/usr/lib/jvm/java-1.11.0-openjdk-amd64/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-SemanticLbe.epf --rcfgbuilder.only.consider.context.switches.at.boundaries.of.atomic.blocks true -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/pthread-complex/workstealqueue_mutex-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-wip.dk.datarace-free-lbe-02cf818-m [2023-11-17 11:31:19,110 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-17 11:31:19,179 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf [2023-11-17 11:31:19,211 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-17 11:31:19,212 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-17 11:31:19,212 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-17 11:31:19,213 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-17 11:31:19,213 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-17 11:31:19,214 INFO L153 SettingsManager]: * Use SBE=true [2023-11-17 11:31:19,217 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-17 11:31:19,217 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-17 11:31:19,218 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-17 11:31:19,218 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-17 11:31:19,219 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-17 11:31:19,219 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-17 11:31:19,219 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-17 11:31:19,219 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-17 11:31:19,219 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-17 11:31:19,220 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-17 11:31:19,220 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-17 11:31:19,220 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-17 11:31:19,221 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-17 11:31:19,221 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-17 11:31:19,221 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-11-17 11:31:19,221 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-17 11:31:19,221 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 11:31:19,221 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-17 11:31:19,222 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-17 11:31:19,222 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-17 11:31:19,222 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-17 11:31:19,223 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-17 11:31:19,223 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-17 11:31:19,223 INFO L153 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Only consider context switches at boundaries of atomic blocks -> true [2023-11-17 11:31:19,431 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-17 11:31:19,458 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-17 11:31:19,460 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-17 11:31:19,461 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-17 11:31:19,461 INFO L274 PluginConnector]: CDTParser initialized [2023-11-17 11:31:19,462 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-complex/workstealqueue_mutex-2.i [2023-11-17 11:31:20,522 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-17 11:31:20,790 INFO L384 CDTParser]: Found 1 translation units. [2023-11-17 11:31:20,791 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-complex/workstealqueue_mutex-2.i [2023-11-17 11:31:20,810 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/40c8281e9/1aedfde15f9a43148ed349eb72ab1863/FLAG90c676373 [2023-11-17 11:31:20,824 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/40c8281e9/1aedfde15f9a43148ed349eb72ab1863 [2023-11-17 11:31:20,827 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-17 11:31:20,828 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-11-17 11:31:20,830 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-17 11:31:20,830 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-17 11:31:20,833 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-17 11:31:20,834 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 11:31:20" (1/1) ... [2023-11-17 11:31:20,835 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@e83b404 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:31:20, skipping insertion in model container [2023-11-17 11:31:20,835 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 11:31:20" (1/1) ... [2023-11-17 11:31:20,888 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-17 11:31:21,322 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-complex/workstealqueue_mutex-2.i[76469,76482] [2023-11-17 11:31:21,360 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-complex/workstealqueue_mutex-2.i[79042,79055] [2023-11-17 11:31:21,363 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-complex/workstealqueue_mutex-2.i[79451,79464] [2023-11-17 11:31:21,382 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 11:31:21,398 INFO L202 MainTranslator]: Completed pre-run [2023-11-17 11:31:21,442 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-complex/workstealqueue_mutex-2.i[76469,76482] [2023-11-17 11:31:21,452 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-complex/workstealqueue_mutex-2.i[79042,79055] [2023-11-17 11:31:21,455 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-complex/workstealqueue_mutex-2.i[79451,79464] [2023-11-17 11:31:21,468 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 11:31:21,569 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-17 11:31:21,569 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-17 11:31:21,575 INFO L206 MainTranslator]: Completed translation [2023-11-17 11:31:21,575 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:31:21 WrapperNode [2023-11-17 11:31:21,575 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-17 11:31:21,576 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-17 11:31:21,577 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-17 11:31:21,577 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-17 11:31:21,582 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:31:21" (1/1) ... [2023-11-17 11:31:21,616 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:31:21" (1/1) ... [2023-11-17 11:31:21,686 INFO L138 Inliner]: procedures = 490, calls = 130, calls flagged for inlining = 45, calls inlined = 117, statements flattened = 1858 [2023-11-17 11:31:21,686 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-17 11:31:21,687 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-17 11:31:21,687 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-17 11:31:21,687 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-17 11:31:21,696 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:31:21" (1/1) ... [2023-11-17 11:31:21,696 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:31:21" (1/1) ... [2023-11-17 11:31:21,706 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:31:21" (1/1) ... [2023-11-17 11:31:21,707 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:31:21" (1/1) ... [2023-11-17 11:31:21,742 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:31:21" (1/1) ... [2023-11-17 11:31:21,765 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:31:21" (1/1) ... [2023-11-17 11:31:21,772 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:31:21" (1/1) ... [2023-11-17 11:31:21,777 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:31:21" (1/1) ... [2023-11-17 11:31:21,814 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-17 11:31:21,815 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-17 11:31:21,815 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-17 11:31:21,815 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-17 11:31:21,816 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:31:21" (1/1) ... [2023-11-17 11:31:21,820 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 11:31:21,828 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:31:21,858 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-17 11:31:21,868 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-17 11:31:21,890 INFO L130 BoogieDeclarations]: Found specification of procedure Stealer [2023-11-17 11:31:21,890 INFO L138 BoogieDeclarations]: Found implementation of procedure Stealer [2023-11-17 11:31:21,890 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-17 11:31:21,891 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-17 11:31:21,891 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-17 11:31:21,891 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-17 11:31:21,891 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-17 11:31:21,891 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-17 11:31:21,891 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-17 11:31:21,891 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-17 11:31:21,891 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-17 11:31:21,891 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-17 11:31:21,892 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-17 11:31:21,893 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2023-11-17 11:31:21,893 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-17 11:31:21,893 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-17 11:31:21,895 WARN L211 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-17 11:31:22,147 INFO L239 CfgBuilder]: Building ICFG [2023-11-17 11:31:22,149 INFO L265 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-17 11:31:23,519 INFO L280 CfgBuilder]: Performing block encoding [2023-11-17 11:31:24,509 INFO L302 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-17 11:31:24,509 INFO L307 CfgBuilder]: Removed 11 assume(true) statements. [2023-11-17 11:31:24,510 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 11:31:24 BoogieIcfgContainer [2023-11-17 11:31:24,510 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-17 11:31:24,512 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-17 11:31:24,512 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-17 11:31:24,514 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-17 11:31:24,514 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 11:31:20" (1/3) ... [2023-11-17 11:31:24,515 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@797a9c4e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 11:31:24, skipping insertion in model container [2023-11-17 11:31:24,515 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:31:21" (2/3) ... [2023-11-17 11:31:24,515 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@797a9c4e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 11:31:24, skipping insertion in model container [2023-11-17 11:31:24,515 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 11:31:24" (3/3) ... [2023-11-17 11:31:24,516 INFO L112 eAbstractionObserver]: Analyzing ICFG workstealqueue_mutex-2.i [2023-11-17 11:31:24,529 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-17 11:31:24,529 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2023-11-17 11:31:24,529 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-17 11:31:24,601 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-11-17 11:31:24,625 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 181 places, 204 transitions, 415 flow [2023-11-17 11:31:24,699 INFO L124 PetriNetUnfolderBase]: 48/379 cut-off events. [2023-11-17 11:31:24,699 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-17 11:31:24,704 INFO L83 FinitePrefix]: Finished finitePrefix Result has 384 conditions, 379 events. 48/379 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1727 event pairs, 0 based on Foata normal form. 0/318 useless extension candidates. Maximal degree in co-relation 193. Up to 4 conditions per place. [2023-11-17 11:31:24,704 INFO L82 GeneralOperation]: Start removeDead. Operand has 181 places, 204 transitions, 415 flow [2023-11-17 11:31:24,708 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 181 places, 204 transitions, 415 flow [2023-11-17 11:31:24,710 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 11:31:24,718 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 181 places, 204 transitions, 415 flow [2023-11-17 11:31:24,720 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 181 places, 204 transitions, 415 flow [2023-11-17 11:31:24,720 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 181 places, 204 transitions, 415 flow [2023-11-17 11:31:24,811 INFO L124 PetriNetUnfolderBase]: 48/379 cut-off events. [2023-11-17 11:31:24,811 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-17 11:31:24,813 INFO L83 FinitePrefix]: Finished finitePrefix Result has 384 conditions, 379 events. 48/379 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1727 event pairs, 0 based on Foata normal form. 0/318 useless extension candidates. Maximal degree in co-relation 193. Up to 4 conditions per place. [2023-11-17 11:31:24,816 INFO L119 LiptonReduction]: Number of co-enabled transitions 6018 [2023-11-17 11:35:39,021 WARN L293 SmtUtils]: Spent 11.36s on a formula simplification. DAG size of input: 218 DAG size of output: 210 (called from [L 279] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-11-17 11:35:53,100 WARN L293 SmtUtils]: Spent 9.84s on a formula simplification. DAG size of input: 218 DAG size of output: 210 (called from [L 279] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-11-17 11:35:58,790 INFO L134 LiptonReduction]: Checked pairs total: 135310 [2023-11-17 11:35:58,791 INFO L136 LiptonReduction]: Total number of compositions: 94 [2023-11-17 11:35:58,809 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 11:35:58,812 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=LoopHeads, 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;@31c46fe3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 11:35:58,812 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-11-17 11:35:58,817 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 11:35:58,817 INFO L124 PetriNetUnfolderBase]: 4/28 cut-off events. [2023-11-17 11:35:58,817 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 11:35:58,818 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:35:58,818 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2023-11-17 11:35:58,818 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-17 11:35:58,823 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:35:58,823 INFO L85 PathProgramCache]: Analyzing trace with hash 907270102, now seen corresponding path program 1 times [2023-11-17 11:35:58,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:35:58,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361450492] [2023-11-17 11:35:58,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:35:58,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:35:58,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:35:59,182 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 11:35:59,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:35:59,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361450492] [2023-11-17 11:35:59,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361450492] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:35:59,184 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:35:59,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 11:35:59,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126212319] [2023-11-17 11:35:59,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:35:59,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 11:35:59,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:35:59,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 11:35:59,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 11:35:59,212 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 298 [2023-11-17 11:35:59,213 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 165 transitions, 337 flow. Second operand has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:35:59,213 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:35:59,214 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 298 [2023-11-17 11:35:59,215 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:36:03,540 INFO L124 PetriNetUnfolderBase]: 3964/7336 cut-off events. [2023-11-17 11:36:03,540 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-17 11:36:03,547 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14608 conditions, 7336 events. 3964/7336 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 40502 event pairs, 1534 based on Foata normal form. 0/6311 useless extension candidates. Maximal degree in co-relation 14558. Up to 3669 conditions per place. [2023-11-17 11:36:03,569 INFO L140 encePairwiseOnDemand]: 281/298 looper letters, 293 selfloop transitions, 14 changer transitions 2/312 dead transitions. [2023-11-17 11:36:03,569 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 312 transitions, 1249 flow [2023-11-17 11:36:03,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 11:36:03,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 11:36:03,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 343 transitions. [2023-11-17 11:36:03,583 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.383668903803132 [2023-11-17 11:36:03,583 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 343 transitions. [2023-11-17 11:36:03,584 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 343 transitions. [2023-11-17 11:36:03,586 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:36:03,588 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 343 transitions. [2023-11-17 11:36:03,592 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 114.33333333333333) internal successors, (343), 3 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:36:03,596 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 298.0) internal successors, (1192), 4 states have internal predecessors, (1192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:36:03,597 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 298.0) internal successors, (1192), 4 states have internal predecessors, (1192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:36:03,598 INFO L175 Difference]: Start difference. First operand has 145 places, 165 transitions, 337 flow. Second operand 3 states and 343 transitions. [2023-11-17 11:36:03,599 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 312 transitions, 1249 flow [2023-11-17 11:36:03,604 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 312 transitions, 1249 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-17 11:36:03,609 INFO L231 Difference]: Finished difference. Result has 148 places, 168 transitions, 397 flow [2023-11-17 11:36:03,610 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=298, PETRI_DIFFERENCE_MINUEND_FLOW=333, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=397, PETRI_PLACES=148, PETRI_TRANSITIONS=168} [2023-11-17 11:36:03,615 INFO L281 CegarLoopForPetriNet]: 145 programPoint places, 3 predicate places. [2023-11-17 11:36:03,615 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 168 transitions, 397 flow [2023-11-17 11:36:03,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:36:03,615 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:36:03,615 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-11-17 11:36:03,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-17 11:36:03,617 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-17 11:36:03,623 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:36:03,623 INFO L85 PathProgramCache]: Analyzing trace with hash 569813106, now seen corresponding path program 1 times [2023-11-17 11:36:03,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:36:03,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380478316] [2023-11-17 11:36:03,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:36:03,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:36:03,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:36:03,843 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 11:36:03,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:36:03,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380478316] [2023-11-17 11:36:03,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380478316] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:36:03,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718201784] [2023-11-17 11:36:03,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:36:03,845 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:36:03,845 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:36:03,847 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 11:36:03,850 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-17 11:36:04,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:36:04,031 INFO L262 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-17 11:36:04,035 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:36:04,141 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 11:36:04,141 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:36:04,279 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 11:36:04,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1718201784] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:36:04,279 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:36:04,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-17 11:36:04,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660686964] [2023-11-17 11:36:04,280 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:36:04,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-17 11:36:04,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:36:04,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-17 11:36:04,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-17 11:36:04,290 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 298 [2023-11-17 11:36:04,291 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 168 transitions, 397 flow. Second operand has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:36:04,291 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:36:04,291 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 298 [2023-11-17 11:36:04,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:36:04,906 INFO L124 PetriNetUnfolderBase]: 33/96 cut-off events. [2023-11-17 11:36:04,907 INFO L125 PetriNetUnfolderBase]: For 13/13 co-relation queries the response was YES. [2023-11-17 11:36:04,907 INFO L83 FinitePrefix]: Finished finitePrefix Result has 221 conditions, 96 events. 33/96 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 242 event pairs, 0 based on Foata normal form. 17/107 useless extension candidates. Maximal degree in co-relation 174. Up to 59 conditions per place. [2023-11-17 11:36:04,908 INFO L140 encePairwiseOnDemand]: 293/298 looper letters, 34 selfloop transitions, 7 changer transitions 0/42 dead transitions. [2023-11-17 11:36:04,908 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 42 transitions, 190 flow [2023-11-17 11:36:04,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-17 11:36:04,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-17 11:36:04,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 93 transitions. [2023-11-17 11:36:04,910 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.05201342281879195 [2023-11-17 11:36:04,910 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 93 transitions. [2023-11-17 11:36:04,910 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 93 transitions. [2023-11-17 11:36:04,911 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:36:04,911 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 93 transitions. [2023-11-17 11:36:04,911 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:36:04,913 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 298.0) internal successors, (2086), 7 states have internal predecessors, (2086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:36:04,914 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 298.0) internal successors, (2086), 7 states have internal predecessors, (2086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:36:04,914 INFO L175 Difference]: Start difference. First operand has 148 places, 168 transitions, 397 flow. Second operand 6 states and 93 transitions. [2023-11-17 11:36:04,914 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 42 transitions, 190 flow [2023-11-17 11:36:04,915 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 42 transitions, 186 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-17 11:36:04,915 INFO L231 Difference]: Finished difference. Result has 29 places, 26 transitions, 88 flow [2023-11-17 11:36:04,915 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=298, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=88, PETRI_PLACES=29, PETRI_TRANSITIONS=26} [2023-11-17 11:36:04,918 INFO L281 CegarLoopForPetriNet]: 145 programPoint places, -116 predicate places. [2023-11-17 11:36:04,918 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 26 transitions, 88 flow [2023-11-17 11:36:04,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:36:04,918 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:36:04,919 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1] [2023-11-17 11:36:04,934 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-17 11:36:05,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:36:05,134 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-17 11:36:05,135 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:36:05,135 INFO L85 PathProgramCache]: Analyzing trace with hash -2137973034, now seen corresponding path program 2 times [2023-11-17 11:36:05,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:36:05,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94368316] [2023-11-17 11:36:05,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:36:05,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:36:05,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:36:05,189 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 11:36:05,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:36:05,240 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 11:36:05,241 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 11:36:05,241 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2023-11-17 11:36:05,243 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2023-11-17 11:36:05,243 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2023-11-17 11:36:05,243 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2023-11-17 11:36:05,243 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2023-11-17 11:36:05,244 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2023-11-17 11:36:05,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-17 11:36:05,244 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1] [2023-11-17 11:36:05,246 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 11:36:05,246 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-17 11:36:05,309 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-17 11:36:05,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 199 places, 223 transitions, 462 flow [2023-11-17 11:36:05,383 INFO L124 PetriNetUnfolderBase]: 76/587 cut-off events. [2023-11-17 11:36:05,384 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-17 11:36:05,387 INFO L83 FinitePrefix]: Finished finitePrefix Result has 599 conditions, 587 events. 76/587 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 3262 event pairs, 0 based on Foata normal form. 0/491 useless extension candidates. Maximal degree in co-relation 381. Up to 8 conditions per place. [2023-11-17 11:36:05,387 INFO L82 GeneralOperation]: Start removeDead. Operand has 199 places, 223 transitions, 462 flow [2023-11-17 11:36:05,389 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 199 places, 223 transitions, 462 flow [2023-11-17 11:36:05,389 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 11:36:05,389 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 199 places, 223 transitions, 462 flow [2023-11-17 11:36:05,389 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 199 places, 223 transitions, 462 flow [2023-11-17 11:36:05,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 199 places, 223 transitions, 462 flow [2023-11-17 11:36:05,446 INFO L124 PetriNetUnfolderBase]: 76/587 cut-off events. [2023-11-17 11:36:05,446 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-17 11:36:05,448 INFO L83 FinitePrefix]: Finished finitePrefix Result has 599 conditions, 587 events. 76/587 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 3262 event pairs, 0 based on Foata normal form. 0/491 useless extension candidates. Maximal degree in co-relation 381. Up to 8 conditions per place. [2023-11-17 11:36:05,454 INFO L119 LiptonReduction]: Number of co-enabled transitions 12784 [2023-11-17 11:37:25,926 WARN L293 SmtUtils]: Spent 10.82s on a formula simplification. DAG size of input: 218 DAG size of output: 210 (called from [L 279] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-11-17 11:37:42,528 WARN L293 SmtUtils]: Spent 11.85s on a formula simplification. DAG size of input: 218 DAG size of output: 210 (called from [L 279] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-11-17 11:37:49,254 INFO L134 LiptonReduction]: Checked pairs total: 303544 [2023-11-17 11:37:49,255 INFO L136 LiptonReduction]: Total number of compositions: 111 [2023-11-17 11:37:49,256 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 11:37:49,257 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=LoopHeads, 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;@31c46fe3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 11:37:49,257 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-11-17 11:37:49,261 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 11:37:49,261 INFO L124 PetriNetUnfolderBase]: 5/35 cut-off events. [2023-11-17 11:37:49,261 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-17 11:37:49,261 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:37:49,261 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:37:49,261 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-17 11:37:49,262 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:37:49,262 INFO L85 PathProgramCache]: Analyzing trace with hash 1907296236, now seen corresponding path program 1 times [2023-11-17 11:37:49,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:37:49,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670857021] [2023-11-17 11:37:49,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:37:49,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:37:49,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:37:49,348 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:37:49,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:37:49,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670857021] [2023-11-17 11:37:49,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670857021] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:37:49,348 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:37:49,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 11:37:49,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533261034] [2023-11-17 11:37:49,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:37:49,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 11:37:49,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:37:49,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 11:37:49,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 11:37:49,350 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 334 [2023-11-17 11:37:49,350 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 189 transitions, 394 flow. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:37:49,350 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:37:49,350 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 334 [2023-11-17 11:37:49,350 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:38:15,209 INFO L124 PetriNetUnfolderBase]: 120747/176582 cut-off events. [2023-11-17 11:38:15,210 INFO L125 PetriNetUnfolderBase]: For 62/62 co-relation queries the response was YES. [2023-11-17 11:38:15,432 INFO L83 FinitePrefix]: Finished finitePrefix Result has 352332 conditions, 176582 events. 120747/176582 cut-off events. For 62/62 co-relation queries the response was YES. Maximal size of possible extension queue 1470. Compared 1175476 event pairs, 49517 based on Foata normal form. 0/152954 useless extension candidates. Maximal degree in co-relation 331935. Up to 88810 conditions per place. [2023-11-17 11:38:15,982 INFO L140 encePairwiseOnDemand]: 315/334 looper letters, 340 selfloop transitions, 14 changer transitions 1/358 dead transitions. [2023-11-17 11:38:15,982 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 358 transitions, 1448 flow [2023-11-17 11:38:15,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 11:38:15,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 11:38:15,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 393 transitions. [2023-11-17 11:38:15,983 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39221556886227543 [2023-11-17 11:38:15,983 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 393 transitions. [2023-11-17 11:38:15,984 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 393 transitions. [2023-11-17 11:38:15,984 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:38:15,984 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 393 transitions. [2023-11-17 11:38:15,985 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 131.0) internal successors, (393), 3 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:38:15,986 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 334.0) internal successors, (1336), 4 states have internal predecessors, (1336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:38:15,987 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 334.0) internal successors, (1336), 4 states have internal predecessors, (1336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:38:15,987 INFO L175 Difference]: Start difference. First operand has 166 places, 189 transitions, 394 flow. Second operand 3 states and 393 transitions. [2023-11-17 11:38:15,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 358 transitions, 1448 flow [2023-11-17 11:38:15,989 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 358 transitions, 1448 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-17 11:38:15,991 INFO L231 Difference]: Finished difference. Result has 169 places, 192 transitions, 458 flow [2023-11-17 11:38:15,992 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=334, PETRI_DIFFERENCE_MINUEND_FLOW=386, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=458, PETRI_PLACES=169, PETRI_TRANSITIONS=192} [2023-11-17 11:38:15,992 INFO L281 CegarLoopForPetriNet]: 166 programPoint places, 3 predicate places. [2023-11-17 11:38:15,992 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 192 transitions, 458 flow [2023-11-17 11:38:15,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:38:15,993 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:38:15,993 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1] [2023-11-17 11:38:15,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-17 11:38:15,993 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-17 11:38:15,993 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:38:15,993 INFO L85 PathProgramCache]: Analyzing trace with hash 1994782342, now seen corresponding path program 1 times [2023-11-17 11:38:15,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:38:15,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145040869] [2023-11-17 11:38:15,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:38:15,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:38:16,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:38:16,184 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-17 11:38:16,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:38:16,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145040869] [2023-11-17 11:38:16,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145040869] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:38:16,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547537654] [2023-11-17 11:38:16,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:38:16,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:38:16,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:38:16,189 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 11:38:16,201 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-17 11:38:16,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:38:16,393 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-17 11:38:16,394 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:38:16,473 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-17 11:38:16,473 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:38:16,608 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-17 11:38:16,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [547537654] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:38:16,608 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:38:16,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-17 11:38:16,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905545587] [2023-11-17 11:38:16,608 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:38:16,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-17 11:38:16,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:38:16,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-17 11:38:16,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-17 11:38:16,610 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 334 [2023-11-17 11:38:16,610 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 192 transitions, 458 flow. Second operand has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:38:16,610 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:38:16,610 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 334 [2023-11-17 11:38:16,610 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:38:41,731 INFO L124 PetriNetUnfolderBase]: 117139/169610 cut-off events. [2023-11-17 11:38:41,731 INFO L125 PetriNetUnfolderBase]: For 825/825 co-relation queries the response was YES. [2023-11-17 11:38:41,961 INFO L83 FinitePrefix]: Finished finitePrefix Result has 341898 conditions, 169610 events. 117139/169610 cut-off events. For 825/825 co-relation queries the response was YES. Maximal size of possible extension queue 887. Compared 1053904 event pairs, 47547 based on Foata normal form. 467/148173 useless extension candidates. Maximal degree in co-relation 315306. Up to 83541 conditions per place. [2023-11-17 11:38:42,411 INFO L140 encePairwiseOnDemand]: 315/334 looper letters, 367 selfloop transitions, 30 changer transitions 1/401 dead transitions. [2023-11-17 11:38:42,412 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 401 transitions, 1690 flow [2023-11-17 11:38:42,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-17 11:38:42,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-17 11:38:42,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 453 transitions. [2023-11-17 11:38:42,415 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.22604790419161677 [2023-11-17 11:38:42,415 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 453 transitions. [2023-11-17 11:38:42,415 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 453 transitions. [2023-11-17 11:38:42,416 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:38:42,416 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 453 transitions. [2023-11-17 11:38:42,417 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 75.5) internal successors, (453), 6 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:38:42,420 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 334.0) internal successors, (2338), 7 states have internal predecessors, (2338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:38:42,420 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 334.0) internal successors, (2338), 7 states have internal predecessors, (2338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:38:42,420 INFO L175 Difference]: Start difference. First operand has 169 places, 192 transitions, 458 flow. Second operand 6 states and 453 transitions. [2023-11-17 11:38:42,421 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 401 transitions, 1690 flow [2023-11-17 11:38:42,430 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 401 transitions, 1676 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-17 11:38:42,432 INFO L231 Difference]: Finished difference. Result has 174 places, 202 transitions, 572 flow [2023-11-17 11:38:42,433 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=334, PETRI_DIFFERENCE_MINUEND_FLOW=444, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=572, PETRI_PLACES=174, PETRI_TRANSITIONS=202} [2023-11-17 11:38:42,434 INFO L281 CegarLoopForPetriNet]: 166 programPoint places, 8 predicate places. [2023-11-17 11:38:42,434 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 202 transitions, 572 flow [2023-11-17 11:38:42,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:38:42,435 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:38:42,435 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1] [2023-11-17 11:38:42,456 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-17 11:38:42,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:38:42,640 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-17 11:38:42,641 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:38:42,641 INFO L85 PathProgramCache]: Analyzing trace with hash -1138709767, now seen corresponding path program 2 times [2023-11-17 11:38:42,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:38:42,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721099210] [2023-11-17 11:38:42,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:38:42,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:38:42,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:38:42,928 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-17 11:38:42,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:38:42,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721099210] [2023-11-17 11:38:42,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721099210] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:38:42,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380747794] [2023-11-17 11:38:42,928 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 11:38:42,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:38:42,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:38:42,930 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 11:38:42,932 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-17 11:38:43,221 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 11:38:43,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 11:38:43,222 INFO L262 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-17 11:38:43,223 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:38:43,383 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-17 11:38:43,384 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-17 11:38:43,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1380747794] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:38:43,384 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-17 11:38:43,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-11-17 11:38:43,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808519625] [2023-11-17 11:38:43,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:38:43,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 11:38:43,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:38:43,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 11:38:43,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-17 11:38:43,385 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 334 [2023-11-17 11:38:43,385 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 202 transitions, 572 flow. Second operand has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:38:43,385 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:38:43,385 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 334 [2023-11-17 11:38:43,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand