/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-NoLbe.epf --traceabstraction.use.on-demand.petri.net.difference true -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/popl20-more-nonblocking-counter-alt2.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.repeated-lipton-8d0d62b [2022-12-06 18:08:22,065 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-06 18:08:22,066 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-06 18:08:22,105 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-06 18:08:22,105 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-06 18:08:22,107 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-06 18:08:22,109 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-06 18:08:22,114 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-06 18:08:22,115 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-06 18:08:22,118 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-06 18:08:22,119 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-06 18:08:22,120 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-06 18:08:22,120 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-06 18:08:22,122 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-06 18:08:22,123 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-06 18:08:22,125 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-06 18:08:22,126 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-06 18:08:22,126 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-06 18:08:22,128 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-06 18:08:22,131 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-06 18:08:22,132 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-06 18:08:22,133 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-06 18:08:22,134 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-06 18:08:22,135 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-06 18:08:22,140 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-06 18:08:22,140 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-06 18:08:22,140 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-06 18:08:22,141 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-06 18:08:22,141 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-06 18:08:22,142 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-06 18:08:22,142 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-06 18:08:22,146 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-06 18:08:22,147 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-06 18:08:22,148 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-06 18:08:22,148 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-06 18:08:22,149 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-06 18:08:22,149 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-06 18:08:22,149 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-06 18:08:22,149 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-06 18:08:22,150 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-06 18:08:22,150 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-06 18:08:22,151 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-NoLbe.epf [2022-12-06 18:08:22,171 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-06 18:08:22,171 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-06 18:08:22,172 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-06 18:08:22,172 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-06 18:08:22,173 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-06 18:08:22,173 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-06 18:08:22,173 INFO L138 SettingsManager]: * Use SBE=true [2022-12-06 18:08:22,174 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-06 18:08:22,174 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-06 18:08:22,174 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-06 18:08:22,174 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-06 18:08:22,175 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-06 18:08:22,175 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-06 18:08:22,175 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-06 18:08:22,175 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-06 18:08:22,175 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-06 18:08:22,175 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-06 18:08:22,175 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-06 18:08:22,175 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-06 18:08:22,175 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-06 18:08:22,176 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-06 18:08:22,176 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-12-06 18:08:22,176 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-06 18:08:22,176 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-06 18:08:22,176 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-06 18:08:22,176 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-06 18:08:22,176 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-06 18:08:22,176 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-06 18:08:22,176 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-06 18:08:22,176 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-12-06 18:08:22,177 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-06 18:08:22,177 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use on-demand Petri net difference -> true [2022-12-06 18:08:22,431 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-06 18:08:22,449 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-06 18:08:22,451 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-06 18:08:22,452 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-06 18:08:22,452 INFO L275 PluginConnector]: CDTParser initialized [2022-12-06 18:08:22,453 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-more-nonblocking-counter-alt2.wvr.c [2022-12-06 18:08:23,433 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-06 18:08:23,637 INFO L351 CDTParser]: Found 1 translation units. [2022-12-06 18:08:23,638 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-nonblocking-counter-alt2.wvr.c [2022-12-06 18:08:23,661 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bdefa1d03/b9b537493a8f46fb99bd111bcf85d6c8/FLAGde5a6cb02 [2022-12-06 18:08:23,675 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bdefa1d03/b9b537493a8f46fb99bd111bcf85d6c8 [2022-12-06 18:08:23,677 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-06 18:08:23,678 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-12-06 18:08:23,681 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-06 18:08:23,681 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-06 18:08:23,683 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-06 18:08:23,684 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 06:08:23" (1/1) ... [2022-12-06 18:08:23,684 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@29751ea9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:08:23, skipping insertion in model container [2022-12-06 18:08:23,685 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 06:08:23" (1/1) ... [2022-12-06 18:08:23,689 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-06 18:08:23,700 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-06 18:08:23,788 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-06 18:08:23,789 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-06 18:08:23,793 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-06 18:08:23,794 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-06 18:08:23,800 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-nonblocking-counter-alt2.wvr.c[2147,2160] [2022-12-06 18:08:23,804 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-06 18:08:23,811 INFO L203 MainTranslator]: Completed pre-run [2022-12-06 18:08:23,823 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-06 18:08:23,823 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-06 18:08:23,825 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-06 18:08:23,826 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-06 18:08:23,833 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-nonblocking-counter-alt2.wvr.c[2147,2160] [2022-12-06 18:08:23,838 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-06 18:08:23,847 INFO L208 MainTranslator]: Completed translation [2022-12-06 18:08:23,848 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:08:23 WrapperNode [2022-12-06 18:08:23,848 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-06 18:08:23,849 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-06 18:08:23,849 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-06 18:08:23,849 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-06 18:08:23,853 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:08:23" (1/1) ... [2022-12-06 18:08:23,859 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:08:23" (1/1) ... [2022-12-06 18:08:23,875 INFO L138 Inliner]: procedures = 21, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 55 [2022-12-06 18:08:23,876 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-06 18:08:23,876 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-06 18:08:23,877 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-06 18:08:23,877 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-06 18:08:23,882 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:08:23" (1/1) ... [2022-12-06 18:08:23,882 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:08:23" (1/1) ... [2022-12-06 18:08:23,892 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:08:23" (1/1) ... [2022-12-06 18:08:23,893 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:08:23" (1/1) ... [2022-12-06 18:08:23,900 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:08:23" (1/1) ... [2022-12-06 18:08:23,902 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:08:23" (1/1) ... [2022-12-06 18:08:23,903 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:08:23" (1/1) ... [2022-12-06 18:08:23,903 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:08:23" (1/1) ... [2022-12-06 18:08:23,905 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-06 18:08:23,905 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-06 18:08:23,905 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-06 18:08:23,905 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-06 18:08:23,906 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:08:23" (1/1) ... [2022-12-06 18:08:23,909 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-06 18:08:23,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-06 18:08:23,948 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) [2022-12-06 18:08:23,967 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 [2022-12-06 18:08:23,977 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-06 18:08:23,978 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-12-06 18:08:23,978 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-12-06 18:08:23,978 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-12-06 18:08:23,978 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-12-06 18:08:23,978 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-06 18:08:23,978 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-06 18:08:23,979 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-06 18:08:23,979 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-12-06 18:08:23,979 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-12-06 18:08:23,979 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-06 18:08:23,979 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-06 18:08:23,979 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-06 18:08:23,979 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-06 18:08:23,980 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2022-12-06 18:08:24,063 INFO L236 CfgBuilder]: Building ICFG [2022-12-06 18:08:24,065 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-06 18:08:24,248 INFO L277 CfgBuilder]: Performing block encoding [2022-12-06 18:08:24,286 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-06 18:08:24,286 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2022-12-06 18:08:24,288 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 06:08:24 BoogieIcfgContainer [2022-12-06 18:08:24,288 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-06 18:08:24,290 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-06 18:08:24,290 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-06 18:08:24,292 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-06 18:08:24,292 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 06:08:23" (1/3) ... [2022-12-06 18:08:24,293 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@87ba09f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 06:08:24, skipping insertion in model container [2022-12-06 18:08:24,293 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:08:23" (2/3) ... [2022-12-06 18:08:24,293 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@87ba09f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 06:08:24, skipping insertion in model container [2022-12-06 18:08:24,293 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 06:08:24" (3/3) ... [2022-12-06 18:08:24,294 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-nonblocking-counter-alt2.wvr.c [2022-12-06 18:08:24,307 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-06 18:08:24,307 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-06 18:08:24,308 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-06 18:08:24,370 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-12-06 18:08:24,400 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 78 places, 77 transitions, 170 flow [2022-12-06 18:08:24,442 INFO L130 PetriNetUnfolder]: 6/75 cut-off events. [2022-12-06 18:08:24,442 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-06 18:08:24,445 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84 conditions, 75 events. 6/75 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 39 event pairs, 0 based on Foata normal form. 0/68 useless extension candidates. Maximal degree in co-relation 45. Up to 2 conditions per place. [2022-12-06 18:08:24,445 INFO L82 GeneralOperation]: Start removeDead. Operand has 78 places, 77 transitions, 170 flow [2022-12-06 18:08:24,448 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 68 places, 67 transitions, 146 flow [2022-12-06 18:08:24,457 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-06 18:08:24,461 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=false, 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;@5530ded3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, Conditionality=CONDITIONAL_DISJUNCTIVE, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-06 18:08:24,461 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-12-06 18:08:24,486 INFO L130 PetriNetUnfolder]: 6/66 cut-off events. [2022-12-06 18:08:24,486 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-06 18:08:24,486 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-06 18:08:24,487 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-06 18:08:24,487 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-06 18:08:24,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-06 18:08:24,490 INFO L85 PathProgramCache]: Analyzing trace with hash 1972558308, now seen corresponding path program 1 times [2022-12-06 18:08:24,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-06 18:08:24,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146566299] [2022-12-06 18:08:24,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-06 18:08:24,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-06 18:08:24,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-06 18:08:24,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-06 18:08:24,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-06 18:08:24,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146566299] [2022-12-06 18:08:24,979 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146566299] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-06 18:08:24,979 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-06 18:08:24,979 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-06 18:08:24,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101468356] [2022-12-06 18:08:24,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-06 18:08:24,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-06 18:08:24,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-06 18:08:25,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-06 18:08:25,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-12-06 18:08:25,019 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 77 [2022-12-06 18:08:25,021 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 67 transitions, 146 flow. Second operand has 6 states, 6 states have (on average 50.833333333333336) internal successors, (305), 6 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-06 18:08:25,022 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-06 18:08:25,022 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 77 [2022-12-06 18:08:25,022 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-06 18:08:25,175 INFO L130 PetriNetUnfolder]: 52/167 cut-off events. [2022-12-06 18:08:25,176 INFO L131 PetriNetUnfolder]: For 24/24 co-relation queries the response was YES. [2022-12-06 18:08:25,176 INFO L83 FinitePrefix]: Finished finitePrefix Result has 302 conditions, 167 events. 52/167 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 474 event pairs, 20 based on Foata normal form. 2/141 useless extension candidates. Maximal degree in co-relation 217. Up to 70 conditions per place. [2022-12-06 18:08:25,178 INFO L137 encePairwiseOnDemand]: 67/77 looper letters, 24 selfloop transitions, 5 changer transitions 2/70 dead transitions. [2022-12-06 18:08:25,178 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 70 transitions, 217 flow [2022-12-06 18:08:25,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-06 18:08:25,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-06 18:08:25,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 326 transitions. [2022-12-06 18:08:25,193 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.7056277056277056 [2022-12-06 18:08:25,195 INFO L294 CegarLoopForPetriNet]: 68 programPoint places, 5 predicate places. [2022-12-06 18:08:25,195 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 70 transitions, 217 flow [2022-12-06 18:08:25,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 50.833333333333336) internal successors, (305), 6 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-06 18:08:25,196 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-06 18:08:25,196 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-06 18:08:25,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-06 18:08:25,196 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-06 18:08:25,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-06 18:08:25,197 INFO L85 PathProgramCache]: Analyzing trace with hash 856991610, now seen corresponding path program 1 times [2022-12-06 18:08:25,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-06 18:08:25,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214689449] [2022-12-06 18:08:25,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-06 18:08:25,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-06 18:08:25,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-06 18:08:25,431 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-06 18:08:25,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-06 18:08:25,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214689449] [2022-12-06 18:08:25,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214689449] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-06 18:08:25,433 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-06 18:08:25,433 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-06 18:08:25,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644006092] [2022-12-06 18:08:25,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-06 18:08:25,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-06 18:08:25,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-06 18:08:25,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-06 18:08:25,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-06 18:08:25,438 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 77 [2022-12-06 18:08:25,439 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 70 transitions, 217 flow. Second operand has 5 states, 5 states have (on average 58.8) internal successors, (294), 5 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-06 18:08:25,439 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-06 18:08:25,439 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 77 [2022-12-06 18:08:25,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-06 18:08:25,574 INFO L130 PetriNetUnfolder]: 69/246 cut-off events. [2022-12-06 18:08:25,574 INFO L131 PetriNetUnfolder]: For 80/100 co-relation queries the response was YES. [2022-12-06 18:08:25,575 INFO L83 FinitePrefix]: Finished finitePrefix Result has 575 conditions, 246 events. 69/246 cut-off events. For 80/100 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 946 event pairs, 18 based on Foata normal form. 2/217 useless extension candidates. Maximal degree in co-relation 439. Up to 101 conditions per place. [2022-12-06 18:08:25,576 INFO L137 encePairwiseOnDemand]: 70/77 looper letters, 38 selfloop transitions, 7 changer transitions 3/93 dead transitions. [2022-12-06 18:08:25,576 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 93 transitions, 410 flow [2022-12-06 18:08:25,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-06 18:08:25,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-06 18:08:25,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 369 transitions. [2022-12-06 18:08:25,579 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.7987012987012987 [2022-12-06 18:08:25,580 INFO L294 CegarLoopForPetriNet]: 68 programPoint places, 10 predicate places. [2022-12-06 18:08:25,580 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 93 transitions, 410 flow [2022-12-06 18:08:25,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 58.8) internal successors, (294), 5 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-06 18:08:25,580 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-06 18:08:25,580 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-06 18:08:25,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-06 18:08:25,581 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-06 18:08:25,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-06 18:08:25,581 INFO L85 PathProgramCache]: Analyzing trace with hash -203384410, now seen corresponding path program 2 times [2022-12-06 18:08:25,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-06 18:08:25,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146125332] [2022-12-06 18:08:25,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-06 18:08:25,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-06 18:08:25,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-06 18:08:25,691 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-06 18:08:25,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-06 18:08:25,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146125332] [2022-12-06 18:08:25,692 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146125332] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-06 18:08:25,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725821722] [2022-12-06 18:08:25,692 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-06 18:08:25,693 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-06 18:08:25,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-06 18:08:25,695 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) [2022-12-06 18:08:25,760 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-06 18:08:25,804 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-06 18:08:25,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-06 18:08:25,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-06 18:08:25,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-06 18:08:26,006 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-06 18:08:26,006 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-06 18:08:26,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1725821722] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-06 18:08:26,007 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-06 18:08:26,007 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 8 [2022-12-06 18:08:26,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923091767] [2022-12-06 18:08:26,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-06 18:08:26,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-06 18:08:26,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-06 18:08:26,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-06 18:08:26,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-12-06 18:08:26,011 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 77 [2022-12-06 18:08:26,011 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 93 transitions, 410 flow. Second operand has 6 states, 6 states have (on average 53.0) internal successors, (318), 6 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-06 18:08:26,011 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-06 18:08:26,011 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 77 [2022-12-06 18:08:26,011 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-06 18:08:26,166 INFO L130 PetriNetUnfolder]: 63/203 cut-off events. [2022-12-06 18:08:26,167 INFO L131 PetriNetUnfolder]: For 125/154 co-relation queries the response was YES. [2022-12-06 18:08:26,170 INFO L83 FinitePrefix]: Finished finitePrefix Result has 595 conditions, 203 events. 63/203 cut-off events. For 125/154 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 681 event pairs, 18 based on Foata normal form. 2/184 useless extension candidates. Maximal degree in co-relation 458. Up to 93 conditions per place. [2022-12-06 18:08:26,172 INFO L137 encePairwiseOnDemand]: 69/77 looper letters, 25 selfloop transitions, 8 changer transitions 2/83 dead transitions. [2022-12-06 18:08:26,172 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 83 transitions, 414 flow [2022-12-06 18:08:26,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-06 18:08:26,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-06 18:08:26,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 428 transitions. [2022-12-06 18:08:26,178 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.6948051948051948 [2022-12-06 18:08:26,179 INFO L294 CegarLoopForPetriNet]: 68 programPoint places, 15 predicate places. [2022-12-06 18:08:26,179 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 83 transitions, 414 flow [2022-12-06 18:08:26,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 53.0) internal successors, (318), 6 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-06 18:08:26,179 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-06 18:08:26,179 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-06 18:08:26,196 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-12-06 18:08:26,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-06 18:08:26,385 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-06 18:08:26,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-06 18:08:26,387 INFO L85 PathProgramCache]: Analyzing trace with hash -1245133015, now seen corresponding path program 1 times [2022-12-06 18:08:26,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-06 18:08:26,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332359276] [2022-12-06 18:08:26,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-06 18:08:26,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-06 18:08:26,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-06 18:08:26,773 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-06 18:08:26,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-06 18:08:26,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332359276] [2022-12-06 18:08:26,773 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332359276] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-06 18:08:26,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996925114] [2022-12-06 18:08:26,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-06 18:08:26,774 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-06 18:08:26,774 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-06 18:08:26,775 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) [2022-12-06 18:08:26,778 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-06 18:08:26,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-06 18:08:26,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-06 18:08:26,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-06 18:08:28,080 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-06 18:08:28,081 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-06 18:08:28,394 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-06 18:08:28,394 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1996925114] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-06 18:08:28,394 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-06 18:08:28,394 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 7] total 16 [2022-12-06 18:08:28,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900329336] [2022-12-06 18:08:28,394 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-06 18:08:28,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-06 18:08:28,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-06 18:08:28,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-06 18:08:28,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2022-12-06 18:08:28,396 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 77 [2022-12-06 18:08:28,397 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 83 transitions, 414 flow. Second operand has 16 states, 16 states have (on average 46.6875) internal successors, (747), 16 states have internal predecessors, (747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-06 18:08:28,397 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-06 18:08:28,397 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 77 [2022-12-06 18:08:28,397 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-06 18:08:29,071 INFO L130 PetriNetUnfolder]: 214/631 cut-off events. [2022-12-06 18:08:29,083 INFO L131 PetriNetUnfolder]: For 806/883 co-relation queries the response was YES. [2022-12-06 18:08:29,085 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2320 conditions, 631 events. 214/631 cut-off events. For 806/883 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 3344 event pairs, 0 based on Foata normal form. 6/564 useless extension candidates. Maximal degree in co-relation 1869. Up to 324 conditions per place. [2022-12-06 18:08:29,092 INFO L137 encePairwiseOnDemand]: 61/77 looper letters, 118 selfloop transitions, 51 changer transitions 30/233 dead transitions. [2022-12-06 18:08:29,092 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 233 transitions, 1914 flow [2022-12-06 18:08:29,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-12-06 18:08:29,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2022-12-06 18:08:29,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1270 transitions. [2022-12-06 18:08:29,095 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.6343656343656343 [2022-12-06 18:08:29,095 INFO L294 CegarLoopForPetriNet]: 68 programPoint places, 40 predicate places. [2022-12-06 18:08:29,095 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 233 transitions, 1914 flow [2022-12-06 18:08:29,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 46.6875) internal successors, (747), 16 states have internal predecessors, (747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-06 18:08:29,096 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-06 18:08:29,096 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-06 18:08:29,132 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-12-06 18:08:29,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-12-06 18:08:29,319 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-06 18:08:29,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-06 18:08:29,320 INFO L85 PathProgramCache]: Analyzing trace with hash -1970713953, now seen corresponding path program 2 times [2022-12-06 18:08:29,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-06 18:08:29,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958342515] [2022-12-06 18:08:29,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-06 18:08:29,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-06 18:08:29,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-06 18:08:29,696 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-06 18:08:29,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-06 18:08:29,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958342515] [2022-12-06 18:08:29,701 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958342515] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-06 18:08:29,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146954159] [2022-12-06 18:08:29,702 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-06 18:08:29,702 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-06 18:08:29,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-06 18:08:29,709 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) [2022-12-06 18:08:29,776 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-06 18:08:29,806 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-06 18:08:29,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-06 18:08:29,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-06 18:08:29,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-06 18:08:29,951 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-06 18:08:29,951 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-06 18:08:30,241 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-06 18:08:30,241 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [146954159] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-06 18:08:30,241 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-06 18:08:30,241 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2022-12-06 18:08:30,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989453108] [2022-12-06 18:08:30,242 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-06 18:08:30,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-06 18:08:30,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-06 18:08:30,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-06 18:08:30,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2022-12-06 18:08:30,245 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 77 [2022-12-06 18:08:30,246 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 233 transitions, 1914 flow. Second operand has 15 states, 15 states have (on average 55.333333333333336) internal successors, (830), 15 states have internal predecessors, (830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-06 18:08:30,246 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-06 18:08:30,246 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 77 [2022-12-06 18:08:30,246 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-06 18:08:30,624 INFO L130 PetriNetUnfolder]: 298/921 cut-off events. [2022-12-06 18:08:30,624 INFO L131 PetriNetUnfolder]: For 1742/1856 co-relation queries the response was YES. [2022-12-06 18:08:30,626 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3946 conditions, 921 events. 298/921 cut-off events. For 1742/1856 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 5811 event pairs, 9 based on Foata normal form. 32/872 useless extension candidates. Maximal degree in co-relation 2922. Up to 486 conditions per place. [2022-12-06 18:08:30,630 INFO L137 encePairwiseOnDemand]: 67/77 looper letters, 190 selfloop transitions, 77 changer transitions 79/391 dead transitions. [2022-12-06 18:08:30,630 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 391 transitions, 4112 flow [2022-12-06 18:08:30,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-06 18:08:30,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-12-06 18:08:30,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 819 transitions. [2022-12-06 18:08:30,637 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.7597402597402597 [2022-12-06 18:08:30,639 INFO L294 CegarLoopForPetriNet]: 68 programPoint places, 52 predicate places. [2022-12-06 18:08:30,639 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 391 transitions, 4112 flow [2022-12-06 18:08:30,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 55.333333333333336) internal successors, (830), 15 states have internal predecessors, (830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-06 18:08:30,639 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-06 18:08:30,639 INFO L213 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-06 18:08:30,655 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-12-06 18:08:30,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-06 18:08:30,852 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-06 18:08:30,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-06 18:08:30,853 INFO L85 PathProgramCache]: Analyzing trace with hash 1426559175, now seen corresponding path program 3 times [2022-12-06 18:08:30,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-06 18:08:30,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752001939] [2022-12-06 18:08:30,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-06 18:08:30,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-06 18:08:30,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-06 18:08:31,235 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-06 18:08:31,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-06 18:08:31,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752001939] [2022-12-06 18:08:31,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752001939] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-06 18:08:31,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071348210] [2022-12-06 18:08:31,240 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-06 18:08:31,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-06 18:08:31,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-06 18:08:31,273 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) [2022-12-06 18:08:31,342 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-06 18:08:31,433 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-06 18:08:31,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-06 18:08:31,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-06 18:08:31,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-06 18:08:31,588 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-06 18:08:31,588 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-06 18:08:31,853 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-06 18:08:31,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2071348210] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-06 18:08:31,853 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-06 18:08:31,853 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 11] total 19 [2022-12-06 18:08:31,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908345365] [2022-12-06 18:08:31,854 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-06 18:08:31,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-06 18:08:31,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-06 18:08:31,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-06 18:08:31,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2022-12-06 18:08:31,855 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 77 [2022-12-06 18:08:31,856 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 391 transitions, 4112 flow. Second operand has 19 states, 19 states have (on average 46.94736842105263) internal successors, (892), 19 states have internal predecessors, (892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-06 18:08:31,856 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-06 18:08:31,856 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 77 [2022-12-06 18:08:31,856 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-06 18:08:37,512 INFO L130 PetriNetUnfolder]: 549/1512 cut-off events. [2022-12-06 18:08:37,512 INFO L131 PetriNetUnfolder]: For 4164/4385 co-relation queries the response was YES. [2022-12-06 18:08:37,532 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7914 conditions, 1512 events. 549/1512 cut-off events. For 4164/4385 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 10282 event pairs, 1 based on Foata normal form. 54/1439 useless extension candidates. Maximal degree in co-relation 6109. Up to 926 conditions per place. [2022-12-06 18:08:37,550 INFO L137 encePairwiseOnDemand]: 64/77 looper letters, 289 selfloop transitions, 426 changer transitions 119/869 dead transitions. [2022-12-06 18:08:37,550 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 869 transitions, 11251 flow [2022-12-06 18:08:37,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-12-06 18:08:37,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-12-06 18:08:37,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 2180 transitions. [2022-12-06 18:08:37,568 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.6291486291486291 [2022-12-06 18:08:37,570 INFO L294 CegarLoopForPetriNet]: 68 programPoint places, 96 predicate places. [2022-12-06 18:08:37,570 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 869 transitions, 11251 flow [2022-12-06 18:08:37,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 46.94736842105263) internal successors, (892), 19 states have internal predecessors, (892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-06 18:08:37,571 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-06 18:08:37,571 INFO L213 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-06 18:08:37,607 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-12-06 18:08:37,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-06 18:08:37,776 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-06 18:08:37,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-06 18:08:37,780 INFO L85 PathProgramCache]: Analyzing trace with hash 1898064731, now seen corresponding path program 4 times [2022-12-06 18:08:37,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-06 18:08:37,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376736740] [2022-12-06 18:08:37,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-06 18:08:37,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-06 18:08:37,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-06 18:08:40,248 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-06 18:08:40,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-06 18:08:40,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376736740] [2022-12-06 18:08:40,248 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376736740] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-06 18:08:40,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761064142] [2022-12-06 18:08:40,249 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-06 18:08:40,249 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-06 18:08:40,249 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-06 18:08:40,263 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) [2022-12-06 18:08:40,280 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-06 18:08:40,382 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-06 18:08:40,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-06 18:08:40,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-06 18:08:40,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-06 18:08:42,397 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-06 18:08:42,398 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-06 18:08:44,499 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-06 18:08:44,499 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1761064142] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-06 18:08:44,499 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-06 18:08:44,499 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 11] total 22 [2022-12-06 18:08:44,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246878506] [2022-12-06 18:08:44,500 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-06 18:08:44,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-12-06 18:08:44,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-06 18:08:44,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-12-06 18:08:44,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2022-12-06 18:08:44,501 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 77 [2022-12-06 18:08:44,502 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 869 transitions, 11251 flow. Second operand has 22 states, 22 states have (on average 46.95454545454545) internal successors, (1033), 22 states have internal predecessors, (1033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-06 18:08:44,502 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-06 18:08:44,502 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 77 [2022-12-06 18:08:44,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-06 18:08:47,544 INFO L130 PetriNetUnfolder]: 699/1912 cut-off events. [2022-12-06 18:08:47,545 INFO L131 PetriNetUnfolder]: For 6537/6892 co-relation queries the response was YES. [2022-12-06 18:08:47,547 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11601 conditions, 1912 events. 699/1912 cut-off events. For 6537/6892 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 13884 event pairs, 1 based on Foata normal form. 86/1853 useless extension candidates. Maximal degree in co-relation 10685. Up to 1210 conditions per place. [2022-12-06 18:08:47,598 INFO L137 encePairwiseOnDemand]: 63/77 looper letters, 346 selfloop transitions, 607 changer transitions 136/1124 dead transitions. [2022-12-06 18:08:47,599 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 1124 transitions, 16812 flow [2022-12-06 18:08:47,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-12-06 18:08:47,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2022-12-06 18:08:47,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 2420 transitions. [2022-12-06 18:08:47,603 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.6285714285714286 [2022-12-06 18:08:47,604 INFO L294 CegarLoopForPetriNet]: 68 programPoint places, 145 predicate places. [2022-12-06 18:08:47,604 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 1124 transitions, 16812 flow [2022-12-06 18:08:47,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 46.95454545454545) internal successors, (1033), 22 states have internal predecessors, (1033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-06 18:08:47,605 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-06 18:08:47,605 INFO L213 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-06 18:08:47,635 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-12-06 18:08:47,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-06 18:08:47,811 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-06 18:08:47,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-06 18:08:47,812 INFO L85 PathProgramCache]: Analyzing trace with hash -210048359, now seen corresponding path program 5 times [2022-12-06 18:08:47,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-06 18:08:47,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176150329] [2022-12-06 18:08:47,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-06 18:08:47,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-06 18:08:47,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-06 18:08:48,243 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-06 18:08:48,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-06 18:08:48,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176150329] [2022-12-06 18:08:48,249 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176150329] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-06 18:08:48,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710089927] [2022-12-06 18:08:48,249 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-06 18:08:48,250 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-06 18:08:48,250 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-06 18:08:48,275 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) [2022-12-06 18:08:48,304 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-06 18:08:48,365 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-12-06 18:08:48,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-06 18:08:48,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-06 18:08:48,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-06 18:08:48,578 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-06 18:08:48,578 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-06 18:08:49,002 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-06 18:08:49,003 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [710089927] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-06 18:08:49,003 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-06 18:08:49,003 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 9] total 20 [2022-12-06 18:08:49,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573829120] [2022-12-06 18:08:49,003 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-06 18:08:49,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-06 18:08:49,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-06 18:08:49,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-06 18:08:49,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2022-12-06 18:08:49,008 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 77 [2022-12-06 18:08:49,009 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 1124 transitions, 16812 flow. Second operand has 20 states, 20 states have (on average 56.95) internal successors, (1139), 20 states have internal predecessors, (1139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-06 18:08:49,009 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-06 18:08:49,010 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 77 [2022-12-06 18:08:49,010 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-06 18:08:52,101 INFO L130 PetriNetUnfolder]: 874/2480 cut-off events. [2022-12-06 18:08:52,101 INFO L131 PetriNetUnfolder]: For 10490/11007 co-relation queries the response was YES. [2022-12-06 18:08:52,129 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16426 conditions, 2480 events. 874/2480 cut-off events. For 10490/11007 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 19743 event pairs, 2 based on Foata normal form. 68/2357 useless extension candidates. Maximal degree in co-relation 13141. Up to 1540 conditions per place. [2022-12-06 18:08:52,175 INFO L137 encePairwiseOnDemand]: 65/77 looper letters, 300 selfloop transitions, 871 changer transitions 217/1499 dead transitions. [2022-12-06 18:08:52,175 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 1499 transitions, 25356 flow [2022-12-06 18:08:52,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-12-06 18:08:52,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2022-12-06 18:08:52,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 2682 transitions. [2022-12-06 18:08:52,190 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.7571993224167137 [2022-12-06 18:08:52,192 INFO L294 CegarLoopForPetriNet]: 68 programPoint places, 190 predicate places. [2022-12-06 18:08:52,192 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 1499 transitions, 25356 flow [2022-12-06 18:08:52,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 56.95) internal successors, (1139), 20 states have internal predecessors, (1139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-06 18:08:52,192 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-06 18:08:52,192 INFO L213 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-06 18:08:52,203 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-12-06 18:08:52,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-06 18:08:52,399 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-06 18:08:52,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-06 18:08:52,400 INFO L85 PathProgramCache]: Analyzing trace with hash -2019438837, now seen corresponding path program 6 times [2022-12-06 18:08:52,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-06 18:08:52,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300728636] [2022-12-06 18:08:52,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-06 18:08:52,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-06 18:08:52,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-06 18:08:52,849 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-06 18:08:52,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-06 18:08:52,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300728636] [2022-12-06 18:08:52,855 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300728636] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-06 18:08:52,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816856230] [2022-12-06 18:08:52,855 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-06 18:08:52,856 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-06 18:08:52,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-06 18:08:52,858 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) [2022-12-06 18:08:52,903 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-06 18:08:53,002 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-12-06 18:08:53,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-06 18:08:53,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-06 18:08:53,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-06 18:08:53,181 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-06 18:08:53,182 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-06 18:08:53,513 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-06 18:08:53,514 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1816856230] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-06 18:08:53,514 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-06 18:08:53,514 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 21 [2022-12-06 18:08:53,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465634365] [2022-12-06 18:08:53,515 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-06 18:08:53,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-06 18:08:53,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-06 18:08:53,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-06 18:08:53,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2022-12-06 18:08:53,517 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 77 [2022-12-06 18:08:53,518 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 1499 transitions, 25356 flow. Second operand has 21 states, 21 states have (on average 57.23809523809524) internal successors, (1202), 21 states have internal predecessors, (1202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-06 18:08:53,518 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-06 18:08:53,518 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 77 [2022-12-06 18:08:53,518 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-06 18:08:57,806 INFO L130 PetriNetUnfolder]: 1281/3860 cut-off events. [2022-12-06 18:08:57,807 INFO L131 PetriNetUnfolder]: For 20150/21330 co-relation queries the response was YES. [2022-12-06 18:08:57,821 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27825 conditions, 3860 events. 1281/3860 cut-off events. For 20150/21330 co-relation queries the response was YES. Maximal size of possible extension queue 275. Compared 35128 event pairs, 6 based on Foata normal form. 155/3663 useless extension candidates. Maximal degree in co-relation 22911. Up to 2465 conditions per place. [2022-12-06 18:08:57,889 INFO L137 encePairwiseOnDemand]: 64/77 looper letters, 611 selfloop transitions, 1106 changer transitions 362/2190 dead transitions. [2022-12-06 18:08:57,890 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 2190 transitions, 41822 flow [2022-12-06 18:08:57,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-12-06 18:08:57,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2022-12-06 18:08:57,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 3743 transitions. [2022-12-06 18:08:57,955 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.7715934858792002 [2022-12-06 18:08:57,956 INFO L294 CegarLoopForPetriNet]: 68 programPoint places, 252 predicate places. [2022-12-06 18:08:57,956 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 2190 transitions, 41822 flow [2022-12-06 18:08:57,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 57.23809523809524) internal successors, (1202), 21 states have internal predecessors, (1202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-06 18:08:57,958 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-06 18:08:57,958 INFO L213 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-06 18:08:57,985 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-06 18:08:58,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-06 18:08:58,175 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-06 18:08:58,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-06 18:08:58,176 INFO L85 PathProgramCache]: Analyzing trace with hash 177334283, now seen corresponding path program 7 times [2022-12-06 18:08:58,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-06 18:08:58,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263901189] [2022-12-06 18:08:58,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-06 18:08:58,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-06 18:08:58,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-06 18:08:58,538 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-06 18:08:58,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-06 18:08:58,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263901189] [2022-12-06 18:08:58,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263901189] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-06 18:08:58,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491927934] [2022-12-06 18:08:58,539 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-06 18:08:58,539 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-06 18:08:58,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-06 18:08:58,541 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) [2022-12-06 18:08:58,603 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-06 18:08:58,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-06 18:08:58,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-06 18:08:58,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-06 18:08:58,873 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-06 18:08:58,873 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-06 18:08:59,090 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-06 18:08:59,096 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1491927934] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-06 18:08:59,096 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-06 18:08:59,096 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 17 [2022-12-06 18:08:59,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50409842] [2022-12-06 18:08:59,096 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-06 18:08:59,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-06 18:08:59,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-06 18:08:59,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-06 18:08:59,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2022-12-06 18:08:59,098 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 77 [2022-12-06 18:08:59,099 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 2190 transitions, 41822 flow. Second operand has 17 states, 17 states have (on average 57.294117647058826) internal successors, (974), 17 states have internal predecessors, (974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-06 18:08:59,099 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-06 18:08:59,099 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 77 [2022-12-06 18:08:59,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-06 18:09:04,403 INFO L130 PetriNetUnfolder]: 1845/6278 cut-off events. [2022-12-06 18:09:04,404 INFO L131 PetriNetUnfolder]: For 39565/41339 co-relation queries the response was YES. [2022-12-06 18:09:04,419 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47518 conditions, 6278 events. 1845/6278 cut-off events. For 39565/41339 co-relation queries the response was YES. Maximal size of possible extension queue 469. Compared 66148 event pairs, 9 based on Foata normal form. 239/5896 useless extension candidates. Maximal degree in co-relation 33913. Up to 4004 conditions per place. [2022-12-06 18:09:04,489 INFO L137 encePairwiseOnDemand]: 64/77 looper letters, 830 selfloop transitions, 1683 changer transitions 629/3253 dead transitions. [2022-12-06 18:09:04,489 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 373 places, 3253 transitions, 69187 flow [2022-12-06 18:09:04,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-12-06 18:09:04,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2022-12-06 18:09:04,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 3187 transitions. [2022-12-06 18:09:04,509 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.7664742664742664 [2022-12-06 18:09:04,509 INFO L294 CegarLoopForPetriNet]: 68 programPoint places, 305 predicate places. [2022-12-06 18:09:04,509 INFO L495 AbstractCegarLoop]: Abstraction has has 373 places, 3253 transitions, 69187 flow [2022-12-06 18:09:04,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 57.294117647058826) internal successors, (974), 17 states have internal predecessors, (974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-06 18:09:04,510 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-06 18:09:04,510 INFO L213 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-06 18:09:04,521 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-12-06 18:09:04,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-12-06 18:09:04,719 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-06 18:09:04,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-06 18:09:04,720 INFO L85 PathProgramCache]: Analyzing trace with hash -862465983, now seen corresponding path program 8 times [2022-12-06 18:09:04,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-06 18:09:04,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352525893] [2022-12-06 18:09:04,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-06 18:09:04,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-06 18:09:04,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-06 18:09:04,938 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-06 18:09:04,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-06 18:09:04,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352525893] [2022-12-06 18:09:04,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352525893] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-06 18:09:04,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124299944] [2022-12-06 18:09:04,939 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-06 18:09:04,939 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-06 18:09:04,939 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-06 18:09:04,940 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) [2022-12-06 18:09:04,942 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-06 18:09:04,990 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-06 18:09:04,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-06 18:09:04,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-06 18:09:04,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-06 18:09:05,189 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-06 18:09:05,190 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-06 18:09:05,398 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-06 18:09:05,399 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [124299944] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-06 18:09:05,399 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-06 18:09:05,399 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 11] total 22 [2022-12-06 18:09:05,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62008173] [2022-12-06 18:09:05,399 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-06 18:09:05,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-12-06 18:09:05,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-06 18:09:05,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-12-06 18:09:05,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2022-12-06 18:09:05,401 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 77 [2022-12-06 18:09:05,401 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 373 places, 3253 transitions, 69187 flow. Second operand has 22 states, 22 states have (on average 47.0) internal successors, (1034), 22 states have internal predecessors, (1034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-06 18:09:05,402 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-06 18:09:05,402 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 77 [2022-12-06 18:09:05,402 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-06 18:09:10,057 INFO L130 PetriNetUnfolder]: 1983/6581 cut-off events. [2022-12-06 18:09:10,058 INFO L131 PetriNetUnfolder]: For 48539/50511 co-relation queries the response was YES. [2022-12-06 18:09:10,065 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55186 conditions, 6581 events. 1983/6581 cut-off events. For 48539/50511 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 69426 event pairs, 8 based on Foata normal form. 267/6227 useless extension candidates. Maximal degree in co-relation 49437. Up to 4232 conditions per place. [2022-12-06 18:09:10,123 INFO L137 encePairwiseOnDemand]: 63/77 looper letters, 851 selfloop transitions, 1974 changer transitions 636/3496 dead transitions. [2022-12-06 18:09:10,124 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 427 places, 3496 transitions, 81052 flow [2022-12-06 18:09:10,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-12-06 18:09:10,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2022-12-06 18:09:10,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 2633 transitions. [2022-12-06 18:09:10,127 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.6217237308146399 [2022-12-06 18:09:10,127 INFO L294 CegarLoopForPetriNet]: 68 programPoint places, 359 predicate places. [2022-12-06 18:09:10,127 INFO L495 AbstractCegarLoop]: Abstraction has has 427 places, 3496 transitions, 81052 flow [2022-12-06 18:09:10,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 47.0) internal successors, (1034), 22 states have internal predecessors, (1034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-06 18:09:10,128 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-06 18:09:10,128 INFO L213 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-06 18:09:10,148 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-12-06 18:09:10,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-06 18:09:10,334 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-06 18:09:10,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-06 18:09:10,335 INFO L85 PathProgramCache]: Analyzing trace with hash 2094260035, now seen corresponding path program 9 times [2022-12-06 18:09:10,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-06 18:09:10,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756483571] [2022-12-06 18:09:10,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-06 18:09:10,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-06 18:09:10,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-06 18:09:10,550 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-06 18:09:10,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-06 18:09:10,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756483571] [2022-12-06 18:09:10,550 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756483571] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-06 18:09:10,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342878018] [2022-12-06 18:09:10,552 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-06 18:09:10,552 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-06 18:09:10,552 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-06 18:09:10,553 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) [2022-12-06 18:09:10,560 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-06 18:09:10,620 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-06 18:09:10,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-06 18:09:10,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-06 18:09:10,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-06 18:09:10,738 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-06 18:09:10,739 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-06 18:09:10,929 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-06 18:09:10,929 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1342878018] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-06 18:09:10,929 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-06 18:09:10,929 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 17 [2022-12-06 18:09:10,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033628103] [2022-12-06 18:09:10,930 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-06 18:09:10,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-06 18:09:10,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-06 18:09:10,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-06 18:09:10,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2022-12-06 18:09:10,931 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 77 [2022-12-06 18:09:10,932 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 427 places, 3496 transitions, 81052 flow. Second operand has 17 states, 17 states have (on average 57.0) internal successors, (969), 17 states have internal predecessors, (969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-06 18:09:10,932 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-06 18:09:10,932 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 77 [2022-12-06 18:09:10,932 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-06 18:09:16,977 INFO L130 PetriNetUnfolder]: 2339/7664 cut-off events. [2022-12-06 18:09:16,977 INFO L131 PetriNetUnfolder]: For 65698/67739 co-relation queries the response was YES. [2022-12-06 18:09:16,985 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69229 conditions, 7664 events. 2339/7664 cut-off events. For 65698/67739 co-relation queries the response was YES. Maximal size of possible extension queue 572. Compared 83220 event pairs, 9 based on Foata normal form. 290/7229 useless extension candidates. Maximal degree in co-relation 51716. Up to 4955 conditions per place. [2022-12-06 18:09:17,076 INFO L137 encePairwiseOnDemand]: 65/77 looper letters, 638 selfloop transitions, 2595 changer transitions 758/4124 dead transitions. [2022-12-06 18:09:17,077 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 496 places, 4124 transitions, 103976 flow [2022-12-06 18:09:17,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-12-06 18:09:17,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2022-12-06 18:09:17,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 4076 transitions. [2022-12-06 18:09:17,082 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.7562152133580705 [2022-12-06 18:09:17,082 INFO L294 CegarLoopForPetriNet]: 68 programPoint places, 428 predicate places. [2022-12-06 18:09:17,083 INFO L495 AbstractCegarLoop]: Abstraction has has 496 places, 4124 transitions, 103976 flow [2022-12-06 18:09:17,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 57.0) internal successors, (969), 17 states have internal predecessors, (969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-06 18:09:17,083 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-06 18:09:17,083 INFO L213 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-06 18:09:17,108 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-12-06 18:09:17,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-12-06 18:09:17,288 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-06 18:09:17,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-06 18:09:17,289 INFO L85 PathProgramCache]: Analyzing trace with hash 1126382917, now seen corresponding path program 10 times [2022-12-06 18:09:17,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-06 18:09:17,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92832629] [2022-12-06 18:09:17,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-06 18:09:17,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-06 18:09:17,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-06 18:09:17,446 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-06 18:09:17,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-06 18:09:17,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92832629] [2022-12-06 18:09:17,447 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92832629] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-06 18:09:17,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812611937] [2022-12-06 18:09:17,447 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-06 18:09:17,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-06 18:09:17,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-06 18:09:17,449 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) [2022-12-06 18:09:17,451 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-06 18:09:17,498 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-06 18:09:17,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-06 18:09:17,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-06 18:09:17,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-06 18:09:17,604 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-06 18:09:17,604 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-06 18:09:17,759 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-06 18:09:17,759 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [812611937] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-06 18:09:17,759 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-06 18:09:17,759 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 17 [2022-12-06 18:09:17,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992857453] [2022-12-06 18:09:17,760 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-06 18:09:17,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-06 18:09:17,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-06 18:09:17,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-06 18:09:17,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2022-12-06 18:09:17,761 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 77 [2022-12-06 18:09:17,762 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 496 places, 4124 transitions, 103976 flow. Second operand has 17 states, 17 states have (on average 57.05882352941177) internal successors, (970), 17 states have internal predecessors, (970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-06 18:09:17,762 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-06 18:09:17,762 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 77 [2022-12-06 18:09:17,762 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-06 18:09:22,499 INFO L130 PetriNetUnfolder]: 2431/7836 cut-off events. [2022-12-06 18:09:22,500 INFO L131 PetriNetUnfolder]: For 77006/79038 co-relation queries the response was YES. [2022-12-06 18:09:22,516 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76054 conditions, 7836 events. 2431/7836 cut-off events. For 77006/79038 co-relation queries the response was YES. Maximal size of possible extension queue 577. Compared 84679 event pairs, 11 based on Foata normal form. 278/7393 useless extension candidates. Maximal degree in co-relation 51940. Up to 5066 conditions per place. [2022-12-06 18:09:22,602 INFO L137 encePairwiseOnDemand]: 65/77 looper letters, 1091 selfloop transitions, 2261 changer transitions 764/4249 dead transitions. [2022-12-06 18:09:22,602 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 527 places, 4249 transitions, 115338 flow [2022-12-06 18:09:22,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-12-06 18:09:22,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2022-12-06 18:09:22,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 1888 transitions. [2022-12-06 18:09:22,605 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.7662337662337663 [2022-12-06 18:09:22,605 INFO L294 CegarLoopForPetriNet]: 68 programPoint places, 459 predicate places. [2022-12-06 18:09:22,605 INFO L495 AbstractCegarLoop]: Abstraction has has 527 places, 4249 transitions, 115338 flow [2022-12-06 18:09:22,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 57.05882352941177) internal successors, (970), 17 states have internal predecessors, (970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-06 18:09:22,606 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-06 18:09:22,606 INFO L213 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-06 18:09:22,613 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-06 18:09:22,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-12-06 18:09:22,811 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-06 18:09:22,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-06 18:09:22,812 INFO L85 PathProgramCache]: Analyzing trace with hash -565497203, now seen corresponding path program 11 times [2022-12-06 18:09:22,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-06 18:09:22,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678768734] [2022-12-06 18:09:22,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-06 18:09:22,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-06 18:09:22,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-06 18:09:22,975 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-06 18:09:22,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-06 18:09:22,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678768734] [2022-12-06 18:09:22,976 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678768734] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-06 18:09:22,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113184722] [2022-12-06 18:09:22,977 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-06 18:09:22,978 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-06 18:09:22,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-06 18:09:22,989 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) [2022-12-06 18:09:22,990 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-06 18:09:23,106 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-06 18:09:23,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-06 18:09:23,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-06 18:09:23,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-06 18:09:23,235 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-06 18:09:23,235 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-06 18:09:23,431 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-06 18:09:23,431 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1113184722] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-06 18:09:23,431 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-06 18:09:23,431 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 9] total 21 [2022-12-06 18:09:23,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856908763] [2022-12-06 18:09:23,432 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-06 18:09:23,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-06 18:09:23,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-06 18:09:23,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-06 18:09:23,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2022-12-06 18:09:23,433 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 77 [2022-12-06 18:09:23,434 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 527 places, 4249 transitions, 115338 flow. Second operand has 21 states, 21 states have (on average 57.0) internal successors, (1197), 21 states have internal predecessors, (1197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-06 18:09:23,434 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-06 18:09:23,434 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 77 [2022-12-06 18:09:23,434 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-06 18:09:31,510 INFO L130 PetriNetUnfolder]: 3162/10740 cut-off events. [2022-12-06 18:09:31,511 INFO L131 PetriNetUnfolder]: For 121763/124668 co-relation queries the response was YES. [2022-12-06 18:09:31,521 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108996 conditions, 10740 events. 3162/10740 cut-off events. For 121763/124668 co-relation queries the response was YES. Maximal size of possible extension queue 834. Compared 126715 event pairs, 2 based on Foata normal form. 413/10121 useless extension candidates. Maximal degree in co-relation 99272. Up to 6898 conditions per place. [2022-12-06 18:09:31,573 INFO L137 encePairwiseOnDemand]: 64/77 looper letters, 1417 selfloop transitions, 2974 changer transitions 1115/5639 dead transitions. [2022-12-06 18:09:31,573 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 586 places, 5639 transitions, 165242 flow [2022-12-06 18:09:31,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-12-06 18:09:31,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2022-12-06 18:09:31,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 3506 transitions. [2022-12-06 18:09:31,576 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.7588744588744589 [2022-12-06 18:09:31,577 INFO L294 CegarLoopForPetriNet]: 68 programPoint places, 518 predicate places. [2022-12-06 18:09:31,577 INFO L495 AbstractCegarLoop]: Abstraction has has 586 places, 5639 transitions, 165242 flow [2022-12-06 18:09:31,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 57.0) internal successors, (1197), 21 states have internal predecessors, (1197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-06 18:09:31,577 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-06 18:09:31,577 INFO L213 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-06 18:09:31,582 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-12-06 18:09:31,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-12-06 18:09:31,782 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-06 18:09:31,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-06 18:09:31,782 INFO L85 PathProgramCache]: Analyzing trace with hash -1572725859, now seen corresponding path program 12 times [2022-12-06 18:09:31,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-06 18:09:31,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16192766] [2022-12-06 18:09:31,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-06 18:09:31,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-06 18:09:31,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-06 18:09:31,972 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-06 18:09:31,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-06 18:09:31,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16192766] [2022-12-06 18:09:31,972 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16192766] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-06 18:09:31,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645047455] [2022-12-06 18:09:31,972 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-06 18:09:31,972 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-06 18:09:31,972 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-06 18:09:31,973 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) [2022-12-06 18:09:31,976 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-06 18:09:32,025 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-12-06 18:09:32,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-06 18:09:32,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-06 18:09:32,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-06 18:09:32,146 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-06 18:09:32,146 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-06 18:09:32,293 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-06 18:09:32,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [645047455] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-06 18:09:32,293 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-06 18:09:32,293 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 21 [2022-12-06 18:09:32,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246652787] [2022-12-06 18:09:32,294 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-06 18:09:32,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-06 18:09:32,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-06 18:09:32,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-06 18:09:32,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2022-12-06 18:09:32,295 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 77 [2022-12-06 18:09:32,296 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 586 places, 5639 transitions, 165242 flow. Second operand has 21 states, 21 states have (on average 57.19047619047619) internal successors, (1201), 21 states have internal predecessors, (1201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-06 18:09:32,296 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-06 18:09:32,296 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 77 [2022-12-06 18:09:32,296 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-06 18:09:44,900 INFO L130 PetriNetUnfolder]: 3789/13311 cut-off events. [2022-12-06 18:09:44,901 INFO L131 PetriNetUnfolder]: For 168729/172418 co-relation queries the response was YES. [2022-12-06 18:09:44,914 INFO L83 FinitePrefix]: Finished finitePrefix Result has 141477 conditions, 13311 events. 3789/13311 cut-off events. For 168729/172418 co-relation queries the response was YES. Maximal size of possible extension queue 986. Compared 164393 event pairs, 2 based on Foata normal form. 490/12466 useless extension candidates. Maximal degree in co-relation 128150. Up to 8488 conditions per place. [2022-12-06 18:09:44,981 INFO L137 encePairwiseOnDemand]: 64/77 looper letters, 2188 selfloop transitions, 3109 changer transitions 1374/6804 dead transitions. [2022-12-06 18:09:44,981 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 625 places, 6804 transitions, 213525 flow [2022-12-06 18:09:44,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-12-06 18:09:44,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2022-12-06 18:09:44,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 2386 transitions. [2022-12-06 18:09:44,984 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.7746753246753246 [2022-12-06 18:09:44,984 INFO L294 CegarLoopForPetriNet]: 68 programPoint places, 557 predicate places. [2022-12-06 18:09:44,984 INFO L495 AbstractCegarLoop]: Abstraction has has 625 places, 6804 transitions, 213525 flow [2022-12-06 18:09:44,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 57.19047619047619) internal successors, (1201), 21 states have internal predecessors, (1201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-06 18:09:44,984 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-06 18:09:44,985 INFO L213 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-06 18:09:44,995 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-12-06 18:09:45,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-12-06 18:09:45,189 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-06 18:09:45,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-06 18:09:45,189 INFO L85 PathProgramCache]: Analyzing trace with hash 1407355299, now seen corresponding path program 13 times [2022-12-06 18:09:45,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-06 18:09:45,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428891930] [2022-12-06 18:09:45,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-06 18:09:45,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-06 18:09:45,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-06 18:09:45,436 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-06 18:09:45,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-06 18:09:45,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428891930] [2022-12-06 18:09:45,436 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428891930] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-06 18:09:45,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436521819] [2022-12-06 18:09:45,437 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-06 18:09:45,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-06 18:09:45,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-06 18:09:45,438 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) [2022-12-06 18:09:45,467 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-06 18:09:45,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-06 18:09:45,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-06 18:09:45,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-06 18:09:45,634 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-06 18:09:45,634 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-06 18:09:45,808 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-06 18:09:45,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1436521819] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-06 18:09:45,808 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-06 18:09:45,808 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 11] total 20 [2022-12-06 18:09:45,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001954131] [2022-12-06 18:09:45,808 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-06 18:09:45,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-06 18:09:45,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-06 18:09:45,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-06 18:09:45,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2022-12-06 18:09:45,810 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 77 [2022-12-06 18:09:45,810 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 625 places, 6804 transitions, 213525 flow. Second operand has 20 states, 20 states have (on average 47.05) internal successors, (941), 20 states have internal predecessors, (941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-06 18:09:45,810 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-06 18:09:45,810 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 77 [2022-12-06 18:09:45,811 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-06 18:10:08,696 INFO L130 PetriNetUnfolder]: 4871/16559 cut-off events. [2022-12-06 18:10:08,696 INFO L131 PetriNetUnfolder]: For 233412/237733 co-relation queries the response was YES. [2022-12-06 18:10:08,713 INFO L83 FinitePrefix]: Finished finitePrefix Result has 189992 conditions, 16559 events. 4871/16559 cut-off events. For 233412/237733 co-relation queries the response was YES. Maximal size of possible extension queue 1203. Compared 209106 event pairs, 2 based on Foata normal form. 535/15490 useless extension candidates. Maximal degree in co-relation 147102. Up to 10625 conditions per place. [2022-12-06 18:10:08,803 INFO L137 encePairwiseOnDemand]: 60/77 looper letters, 2858 selfloop transitions, 4203 changer transitions 1709/8805 dead transitions. [2022-12-06 18:10:08,803 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 702 places, 8805 transitions, 291735 flow [2022-12-06 18:10:08,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-12-06 18:10:08,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2022-12-06 18:10:08,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 3842 transitions. [2022-12-06 18:10:08,806 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.6315962518494164 [2022-12-06 18:10:08,806 INFO L294 CegarLoopForPetriNet]: 68 programPoint places, 634 predicate places. [2022-12-06 18:10:08,806 INFO L495 AbstractCegarLoop]: Abstraction has has 702 places, 8805 transitions, 291735 flow [2022-12-06 18:10:08,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 47.05) internal successors, (941), 20 states have internal predecessors, (941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-06 18:10:08,807 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-06 18:10:08,807 INFO L213 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-06 18:10:08,815 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-12-06 18:10:09,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-06 18:10:09,011 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-06 18:10:09,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-06 18:10:09,012 INFO L85 PathProgramCache]: Analyzing trace with hash 1404394375, now seen corresponding path program 14 times [2022-12-06 18:10:09,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-06 18:10:09,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265836466] [2022-12-06 18:10:09,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-06 18:10:09,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-06 18:10:09,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-06 18:10:09,189 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-06 18:10:09,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-06 18:10:09,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265836466] [2022-12-06 18:10:09,189 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265836466] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-06 18:10:09,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078059358] [2022-12-06 18:10:09,190 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-06 18:10:09,190 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-06 18:10:09,190 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-06 18:10:09,194 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) [2022-12-06 18:10:09,230 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-06 18:10:09,264 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-06 18:10:09,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-06 18:10:09,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-06 18:10:09,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-06 18:10:09,364 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-06 18:10:09,365 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-06 18:10:09,526 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-06 18:10:09,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1078059358] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-06 18:10:09,527 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-06 18:10:09,527 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 17 [2022-12-06 18:10:09,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471481878] [2022-12-06 18:10:09,527 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-06 18:10:09,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-06 18:10:09,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-06 18:10:09,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-06 18:10:09,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2022-12-06 18:10:09,528 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 77 [2022-12-06 18:10:09,529 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 702 places, 8805 transitions, 291735 flow. Second operand has 17 states, 17 states have (on average 57.05882352941177) internal successors, (970), 17 states have internal predecessors, (970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-06 18:10:09,529 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-06 18:10:09,529 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 77 [2022-12-06 18:10:09,529 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-06 18:10:39,281 INFO L130 PetriNetUnfolder]: 4988/16864 cut-off events. [2022-12-06 18:10:39,281 INFO L131 PetriNetUnfolder]: For 262523/267169 co-relation queries the response was YES. [2022-12-06 18:10:39,299 INFO L83 FinitePrefix]: Finished finitePrefix Result has 204653 conditions, 16864 events. 4988/16864 cut-off events. For 262523/267169 co-relation queries the response was YES. Maximal size of possible extension queue 1220. Compared 213053 event pairs, 2 based on Foata normal form. 502/15761 useless extension candidates. Maximal degree in co-relation 138765. Up to 10841 conditions per place. [2022-12-06 18:10:39,396 INFO L137 encePairwiseOnDemand]: 65/77 looper letters, 2476 selfloop transitions, 4613 changer transitions 1741/9053 dead transitions. [2022-12-06 18:10:39,396 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 748 places, 9053 transitions, 317133 flow [2022-12-06 18:10:39,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-12-06 18:10:39,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2022-12-06 18:10:39,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 2752 transitions. [2022-12-06 18:10:39,399 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.7604310583033987 [2022-12-06 18:10:39,399 INFO L294 CegarLoopForPetriNet]: 68 programPoint places, 680 predicate places. [2022-12-06 18:10:39,399 INFO L495 AbstractCegarLoop]: Abstraction has has 748 places, 9053 transitions, 317133 flow [2022-12-06 18:10:39,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 57.05882352941177) internal successors, (970), 17 states have internal predecessors, (970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-06 18:10:39,399 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-06 18:10:39,400 INFO L213 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-06 18:10:39,405 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-12-06 18:10:39,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-06 18:10:39,604 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-06 18:10:39,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-06 18:10:39,605 INFO L85 PathProgramCache]: Analyzing trace with hash 2040988179, now seen corresponding path program 15 times [2022-12-06 18:10:39,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-06 18:10:39,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196964061] [2022-12-06 18:10:39,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-06 18:10:39,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-06 18:10:39,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-06 18:10:39,754 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-06 18:10:39,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-06 18:10:39,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196964061] [2022-12-06 18:10:39,754 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196964061] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-06 18:10:39,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632480754] [2022-12-06 18:10:39,754 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-06 18:10:39,754 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-06 18:10:39,754 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-06 18:10:39,756 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) [2022-12-06 18:10:39,795 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-12-06 18:10:39,824 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-06 18:10:39,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-06 18:10:39,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-06 18:10:39,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-06 18:10:39,932 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-06 18:10:39,932 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-06 18:10:40,092 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-06 18:10:40,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [632480754] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-06 18:10:40,093 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-06 18:10:40,093 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 17 [2022-12-06 18:10:40,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104717817] [2022-12-06 18:10:40,093 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-06 18:10:40,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-06 18:10:40,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-06 18:10:40,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-06 18:10:40,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2022-12-06 18:10:40,094 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 77 [2022-12-06 18:10:40,095 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 748 places, 9053 transitions, 317133 flow. Second operand has 17 states, 17 states have (on average 57.05882352941177) internal successors, (970), 17 states have internal predecessors, (970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-06 18:10:40,095 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-06 18:10:40,095 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 77 [2022-12-06 18:10:40,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-06 18:11:11,483 INFO L130 PetriNetUnfolder]: 5040/16987 cut-off events. [2022-12-06 18:11:11,483 INFO L131 PetriNetUnfolder]: For 294413/299378 co-relation queries the response was YES. [2022-12-06 18:11:11,502 INFO L83 FinitePrefix]: Finished finitePrefix Result has 217056 conditions, 16987 events. 5040/16987 cut-off events. For 294413/299378 co-relation queries the response was YES. Maximal size of possible extension queue 1236. Compared 214865 event pairs, 2 based on Foata normal form. 556/15930 useless extension candidates. Maximal degree in co-relation 199652. Up to 10942 conditions per place. [2022-12-06 18:11:11,606 INFO L137 encePairwiseOnDemand]: 65/77 looper letters, 1657 selfloop transitions, 5447 changer transitions 1804/9131 dead transitions. [2022-12-06 18:11:11,606 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 806 places, 9131 transitions, 337682 flow [2022-12-06 18:11:11,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-12-06 18:11:11,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2022-12-06 18:11:11,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 3445 transitions. [2022-12-06 18:11:11,611 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.7583094871230465 [2022-12-06 18:11:11,611 INFO L294 CegarLoopForPetriNet]: 68 programPoint places, 738 predicate places. [2022-12-06 18:11:11,611 INFO L495 AbstractCegarLoop]: Abstraction has has 806 places, 9131 transitions, 337682 flow [2022-12-06 18:11:11,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 57.05882352941177) internal successors, (970), 17 states have internal predecessors, (970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-06 18:11:11,612 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-06 18:11:11,612 INFO L213 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-06 18:11:11,617 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-12-06 18:11:11,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-06 18:11:11,817 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-06 18:11:11,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-06 18:11:11,817 INFO L85 PathProgramCache]: Analyzing trace with hash 1997180671, now seen corresponding path program 16 times [2022-12-06 18:11:11,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-06 18:11:11,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618770368] [2022-12-06 18:11:11,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-06 18:11:11,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-06 18:11:11,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-06 18:11:11,941 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-06 18:11:11,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-06 18:11:11,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618770368] [2022-12-06 18:11:11,941 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618770368] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-06 18:11:11,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622772891] [2022-12-06 18:11:11,941 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-06 18:11:11,942 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-06 18:11:11,942 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-06 18:11:11,943 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) [2022-12-06 18:11:11,987 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-12-06 18:11:12,034 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-06 18:11:12,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-06 18:11:12,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-06 18:11:12,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-06 18:11:12,150 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-06 18:11:12,150 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-06 18:11:12,274 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-06 18:11:12,275 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [622772891] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-06 18:11:12,275 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-06 18:11:12,275 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 19 [2022-12-06 18:11:12,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683267519] [2022-12-06 18:11:12,275 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-06 18:11:12,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-06 18:11:12,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-06 18:11:12,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-06 18:11:12,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=258, Unknown=0, NotChecked=0, Total=342 [2022-12-06 18:11:12,276 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 77 [2022-12-06 18:11:12,277 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 806 places, 9131 transitions, 337682 flow. Second operand has 19 states, 19 states have (on average 57.0) internal successors, (1083), 19 states have internal predecessors, (1083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-06 18:11:12,277 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-06 18:11:12,277 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 77 [2022-12-06 18:11:12,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-06 18:11:50,771 INFO L130 PetriNetUnfolder]: 5534/18275 cut-off events. [2022-12-06 18:11:50,771 INFO L131 PetriNetUnfolder]: For 353011/358264 co-relation queries the response was YES. [2022-12-06 18:11:50,819 INFO L83 FinitePrefix]: Finished finitePrefix Result has 246397 conditions, 18275 events. 5534/18275 cut-off events. For 353011/358264 co-relation queries the response was YES. Maximal size of possible extension queue 1333. Compared 231946 event pairs, 2 based on Foata normal form. 542/17122 useless extension candidates. Maximal degree in co-relation 194074. Up to 11782 conditions per place. [2022-12-06 18:11:51,202 INFO L137 encePairwiseOnDemand]: 65/77 looper letters, 3268 selfloop transitions, 4588 changer transitions 1880/9959 dead transitions. [2022-12-06 18:11:51,202 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 824 places, 9959 transitions, 387854 flow [2022-12-06 18:11:51,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-12-06 18:11:51,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2022-12-06 18:11:51,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1127 transitions. [2022-12-06 18:11:51,204 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.7703349282296651 [2022-12-06 18:11:51,205 INFO L294 CegarLoopForPetriNet]: 68 programPoint places, 756 predicate places. [2022-12-06 18:11:51,205 INFO L495 AbstractCegarLoop]: Abstraction has has 824 places, 9959 transitions, 387854 flow [2022-12-06 18:11:51,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 57.0) internal successors, (1083), 19 states have internal predecessors, (1083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-06 18:11:51,205 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-06 18:11:51,205 INFO L213 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-06 18:11:51,231 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-12-06 18:11:51,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-06 18:11:51,407 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-06 18:11:51,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-06 18:11:51,408 INFO L85 PathProgramCache]: Analyzing trace with hash -1693574993, now seen corresponding path program 17 times [2022-12-06 18:11:51,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-06 18:11:51,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565016460] [2022-12-06 18:11:51,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-06 18:11:51,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-06 18:11:51,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-06 18:11:51,985 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-06 18:11:51,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-06 18:11:51,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565016460] [2022-12-06 18:11:51,985 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565016460] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-06 18:11:51,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999159954] [2022-12-06 18:11:51,985 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-06 18:11:51,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-06 18:11:51,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-06 18:11:51,996 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-06 18:11:51,998 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-12-06 18:11:52,116 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-12-06 18:11:52,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-06 18:11:52,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-06 18:11:52,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-06 18:11:52,411 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-06 18:11:52,412 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-06 18:11:52,902 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-06 18:11:52,903 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1999159954] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-06 18:11:52,903 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-06 18:11:52,907 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 9] total 21 [2022-12-06 18:11:52,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28891372] [2022-12-06 18:11:52,907 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-06 18:11:52,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-06 18:11:52,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-06 18:11:52,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-06 18:11:52,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2022-12-06 18:11:52,911 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 77 [2022-12-06 18:11:52,920 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 824 places, 9959 transitions, 387854 flow. Second operand has 21 states, 21 states have (on average 56.904761904761905) internal successors, (1195), 21 states have internal predecessors, (1195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-06 18:11:52,920 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-06 18:11:52,920 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 77 [2022-12-06 18:11:52,920 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-06 18:13:06,191 INFO L130 PetriNetUnfolder]: 6040/20252 cut-off events. [2022-12-06 18:13:06,192 INFO L131 PetriNetUnfolder]: For 429552/436036 co-relation queries the response was YES. [2022-12-06 18:13:06,218 INFO L83 FinitePrefix]: Finished finitePrefix Result has 283974 conditions, 20252 events. 6040/20252 cut-off events. For 429552/436036 co-relation queries the response was YES. Maximal size of possible extension queue 1484. Compared 263342 event pairs, 4 based on Foata normal form. 748/19099 useless extension candidates. Maximal degree in co-relation 196114. Up to 12989 conditions per place. [2022-12-06 18:13:06,359 INFO L137 encePairwiseOnDemand]: 65/77 looper letters, 2379 selfloop transitions, 6213 changer transitions 2122/10937 dead transitions. [2022-12-06 18:13:06,359 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 887 places, 10937 transitions, 447559 flow [2022-12-06 18:13:06,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-12-06 18:13:06,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2022-12-06 18:13:06,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 3738 transitions. [2022-12-06 18:13:06,363 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.7585227272727273 [2022-12-06 18:13:06,364 INFO L294 CegarLoopForPetriNet]: 68 programPoint places, 819 predicate places. [2022-12-06 18:13:06,364 INFO L495 AbstractCegarLoop]: Abstraction has has 887 places, 10937 transitions, 447559 flow [2022-12-06 18:13:06,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 56.904761904761905) internal successors, (1195), 21 states have internal predecessors, (1195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-06 18:13:06,365 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-06 18:13:06,371 INFO L213 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-06 18:13:06,399 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-12-06 18:13:06,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-06 18:13:06,580 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-06 18:13:06,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-06 18:13:06,580 INFO L85 PathProgramCache]: Analyzing trace with hash 140635209, now seen corresponding path program 18 times [2022-12-06 18:13:06,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-06 18:13:06,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437086366] [2022-12-06 18:13:06,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-06 18:13:06,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-06 18:13:06,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-06 18:13:06,829 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-06 18:13:06,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-06 18:13:06,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437086366] [2022-12-06 18:13:06,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437086366] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-06 18:13:06,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505244014] [2022-12-06 18:13:06,829 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-06 18:13:06,829 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-06 18:13:06,829 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-06 18:13:06,832 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-06 18:13:06,886 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-12-06 18:13:06,970 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-12-06 18:13:06,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-06 18:13:06,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-06 18:13:06,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-06 18:13:07,088 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-06 18:13:07,088 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-06 18:13:07,298 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-06 18:13:07,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [505244014] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-06 18:13:07,298 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-06 18:13:07,298 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 19 [2022-12-06 18:13:07,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047246964] [2022-12-06 18:13:07,298 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-06 18:13:07,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-06 18:13:07,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-06 18:13:07,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-06 18:13:07,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2022-12-06 18:13:07,299 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 77 [2022-12-06 18:13:07,300 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 887 places, 10937 transitions, 447559 flow. Second operand has 19 states, 19 states have (on average 57.0) internal successors, (1083), 19 states have internal predecessors, (1083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-06 18:13:07,300 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-06 18:13:07,300 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 77 [2022-12-06 18:13:07,300 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-06 18:14:10,612 INFO L130 PetriNetUnfolder]: 6100/20441 cut-off events. [2022-12-06 18:14:10,612 INFO L131 PetriNetUnfolder]: For 474219/480360 co-relation queries the response was YES. [2022-12-06 18:14:10,636 INFO L83 FinitePrefix]: Finished finitePrefix Result has 299821 conditions, 20441 events. 6100/20441 cut-off events. For 474219/480360 co-relation queries the response was YES. Maximal size of possible extension queue 1503. Compared 266583 event pairs, 4 based on Foata normal form. 574/19101 useless extension candidates. Maximal degree in co-relation 261240. Up to 13146 conditions per place. [2022-12-06 18:14:10,768 INFO L137 encePairwiseOnDemand]: 65/77 looper letters, 2379 selfloop transitions, 6229 changer transitions 2209/11040 dead transitions. [2022-12-06 18:14:10,769 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 938 places, 11040 transitions, 473505 flow [2022-12-06 18:14:10,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-12-06 18:14:10,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2022-12-06 18:14:10,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 3062 transitions. [2022-12-06 18:14:10,771 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.7647352647352648 [2022-12-06 18:14:10,771 INFO L294 CegarLoopForPetriNet]: 68 programPoint places, 870 predicate places. [2022-12-06 18:14:10,771 INFO L495 AbstractCegarLoop]: Abstraction has has 938 places, 11040 transitions, 473505 flow [2022-12-06 18:14:10,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 57.0) internal successors, (1083), 19 states have internal predecessors, (1083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-06 18:14:10,772 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-06 18:14:10,772 INFO L213 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-06 18:14:10,777 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-12-06 18:14:10,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-06 18:14:10,976 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-06 18:14:10,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-06 18:14:10,977 INFO L85 PathProgramCache]: Analyzing trace with hash 836585757, now seen corresponding path program 19 times [2022-12-06 18:14:10,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-06 18:14:10,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124838490] [2022-12-06 18:14:10,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-06 18:14:10,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-06 18:14:10,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-06 18:14:11,109 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-06 18:14:11,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-06 18:14:11,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124838490] [2022-12-06 18:14:11,110 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124838490] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-06 18:14:11,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350432637] [2022-12-06 18:14:11,110 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-06 18:14:11,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-06 18:14:11,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-06 18:14:11,111 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-06 18:14:11,114 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-12-06 18:14:11,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-06 18:14:11,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-06 18:14:11,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-06 18:14:11,288 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-06 18:14:11,289 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-06 18:14:11,452 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-06 18:14:11,452 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [350432637] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-06 18:14:11,452 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-06 18:14:11,452 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 11] total 21 [2022-12-06 18:14:11,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428013623] [2022-12-06 18:14:11,452 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-06 18:14:11,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-06 18:14:11,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-06 18:14:11,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-06 18:14:11,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2022-12-06 18:14:11,454 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 77 [2022-12-06 18:14:11,454 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 938 places, 11040 transitions, 473505 flow. Second operand has 21 states, 21 states have (on average 47.095238095238095) internal successors, (989), 21 states have internal predecessors, (989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-06 18:14:11,454 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-06 18:14:11,454 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 77 [2022-12-06 18:14:11,455 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-06 18:16:13,836 INFO L130 PetriNetUnfolder]: 7867/25381 cut-off events. [2022-12-06 18:16:13,836 INFO L131 PetriNetUnfolder]: For 637749/645490 co-relation queries the response was YES. [2022-12-06 18:16:13,871 INFO L83 FinitePrefix]: Finished finitePrefix Result has 396511 conditions, 25381 events. 7867/25381 cut-off events. For 637749/645490 co-relation queries the response was YES. Maximal size of possible extension queue 1753. Compared 335449 event pairs, 0 based on Foata normal form. 653/23758 useless extension candidates. Maximal degree in co-relation 334226. Up to 16412 conditions per place. [2022-12-06 18:16:14,058 INFO L137 encePairwiseOnDemand]: 60/77 looper letters, 5787 selfloop transitions, 6044 changer transitions 2370/14236 dead transitions. [2022-12-06 18:16:14,058 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1019 places, 14236 transitions, 635198 flow [2022-12-06 18:16:14,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-12-06 18:16:14,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2022-12-06 18:16:14,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 3992 transitions. [2022-12-06 18:16:14,061 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.6322458029775103 [2022-12-06 18:16:14,062 INFO L294 CegarLoopForPetriNet]: 68 programPoint places, 951 predicate places. [2022-12-06 18:16:14,062 INFO L495 AbstractCegarLoop]: Abstraction has has 1019 places, 14236 transitions, 635198 flow [2022-12-06 18:16:14,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 47.095238095238095) internal successors, (989), 21 states have internal predecessors, (989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-06 18:16:14,062 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-06 18:16:14,062 INFO L213 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-06 18:16:14,067 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-12-06 18:16:14,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-12-06 18:16:14,267 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-06 18:16:14,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-06 18:16:14,268 INFO L85 PathProgramCache]: Analyzing trace with hash -1160351739, now seen corresponding path program 20 times [2022-12-06 18:16:14,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-06 18:16:14,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854758159] [2022-12-06 18:16:14,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-06 18:16:14,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-06 18:16:14,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-06 18:16:14,427 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-06 18:16:14,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-06 18:16:14,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854758159] [2022-12-06 18:16:14,428 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854758159] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-06 18:16:14,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229059243] [2022-12-06 18:16:14,428 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-06 18:16:14,428 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-06 18:16:14,428 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-06 18:16:14,429 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-06 18:16:14,431 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-12-06 18:16:14,488 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-06 18:16:14,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-06 18:16:14,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-06 18:16:14,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-06 18:16:14,603 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-06 18:16:14,603 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-06 18:16:14,859 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-06 18:16:14,860 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1229059243] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-06 18:16:14,860 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-06 18:16:14,860 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-12-06 18:16:14,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487170088] [2022-12-06 18:16:14,860 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-06 18:16:14,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-06 18:16:14,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-06 18:16:14,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-06 18:16:14,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=324, Unknown=0, NotChecked=0, Total=420 [2022-12-06 18:16:14,863 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 77 [2022-12-06 18:16:14,864 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1019 places, 14236 transitions, 635198 flow. Second operand has 21 states, 21 states have (on average 57.142857142857146) internal successors, (1200), 21 states have internal predecessors, (1200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-06 18:16:14,864 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-06 18:16:14,864 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 77 [2022-12-06 18:16:14,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-06 18:18:51,316 INFO L130 PetriNetUnfolder]: 8598/27620 cut-off events. [2022-12-06 18:18:51,316 INFO L131 PetriNetUnfolder]: For 750881/759155 co-relation queries the response was YES. [2022-12-06 18:18:51,368 INFO L83 FinitePrefix]: Finished finitePrefix Result has 449491 conditions, 27620 events. 8598/27620 cut-off events. For 750881/759155 co-relation queries the response was YES. Maximal size of possible extension queue 1874. Compared 368417 event pairs, 2 based on Foata normal form. 744/25891 useless extension candidates. Maximal degree in co-relation 356688. Up to 17808 conditions per place. [2022-12-06 18:18:51,618 INFO L137 encePairwiseOnDemand]: 64/77 looper letters, 6320 selfloop transitions, 6266 changer transitions 2567/15528 dead transitions. [2022-12-06 18:18:51,618 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1053 places, 15528 transitions, 723721 flow [2022-12-06 18:18:51,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-12-06 18:18:51,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2022-12-06 18:18:51,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 2083 transitions. [2022-12-06 18:18:51,620 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.77291280148423 [2022-12-06 18:18:51,622 INFO L294 CegarLoopForPetriNet]: 68 programPoint places, 985 predicate places. [2022-12-06 18:18:51,622 INFO L495 AbstractCegarLoop]: Abstraction has has 1053 places, 15528 transitions, 723721 flow [2022-12-06 18:18:51,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 57.142857142857146) internal successors, (1200), 21 states have internal predecessors, (1200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-06 18:18:51,622 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-06 18:18:51,622 INFO L213 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-06 18:18:51,630 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-12-06 18:18:51,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-12-06 18:18:51,823 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-06 18:18:51,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-06 18:18:51,824 INFO L85 PathProgramCache]: Analyzing trace with hash 739088187, now seen corresponding path program 21 times [2022-12-06 18:18:51,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-06 18:18:51,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561642847] [2022-12-06 18:18:51,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-06 18:18:51,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-06 18:18:51,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-06 18:18:51,965 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-06 18:18:51,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-06 18:18:51,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561642847] [2022-12-06 18:18:51,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561642847] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-06 18:18:51,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616046660] [2022-12-06 18:18:51,965 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-06 18:18:51,965 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-06 18:18:51,965 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-06 18:18:51,968 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-06 18:18:52,008 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-12-06 18:18:52,042 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-06 18:18:52,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-06 18:18:52,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-06 18:18:52,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-06 18:18:52,142 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-06 18:18:52,142 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-06 18:18:52,337 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-06 18:18:52,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1616046660] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-06 18:18:52,338 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-06 18:18:52,338 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 19 [2022-12-06 18:18:52,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280384619] [2022-12-06 18:18:52,338 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-06 18:18:52,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-06 18:18:52,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-06 18:18:52,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-06 18:18:52,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2022-12-06 18:18:52,339 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 77 [2022-12-06 18:18:52,340 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1053 places, 15528 transitions, 723721 flow. Second operand has 19 states, 19 states have (on average 56.94736842105263) internal successors, (1082), 19 states have internal predecessors, (1082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-06 18:18:52,340 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-06 18:18:52,340 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 77 [2022-12-06 18:18:52,340 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-06 18:21:43,728 INFO L130 PetriNetUnfolder]: 8640/27847 cut-off events. [2022-12-06 18:21:43,728 INFO L131 PetriNetUnfolder]: For 820184/828676 co-relation queries the response was YES. [2022-12-06 18:21:43,796 INFO L83 FinitePrefix]: Finished finitePrefix Result has 470672 conditions, 27847 events. 8640/27847 cut-off events. For 820184/828676 co-relation queries the response was YES. Maximal size of possible extension queue 1886. Compared 372809 event pairs, 3 based on Foata normal form. 688/26038 useless extension candidates. Maximal degree in co-relation 335889. Up to 17948 conditions per place. [2022-12-06 18:21:44,070 INFO L137 encePairwiseOnDemand]: 65/77 looper letters, 5532 selfloop transitions, 7108 changer transitions 2624/15639 dead transitions. [2022-12-06 18:21:44,070 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1093 places, 15639 transitions, 759290 flow [2022-12-06 18:21:44,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-12-06 18:21:44,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2022-12-06 18:21:44,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 2408 transitions. [2022-12-06 18:21:44,093 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.7627494456762749 [2022-12-06 18:21:44,093 INFO L294 CegarLoopForPetriNet]: 68 programPoint places, 1025 predicate places. [2022-12-06 18:21:44,093 INFO L495 AbstractCegarLoop]: Abstraction has has 1093 places, 15639 transitions, 759290 flow [2022-12-06 18:21:44,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 56.94736842105263) internal successors, (1082), 19 states have internal predecessors, (1082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-06 18:21:44,094 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-06 18:21:44,094 INFO L213 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-06 18:21:44,127 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-12-06 18:21:44,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-06 18:21:44,304 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-06 18:21:44,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-06 18:21:44,304 INFO L85 PathProgramCache]: Analyzing trace with hash 1060308107, now seen corresponding path program 22 times [2022-12-06 18:21:44,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-06 18:21:44,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516359352] [2022-12-06 18:21:44,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-06 18:21:44,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-06 18:21:44,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-06 18:21:44,639 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-06 18:21:44,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-06 18:21:44,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516359352] [2022-12-06 18:21:44,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516359352] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-06 18:21:44,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978999380] [2022-12-06 18:21:44,640 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-06 18:21:44,640 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-06 18:21:44,640 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-06 18:21:44,652 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-06 18:21:44,686 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-12-06 18:21:44,753 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-06 18:21:44,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-06 18:21:44,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-06 18:21:44,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-06 18:21:44,976 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-06 18:21:44,976 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-06 18:21:45,400 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-06 18:21:45,400 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1978999380] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-06 18:21:45,400 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-06 18:21:45,400 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 20 [2022-12-06 18:21:45,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520652225] [2022-12-06 18:21:45,400 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-06 18:21:45,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-06 18:21:45,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-06 18:21:45,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-06 18:21:45,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2022-12-06 18:21:45,402 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 77 [2022-12-06 18:21:45,402 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1093 places, 15639 transitions, 759290 flow. Second operand has 20 states, 20 states have (on average 56.95) internal successors, (1139), 20 states have internal predecessors, (1139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-06 18:21:45,403 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-06 18:21:45,403 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 77 [2022-12-06 18:21:45,403 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-06 18:24:05,306 INFO L130 PetriNetUnfolder]: 8648/27916 cut-off events. [2022-12-06 18:24:05,306 INFO L131 PetriNetUnfolder]: For 889901/898831 co-relation queries the response was YES. [2022-12-06 18:24:05,348 INFO L83 FinitePrefix]: Finished finitePrefix Result has 489249 conditions, 27916 events. 8648/27916 cut-off events. For 889901/898831 co-relation queries the response was YES. Maximal size of possible extension queue 1891. Compared 374221 event pairs, 4 based on Foata normal form. 693/26111 useless extension candidates. Maximal degree in co-relation 348907. Up to 17988 conditions per place. [2022-12-06 18:24:05,565 INFO L137 encePairwiseOnDemand]: 65/77 looper letters, 4176 selfloop transitions, 8426 changer transitions 2674/15651 dead transitions. [2022-12-06 18:24:05,566 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1143 places, 15651 transitions, 790400 flow [2022-12-06 18:24:05,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-12-06 18:24:05,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2022-12-06 18:24:05,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 2987 transitions. [2022-12-06 18:24:05,569 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.7606315253374077 [2022-12-06 18:24:05,569 INFO L294 CegarLoopForPetriNet]: 68 programPoint places, 1075 predicate places. [2022-12-06 18:24:05,569 INFO L495 AbstractCegarLoop]: Abstraction has has 1143 places, 15651 transitions, 790400 flow [2022-12-06 18:24:05,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 56.95) internal successors, (1139), 20 states have internal predecessors, (1139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-06 18:24:05,570 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-06 18:24:05,570 INFO L213 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-06 18:24:05,575 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-12-06 18:24:05,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-06 18:24:05,775 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-06 18:24:05,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-06 18:24:05,775 INFO L85 PathProgramCache]: Analyzing trace with hash 1423605675, now seen corresponding path program 23 times [2022-12-06 18:24:05,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-06 18:24:05,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136180105] [2022-12-06 18:24:05,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-06 18:24:05,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-06 18:24:05,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-06 18:24:05,908 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-06 18:24:05,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-06 18:24:05,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136180105] [2022-12-06 18:24:05,909 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136180105] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-06 18:24:05,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374076387] [2022-12-06 18:24:05,909 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-06 18:24:05,909 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-06 18:24:05,909 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-06 18:24:05,910 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-06 18:24:05,912 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-12-06 18:24:05,971 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-06 18:24:05,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-06 18:24:05,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-06 18:24:05,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-06 18:24:06,071 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-06 18:24:06,071 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-06 18:24:06,288 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-06 18:24:06,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1374076387] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-06 18:24:06,288 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-06 18:24:06,288 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 19 [2022-12-06 18:24:06,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880639014] [2022-12-06 18:24:06,289 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-06 18:24:06,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-06 18:24:06,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-06 18:24:06,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-06 18:24:06,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2022-12-06 18:24:06,290 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 77 [2022-12-06 18:24:06,291 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1143 places, 15651 transitions, 790400 flow. Second operand has 19 states, 19 states have (on average 56.94736842105263) internal successors, (1082), 19 states have internal predecessors, (1082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-06 18:24:06,291 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-06 18:24:06,291 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 77 [2022-12-06 18:24:06,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand