41:36,989 INFO L231 Difference]: Finished difference. Result has 531 places, 1327 transitions, 36308 flow [2023-08-31 02:41:36,990 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=30014, PETRI_DIFFERENCE_MINUEND_PLACES=483, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=746, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=411, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=36308, PETRI_PLACES=531, PETRI_TRANSITIONS=1327} [2023-08-31 02:41:36,990 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 511 predicate places. [2023-08-31 02:41:36,990 INFO L495 AbstractCegarLoop]: Abstraction has has 531 places, 1327 transitions, 36308 flow [2023-08-31 02:41:36,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 63.61904761904762) internal successors, (1336), 21 states have internal predecessors, (1336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:41:36,991 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:41:36,991 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:41:36,997 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-08-31 02:41:37,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:41:37,192 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 02:41:37,193 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:41:37,193 INFO L85 PathProgramCache]: Analyzing trace with hash -431522972, now seen corresponding path program 21 times [2023-08-31 02:41:37,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:41:37,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710717332] [2023-08-31 02:41:37,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:41:37,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:41:37,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:41:37,351 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:41:37,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:41:37,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710717332] [2023-08-31 02:41:37,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710717332] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:41:37,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332923499] [2023-08-31 02:41:37,352 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 02:41:37,352 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:41:37,352 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:41:37,369 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 02:41:37,414 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-08-31 02:41:37,497 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-08-31 02:41:37,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 02:41:37,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-31 02:41:37,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:41:37,556 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:41:37,556 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:41:37,648 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:41:37,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [332923499] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:41:37,648 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:41:37,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2023-08-31 02:41:37,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615422980] [2023-08-31 02:41:37,648 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:41:37,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-31 02:41:37,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:41:37,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-31 02:41:37,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2023-08-31 02:41:37,790 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 151 [2023-08-31 02:41:37,791 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 531 places, 1327 transitions, 36308 flow. Second operand has 21 states, 21 states have (on average 63.57142857142857) internal successors, (1335), 21 states have internal predecessors, (1335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:41:37,791 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:41:37,791 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 151 [2023-08-31 02:41:37,791 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:41:41,134 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 02:41:45,608 INFO L130 PetriNetUnfolder]: 4343/8662 cut-off events. [2023-08-31 02:41:45,608 INFO L131 PetriNetUnfolder]: For 2683576/2683576 co-relation queries the response was YES. [2023-08-31 02:41:45,713 INFO L83 FinitePrefix]: Finished finitePrefix Result has 137974 conditions, 8662 events. 4343/8662 cut-off events. For 2683576/2683576 co-relation queries the response was YES. Maximal size of possible extension queue 756. Compared 75308 event pairs, 309 based on Foata normal form. 22/8684 useless extension candidates. Maximal degree in co-relation 136861. Up to 2242 conditions per place. [2023-08-31 02:41:45,758 INFO L137 encePairwiseOnDemand]: 145/151 looper letters, 462 selfloop transitions, 1043 changer transitions 20/1525 dead transitions. [2023-08-31 02:41:45,758 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 583 places, 1525 transitions, 43576 flow [2023-08-31 02:41:45,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2023-08-31 02:41:45,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2023-08-31 02:41:45,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 3532 transitions. [2023-08-31 02:41:45,761 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.441334499562664 [2023-08-31 02:41:45,762 INFO L72 ComplementDD]: Start complementDD. Operand 53 states and 3532 transitions. [2023-08-31 02:41:45,762 INFO L73 IsDeterministic]: Start isDeterministic. Operand 53 states and 3532 transitions. [2023-08-31 02:41:45,762 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:41:45,762 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 53 states and 3532 transitions. [2023-08-31 02:41:45,765 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 54 states, 53 states have (on average 66.64150943396227) internal successors, (3532), 53 states have internal predecessors, (3532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:41:45,769 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 54 states, 54 states have (on average 151.0) internal successors, (8154), 54 states have internal predecessors, (8154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:41:45,769 INFO L81 ComplementDD]: Finished complementDD. Result has 54 states, 54 states have (on average 151.0) internal successors, (8154), 54 states have internal predecessors, (8154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:41:45,769 INFO L175 Difference]: Start difference. First operand has 531 places, 1327 transitions, 36308 flow. Second operand 53 states and 3532 transitions. [2023-08-31 02:41:45,769 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 583 places, 1525 transitions, 43576 flow [2023-08-31 02:41:57,877 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 569 places, 1525 transitions, 42749 flow, removed 368 selfloop flow, removed 14 redundant places. [2023-08-31 02:41:57,905 INFO L231 Difference]: Finished difference. Result has 576 places, 1372 transitions, 39675 flow [2023-08-31 02:41:57,906 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=35525, PETRI_DIFFERENCE_MINUEND_PLACES=517, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1327, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1002, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=316, PETRI_DIFFERENCE_SUBTRAHEND_STATES=53, PETRI_FLOW=39675, PETRI_PLACES=576, PETRI_TRANSITIONS=1372} [2023-08-31 02:41:57,907 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 556 predicate places. [2023-08-31 02:41:57,907 INFO L495 AbstractCegarLoop]: Abstraction has has 576 places, 1372 transitions, 39675 flow [2023-08-31 02:41:57,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 63.57142857142857) internal successors, (1335), 21 states have internal predecessors, (1335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:41:57,907 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:41:57,907 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:41:57,912 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2023-08-31 02:41:58,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-08-31 02:41:58,112 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 02:41:58,113 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:41:58,113 INFO L85 PathProgramCache]: Analyzing trace with hash -1260313288, now seen corresponding path program 22 times [2023-08-31 02:41:58,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:41:58,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711074190] [2023-08-31 02:41:58,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:41:58,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:41:58,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:41:58,203 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:41:58,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:41:58,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711074190] [2023-08-31 02:41:58,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711074190] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:41:58,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737196914] [2023-08-31 02:41:58,204 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-31 02:41:58,204 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:41:58,204 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:41:58,205 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 02:41:58,207 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-08-31 02:41:58,265 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-31 02:41:58,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 02:41:58,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-31 02:41:58,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:41:58,319 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:41:58,319 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:41:58,400 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:41:58,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [737196914] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:41:58,400 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:41:58,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2023-08-31 02:41:58,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954942283] [2023-08-31 02:41:58,400 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:41:58,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-31 02:41:58,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:41:58,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-31 02:41:58,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2023-08-31 02:41:58,505 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 151 [2023-08-31 02:41:58,505 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 576 places, 1372 transitions, 39675 flow. Second operand has 17 states, 17 states have (on average 63.705882352941174) internal successors, (1083), 17 states have internal predecessors, (1083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:41:58,505 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:41:58,505 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 151 [2023-08-31 02:41:58,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:42:05,486 INFO L130 PetriNetUnfolder]: 4554/9035 cut-off events. [2023-08-31 02:42:05,486 INFO L131 PetriNetUnfolder]: For 2969489/2969489 co-relation queries the response was YES. [2023-08-31 02:42:05,603 INFO L83 FinitePrefix]: Finished finitePrefix Result has 145649 conditions, 9035 events. 4554/9035 cut-off events. For 2969489/2969489 co-relation queries the response was YES. Maximal size of possible extension queue 780. Compared 78522 event pairs, 1398 based on Foata normal form. 70/9105 useless extension candidates. Maximal degree in co-relation 144763. Up to 6692 conditions per place. [2023-08-31 02:42:05,650 INFO L137 encePairwiseOnDemand]: 146/151 looper letters, 1085 selfloop transitions, 463 changer transitions 21/1569 dead transitions. [2023-08-31 02:42:05,650 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 603 places, 1569 transitions, 47022 flow [2023-08-31 02:42:05,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-08-31 02:42:05,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-08-31 02:42:05,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 1969 transitions. [2023-08-31 02:42:05,652 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44964603790819824 [2023-08-31 02:42:05,652 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 1969 transitions. [2023-08-31 02:42:05,652 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 1969 transitions. [2023-08-31 02:42:05,653 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:42:05,653 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 1969 transitions. [2023-08-31 02:42:05,654 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 67.89655172413794) internal successors, (1969), 29 states have internal predecessors, (1969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:42:05,656 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 151.0) internal successors, (4530), 30 states have internal predecessors, (4530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:42:05,657 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 151.0) internal successors, (4530), 30 states have internal predecessors, (4530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:42:05,657 INFO L175 Difference]: Start difference. First operand has 576 places, 1372 transitions, 39675 flow. Second operand 29 states and 1969 transitions. [2023-08-31 02:42:05,657 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 603 places, 1569 transitions, 47022 flow [2023-08-31 02:42:19,355 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 584 places, 1569 transitions, 44869 flow, removed 842 selfloop flow, removed 19 redundant places. [2023-08-31 02:42:19,386 INFO L231 Difference]: Finished difference. Result has 592 places, 1442 transitions, 41737 flow [2023-08-31 02:42:19,388 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=37992, PETRI_DIFFERENCE_MINUEND_PLACES=556, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1370, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=399, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=933, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=41737, PETRI_PLACES=592, PETRI_TRANSITIONS=1442} [2023-08-31 02:42:19,388 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 572 predicate places. [2023-08-31 02:42:19,388 INFO L495 AbstractCegarLoop]: Abstraction has has 592 places, 1442 transitions, 41737 flow [2023-08-31 02:42:19,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 63.705882352941174) internal successors, (1083), 17 states have internal predecessors, (1083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:42:19,388 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:42:19,388 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:42:19,395 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-08-31 02:42:19,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-08-31 02:42:19,594 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 02:42:19,594 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:42:19,594 INFO L85 PathProgramCache]: Analyzing trace with hash 1434236764, now seen corresponding path program 23 times [2023-08-31 02:42:19,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:42:19,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972840866] [2023-08-31 02:42:19,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:42:19,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:42:19,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:42:19,706 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:42:19,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:42:19,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972840866] [2023-08-31 02:42:19,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972840866] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:42:19,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117540332] [2023-08-31 02:42:19,707 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-31 02:42:19,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:42:19,708 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:42:19,708 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 02:42:19,710 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-08-31 02:42:19,780 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-31 02:42:19,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 02:42:19,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2023-08-31 02:42:19,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:42:19,833 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 02:42:19,833 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:42:19,911 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 02:42:19,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [117540332] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:42:19,912 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:42:19,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-08-31 02:42:19,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048058235] [2023-08-31 02:42:19,912 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:42:19,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-31 02:42:19,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:42:19,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-31 02:42:19,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2023-08-31 02:42:19,989 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 151 [2023-08-31 02:42:19,990 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 592 places, 1442 transitions, 41737 flow. Second operand has 13 states, 13 states have (on average 68.46153846153847) internal successors, (890), 13 states have internal predecessors, (890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:42:19,990 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:42:19,990 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 151 [2023-08-31 02:42:19,990 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:42:26,256 INFO L130 PetriNetUnfolder]: 5686/11328 cut-off events. [2023-08-31 02:42:26,256 INFO L131 PetriNetUnfolder]: For 3857478/3857478 co-relation queries the response was YES. [2023-08-31 02:42:26,399 INFO L83 FinitePrefix]: Finished finitePrefix Result has 191662 conditions, 11328 events. 5686/11328 cut-off events. For 3857478/3857478 co-relation queries the response was YES. Maximal size of possible extension queue 966. Compared 102236 event pairs, 603 based on Foata normal form. 194/11522 useless extension candidates. Maximal degree in co-relation 190401. Up to 5610 conditions per place. [2023-08-31 02:42:26,449 INFO L137 encePairwiseOnDemand]: 146/151 looper letters, 1065 selfloop transitions, 701 changer transitions 149/1917 dead transitions. [2023-08-31 02:42:26,449 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 595 places, 1917 transitions, 59403 flow [2023-08-31 02:42:26,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-31 02:42:26,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-31 02:42:26,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 523 transitions. [2023-08-31 02:42:26,450 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49479659413434246 [2023-08-31 02:42:26,450 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 523 transitions. [2023-08-31 02:42:26,450 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 523 transitions. [2023-08-31 02:42:26,450 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:42:26,450 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 523 transitions. [2023-08-31 02:42:26,451 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 74.71428571428571) internal successors, (523), 7 states have internal predecessors, (523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:42:26,451 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 151.0) internal successors, (1208), 8 states have internal predecessors, (1208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:42:26,452 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 151.0) internal successors, (1208), 8 states have internal predecessors, (1208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:42:26,452 INFO L175 Difference]: Start difference. First operand has 592 places, 1442 transitions, 41737 flow. Second operand 7 states and 523 transitions. [2023-08-31 02:42:26,452 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 595 places, 1917 transitions, 59403 flow [2023-08-31 02:42:43,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 576 places, 1917 transitions, 58893 flow, removed 167 selfloop flow, removed 19 redundant places. [2023-08-31 02:42:43,338 INFO L231 Difference]: Finished difference. Result has 580 places, 1641 transitions, 52029 flow [2023-08-31 02:42:43,339 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=41214, PETRI_DIFFERENCE_MINUEND_PLACES=570, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1436, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=420, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=745, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=52029, PETRI_PLACES=580, PETRI_TRANSITIONS=1641} [2023-08-31 02:42:43,339 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 560 predicate places. [2023-08-31 02:42:43,339 INFO L495 AbstractCegarLoop]: Abstraction has has 580 places, 1641 transitions, 52029 flow [2023-08-31 02:42:43,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 68.46153846153847) internal successors, (890), 13 states have internal predecessors, (890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:42:43,340 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:42:43,340 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:42:43,347 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2023-08-31 02:42:43,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-08-31 02:42:43,545 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 02:42:43,545 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:42:43,545 INFO L85 PathProgramCache]: Analyzing trace with hash -145152391, now seen corresponding path program 24 times [2023-08-31 02:42:43,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:42:43,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004199282] [2023-08-31 02:42:43,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:42:43,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:42:43,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:42:43,665 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:42:43,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:42:43,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004199282] [2023-08-31 02:42:43,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004199282] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:42:43,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173369156] [2023-08-31 02:42:43,666 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-31 02:42:43,666 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:42:43,666 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:42:43,667 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 02:42:43,669 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-08-31 02:42:43,751 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-31 02:42:43,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 02:42:43,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-31 02:42:43,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:42:43,825 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:42:43,825 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:42:43,916 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:42:43,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1173369156] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:42:43,916 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:42:43,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 19 [2023-08-31 02:42:43,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674339433] [2023-08-31 02:42:43,916 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:42:43,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-31 02:42:43,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:42:43,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-31 02:42:43,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2023-08-31 02:42:44,057 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 151 [2023-08-31 02:42:44,058 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 580 places, 1641 transitions, 52029 flow. Second operand has 19 states, 19 states have (on average 63.94736842105263) internal successors, (1215), 19 states have internal predecessors, (1215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:42:44,058 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:42:44,058 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 151 [2023-08-31 02:42:44,058 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:42:56,242 INFO L130 PetriNetUnfolder]: 9340/18621 cut-off events. [2023-08-31 02:42:56,242 INFO L131 PetriNetUnfolder]: For 6470012/6470012 co-relation queries the response was YES. [2023-08-31 02:42:56,492 INFO L83 FinitePrefix]: Finished finitePrefix Result has 314644 conditions, 18621 events. 9340/18621 cut-off events. For 6470012/6470012 co-relation queries the response was YES. Maximal size of possible extension queue 1456. Compared 179437 event pairs, 1197 based on Foata normal form. 166/18787 useless extension candidates. Maximal degree in co-relation 312947. Up to 6831 conditions per place. [2023-08-31 02:42:56,582 INFO L137 encePairwiseOnDemand]: 146/151 looper letters, 2495 selfloop transitions, 630 changer transitions 2/3127 dead transitions. [2023-08-31 02:42:56,582 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 590 places, 3127 transitions, 101680 flow [2023-08-31 02:42:56,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-08-31 02:42:56,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-08-31 02:42:56,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1791 transitions. [2023-08-31 02:42:56,584 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45618950585838003 [2023-08-31 02:42:56,584 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 1791 transitions. [2023-08-31 02:42:56,584 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 1791 transitions. [2023-08-31 02:42:56,584 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:42:56,584 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 1791 transitions. [2023-08-31 02:42:56,586 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 68.88461538461539) internal successors, (1791), 26 states have internal predecessors, (1791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:42:56,587 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 151.0) internal successors, (4077), 27 states have internal predecessors, (4077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:42:56,588 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 151.0) internal successors, (4077), 27 states have internal predecessors, (4077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:42:56,588 INFO L175 Difference]: Start difference. First operand has 580 places, 1641 transitions, 52029 flow. Second operand 26 states and 1791 transitions. [2023-08-31 02:42:56,588 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 590 places, 3127 transitions, 101680 flow [2023-08-31 02:43:29,592 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 574 places, 3127 transitions, 100162 flow, removed 692 selfloop flow, removed 16 redundant places. [2023-08-31 02:43:29,644 INFO L231 Difference]: Finished difference. Result has 582 places, 2016 transitions, 64382 flow [2023-08-31 02:43:29,645 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=51163, PETRI_DIFFERENCE_MINUEND_PLACES=549, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1641, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=347, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=64382, PETRI_PLACES=582, PETRI_TRANSITIONS=2016} [2023-08-31 02:43:29,645 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 562 predicate places. [2023-08-31 02:43:29,645 INFO L495 AbstractCegarLoop]: Abstraction has has 582 places, 2016 transitions, 64382 flow [2023-08-31 02:43:29,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 63.94736842105263) internal successors, (1215), 19 states have internal predecessors, (1215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:43:29,646 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:43:29,646 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:43:29,655 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-08-31 02:43:29,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-08-31 02:43:29,851 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 02:43:29,851 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:43:29,851 INFO L85 PathProgramCache]: Analyzing trace with hash 2084131937, now seen corresponding path program 25 times [2023-08-31 02:43:29,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:43:29,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889675730] [2023-08-31 02:43:29,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:43:29,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:43:29,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:43:29,979 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:43:29,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:43:29,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889675730] [2023-08-31 02:43:29,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889675730] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:43:29,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946521013] [2023-08-31 02:43:29,980 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-31 02:43:29,980 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:43:29,981 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:43:29,981 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 02:43:29,983 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-08-31 02:43:30,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:43:30,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-31 02:43:30,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:43:30,117 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:43:30,117 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:43:30,244 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:43:30,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1946521013] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:43:30,244 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:43:30,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2023-08-31 02:43:30,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189386510] [2023-08-31 02:43:30,244 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:43:30,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-31 02:43:30,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:43:30,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-31 02:43:30,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=408, Unknown=0, NotChecked=0, Total=506 [2023-08-31 02:43:30,379 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 151 [2023-08-31 02:43:30,380 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 582 places, 2016 transitions, 64382 flow. Second operand has 23 states, 23 states have (on average 63.47826086956522) internal successors, (1460), 23 states have internal predecessors, (1460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:43:30,380 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:43:30,380 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 151 [2023-08-31 02:43:30,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:43:42,849 WARN L222 SmtUtils]: Spent 5.41s on a formula simplification. DAG size of input: 46 DAG size of output: 27 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-31 02:44:41,054 INFO L130 PetriNetUnfolder]: 10436/21121 cut-off events. [2023-08-31 02:44:41,055 INFO L131 PetriNetUnfolder]: For 7299485/7299485 co-relation queries the response was YES. [2023-08-31 02:44:41,341 INFO L83 FinitePrefix]: Finished finitePrefix Result has 377370 conditions, 21121 events. 10436/21121 cut-off events. For 7299485/7299485 co-relation queries the response was YES. Maximal size of possible extension queue 1625. Compared 210437 event pairs, 326 based on Foata normal form. 84/21205 useless extension candidates. Maximal degree in co-relation 375631. Up to 4533 conditions per place. [2023-08-31 02:44:41,448 INFO L137 encePairwiseOnDemand]: 145/151 looper letters, 785 selfloop transitions, 2966 changer transitions 72/3823 dead transitions. [2023-08-31 02:44:41,448 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 691 places, 3823 transitions, 129828 flow [2023-08-31 02:44:41,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2023-08-31 02:44:41,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2023-08-31 02:44:41,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 7444 transitions. [2023-08-31 02:44:41,453 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4481637567730283 [2023-08-31 02:44:41,453 INFO L72 ComplementDD]: Start complementDD. Operand 110 states and 7444 transitions. [2023-08-31 02:44:41,453 INFO L73 IsDeterministic]: Start isDeterministic. Operand 110 states and 7444 transitions. [2023-08-31 02:44:41,454 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:44:41,454 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 110 states and 7444 transitions. [2023-08-31 02:44:41,459 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 111 states, 110 states have (on average 67.67272727272727) internal successors, (7444), 110 states have internal predecessors, (7444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:44:41,467 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 111 states, 111 states have (on average 151.0) internal successors, (16761), 111 states have internal predecessors, (16761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:44:41,468 INFO L81 ComplementDD]: Finished complementDD. Result has 111 states, 111 states have (on average 151.0) internal successors, (16761), 111 states have internal predecessors, (16761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:44:41,468 INFO L175 Difference]: Start difference. First operand has 582 places, 2016 transitions, 64382 flow. Second operand 110 states and 7444 transitions. [2023-08-31 02:44:41,468 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 691 places, 3823 transitions, 129828 flow [2023-08-31 02:45:28,247 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 681 places, 3823 transitions, 127564 flow, removed 1034 selfloop flow, removed 10 redundant places. [2023-08-31 02:45:28,357 INFO L231 Difference]: Finished difference. Result has 718 places, 3250 transitions, 115680 flow [2023-08-31 02:45:28,358 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=62622, PETRI_DIFFERENCE_MINUEND_PLACES=572, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2016, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1781, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=110, PETRI_FLOW=115680, PETRI_PLACES=718, PETRI_TRANSITIONS=3250} [2023-08-31 02:45:28,359 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 698 predicate places. [2023-08-31 02:45:28,359 INFO L495 AbstractCegarLoop]: Abstraction has has 718 places, 3250 transitions, 115680 flow [2023-08-31 02:45:28,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 63.47826086956522) internal successors, (1460), 23 states have internal predecessors, (1460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:45:28,360 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:45:28,360 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:45:28,365 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-08-31 02:45:28,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:45:28,561 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 02:45:28,561 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:45:28,561 INFO L85 PathProgramCache]: Analyzing trace with hash 1255341621, now seen corresponding path program 26 times [2023-08-31 02:45:28,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:45:28,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252467019] [2023-08-31 02:45:28,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:45:28,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:45:28,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:45:28,680 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:45:28,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:45:28,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252467019] [2023-08-31 02:45:28,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252467019] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:45:28,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49863355] [2023-08-31 02:45:28,681 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 02:45:28,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:45:28,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:45:28,682 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 02:45:28,684 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-08-31 02:45:28,748 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 02:45:28,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 02:45:28,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-31 02:45:28,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:45:28,825 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:45:28,826 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:45:28,950 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:45:28,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [49863355] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:45:28,950 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:45:28,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2023-08-31 02:45:28,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539915001] [2023-08-31 02:45:28,950 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:45:28,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-31 02:45:28,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:45:28,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-31 02:45:28,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2023-08-31 02:45:29,120 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 151 [2023-08-31 02:45:29,121 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 718 places, 3250 transitions, 115680 flow. Second operand has 22 states, 22 states have (on average 63.54545454545455) internal successors, (1398), 22 states have internal predecessors, (1398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:45:29,121 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:45:29,121 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 151 [2023-08-31 02:45:29,121 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:45:32,191 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 02:46:07,684 INFO L130 PetriNetUnfolder]: 12396/25172 cut-off events. [2023-08-31 02:46:07,684 INFO L131 PetriNetUnfolder]: For 17524168/17524168 co-relation queries the response was YES. [2023-08-31 02:46:08,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 517059 conditions, 25172 events. 12396/25172 cut-off events. For 17524168/17524168 co-relation queries the response was YES. Maximal size of possible extension queue 1852. Compared 257407 event pairs, 1257 based on Foata normal form. 630/25802 useless extension candidates. Maximal degree in co-relation 514695. Up to 5707 conditions per place. [2023-08-31 02:46:08,260 INFO L137 encePairwiseOnDemand]: 146/151 looper letters, 2437 selfloop transitions, 1987 changer transitions 90/4514 dead transitions. [2023-08-31 02:46:08,260 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 791 places, 4514 transitions, 161950 flow [2023-08-31 02:46:08,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2023-08-31 02:46:08,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2023-08-31 02:46:08,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 5111 transitions. [2023-08-31 02:46:08,264 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45130242825607064 [2023-08-31 02:46:08,264 INFO L72 ComplementDD]: Start complementDD. Operand 75 states and 5111 transitions. [2023-08-31 02:46:08,264 INFO L73 IsDeterministic]: Start isDeterministic. Operand 75 states and 5111 transitions. [2023-08-31 02:46:08,265 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:46:08,265 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 75 states and 5111 transitions. [2023-08-31 02:46:08,268 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 76 states, 75 states have (on average 68.14666666666666) internal successors, (5111), 75 states have internal predecessors, (5111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:46:08,273 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 76 states, 76 states have (on average 151.0) internal successors, (11476), 76 states have internal predecessors, (11476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:46:08,274 INFO L81 ComplementDD]: Finished complementDD. Result has 76 states, 76 states have (on average 151.0) internal successors, (11476), 76 states have internal predecessors, (11476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:46:08,274 INFO L175 Difference]: Start difference. First operand has 718 places, 3250 transitions, 115680 flow. Second operand 75 states and 5111 transitions. [2023-08-31 02:46:08,274 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 791 places, 4514 transitions, 161950 flow [2023-08-31 02:48:50,335 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 765 places, 4514 transitions, 145713 flow, removed 7641 selfloop flow, removed 26 redundant places. [2023-08-31 02:48:50,434 INFO L231 Difference]: Finished difference. Result has 800 places, 3816 transitions, 129047 flow [2023-08-31 02:48:50,437 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=103467, PETRI_DIFFERENCE_MINUEND_PLACES=691, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1489, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1733, PETRI_DIFFERENCE_SUBTRAHEND_STATES=75, PETRI_FLOW=129047, PETRI_PLACES=800, PETRI_TRANSITIONS=3816} [2023-08-31 02:48:50,437 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 780 predicate places. [2023-08-31 02:48:50,437 INFO L495 AbstractCegarLoop]: Abstraction has has 800 places, 3816 transitions, 129047 flow [2023-08-31 02:48:50,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 63.54545454545455) internal successors, (1398), 22 states have internal predecessors, (1398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:48:50,438 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:48:50,438 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:48:50,443 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-08-31 02:48:50,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:48:50,643 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 02:48:50,643 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:48:50,643 INFO L85 PathProgramCache]: Analyzing trace with hash 2082942645, now seen corresponding path program 27 times [2023-08-31 02:48:50,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:48:50,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397828162] [2023-08-31 02:48:50,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:48:50,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:48:50,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:48:50,807 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:48:50,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:48:50,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397828162] [2023-08-31 02:48:50,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397828162] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:48:50,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16855210] [2023-08-31 02:48:50,808 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-31 02:48:50,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:48:50,808 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:48:50,809 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 02:48:50,814 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-08-31 02:48:50,889 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-08-31 02:48:50,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 02:48:50,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-31 02:48:50,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:48:50,997 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:48:50,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:48:51,139 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:48:51,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [16855210] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:48:51,140 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:48:51,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2023-08-31 02:48:51,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461207511] [2023-08-31 02:48:51,140 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:48:51,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-31 02:48:51,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:48:51,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-31 02:48:51,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2023-08-31 02:48:51,316 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 151 [2023-08-31 02:48:51,317 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 800 places, 3816 transitions, 129047 flow. Second operand has 23 states, 23 states have (on average 63.47826086956522) internal successors, (1460), 23 states have internal predecessors, (1460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:48:51,317 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:48:51,317 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 151 [2023-08-31 02:48:51,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:48:55,740 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-31 02:49:56,214 INFO L130 PetriNetUnfolder]: 13497/27696 cut-off events. [2023-08-31 02:49:56,214 INFO L131 PetriNetUnfolder]: For 22535669/22535669 co-relation queries the response was YES. [2023-08-31 02:49:56,752 INFO L83 FinitePrefix]: Finished finitePrefix Result has 608026 conditions, 27696 events. 13497/27696 cut-off events. For 22535669/22535669 co-relation queries the response was YES. Maximal size of possible extension queue 1956. Compared 288121 event pairs, 826 based on Foata normal form. 246/27942 useless extension candidates. Maximal degree in co-relation 606339. Up to 5833 conditions per place. [2023-08-31 02:49:56,911 INFO L137 encePairwiseOnDemand]: 146/151 looper letters, 1487 selfloop transitions, 3181 changer transitions 25/4693 dead transitions. [2023-08-31 02:49:56,912 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 892 places, 4693 transitions, 162082 flow [2023-08-31 02:49:56,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2023-08-31 02:49:56,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2023-08-31 02:49:56,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 6362 transitions. [2023-08-31 02:49:56,916 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4530371003346863 [2023-08-31 02:49:56,916 INFO L72 ComplementDD]: Start complementDD. Operand 93 states and 6362 transitions. [2023-08-31 02:49:56,916 INFO L73 IsDeterministic]: Start isDeterministic. Operand 93 states and 6362 transitions. [2023-08-31 02:49:56,917 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:49:56,917 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 93 states and 6362 transitions. [2023-08-31 02:49:56,921 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 94 states, 93 states have (on average 68.40860215053763) internal successors, (6362), 93 states have internal predecessors, (6362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:49:56,927 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 94 states, 94 states have (on average 151.0) internal successors, (14194), 94 states have internal predecessors, (14194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:49:56,927 INFO L81 ComplementDD]: Finished complementDD. Result has 94 states, 94 states have (on average 151.0) internal successors, (14194), 94 states have internal predecessors, (14194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:49:56,928 INFO L175 Difference]: Start difference. First operand has 800 places, 3816 transitions, 129047 flow. Second operand 93 states and 6362 transitions. [2023-08-31 02:49:56,928 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 892 places, 4693 transitions, 162082 flow [2023-08-31 02:52:57,534 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 868 places, 4693 transitions, 156939 flow, removed 2060 selfloop flow, removed 24 redundant places. [2023-08-31 02:52:57,633 INFO L231 Difference]: Finished difference. Result has 891 places, 4081 transitions, 140787 flow [2023-08-31 02:52:57,635 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=123676, PETRI_DIFFERENCE_MINUEND_PLACES=776, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3800, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2909, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=889, PETRI_DIFFERENCE_SUBTRAHEND_STATES=93, PETRI_FLOW=140787, PETRI_PLACES=891, PETRI_TRANSITIONS=4081} [2023-08-31 02:52:57,636 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 871 predicate places. [2023-08-31 02:52:57,636 INFO L495 AbstractCegarLoop]: Abstraction has has 891 places, 4081 transitions, 140787 flow [2023-08-31 02:52:57,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 63.47826086956522) internal successors, (1460), 23 states have internal predecessors, (1460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:52:57,636 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:52:57,636 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-31 02:52:57,641 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2023-08-31 02:52:57,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2023-08-31 02:52:57,837 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-31 02:52:57,837 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:52:57,837 INFO L85 PathProgramCache]: Analyzing trace with hash -920955701, now seen corresponding path program 28 times [2023-08-31 02:52:57,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:52:57,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922444250] [2023-08-31 02:52:57,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:52:57,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:52:57,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:52:57,962 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:52:57,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:52:57,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922444250] [2023-08-31 02:52:57,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922444250] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:52:57,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074640149] [2023-08-31 02:52:57,963 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-31 02:52:57,964 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:52:57,964 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:52:57,965 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-31 02:52:57,969 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-08-31 02:52:58,031 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-31 02:52:58,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 02:52:58,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-31 02:52:58,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:52:58,110 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:52:58,110 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:52:58,232 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:52:58,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2074640149] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:52:58,232 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:52:58,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2023-08-31 02:52:58,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509770879] [2023-08-31 02:52:58,232 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:52:58,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-31 02:52:58,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:52:58,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-31 02:52:58,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2023-08-31 02:52:58,357 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 151 [2023-08-31 02:52:58,358 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 891 places, 4081 transitions, 140787 flow. Second operand has 21 states, 21 states have (on average 63.666666666666664) internal successors, (1337), 21 states have internal predecessors, (1337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:52:58,358 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:52:58,358 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 151 [2023-08-31 02:52:58,358 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:53:55,495 INFO L130 PetriNetUnfolder]: 13856/28341 cut-off events. [2023-08-31 02:53:55,495 INFO L131 PetriNetUnfolder]: For 28778606/28778606 co-relation queries the response was YES. [2023-08-31 02:53:56,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 662355 conditions, 28341 events. 13856/28341 cut-off events. For 28778606/28778606 co-relation queries the response was YES. Maximal size of possible extension queue 2018. Compared 294813 event pairs, 2065 based on Foata normal form. 188/28529 useless extension candidates. Maximal degree in co-relation 660509. Up to 12325 conditions per place. [2023-08-31 02:53:56,317 INFO L137 encePairwiseOnDemand]: 146/151 looper letters, 3454 selfloop transitions, 1191 changer transitions 46/4691 dead transitions. [2023-08-31 02:53:56,317 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 954 places, 4691 transitions, 164162 flow [2023-08-31 02:53:56,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2023-08-31 02:53:56,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2023-08-31 02:53:56,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 4360 transitions. [2023-08-31 02:53:56,320 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.451158940397351 [2023-08-31 02:53:56,320 INFO L72 ComplementDD]: Start complementDD. Operand 64 states and 4360 transitions. [2023-08-31 02:53:56,320 INFO L73 IsDeterministic]: Start isDeterministic. Operand 64 states and 4360 transitions. [2023-08-31 02:53:56,320 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:53:56,320 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 64 states and 4360 transitions. [2023-08-31 02:53:56,323 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 65 states, 64 states have (on average 68.125) internal successors, (4360), 64 states have internal predecessors, (4360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:53:56,327 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 65 states, 65 states have (on average 151.0) internal successors, (9815), 65 states have internal predecessors, (9815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:53:56,327 INFO L81 ComplementDD]: Finished complementDD. Result has 65 states, 65 states have (on average 151.0) internal successors, (9815), 65 states have internal predecessors, (9815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:53:56,327 INFO L175 Difference]: Start difference. First operand has 891 places, 4081 transitions, 140787 flow. Second operand 64 states and 4360 transitions. [2023-08-31 02:53:56,328 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 954 places, 4691 transitions, 164162 flow Killed by 15