/usr/bin/java -Xmx16000000000 -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-VariableLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/pthread-ext/01b_inc.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-b8dbc81 [2023-01-27 17:46:17,311 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-01-27 17:46:17,313 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-01-27 17:46:17,348 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-01-27 17:46:17,348 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-01-27 17:46:17,350 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-01-27 17:46:17,353 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-01-27 17:46:17,355 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-01-27 17:46:17,356 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-01-27 17:46:17,358 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-01-27 17:46:17,360 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-01-27 17:46:17,361 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-01-27 17:46:17,361 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-01-27 17:46:17,364 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-01-27 17:46:17,367 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-01-27 17:46:17,368 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-01-27 17:46:17,368 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-01-27 17:46:17,370 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-01-27 17:46:17,372 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-01-27 17:46:17,377 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-01-27 17:46:17,378 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-01-27 17:46:17,379 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-01-27 17:46:17,380 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-01-27 17:46:17,381 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-01-27 17:46:17,388 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-01-27 17:46:17,394 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-01-27 17:46:17,395 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-01-27 17:46:17,395 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-01-27 17:46:17,397 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-VariableLbe.epf [2023-01-27 17:46:17,423 INFO L113 SettingsManager]: Loading preferences was successful [2023-01-27 17:46:17,423 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-01-27 17:46:17,424 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-01-27 17:46:17,424 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-01-27 17:46:17,425 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-01-27 17:46:17,425 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-01-27 17:46:17,425 INFO L138 SettingsManager]: * Use SBE=true [2023-01-27 17:46:17,425 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-01-27 17:46:17,426 INFO L138 SettingsManager]: * sizeof long=4 [2023-01-27 17:46:17,426 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-01-27 17:46:17,426 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-01-27 17:46:17,426 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-01-27 17:46:17,427 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-01-27 17:46:17,427 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-01-27 17:46:17,427 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-01-27 17:46:17,427 INFO L138 SettingsManager]: * sizeof long double=12 [2023-01-27 17:46:17,427 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-01-27 17:46:17,427 INFO L138 SettingsManager]: * Use constant arrays=true [2023-01-27 17:46:17,427 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-01-27 17:46:17,427 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-01-27 17:46:17,427 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-01-27 17:46:17,428 INFO L138 SettingsManager]: * To the following directory=./dump/ [2023-01-27 17:46:17,428 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-01-27 17:46:17,428 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-27 17:46:17,428 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-01-27 17:46:17,428 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-01-27 17:46:17,428 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-01-27 17:46:17,428 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-01-27 17:46:17,428 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-01-27 17:46:17,429 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-01-27 17:46:17,429 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-01-27 17:46:17,429 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-01-27 17:46:17,676 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-01-27 17:46:17,693 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-01-27 17:46:17,695 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-01-27 17:46:17,696 INFO L271 PluginConnector]: Initializing CDTParser... [2023-01-27 17:46:17,697 INFO L275 PluginConnector]: CDTParser initialized [2023-01-27 17:46:17,698 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/01b_inc.i [2023-01-27 17:46:18,820 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-01-27 17:46:19,094 INFO L351 CDTParser]: Found 1 translation units. [2023-01-27 17:46:19,095 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/01b_inc.i [2023-01-27 17:46:19,106 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/87851d456/1d530cda10e44cbd8de54a3a1ef344b5/FLAG08e822f7f [2023-01-27 17:46:19,121 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/87851d456/1d530cda10e44cbd8de54a3a1ef344b5 [2023-01-27 17:46:19,124 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-01-27 17:46:19,125 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2023-01-27 17:46:19,126 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-01-27 17:46:19,126 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-01-27 17:46:19,135 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-01-27 17:46:19,135 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 05:46:19" (1/1) ... [2023-01-27 17:46:19,136 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@18697c85 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 05:46:19, skipping insertion in model container [2023-01-27 17:46:19,137 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 05:46:19" (1/1) ... [2023-01-27 17:46:19,142 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-01-27 17:46:19,188 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-01-27 17:46:19,378 WARN L633 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-01-27 17:46:19,502 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/01b_inc.i[31005,31018] [2023-01-27 17:46:19,512 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-27 17:46:19,519 INFO L203 MainTranslator]: Completed pre-run [2023-01-27 17:46:19,543 WARN L633 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-01-27 17:46:19,562 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/01b_inc.i[31005,31018] [2023-01-27 17:46:19,564 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-27 17:46:19,594 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-01-27 17:46:19,594 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-01-27 17:46:19,595 WARN L667 CHandler]: The function __builtin_bswap16 is called, but not defined or handled by StandardFunctionHandler. [2023-01-27 17:46:19,601 INFO L208 MainTranslator]: Completed translation [2023-01-27 17:46:19,601 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 05:46:19 WrapperNode [2023-01-27 17:46:19,601 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-01-27 17:46:19,602 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-01-27 17:46:19,602 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-01-27 17:46:19,602 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-01-27 17:46:19,608 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 05:46:19" (1/1) ... [2023-01-27 17:46:19,628 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 05:46:19" (1/1) ... [2023-01-27 17:46:19,649 INFO L138 Inliner]: procedures = 173, calls = 20, calls flagged for inlining = 7, calls inlined = 8, statements flattened = 62 [2023-01-27 17:46:19,650 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-01-27 17:46:19,651 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-01-27 17:46:19,651 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-01-27 17:46:19,651 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-01-27 17:46:19,658 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 05:46:19" (1/1) ... [2023-01-27 17:46:19,658 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 05:46:19" (1/1) ... [2023-01-27 17:46:19,671 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 05:46:19" (1/1) ... [2023-01-27 17:46:19,671 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 05:46:19" (1/1) ... [2023-01-27 17:46:19,675 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 05:46:19" (1/1) ... [2023-01-27 17:46:19,677 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 05:46:19" (1/1) ... [2023-01-27 17:46:19,678 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 05:46:19" (1/1) ... [2023-01-27 17:46:19,679 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 05:46:19" (1/1) ... [2023-01-27 17:46:19,692 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-01-27 17:46:19,693 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-01-27 17:46:19,693 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-01-27 17:46:19,694 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-01-27 17:46:19,695 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 05:46:19" (1/1) ... [2023-01-27 17:46:19,699 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-27 17:46:19,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 17:46:19,726 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) [2023-01-27 17:46:19,749 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 [2023-01-27 17:46:19,764 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-01-27 17:46:19,764 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-01-27 17:46:19,764 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-01-27 17:46:19,764 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-01-27 17:46:19,764 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-01-27 17:46:19,764 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-01-27 17:46:19,764 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-01-27 17:46:19,765 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-01-27 17:46:19,765 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-01-27 17:46:19,765 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-01-27 17:46:19,765 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-01-27 17:46:19,766 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-01-27 17:46:19,922 INFO L236 CfgBuilder]: Building ICFG [2023-01-27 17:46:19,924 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-01-27 17:46:20,084 INFO L277 CfgBuilder]: Performing block encoding [2023-01-27 17:46:20,127 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-01-27 17:46:20,127 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-01-27 17:46:20,129 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 05:46:20 BoogieIcfgContainer [2023-01-27 17:46:20,129 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-01-27 17:46:20,131 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-01-27 17:46:20,131 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-01-27 17:46:20,133 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-01-27 17:46:20,134 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.01 05:46:19" (1/3) ... [2023-01-27 17:46:20,134 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57646a54 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 05:46:20, skipping insertion in model container [2023-01-27 17:46:20,134 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 05:46:19" (2/3) ... [2023-01-27 17:46:20,134 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57646a54 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 05:46:20, skipping insertion in model container [2023-01-27 17:46:20,135 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 05:46:20" (3/3) ... [2023-01-27 17:46:20,136 INFO L112 eAbstractionObserver]: Analyzing ICFG 01b_inc.i [2023-01-27 17:46:20,150 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-01-27 17:46:20,150 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-01-27 17:46:20,150 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-01-27 17:46:20,186 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-01-27 17:46:20,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 41 places, 40 transitions, 85 flow [2023-01-27 17:46:20,247 INFO L130 PetriNetUnfolder]: 3/50 cut-off events. [2023-01-27 17:46:20,247 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-27 17:46:20,250 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55 conditions, 50 events. 3/50 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 73 event pairs, 0 based on Foata normal form. 0/44 useless extension candidates. Maximal degree in co-relation 26. Up to 4 conditions per place. [2023-01-27 17:46:20,250 INFO L82 GeneralOperation]: Start removeDead. Operand has 41 places, 40 transitions, 85 flow [2023-01-27 17:46:20,253 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 41 places, 40 transitions, 85 flow [2023-01-27 17:46:20,255 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-27 17:46:20,262 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 41 places, 40 transitions, 85 flow [2023-01-27 17:46:20,264 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 41 places, 40 transitions, 85 flow [2023-01-27 17:46:20,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 41 places, 40 transitions, 85 flow [2023-01-27 17:46:20,275 INFO L130 PetriNetUnfolder]: 3/50 cut-off events. [2023-01-27 17:46:20,275 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-27 17:46:20,276 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55 conditions, 50 events. 3/50 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 73 event pairs, 0 based on Foata normal form. 0/44 useless extension candidates. Maximal degree in co-relation 26. Up to 4 conditions per place. [2023-01-27 17:46:20,277 INFO L119 LiptonReduction]: Number of co-enabled transitions 364 [2023-01-27 17:46:21,806 INFO L134 LiptonReduction]: Checked pairs total: 330 [2023-01-27 17:46:21,806 INFO L136 LiptonReduction]: Total number of compositions: 38 [2023-01-27 17:46:21,818 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-27 17:46:21,823 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;@55d37be5, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-27 17:46:21,824 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-01-27 17:46:21,825 INFO L130 PetriNetUnfolder]: 0/5 cut-off events. [2023-01-27 17:46:21,826 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-27 17:46:21,826 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 17:46:21,826 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-01-27 17:46:21,826 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-27 17:46:21,830 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 17:46:21,830 INFO L85 PathProgramCache]: Analyzing trace with hash 7473566, now seen corresponding path program 1 times [2023-01-27 17:46:21,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 17:46:21,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586574021] [2023-01-27 17:46:21,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 17:46:21,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 17:46:21,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 17:46:21,974 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 17:46:21,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 17:46:21,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586574021] [2023-01-27 17:46:21,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586574021] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 17:46:21,975 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 17:46:21,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-01-27 17:46:21,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397787547] [2023-01-27 17:46:21,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 17:46:21,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-01-27 17:46:21,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 17:46:22,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-01-27 17:46:22,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-01-27 17:46:22,004 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 78 [2023-01-27 17:46:22,005 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 11 places, 8 transitions, 21 flow. Second operand has 2 states, 2 states have (on average 34.0) internal successors, (68), 2 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) [2023-01-27 17:46:22,005 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 17:46:22,005 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 78 [2023-01-27 17:46:22,006 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 17:46:22,039 INFO L130 PetriNetUnfolder]: 2/12 cut-off events. [2023-01-27 17:46:22,039 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-27 17:46:22,039 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29 conditions, 12 events. 2/12 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 10 event pairs, 2 based on Foata normal form. 0/12 useless extension candidates. Maximal degree in co-relation 14. Up to 11 conditions per place. [2023-01-27 17:46:22,040 INFO L137 encePairwiseOnDemand]: 76/78 looper letters, 5 selfloop transitions, 0 changer transitions 0/6 dead transitions. [2023-01-27 17:46:22,040 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 10 places, 6 transitions, 27 flow [2023-01-27 17:46:22,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-01-27 17:46:22,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-01-27 17:46:22,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 71 transitions. [2023-01-27 17:46:22,050 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4551282051282051 [2023-01-27 17:46:22,051 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 71 transitions. [2023-01-27 17:46:22,051 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 71 transitions. [2023-01-27 17:46:22,052 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 17:46:22,054 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 71 transitions. [2023-01-27 17:46:22,056 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 35.5) internal successors, (71), 2 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:46:22,065 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 78.0) internal successors, (234), 3 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:46:22,065 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 78.0) internal successors, (234), 3 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:46:22,067 INFO L175 Difference]: Start difference. First operand has 11 places, 8 transitions, 21 flow. Second operand 2 states and 71 transitions. [2023-01-27 17:46:22,068 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 10 places, 6 transitions, 27 flow [2023-01-27 17:46:22,069 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 10 places, 6 transitions, 27 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-01-27 17:46:22,070 INFO L231 Difference]: Finished difference. Result has 10 places, 6 transitions, 17 flow [2023-01-27 17:46:22,071 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=17, PETRI_DIFFERENCE_MINUEND_PLACES=9, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=6, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=6, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=17, PETRI_PLACES=10, PETRI_TRANSITIONS=6} [2023-01-27 17:46:22,075 INFO L281 CegarLoopForPetriNet]: 11 programPoint places, -1 predicate places. [2023-01-27 17:46:22,076 INFO L495 AbstractCegarLoop]: Abstraction has has 10 places, 6 transitions, 17 flow [2023-01-27 17:46:22,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 34.0) internal successors, (68), 2 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) [2023-01-27 17:46:22,076 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 17:46:22,077 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-01-27 17:46:22,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-01-27 17:46:22,077 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-27 17:46:22,080 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 17:46:22,080 INFO L85 PathProgramCache]: Analyzing trace with hash -1407855100, now seen corresponding path program 1 times [2023-01-27 17:46:22,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 17:46:22,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559932630] [2023-01-27 17:46:22,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 17:46:22,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 17:46:22,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 17:46:22,115 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-27 17:46:22,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 17:46:22,151 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-27 17:46:22,152 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-27 17:46:22,153 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-01-27 17:46:22,155 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2023-01-27 17:46:22,158 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2023-01-27 17:46:22,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-01-27 17:46:22,164 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-01-27 17:46:22,167 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-27 17:46:22,168 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-01-27 17:46:22,191 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-01-27 17:46:22,198 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 57 places, 55 transitions, 122 flow [2023-01-27 17:46:22,213 INFO L130 PetriNetUnfolder]: 5/77 cut-off events. [2023-01-27 17:46:22,213 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-27 17:46:22,214 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87 conditions, 77 events. 5/77 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 134 event pairs, 0 based on Foata normal form. 0/67 useless extension candidates. Maximal degree in co-relation 51. Up to 6 conditions per place. [2023-01-27 17:46:22,214 INFO L82 GeneralOperation]: Start removeDead. Operand has 57 places, 55 transitions, 122 flow [2023-01-27 17:46:22,215 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 57 places, 55 transitions, 122 flow [2023-01-27 17:46:22,215 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-27 17:46:22,215 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 57 places, 55 transitions, 122 flow [2023-01-27 17:46:22,215 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 57 places, 55 transitions, 122 flow [2023-01-27 17:46:22,215 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 57 places, 55 transitions, 122 flow [2023-01-27 17:46:22,239 INFO L130 PetriNetUnfolder]: 5/77 cut-off events. [2023-01-27 17:46:22,239 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-27 17:46:22,241 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87 conditions, 77 events. 5/77 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 134 event pairs, 0 based on Foata normal form. 0/67 useless extension candidates. Maximal degree in co-relation 51. Up to 6 conditions per place. [2023-01-27 17:46:22,242 INFO L119 LiptonReduction]: Number of co-enabled transitions 1148 [2023-01-27 17:46:23,186 INFO L134 LiptonReduction]: Checked pairs total: 3716 [2023-01-27 17:46:23,186 INFO L136 LiptonReduction]: Total number of compositions: 32 [2023-01-27 17:46:23,188 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-27 17:46:23,189 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;@55d37be5, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-27 17:46:23,189 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-01-27 17:46:23,193 INFO L130 PetriNetUnfolder]: 1/22 cut-off events. [2023-01-27 17:46:23,193 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-01-27 17:46:23,193 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 17:46:23,193 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 17:46:23,194 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-01-27 17:46:23,194 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 17:46:23,194 INFO L85 PathProgramCache]: Analyzing trace with hash 626667327, now seen corresponding path program 1 times [2023-01-27 17:46:23,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 17:46:23,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230165122] [2023-01-27 17:46:23,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 17:46:23,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 17:46:23,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 17:46:23,389 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 17:46:23,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 17:46:23,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230165122] [2023-01-27 17:46:23,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230165122] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 17:46:23,390 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 17:46:23,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-01-27 17:46:23,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274018940] [2023-01-27 17:46:23,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 17:46:23,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-27 17:46:23,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 17:46:23,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-27 17:46:23,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-01-27 17:46:23,392 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 87 [2023-01-27 17:46:23,392 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 26 transitions, 64 flow. Second operand has 5 states, 5 states have (on average 32.8) internal successors, (164), 5 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:46:23,392 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 17:46:23,392 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 87 [2023-01-27 17:46:23,393 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 17:46:23,577 INFO L130 PetriNetUnfolder]: 256/475 cut-off events. [2023-01-27 17:46:23,577 INFO L131 PetriNetUnfolder]: For 20/20 co-relation queries the response was YES. [2023-01-27 17:46:23,581 INFO L83 FinitePrefix]: Finished finitePrefix Result has 974 conditions, 475 events. 256/475 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 2514 event pairs, 53 based on Foata normal form. 0/410 useless extension candidates. Maximal degree in co-relation 884. Up to 148 conditions per place. [2023-01-27 17:46:23,587 INFO L137 encePairwiseOnDemand]: 78/87 looper letters, 43 selfloop transitions, 9 changer transitions 0/55 dead transitions. [2023-01-27 17:46:23,587 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 55 transitions, 236 flow [2023-01-27 17:46:23,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-27 17:46:23,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-27 17:46:23,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 247 transitions. [2023-01-27 17:46:23,590 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4731800766283525 [2023-01-27 17:46:23,590 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 247 transitions. [2023-01-27 17:46:23,590 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 247 transitions. [2023-01-27 17:46:23,591 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 17:46:23,591 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 247 transitions. [2023-01-27 17:46:23,593 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 41.166666666666664) internal successors, (247), 6 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:46:23,594 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 87.0) internal successors, (609), 7 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:46:23,595 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 87.0) internal successors, (609), 7 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:46:23,595 INFO L175 Difference]: Start difference. First operand has 29 places, 26 transitions, 64 flow. Second operand 6 states and 247 transitions. [2023-01-27 17:46:23,595 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 55 transitions, 236 flow [2023-01-27 17:46:23,596 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 55 transitions, 234 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-01-27 17:46:23,597 INFO L231 Difference]: Finished difference. Result has 37 places, 31 transitions, 116 flow [2023-01-27 17:46:23,597 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=116, PETRI_PLACES=37, PETRI_TRANSITIONS=31} [2023-01-27 17:46:23,597 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 8 predicate places. [2023-01-27 17:46:23,598 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 31 transitions, 116 flow [2023-01-27 17:46:23,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 32.8) internal successors, (164), 5 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:46:23,598 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 17:46:23,598 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-01-27 17:46:23,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-01-27 17:46:23,599 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-01-27 17:46:23,599 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 17:46:23,599 INFO L85 PathProgramCache]: Analyzing trace with hash 1647591444, now seen corresponding path program 1 times [2023-01-27 17:46:23,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 17:46:23,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969538531] [2023-01-27 17:46:23,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 17:46:23,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 17:46:23,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 17:46:23,611 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-27 17:46:23,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 17:46:23,621 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-27 17:46:23,621 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-27 17:46:23,622 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-01-27 17:46:23,622 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-01-27 17:46:23,622 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2023-01-27 17:46:23,622 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2023-01-27 17:46:23,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-01-27 17:46:23,623 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-01-27 17:46:23,623 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-27 17:46:23,623 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-01-27 17:46:23,640 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-01-27 17:46:23,642 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 73 places, 70 transitions, 161 flow [2023-01-27 17:46:23,652 INFO L130 PetriNetUnfolder]: 7/104 cut-off events. [2023-01-27 17:46:23,652 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-01-27 17:46:23,653 INFO L83 FinitePrefix]: Finished finitePrefix Result has 120 conditions, 104 events. 7/104 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 214 event pairs, 0 based on Foata normal form. 0/90 useless extension candidates. Maximal degree in co-relation 81. Up to 8 conditions per place. [2023-01-27 17:46:23,653 INFO L82 GeneralOperation]: Start removeDead. Operand has 73 places, 70 transitions, 161 flow [2023-01-27 17:46:23,654 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 73 places, 70 transitions, 161 flow [2023-01-27 17:46:23,654 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-27 17:46:23,654 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 73 places, 70 transitions, 161 flow [2023-01-27 17:46:23,654 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 73 places, 70 transitions, 161 flow [2023-01-27 17:46:23,654 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 73 places, 70 transitions, 161 flow [2023-01-27 17:46:23,662 INFO L130 PetriNetUnfolder]: 7/104 cut-off events. [2023-01-27 17:46:23,662 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-01-27 17:46:23,663 INFO L83 FinitePrefix]: Finished finitePrefix Result has 120 conditions, 104 events. 7/104 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 214 event pairs, 0 based on Foata normal form. 0/90 useless extension candidates. Maximal degree in co-relation 81. Up to 8 conditions per place. [2023-01-27 17:46:23,664 INFO L119 LiptonReduction]: Number of co-enabled transitions 2352 [2023-01-27 17:46:24,833 INFO L134 LiptonReduction]: Checked pairs total: 10314 [2023-01-27 17:46:24,833 INFO L136 LiptonReduction]: Total number of compositions: 38 [2023-01-27 17:46:24,835 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-27 17:46:24,835 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;@55d37be5, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-27 17:46:24,835 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-01-27 17:46:24,837 INFO L130 PetriNetUnfolder]: 1/22 cut-off events. [2023-01-27 17:46:24,837 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-01-27 17:46:24,838 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 17:46:24,838 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 17:46:24,838 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-01-27 17:46:24,838 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 17:46:24,838 INFO L85 PathProgramCache]: Analyzing trace with hash -1282466881, now seen corresponding path program 1 times [2023-01-27 17:46:24,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 17:46:24,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204091066] [2023-01-27 17:46:24,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 17:46:24,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 17:46:24,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 17:46:25,027 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 17:46:25,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 17:46:25,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204091066] [2023-01-27 17:46:25,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204091066] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 17:46:25,028 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 17:46:25,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-01-27 17:46:25,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467727090] [2023-01-27 17:46:25,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 17:46:25,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-27 17:46:25,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 17:46:25,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-27 17:46:25,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-01-27 17:46:25,032 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 108 [2023-01-27 17:46:25,032 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 36 transitions, 93 flow. Second operand has 5 states, 5 states have (on average 37.8) internal successors, (189), 5 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:46:25,032 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 17:46:25,033 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 108 [2023-01-27 17:46:25,033 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 17:46:25,727 INFO L130 PetriNetUnfolder]: 5256/7668 cut-off events. [2023-01-27 17:46:25,728 INFO L131 PetriNetUnfolder]: For 622/622 co-relation queries the response was YES. [2023-01-27 17:46:25,736 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15756 conditions, 7668 events. 5256/7668 cut-off events. For 622/622 co-relation queries the response was YES. Maximal size of possible extension queue 560. Compared 47302 event pairs, 1315 based on Foata normal form. 0/6308 useless extension candidates. Maximal degree in co-relation 8306. Up to 3200 conditions per place. [2023-01-27 17:46:25,776 INFO L137 encePairwiseOnDemand]: 97/108 looper letters, 92 selfloop transitions, 12 changer transitions 0/107 dead transitions. [2023-01-27 17:46:25,776 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 107 transitions, 481 flow [2023-01-27 17:46:25,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-27 17:46:25,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-27 17:46:25,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 331 transitions. [2023-01-27 17:46:25,779 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5108024691358025 [2023-01-27 17:46:25,779 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 331 transitions. [2023-01-27 17:46:25,779 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 331 transitions. [2023-01-27 17:46:25,779 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 17:46:25,780 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 331 transitions. [2023-01-27 17:46:25,781 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 55.166666666666664) internal successors, (331), 6 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:46:25,783 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 108.0) internal successors, (756), 7 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:46:25,783 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 108.0) internal successors, (756), 7 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:46:25,783 INFO L175 Difference]: Start difference. First operand has 40 places, 36 transitions, 93 flow. Second operand 6 states and 331 transitions. [2023-01-27 17:46:25,783 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 107 transitions, 481 flow [2023-01-27 17:46:25,785 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 107 transitions, 467 flow, removed 7 selfloop flow, removed 0 redundant places. [2023-01-27 17:46:25,786 INFO L231 Difference]: Finished difference. Result has 48 places, 47 transitions, 176 flow [2023-01-27 17:46:25,786 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=108, PETRI_DIFFERENCE_MINUEND_FLOW=85, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=176, PETRI_PLACES=48, PETRI_TRANSITIONS=47} [2023-01-27 17:46:25,787 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 8 predicate places. [2023-01-27 17:46:25,787 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 47 transitions, 176 flow [2023-01-27 17:46:25,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 37.8) internal successors, (189), 5 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:46:25,788 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 17:46:25,788 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 17:46:25,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-01-27 17:46:25,788 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-01-27 17:46:25,788 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 17:46:25,789 INFO L85 PathProgramCache]: Analyzing trace with hash -1558574825, now seen corresponding path program 1 times [2023-01-27 17:46:25,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 17:46:25,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404359961] [2023-01-27 17:46:25,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 17:46:25,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 17:46:25,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 17:46:25,899 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 17:46:25,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 17:46:25,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404359961] [2023-01-27 17:46:25,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404359961] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 17:46:25,901 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 17:46:25,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-01-27 17:46:25,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118708797] [2023-01-27 17:46:25,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 17:46:25,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-27 17:46:25,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 17:46:25,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-27 17:46:25,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-01-27 17:46:25,904 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 108 [2023-01-27 17:46:25,905 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 47 transitions, 176 flow. Second operand has 5 states, 5 states have (on average 38.0) internal successors, (190), 5 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:46:25,905 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 17:46:25,905 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 108 [2023-01-27 17:46:25,905 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 17:46:26,884 INFO L130 PetriNetUnfolder]: 7361/10903 cut-off events. [2023-01-27 17:46:26,885 INFO L131 PetriNetUnfolder]: For 3753/3753 co-relation queries the response was YES. [2023-01-27 17:46:26,902 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25528 conditions, 10903 events. 7361/10903 cut-off events. For 3753/3753 co-relation queries the response was YES. Maximal size of possible extension queue 817. Compared 73636 event pairs, 2187 based on Foata normal form. 0/9933 useless extension candidates. Maximal degree in co-relation 18620. Up to 4998 conditions per place. [2023-01-27 17:46:26,960 INFO L137 encePairwiseOnDemand]: 101/108 looper letters, 97 selfloop transitions, 19 changer transitions 0/119 dead transitions. [2023-01-27 17:46:26,960 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 119 transitions, 650 flow [2023-01-27 17:46:26,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-27 17:46:26,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-27 17:46:26,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 320 transitions. [2023-01-27 17:46:26,962 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49382716049382713 [2023-01-27 17:46:26,962 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 320 transitions. [2023-01-27 17:46:26,963 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 320 transitions. [2023-01-27 17:46:26,963 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 17:46:26,963 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 320 transitions. [2023-01-27 17:46:26,964 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 53.333333333333336) internal successors, (320), 6 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:46:26,966 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 108.0) internal successors, (756), 7 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:46:26,966 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 108.0) internal successors, (756), 7 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:46:26,966 INFO L175 Difference]: Start difference. First operand has 48 places, 47 transitions, 176 flow. Second operand 6 states and 320 transitions. [2023-01-27 17:46:26,966 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 119 transitions, 650 flow [2023-01-27 17:46:26,986 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 119 transitions, 650 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-01-27 17:46:26,988 INFO L231 Difference]: Finished difference. Result has 55 places, 59 transitions, 306 flow [2023-01-27 17:46:26,988 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=108, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=306, PETRI_PLACES=55, PETRI_TRANSITIONS=59} [2023-01-27 17:46:26,989 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 15 predicate places. [2023-01-27 17:46:26,989 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 59 transitions, 306 flow [2023-01-27 17:46:26,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 38.0) internal successors, (190), 5 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:46:26,989 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 17:46:26,990 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-01-27 17:46:26,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-01-27 17:46:26,990 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-01-27 17:46:26,990 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 17:46:26,990 INFO L85 PathProgramCache]: Analyzing trace with hash -547612026, now seen corresponding path program 1 times [2023-01-27 17:46:26,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 17:46:26,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257083780] [2023-01-27 17:46:26,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 17:46:26,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 17:46:27,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 17:46:27,000 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-27 17:46:27,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 17:46:27,010 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-27 17:46:27,010 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-27 17:46:27,010 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2023-01-27 17:46:27,010 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2023-01-27 17:46:27,011 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2023-01-27 17:46:27,011 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2023-01-27 17:46:27,011 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2023-01-27 17:46:27,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-01-27 17:46:27,011 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-01-27 17:46:27,012 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-27 17:46:27,012 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-01-27 17:46:27,032 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-01-27 17:46:27,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 89 places, 85 transitions, 202 flow [2023-01-27 17:46:27,045 INFO L130 PetriNetUnfolder]: 9/131 cut-off events. [2023-01-27 17:46:27,045 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-01-27 17:46:27,045 INFO L83 FinitePrefix]: Finished finitePrefix Result has 154 conditions, 131 events. 9/131 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 266 event pairs, 0 based on Foata normal form. 0/113 useless extension candidates. Maximal degree in co-relation 112. Up to 10 conditions per place. [2023-01-27 17:46:27,046 INFO L82 GeneralOperation]: Start removeDead. Operand has 89 places, 85 transitions, 202 flow [2023-01-27 17:46:27,046 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 89 places, 85 transitions, 202 flow [2023-01-27 17:46:27,047 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-27 17:46:27,047 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 89 places, 85 transitions, 202 flow [2023-01-27 17:46:27,047 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 89 places, 85 transitions, 202 flow [2023-01-27 17:46:27,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 89 places, 85 transitions, 202 flow [2023-01-27 17:46:27,058 INFO L130 PetriNetUnfolder]: 9/131 cut-off events. [2023-01-27 17:46:27,058 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-01-27 17:46:27,058 INFO L83 FinitePrefix]: Finished finitePrefix Result has 154 conditions, 131 events. 9/131 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 266 event pairs, 0 based on Foata normal form. 0/113 useless extension candidates. Maximal degree in co-relation 112. Up to 10 conditions per place. [2023-01-27 17:46:27,061 INFO L119 LiptonReduction]: Number of co-enabled transitions 3976 [2023-01-27 17:46:28,382 INFO L134 LiptonReduction]: Checked pairs total: 15362 [2023-01-27 17:46:28,382 INFO L136 LiptonReduction]: Total number of compositions: 44 [2023-01-27 17:46:28,384 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-27 17:46:28,384 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;@55d37be5, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-27 17:46:28,384 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-01-27 17:46:28,386 INFO L130 PetriNetUnfolder]: 1/22 cut-off events. [2023-01-27 17:46:28,386 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-01-27 17:46:28,386 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 17:46:28,386 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 17:46:28,386 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-01-27 17:46:28,387 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 17:46:28,387 INFO L85 PathProgramCache]: Analyzing trace with hash 1057443007, now seen corresponding path program 1 times [2023-01-27 17:46:28,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 17:46:28,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842737125] [2023-01-27 17:46:28,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 17:46:28,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 17:46:28,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 17:46:28,476 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 17:46:28,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 17:46:28,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842737125] [2023-01-27 17:46:28,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842737125] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 17:46:28,477 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 17:46:28,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-01-27 17:46:28,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461384809] [2023-01-27 17:46:28,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 17:46:28,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-27 17:46:28,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 17:46:28,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-27 17:46:28,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-01-27 17:46:28,478 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 41 out of 129 [2023-01-27 17:46:28,479 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 46 transitions, 124 flow. Second operand has 5 states, 5 states have (on average 42.8) internal successors, (214), 5 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:46:28,479 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 17:46:28,479 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 41 of 129 [2023-01-27 17:46:28,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 17:46:35,186 INFO L130 PetriNetUnfolder]: 77874/102128 cut-off events. [2023-01-27 17:46:35,186 INFO L131 PetriNetUnfolder]: For 11600/11600 co-relation queries the response was YES. [2023-01-27 17:46:35,314 INFO L83 FinitePrefix]: Finished finitePrefix Result has 210140 conditions, 102128 events. 77874/102128 cut-off events. For 11600/11600 co-relation queries the response was YES. Maximal size of possible extension queue 5190. Compared 660259 event pairs, 21367 based on Foata normal form. 0/82714 useless extension candidates. Maximal degree in co-relation 44210. Up to 46474 conditions per place. [2023-01-27 17:46:35,828 INFO L137 encePairwiseOnDemand]: 116/129 looper letters, 129 selfloop transitions, 15 changer transitions 0/147 dead transitions. [2023-01-27 17:46:35,828 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 147 transitions, 688 flow [2023-01-27 17:46:35,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-27 17:46:35,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-27 17:46:35,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 403 transitions. [2023-01-27 17:46:35,830 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.520671834625323 [2023-01-27 17:46:35,830 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 403 transitions. [2023-01-27 17:46:35,830 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 403 transitions. [2023-01-27 17:46:35,831 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 17:46:35,831 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 403 transitions. [2023-01-27 17:46:35,833 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 67.16666666666667) internal successors, (403), 6 states have internal predecessors, (403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:46:35,834 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 129.0) internal successors, (903), 7 states have internal predecessors, (903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:46:35,834 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 129.0) internal successors, (903), 7 states have internal predecessors, (903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:46:35,834 INFO L175 Difference]: Start difference. First operand has 51 places, 46 transitions, 124 flow. Second operand 6 states and 403 transitions. [2023-01-27 17:46:35,835 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 147 transitions, 688 flow [2023-01-27 17:46:35,840 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 147 transitions, 652 flow, removed 18 selfloop flow, removed 0 redundant places. [2023-01-27 17:46:35,843 INFO L231 Difference]: Finished difference. Result has 59 places, 61 transitions, 228 flow [2023-01-27 17:46:35,845 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=129, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=228, PETRI_PLACES=59, PETRI_TRANSITIONS=61} [2023-01-27 17:46:35,847 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 8 predicate places. [2023-01-27 17:46:35,847 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 61 transitions, 228 flow [2023-01-27 17:46:35,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 42.8) internal successors, (214), 5 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:46:35,847 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 17:46:35,847 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 17:46:35,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-01-27 17:46:35,847 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-01-27 17:46:35,848 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 17:46:35,848 INFO L85 PathProgramCache]: Analyzing trace with hash -1487924442, now seen corresponding path program 1 times [2023-01-27 17:46:35,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 17:46:35,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729254740] [2023-01-27 17:46:35,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 17:46:35,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 17:46:35,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 17:46:35,951 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 17:46:35,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 17:46:35,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729254740] [2023-01-27 17:46:35,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729254740] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 17:46:35,952 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 17:46:35,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-01-27 17:46:35,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111031886] [2023-01-27 17:46:35,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 17:46:35,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-27 17:46:35,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 17:46:35,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-27 17:46:35,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-01-27 17:46:35,954 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 41 out of 129 [2023-01-27 17:46:35,954 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 61 transitions, 228 flow. Second operand has 5 states, 5 states have (on average 43.0) internal successors, (215), 5 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:46:35,954 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 17:46:35,954 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 41 of 129 [2023-01-27 17:46:35,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 17:46:46,365 INFO L130 PetriNetUnfolder]: 124153/164211 cut-off events. [2023-01-27 17:46:46,365 INFO L131 PetriNetUnfolder]: For 63957/63957 co-relation queries the response was YES. [2023-01-27 17:46:46,657 INFO L83 FinitePrefix]: Finished finitePrefix Result has 386609 conditions, 164211 events. 124153/164211 cut-off events. For 63957/63957 co-relation queries the response was YES. Maximal size of possible extension queue 8439. Compared 1153731 event pairs, 38229 based on Foata normal form. 0/148786 useless extension candidates. Maximal degree in co-relation 216145. Up to 79252 conditions per place. [2023-01-27 17:46:47,308 INFO L137 encePairwiseOnDemand]: 121/129 looper letters, 140 selfloop transitions, 25 changer transitions 0/168 dead transitions. [2023-01-27 17:46:47,308 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 168 transitions, 921 flow [2023-01-27 17:46:47,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-27 17:46:47,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-27 17:46:47,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 390 transitions. [2023-01-27 17:46:47,310 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5038759689922481 [2023-01-27 17:46:47,310 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 390 transitions. [2023-01-27 17:46:47,310 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 390 transitions. [2023-01-27 17:46:47,310 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 17:46:47,310 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 390 transitions. [2023-01-27 17:46:47,311 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 65.0) internal successors, (390), 6 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:46:47,313 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 129.0) internal successors, (903), 7 states have internal predecessors, (903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:46:47,313 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 129.0) internal successors, (903), 7 states have internal predecessors, (903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:46:47,313 INFO L175 Difference]: Start difference. First operand has 59 places, 61 transitions, 228 flow. Second operand 6 states and 390 transitions. [2023-01-27 17:46:47,313 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 168 transitions, 921 flow [2023-01-27 17:46:47,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 168 transitions, 921 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-01-27 17:46:47,861 INFO L231 Difference]: Finished difference. Result has 66 places, 77 transitions, 399 flow [2023-01-27 17:46:47,861 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=129, PETRI_DIFFERENCE_MINUEND_FLOW=228, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=399, PETRI_PLACES=66, PETRI_TRANSITIONS=77} [2023-01-27 17:46:47,862 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 15 predicate places. [2023-01-27 17:46:47,862 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 77 transitions, 399 flow [2023-01-27 17:46:47,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 43.0) internal successors, (215), 5 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:46:47,862 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 17:46:47,862 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 17:46:47,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-01-27 17:46:47,863 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-01-27 17:46:47,863 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 17:46:47,863 INFO L85 PathProgramCache]: Analyzing trace with hash 1019157899, now seen corresponding path program 1 times [2023-01-27 17:46:47,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 17:46:47,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189869627] [2023-01-27 17:46:47,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 17:46:47,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 17:46:47,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 17:46:47,958 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-01-27 17:46:47,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 17:46:47,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189869627] [2023-01-27 17:46:47,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189869627] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 17:46:47,959 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 17:46:47,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-01-27 17:46:47,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143770086] [2023-01-27 17:46:47,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 17:46:47,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-27 17:46:47,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 17:46:47,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-27 17:46:47,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-01-27 17:46:47,961 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 41 out of 129 [2023-01-27 17:46:47,961 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 77 transitions, 399 flow. Second operand has 5 states, 5 states have (on average 43.2) internal successors, (216), 5 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:46:47,961 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 17:46:47,961 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 41 of 129 [2023-01-27 17:46:47,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 17:47:03,870 INFO L130 PetriNetUnfolder]: 188457/251259 cut-off events. [2023-01-27 17:47:03,870 INFO L131 PetriNetUnfolder]: For 165005/165005 co-relation queries the response was YES. [2023-01-27 17:47:04,424 INFO L83 FinitePrefix]: Finished finitePrefix Result has 634261 conditions, 251259 events. 188457/251259 cut-off events. For 165005/165005 co-relation queries the response was YES. Maximal size of possible extension queue 13093. Compared 1892231 event pairs, 61281 based on Foata normal form. 0/234139 useless extension candidates. Maximal degree in co-relation 401061. Up to 126840 conditions per place. [2023-01-27 17:47:05,576 INFO L137 encePairwiseOnDemand]: 121/129 looper letters, 153 selfloop transitions, 37 changer transitions 0/193 dead transitions. [2023-01-27 17:47:05,576 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 193 transitions, 1297 flow [2023-01-27 17:47:05,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-27 17:47:05,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-27 17:47:05,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 387 transitions. [2023-01-27 17:47:05,578 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2023-01-27 17:47:05,578 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 387 transitions. [2023-01-27 17:47:05,578 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 387 transitions. [2023-01-27 17:47:05,579 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 17:47:05,579 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 387 transitions. [2023-01-27 17:47:05,580 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 64.5) internal successors, (387), 6 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:47:05,581 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 129.0) internal successors, (903), 7 states have internal predecessors, (903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:47:05,581 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 129.0) internal successors, (903), 7 states have internal predecessors, (903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:47:05,581 INFO L175 Difference]: Start difference. First operand has 66 places, 77 transitions, 399 flow. Second operand 6 states and 387 transitions. [2023-01-27 17:47:05,581 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 193 transitions, 1297 flow [2023-01-27 17:47:06,689 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 193 transitions, 1297 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-01-27 17:47:06,691 INFO L231 Difference]: Finished difference. Result has 73 places, 100 transitions, 701 flow [2023-01-27 17:47:06,691 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=129, PETRI_DIFFERENCE_MINUEND_FLOW=399, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=701, PETRI_PLACES=73, PETRI_TRANSITIONS=100} [2023-01-27 17:47:06,692 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 22 predicate places. [2023-01-27 17:47:06,692 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 100 transitions, 701 flow [2023-01-27 17:47:06,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 43.2) internal successors, (216), 5 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:47:06,692 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 17:47:06,692 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 17:47:06,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-01-27 17:47:06,693 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-01-27 17:47:06,693 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 17:47:06,693 INFO L85 PathProgramCache]: Analyzing trace with hash -432163817, now seen corresponding path program 1 times [2023-01-27 17:47:06,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 17:47:06,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342800634] [2023-01-27 17:47:06,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 17:47:06,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 17:47:06,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 17:47:06,821 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 17:47:06,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 17:47:06,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342800634] [2023-01-27 17:47:06,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342800634] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 17:47:06,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783971141] [2023-01-27 17:47:06,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 17:47:06,822 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 17:47:06,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 17:47:06,824 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) [2023-01-27 17:47:06,828 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-01-27 17:47:06,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 17:47:06,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 18 conjunts are in the unsatisfiable core [2023-01-27 17:47:06,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 17:47:07,090 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 17:47:07,090 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 17:47:07,237 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 17:47:07,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [783971141] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 17:47:07,238 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 17:47:07,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 13 [2023-01-27 17:47:07,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733446796] [2023-01-27 17:47:07,238 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 17:47:07,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-01-27 17:47:07,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 17:47:07,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-01-27 17:47:07,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2023-01-27 17:47:07,240 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 39 out of 129 [2023-01-27 17:47:07,241 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 100 transitions, 701 flow. Second operand has 15 states, 15 states have (on average 41.266666666666666) internal successors, (619), 15 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:47:07,241 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 17:47:07,241 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 39 of 129 [2023-01-27 17:47:07,241 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 17:48:42,730 INFO L130 PetriNetUnfolder]: 834109/1124812 cut-off events. [2023-01-27 17:48:42,731 INFO L131 PetriNetUnfolder]: For 1063810/1063810 co-relation queries the response was YES. [2023-01-27 17:48:45,845 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3021040 conditions, 1124812 events. 834109/1124812 cut-off events. For 1063810/1063810 co-relation queries the response was YES. Maximal size of possible extension queue 63665. Compared 10045942 event pairs, 67312 based on Foata normal form. 53792/1135002 useless extension candidates. Maximal degree in co-relation 3020923. Up to 145347 conditions per place. [2023-01-27 17:48:50,514 INFO L137 encePairwiseOnDemand]: 96/129 looper letters, 1138 selfloop transitions, 983 changer transitions 0/2124 dead transitions. [2023-01-27 17:48:50,515 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 2124 transitions, 14284 flow [2023-01-27 17:48:50,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2023-01-27 17:48:50,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2023-01-27 17:48:50,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 4560 transitions. [2023-01-27 17:48:50,527 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5198358413132695 [2023-01-27 17:48:50,527 INFO L72 ComplementDD]: Start complementDD. Operand 68 states and 4560 transitions. [2023-01-27 17:48:50,527 INFO L73 IsDeterministic]: Start isDeterministic. Operand 68 states and 4560 transitions. [2023-01-27 17:48:50,530 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 17:48:50,530 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 68 states and 4560 transitions. [2023-01-27 17:48:50,539 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 69 states, 68 states have (on average 67.05882352941177) internal successors, (4560), 68 states have internal predecessors, (4560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:48:50,551 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 69 states, 69 states have (on average 129.0) internal successors, (8901), 69 states have internal predecessors, (8901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:48:50,553 INFO L81 ComplementDD]: Finished complementDD. Result has 69 states, 69 states have (on average 129.0) internal successors, (8901), 69 states have internal predecessors, (8901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:48:50,553 INFO L175 Difference]: Start difference. First operand has 73 places, 100 transitions, 701 flow. Second operand 68 states and 4560 transitions. [2023-01-27 17:48:50,553 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 2124 transitions, 14284 flow [2023-01-27 17:50:33,962 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 2124 transitions, 14284 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-01-27 17:50:33,985 INFO L231 Difference]: Finished difference. Result has 205 places, 1115 transitions, 12022 flow [2023-01-27 17:50:33,985 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=129, PETRI_DIFFERENCE_MINUEND_FLOW=701, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=68, PETRI_FLOW=12022, PETRI_PLACES=205, PETRI_TRANSITIONS=1115} [2023-01-27 17:50:33,986 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 154 predicate places. [2023-01-27 17:50:33,986 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 1115 transitions, 12022 flow [2023-01-27 17:50:33,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 41.266666666666666) internal successors, (619), 15 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:50:33,986 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 17:50:33,986 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 17:50:33,998 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-01-27 17:50:34,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-01-27 17:50:34,197 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-01-27 17:50:34,198 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 17:50:34,198 INFO L85 PathProgramCache]: Analyzing trace with hash -155906351, now seen corresponding path program 1 times [2023-01-27 17:50:34,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 17:50:34,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135827878] [2023-01-27 17:50:34,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 17:50:34,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 17:50:34,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 17:50:34,310 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 17:50:34,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 17:50:34,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135827878] [2023-01-27 17:50:34,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135827878] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 17:50:34,311 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 17:50:34,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-01-27 17:50:34,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994247077] [2023-01-27 17:50:34,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 17:50:34,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-01-27 17:50:34,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 17:50:34,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-01-27 17:50:34,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-01-27 17:50:34,313 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 129 [2023-01-27 17:50:34,313 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 1115 transitions, 12022 flow. Second operand has 6 states, 6 states have (on average 42.333333333333336) internal successors, (254), 6 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:50:34,313 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 17:50:34,313 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 129 [2023-01-27 17:50:34,313 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand