./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/popl20-bad-threaded-sum-2.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/weaver/popl20-bad-threaded-sum-2.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 e4c79b7a5b8db7237eb9e98d6143d48d2d4ec5b8465b95c5ccb44c5e387749db --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 20:00:52,781 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 20:00:52,783 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 20:00:52,816 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 20:00:52,817 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 20:00:52,819 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 20:00:52,820 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 20:00:52,823 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 20:00:52,824 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 20:00:52,828 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 20:00:52,828 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 20:00:52,830 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 20:00:52,831 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 20:00:52,832 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 20:00:52,833 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 20:00:52,837 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 20:00:52,838 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 20:00:52,839 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 20:00:52,840 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 20:00:52,843 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 20:00:52,844 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 20:00:52,850 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 20:00:52,850 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 20:00:52,851 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 20:00:52,856 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 20:00:52,856 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 20:00:52,856 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 20:00:52,858 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 20:00:52,859 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 20:00:52,859 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 20:00:52,860 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 20:00:52,861 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 20:00:52,862 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 20:00:52,863 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 20:00:52,863 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 20:00:52,863 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 20:00:52,864 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 20:00:52,864 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 20:00:52,864 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 20:00:52,865 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 20:00:52,865 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 20:00:52,867 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-30 20:00:52,891 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 20:00:52,891 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 20:00:52,892 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 20:00:52,892 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 20:00:52,892 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 20:00:52,893 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 20:00:52,893 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 20:00:52,893 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 20:00:52,893 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 20:00:52,893 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 20:00:52,894 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 20:00:52,894 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 20:00:52,894 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 20:00:52,894 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 20:00:52,895 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-30 20:00:52,895 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 20:00:52,895 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-30 20:00:52,895 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 20:00:52,895 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-30 20:00:52,895 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 20:00:52,895 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-30 20:00:52,895 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 20:00:52,896 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 20:00:52,896 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 20:00:52,896 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 20:00:52,896 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 20:00:52,896 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 20:00:52,896 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-30 20:00:52,896 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 20:00:52,897 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 20:00:52,897 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 20:00:52,897 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-30 20:00:52,897 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 20:00:52,897 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 20:00:52,897 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 20:00:52,897 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e4c79b7a5b8db7237eb9e98d6143d48d2d4ec5b8465b95c5ccb44c5e387749db Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 20:00:53,143 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 20:00:53,162 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 20:00:53,165 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 20:00:53,165 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 20:00:53,166 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 20:00:53,166 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-bad-threaded-sum-2.wvr.c [2023-08-30 20:00:54,102 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 20:00:54,269 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 20:00:54,270 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-threaded-sum-2.wvr.c [2023-08-30 20:00:54,274 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9ba4b44fa/640a26259e3b4be79d29ada9d571f5df/FLAG1892412d3 [2023-08-30 20:00:54,285 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9ba4b44fa/640a26259e3b4be79d29ada9d571f5df [2023-08-30 20:00:54,287 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 20:00:54,288 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 20:00:54,290 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 20:00:54,291 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 20:00:54,293 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 20:00:54,293 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 08:00:54" (1/1) ... [2023-08-30 20:00:54,294 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f7aedd6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:00:54, skipping insertion in model container [2023-08-30 20:00:54,294 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 08:00:54" (1/1) ... [2023-08-30 20:00:54,299 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 20:00:54,314 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 20:00:54,415 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-bad-threaded-sum-2.wvr.c[2476,2489] [2023-08-30 20:00:54,418 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 20:00:54,423 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 20:00:54,436 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-bad-threaded-sum-2.wvr.c[2476,2489] [2023-08-30 20:00:54,437 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 20:00:54,441 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 20:00:54,442 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 20:00:54,446 INFO L208 MainTranslator]: Completed translation [2023-08-30 20:00:54,446 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:00:54 WrapperNode [2023-08-30 20:00:54,446 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 20:00:54,447 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 20:00:54,447 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 20:00:54,447 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 20:00:54,451 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:00:54" (1/1) ... [2023-08-30 20:00:54,456 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:00:54" (1/1) ... [2023-08-30 20:00:54,466 INFO L138 Inliner]: procedures = 21, calls = 34, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 61 [2023-08-30 20:00:54,466 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 20:00:54,467 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 20:00:54,467 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 20:00:54,467 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 20:00:54,472 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:00:54" (1/1) ... [2023-08-30 20:00:54,472 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:00:54" (1/1) ... [2023-08-30 20:00:54,474 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:00:54" (1/1) ... [2023-08-30 20:00:54,474 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:00:54" (1/1) ... [2023-08-30 20:00:54,477 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:00:54" (1/1) ... [2023-08-30 20:00:54,479 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:00:54" (1/1) ... [2023-08-30 20:00:54,479 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:00:54" (1/1) ... [2023-08-30 20:00:54,480 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:00:54" (1/1) ... [2023-08-30 20:00:54,481 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 20:00:54,482 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 20:00:54,482 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 20:00:54,482 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 20:00:54,482 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:00:54" (1/1) ... [2023-08-30 20:00:54,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 20:00:54,504 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:00:54,513 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-30 20:00:54,526 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-30 20:00:54,558 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 20:00:54,558 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-30 20:00:54,558 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-30 20:00:54,558 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-30 20:00:54,558 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-30 20:00:54,558 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 20:00:54,558 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 20:00:54,559 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 20:00:54,559 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-30 20:00:54,559 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-30 20:00:54,559 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 20:00:54,559 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 20:00:54,559 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 20:00:54,559 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 20:00:54,560 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-30 20:00:54,677 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 20:00:54,678 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 20:00:54,889 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 20:00:54,926 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 20:00:54,926 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-08-30 20:00:54,928 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 08:00:54 BoogieIcfgContainer [2023-08-30 20:00:54,928 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 20:00:54,929 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 20:00:54,929 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 20:00:54,932 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 20:00:54,932 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 08:00:54" (1/3) ... [2023-08-30 20:00:54,932 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34edf665 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 08:00:54, skipping insertion in model container [2023-08-30 20:00:54,933 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:00:54" (2/3) ... [2023-08-30 20:00:54,933 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34edf665 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 08:00:54, skipping insertion in model container [2023-08-30 20:00:54,933 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 08:00:54" (3/3) ... [2023-08-30 20:00:54,934 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-threaded-sum-2.wvr.c [2023-08-30 20:00:54,947 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-30 20:00:54,953 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 20:00:54,953 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-30 20:00:54,953 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 20:00:55,024 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-30 20:00:55,059 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 84 places, 83 transitions, 182 flow [2023-08-30 20:00:55,109 INFO L130 PetriNetUnfolder]: 6/81 cut-off events. [2023-08-30 20:00:55,109 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 20:00:55,113 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90 conditions, 81 events. 6/81 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 41 event pairs, 0 based on Foata normal form. 0/74 useless extension candidates. Maximal degree in co-relation 49. Up to 2 conditions per place. [2023-08-30 20:00:55,113 INFO L82 GeneralOperation]: Start removeDead. Operand has 84 places, 83 transitions, 182 flow [2023-08-30 20:00:55,118 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 74 places, 73 transitions, 158 flow [2023-08-30 20:00:55,122 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 20:00:55,129 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 74 places, 73 transitions, 158 flow [2023-08-30 20:00:55,131 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 74 places, 73 transitions, 158 flow [2023-08-30 20:00:55,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 74 places, 73 transitions, 158 flow [2023-08-30 20:00:55,149 INFO L130 PetriNetUnfolder]: 6/73 cut-off events. [2023-08-30 20:00:55,152 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 20:00:55,153 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82 conditions, 73 events. 6/73 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 40 event pairs, 0 based on Foata normal form. 0/67 useless extension candidates. Maximal degree in co-relation 49. Up to 2 conditions per place. [2023-08-30 20:00:55,154 INFO L119 LiptonReduction]: Number of co-enabled transitions 396 [2023-08-30 20:00:56,645 INFO L134 LiptonReduction]: Checked pairs total: 617 [2023-08-30 20:00:56,645 INFO L136 LiptonReduction]: Total number of compositions: 65 [2023-08-30 20:00:56,663 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 20:00:56,667 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;@3b109aac, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 20:00:56,667 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-30 20:00:56,687 INFO L130 PetriNetUnfolder]: 2/16 cut-off events. [2023-08-30 20:00:56,687 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 20:00:56,687 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:00:56,688 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:00:56,688 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:00:56,694 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:00:56,694 INFO L85 PathProgramCache]: Analyzing trace with hash 1488220568, now seen corresponding path program 1 times [2023-08-30 20:00:56,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:00:56,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551666318] [2023-08-30 20:00:56,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:00:56,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:00:56,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:00:57,192 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:00:57,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:00:57,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551666318] [2023-08-30 20:00:57,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551666318] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 20:00:57,194 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 20:00:57,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 20:00:57,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013523222] [2023-08-30 20:00:57,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 20:00:57,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 20:00:57,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:00:57,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 20:00:57,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 20:00:57,253 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 148 [2023-08-30 20:00:57,255 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 17 transitions, 46 flow. Second operand has 4 states, 4 states have (on average 67.0) internal successors, (268), 4 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:00:57,255 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:00:57,255 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 148 [2023-08-30 20:00:57,256 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:00:57,321 INFO L130 PetriNetUnfolder]: 72/130 cut-off events. [2023-08-30 20:00:57,321 INFO L131 PetriNetUnfolder]: For 17/17 co-relation queries the response was YES. [2023-08-30 20:00:57,322 INFO L83 FinitePrefix]: Finished finitePrefix Result has 276 conditions, 130 events. 72/130 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 368 event pairs, 11 based on Foata normal form. 0/100 useless extension candidates. Maximal degree in co-relation 207. Up to 100 conditions per place. [2023-08-30 20:00:57,325 INFO L137 encePairwiseOnDemand]: 143/148 looper letters, 24 selfloop transitions, 5 changer transitions 0/31 dead transitions. [2023-08-30 20:00:57,325 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 31 transitions, 141 flow [2023-08-30 20:00:57,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 20:00:57,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 20:00:57,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 286 transitions. [2023-08-30 20:00:57,341 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4831081081081081 [2023-08-30 20:00:57,342 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 286 transitions. [2023-08-30 20:00:57,343 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 286 transitions. [2023-08-30 20:00:57,345 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:00:57,347 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 286 transitions. [2023-08-30 20:00:57,351 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 71.5) internal successors, (286), 4 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:00:57,354 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 148.0) internal successors, (740), 5 states have internal predecessors, (740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:00:57,355 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 148.0) internal successors, (740), 5 states have internal predecessors, (740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:00:57,356 INFO L175 Difference]: Start difference. First operand has 22 places, 17 transitions, 46 flow. Second operand 4 states and 286 transitions. [2023-08-30 20:00:57,356 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 31 transitions, 141 flow [2023-08-30 20:00:57,358 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 31 transitions, 127 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-30 20:00:57,359 INFO L231 Difference]: Finished difference. Result has 23 places, 21 transitions, 70 flow [2023-08-30 20:00:57,360 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=148, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=70, PETRI_PLACES=23, PETRI_TRANSITIONS=21} [2023-08-30 20:00:57,362 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 1 predicate places. [2023-08-30 20:00:57,363 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 21 transitions, 70 flow [2023-08-30 20:00:57,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 67.0) internal successors, (268), 4 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:00:57,363 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:00:57,364 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:00:57,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 20:00:57,366 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:00:57,366 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:00:57,367 INFO L85 PathProgramCache]: Analyzing trace with hash 258564523, now seen corresponding path program 1 times [2023-08-30 20:00:57,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:00:57,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902974637] [2023-08-30 20:00:57,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:00:57,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:00:57,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:00:57,536 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:00:57,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:00:57,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902974637] [2023-08-30 20:00:57,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902974637] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:00:57,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901191338] [2023-08-30 20:00:57,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:00:57,537 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:00:57,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:00:57,539 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:00:57,582 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-30 20:00:57,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:00:57,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-30 20:00:57,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:00:57,853 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:00:57,853 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:00:58,062 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:00:58,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [901191338] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:00:58,063 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:00:58,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 9 [2023-08-30 20:00:58,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397850282] [2023-08-30 20:00:58,064 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:00:58,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 20:00:58,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:00:58,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 20:00:58,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2023-08-30 20:00:58,123 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 148 [2023-08-30 20:00:58,124 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 21 transitions, 70 flow. Second operand has 10 states, 10 states have (on average 63.0) internal successors, (630), 10 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:00:58,124 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:00:58,124 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 148 [2023-08-30 20:00:58,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:00:58,298 INFO L130 PetriNetUnfolder]: 111/200 cut-off events. [2023-08-30 20:00:58,298 INFO L131 PetriNetUnfolder]: For 31/31 co-relation queries the response was YES. [2023-08-30 20:00:58,299 INFO L83 FinitePrefix]: Finished finitePrefix Result has 503 conditions, 200 events. 111/200 cut-off events. For 31/31 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 547 event pairs, 4 based on Foata normal form. 20/202 useless extension candidates. Maximal degree in co-relation 161. Up to 66 conditions per place. [2023-08-30 20:00:58,300 INFO L137 encePairwiseOnDemand]: 139/148 looper letters, 44 selfloop transitions, 18 changer transitions 0/62 dead transitions. [2023-08-30 20:00:58,300 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 62 transitions, 307 flow [2023-08-30 20:00:58,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 20:00:58,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 20:00:58,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 788 transitions. [2023-08-30 20:00:58,302 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4436936936936937 [2023-08-30 20:00:58,303 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 788 transitions. [2023-08-30 20:00:58,303 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 788 transitions. [2023-08-30 20:00:58,303 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:00:58,303 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 788 transitions. [2023-08-30 20:00:58,305 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 65.66666666666667) internal successors, (788), 12 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:00:58,307 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 148.0) internal successors, (1924), 13 states have internal predecessors, (1924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:00:58,308 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 148.0) internal successors, (1924), 13 states have internal predecessors, (1924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:00:58,308 INFO L175 Difference]: Start difference. First operand has 23 places, 21 transitions, 70 flow. Second operand 12 states and 788 transitions. [2023-08-30 20:00:58,308 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 62 transitions, 307 flow [2023-08-30 20:00:58,309 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 62 transitions, 307 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 20:00:58,310 INFO L231 Difference]: Finished difference. Result has 40 places, 32 transitions, 174 flow [2023-08-30 20:00:58,310 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=148, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=174, PETRI_PLACES=40, PETRI_TRANSITIONS=32} [2023-08-30 20:00:58,310 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 18 predicate places. [2023-08-30 20:00:58,311 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 32 transitions, 174 flow [2023-08-30 20:00:58,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 63.0) internal successors, (630), 10 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:00:58,311 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:00:58,311 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:00:58,317 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-30 20:00:58,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:00:58,517 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:00:58,517 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:00:58,517 INFO L85 PathProgramCache]: Analyzing trace with hash -800121287, now seen corresponding path program 1 times [2023-08-30 20:00:58,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:00:58,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58666170] [2023-08-30 20:00:58,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:00:58,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:00:58,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:00:59,035 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:00:59,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:00:59,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58666170] [2023-08-30 20:00:59,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58666170] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:00:59,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775436041] [2023-08-30 20:00:59,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:00:59,039 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:00:59,039 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:00:59,040 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:00:59,095 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-30 20:00:59,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:00:59,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 26 conjunts are in the unsatisfiable core [2023-08-30 20:00:59,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:00:59,444 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:00:59,444 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:00:59,748 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:00:59,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [775436041] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:00:59,748 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:00:59,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2023-08-30 20:00:59,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469415119] [2023-08-30 20:00:59,749 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:00:59,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-30 20:00:59,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:00:59,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-30 20:00:59,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=280, Unknown=0, NotChecked=0, Total=380 [2023-08-30 20:00:59,999 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 148 [2023-08-30 20:01:00,000 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 32 transitions, 174 flow. Second operand has 20 states, 20 states have (on average 56.25) internal successors, (1125), 20 states have internal predecessors, (1125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:01:00,000 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:01:00,000 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 148 [2023-08-30 20:01:00,001 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:01:01,323 INFO L130 PetriNetUnfolder]: 429/757 cut-off events. [2023-08-30 20:01:01,323 INFO L131 PetriNetUnfolder]: For 1007/1007 co-relation queries the response was YES. [2023-08-30 20:01:01,327 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2625 conditions, 757 events. 429/757 cut-off events. For 1007/1007 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 3338 event pairs, 12 based on Foata normal form. 5/762 useless extension candidates. Maximal degree in co-relation 1497. Up to 203 conditions per place. [2023-08-30 20:01:01,330 INFO L137 encePairwiseOnDemand]: 138/148 looper letters, 97 selfloop transitions, 94 changer transitions 34/225 dead transitions. [2023-08-30 20:01:01,330 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 225 transitions, 1551 flow [2023-08-30 20:01:01,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-08-30 20:01:01,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-08-30 20:01:01,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 2195 transitions. [2023-08-30 20:01:01,345 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4008400292184076 [2023-08-30 20:01:01,347 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 2195 transitions. [2023-08-30 20:01:01,347 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 2195 transitions. [2023-08-30 20:01:01,348 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:01:01,349 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 2195 transitions. [2023-08-30 20:01:01,356 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 59.32432432432432) internal successors, (2195), 37 states have internal predecessors, (2195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:01:01,365 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 148.0) internal successors, (5624), 38 states have internal predecessors, (5624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:01:01,367 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 148.0) internal successors, (5624), 38 states have internal predecessors, (5624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:01:01,367 INFO L175 Difference]: Start difference. First operand has 40 places, 32 transitions, 174 flow. Second operand 37 states and 2195 transitions. [2023-08-30 20:01:01,367 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 225 transitions, 1551 flow [2023-08-30 20:01:01,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 225 transitions, 1496 flow, removed 21 selfloop flow, removed 3 redundant places. [2023-08-30 20:01:01,379 INFO L231 Difference]: Finished difference. Result has 92 places, 127 transitions, 1097 flow [2023-08-30 20:01:01,380 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=148, PETRI_DIFFERENCE_MINUEND_FLOW=157, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=1097, PETRI_PLACES=92, PETRI_TRANSITIONS=127} [2023-08-30 20:01:01,381 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 70 predicate places. [2023-08-30 20:01:01,381 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 127 transitions, 1097 flow [2023-08-30 20:01:01,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 56.25) internal successors, (1125), 20 states have internal predecessors, (1125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:01:01,385 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:01:01,385 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:01:01,405 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-30 20:01:01,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-08-30 20:01:01,590 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:01:01,591 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:01:01,591 INFO L85 PathProgramCache]: Analyzing trace with hash -1631516584, now seen corresponding path program 2 times [2023-08-30 20:01:01,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:01:01,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820220780] [2023-08-30 20:01:01,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:01:01,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:01:01,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:01:01,737 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:01:01,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:01:01,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820220780] [2023-08-30 20:01:01,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820220780] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 20:01:01,738 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 20:01:01,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 20:01:01,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56294291] [2023-08-30 20:01:01,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 20:01:01,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 20:01:01,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:01:01,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 20:01:01,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 20:01:01,761 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 148 [2023-08-30 20:01:01,762 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 127 transitions, 1097 flow. Second operand has 5 states, 5 states have (on average 66.2) internal successors, (331), 5 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:01:01,762 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:01:01,762 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 148 [2023-08-30 20:01:01,762 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:01:01,933 INFO L130 PetriNetUnfolder]: 503/890 cut-off events. [2023-08-30 20:01:01,934 INFO L131 PetriNetUnfolder]: For 4815/4815 co-relation queries the response was YES. [2023-08-30 20:01:01,936 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4378 conditions, 890 events. 503/890 cut-off events. For 4815/4815 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 4060 event pairs, 72 based on Foata normal form. 8/898 useless extension candidates. Maximal degree in co-relation 4308. Up to 343 conditions per place. [2023-08-30 20:01:01,940 INFO L137 encePairwiseOnDemand]: 143/148 looper letters, 148 selfloop transitions, 68 changer transitions 0/216 dead transitions. [2023-08-30 20:01:01,940 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 216 transitions, 2256 flow [2023-08-30 20:01:01,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 20:01:01,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 20:01:01,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 500 transitions. [2023-08-30 20:01:01,942 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4826254826254826 [2023-08-30 20:01:01,942 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 500 transitions. [2023-08-30 20:01:01,942 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 500 transitions. [2023-08-30 20:01:01,942 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:01:01,942 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 500 transitions. [2023-08-30 20:01:01,943 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 71.42857142857143) internal successors, (500), 7 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:01:01,944 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 148.0) internal successors, (1184), 8 states have internal predecessors, (1184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:01:01,945 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 148.0) internal successors, (1184), 8 states have internal predecessors, (1184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:01:01,945 INFO L175 Difference]: Start difference. First operand has 92 places, 127 transitions, 1097 flow. Second operand 7 states and 500 transitions. [2023-08-30 20:01:01,945 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 216 transitions, 2256 flow [2023-08-30 20:01:01,966 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 216 transitions, 1915 flow, removed 156 selfloop flow, removed 11 redundant places. [2023-08-30 20:01:01,981 INFO L231 Difference]: Finished difference. Result has 88 places, 164 transitions, 1486 flow [2023-08-30 20:01:01,982 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=148, PETRI_DIFFERENCE_MINUEND_FLOW=880, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1486, PETRI_PLACES=88, PETRI_TRANSITIONS=164} [2023-08-30 20:01:01,982 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 66 predicate places. [2023-08-30 20:01:01,982 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 164 transitions, 1486 flow [2023-08-30 20:01:01,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 66.2) internal successors, (331), 5 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:01:01,983 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:01:01,983 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:01:01,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-30 20:01:01,983 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:01:01,984 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:01:01,984 INFO L85 PathProgramCache]: Analyzing trace with hash 624053438, now seen corresponding path program 3 times [2023-08-30 20:01:01,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:01:01,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500595252] [2023-08-30 20:01:01,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:01:01,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:01:01,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:01:02,117 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:01:02,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:01:02,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500595252] [2023-08-30 20:01:02,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500595252] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 20:01:02,118 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 20:01:02,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 20:01:02,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296403633] [2023-08-30 20:01:02,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 20:01:02,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 20:01:02,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:01:02,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 20:01:02,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 20:01:02,141 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 148 [2023-08-30 20:01:02,141 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 164 transitions, 1486 flow. Second operand has 5 states, 5 states have (on average 66.2) internal successors, (331), 5 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:01:02,141 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:01:02,141 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 148 [2023-08-30 20:01:02,141 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:01:02,311 INFO L130 PetriNetUnfolder]: 497/872 cut-off events. [2023-08-30 20:01:02,311 INFO L131 PetriNetUnfolder]: For 5287/5287 co-relation queries the response was YES. [2023-08-30 20:01:02,313 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4234 conditions, 872 events. 497/872 cut-off events. For 5287/5287 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 3930 event pairs, 127 based on Foata normal form. 8/874 useless extension candidates. Maximal degree in co-relation 3701. Up to 501 conditions per place. [2023-08-30 20:01:02,316 INFO L137 encePairwiseOnDemand]: 143/148 looper letters, 142 selfloop transitions, 53 changer transitions 0/195 dead transitions. [2023-08-30 20:01:02,316 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 195 transitions, 2070 flow [2023-08-30 20:01:02,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 20:01:02,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 20:01:02,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 356 transitions. [2023-08-30 20:01:02,318 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4810810810810811 [2023-08-30 20:01:02,318 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 356 transitions. [2023-08-30 20:01:02,318 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 356 transitions. [2023-08-30 20:01:02,318 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:01:02,318 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 356 transitions. [2023-08-30 20:01:02,319 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 71.2) internal successors, (356), 5 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:01:02,319 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 148.0) internal successors, (888), 6 states have internal predecessors, (888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:01:02,320 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 148.0) internal successors, (888), 6 states have internal predecessors, (888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:01:02,320 INFO L175 Difference]: Start difference. First operand has 88 places, 164 transitions, 1486 flow. Second operand 5 states and 356 transitions. [2023-08-30 20:01:02,320 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 195 transitions, 2070 flow [2023-08-30 20:01:02,366 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 195 transitions, 2030 flow, removed 20 selfloop flow, removed 0 redundant places. [2023-08-30 20:01:02,369 INFO L231 Difference]: Finished difference. Result has 94 places, 166 transitions, 1656 flow [2023-08-30 20:01:02,369 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=148, PETRI_DIFFERENCE_MINUEND_FLOW=1448, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1656, PETRI_PLACES=94, PETRI_TRANSITIONS=166} [2023-08-30 20:01:02,371 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 72 predicate places. [2023-08-30 20:01:02,371 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 166 transitions, 1656 flow [2023-08-30 20:01:02,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 66.2) internal successors, (331), 5 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:01:02,371 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:01:02,371 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:01:02,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-30 20:01:02,371 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:01:02,372 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:01:02,372 INFO L85 PathProgramCache]: Analyzing trace with hash -1966469734, now seen corresponding path program 4 times [2023-08-30 20:01:02,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:01:02,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152481628] [2023-08-30 20:01:02,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:01:02,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:01:02,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:01:02,557 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:01:02,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:01:02,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152481628] [2023-08-30 20:01:02,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152481628] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 20:01:02,558 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 20:01:02,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 20:01:02,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172122893] [2023-08-30 20:01:02,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 20:01:02,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 20:01:02,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:01:02,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 20:01:02,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-30 20:01:02,590 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 148 [2023-08-30 20:01:02,590 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 166 transitions, 1656 flow. Second operand has 5 states, 5 states have (on average 66.2) internal successors, (331), 5 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:01:02,591 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:01:02,591 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 148 [2023-08-30 20:01:02,591 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:01:02,728 INFO L130 PetriNetUnfolder]: 495/858 cut-off events. [2023-08-30 20:01:02,728 INFO L131 PetriNetUnfolder]: For 5709/5709 co-relation queries the response was YES. [2023-08-30 20:01:02,730 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4317 conditions, 858 events. 495/858 cut-off events. For 5709/5709 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 3793 event pairs, 76 based on Foata normal form. 4/856 useless extension candidates. Maximal degree in co-relation 3851. Up to 343 conditions per place. [2023-08-30 20:01:02,733 INFO L137 encePairwiseOnDemand]: 143/148 looper letters, 135 selfloop transitions, 67 changer transitions 0/202 dead transitions. [2023-08-30 20:01:02,734 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 202 transitions, 2263 flow [2023-08-30 20:01:02,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 20:01:02,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 20:01:02,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 359 transitions. [2023-08-30 20:01:02,736 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4851351351351351 [2023-08-30 20:01:02,736 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 359 transitions. [2023-08-30 20:01:02,736 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 359 transitions. [2023-08-30 20:01:02,736 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:01:02,736 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 359 transitions. [2023-08-30 20:01:02,737 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 71.8) internal successors, (359), 5 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:01:02,738 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 148.0) internal successors, (888), 6 states have internal predecessors, (888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:01:02,738 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 148.0) internal successors, (888), 6 states have internal predecessors, (888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:01:02,738 INFO L175 Difference]: Start difference. First operand has 94 places, 166 transitions, 1656 flow. Second operand 5 states and 359 transitions. [2023-08-30 20:01:02,738 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 202 transitions, 2263 flow [2023-08-30 20:01:02,756 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 202 transitions, 2235 flow, removed 13 selfloop flow, removed 1 redundant places. [2023-08-30 20:01:02,761 INFO L231 Difference]: Finished difference. Result has 96 places, 165 transitions, 1745 flow [2023-08-30 20:01:02,761 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=148, PETRI_DIFFERENCE_MINUEND_FLOW=1611, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1745, PETRI_PLACES=96, PETRI_TRANSITIONS=165} [2023-08-30 20:01:02,763 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 74 predicate places. [2023-08-30 20:01:02,763 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 165 transitions, 1745 flow [2023-08-30 20:01:02,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 66.2) internal successors, (331), 5 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:01:02,763 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:01:02,763 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:01:02,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-30 20:01:02,763 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:01:02,764 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:01:02,764 INFO L85 PathProgramCache]: Analyzing trace with hash -722109947, now seen corresponding path program 1 times [2023-08-30 20:01:02,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:01:02,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569585607] [2023-08-30 20:01:02,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:01:02,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:01:02,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:01:03,901 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:01:03,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:01:03,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569585607] [2023-08-30 20:01:03,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569585607] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:01:03,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152296690] [2023-08-30 20:01:03,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:01:03,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:01:03,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:01:03,918 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:01:03,920 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-30 20:01:03,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:01:04,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 28 conjunts are in the unsatisfiable core [2023-08-30 20:01:04,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:01:04,470 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:01:04,470 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:01:05,699 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:01:05,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1152296690] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:01:05,700 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:01:05,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 23 [2023-08-30 20:01:05,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061906074] [2023-08-30 20:01:05,700 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:01:05,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-30 20:01:05,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:01:05,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-30 20:01:05,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=480, Unknown=0, NotChecked=0, Total=600 [2023-08-30 20:01:07,826 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 148 [2023-08-30 20:01:07,827 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 165 transitions, 1745 flow. Second operand has 25 states, 25 states have (on average 57.12) internal successors, (1428), 25 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:01:07,827 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:01:07,828 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 148 [2023-08-30 20:01:07,828 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:01:25,545 INFO L130 PetriNetUnfolder]: 1243/2184 cut-off events. [2023-08-30 20:01:25,545 INFO L131 PetriNetUnfolder]: For 13949/13949 co-relation queries the response was YES. [2023-08-30 20:01:25,550 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11497 conditions, 2184 events. 1243/2184 cut-off events. For 13949/13949 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 12211 event pairs, 0 based on Foata normal form. 10/2188 useless extension candidates. Maximal degree in co-relation 10883. Up to 435 conditions per place. [2023-08-30 20:01:25,558 INFO L137 encePairwiseOnDemand]: 138/148 looper letters, 238 selfloop transitions, 311 changer transitions 92/641 dead transitions. [2023-08-30 20:01:25,558 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 641 transitions, 7327 flow [2023-08-30 20:01:25,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2023-08-30 20:01:25,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2023-08-30 20:01:25,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 3783 transitions. [2023-08-30 20:01:25,568 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40572715572715573 [2023-08-30 20:01:25,568 INFO L72 ComplementDD]: Start complementDD. Operand 63 states and 3783 transitions. [2023-08-30 20:01:25,568 INFO L73 IsDeterministic]: Start isDeterministic. Operand 63 states and 3783 transitions. [2023-08-30 20:01:25,570 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:01:25,570 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 63 states and 3783 transitions. [2023-08-30 20:01:25,579 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 64 states, 63 states have (on average 60.04761904761905) internal successors, (3783), 63 states have internal predecessors, (3783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:01:25,588 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 64 states, 64 states have (on average 148.0) internal successors, (9472), 64 states have internal predecessors, (9472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:01:25,590 INFO L81 ComplementDD]: Finished complementDD. Result has 64 states, 64 states have (on average 148.0) internal successors, (9472), 64 states have internal predecessors, (9472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:01:25,590 INFO L175 Difference]: Start difference. First operand has 96 places, 165 transitions, 1745 flow. Second operand 63 states and 3783 transitions. [2023-08-30 20:01:25,590 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 641 transitions, 7327 flow [2023-08-30 20:01:25,635 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 641 transitions, 6935 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-30 20:01:25,642 INFO L231 Difference]: Finished difference. Result has 179 places, 392 transitions, 4964 flow [2023-08-30 20:01:25,643 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=148, PETRI_DIFFERENCE_MINUEND_FLOW=1611, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=63, PETRI_FLOW=4964, PETRI_PLACES=179, PETRI_TRANSITIONS=392} [2023-08-30 20:01:25,643 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 157 predicate places. [2023-08-30 20:01:25,644 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 392 transitions, 4964 flow [2023-08-30 20:01:25,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 57.12) internal successors, (1428), 25 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:01:25,644 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:01:25,644 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:01:25,670 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-08-30 20:01:25,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:01:25,850 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:01:25,850 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:01:25,850 INFO L85 PathProgramCache]: Analyzing trace with hash -1771081357, now seen corresponding path program 2 times [2023-08-30 20:01:25,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:01:25,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51743450] [2023-08-30 20:01:25,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:01:25,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:01:25,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:01:26,394 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:01:26,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:01:26,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51743450] [2023-08-30 20:01:26,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51743450] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:01:26,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033821516] [2023-08-30 20:01:26,399 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 20:01:26,399 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:01:26,399 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:01:26,419 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:01:26,459 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-30 20:01:26,525 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 20:01:26,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:01:26,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 28 conjunts are in the unsatisfiable core [2023-08-30 20:01:26,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:01:26,917 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:01:26,917 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:01:28,228 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:01:28,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1033821516] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:01:28,229 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:01:28,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 23 [2023-08-30 20:01:28,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188965977] [2023-08-30 20:01:28,229 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:01:28,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-30 20:01:28,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:01:28,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-30 20:01:28,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=482, Unknown=0, NotChecked=0, Total=600 [2023-08-30 20:01:28,846 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 148 [2023-08-30 20:01:28,847 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 392 transitions, 4964 flow. Second operand has 25 states, 25 states have (on average 60.16) internal successors, (1504), 25 states have internal predecessors, (1504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:01:28,848 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:01:28,848 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 148 [2023-08-30 20:01:28,848 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:01:40,893 INFO L130 PetriNetUnfolder]: 1823/3206 cut-off events. [2023-08-30 20:01:40,893 INFO L131 PetriNetUnfolder]: For 24414/24426 co-relation queries the response was YES. [2023-08-30 20:01:40,903 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18913 conditions, 3206 events. 1823/3206 cut-off events. For 24414/24426 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 19375 event pairs, 14 based on Foata normal form. 25/3225 useless extension candidates. Maximal degree in co-relation 18793. Up to 810 conditions per place. [2023-08-30 20:01:40,916 INFO L137 encePairwiseOnDemand]: 140/148 looper letters, 288 selfloop transitions, 456 changer transitions 113/862 dead transitions. [2023-08-30 20:01:40,917 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 862 transitions, 11492 flow [2023-08-30 20:01:40,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2023-08-30 20:01:40,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2023-08-30 20:01:40,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 3669 transitions. [2023-08-30 20:01:40,942 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42742311276794037 [2023-08-30 20:01:40,942 INFO L72 ComplementDD]: Start complementDD. Operand 58 states and 3669 transitions. [2023-08-30 20:01:40,942 INFO L73 IsDeterministic]: Start isDeterministic. Operand 58 states and 3669 transitions. [2023-08-30 20:01:40,943 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:01:40,943 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 58 states and 3669 transitions. [2023-08-30 20:01:40,947 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 59 states, 58 states have (on average 63.258620689655174) internal successors, (3669), 58 states have internal predecessors, (3669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:01:40,955 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 59 states, 59 states have (on average 148.0) internal successors, (8732), 59 states have internal predecessors, (8732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:01:40,956 INFO L81 ComplementDD]: Finished complementDD. Result has 59 states, 59 states have (on average 148.0) internal successors, (8732), 59 states have internal predecessors, (8732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:01:40,956 INFO L175 Difference]: Start difference. First operand has 179 places, 392 transitions, 4964 flow. Second operand 58 states and 3669 transitions. [2023-08-30 20:01:40,956 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 862 transitions, 11492 flow [2023-08-30 20:01:41,072 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 862 transitions, 11262 flow, removed 107 selfloop flow, removed 12 redundant places. [2023-08-30 20:01:41,081 INFO L231 Difference]: Finished difference. Result has 242 places, 607 transitions, 9382 flow [2023-08-30 20:01:41,082 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=148, PETRI_DIFFERENCE_MINUEND_FLOW=4814, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=392, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=273, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=58, PETRI_FLOW=9382, PETRI_PLACES=242, PETRI_TRANSITIONS=607} [2023-08-30 20:01:41,083 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 220 predicate places. [2023-08-30 20:01:41,083 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 607 transitions, 9382 flow [2023-08-30 20:01:41,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 60.16) internal successors, (1504), 25 states have internal predecessors, (1504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:01:41,084 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:01:41,084 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:01:41,090 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-08-30 20:01:41,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:01:41,291 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:01:41,291 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:01:41,291 INFO L85 PathProgramCache]: Analyzing trace with hash -567010117, now seen corresponding path program 3 times [2023-08-30 20:01:41,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:01:41,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337228092] [2023-08-30 20:01:41,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:01:41,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:01:41,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:01:41,482 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:01:41,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:01:41,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337228092] [2023-08-30 20:01:41,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337228092] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:01:41,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95460301] [2023-08-30 20:01:41,483 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 20:01:41,483 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:01:41,483 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:01:41,497 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:01:41,509 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-30 20:01:41,600 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-30 20:01:41,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:01:41,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-30 20:01:41,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:01:41,730 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:01:41,730 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:01:41,800 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:01:41,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [95460301] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:01:41,800 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:01:41,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 5] total 10 [2023-08-30 20:01:41,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541085872] [2023-08-30 20:01:41,801 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:01:41,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-30 20:01:41,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:01:41,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-30 20:01:41,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2023-08-30 20:01:41,845 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 148 [2023-08-30 20:01:41,846 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 607 transitions, 9382 flow. Second operand has 10 states, 10 states have (on average 66.2) internal successors, (662), 10 states have internal predecessors, (662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:01:41,846 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:01:41,846 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 148 [2023-08-30 20:01:41,846 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:01:42,739 INFO L130 PetriNetUnfolder]: 2335/3999 cut-off events. [2023-08-30 20:01:42,739 INFO L131 PetriNetUnfolder]: For 41230/41250 co-relation queries the response was YES. [2023-08-30 20:01:42,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26745 conditions, 3999 events. 2335/3999 cut-off events. For 41230/41250 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 24611 event pairs, 46 based on Foata normal form. 54/4045 useless extension candidates. Maximal degree in co-relation 26585. Up to 838 conditions per place. [2023-08-30 20:01:42,773 INFO L137 encePairwiseOnDemand]: 142/148 looper letters, 324 selfloop transitions, 632 changer transitions 0/961 dead transitions. [2023-08-30 20:01:42,773 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 961 transitions, 16283 flow [2023-08-30 20:01:42,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-30 20:01:42,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-30 20:01:42,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 909 transitions. [2023-08-30 20:01:42,775 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47245322245322247 [2023-08-30 20:01:42,775 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 909 transitions. [2023-08-30 20:01:42,775 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 909 transitions. [2023-08-30 20:01:42,775 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:01:42,775 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 909 transitions. [2023-08-30 20:01:42,776 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 69.92307692307692) internal successors, (909), 13 states have internal predecessors, (909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:01:42,778 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 148.0) internal successors, (2072), 14 states have internal predecessors, (2072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:01:42,778 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 148.0) internal successors, (2072), 14 states have internal predecessors, (2072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:01:42,778 INFO L175 Difference]: Start difference. First operand has 242 places, 607 transitions, 9382 flow. Second operand 13 states and 909 transitions. [2023-08-30 20:01:42,778 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 961 transitions, 16283 flow [2023-08-30 20:01:43,161 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 961 transitions, 15862 flow, removed 179 selfloop flow, removed 26 redundant places. [2023-08-30 20:01:43,173 INFO L231 Difference]: Finished difference. Result has 222 places, 837 transitions, 14953 flow [2023-08-30 20:01:43,173 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=148, PETRI_DIFFERENCE_MINUEND_FLOW=9107, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=607, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=418, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=14953, PETRI_PLACES=222, PETRI_TRANSITIONS=837} [2023-08-30 20:01:43,173 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 200 predicate places. [2023-08-30 20:01:43,174 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 837 transitions, 14953 flow [2023-08-30 20:01:43,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 66.2) internal successors, (662), 10 states have internal predecessors, (662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:01:43,174 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:01:43,174 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:01:43,179 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-08-30 20:01:43,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:01:43,382 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:01:43,383 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:01:43,383 INFO L85 PathProgramCache]: Analyzing trace with hash -319686935, now seen corresponding path program 4 times [2023-08-30 20:01:43,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:01:43,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762860135] [2023-08-30 20:01:43,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:01:43,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:01:43,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:01:44,340 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:01:44,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:01:44,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762860135] [2023-08-30 20:01:44,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762860135] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:01:44,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933322616] [2023-08-30 20:01:44,340 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 20:01:44,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:01:44,341 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:01:44,341 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:01:44,343 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-30 20:01:44,443 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 20:01:44,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:01:44,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 28 conjunts are in the unsatisfiable core [2023-08-30 20:01:44,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:01:45,288 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:01:45,288 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:01:46,211 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:01:46,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [933322616] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:01:46,212 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:01:46,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 25 [2023-08-30 20:01:46,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897918090] [2023-08-30 20:01:46,212 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:01:46,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-30 20:01:46,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:01:46,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-30 20:01:46,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=587, Unknown=0, NotChecked=0, Total=702 [2023-08-30 20:01:47,082 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 148 [2023-08-30 20:01:47,083 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 837 transitions, 14953 flow. Second operand has 27 states, 27 states have (on average 56.111111111111114) internal successors, (1515), 27 states have internal predecessors, (1515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:01:47,083 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:01:47,083 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 148 [2023-08-30 20:01:47,083 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:02:08,432 INFO L130 PetriNetUnfolder]: 3077/5345 cut-off events. [2023-08-30 20:02:08,433 INFO L131 PetriNetUnfolder]: For 67505/67505 co-relation queries the response was YES. [2023-08-30 20:02:08,452 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39243 conditions, 5345 events. 3077/5345 cut-off events. For 67505/67505 co-relation queries the response was YES. Maximal size of possible extension queue 338. Compared 35370 event pairs, 18 based on Foata normal form. 15/5350 useless extension candidates. Maximal degree in co-relation 38193. Up to 1977 conditions per place. [2023-08-30 20:02:08,470 INFO L137 encePairwiseOnDemand]: 138/148 looper letters, 462 selfloop transitions, 731 changer transitions 106/1299 dead transitions. [2023-08-30 20:02:08,471 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 1299 transitions, 23674 flow [2023-08-30 20:02:08,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2023-08-30 20:02:08,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2023-08-30 20:02:08,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 3935 transitions. [2023-08-30 20:02:08,475 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39683340056474387 [2023-08-30 20:02:08,475 INFO L72 ComplementDD]: Start complementDD. Operand 67 states and 3935 transitions. [2023-08-30 20:02:08,475 INFO L73 IsDeterministic]: Start isDeterministic. Operand 67 states and 3935 transitions. [2023-08-30 20:02:08,476 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:02:08,476 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 67 states and 3935 transitions. [2023-08-30 20:02:08,480 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 68 states, 67 states have (on average 58.73134328358209) internal successors, (3935), 67 states have internal predecessors, (3935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:02:08,486 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 68 states, 68 states have (on average 148.0) internal successors, (10064), 68 states have internal predecessors, (10064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:02:08,488 INFO L81 ComplementDD]: Finished complementDD. Result has 68 states, 68 states have (on average 148.0) internal successors, (10064), 68 states have internal predecessors, (10064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:02:08,488 INFO L175 Difference]: Start difference. First operand has 222 places, 837 transitions, 14953 flow. Second operand 67 states and 3935 transitions. [2023-08-30 20:02:08,488 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 1299 transitions, 23674 flow [2023-08-30 20:02:09,032 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 1299 transitions, 22880 flow, removed 24 selfloop flow, removed 4 redundant places. [2023-08-30 20:02:09,049 INFO L231 Difference]: Finished difference. Result has 312 places, 1042 transitions, 21007 flow [2023-08-30 20:02:09,049 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=148, PETRI_DIFFERENCE_MINUEND_FLOW=14361, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=837, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=546, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=67, PETRI_FLOW=21007, PETRI_PLACES=312, PETRI_TRANSITIONS=1042} [2023-08-30 20:02:09,050 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 290 predicate places. [2023-08-30 20:02:09,050 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 1042 transitions, 21007 flow [2023-08-30 20:02:09,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 56.111111111111114) internal successors, (1515), 27 states have internal predecessors, (1515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:02:09,050 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:02:09,051 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:02:09,056 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-30 20:02:09,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:02:09,256 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:02:09,256 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:02:09,256 INFO L85 PathProgramCache]: Analyzing trace with hash -1054529367, now seen corresponding path program 5 times [2023-08-30 20:02:09,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:02:09,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079105383] [2023-08-30 20:02:09,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:02:09,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:02:09,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:02:10,327 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:02:10,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:02:10,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079105383] [2023-08-30 20:02:10,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079105383] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:02:10,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437578568] [2023-08-30 20:02:10,328 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 20:02:10,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:02:10,328 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:02:10,341 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:02:10,342 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-30 20:02:10,454 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-30 20:02:10,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:02:10,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 28 conjunts are in the unsatisfiable core [2023-08-30 20:02:10,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:02:11,185 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:02:11,185 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:02:12,823 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:02:12,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [437578568] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:02:12,823 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:02:12,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 24 [2023-08-30 20:02:12,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510079133] [2023-08-30 20:02:12,824 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:02:12,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-30 20:02:12,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:02:12,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-30 20:02:12,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=530, Unknown=0, NotChecked=0, Total=650 [2023-08-30 20:02:13,465 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 148 [2023-08-30 20:02:13,466 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 1042 transitions, 21007 flow. Second operand has 26 states, 26 states have (on average 57.19230769230769) internal successors, (1487), 26 states have internal predecessors, (1487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:02:13,466 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:02:13,466 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 148 [2023-08-30 20:02:13,467 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:02:47,586 INFO L130 PetriNetUnfolder]: 3815/6634 cut-off events. [2023-08-30 20:02:47,587 INFO L131 PetriNetUnfolder]: For 107482/107482 co-relation queries the response was YES. [2023-08-30 20:02:47,620 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52929 conditions, 6634 events. 3815/6634 cut-off events. For 107482/107482 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 46047 event pairs, 14 based on Foata normal form. 18/6642 useless extension candidates. Maximal degree in co-relation 52752. Up to 2374 conditions per place. [2023-08-30 20:02:47,647 INFO L137 encePairwiseOnDemand]: 138/148 looper letters, 495 selfloop transitions, 1029 changer transitions 137/1661 dead transitions. [2023-08-30 20:02:47,647 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 377 places, 1661 transitions, 33858 flow [2023-08-30 20:02:47,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2023-08-30 20:02:47,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2023-08-30 20:02:47,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 4708 transitions. [2023-08-30 20:02:47,652 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4026684912760862 [2023-08-30 20:02:47,652 INFO L72 ComplementDD]: Start complementDD. Operand 79 states and 4708 transitions. [2023-08-30 20:02:47,652 INFO L73 IsDeterministic]: Start isDeterministic. Operand 79 states and 4708 transitions. [2023-08-30 20:02:47,653 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:02:47,653 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 79 states and 4708 transitions. [2023-08-30 20:02:47,658 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 80 states, 79 states have (on average 59.59493670886076) internal successors, (4708), 79 states have internal predecessors, (4708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:02:47,664 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 80 states, 80 states have (on average 148.0) internal successors, (11840), 80 states have internal predecessors, (11840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:02:47,665 INFO L81 ComplementDD]: Finished complementDD. Result has 80 states, 80 states have (on average 148.0) internal successors, (11840), 80 states have internal predecessors, (11840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:02:47,665 INFO L175 Difference]: Start difference. First operand has 312 places, 1042 transitions, 21007 flow. Second operand 79 states and 4708 transitions. [2023-08-30 20:02:47,666 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 377 places, 1661 transitions, 33858 flow [2023-08-30 20:02:48,646 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 352 places, 1661 transitions, 32422 flow, removed 297 selfloop flow, removed 25 redundant places. [2023-08-30 20:02:48,668 INFO L231 Difference]: Finished difference. Result has 385 places, 1353 transitions, 30461 flow [2023-08-30 20:02:48,669 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=148, PETRI_DIFFERENCE_MINUEND_FLOW=20081, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1042, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=737, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=79, PETRI_FLOW=30461, PETRI_PLACES=385, PETRI_TRANSITIONS=1353} [2023-08-30 20:02:48,669 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 363 predicate places. [2023-08-30 20:02:48,669 INFO L495 AbstractCegarLoop]: Abstraction has has 385 places, 1353 transitions, 30461 flow [2023-08-30 20:02:48,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 57.19230769230769) internal successors, (1487), 26 states have internal predecessors, (1487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:02:48,670 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:02:48,670 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:02:48,674 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-08-30 20:02:48,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:02:48,874 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:02:48,874 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:02:48,874 INFO L85 PathProgramCache]: Analyzing trace with hash -1208967995, now seen corresponding path program 6 times [2023-08-30 20:02:48,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:02:48,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963990382] [2023-08-30 20:02:48,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:02:48,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:02:48,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:02:49,739 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:02:49,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:02:49,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963990382] [2023-08-30 20:02:49,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963990382] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:02:49,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442960719] [2023-08-30 20:02:49,740 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 20:02:49,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:02:49,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:02:49,741 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) [2023-08-30 20:02:49,748 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-30 20:02:49,867 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-30 20:02:49,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:02:49,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2023-08-30 20:02:49,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:02:50,606 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:02:50,606 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:02:51,642 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:02:51,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [442960719] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:02:51,643 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:02:51,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 29 [2023-08-30 20:02:51,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275141988] [2023-08-30 20:02:51,643 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:02:51,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-08-30 20:02:51,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:02:51,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-08-30 20:02:51,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=746, Unknown=0, NotChecked=0, Total=930 [2023-08-30 20:02:52,126 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 148 [2023-08-30 20:02:52,127 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 385 places, 1353 transitions, 30461 flow. Second operand has 31 states, 31 states have (on average 55.83870967741935) internal successors, (1731), 31 states have internal predecessors, (1731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:02:52,127 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:02:52,127 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 148 [2023-08-30 20:02:52,127 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:03:03,433 INFO L130 PetriNetUnfolder]: 3977/6905 cut-off events. [2023-08-30 20:03:03,433 INFO L131 PetriNetUnfolder]: For 138288/138288 co-relation queries the response was YES. [2023-08-30 20:03:03,475 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61621 conditions, 6905 events. 3977/6905 cut-off events. For 138288/138288 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 48099 event pairs, 6 based on Foata normal form. 13/6912 useless extension candidates. Maximal degree in co-relation 61371. Up to 2427 conditions per place. [2023-08-30 20:03:03,541 INFO L137 encePairwiseOnDemand]: 138/148 looper letters, 303 selfloop transitions, 1399 changer transitions 89/1791 dead transitions. [2023-08-30 20:03:03,541 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 425 places, 1791 transitions, 41197 flow [2023-08-30 20:03:03,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2023-08-30 20:03:03,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2023-08-30 20:03:03,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 3399 transitions. [2023-08-30 20:03:03,545 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3959692451071761 [2023-08-30 20:03:03,545 INFO L72 ComplementDD]: Start complementDD. Operand 58 states and 3399 transitions. [2023-08-30 20:03:03,545 INFO L73 IsDeterministic]: Start isDeterministic. Operand 58 states and 3399 transitions. [2023-08-30 20:03:03,546 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:03:03,546 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 58 states and 3399 transitions. [2023-08-30 20:03:03,550 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 59 states, 58 states have (on average 58.60344827586207) internal successors, (3399), 58 states have internal predecessors, (3399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:03:03,560 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 59 states, 59 states have (on average 148.0) internal successors, (8732), 59 states have internal predecessors, (8732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:03:03,561 INFO L81 ComplementDD]: Finished complementDD. Result has 59 states, 59 states have (on average 148.0) internal successors, (8732), 59 states have internal predecessors, (8732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:03:03,561 INFO L175 Difference]: Start difference. First operand has 385 places, 1353 transitions, 30461 flow. Second operand 58 states and 3399 transitions. [2023-08-30 20:03:03,561 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 425 places, 1791 transitions, 41197 flow [2023-08-30 20:03:05,148 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 408 places, 1791 transitions, 40649 flow, removed 233 selfloop flow, removed 17 redundant places. [2023-08-30 20:03:05,185 INFO L231 Difference]: Finished difference. Result has 420 places, 1598 transitions, 40780 flow [2023-08-30 20:03:05,186 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=148, PETRI_DIFFERENCE_MINUEND_FLOW=30093, PETRI_DIFFERENCE_MINUEND_PLACES=351, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1353, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1160, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=58, PETRI_FLOW=40780, PETRI_PLACES=420, PETRI_TRANSITIONS=1598} [2023-08-30 20:03:05,186 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 398 predicate places. [2023-08-30 20:03:05,186 INFO L495 AbstractCegarLoop]: Abstraction has has 420 places, 1598 transitions, 40780 flow [2023-08-30 20:03:05,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 55.83870967741935) internal successors, (1731), 31 states have internal predecessors, (1731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:03:05,187 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:03:05,187 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:03:05,193 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-30 20:03:05,391 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,SelfDestructingSolverStorable11 [2023-08-30 20:03:05,391 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:03:05,391 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:03:05,392 INFO L85 PathProgramCache]: Analyzing trace with hash -1594707129, now seen corresponding path program 7 times [2023-08-30 20:03:05,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:03:05,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727731778] [2023-08-30 20:03:05,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:03:05,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:03:05,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:03:06,141 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:03:06,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:03:06,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727731778] [2023-08-30 20:03:06,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727731778] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:03:06,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642854626] [2023-08-30 20:03:06,142 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 20:03:06,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:03:06,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:03:06,143 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) [2023-08-30 20:03:06,145 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-30 20:03:06,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:03:06,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 34 conjunts are in the unsatisfiable core [2023-08-30 20:03:06,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:03:06,831 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:03:06,831 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:03:08,148 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:03:08,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [642854626] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:03:08,148 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:03:08,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 28 [2023-08-30 20:03:08,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523363213] [2023-08-30 20:03:08,149 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:03:08,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-30 20:03:08,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:03:08,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-30 20:03:08,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=692, Unknown=0, NotChecked=0, Total=870 [2023-08-30 20:03:08,793 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 148 [2023-08-30 20:03:08,794 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 420 places, 1598 transitions, 40780 flow. Second operand has 30 states, 30 states have (on average 55.766666666666666) internal successors, (1673), 30 states have internal predecessors, (1673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:03:08,794 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:03:08,794 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 148 [2023-08-30 20:03:08,794 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:03:36,043 INFO L130 PetriNetUnfolder]: 4695/8116 cut-off events. [2023-08-30 20:03:36,043 INFO L131 PetriNetUnfolder]: For 198578/198578 co-relation queries the response was YES. [2023-08-30 20:03:36,097 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80276 conditions, 8116 events. 4695/8116 cut-off events. For 198578/198578 co-relation queries the response was YES. Maximal size of possible extension queue 530. Compared 57740 event pairs, 10 based on Foata normal form. 12/8128 useless extension candidates. Maximal degree in co-relation 79988. Up to 1927 conditions per place. [2023-08-30 20:03:36,135 INFO L137 encePairwiseOnDemand]: 137/148 looper letters, 253 selfloop transitions, 1867 changer transitions 84/2204 dead transitions. [2023-08-30 20:03:36,136 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 497 places, 2204 transitions, 56492 flow [2023-08-30 20:03:36,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2023-08-30 20:03:36,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2023-08-30 20:03:36,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 5150 transitions. [2023-08-30 20:03:36,155 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39542383292383293 [2023-08-30 20:03:36,156 INFO L72 ComplementDD]: Start complementDD. Operand 88 states and 5150 transitions. [2023-08-30 20:03:36,156 INFO L73 IsDeterministic]: Start isDeterministic. Operand 88 states and 5150 transitions. [2023-08-30 20:03:36,157 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:03:36,157 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 88 states and 5150 transitions. [2023-08-30 20:03:36,161 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 89 states, 88 states have (on average 58.52272727272727) internal successors, (5150), 88 states have internal predecessors, (5150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:03:36,167 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 89 states, 89 states have (on average 148.0) internal successors, (13172), 89 states have internal predecessors, (13172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:03:36,168 INFO L81 ComplementDD]: Finished complementDD. Result has 89 states, 89 states have (on average 148.0) internal successors, (13172), 89 states have internal predecessors, (13172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:03:36,169 INFO L175 Difference]: Start difference. First operand has 420 places, 1598 transitions, 40780 flow. Second operand 88 states and 5150 transitions. [2023-08-30 20:03:36,169 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 497 places, 2204 transitions, 56492 flow [2023-08-30 20:03:38,731 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 477 places, 2204 transitions, 55321 flow, removed 220 selfloop flow, removed 20 redundant places. [2023-08-30 20:03:38,767 INFO L231 Difference]: Finished difference. Result has 492 places, 1960 transitions, 53409 flow [2023-08-30 20:03:38,768 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=148, PETRI_DIFFERENCE_MINUEND_FLOW=40030, PETRI_DIFFERENCE_MINUEND_PLACES=390, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1598, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1506, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=88, PETRI_FLOW=53409, PETRI_PLACES=492, PETRI_TRANSITIONS=1960} [2023-08-30 20:03:38,769 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 470 predicate places. [2023-08-30 20:03:38,769 INFO L495 AbstractCegarLoop]: Abstraction has has 492 places, 1960 transitions, 53409 flow [2023-08-30 20:03:38,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 55.766666666666666) internal successors, (1673), 30 states have internal predecessors, (1673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:03:38,769 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:03:38,769 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:03:38,776 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-30 20:03:38,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-08-30 20:03:38,974 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:03:38,974 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:03:38,974 INFO L85 PathProgramCache]: Analyzing trace with hash 808345547, now seen corresponding path program 5 times [2023-08-30 20:03:38,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:03:38,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016580093] [2023-08-30 20:03:38,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:03:38,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:03:39,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:03:39,400 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:03:39,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:03:39,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016580093] [2023-08-30 20:03:39,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016580093] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:03:39,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639349253] [2023-08-30 20:03:39,400 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 20:03:39,400 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:03:39,401 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:03:39,409 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) [2023-08-30 20:03:39,412 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-30 20:03:39,507 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-08-30 20:03:39,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:03:39,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 35 conjunts are in the unsatisfiable core [2023-08-30 20:03:39,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:03:39,929 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:03:39,929 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:03:40,327 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:03:40,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [639349253] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:03:40,328 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:03:40,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 28 [2023-08-30 20:03:40,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97956941] [2023-08-30 20:03:40,328 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:03:40,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-30 20:03:40,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:03:40,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-30 20:03:40,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=686, Unknown=0, NotChecked=0, Total=870 [2023-08-30 20:03:40,666 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 148 [2023-08-30 20:03:40,667 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 492 places, 1960 transitions, 53409 flow. Second operand has 30 states, 30 states have (on average 55.7) internal successors, (1671), 30 states have internal predecessors, (1671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:03:40,667 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:03:40,667 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 148 [2023-08-30 20:03:40,667 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:03:51,226 INFO L130 PetriNetUnfolder]: 5939/10335 cut-off events. [2023-08-30 20:03:51,226 INFO L131 PetriNetUnfolder]: For 263601/263601 co-relation queries the response was YES. [2023-08-30 20:03:51,292 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107697 conditions, 10335 events. 5939/10335 cut-off events. For 263601/263601 co-relation queries the response was YES. Maximal size of possible extension queue 685. Compared 77095 event pairs, 60 based on Foata normal form. 19/10354 useless extension candidates. Maximal degree in co-relation 107331. Up to 2374 conditions per place. [2023-08-30 20:03:51,340 INFO L137 encePairwiseOnDemand]: 137/148 looper letters, 377 selfloop transitions, 2315 changer transitions 114/2806 dead transitions. [2023-08-30 20:03:51,340 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 557 places, 2806 transitions, 78091 flow [2023-08-30 20:03:51,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2023-08-30 20:03:51,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2023-08-30 20:03:51,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 4450 transitions. [2023-08-30 20:03:51,372 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3956258890469417 [2023-08-30 20:03:51,372 INFO L72 ComplementDD]: Start complementDD. Operand 76 states and 4450 transitions. [2023-08-30 20:03:51,372 INFO L73 IsDeterministic]: Start isDeterministic. Operand 76 states and 4450 transitions. [2023-08-30 20:03:51,373 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:03:51,373 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 76 states and 4450 transitions. [2023-08-30 20:03:51,378 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 77 states, 76 states have (on average 58.55263157894737) internal successors, (4450), 76 states have internal predecessors, (4450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:03:51,386 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 77 states, 77 states have (on average 148.0) internal successors, (11396), 77 states have internal predecessors, (11396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:03:51,387 INFO L81 ComplementDD]: Finished complementDD. Result has 77 states, 77 states have (on average 148.0) internal successors, (11396), 77 states have internal predecessors, (11396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:03:51,387 INFO L175 Difference]: Start difference. First operand has 492 places, 1960 transitions, 53409 flow. Second operand 76 states and 4450 transitions. [2023-08-30 20:03:51,387 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 557 places, 2806 transitions, 78091 flow [2023-08-30 20:03:55,481 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 531 places, 2806 transitions, 76525 flow, removed 506 selfloop flow, removed 26 redundant places. [2023-08-30 20:03:55,534 INFO L231 Difference]: Finished difference. Result has 561 places, 2561 transitions, 75141 flow [2023-08-30 20:03:55,535 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=148, PETRI_DIFFERENCE_MINUEND_FLOW=52402, PETRI_DIFFERENCE_MINUEND_PLACES=456, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1960, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1729, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=76, PETRI_FLOW=75141, PETRI_PLACES=561, PETRI_TRANSITIONS=2561} [2023-08-30 20:03:55,536 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 539 predicate places. [2023-08-30 20:03:55,536 INFO L495 AbstractCegarLoop]: Abstraction has has 561 places, 2561 transitions, 75141 flow [2023-08-30 20:03:55,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 55.7) internal successors, (1671), 30 states have internal predecessors, (1671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:03:55,536 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:03:55,537 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:03:55,541 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-30 20:03:55,740 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,SelfDestructingSolverStorable13 [2023-08-30 20:03:55,741 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:03:55,741 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:03:55,741 INFO L85 PathProgramCache]: Analyzing trace with hash 488184972, now seen corresponding path program 8 times [2023-08-30 20:03:55,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:03:55,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103912198] [2023-08-30 20:03:55,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:03:55,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:03:55,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:03:57,056 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:03:57,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:03:57,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103912198] [2023-08-30 20:03:57,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103912198] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:03:57,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [912919771] [2023-08-30 20:03:57,057 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 20:03:57,057 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:03:57,058 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:03:57,058 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) [2023-08-30 20:03:57,060 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-30 20:03:57,173 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 20:03:57,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:03:57,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-30 20:03:57,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:03:57,921 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:03:57,921 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:04:05,126 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:04:05,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [912919771] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:04:05,126 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:04:05,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 27 [2023-08-30 20:04:05,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926556786] [2023-08-30 20:04:05,127 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:04:05,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-30 20:04:05,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:04:05,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-30 20:04:05,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=666, Unknown=0, NotChecked=0, Total=812 [2023-08-30 20:04:05,920 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 148 [2023-08-30 20:04:05,921 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 561 places, 2561 transitions, 75141 flow. Second operand has 29 states, 29 states have (on average 56.172413793103445) internal successors, (1629), 29 states have internal predecessors, (1629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:04:05,921 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:04:05,921 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 148 [2023-08-30 20:04:05,921 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:05:22,152 INFO L130 PetriNetUnfolder]: 7075/12358 cut-off events. [2023-08-30 20:05:22,153 INFO L131 PetriNetUnfolder]: For 362735/362735 co-relation queries the response was YES. [2023-08-30 20:05:22,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 141291 conditions, 12358 events. 7075/12358 cut-off events. For 362735/362735 co-relation queries the response was YES. Maximal size of possible extension queue 778. Compared 93744 event pairs, 4 based on Foata normal form. 32/12390 useless extension candidates. Maximal degree in co-relation 140971. Up to 4571 conditions per place. [2023-08-30 20:05:22,407 INFO L137 encePairwiseOnDemand]: 138/148 looper letters, 1216 selfloop transitions, 2060 changer transitions 223/3499 dead transitions. [2023-08-30 20:05:22,407 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 646 places, 3499 transitions, 103507 flow [2023-08-30 20:05:22,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2023-08-30 20:05:22,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2023-08-30 20:05:22,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 5463 transitions. [2023-08-30 20:05:22,413 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39690496948561466 [2023-08-30 20:05:22,414 INFO L72 ComplementDD]: Start complementDD. Operand 93 states and 5463 transitions. [2023-08-30 20:05:22,414 INFO L73 IsDeterministic]: Start isDeterministic. Operand 93 states and 5463 transitions. [2023-08-30 20:05:22,415 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:05:22,415 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 93 states and 5463 transitions. [2023-08-30 20:05:22,419 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 94 states, 93 states have (on average 58.74193548387097) internal successors, (5463), 93 states have internal predecessors, (5463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:05:22,425 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 94 states, 94 states have (on average 148.0) internal successors, (13912), 94 states have internal predecessors, (13912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:05:22,426 INFO L81 ComplementDD]: Finished complementDD. Result has 94 states, 94 states have (on average 148.0) internal successors, (13912), 94 states have internal predecessors, (13912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:05:22,427 INFO L175 Difference]: Start difference. First operand has 561 places, 2561 transitions, 75141 flow. Second operand 93 states and 5463 transitions. [2023-08-30 20:05:22,427 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 646 places, 3499 transitions, 103507 flow [2023-08-30 20:05:29,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 621 places, 3499 transitions, 100084 flow, removed 569 selfloop flow, removed 25 redundant places. [2023-08-30 20:05:29,713 INFO L231 Difference]: Finished difference. Result has 667 places, 3022 transitions, 95128 flow [2023-08-30 20:05:29,715 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=148, PETRI_DIFFERENCE_MINUEND_FLOW=72702, PETRI_DIFFERENCE_MINUEND_PLACES=529, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2561, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1674, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=781, PETRI_DIFFERENCE_SUBTRAHEND_STATES=93, PETRI_FLOW=95128, PETRI_PLACES=667, PETRI_TRANSITIONS=3022} [2023-08-30 20:05:29,716 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 645 predicate places. [2023-08-30 20:05:29,716 INFO L495 AbstractCegarLoop]: Abstraction has has 667 places, 3022 transitions, 95128 flow [2023-08-30 20:05:29,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 56.172413793103445) internal successors, (1629), 29 states have internal predecessors, (1629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:05:29,716 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:05:29,716 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:05:29,723 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-30 20:05:29,920 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,SelfDestructingSolverStorable14 [2023-08-30 20:05:29,921 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:05:29,921 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:05:29,921 INFO L85 PathProgramCache]: Analyzing trace with hash -1527671576, now seen corresponding path program 9 times [2023-08-30 20:05:29,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:05:29,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142623454] [2023-08-30 20:05:29,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:05:29,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:05:29,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:05:30,550 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:05:30,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:05:30,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142623454] [2023-08-30 20:05:30,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142623454] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:05:30,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625982985] [2023-08-30 20:05:30,551 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 20:05:30,551 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:05:30,551 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:05:30,566 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) [2023-08-30 20:05:30,567 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-30 20:05:30,681 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-08-30 20:05:30,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:05:30,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 35 conjunts are in the unsatisfiable core [2023-08-30 20:05:30,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:05:31,374 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:05:31,374 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:05:32,637 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:05:32,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1625982985] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:05:32,637 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:05:32,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 29 [2023-08-30 20:05:32,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194651065] [2023-08-30 20:05:32,638 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:05:32,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-08-30 20:05:32,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:05:32,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-08-30 20:05:32,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=774, Unknown=0, NotChecked=0, Total=930 [2023-08-30 20:05:33,710 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 148 [2023-08-30 20:05:33,711 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 667 places, 3022 transitions, 95128 flow. Second operand has 31 states, 31 states have (on average 55.903225806451616) internal successors, (1733), 31 states have internal predecessors, (1733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:05:33,711 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:05:33,711 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 148 [2023-08-30 20:05:33,711 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:06:51,038 INFO L130 PetriNetUnfolder]: 9243/16108 cut-off events. [2023-08-30 20:06:51,038 INFO L131 PetriNetUnfolder]: For 564279/564279 co-relation queries the response was YES. [2023-08-30 20:06:51,223 INFO L83 FinitePrefix]: Finished finitePrefix Result has 193270 conditions, 16108 events. 9243/16108 cut-off events. For 564279/564279 co-relation queries the response was YES. Maximal size of possible extension queue 992. Compared 127984 event pairs, 4 based on Foata normal form. 32/16140 useless extension candidates. Maximal degree in co-relation 192672. Up to 3934 conditions per place. [2023-08-30 20:06:51,307 INFO L137 encePairwiseOnDemand]: 137/148 looper letters, 714 selfloop transitions, 3701 changer transitions 248/4663 dead transitions. [2023-08-30 20:06:51,308 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 791 places, 4663 transitions, 147128 flow [2023-08-30 20:06:51,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 154 states. [2023-08-30 20:06:51,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2023-08-30 20:06:51,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 9003 transitions. [2023-08-30 20:06:51,314 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39500702000702 [2023-08-30 20:06:51,314 INFO L72 ComplementDD]: Start complementDD. Operand 154 states and 9003 transitions. [2023-08-30 20:06:51,315 INFO L73 IsDeterministic]: Start isDeterministic. Operand 154 states and 9003 transitions. [2023-08-30 20:06:51,316 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:06:51,316 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 154 states and 9003 transitions. [2023-08-30 20:06:51,336 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 155 states, 154 states have (on average 58.46103896103896) internal successors, (9003), 154 states have internal predecessors, (9003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:06:51,348 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 155 states, 155 states have (on average 148.0) internal successors, (22940), 155 states have internal predecessors, (22940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:06:51,350 INFO L81 ComplementDD]: Finished complementDD. Result has 155 states, 155 states have (on average 148.0) internal successors, (22940), 155 states have internal predecessors, (22940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:06:51,351 INFO L175 Difference]: Start difference. First operand has 667 places, 3022 transitions, 95128 flow. Second operand 154 states and 9003 transitions. [2023-08-30 20:06:51,351 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 791 places, 4663 transitions, 147128 flow [2023-08-30 20:07:02,475 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 765 places, 4663 transitions, 145974 flow, removed 560 selfloop flow, removed 26 redundant places. [2023-08-30 20:07:02,566 INFO L231 Difference]: Finished difference. Result has 823 places, 4159 transitions, 141643 flow [2023-08-30 20:07:02,568 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=148, PETRI_DIFFERENCE_MINUEND_FLOW=94556, PETRI_DIFFERENCE_MINUEND_PLACES=612, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3022, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2640, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=308, PETRI_DIFFERENCE_SUBTRAHEND_STATES=154, PETRI_FLOW=141643, PETRI_PLACES=823, PETRI_TRANSITIONS=4159} [2023-08-30 20:07:02,569 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 801 predicate places. [2023-08-30 20:07:02,569 INFO L495 AbstractCegarLoop]: Abstraction has has 823 places, 4159 transitions, 141643 flow [2023-08-30 20:07:02,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 55.903225806451616) internal successors, (1733), 31 states have internal predecessors, (1733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:07:02,569 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:07:02,569 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:07:02,575 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-08-30 20:07:02,773 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,SelfDestructingSolverStorable15 [2023-08-30 20:07:02,774 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:07:02,774 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:07:02,774 INFO L85 PathProgramCache]: Analyzing trace with hash 1153779590, now seen corresponding path program 10 times [2023-08-30 20:07:02,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:07:02,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30119955] [2023-08-30 20:07:02,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:07:02,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:07:02,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:07:03,461 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:07:03,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:07:03,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30119955] [2023-08-30 20:07:03,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30119955] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:07:03,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643938863] [2023-08-30 20:07:03,461 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 20:07:03,461 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:07:03,461 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:07:03,462 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) [2023-08-30 20:07:03,464 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-30 20:07:03,583 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 20:07:03,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:07:03,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-30 20:07:03,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:07:04,570 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:07:04,570 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:07:05,569 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:07:05,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1643938863] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:07:05,570 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:07:05,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 27 [2023-08-30 20:07:05,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844602010] [2023-08-30 20:07:05,570 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:07:05,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-30 20:07:05,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:07:05,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-30 20:07:05,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=639, Unknown=0, NotChecked=0, Total=812 [2023-08-30 20:07:07,088 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-30 20:07:07,607 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 148 [2023-08-30 20:07:07,608 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 823 places, 4159 transitions, 141643 flow. Second operand has 29 states, 29 states have (on average 56.03448275862069) internal successors, (1625), 29 states have internal predecessors, (1625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:07:07,608 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:07:07,608 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 148 [2023-08-30 20:07:07,608 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:07:48,405 INFO L130 PetriNetUnfolder]: 9845/17161 cut-off events. [2023-08-30 20:07:48,405 INFO L131 PetriNetUnfolder]: For 661586/661586 co-relation queries the response was YES. [2023-08-30 20:07:48,573 INFO L83 FinitePrefix]: Finished finitePrefix Result has 223168 conditions, 17161 events. 9845/17161 cut-off events. For 661586/661586 co-relation queries the response was YES. Maximal size of possible extension queue 1011. Compared 136539 event pairs, 18 based on Foata normal form. 33/17194 useless extension candidates. Maximal degree in co-relation 222885. Up to 6758 conditions per place. [2023-08-30 20:07:48,663 INFO L137 encePairwiseOnDemand]: 139/148 looper letters, 1492 selfloop transitions, 3175 changer transitions 178/4845 dead transitions. [2023-08-30 20:07:48,663 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 864 places, 4845 transitions, 168336 flow [2023-08-30 20:07:48,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2023-08-30 20:07:48,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2023-08-30 20:07:48,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 4446 transitions. [2023-08-30 20:07:48,667 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40054054054054056 [2023-08-30 20:07:48,667 INFO L72 ComplementDD]: Start complementDD. Operand 75 states and 4446 transitions. [2023-08-30 20:07:48,667 INFO L73 IsDeterministic]: Start isDeterministic. Operand 75 states and 4446 transitions. [2023-08-30 20:07:48,667 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:07:48,668 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 75 states and 4446 transitions. [2023-08-30 20:07:48,671 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 76 states, 75 states have (on average 59.28) internal successors, (4446), 75 states have internal predecessors, (4446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:07:48,676 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 76 states, 76 states have (on average 148.0) internal successors, (11248), 76 states have internal predecessors, (11248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:07:48,676 INFO L81 ComplementDD]: Finished complementDD. Result has 76 states, 76 states have (on average 148.0) internal successors, (11248), 76 states have internal predecessors, (11248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:07:48,676 INFO L175 Difference]: Start difference. First operand has 823 places, 4159 transitions, 141643 flow. Second operand 75 states and 4446 transitions. [2023-08-30 20:07:48,676 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 864 places, 4845 transitions, 168336 flow [2023-08-30 20:08:05,503 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 793 places, 4845 transitions, 164807 flow, removed 970 selfloop flow, removed 71 redundant places. [2023-08-30 20:08:05,605 INFO L231 Difference]: Finished difference. Result has 821 places, 4424 transitions, 155902 flow [2023-08-30 20:08:05,608 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=148, PETRI_DIFFERENCE_MINUEND_FLOW=138785, PETRI_DIFFERENCE_MINUEND_PLACES=719, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2922, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=75, PETRI_FLOW=155902, PETRI_PLACES=821, PETRI_TRANSITIONS=4424} [2023-08-30 20:08:05,609 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 799 predicate places. [2023-08-30 20:08:05,609 INFO L495 AbstractCegarLoop]: Abstraction has has 821 places, 4424 transitions, 155902 flow [2023-08-30 20:08:05,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 56.03448275862069) internal successors, (1625), 29 states have internal predecessors, (1625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:08:05,609 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:08:05,609 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:08:05,629 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-08-30 20:08:05,813 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,SelfDestructingSolverStorable16 [2023-08-30 20:08:05,813 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:08:05,814 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:08:05,814 INFO L85 PathProgramCache]: Analyzing trace with hash 1210939596, now seen corresponding path program 11 times [2023-08-30 20:08:05,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:08:05,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93030463] [2023-08-30 20:08:05,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:08:05,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:08:05,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:08:06,539 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:08:06,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:08:06,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93030463] [2023-08-30 20:08:06,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93030463] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:08:06,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153981242] [2023-08-30 20:08:06,539 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 20:08:06,539 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:08:06,539 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:08:06,540 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) [2023-08-30 20:08:06,542 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-08-30 20:08:06,651 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-30 20:08:06,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:08:06,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 32 conjunts are in the unsatisfiable core [2023-08-30 20:08:06,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:08:07,502 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:08:07,503 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:08:08,996 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:08:08,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [153981242] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:08:08,997 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:08:08,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 26 [2023-08-30 20:08:08,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780472683] [2023-08-30 20:08:08,997 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:08:08,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-08-30 20:08:08,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:08:08,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-08-30 20:08:08,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=622, Unknown=0, NotChecked=0, Total=756 [2023-08-30 20:08:10,133 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 148 [2023-08-30 20:08:10,134 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 821 places, 4424 transitions, 155902 flow. Second operand has 28 states, 28 states have (on average 56.107142857142854) internal successors, (1571), 28 states have internal predecessors, (1571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:08:10,134 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:08:10,134 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 148 [2023-08-30 20:08:10,134 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:08:56,107 INFO L130 PetriNetUnfolder]: 11049/19250 cut-off events. [2023-08-30 20:08:56,108 INFO L131 PetriNetUnfolder]: For 794310/794310 co-relation queries the response was YES. [2023-08-30 20:08:56,292 INFO L83 FinitePrefix]: Finished finitePrefix Result has 255245 conditions, 19250 events. 11049/19250 cut-off events. For 794310/794310 co-relation queries the response was YES. Maximal size of possible extension queue 1145. Compared 155709 event pairs, 131 based on Foata normal form. 32/19282 useless extension candidates. Maximal degree in co-relation 254651. Up to 5384 conditions per place. [2023-08-30 20:08:56,394 INFO L137 encePairwiseOnDemand]: 137/148 looper letters, 1354 selfloop transitions, 3904 changer transitions 201/5459 dead transitions. [2023-08-30 20:08:56,395 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 892 places, 5459 transitions, 196698 flow [2023-08-30 20:08:56,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2023-08-30 20:08:56,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2023-08-30 20:08:56,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 5276 transitions. [2023-08-30 20:08:56,399 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3960960960960961 [2023-08-30 20:08:56,399 INFO L72 ComplementDD]: Start complementDD. Operand 90 states and 5276 transitions. [2023-08-30 20:08:56,399 INFO L73 IsDeterministic]: Start isDeterministic. Operand 90 states and 5276 transitions. [2023-08-30 20:08:56,400 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:08:56,400 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 90 states and 5276 transitions. [2023-08-30 20:08:56,403 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 91 states, 90 states have (on average 58.62222222222222) internal successors, (5276), 90 states have internal predecessors, (5276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:08:56,408 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 91 states, 91 states have (on average 148.0) internal successors, (13468), 91 states have internal predecessors, (13468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:08:56,409 INFO L81 ComplementDD]: Finished complementDD. Result has 91 states, 91 states have (on average 148.0) internal successors, (13468), 91 states have internal predecessors, (13468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:08:56,409 INFO L175 Difference]: Start difference. First operand has 821 places, 4424 transitions, 155902 flow. Second operand 90 states and 5276 transitions. [2023-08-30 20:08:56,409 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 892 places, 5459 transitions, 196698 flow [2023-08-30 20:09:16,144 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 855 places, 5459 transitions, 195337 flow, removed 450 selfloop flow, removed 37 redundant places. [2023-08-30 20:09:16,263 INFO L231 Difference]: Finished difference. Result has 904 places, 5066 transitions, 190013 flow [2023-08-30 20:09:16,266 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=148, PETRI_DIFFERENCE_MINUEND_FLOW=155174, PETRI_DIFFERENCE_MINUEND_PLACES=766, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4424, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3300, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1071, PETRI_DIFFERENCE_SUBTRAHEND_STATES=90, PETRI_FLOW=190013, PETRI_PLACES=904, PETRI_TRANSITIONS=5066} [2023-08-30 20:09:16,267 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 882 predicate places. [2023-08-30 20:09:16,267 INFO L495 AbstractCegarLoop]: Abstraction has has 904 places, 5066 transitions, 190013 flow [2023-08-30 20:09:16,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 56.107142857142854) internal successors, (1571), 28 states have internal predecessors, (1571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:09:16,267 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:09:16,267 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:09:16,274 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-08-30 20:09:16,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:09:16,472 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:09:16,472 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:09:16,472 INFO L85 PathProgramCache]: Analyzing trace with hash 1563970112, now seen corresponding path program 12 times [2023-08-30 20:09:16,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:09:16,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84581897] [2023-08-30 20:09:16,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:09:16,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:09:16,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:09:17,613 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:09:17,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:09:17,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84581897] [2023-08-30 20:09:17,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84581897] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:09:17,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470758933] [2023-08-30 20:09:17,614 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 20:09:17,614 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:09:17,614 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:09:17,615 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) [2023-08-30 20:09:17,616 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-08-30 20:09:17,747 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-30 20:09:17,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:09:17,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 32 conjunts are in the unsatisfiable core [2023-08-30 20:09:17,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:09:18,540 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:09:18,540 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:09:23,499 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:09:23,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [470758933] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:09:23,499 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:09:23,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 28 [2023-08-30 20:09:23,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237901184] [2023-08-30 20:09:23,500 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:09:23,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-30 20:09:23,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:09:23,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-30 20:09:23,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=713, Unknown=1, NotChecked=0, Total=870 [2023-08-30 20:09:24,867 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 148 [2023-08-30 20:09:24,868 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 904 places, 5066 transitions, 190013 flow. Second operand has 30 states, 30 states have (on average 55.93333333333333) internal successors, (1678), 30 states have internal predecessors, (1678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:09:24,868 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:09:24,868 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 148 [2023-08-30 20:09:24,868 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:09:29,163 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-30 20:09:43,701 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-30 20:10:04,548 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-30 20:10:06,565 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-30 20:11:55,688 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.69s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-30 20:12:14,334 INFO L130 PetriNetUnfolder]: 12483/21686 cut-off events. [2023-08-30 20:12:14,334 INFO L131 PetriNetUnfolder]: For 1003043/1003043 co-relation queries the response was YES. [2023-08-30 20:12:14,581 INFO L83 FinitePrefix]: Finished finitePrefix Result has 306955 conditions, 21686 events. 12483/21686 cut-off events. For 1003043/1003043 co-relation queries the response was YES. Maximal size of possible extension queue 1316. Compared 177751 event pairs, 12 based on Foata normal form. 36/21722 useless extension candidates. Maximal degree in co-relation 306498. Up to 7561 conditions per place. [2023-08-30 20:12:14,739 INFO L137 encePairwiseOnDemand]: 138/148 looper letters, 1678 selfloop transitions, 4162 changer transitions 400/6240 dead transitions. [2023-08-30 20:12:14,740 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 981 places, 6240 transitions, 237793 flow [2023-08-30 20:12:14,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2023-08-30 20:12:14,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2023-08-30 20:12:14,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 5838 transitions. [2023-08-30 20:12:14,746 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3944594594594595 [2023-08-30 20:12:14,746 INFO L72 ComplementDD]: Start complementDD. Operand 100 states and 5838 transitions. [2023-08-30 20:12:14,747 INFO L73 IsDeterministic]: Start isDeterministic. Operand 100 states and 5838 transitions. [2023-08-30 20:12:14,749 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:12:14,749 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 100 states and 5838 transitions. [2023-08-30 20:12:14,767 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 101 states, 100 states have (on average 58.38) internal successors, (5838), 100 states have internal predecessors, (5838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:12:14,775 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 101 states, 101 states have (on average 148.0) internal successors, (14948), 101 states have internal predecessors, (14948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:12:14,776 INFO L81 ComplementDD]: Finished complementDD. Result has 101 states, 101 states have (on average 148.0) internal successors, (14948), 101 states have internal predecessors, (14948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:12:14,776 INFO L175 Difference]: Start difference. First operand has 904 places, 5066 transitions, 190013 flow. Second operand 100 states and 5838 transitions. [2023-08-30 20:12:14,777 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 981 places, 6240 transitions, 237793 flow [2023-08-30 20:12:44,799 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 936 places, 6240 transitions, 236545 flow, removed 410 selfloop flow, removed 45 redundant places. [2023-08-30 20:12:45,012 INFO L231 Difference]: Finished difference. Result has 971 places, 5522 transitions, 220748 flow [2023-08-30 20:12:45,015 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=148, PETRI_DIFFERENCE_MINUEND_FLOW=189079, PETRI_DIFFERENCE_MINUEND_PLACES=837, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=5066, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3625, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1340, PETRI_DIFFERENCE_SUBTRAHEND_STATES=100, PETRI_FLOW=220748, PETRI_PLACES=971, PETRI_TRANSITIONS=5522} [2023-08-30 20:12:45,016 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 949 predicate places. [2023-08-30 20:12:45,016 INFO L495 AbstractCegarLoop]: Abstraction has has 971 places, 5522 transitions, 220748 flow [2023-08-30 20:12:45,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 55.93333333333333) internal successors, (1678), 30 states have internal predecessors, (1678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:12:45,016 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:12:45,016 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:12:45,021 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-08-30 20:12:45,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:12:45,221 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:12:45,221 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:12:45,221 INFO L85 PathProgramCache]: Analyzing trace with hash -107313520, now seen corresponding path program 13 times [2023-08-30 20:12:45,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:12:45,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620353260] [2023-08-30 20:12:45,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:12:45,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:12:45,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:12:45,517 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:12:45,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:12:45,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620353260] [2023-08-30 20:12:45,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620353260] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:12:45,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357594934] [2023-08-30 20:12:45,518 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 20:12:45,518 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:12:45,518 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:12:45,519 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) [2023-08-30 20:12:45,521 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-08-30 20:12:45,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:12:45,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-30 20:12:45,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:12:45,884 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:12:45,884 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:12:46,080 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:12:46,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1357594934] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:12:46,080 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:12:46,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 15 [2023-08-30 20:12:46,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001969540] [2023-08-30 20:12:46,080 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:12:46,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-30 20:12:46,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:12:46,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-30 20:12:46,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2023-08-30 20:12:46,304 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 148 [2023-08-30 20:12:46,305 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 971 places, 5522 transitions, 220748 flow. Second operand has 16 states, 16 states have (on average 65.0) internal successors, (1040), 16 states have internal predecessors, (1040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:12:46,305 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:12:46,305 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 148 [2023-08-30 20:12:46,305 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:13:28,129 INFO L130 PetriNetUnfolder]: 14620/25298 cut-off events. [2023-08-30 20:13:28,129 INFO L131 PetriNetUnfolder]: For 1409701/1409701 co-relation queries the response was YES. [2023-08-30 20:13:28,451 INFO L83 FinitePrefix]: Finished finitePrefix Result has 376397 conditions, 25298 events. 14620/25298 cut-off events. For 1409701/1409701 co-relation queries the response was YES. Maximal size of possible extension queue 1498. Compared 211363 event pairs, 6 based on Foata normal form. 102/25400 useless extension candidates. Maximal degree in co-relation 375565. Up to 10498 conditions per place. [2023-08-30 20:13:28,645 INFO L137 encePairwiseOnDemand]: 140/148 looper letters, 2449 selfloop transitions, 4660 changer transitions 6/7134 dead transitions. [2023-08-30 20:13:28,645 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 965 places, 7134 transitions, 294462 flow [2023-08-30 20:13:28,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-08-30 20:13:28,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-08-30 20:13:28,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 2573 transitions. [2023-08-30 20:13:28,647 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46986851716581446 [2023-08-30 20:13:28,648 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 2573 transitions. [2023-08-30 20:13:28,648 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 2573 transitions. [2023-08-30 20:13:28,648 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:13:28,648 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 2573 transitions. [2023-08-30 20:13:28,650 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 69.54054054054055) internal successors, (2573), 37 states have internal predecessors, (2573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:13:28,652 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 148.0) internal successors, (5624), 38 states have internal predecessors, (5624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:13:28,652 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 148.0) internal successors, (5624), 38 states have internal predecessors, (5624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:13:28,652 INFO L175 Difference]: Start difference. First operand has 971 places, 5522 transitions, 220748 flow. Second operand 37 states and 2573 transitions. [2023-08-30 20:13:28,652 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 965 places, 7134 transitions, 294462 flow [2023-08-30 20:14:13,434 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 935 places, 7134 transitions, 293195 flow, removed 551 selfloop flow, removed 30 redundant places. [2023-08-30 20:14:13,615 INFO L231 Difference]: Finished difference. Result has 961 places, 6620 transitions, 288236 flow [2023-08-30 20:14:13,618 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=148, PETRI_DIFFERENCE_MINUEND_FLOW=220025, PETRI_DIFFERENCE_MINUEND_PLACES=899, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=5522, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3669, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1665, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=288236, PETRI_PLACES=961, PETRI_TRANSITIONS=6620} [2023-08-30 20:14:13,619 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 939 predicate places. [2023-08-30 20:14:13,619 INFO L495 AbstractCegarLoop]: Abstraction has has 961 places, 6620 transitions, 288236 flow [2023-08-30 20:14:13,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 65.0) internal successors, (1040), 16 states have internal predecessors, (1040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:14:13,619 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:14:13,619 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:14:13,628 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-08-30 20:14:13,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:14:13,824 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 20:14:13,824 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:14:13,824 INFO L85 PathProgramCache]: Analyzing trace with hash 131298591, now seen corresponding path program 14 times [2023-08-30 20:14:13,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:14:13,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391783266] [2023-08-30 20:14:13,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:14:13,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:14:13,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:14:22,174 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:14:22,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:14:22,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391783266] [2023-08-30 20:14:22,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391783266] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:14:22,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561435852] [2023-08-30 20:14:22,175 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 20:14:22,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:14:22,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:14:22,176 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) [2023-08-30 20:14:22,177 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-08-30 20:14:22,340 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 20:14:22,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:14:22,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 30 conjunts are in the unsatisfiable core [2023-08-30 20:14:22,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:14:24,100 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:14:24,100 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:14:33,415 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:14:33,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [561435852] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:14:33,416 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:14:33,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 30 [2023-08-30 20:14:33,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361579099] [2023-08-30 20:14:33,416 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:14:33,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-08-30 20:14:33,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:14:33,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-08-30 20:14:33,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=832, Unknown=2, NotChecked=0, Total=992 [2023-08-30 20:14:35,530 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.78s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-30 20:14:37,826 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.67s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-30 20:14:39,832 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-30 20:14:41,592 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.63s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-30 20:14:42,298 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 148 [2023-08-30 20:14:42,299 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 961 places, 6620 transitions, 288236 flow. Second operand has 32 states, 32 states have (on average 54.15625) internal successors, (1733), 32 states have internal predecessors, (1733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:14:42,299 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:14:42,299 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 148 [2023-08-30 20:14:42,299 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Killed by 15