/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/pthread-ext/35_double_lock_p3_vs.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-b8dbc81 [2023-01-27 17:57:29,463 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-01-27 17:57:29,465 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-01-27 17:57:29,497 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-01-27 17:57:29,498 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-01-27 17:57:29,500 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-01-27 17:57:29,502 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-01-27 17:57:29,504 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-01-27 17:57:29,505 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-01-27 17:57:29,508 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-01-27 17:57:29,509 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-01-27 17:57:29,511 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-01-27 17:57:29,511 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-01-27 17:57:29,514 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-01-27 17:57:29,514 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-01-27 17:57:29,515 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-01-27 17:57:29,516 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-01-27 17:57:29,516 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-01-27 17:57:29,518 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-01-27 17:57:29,521 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-01-27 17:57:29,522 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-01-27 17:57:29,523 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-01-27 17:57:29,524 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-01-27 17:57:29,525 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-01-27 17:57:29,530 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-01-27 17:57:29,535 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-01-27 17:57:29,535 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-01-27 17:57:29,536 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-01-27 17:57:29,537 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf [2023-01-27 17:57:29,559 INFO L113 SettingsManager]: Loading preferences was successful [2023-01-27 17:57:29,559 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-01-27 17:57:29,560 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-01-27 17:57:29,560 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-01-27 17:57:29,561 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-01-27 17:57:29,561 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-01-27 17:57:29,561 INFO L138 SettingsManager]: * Use SBE=true [2023-01-27 17:57:29,561 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-01-27 17:57:29,561 INFO L138 SettingsManager]: * sizeof long=4 [2023-01-27 17:57:29,562 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-01-27 17:57:29,562 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-01-27 17:57:29,562 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-01-27 17:57:29,562 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-01-27 17:57:29,562 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-01-27 17:57:29,562 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-01-27 17:57:29,562 INFO L138 SettingsManager]: * sizeof long double=12 [2023-01-27 17:57:29,563 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-01-27 17:57:29,563 INFO L138 SettingsManager]: * Use constant arrays=true [2023-01-27 17:57:29,563 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-01-27 17:57:29,563 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-01-27 17:57:29,563 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-01-27 17:57:29,563 INFO L138 SettingsManager]: * To the following directory=./dump/ [2023-01-27 17:57:29,563 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-01-27 17:57:29,563 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-27 17:57:29,563 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-01-27 17:57:29,563 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-01-27 17:57:29,563 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-01-27 17:57:29,563 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-01-27 17:57:29,564 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-01-27 17:57:29,564 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-01-27 17:57:29,564 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-01-27 17:57:29,564 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-01-27 17:57:29,726 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-01-27 17:57:29,760 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-01-27 17:57:29,762 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-01-27 17:57:29,762 INFO L271 PluginConnector]: Initializing CDTParser... [2023-01-27 17:57:29,763 INFO L275 PluginConnector]: CDTParser initialized [2023-01-27 17:57:29,763 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/35_double_lock_p3_vs.i [2023-01-27 17:57:30,796 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-01-27 17:57:30,953 INFO L351 CDTParser]: Found 1 translation units. [2023-01-27 17:57:30,953 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/35_double_lock_p3_vs.i [2023-01-27 17:57:30,960 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/43d7bbdf9/2e7abd3b3f104683b390917f647e9709/FLAG60046e6e9 [2023-01-27 17:57:30,969 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/43d7bbdf9/2e7abd3b3f104683b390917f647e9709 [2023-01-27 17:57:30,971 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-01-27 17:57:30,972 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2023-01-27 17:57:30,973 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-01-27 17:57:30,973 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-01-27 17:57:30,975 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-01-27 17:57:30,975 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 05:57:30" (1/1) ... [2023-01-27 17:57:30,976 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e2ccf1b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 05:57:30, skipping insertion in model container [2023-01-27 17:57:30,976 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 05:57:30" (1/1) ... [2023-01-27 17:57:30,980 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-01-27 17:57:30,998 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-01-27 17:57:31,160 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/35_double_lock_p3_vs.i[30553,30566] [2023-01-27 17:57:31,167 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-27 17:57:31,187 INFO L203 MainTranslator]: Completed pre-run [2023-01-27 17:57:31,231 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/35_double_lock_p3_vs.i[30553,30566] [2023-01-27 17:57:31,234 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-27 17:57:31,265 INFO L208 MainTranslator]: Completed translation [2023-01-27 17:57:31,266 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 05:57:31 WrapperNode [2023-01-27 17:57:31,266 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-01-27 17:57:31,267 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-01-27 17:57:31,267 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-01-27 17:57:31,268 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-01-27 17:57:31,272 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 05:57:31" (1/1) ... [2023-01-27 17:57:31,296 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 05:57:31" (1/1) ... [2023-01-27 17:57:31,320 INFO L138 Inliner]: procedures = 172, calls = 27, calls flagged for inlining = 11, calls inlined = 15, statements flattened = 126 [2023-01-27 17:57:31,320 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-01-27 17:57:31,321 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-01-27 17:57:31,321 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-01-27 17:57:31,321 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-01-27 17:57:31,327 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 05:57:31" (1/1) ... [2023-01-27 17:57:31,327 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 05:57:31" (1/1) ... [2023-01-27 17:57:31,329 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 05:57:31" (1/1) ... [2023-01-27 17:57:31,329 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 05:57:31" (1/1) ... [2023-01-27 17:57:31,332 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 05:57:31" (1/1) ... [2023-01-27 17:57:31,335 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 05:57:31" (1/1) ... [2023-01-27 17:57:31,336 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 05:57:31" (1/1) ... [2023-01-27 17:57:31,337 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 05:57:31" (1/1) ... [2023-01-27 17:57:31,339 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-01-27 17:57:31,339 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-01-27 17:57:31,340 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-01-27 17:57:31,340 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-01-27 17:57:31,340 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 05:57:31" (1/1) ... [2023-01-27 17:57:31,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-27 17:57:31,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 17:57:31,380 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-01-27 17:57:31,392 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-01-27 17:57:31,407 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-01-27 17:57:31,407 INFO L130 BoogieDeclarations]: Found specification of procedure thr2 [2023-01-27 17:57:31,407 INFO L138 BoogieDeclarations]: Found implementation of procedure thr2 [2023-01-27 17:57:31,407 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-01-27 17:57:31,407 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-01-27 17:57:31,408 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-01-27 17:57:31,408 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-01-27 17:57:31,408 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-01-27 17:57:31,409 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-01-27 17:57:31,409 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-01-27 17:57:31,409 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-01-27 17:57:31,409 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-01-27 17:57:31,410 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-01-27 17:57:31,563 INFO L236 CfgBuilder]: Building ICFG [2023-01-27 17:57:31,565 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-01-27 17:57:31,731 INFO L277 CfgBuilder]: Performing block encoding [2023-01-27 17:57:31,828 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-01-27 17:57:31,829 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-01-27 17:57:31,830 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 05:57:31 BoogieIcfgContainer [2023-01-27 17:57:31,830 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-01-27 17:57:31,832 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-01-27 17:57:31,832 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-01-27 17:57:31,834 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-01-27 17:57:31,834 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.01 05:57:30" (1/3) ... [2023-01-27 17:57:31,834 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5757018f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 05:57:31, skipping insertion in model container [2023-01-27 17:57:31,835 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 05:57:31" (2/3) ... [2023-01-27 17:57:31,835 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5757018f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 05:57:31, skipping insertion in model container [2023-01-27 17:57:31,835 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 05:57:31" (3/3) ... [2023-01-27 17:57:31,839 INFO L112 eAbstractionObserver]: Analyzing ICFG 35_double_lock_p3_vs.i [2023-01-27 17:57:31,851 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-01-27 17:57:31,851 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-01-27 17:57:31,851 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-01-27 17:57:31,891 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-01-27 17:57:31,912 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 77 places, 76 transitions, 162 flow [2023-01-27 17:57:31,938 INFO L130 PetriNetUnfolder]: 6/85 cut-off events. [2023-01-27 17:57:31,938 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-27 17:57:31,943 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93 conditions, 85 events. 6/85 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 122 event pairs, 0 based on Foata normal form. 0/76 useless extension candidates. Maximal degree in co-relation 69. Up to 4 conditions per place. [2023-01-27 17:57:31,943 INFO L82 GeneralOperation]: Start removeDead. Operand has 77 places, 76 transitions, 162 flow [2023-01-27 17:57:31,945 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 76 places, 75 transitions, 158 flow [2023-01-27 17:57:31,948 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-27 17:57:31,954 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 76 places, 75 transitions, 158 flow [2023-01-27 17:57:31,956 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 76 places, 75 transitions, 158 flow [2023-01-27 17:57:31,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 76 places, 75 transitions, 158 flow [2023-01-27 17:57:31,970 INFO L130 PetriNetUnfolder]: 6/85 cut-off events. [2023-01-27 17:57:31,971 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-27 17:57:31,971 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93 conditions, 85 events. 6/85 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 122 event pairs, 0 based on Foata normal form. 0/76 useless extension candidates. Maximal degree in co-relation 69. Up to 4 conditions per place. [2023-01-27 17:57:31,973 INFO L119 LiptonReduction]: Number of co-enabled transitions 1820 [2023-01-27 17:57:33,412 INFO L134 LiptonReduction]: Checked pairs total: 3426 [2023-01-27 17:57:33,412 INFO L136 LiptonReduction]: Total number of compositions: 59 [2023-01-27 17:57:33,423 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-27 17:57:33,428 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;@53359a23, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-27 17:57:33,428 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-01-27 17:57:33,431 INFO L130 PetriNetUnfolder]: 2/12 cut-off events. [2023-01-27 17:57:33,431 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-27 17:57:33,431 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 17:57:33,432 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-01-27 17:57:33,432 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-27 17:57:33,459 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 17:57:33,459 INFO L85 PathProgramCache]: Analyzing trace with hash 460053008, now seen corresponding path program 1 times [2023-01-27 17:57:33,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 17:57:33,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102202402] [2023-01-27 17:57:33,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 17:57:33,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 17:57:33,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 17:57:33,684 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 17:57:33,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 17:57:33,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102202402] [2023-01-27 17:57:33,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102202402] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 17:57:33,685 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 17:57:33,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-01-27 17:57:33,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36479773] [2023-01-27 17:57:33,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 17:57:33,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 17:57:33,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 17:57:33,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 17:57:33,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 17:57:33,721 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 135 [2023-01-27 17:57:33,723 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 24 transitions, 56 flow. Second operand has 3 states, 3 states have (on average 52.333333333333336) internal successors, (157), 3 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:57:33,723 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 17:57:33,723 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 135 [2023-01-27 17:57:33,723 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 17:57:33,835 INFO L130 PetriNetUnfolder]: 232/398 cut-off events. [2023-01-27 17:57:33,835 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-27 17:57:33,836 INFO L83 FinitePrefix]: Finished finitePrefix Result has 809 conditions, 398 events. 232/398 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1416 event pairs, 66 based on Foata normal form. 0/365 useless extension candidates. Maximal degree in co-relation 799. Up to 278 conditions per place. [2023-01-27 17:57:33,839 INFO L137 encePairwiseOnDemand]: 129/135 looper letters, 22 selfloop transitions, 2 changer transitions 0/26 dead transitions. [2023-01-27 17:57:33,839 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 26 transitions, 108 flow [2023-01-27 17:57:33,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 17:57:33,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 17:57:33,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 184 transitions. [2023-01-27 17:57:33,855 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.454320987654321 [2023-01-27 17:57:33,856 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 184 transitions. [2023-01-27 17:57:33,856 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 184 transitions. [2023-01-27 17:57:33,857 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 17:57:33,859 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 184 transitions. [2023-01-27 17:57:33,863 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 61.333333333333336) internal successors, (184), 3 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:57:33,867 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 135.0) internal successors, (540), 4 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:57:33,868 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 135.0) internal successors, (540), 4 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:57:33,869 INFO L175 Difference]: Start difference. First operand has 27 places, 24 transitions, 56 flow. Second operand 3 states and 184 transitions. [2023-01-27 17:57:33,869 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 26 transitions, 108 flow [2023-01-27 17:57:33,871 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 26 transitions, 107 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-01-27 17:57:33,872 INFO L231 Difference]: Finished difference. Result has 27 places, 21 transitions, 57 flow [2023-01-27 17:57:33,873 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=135, PETRI_DIFFERENCE_MINUEND_FLOW=49, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=57, PETRI_PLACES=27, PETRI_TRANSITIONS=21} [2023-01-27 17:57:33,877 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 0 predicate places. [2023-01-27 17:57:33,878 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 21 transitions, 57 flow [2023-01-27 17:57:33,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.333333333333336) internal successors, (157), 3 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:57:33,878 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 17:57:33,878 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-01-27 17:57:33,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-01-27 17:57:33,879 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-27 17:57:33,880 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 17:57:33,880 INFO L85 PathProgramCache]: Analyzing trace with hash 906397124, now seen corresponding path program 1 times [2023-01-27 17:57:33,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 17:57:33,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27177760] [2023-01-27 17:57:33,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 17:57:33,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 17:57:33,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 17:57:33,911 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-27 17:57:33,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 17:57:33,956 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-27 17:57:33,956 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-27 17:57:33,957 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-01-27 17:57:33,958 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-01-27 17:57:33,959 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2023-01-27 17:57:33,959 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2023-01-27 17:57:33,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-01-27 17:57:33,959 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-01-27 17:57:33,962 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-27 17:57:33,962 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-01-27 17:57:33,993 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-01-27 17:57:33,996 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 119 places, 118 transitions, 260 flow [2023-01-27 17:57:34,009 INFO L130 PetriNetUnfolder]: 8/125 cut-off events. [2023-01-27 17:57:34,009 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-27 17:57:34,013 INFO L83 FinitePrefix]: Finished finitePrefix Result has 139 conditions, 125 events. 8/125 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 233 event pairs, 0 based on Foata normal form. 0/113 useless extension candidates. Maximal degree in co-relation 134. Up to 6 conditions per place. [2023-01-27 17:57:34,013 INFO L82 GeneralOperation]: Start removeDead. Operand has 119 places, 118 transitions, 260 flow [2023-01-27 17:57:34,014 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 105 places, 103 transitions, 221 flow [2023-01-27 17:57:34,015 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-27 17:57:34,015 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 105 places, 103 transitions, 221 flow [2023-01-27 17:57:34,016 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 105 places, 103 transitions, 221 flow [2023-01-27 17:57:34,016 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 105 places, 103 transitions, 221 flow [2023-01-27 17:57:34,030 INFO L130 PetriNetUnfolder]: 8/125 cut-off events. [2023-01-27 17:57:34,030 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-27 17:57:34,031 INFO L83 FinitePrefix]: Finished finitePrefix Result has 138 conditions, 125 events. 8/125 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 235 event pairs, 0 based on Foata normal form. 0/113 useless extension candidates. Maximal degree in co-relation 113. Up to 6 conditions per place. [2023-01-27 17:57:34,034 INFO L119 LiptonReduction]: Number of co-enabled transitions 4762 [2023-01-27 17:57:35,670 INFO L134 LiptonReduction]: Checked pairs total: 14107 [2023-01-27 17:57:35,670 INFO L136 LiptonReduction]: Total number of compositions: 72 [2023-01-27 17:57:35,677 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-27 17:57:35,683 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;@53359a23, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-27 17:57:35,683 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-01-27 17:57:35,684 INFO L130 PetriNetUnfolder]: 0/9 cut-off events. [2023-01-27 17:57:35,685 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-27 17:57:35,685 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 17:57:35,685 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-01-27 17:57:35,685 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-01-27 17:57:35,685 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 17:57:35,685 INFO L85 PathProgramCache]: Analyzing trace with hash 681007459, now seen corresponding path program 1 times [2023-01-27 17:57:35,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 17:57:35,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568711716] [2023-01-27 17:57:35,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 17:57:35,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 17:57:35,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 17:57:35,729 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 17:57:35,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 17:57:35,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568711716] [2023-01-27 17:57:35,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568711716] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 17:57:35,730 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 17:57:35,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-01-27 17:57:35,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339607246] [2023-01-27 17:57:35,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 17:57:35,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 17:57:35,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 17:57:35,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 17:57:35,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 17:57:35,731 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 190 [2023-01-27 17:57:35,732 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 42 transitions, 99 flow. Second operand has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 3 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:57:35,732 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 17:57:35,732 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 190 [2023-01-27 17:57:35,732 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 17:57:36,173 INFO L130 PetriNetUnfolder]: 4526/6451 cut-off events. [2023-01-27 17:57:36,174 INFO L131 PetriNetUnfolder]: For 212/212 co-relation queries the response was YES. [2023-01-27 17:57:36,180 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13094 conditions, 6451 events. 4526/6451 cut-off events. For 212/212 co-relation queries the response was YES. Maximal size of possible extension queue 272. Compared 34868 event pairs, 1323 based on Foata normal form. 0/5798 useless extension candidates. Maximal degree in co-relation 13083. Up to 5903 conditions per place. [2023-01-27 17:57:36,201 INFO L137 encePairwiseOnDemand]: 184/190 looper letters, 46 selfloop transitions, 3 changer transitions 0/53 dead transitions. [2023-01-27 17:57:36,201 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 53 transitions, 224 flow [2023-01-27 17:57:36,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 17:57:36,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 17:57:36,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 267 transitions. [2023-01-27 17:57:36,205 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46842105263157896 [2023-01-27 17:57:36,205 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 267 transitions. [2023-01-27 17:57:36,205 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 267 transitions. [2023-01-27 17:57:36,206 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 17:57:36,206 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 267 transitions. [2023-01-27 17:57:36,207 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 89.0) internal successors, (267), 3 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:57:36,210 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 190.0) internal successors, (760), 4 states have internal predecessors, (760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:57:36,210 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 190.0) internal successors, (760), 4 states have internal predecessors, (760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:57:36,210 INFO L175 Difference]: Start difference. First operand has 47 places, 42 transitions, 99 flow. Second operand 3 states and 267 transitions. [2023-01-27 17:57:36,211 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 53 transitions, 224 flow [2023-01-27 17:57:36,212 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 53 transitions, 221 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-01-27 17:57:36,213 INFO L231 Difference]: Finished difference. Result has 47 places, 42 transitions, 111 flow [2023-01-27 17:57:36,213 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=190, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=111, PETRI_PLACES=47, PETRI_TRANSITIONS=42} [2023-01-27 17:57:36,214 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 0 predicate places. [2023-01-27 17:57:36,214 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 42 transitions, 111 flow [2023-01-27 17:57:36,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 3 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:57:36,214 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 17:57:36,215 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 17:57:36,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-01-27 17:57:36,215 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-01-27 17:57:36,215 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 17:57:36,215 INFO L85 PathProgramCache]: Analyzing trace with hash -226819370, now seen corresponding path program 1 times [2023-01-27 17:57:36,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 17:57:36,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574690152] [2023-01-27 17:57:36,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 17:57:36,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 17:57:36,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 17:57:36,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 17:57:36,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 17:57:36,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574690152] [2023-01-27 17:57:36,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574690152] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 17:57:36,329 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 17:57:36,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-01-27 17:57:36,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515237272] [2023-01-27 17:57:36,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 17:57:36,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-27 17:57:36,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 17:57:36,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-27 17:57:36,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-01-27 17:57:36,331 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 190 [2023-01-27 17:57:36,331 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 42 transitions, 111 flow. Second operand has 5 states, 5 states have (on average 71.0) internal successors, (355), 5 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:57:36,331 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 17:57:36,331 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 190 [2023-01-27 17:57:36,331 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 17:57:36,922 INFO L130 PetriNetUnfolder]: 5404/7701 cut-off events. [2023-01-27 17:57:36,923 INFO L131 PetriNetUnfolder]: For 806/806 co-relation queries the response was YES. [2023-01-27 17:57:36,929 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16386 conditions, 7701 events. 5404/7701 cut-off events. For 806/806 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 43861 event pairs, 1265 based on Foata normal form. 56/7456 useless extension candidates. Maximal degree in co-relation 16373. Up to 5835 conditions per place. [2023-01-27 17:57:36,960 INFO L137 encePairwiseOnDemand]: 180/190 looper letters, 95 selfloop transitions, 17 changer transitions 0/116 dead transitions. [2023-01-27 17:57:36,960 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 116 transitions, 514 flow [2023-01-27 17:57:36,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-01-27 17:57:36,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-01-27 17:57:36,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 597 transitions. [2023-01-27 17:57:36,962 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4488721804511278 [2023-01-27 17:57:36,962 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 597 transitions. [2023-01-27 17:57:36,962 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 597 transitions. [2023-01-27 17:57:36,963 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 17:57:36,963 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 597 transitions. [2023-01-27 17:57:36,964 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 85.28571428571429) internal successors, (597), 7 states have internal predecessors, (597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:57:36,966 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 190.0) internal successors, (1520), 8 states have internal predecessors, (1520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:57:36,966 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 190.0) internal successors, (1520), 8 states have internal predecessors, (1520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:57:36,967 INFO L175 Difference]: Start difference. First operand has 47 places, 42 transitions, 111 flow. Second operand 7 states and 597 transitions. [2023-01-27 17:57:36,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 116 transitions, 514 flow [2023-01-27 17:57:36,968 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 116 transitions, 510 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-01-27 17:57:36,969 INFO L231 Difference]: Finished difference. Result has 56 places, 56 transitions, 227 flow [2023-01-27 17:57:36,969 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=190, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=227, PETRI_PLACES=56, PETRI_TRANSITIONS=56} [2023-01-27 17:57:36,970 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 9 predicate places. [2023-01-27 17:57:36,970 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 56 transitions, 227 flow [2023-01-27 17:57:36,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 71.0) internal successors, (355), 5 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:57:36,970 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 17:57:36,970 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 17:57:36,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-01-27 17:57:36,971 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-01-27 17:57:36,971 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 17:57:36,971 INFO L85 PathProgramCache]: Analyzing trace with hash 1069921046, now seen corresponding path program 1 times [2023-01-27 17:57:36,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 17:57:36,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575143809] [2023-01-27 17:57:36,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 17:57:36,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 17:57:36,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 17:57:37,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 17:57:37,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 17:57:37,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575143809] [2023-01-27 17:57:37,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575143809] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 17:57:37,031 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 17:57:37,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-01-27 17:57:37,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224383836] [2023-01-27 17:57:37,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 17:57:37,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-01-27 17:57:37,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 17:57:37,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-01-27 17:57:37,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-01-27 17:57:37,033 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 190 [2023-01-27 17:57:37,033 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 56 transitions, 227 flow. Second operand has 7 states, 7 states have (on average 69.71428571428571) internal successors, (488), 7 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:57:37,033 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 17:57:37,034 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 190 [2023-01-27 17:57:37,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 17:57:37,873 INFO L130 PetriNetUnfolder]: 6440/9205 cut-off events. [2023-01-27 17:57:37,873 INFO L131 PetriNetUnfolder]: For 4502/4502 co-relation queries the response was YES. [2023-01-27 17:57:37,884 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23027 conditions, 9205 events. 6440/9205 cut-off events. For 4502/4502 co-relation queries the response was YES. Maximal size of possible extension queue 443. Compared 54805 event pairs, 883 based on Foata normal form. 112/9024 useless extension candidates. Maximal degree in co-relation 23009. Up to 5369 conditions per place. [2023-01-27 17:57:37,921 INFO L137 encePairwiseOnDemand]: 179/190 looper letters, 126 selfloop transitions, 23 changer transitions 0/153 dead transitions. [2023-01-27 17:57:37,921 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 153 transitions, 798 flow [2023-01-27 17:57:37,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-01-27 17:57:37,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-01-27 17:57:37,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 762 transitions. [2023-01-27 17:57:37,923 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4456140350877193 [2023-01-27 17:57:37,923 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 762 transitions. [2023-01-27 17:57:37,924 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 762 transitions. [2023-01-27 17:57:37,924 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 17:57:37,924 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 762 transitions. [2023-01-27 17:57:37,925 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 84.66666666666667) internal successors, (762), 9 states have internal predecessors, (762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:57:37,927 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 190.0) internal successors, (1900), 10 states have internal predecessors, (1900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:57:37,928 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 190.0) internal successors, (1900), 10 states have internal predecessors, (1900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:57:37,929 INFO L175 Difference]: Start difference. First operand has 56 places, 56 transitions, 227 flow. Second operand 9 states and 762 transitions. [2023-01-27 17:57:37,929 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 153 transitions, 798 flow [2023-01-27 17:57:37,942 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 153 transitions, 790 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-01-27 17:57:37,944 INFO L231 Difference]: Finished difference. Result has 65 places, 62 transitions, 321 flow [2023-01-27 17:57:37,945 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=190, PETRI_DIFFERENCE_MINUEND_FLOW=219, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=321, PETRI_PLACES=65, PETRI_TRANSITIONS=62} [2023-01-27 17:57:37,946 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 18 predicate places. [2023-01-27 17:57:37,946 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 62 transitions, 321 flow [2023-01-27 17:57:37,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 69.71428571428571) internal successors, (488), 7 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:57:37,947 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 17:57:37,947 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2023-01-27 17:57:37,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-01-27 17:57:37,947 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-01-27 17:57:37,948 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 17:57:37,948 INFO L85 PathProgramCache]: Analyzing trace with hash 1848916684, now seen corresponding path program 1 times [2023-01-27 17:57:37,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 17:57:37,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269761770] [2023-01-27 17:57:37,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 17:57:37,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 17:57:37,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 17:57:37,959 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-27 17:57:37,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 17:57:37,979 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-27 17:57:37,979 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-27 17:57:37,979 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2023-01-27 17:57:37,979 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2023-01-27 17:57:37,979 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 5 remaining) [2023-01-27 17:57:37,979 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2023-01-27 17:57:37,980 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2023-01-27 17:57:37,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-01-27 17:57:37,980 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-01-27 17:57:37,980 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-27 17:57:37,980 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-01-27 17:57:38,022 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-01-27 17:57:38,027 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 161 places, 160 transitions, 362 flow [2023-01-27 17:57:38,040 INFO L130 PetriNetUnfolder]: 10/165 cut-off events. [2023-01-27 17:57:38,041 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-01-27 17:57:38,041 INFO L83 FinitePrefix]: Finished finitePrefix Result has 186 conditions, 165 events. 10/165 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 389 event pairs, 0 based on Foata normal form. 0/150 useless extension candidates. Maximal degree in co-relation 179. Up to 8 conditions per place. [2023-01-27 17:57:38,041 INFO L82 GeneralOperation]: Start removeDead. Operand has 161 places, 160 transitions, 362 flow [2023-01-27 17:57:38,042 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 134 places, 131 transitions, 286 flow [2023-01-27 17:57:38,042 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-27 17:57:38,042 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 134 places, 131 transitions, 286 flow [2023-01-27 17:57:38,043 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 134 places, 131 transitions, 286 flow [2023-01-27 17:57:38,043 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 134 places, 131 transitions, 286 flow [2023-01-27 17:57:38,054 INFO L130 PetriNetUnfolder]: 10/165 cut-off events. [2023-01-27 17:57:38,054 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-01-27 17:57:38,055 INFO L83 FinitePrefix]: Finished finitePrefix Result has 184 conditions, 165 events. 10/165 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 391 event pairs, 0 based on Foata normal form. 0/150 useless extension candidates. Maximal degree in co-relation 158. Up to 8 conditions per place. [2023-01-27 17:57:38,058 INFO L119 LiptonReduction]: Number of co-enabled transitions 9216 [2023-01-27 17:57:39,809 INFO L134 LiptonReduction]: Checked pairs total: 26169 [2023-01-27 17:57:39,810 INFO L136 LiptonReduction]: Total number of compositions: 88 [2023-01-27 17:57:39,818 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-27 17:57:39,819 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;@53359a23, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-27 17:57:39,819 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-01-27 17:57:39,820 INFO L130 PetriNetUnfolder]: 0/9 cut-off events. [2023-01-27 17:57:39,820 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-27 17:57:39,820 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 17:57:39,820 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-01-27 17:57:39,820 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2023-01-27 17:57:39,856 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 17:57:39,856 INFO L85 PathProgramCache]: Analyzing trace with hash 957231032, now seen corresponding path program 1 times [2023-01-27 17:57:39,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 17:57:39,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661558886] [2023-01-27 17:57:39,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 17:57:39,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 17:57:39,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 17:57:39,892 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 17:57:39,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 17:57:39,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661558886] [2023-01-27 17:57:39,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661558886] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 17:57:39,893 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 17:57:39,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-01-27 17:57:39,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780454859] [2023-01-27 17:57:39,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 17:57:39,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 17:57:39,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 17:57:39,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 17:57:39,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 17:57:39,894 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 248 [2023-01-27 17:57:39,894 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 56 transitions, 136 flow. Second operand has 3 states, 3 states have (on average 92.33333333333333) internal successors, (277), 3 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:57:39,895 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 17:57:39,895 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 248 [2023-01-27 17:57:39,895 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 17:57:46,214 INFO L130 PetriNetUnfolder]: 82862/107175 cut-off events. [2023-01-27 17:57:46,215 INFO L131 PetriNetUnfolder]: For 5524/5524 co-relation queries the response was YES. [2023-01-27 17:57:46,354 INFO L83 FinitePrefix]: Finished finitePrefix Result has 217983 conditions, 107175 events. 82862/107175 cut-off events. For 5524/5524 co-relation queries the response was YES. Maximal size of possible extension queue 2968. Compared 636885 event pairs, 29321 based on Foata normal form. 0/96864 useless extension candidates. Maximal degree in co-relation 217971. Up to 104467 conditions per place. [2023-01-27 17:57:46,740 INFO L137 encePairwiseOnDemand]: 241/248 looper letters, 64 selfloop transitions, 4 changer transitions 0/72 dead transitions. [2023-01-27 17:57:46,740 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 72 transitions, 316 flow [2023-01-27 17:57:46,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 17:57:46,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 17:57:46,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 346 transitions. [2023-01-27 17:57:46,745 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4650537634408602 [2023-01-27 17:57:46,745 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 346 transitions. [2023-01-27 17:57:46,745 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 346 transitions. [2023-01-27 17:57:46,746 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 17:57:46,746 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 346 transitions. [2023-01-27 17:57:46,746 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 115.33333333333333) internal successors, (346), 3 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:57:46,747 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 248.0) internal successors, (992), 4 states have internal predecessors, (992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:57:46,748 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 248.0) internal successors, (992), 4 states have internal predecessors, (992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:57:46,748 INFO L175 Difference]: Start difference. First operand has 62 places, 56 transitions, 136 flow. Second operand 3 states and 346 transitions. [2023-01-27 17:57:46,748 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 72 transitions, 316 flow [2023-01-27 17:57:46,750 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 72 transitions, 307 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-01-27 17:57:46,751 INFO L231 Difference]: Finished difference. Result has 62 places, 57 transitions, 151 flow [2023-01-27 17:57:46,751 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=125, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=151, PETRI_PLACES=62, PETRI_TRANSITIONS=57} [2023-01-27 17:57:46,753 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, 0 predicate places. [2023-01-27 17:57:46,753 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 57 transitions, 151 flow [2023-01-27 17:57:46,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 92.33333333333333) internal successors, (277), 3 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:57:46,754 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 17:57:46,754 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 17:57:46,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-01-27 17:57:46,754 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2023-01-27 17:57:46,755 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 17:57:46,755 INFO L85 PathProgramCache]: Analyzing trace with hash 596529296, now seen corresponding path program 1 times [2023-01-27 17:57:46,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 17:57:46,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012456873] [2023-01-27 17:57:46,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 17:57:46,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 17:57:46,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 17:57:46,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 17:57:46,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 17:57:46,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012456873] [2023-01-27 17:57:46,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012456873] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 17:57:46,811 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 17:57:46,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-01-27 17:57:46,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005776510] [2023-01-27 17:57:46,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 17:57:46,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-27 17:57:46,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 17:57:46,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-27 17:57:46,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-01-27 17:57:46,813 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 248 [2023-01-27 17:57:46,813 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 57 transitions, 151 flow. Second operand has 5 states, 5 states have (on average 91.0) internal successors, (455), 5 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 17:57:46,813 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 17:57:46,813 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 248 [2023-01-27 17:57:46,813 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 17:57:55,077 INFO L130 PetriNetUnfolder]: 105304/136309 cut-off events. [2023-01-27 17:57:55,090 INFO L131 PetriNetUnfolder]: For 15164/15164 co-relation queries the response was YES. [2023-01-27 17:57:55,469 INFO L83 FinitePrefix]: Finished finitePrefix Result has 289569 conditions, 136309 events. 105304/136309 cut-off events. For 15164/15164 co-relation queries the response was YES. Maximal size of possible extension queue 4049. Compared 843724 event pairs, 30707 based on Foata normal form. 732/130684 useless extension candidates. Maximal degree in co-relation 289555. Up to 107547 conditions per place. [2023-01-27 17:57:56,109 INFO L137 encePairwiseOnDemand]: 234/248 looper letters, 155 selfloop transitions, 27 changer transitions 0/186 dead transitions. [2023-01-27 17:57:56,110 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 186 transitions, 840 flow [2023-01-27 17:57:56,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-01-27 17:57:56,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-01-27 17:57:56,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 807 transitions. [2023-01-27 17:57:56,112 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46486175115207373 [2023-01-27 17:57:56,112 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 807 transitions. [2023-01-27 17:57:56,112 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 807 transitions. [2023-01-27 17:57:56,112 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 17:57:56,112 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 807 transitions. [2023-01-27 17:57:56,113 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 115.28571428571429) internal successors, (807), 7 states have internal predecessors, (807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:57:56,115 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 248.0) internal successors, (1984), 8 states have internal predecessors, (1984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:57:56,115 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 248.0) internal successors, (1984), 8 states have internal predecessors, (1984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:57:56,116 INFO L175 Difference]: Start difference. First operand has 62 places, 57 transitions, 151 flow. Second operand 7 states and 807 transitions. [2023-01-27 17:57:56,116 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 186 transitions, 840 flow [2023-01-27 17:57:56,129 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 186 transitions, 834 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-01-27 17:57:56,131 INFO L231 Difference]: Finished difference. Result has 71 places, 80 transitions, 342 flow [2023-01-27 17:57:56,131 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=147, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=342, PETRI_PLACES=71, PETRI_TRANSITIONS=80} [2023-01-27 17:57:56,131 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, 9 predicate places. [2023-01-27 17:57:56,131 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 80 transitions, 342 flow [2023-01-27 17:57:56,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 91.0) internal successors, (455), 5 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 17:57:56,132 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 17:57:56,132 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 17:57:56,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-01-27 17:57:56,132 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2023-01-27 17:57:56,132 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 17:57:56,132 INFO L85 PathProgramCache]: Analyzing trace with hash 2034031899, now seen corresponding path program 1 times [2023-01-27 17:57:56,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 17:57:56,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93903915] [2023-01-27 17:57:56,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 17:57:56,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 17:57:56,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 17:57:56,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 17:57:56,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 17:57:56,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93903915] [2023-01-27 17:57:56,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93903915] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 17:57:56,173 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 17:57:56,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-01-27 17:57:56,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908959344] [2023-01-27 17:57:56,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 17:57:56,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-01-27 17:57:56,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 17:57:56,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-01-27 17:57:56,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-01-27 17:57:56,174 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 248 [2023-01-27 17:57:56,175 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 80 transitions, 342 flow. Second operand has 6 states, 6 states have (on average 90.0) internal successors, (540), 6 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:57:56,175 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 17:57:56,175 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 248 [2023-01-27 17:57:56,175 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 17:58:08,321 INFO L130 PetriNetUnfolder]: 138528/180009 cut-off events. [2023-01-27 17:58:08,321 INFO L131 PetriNetUnfolder]: For 99410/99410 co-relation queries the response was YES. [2023-01-27 17:58:08,746 INFO L83 FinitePrefix]: Finished finitePrefix Result has 461818 conditions, 180009 events. 138528/180009 cut-off events. For 99410/99410 co-relation queries the response was YES. Maximal size of possible extension queue 5540. Compared 1167664 event pairs, 35899 based on Foata normal form. 1464/173652 useless extension candidates. Maximal degree in co-relation 461799. Up to 108879 conditions per place. [2023-01-27 17:58:09,405 INFO L137 encePairwiseOnDemand]: 232/248 looper letters, 225 selfloop transitions, 47 changer transitions 0/276 dead transitions. [2023-01-27 17:58:09,405 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 276 transitions, 1496 flow [2023-01-27 17:58:09,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-01-27 17:58:09,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-01-27 17:58:09,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1064 transitions. [2023-01-27 17:58:09,407 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4767025089605735 [2023-01-27 17:58:09,407 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1064 transitions. [2023-01-27 17:58:09,407 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1064 transitions. [2023-01-27 17:58:09,408 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 17:58:09,408 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1064 transitions. [2023-01-27 17:58:09,409 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 118.22222222222223) internal successors, (1064), 9 states have internal predecessors, (1064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:58:09,412 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 248.0) internal successors, (2480), 10 states have internal predecessors, (2480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:58:09,412 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 248.0) internal successors, (2480), 10 states have internal predecessors, (2480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:58:09,412 INFO L175 Difference]: Start difference. First operand has 71 places, 80 transitions, 342 flow. Second operand 9 states and 1064 transitions. [2023-01-27 17:58:09,412 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 276 transitions, 1496 flow [2023-01-27 17:58:09,806 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 276 transitions, 1482 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-01-27 17:58:09,807 INFO L231 Difference]: Finished difference. Result has 81 places, 100 transitions, 621 flow [2023-01-27 17:58:09,808 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=328, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=621, PETRI_PLACES=81, PETRI_TRANSITIONS=100} [2023-01-27 17:58:09,808 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, 19 predicate places. [2023-01-27 17:58:09,808 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 100 transitions, 621 flow [2023-01-27 17:58:09,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 90.0) internal successors, (540), 6 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:58:09,809 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 17:58:09,809 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 17:58:09,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-01-27 17:58:09,809 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2023-01-27 17:58:09,809 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 17:58:09,809 INFO L85 PathProgramCache]: Analyzing trace with hash 326842020, now seen corresponding path program 1 times [2023-01-27 17:58:09,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 17:58:09,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863343511] [2023-01-27 17:58:09,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 17:58:09,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 17:58:09,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 17:58:09,845 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 17:58:09,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 17:58:09,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863343511] [2023-01-27 17:58:09,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863343511] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 17:58:09,846 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 17:58:09,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-01-27 17:58:09,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33572289] [2023-01-27 17:58:09,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 17:58:09,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-27 17:58:09,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 17:58:09,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-27 17:58:09,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-01-27 17:58:09,847 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 248 [2023-01-27 17:58:09,847 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 100 transitions, 621 flow. Second operand has 5 states, 5 states have (on average 91.2) internal successors, (456), 5 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:58:09,848 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 17:58:09,848 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 248 [2023-01-27 17:58:09,848 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 17:58:24,982 INFO L130 PetriNetUnfolder]: 160652/208485 cut-off events. [2023-01-27 17:58:24,983 INFO L131 PetriNetUnfolder]: For 323498/323498 co-relation queries the response was YES. [2023-01-27 17:58:25,588 INFO L83 FinitePrefix]: Finished finitePrefix Result has 641646 conditions, 208485 events. 160652/208485 cut-off events. For 323498/323498 co-relation queries the response was YES. Maximal size of possible extension queue 6696. Compared 1379404 event pairs, 41963 based on Foata normal form. 920/201354 useless extension candidates. Maximal degree in co-relation 641623. Up to 180157 conditions per place. [2023-01-27 17:58:26,618 INFO L137 encePairwiseOnDemand]: 235/248 looper letters, 196 selfloop transitions, 26 changer transitions 0/226 dead transitions. [2023-01-27 17:58:26,619 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 226 transitions, 1701 flow [2023-01-27 17:58:26,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-27 17:58:26,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-27 17:58:26,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 682 transitions. [2023-01-27 17:58:26,621 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2023-01-27 17:58:26,621 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 682 transitions. [2023-01-27 17:58:26,621 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 682 transitions. [2023-01-27 17:58:26,621 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 17:58:26,621 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 682 transitions. [2023-01-27 17:58:26,622 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 113.66666666666667) internal successors, (682), 6 states have internal predecessors, (682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:58:26,624 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 248.0) internal successors, (1736), 7 states have internal predecessors, (1736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:58:26,624 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 248.0) internal successors, (1736), 7 states have internal predecessors, (1736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:58:26,624 INFO L175 Difference]: Start difference. First operand has 81 places, 100 transitions, 621 flow. Second operand 6 states and 682 transitions. [2023-01-27 17:58:26,624 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 226 transitions, 1701 flow [2023-01-27 17:58:27,904 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 226 transitions, 1523 flow, removed 56 selfloop flow, removed 4 redundant places. [2023-01-27 17:58:27,906 INFO L231 Difference]: Finished difference. Result has 85 places, 120 transitions, 782 flow [2023-01-27 17:58:27,906 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=516, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=782, PETRI_PLACES=85, PETRI_TRANSITIONS=120} [2023-01-27 17:58:27,906 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, 23 predicate places. [2023-01-27 17:58:27,906 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 120 transitions, 782 flow [2023-01-27 17:58:27,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 91.2) internal successors, (456), 5 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:58:27,907 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 17:58:27,907 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 17:58:27,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-01-27 17:58:27,907 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2023-01-27 17:58:27,907 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 17:58:27,907 INFO L85 PathProgramCache]: Analyzing trace with hash 562489667, now seen corresponding path program 1 times [2023-01-27 17:58:27,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 17:58:27,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893683709] [2023-01-27 17:58:27,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 17:58:27,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 17:58:27,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 17:58:27,953 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 17:58:27,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 17:58:27,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893683709] [2023-01-27 17:58:27,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893683709] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 17:58:27,953 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 17:58:27,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-01-27 17:58:27,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847690164] [2023-01-27 17:58:27,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 17:58:27,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-01-27 17:58:27,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 17:58:27,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-01-27 17:58:27,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-01-27 17:58:27,955 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 248 [2023-01-27 17:58:27,955 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 120 transitions, 782 flow. Second operand has 6 states, 6 states have (on average 90.16666666666667) internal successors, (541), 6 states have internal predecessors, (541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:58:27,955 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 17:58:27,955 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 248 [2023-01-27 17:58:27,955 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 17:58:49,537 INFO L130 PetriNetUnfolder]: 207840/270219 cut-off events. [2023-01-27 17:58:49,538 INFO L131 PetriNetUnfolder]: For 550604/550604 co-relation queries the response was YES. [2023-01-27 17:58:50,544 INFO L83 FinitePrefix]: Finished finitePrefix Result has 865377 conditions, 270219 events. 207840/270219 cut-off events. For 550604/550604 co-relation queries the response was YES. Maximal size of possible extension queue 8989. Compared 1849249 event pairs, 51829 based on Foata normal form. 1904/262543 useless extension candidates. Maximal degree in co-relation 865349. Up to 182521 conditions per place. [2023-01-27 17:58:52,004 INFO L137 encePairwiseOnDemand]: 232/248 looper letters, 318 selfloop transitions, 65 changer transitions 0/387 dead transitions. [2023-01-27 17:58:52,005 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 387 transitions, 2817 flow [2023-01-27 17:58:52,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-01-27 17:58:52,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-01-27 17:58:52,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1059 transitions. [2023-01-27 17:58:52,033 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47446236559139787 [2023-01-27 17:58:52,033 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1059 transitions. [2023-01-27 17:58:52,033 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1059 transitions. [2023-01-27 17:58:52,034 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 17:58:52,034 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1059 transitions. [2023-01-27 17:58:52,036 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 117.66666666666667) internal successors, (1059), 9 states have internal predecessors, (1059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:58:52,038 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 248.0) internal successors, (2480), 10 states have internal predecessors, (2480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:58:52,038 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 248.0) internal successors, (2480), 10 states have internal predecessors, (2480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:58:52,038 INFO L175 Difference]: Start difference. First operand has 85 places, 120 transitions, 782 flow. Second operand 9 states and 1059 transitions. [2023-01-27 17:58:52,038 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 387 transitions, 2817 flow [2023-01-27 17:58:55,046 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 387 transitions, 2696 flow, removed 48 selfloop flow, removed 1 redundant places. [2023-01-27 17:58:55,049 INFO L231 Difference]: Finished difference. Result has 96 places, 159 transitions, 1279 flow [2023-01-27 17:58:55,049 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=715, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1279, PETRI_PLACES=96, PETRI_TRANSITIONS=159} [2023-01-27 17:58:55,050 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, 34 predicate places. [2023-01-27 17:58:55,050 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 159 transitions, 1279 flow [2023-01-27 17:58:55,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 90.16666666666667) internal successors, (541), 6 states have internal predecessors, (541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:58:55,050 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 17:58:55,050 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 17:58:55,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-01-27 17:58:55,050 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2023-01-27 17:58:55,051 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 17:58:55,051 INFO L85 PathProgramCache]: Analyzing trace with hash -1481009839, now seen corresponding path program 1 times [2023-01-27 17:58:55,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 17:58:55,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530101829] [2023-01-27 17:58:55,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 17:58:55,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 17:58:55,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 17:58:55,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 17:58:55,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 17:58:55,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530101829] [2023-01-27 17:58:55,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530101829] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 17:58:55,119 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 17:58:55,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-01-27 17:58:55,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713790824] [2023-01-27 17:58:55,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 17:58:55,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-01-27 17:58:55,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 17:58:55,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-01-27 17:58:55,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-01-27 17:58:55,121 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 248 [2023-01-27 17:58:55,121 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 159 transitions, 1279 flow. Second operand has 8 states, 8 states have (on average 89.0) internal successors, (712), 8 states have internal predecessors, (712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:58:55,121 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 17:58:55,121 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 248 [2023-01-27 17:58:55,121 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 17:59:36,696 INFO L130 PetriNetUnfolder]: 342038/444067 cut-off events. [2023-01-27 17:59:36,696 INFO L131 PetriNetUnfolder]: For 1780230/1780230 co-relation queries the response was YES. [2023-01-27 17:59:38,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1566340 conditions, 444067 events. 342038/444067 cut-off events. For 1780230/1780230 co-relation queries the response was YES. Maximal size of possible extension queue 14423. Compared 3191210 event pairs, 42653 based on Foata normal form. 7720/436964 useless extension candidates. Maximal degree in co-relation 1566307. Up to 187991 conditions per place. [2023-01-27 17:59:40,975 INFO L137 encePairwiseOnDemand]: 228/248 looper letters, 510 selfloop transitions, 232 changer transitions 0/746 dead transitions. [2023-01-27 17:59:40,976 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 746 transitions, 6728 flow [2023-01-27 17:59:40,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-01-27 17:59:40,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-01-27 17:59:40,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1790 transitions. [2023-01-27 17:59:40,979 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48118279569892475 [2023-01-27 17:59:40,979 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1790 transitions. [2023-01-27 17:59:40,979 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1790 transitions. [2023-01-27 17:59:40,980 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 17:59:40,980 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1790 transitions. [2023-01-27 17:59:40,982 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 119.33333333333333) internal successors, (1790), 15 states have internal predecessors, (1790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:59:40,986 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 248.0) internal successors, (3968), 16 states have internal predecessors, (3968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:59:40,986 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 248.0) internal successors, (3968), 16 states have internal predecessors, (3968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:59:40,986 INFO L175 Difference]: Start difference. First operand has 96 places, 159 transitions, 1279 flow. Second operand 15 states and 1790 transitions. [2023-01-27 17:59:40,986 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 746 transitions, 6728 flow [2023-01-27 18:00:20,136 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 746 transitions, 5862 flow, removed 364 selfloop flow, removed 3 redundant places. [2023-01-27 18:00:20,142 INFO L231 Difference]: Finished difference. Result has 116 places, 325 transitions, 3715 flow [2023-01-27 18:00:20,142 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=1119, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=3715, PETRI_PLACES=116, PETRI_TRANSITIONS=325} [2023-01-27 18:00:20,142 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, 54 predicate places. [2023-01-27 18:00:20,142 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 325 transitions, 3715 flow [2023-01-27 18:00:20,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 89.0) internal successors, (712), 8 states have internal predecessors, (712), 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 18:00:20,143 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 18:00:20,143 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 18:00:20,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-01-27 18:00:20,143 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2023-01-27 18:00:20,143 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 18:00:20,143 INFO L85 PathProgramCache]: Analyzing trace with hash 456391473, now seen corresponding path program 1 times [2023-01-27 18:00:20,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 18:00:20,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869646831] [2023-01-27 18:00:20,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 18:00:20,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 18:00:20,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 18:00:20,157 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-27 18:00:20,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 18:00:20,172 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-27 18:00:20,172 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-27 18:00:20,172 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2023-01-27 18:00:20,172 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2023-01-27 18:00:20,172 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 6 remaining) [2023-01-27 18:00:20,172 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2023-01-27 18:00:20,173 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2023-01-27 18:00:20,173 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2023-01-27 18:00:20,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-01-27 18:00:20,173 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2023-01-27 18:00:20,173 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-27 18:00:20,173 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-01-27 18:00:20,211 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-01-27 18:00:20,213 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 203 places, 202 transitions, 468 flow [2023-01-27 18:00:20,226 INFO L130 PetriNetUnfolder]: 12/205 cut-off events. [2023-01-27 18:00:20,226 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-01-27 18:00:20,227 INFO L83 FinitePrefix]: Finished finitePrefix Result has 234 conditions, 205 events. 12/205 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 571 event pairs, 0 based on Foata normal form. 0/187 useless extension candidates. Maximal degree in co-relation 225. Up to 10 conditions per place. [2023-01-27 18:00:20,227 INFO L82 GeneralOperation]: Start removeDead. Operand has 203 places, 202 transitions, 468 flow [2023-01-27 18:00:20,228 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 163 places, 159 transitions, 353 flow [2023-01-27 18:00:20,228 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-27 18:00:20,228 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 163 places, 159 transitions, 353 flow [2023-01-27 18:00:20,228 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 163 places, 159 transitions, 353 flow [2023-01-27 18:00:20,228 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 163 places, 159 transitions, 353 flow [2023-01-27 18:00:20,241 INFO L130 PetriNetUnfolder]: 12/205 cut-off events. [2023-01-27 18:00:20,242 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-01-27 18:00:20,243 INFO L83 FinitePrefix]: Finished finitePrefix Result has 231 conditions, 205 events. 12/205 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 569 event pairs, 0 based on Foata normal form. 0/187 useless extension candidates. Maximal degree in co-relation 204. Up to 10 conditions per place. [2023-01-27 18:00:20,248 INFO L119 LiptonReduction]: Number of co-enabled transitions 15182 [2023-01-27 18:00:23,055 INFO L134 LiptonReduction]: Checked pairs total: 52357 [2023-01-27 18:00:23,055 INFO L136 LiptonReduction]: Total number of compositions: 106 [2023-01-27 18:00:23,056 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-27 18:00:23,056 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;@53359a23, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-27 18:00:23,056 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-01-27 18:00:23,058 INFO L130 PetriNetUnfolder]: 2/12 cut-off events. [2023-01-27 18:00:23,058 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-27 18:00:23,058 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 18:00:23,058 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-01-27 18:00:23,058 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-01-27 18:00:23,058 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 18:00:23,058 INFO L85 PathProgramCache]: Analyzing trace with hash 1290665048, now seen corresponding path program 1 times [2023-01-27 18:00:23,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 18:00:23,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699432414] [2023-01-27 18:00:23,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 18:00:23,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 18:00:23,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 18:00:23,109 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 18:00:23,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 18:00:23,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699432414] [2023-01-27 18:00:23,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699432414] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 18:00:23,110 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 18:00:23,110 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-01-27 18:00:23,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008076782] [2023-01-27 18:00:23,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 18:00:23,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 18:00:23,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 18:00:23,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 18:00:23,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 18:00:23,111 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 308 [2023-01-27 18:00:23,111 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 71 transitions, 177 flow. Second operand has 3 states, 3 states have (on average 112.33333333333333) internal successors, (337), 3 states have internal predecessors, (337), 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 18:00:23,111 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 18:00:23,111 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 308 [2023-01-27 18:00:23,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand