/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/goblint-regression/28-race_reach_41-trylock_racefree.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-b8dbc81 [2023-01-27 19:16:04,231 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-01-27 19:16:04,233 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-01-27 19:16:04,260 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-01-27 19:16:04,260 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-01-27 19:16:04,263 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-01-27 19:16:04,265 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-01-27 19:16:04,267 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-01-27 19:16:04,268 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-01-27 19:16:04,272 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-01-27 19:16:04,274 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-01-27 19:16:04,276 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-01-27 19:16:04,276 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-01-27 19:16:04,278 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-01-27 19:16:04,279 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-01-27 19:16:04,280 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-01-27 19:16:04,281 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-01-27 19:16:04,305 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-01-27 19:16:04,308 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-01-27 19:16:04,320 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-01-27 19:16:04,349 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-01-27 19:16:04,370 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-01-27 19:16:04,370 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-01-27 19:16:04,371 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-01-27 19:16:04,372 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-01-27 19:16:04,402 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-01-27 19:16:04,403 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-01-27 19:16:04,403 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-01-27 19:16:04,404 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 19:16:04,469 INFO L113 SettingsManager]: Loading preferences was successful [2023-01-27 19:16:04,469 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-01-27 19:16:04,470 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-01-27 19:16:04,470 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-01-27 19:16:04,471 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-01-27 19:16:04,471 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-01-27 19:16:04,471 INFO L138 SettingsManager]: * Use SBE=true [2023-01-27 19:16:04,471 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-01-27 19:16:04,471 INFO L138 SettingsManager]: * sizeof long=4 [2023-01-27 19:16:04,471 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-01-27 19:16:04,472 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-01-27 19:16:04,472 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-01-27 19:16:04,472 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-01-27 19:16:04,472 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-01-27 19:16:04,472 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-01-27 19:16:04,472 INFO L138 SettingsManager]: * sizeof long double=12 [2023-01-27 19:16:04,472 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-01-27 19:16:04,473 INFO L138 SettingsManager]: * Use constant arrays=true [2023-01-27 19:16:04,473 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-01-27 19:16:04,473 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-01-27 19:16:04,473 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-01-27 19:16:04,473 INFO L138 SettingsManager]: * To the following directory=./dump/ [2023-01-27 19:16:04,473 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-01-27 19:16:04,473 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-27 19:16:04,473 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-01-27 19:16:04,473 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-01-27 19:16:04,474 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-01-27 19:16:04,474 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-01-27 19:16:04,474 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-01-27 19:16:04,474 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-01-27 19:16:04,474 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-01-27 19:16:04,474 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-01-27 19:16:04,885 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-01-27 19:16:04,922 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-01-27 19:16:04,925 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-01-27 19:16:04,926 INFO L271 PluginConnector]: Initializing CDTParser... [2023-01-27 19:16:04,927 INFO L275 PluginConnector]: CDTParser initialized [2023-01-27 19:16:04,927 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_41-trylock_racefree.i [2023-01-27 19:16:06,631 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-01-27 19:16:07,031 INFO L351 CDTParser]: Found 1 translation units. [2023-01-27 19:16:07,032 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_41-trylock_racefree.i [2023-01-27 19:16:07,053 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7a720ac38/43eb46660f754ffaa705172cc92210e6/FLAG2b3f1f6ac [2023-01-27 19:16:07,085 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7a720ac38/43eb46660f754ffaa705172cc92210e6 [2023-01-27 19:16:07,087 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-01-27 19:16:07,091 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2023-01-27 19:16:07,092 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-01-27 19:16:07,092 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-01-27 19:16:07,094 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-01-27 19:16:07,094 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 07:16:07" (1/1) ... [2023-01-27 19:16:07,095 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@54377e0e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:16:07, skipping insertion in model container [2023-01-27 19:16:07,095 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 07:16:07" (1/1) ... [2023-01-27 19:16:07,102 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-01-27 19:16:07,134 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-01-27 19:16:07,606 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_41-trylock_racefree.i[30176,30189] [2023-01-27 19:16:07,626 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-27 19:16:07,663 INFO L203 MainTranslator]: Completed pre-run [2023-01-27 19:16:07,724 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_41-trylock_racefree.i[30176,30189] [2023-01-27 19:16:07,738 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-27 19:16:07,814 INFO L208 MainTranslator]: Completed translation [2023-01-27 19:16:07,814 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:16:07 WrapperNode [2023-01-27 19:16:07,814 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-01-27 19:16:07,815 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-01-27 19:16:07,815 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-01-27 19:16:07,815 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-01-27 19:16:07,837 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:16:07" (1/1) ... [2023-01-27 19:16:07,882 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:16:07" (1/1) ... [2023-01-27 19:16:07,907 INFO L138 Inliner]: procedures = 171, calls = 30, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 77 [2023-01-27 19:16:07,907 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-01-27 19:16:07,908 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-01-27 19:16:07,908 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-01-27 19:16:07,908 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-01-27 19:16:07,916 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:16:07" (1/1) ... [2023-01-27 19:16:07,920 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:16:07" (1/1) ... [2023-01-27 19:16:07,930 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:16:07" (1/1) ... [2023-01-27 19:16:07,931 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:16:07" (1/1) ... [2023-01-27 19:16:07,942 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:16:07" (1/1) ... [2023-01-27 19:16:07,947 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:16:07" (1/1) ... [2023-01-27 19:16:07,951 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:16:07" (1/1) ... [2023-01-27 19:16:07,956 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:16:07" (1/1) ... [2023-01-27 19:16:07,960 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-01-27 19:16:07,962 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-01-27 19:16:07,962 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-01-27 19:16:07,962 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-01-27 19:16:07,963 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:16:07" (1/1) ... [2023-01-27 19:16:07,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-27 19:16:07,975 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 19:16:07,994 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 19:16:08,011 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 19:16:08,026 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-01-27 19:16:08,026 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-01-27 19:16:08,026 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-01-27 19:16:08,026 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-01-27 19:16:08,026 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-01-27 19:16:08,026 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-01-27 19:16:08,026 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-01-27 19:16:08,026 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-01-27 19:16:08,026 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexTryLock [2023-01-27 19:16:08,027 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-01-27 19:16:08,027 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-01-27 19:16:08,027 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-01-27 19:16:08,028 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 19:16:08,236 INFO L236 CfgBuilder]: Building ICFG [2023-01-27 19:16:08,238 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-01-27 19:16:08,586 INFO L277 CfgBuilder]: Performing block encoding [2023-01-27 19:16:08,591 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-01-27 19:16:08,591 INFO L302 CfgBuilder]: Removed 11 assume(true) statements. [2023-01-27 19:16:08,592 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 07:16:08 BoogieIcfgContainer [2023-01-27 19:16:08,601 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-01-27 19:16:08,602 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-01-27 19:16:08,613 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-01-27 19:16:08,615 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-01-27 19:16:08,615 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.01 07:16:07" (1/3) ... [2023-01-27 19:16:08,616 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57a4a678 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 07:16:08, skipping insertion in model container [2023-01-27 19:16:08,616 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:16:07" (2/3) ... [2023-01-27 19:16:08,616 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57a4a678 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 07:16:08, skipping insertion in model container [2023-01-27 19:16:08,616 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 07:16:08" (3/3) ... [2023-01-27 19:16:08,618 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_41-trylock_racefree.i [2023-01-27 19:16:08,642 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-01-27 19:16:08,643 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-01-27 19:16:08,643 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-01-27 19:16:08,790 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-01-27 19:16:08,845 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 92 places, 103 transitions, 214 flow [2023-01-27 19:16:08,908 INFO L130 PetriNetUnfolder]: 21/140 cut-off events. [2023-01-27 19:16:08,908 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-01-27 19:16:08,916 INFO L83 FinitePrefix]: Finished finitePrefix Result has 146 conditions, 140 events. 21/140 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 339 event pairs, 0 based on Foata normal form. 0/114 useless extension candidates. Maximal degree in co-relation 70. Up to 6 conditions per place. [2023-01-27 19:16:08,917 INFO L82 GeneralOperation]: Start removeDead. Operand has 92 places, 103 transitions, 214 flow [2023-01-27 19:16:08,920 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 88 places, 98 transitions, 201 flow [2023-01-27 19:16:08,923 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-27 19:16:08,928 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 88 places, 98 transitions, 201 flow [2023-01-27 19:16:08,942 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 88 places, 98 transitions, 201 flow [2023-01-27 19:16:08,942 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 88 places, 98 transitions, 201 flow [2023-01-27 19:16:08,976 INFO L130 PetriNetUnfolder]: 20/135 cut-off events. [2023-01-27 19:16:08,977 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-27 19:16:08,978 INFO L83 FinitePrefix]: Finished finitePrefix Result has 140 conditions, 135 events. 20/135 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 325 event pairs, 0 based on Foata normal form. 0/109 useless extension candidates. Maximal degree in co-relation 70. Up to 6 conditions per place. [2023-01-27 19:16:08,979 INFO L119 LiptonReduction]: Number of co-enabled transitions 2408 [2023-01-27 19:16:13,308 INFO L134 LiptonReduction]: Checked pairs total: 3879 [2023-01-27 19:16:13,309 INFO L136 LiptonReduction]: Total number of compositions: 78 [2023-01-27 19:16:13,327 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-27 19:16:13,348 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;@513069a7, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-27 19:16:13,349 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-01-27 19:16:13,369 INFO L130 PetriNetUnfolder]: 3/17 cut-off events. [2023-01-27 19:16:13,369 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-27 19:16:13,369 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:16:13,370 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-01-27 19:16:13,371 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:16:13,383 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:16:13,383 INFO L85 PathProgramCache]: Analyzing trace with hash 383557292, now seen corresponding path program 1 times [2023-01-27 19:16:13,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:16:13,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088844189] [2023-01-27 19:16:13,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:16:13,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:16:13,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:16:13,800 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 19:16:13,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:16:13,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088844189] [2023-01-27 19:16:13,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088844189] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 19:16:13,801 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 19:16:13,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-27 19:16:13,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381393352] [2023-01-27 19:16:13,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 19:16:13,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 19:16:13,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:16:13,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 19:16:13,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 19:16:13,836 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 181 [2023-01-27 19:16:13,838 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 32 transitions, 69 flow. Second operand has 3 states, 3 states have (on average 82.33333333333333) internal successors, (247), 3 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 19:16:13,838 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:16:13,838 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 181 [2023-01-27 19:16:13,839 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:16:14,067 INFO L130 PetriNetUnfolder]: 89/209 cut-off events. [2023-01-27 19:16:14,068 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-27 19:16:14,074 INFO L83 FinitePrefix]: Finished finitePrefix Result has 413 conditions, 209 events. 89/209 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 842 event pairs, 0 based on Foata normal form. 20/193 useless extension candidates. Maximal degree in co-relation 384. Up to 180 conditions per place. [2023-01-27 19:16:14,078 INFO L137 encePairwiseOnDemand]: 170/181 looper letters, 23 selfloop transitions, 2 changer transitions 5/33 dead transitions. [2023-01-27 19:16:14,078 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 33 transitions, 131 flow [2023-01-27 19:16:14,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 19:16:14,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 19:16:14,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 288 transitions. [2023-01-27 19:16:14,114 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5303867403314917 [2023-01-27 19:16:14,115 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 288 transitions. [2023-01-27 19:16:14,115 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 288 transitions. [2023-01-27 19:16:14,134 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:16:14,136 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 288 transitions. [2023-01-27 19:16:14,140 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 96.0) internal successors, (288), 3 states have internal predecessors, (288), 0 states have call successors, (0), 0 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 19:16:14,145 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 181.0) internal successors, (724), 4 states have internal predecessors, (724), 0 states have call successors, (0), 0 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 19:16:14,146 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 181.0) internal successors, (724), 4 states have internal predecessors, (724), 0 states have call successors, (0), 0 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 19:16:14,147 INFO L175 Difference]: Start difference. First operand has 26 places, 32 transitions, 69 flow. Second operand 3 states and 288 transitions. [2023-01-27 19:16:14,148 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 33 transitions, 131 flow [2023-01-27 19:16:14,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 33 transitions, 131 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-01-27 19:16:14,151 INFO L231 Difference]: Finished difference. Result has 29 places, 19 transitions, 51 flow [2023-01-27 19:16:14,152 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=53, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=51, PETRI_PLACES=29, PETRI_TRANSITIONS=19} [2023-01-27 19:16:14,162 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 3 predicate places. [2023-01-27 19:16:14,162 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 19 transitions, 51 flow [2023-01-27 19:16:14,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 82.33333333333333) internal successors, (247), 3 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 19:16:14,162 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:16:14,173 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-01-27 19:16:14,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-01-27 19:16:14,174 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:16:14,174 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:16:14,174 INFO L85 PathProgramCache]: Analyzing trace with hash -981753351, now seen corresponding path program 1 times [2023-01-27 19:16:14,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:16:14,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648905224] [2023-01-27 19:16:14,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:16:14,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:16:14,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 19:16:14,246 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-27 19:16:14,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 19:16:14,354 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-27 19:16:14,354 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-27 19:16:14,355 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-01-27 19:16:14,357 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-01-27 19:16:14,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-01-27 19:16:14,358 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-01-27 19:16:14,359 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-27 19:16:14,359 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-01-27 19:16:14,383 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-01-27 19:16:14,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 117 places, 133 transitions, 284 flow [2023-01-27 19:16:14,407 INFO L130 PetriNetUnfolder]: 37/231 cut-off events. [2023-01-27 19:16:14,407 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-01-27 19:16:14,408 INFO L83 FinitePrefix]: Finished finitePrefix Result has 245 conditions, 231 events. 37/231 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 663 event pairs, 0 based on Foata normal form. 0/187 useless extension candidates. Maximal degree in co-relation 142. Up to 9 conditions per place. [2023-01-27 19:16:14,408 INFO L82 GeneralOperation]: Start removeDead. Operand has 117 places, 133 transitions, 284 flow [2023-01-27 19:16:14,410 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 117 places, 133 transitions, 284 flow [2023-01-27 19:16:14,410 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-27 19:16:14,410 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 117 places, 133 transitions, 284 flow [2023-01-27 19:16:14,410 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 117 places, 133 transitions, 284 flow [2023-01-27 19:16:14,410 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 117 places, 133 transitions, 284 flow [2023-01-27 19:16:14,433 INFO L130 PetriNetUnfolder]: 37/231 cut-off events. [2023-01-27 19:16:14,433 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-01-27 19:16:14,434 INFO L83 FinitePrefix]: Finished finitePrefix Result has 245 conditions, 231 events. 37/231 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 663 event pairs, 0 based on Foata normal form. 0/187 useless extension candidates. Maximal degree in co-relation 142. Up to 9 conditions per place. [2023-01-27 19:16:14,448 INFO L119 LiptonReduction]: Number of co-enabled transitions 7000 [2023-01-27 19:16:19,320 INFO L134 LiptonReduction]: Checked pairs total: 14688 [2023-01-27 19:16:19,321 INFO L136 LiptonReduction]: Total number of compositions: 92 [2023-01-27 19:16:19,322 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-27 19:16:19,323 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;@513069a7, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-27 19:16:19,323 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-01-27 19:16:19,325 INFO L130 PetriNetUnfolder]: 2/15 cut-off events. [2023-01-27 19:16:19,325 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-27 19:16:19,325 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:16:19,325 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-01-27 19:16:19,325 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:16:19,325 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:16:19,326 INFO L85 PathProgramCache]: Analyzing trace with hash 626726661, now seen corresponding path program 1 times [2023-01-27 19:16:19,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:16:19,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832845512] [2023-01-27 19:16:19,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:16:19,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:16:19,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:16:19,448 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 19:16:19,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:16:19,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832845512] [2023-01-27 19:16:19,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832845512] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 19:16:19,449 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 19:16:19,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-27 19:16:19,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803967906] [2023-01-27 19:16:19,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 19:16:19,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 19:16:19,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:16:19,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 19:16:19,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 19:16:19,457 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 225 [2023-01-27 19:16:19,457 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 57 transitions, 132 flow. Second operand has 3 states, 3 states have (on average 104.66666666666667) internal successors, (314), 3 states have internal predecessors, (314), 0 states have call successors, (0), 0 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 19:16:19,457 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:16:19,457 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 225 [2023-01-27 19:16:19,458 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:16:20,050 INFO L130 PetriNetUnfolder]: 1665/2829 cut-off events. [2023-01-27 19:16:20,051 INFO L131 PetriNetUnfolder]: For 44/44 co-relation queries the response was YES. [2023-01-27 19:16:20,054 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5563 conditions, 2829 events. 1665/2829 cut-off events. For 44/44 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 15941 event pairs, 1331 based on Foata normal form. 442/2906 useless extension candidates. Maximal degree in co-relation 2459. Up to 2666 conditions per place. [2023-01-27 19:16:20,059 INFO L137 encePairwiseOnDemand]: 208/225 looper letters, 32 selfloop transitions, 2 changer transitions 9/52 dead transitions. [2023-01-27 19:16:20,060 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 52 transitions, 206 flow [2023-01-27 19:16:20,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 19:16:20,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 19:16:20,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 372 transitions. [2023-01-27 19:16:20,076 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5511111111111111 [2023-01-27 19:16:20,076 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 372 transitions. [2023-01-27 19:16:20,077 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 372 transitions. [2023-01-27 19:16:20,077 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:16:20,077 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 372 transitions. [2023-01-27 19:16:20,078 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 124.0) internal successors, (372), 3 states have internal predecessors, (372), 0 states have call successors, (0), 0 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 19:16:20,079 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 225.0) internal successors, (900), 4 states have internal predecessors, (900), 0 states have call successors, (0), 0 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 19:16:20,079 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 225.0) internal successors, (900), 4 states have internal predecessors, (900), 0 states have call successors, (0), 0 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 19:16:20,079 INFO L175 Difference]: Start difference. First operand has 45 places, 57 transitions, 132 flow. Second operand 3 states and 372 transitions. [2023-01-27 19:16:20,079 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 52 transitions, 206 flow [2023-01-27 19:16:20,081 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 52 transitions, 206 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-01-27 19:16:20,081 INFO L231 Difference]: Finished difference. Result has 48 places, 35 transitions, 92 flow [2023-01-27 19:16:20,081 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=225, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=92, PETRI_PLACES=48, PETRI_TRANSITIONS=35} [2023-01-27 19:16:20,082 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 3 predicate places. [2023-01-27 19:16:20,082 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 35 transitions, 92 flow [2023-01-27 19:16:20,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 104.66666666666667) internal successors, (314), 3 states have internal predecessors, (314), 0 states have call successors, (0), 0 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 19:16:20,082 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:16:20,082 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 19:16:20,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-01-27 19:16:20,083 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:16:20,083 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:16:20,083 INFO L85 PathProgramCache]: Analyzing trace with hash 1422392588, now seen corresponding path program 1 times [2023-01-27 19:16:20,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:16:20,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504561606] [2023-01-27 19:16:20,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:16:20,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:16:20,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:16:20,153 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:16:20,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:16:20,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504561606] [2023-01-27 19:16:20,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504561606] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 19:16:20,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795849003] [2023-01-27 19:16:20,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:16:20,155 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:16:20,155 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 19:16:20,157 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 19:16:20,162 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 19:16:20,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:16:20,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 3 conjunts are in the unsatisfiable core [2023-01-27 19:16:20,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 19:16:20,287 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:16:20,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 19:16:20,312 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:16:20,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [795849003] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 19:16:20,313 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 19:16:20,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-01-27 19:16:20,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506690402] [2023-01-27 19:16:20,313 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 19:16:20,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-01-27 19:16:20,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:16:20,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-01-27 19:16:20,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-01-27 19:16:20,315 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 225 [2023-01-27 19:16:20,315 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 35 transitions, 92 flow. Second operand has 7 states, 7 states have (on average 105.42857142857143) internal successors, (738), 7 states have internal predecessors, (738), 0 states have call successors, (0), 0 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 19:16:20,315 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:16:20,315 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 225 [2023-01-27 19:16:20,316 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:16:20,443 INFO L130 PetriNetUnfolder]: 331/671 cut-off events. [2023-01-27 19:16:20,443 INFO L131 PetriNetUnfolder]: For 171/171 co-relation queries the response was YES. [2023-01-27 19:16:20,444 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1509 conditions, 671 events. 331/671 cut-off events. For 171/171 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 3361 event pairs, 50 based on Foata normal form. 80/748 useless extension candidates. Maximal degree in co-relation 1067. Up to 398 conditions per place. [2023-01-27 19:16:20,455 INFO L137 encePairwiseOnDemand]: 222/225 looper letters, 42 selfloop transitions, 3 changer transitions 0/54 dead transitions. [2023-01-27 19:16:20,455 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 54 transitions, 218 flow [2023-01-27 19:16:20,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-27 19:16:20,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-27 19:16:20,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 562 transitions. [2023-01-27 19:16:20,459 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49955555555555553 [2023-01-27 19:16:20,459 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 562 transitions. [2023-01-27 19:16:20,459 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 562 transitions. [2023-01-27 19:16:20,460 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:16:20,460 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 562 transitions. [2023-01-27 19:16:20,461 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 112.4) internal successors, (562), 5 states have internal predecessors, (562), 0 states have call successors, (0), 0 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 19:16:20,463 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 225.0) internal successors, (1350), 6 states have internal predecessors, (1350), 0 states have call successors, (0), 0 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 19:16:20,463 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 225.0) internal successors, (1350), 6 states have internal predecessors, (1350), 0 states have call successors, (0), 0 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 19:16:20,463 INFO L175 Difference]: Start difference. First operand has 48 places, 35 transitions, 92 flow. Second operand 5 states and 562 transitions. [2023-01-27 19:16:20,463 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 54 transitions, 218 flow [2023-01-27 19:16:20,466 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 54 transitions, 214 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-01-27 19:16:20,467 INFO L231 Difference]: Finished difference. Result has 40 places, 30 transitions, 82 flow [2023-01-27 19:16:20,467 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=225, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=82, PETRI_PLACES=40, PETRI_TRANSITIONS=30} [2023-01-27 19:16:20,467 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, -5 predicate places. [2023-01-27 19:16:20,467 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 30 transitions, 82 flow [2023-01-27 19:16:20,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 105.42857142857143) internal successors, (738), 7 states have internal predecessors, (738), 0 states have call successors, (0), 0 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 19:16:20,468 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:16:20,468 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-01-27 19:16:20,492 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-01-27 19:16:20,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:16:20,685 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:16:20,685 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:16:20,685 INFO L85 PathProgramCache]: Analyzing trace with hash 1871727149, now seen corresponding path program 1 times [2023-01-27 19:16:20,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:16:20,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983095045] [2023-01-27 19:16:20,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:16:20,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:16:20,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 19:16:20,696 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-27 19:16:20,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 19:16:20,709 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-27 19:16:20,709 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-27 19:16:20,709 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-01-27 19:16:20,709 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-01-27 19:16:20,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-01-27 19:16:20,709 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-01-27 19:16:20,710 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-27 19:16:20,710 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-01-27 19:16:20,731 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-01-27 19:16:20,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 142 places, 163 transitions, 356 flow [2023-01-27 19:16:20,763 INFO L130 PetriNetUnfolder]: 58/353 cut-off events. [2023-01-27 19:16:20,763 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-01-27 19:16:20,765 INFO L83 FinitePrefix]: Finished finitePrefix Result has 381 conditions, 353 events. 58/353 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1126 event pairs, 1 based on Foata normal form. 0/287 useless extension candidates. Maximal degree in co-relation 239. Up to 16 conditions per place. [2023-01-27 19:16:20,765 INFO L82 GeneralOperation]: Start removeDead. Operand has 142 places, 163 transitions, 356 flow [2023-01-27 19:16:20,767 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 142 places, 163 transitions, 356 flow [2023-01-27 19:16:20,767 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-27 19:16:20,767 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 142 places, 163 transitions, 356 flow [2023-01-27 19:16:20,767 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 142 places, 163 transitions, 356 flow [2023-01-27 19:16:20,768 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 142 places, 163 transitions, 356 flow [2023-01-27 19:16:20,814 INFO L130 PetriNetUnfolder]: 58/353 cut-off events. [2023-01-27 19:16:20,815 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-01-27 19:16:20,816 INFO L83 FinitePrefix]: Finished finitePrefix Result has 381 conditions, 353 events. 58/353 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1126 event pairs, 1 based on Foata normal form. 0/287 useless extension candidates. Maximal degree in co-relation 239. Up to 16 conditions per place. [2023-01-27 19:16:20,833 INFO L119 LiptonReduction]: Number of co-enabled transitions 13104 [2023-01-27 19:16:24,982 INFO L134 LiptonReduction]: Checked pairs total: 29489 [2023-01-27 19:16:24,982 INFO L136 LiptonReduction]: Total number of compositions: 106 [2023-01-27 19:16:24,983 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-27 19:16:24,984 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;@513069a7, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-27 19:16:24,984 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-01-27 19:16:24,985 INFO L130 PetriNetUnfolder]: 4/20 cut-off events. [2023-01-27 19:16:24,985 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-27 19:16:24,985 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:16:24,986 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-01-27 19:16:24,986 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:16:24,986 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:16:24,986 INFO L85 PathProgramCache]: Analyzing trace with hash 911945310, now seen corresponding path program 1 times [2023-01-27 19:16:24,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:16:24,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100745868] [2023-01-27 19:16:24,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:16:24,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:16:24,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:16:25,004 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 19:16:25,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:16:25,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100745868] [2023-01-27 19:16:25,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100745868] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 19:16:25,004 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 19:16:25,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-27 19:16:25,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199384703] [2023-01-27 19:16:25,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 19:16:25,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 19:16:25,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:16:25,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 19:16:25,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 19:16:25,006 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 269 [2023-01-27 19:16:25,007 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 78 transitions, 186 flow. Second operand has 3 states, 3 states have (on average 126.66666666666667) internal successors, (380), 3 states have internal predecessors, (380), 0 states have call successors, (0), 0 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 19:16:25,007 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:16:25,007 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 269 [2023-01-27 19:16:25,007 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:16:28,294 INFO L130 PetriNetUnfolder]: 21048/32110 cut-off events. [2023-01-27 19:16:28,294 INFO L131 PetriNetUnfolder]: For 929/929 co-relation queries the response was YES. [2023-01-27 19:16:28,382 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62405 conditions, 32110 events. 21048/32110 cut-off events. For 929/929 co-relation queries the response was YES. Maximal size of possible extension queue 933. Compared 227898 event pairs, 12977 based on Foata normal form. 5716/34332 useless extension candidates. Maximal degree in co-relation 6327. Up to 29586 conditions per place. [2023-01-27 19:16:28,542 INFO L137 encePairwiseOnDemand]: 245/269 looper letters, 41 selfloop transitions, 2 changer transitions 10/66 dead transitions. [2023-01-27 19:16:28,542 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 66 transitions, 266 flow [2023-01-27 19:16:28,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 19:16:28,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 19:16:28,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 455 transitions. [2023-01-27 19:16:28,544 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.563816604708798 [2023-01-27 19:16:28,544 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 455 transitions. [2023-01-27 19:16:28,544 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 455 transitions. [2023-01-27 19:16:28,544 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:16:28,544 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 455 transitions. [2023-01-27 19:16:28,545 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 151.66666666666666) internal successors, (455), 3 states have internal predecessors, (455), 0 states have call successors, (0), 0 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 19:16:28,548 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 269.0) internal successors, (1076), 4 states have internal predecessors, (1076), 0 states have call successors, (0), 0 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 19:16:28,549 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 269.0) internal successors, (1076), 4 states have internal predecessors, (1076), 0 states have call successors, (0), 0 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 19:16:28,549 INFO L175 Difference]: Start difference. First operand has 60 places, 78 transitions, 186 flow. Second operand 3 states and 455 transitions. [2023-01-27 19:16:28,549 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 66 transitions, 266 flow [2023-01-27 19:16:28,553 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 66 transitions, 266 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-01-27 19:16:28,554 INFO L231 Difference]: Finished difference. Result has 62 places, 47 transitions, 125 flow [2023-01-27 19:16:28,554 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=269, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=125, PETRI_PLACES=62, PETRI_TRANSITIONS=47} [2023-01-27 19:16:28,557 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 2 predicate places. [2023-01-27 19:16:28,557 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 47 transitions, 125 flow [2023-01-27 19:16:28,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 126.66666666666667) internal successors, (380), 3 states have internal predecessors, (380), 0 states have call successors, (0), 0 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 19:16:28,558 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:16:28,558 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 19:16:28,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-01-27 19:16:28,559 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:16:28,559 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:16:28,559 INFO L85 PathProgramCache]: Analyzing trace with hash -1294793156, now seen corresponding path program 1 times [2023-01-27 19:16:28,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:16:28,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514486977] [2023-01-27 19:16:28,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:16:28,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:16:28,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:16:28,630 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:16:28,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:16:28,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514486977] [2023-01-27 19:16:28,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514486977] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 19:16:28,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501868796] [2023-01-27 19:16:28,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:16:28,631 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:16:28,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 19:16:28,632 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 19:16:28,634 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-01-27 19:16:28,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:16:28,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 3 conjunts are in the unsatisfiable core [2023-01-27 19:16:28,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 19:16:28,784 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:16:28,784 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 19:16:28,801 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:16:28,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [501868796] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 19:16:28,802 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 19:16:28,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-01-27 19:16:28,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569505745] [2023-01-27 19:16:28,802 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 19:16:28,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-01-27 19:16:28,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:16:28,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-01-27 19:16:28,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-01-27 19:16:28,805 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 269 [2023-01-27 19:16:28,806 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 47 transitions, 125 flow. Second operand has 7 states, 7 states have (on average 127.42857142857143) internal successors, (892), 7 states have internal predecessors, (892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:16:28,806 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:16:28,806 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 269 [2023-01-27 19:16:28,806 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:16:29,513 INFO L130 PetriNetUnfolder]: 4372/7186 cut-off events. [2023-01-27 19:16:29,513 INFO L131 PetriNetUnfolder]: For 2835/2835 co-relation queries the response was YES. [2023-01-27 19:16:29,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16259 conditions, 7186 events. 4372/7186 cut-off events. For 2835/2835 co-relation queries the response was YES. Maximal size of possible extension queue 259. Compared 47034 event pairs, 504 based on Foata normal form. 657/7807 useless extension candidates. Maximal degree in co-relation 1849. Up to 4122 conditions per place. [2023-01-27 19:16:29,558 INFO L137 encePairwiseOnDemand]: 266/269 looper letters, 75 selfloop transitions, 4 changer transitions 0/92 dead transitions. [2023-01-27 19:16:29,559 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 92 transitions, 373 flow [2023-01-27 19:16:29,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-27 19:16:29,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-27 19:16:29,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 832 transitions. [2023-01-27 19:16:29,595 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5154894671623296 [2023-01-27 19:16:29,595 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 832 transitions. [2023-01-27 19:16:29,595 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 832 transitions. [2023-01-27 19:16:29,595 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:16:29,595 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 832 transitions. [2023-01-27 19:16:29,597 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 138.66666666666666) internal successors, (832), 6 states have internal predecessors, (832), 0 states have call successors, (0), 0 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 19:16:29,599 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 269.0) internal successors, (1883), 7 states have internal predecessors, (1883), 0 states have call successors, (0), 0 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 19:16:29,600 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 269.0) internal successors, (1883), 7 states have internal predecessors, (1883), 0 states have call successors, (0), 0 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 19:16:29,600 INFO L175 Difference]: Start difference. First operand has 62 places, 47 transitions, 125 flow. Second operand 6 states and 832 transitions. [2023-01-27 19:16:29,600 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 92 transitions, 373 flow [2023-01-27 19:16:29,605 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 92 transitions, 365 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-01-27 19:16:29,606 INFO L231 Difference]: Finished difference. Result has 55 places, 43 transitions, 117 flow [2023-01-27 19:16:29,606 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=269, PETRI_DIFFERENCE_MINUEND_FLOW=105, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=117, PETRI_PLACES=55, PETRI_TRANSITIONS=43} [2023-01-27 19:16:29,607 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, -5 predicate places. [2023-01-27 19:16:29,615 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 43 transitions, 117 flow [2023-01-27 19:16:29,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 127.42857142857143) internal successors, (892), 7 states have internal predecessors, (892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:16:29,616 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:16:29,616 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-01-27 19:16:29,628 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-01-27 19:16:29,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-01-27 19:16:29,829 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:16:29,829 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:16:29,829 INFO L85 PathProgramCache]: Analyzing trace with hash 1520084466, now seen corresponding path program 1 times [2023-01-27 19:16:29,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:16:29,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176443033] [2023-01-27 19:16:29,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:16:29,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:16:29,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 19:16:29,861 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-27 19:16:29,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 19:16:29,871 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-27 19:16:29,871 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-27 19:16:29,871 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-01-27 19:16:29,871 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-01-27 19:16:29,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-01-27 19:16:29,872 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-01-27 19:16:29,872 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-27 19:16:29,872 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-01-27 19:16:29,948 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-01-27 19:16:29,949 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 167 places, 193 transitions, 430 flow [2023-01-27 19:16:29,985 INFO L130 PetriNetUnfolder]: 91/539 cut-off events. [2023-01-27 19:16:29,986 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-01-27 19:16:29,989 INFO L83 FinitePrefix]: Finished finitePrefix Result has 594 conditions, 539 events. 91/539 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1993 event pairs, 6 based on Foata normal form. 0/443 useless extension candidates. Maximal degree in co-relation 373. Up to 32 conditions per place. [2023-01-27 19:16:29,989 INFO L82 GeneralOperation]: Start removeDead. Operand has 167 places, 193 transitions, 430 flow [2023-01-27 19:16:29,992 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 167 places, 193 transitions, 430 flow [2023-01-27 19:16:29,992 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-27 19:16:29,992 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 167 places, 193 transitions, 430 flow [2023-01-27 19:16:29,992 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 167 places, 193 transitions, 430 flow [2023-01-27 19:16:29,992 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 167 places, 193 transitions, 430 flow [2023-01-27 19:16:30,025 INFO L130 PetriNetUnfolder]: 91/539 cut-off events. [2023-01-27 19:16:30,025 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-01-27 19:16:30,028 INFO L83 FinitePrefix]: Finished finitePrefix Result has 594 conditions, 539 events. 91/539 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1993 event pairs, 6 based on Foata normal form. 0/443 useless extension candidates. Maximal degree in co-relation 373. Up to 32 conditions per place. [2023-01-27 19:16:30,042 INFO L119 LiptonReduction]: Number of co-enabled transitions 20944 [2023-01-27 19:16:33,761 INFO L134 LiptonReduction]: Checked pairs total: 51303 [2023-01-27 19:16:33,761 INFO L136 LiptonReduction]: Total number of compositions: 121 [2023-01-27 19:16:33,762 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-27 19:16:33,763 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;@513069a7, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-27 19:16:33,763 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-01-27 19:16:33,764 INFO L130 PetriNetUnfolder]: 4/20 cut-off events. [2023-01-27 19:16:33,764 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-27 19:16:33,764 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:16:33,764 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-01-27 19:16:33,764 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:16:33,765 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:16:33,766 INFO L85 PathProgramCache]: Analyzing trace with hash 1240196070, now seen corresponding path program 1 times [2023-01-27 19:16:33,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:16:33,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52425066] [2023-01-27 19:16:33,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:16:33,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:16:33,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:16:33,807 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 19:16:33,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:16:33,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52425066] [2023-01-27 19:16:33,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52425066] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 19:16:33,808 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 19:16:33,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-27 19:16:33,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038707460] [2023-01-27 19:16:33,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 19:16:33,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 19:16:33,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:16:33,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 19:16:33,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 19:16:33,818 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 314 [2023-01-27 19:16:33,818 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 97 transitions, 238 flow. Second operand has 3 states, 3 states have (on average 148.66666666666666) internal successors, (446), 3 states have internal predecessors, (446), 0 states have call successors, (0), 0 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 19:16:33,818 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:16:33,818 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 314 [2023-01-27 19:16:33,818 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:17:09,310 INFO L130 PetriNetUnfolder]: 298317/406719 cut-off events. [2023-01-27 19:17:09,311 INFO L131 PetriNetUnfolder]: For 14730/14730 co-relation queries the response was YES. [2023-01-27 19:17:10,060 INFO L83 FinitePrefix]: Finished finitePrefix Result has 802382 conditions, 406719 events. 298317/406719 cut-off events. For 14730/14730 co-relation queries the response was YES. Maximal size of possible extension queue 8300. Compared 3051715 event pairs, 214660 based on Foata normal form. 65452/440647 useless extension candidates. Maximal degree in co-relation 69542. Up to 387526 conditions per place. [2023-01-27 19:17:11,808 INFO L137 encePairwiseOnDemand]: 284/314 looper letters, 51 selfloop transitions, 2 changer transitions 11/79 dead transitions. [2023-01-27 19:17:11,808 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 79 transitions, 328 flow [2023-01-27 19:17:11,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 19:17:11,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 19:17:11,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 538 transitions. [2023-01-27 19:17:11,810 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5711252653927813 [2023-01-27 19:17:11,810 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 538 transitions. [2023-01-27 19:17:11,810 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 538 transitions. [2023-01-27 19:17:11,810 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:17:11,810 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 538 transitions. [2023-01-27 19:17:11,811 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 179.33333333333334) internal successors, (538), 3 states have internal predecessors, (538), 0 states have call successors, (0), 0 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 19:17:11,814 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 314.0) internal successors, (1256), 4 states have internal predecessors, (1256), 0 states have call successors, (0), 0 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 19:17:11,816 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 314.0) internal successors, (1256), 4 states have internal predecessors, (1256), 0 states have call successors, (0), 0 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 19:17:11,816 INFO L175 Difference]: Start difference. First operand has 74 places, 97 transitions, 238 flow. Second operand 3 states and 538 transitions. [2023-01-27 19:17:11,816 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 79 transitions, 328 flow [2023-01-27 19:17:11,820 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 79 transitions, 328 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-01-27 19:17:11,821 INFO L231 Difference]: Finished difference. Result has 76 places, 59 transitions, 160 flow [2023-01-27 19:17:11,821 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=314, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=160, PETRI_PLACES=76, PETRI_TRANSITIONS=59} [2023-01-27 19:17:11,823 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 2 predicate places. [2023-01-27 19:17:11,823 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 59 transitions, 160 flow [2023-01-27 19:17:11,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 148.66666666666666) internal successors, (446), 3 states have internal predecessors, (446), 0 states have call successors, (0), 0 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 19:17:11,823 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:17:11,823 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 19:17:11,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-01-27 19:17:11,823 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:17:11,824 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:17:11,824 INFO L85 PathProgramCache]: Analyzing trace with hash 692713985, now seen corresponding path program 1 times [2023-01-27 19:17:11,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:17:11,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293821584] [2023-01-27 19:17:11,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:17:11,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:17:11,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:17:11,887 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:17:11,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:17:11,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293821584] [2023-01-27 19:17:11,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293821584] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 19:17:11,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593952456] [2023-01-27 19:17:11,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:17:11,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:17:11,897 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 19:17:11,898 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 19:17:11,900 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-01-27 19:17:11,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:17:11,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 3 conjunts are in the unsatisfiable core [2023-01-27 19:17:11,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 19:17:11,985 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:17:11,985 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 19:17:12,016 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:17:12,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [593952456] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 19:17:12,016 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 19:17:12,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-01-27 19:17:12,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441310110] [2023-01-27 19:17:12,017 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 19:17:12,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-01-27 19:17:12,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:17:12,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-01-27 19:17:12,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-01-27 19:17:12,019 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 314 [2023-01-27 19:17:12,019 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 59 transitions, 160 flow. Second operand has 7 states, 7 states have (on average 149.42857142857142) internal successors, (1046), 7 states have internal predecessors, (1046), 0 states have call successors, (0), 0 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 19:17:12,019 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:17:12,020 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 314 [2023-01-27 19:17:12,020 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:17:26,211 INFO L130 PetriNetUnfolder]: 150148/202498 cut-off events. [2023-01-27 19:17:26,211 INFO L131 PetriNetUnfolder]: For 23139/23139 co-relation queries the response was YES. [2023-01-27 19:17:26,570 INFO L83 FinitePrefix]: Finished finitePrefix Result has 416811 conditions, 202498 events. 150148/202498 cut-off events. For 23139/23139 co-relation queries the response was YES. Maximal size of possible extension queue 4644. Compared 1411740 event pairs, 19242 based on Foata normal form. 729/197386 useless extension candidates. Maximal degree in co-relation 47367. Up to 138268 conditions per place. [2023-01-27 19:17:27,542 INFO L137 encePairwiseOnDemand]: 310/314 looper letters, 121 selfloop transitions, 6 changer transitions 0/142 dead transitions. [2023-01-27 19:17:27,544 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 142 transitions, 584 flow [2023-01-27 19:17:27,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-27 19:17:27,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-27 19:17:27,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1012 transitions. [2023-01-27 19:17:27,557 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5371549893842887 [2023-01-27 19:17:27,557 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1012 transitions. [2023-01-27 19:17:27,557 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1012 transitions. [2023-01-27 19:17:27,557 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:17:27,557 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1012 transitions. [2023-01-27 19:17:27,559 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 168.66666666666666) internal successors, (1012), 6 states have internal predecessors, (1012), 0 states have call successors, (0), 0 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 19:17:27,573 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 314.0) internal successors, (2198), 7 states have internal predecessors, (2198), 0 states have call successors, (0), 0 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 19:17:27,574 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 314.0) internal successors, (2198), 7 states have internal predecessors, (2198), 0 states have call successors, (0), 0 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 19:17:27,574 INFO L175 Difference]: Start difference. First operand has 76 places, 59 transitions, 160 flow. Second operand 6 states and 1012 transitions. [2023-01-27 19:17:27,574 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 142 transitions, 584 flow [2023-01-27 19:17:27,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 142 transitions, 570 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-01-27 19:17:27,854 INFO L231 Difference]: Finished difference. Result has 77 places, 62 transitions, 186 flow [2023-01-27 19:17:27,854 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=314, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=186, PETRI_PLACES=77, PETRI_TRANSITIONS=62} [2023-01-27 19:17:27,855 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 3 predicate places. [2023-01-27 19:17:27,855 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 62 transitions, 186 flow [2023-01-27 19:17:27,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 149.42857142857142) internal successors, (1046), 7 states have internal predecessors, (1046), 0 states have call successors, (0), 0 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 19:17:27,856 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:17:27,856 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2023-01-27 19:17:27,869 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-01-27 19:17:28,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:17:28,064 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:17:28,064 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:17:28,064 INFO L85 PathProgramCache]: Analyzing trace with hash 732234382, now seen corresponding path program 1 times [2023-01-27 19:17:28,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:17:28,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204949496] [2023-01-27 19:17:28,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:17:28,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:17:28,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 19:17:28,076 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-27 19:17:28,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 19:17:28,124 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-27 19:17:28,124 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-27 19:17:28,124 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-01-27 19:17:28,124 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-01-27 19:17:28,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-01-27 19:17:28,124 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-01-27 19:17:28,128 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-27 19:17:28,128 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-01-27 19:17:28,197 INFO L144 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2023-01-27 19:17:28,198 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 192 places, 223 transitions, 506 flow [2023-01-27 19:17:28,337 INFO L130 PetriNetUnfolder]: 152/857 cut-off events. [2023-01-27 19:17:28,337 INFO L131 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2023-01-27 19:17:28,343 INFO L83 FinitePrefix]: Finished finitePrefix Result has 968 conditions, 857 events. 152/857 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 3732 event pairs, 23 based on Foata normal form. 0/715 useless extension candidates. Maximal degree in co-relation 584. Up to 80 conditions per place. [2023-01-27 19:17:28,344 INFO L82 GeneralOperation]: Start removeDead. Operand has 192 places, 223 transitions, 506 flow [2023-01-27 19:17:28,348 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 192 places, 223 transitions, 506 flow [2023-01-27 19:17:28,348 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-27 19:17:28,348 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 192 places, 223 transitions, 506 flow [2023-01-27 19:17:28,349 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 192 places, 223 transitions, 506 flow [2023-01-27 19:17:28,349 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 192 places, 223 transitions, 506 flow [2023-01-27 19:17:28,440 INFO L130 PetriNetUnfolder]: 152/857 cut-off events. [2023-01-27 19:17:28,440 INFO L131 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2023-01-27 19:17:28,447 INFO L83 FinitePrefix]: Finished finitePrefix Result has 968 conditions, 857 events. 152/857 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 3732 event pairs, 23 based on Foata normal form. 0/715 useless extension candidates. Maximal degree in co-relation 584. Up to 80 conditions per place. [2023-01-27 19:17:28,484 INFO L119 LiptonReduction]: Number of co-enabled transitions 30520 [2023-01-27 19:17:31,600 INFO L134 LiptonReduction]: Checked pairs total: 84639 [2023-01-27 19:17:31,601 INFO L136 LiptonReduction]: Total number of compositions: 136 [2023-01-27 19:17:31,602 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-27 19:17:31,602 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;@513069a7, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-27 19:17:31,602 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-01-27 19:17:31,603 INFO L130 PetriNetUnfolder]: 4/19 cut-off events. [2023-01-27 19:17:31,603 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-27 19:17:31,603 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:17:31,603 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-01-27 19:17:31,604 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:17:31,604 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:17:31,604 INFO L85 PathProgramCache]: Analyzing trace with hash 1611032964, now seen corresponding path program 1 times [2023-01-27 19:17:31,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:17:31,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694842594] [2023-01-27 19:17:31,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:17:31,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:17:31,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:17:31,623 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 19:17:31,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:17:31,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694842594] [2023-01-27 19:17:31,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694842594] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 19:17:31,624 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 19:17:31,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-27 19:17:31,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908080756] [2023-01-27 19:17:31,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 19:17:31,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 19:17:31,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:17:31,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 19:17:31,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 19:17:31,625 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 359 [2023-01-27 19:17:31,625 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 116 transitions, 292 flow. Second operand has 3 states, 3 states have (on average 170.66666666666666) internal successors, (512), 3 states have internal predecessors, (512), 0 states have call successors, (0), 0 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 19:17:31,626 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:17:31,626 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 359 [2023-01-27 19:17:31,626 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand