/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/weaver/popl20-figure1-alt.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-b8dbc81 [2023-01-27 21:37:13,374 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-01-27 21:37:13,375 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-01-27 21:37:13,400 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-01-27 21:37:13,400 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-01-27 21:37:13,402 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-01-27 21:37:13,404 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-01-27 21:37:13,406 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-01-27 21:37:13,407 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-01-27 21:37:13,410 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-01-27 21:37:13,412 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-01-27 21:37:13,413 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-01-27 21:37:13,413 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-01-27 21:37:13,415 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-01-27 21:37:13,415 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-01-27 21:37:13,416 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-01-27 21:37:13,417 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-01-27 21:37:13,417 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-01-27 21:37:13,419 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-01-27 21:37:13,422 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-01-27 21:37:13,423 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-01-27 21:37:13,424 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-01-27 21:37:13,424 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-01-27 21:37:13,425 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-01-27 21:37:13,431 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-01-27 21:37:13,437 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-01-27 21:37:13,437 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-01-27 21:37:13,438 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-01-27 21:37:13,439 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 21:37:13,464 INFO L113 SettingsManager]: Loading preferences was successful [2023-01-27 21:37:13,465 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-01-27 21:37:13,466 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-01-27 21:37:13,466 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-01-27 21:37:13,466 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-01-27 21:37:13,466 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-01-27 21:37:13,467 INFO L138 SettingsManager]: * Use SBE=true [2023-01-27 21:37:13,467 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-01-27 21:37:13,467 INFO L138 SettingsManager]: * sizeof long=4 [2023-01-27 21:37:13,467 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-01-27 21:37:13,467 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-01-27 21:37:13,468 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-01-27 21:37:13,468 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-01-27 21:37:13,468 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-01-27 21:37:13,468 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-01-27 21:37:13,468 INFO L138 SettingsManager]: * sizeof long double=12 [2023-01-27 21:37:13,468 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-01-27 21:37:13,468 INFO L138 SettingsManager]: * Use constant arrays=true [2023-01-27 21:37:13,468 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-01-27 21:37:13,468 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-01-27 21:37:13,469 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-01-27 21:37:13,469 INFO L138 SettingsManager]: * To the following directory=./dump/ [2023-01-27 21:37:13,469 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-01-27 21:37:13,469 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-27 21:37:13,469 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-01-27 21:37:13,469 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-01-27 21:37:13,469 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-01-27 21:37:13,469 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-01-27 21:37:13,470 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-01-27 21:37:13,470 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-01-27 21:37:13,470 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-01-27 21:37:13,470 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-01-27 21:37:13,663 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-01-27 21:37:13,681 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-01-27 21:37:13,684 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-01-27 21:37:13,684 INFO L271 PluginConnector]: Initializing CDTParser... [2023-01-27 21:37:13,686 INFO L275 PluginConnector]: CDTParser initialized [2023-01-27 21:37:13,687 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-figure1-alt.wvr.c [2023-01-27 21:37:14,638 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-01-27 21:37:14,797 INFO L351 CDTParser]: Found 1 translation units. [2023-01-27 21:37:14,798 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-figure1-alt.wvr.c [2023-01-27 21:37:14,802 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3cd005ec9/9bed6e89149f4a99845378a9ca83f2d9/FLAG15ecb14d8 [2023-01-27 21:37:14,815 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3cd005ec9/9bed6e89149f4a99845378a9ca83f2d9 [2023-01-27 21:37:14,817 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-01-27 21:37:14,818 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2023-01-27 21:37:14,819 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-01-27 21:37:14,820 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-01-27 21:37:14,821 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-01-27 21:37:14,822 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 09:37:14" (1/1) ... [2023-01-27 21:37:14,822 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5fb52e99 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 09:37:14, skipping insertion in model container [2023-01-27 21:37:14,823 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 09:37:14" (1/1) ... [2023-01-27 21:37:14,827 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-01-27 21:37:14,838 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-01-27 21:37:14,943 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-figure1-alt.wvr.c[2087,2100] [2023-01-27 21:37:14,945 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-27 21:37:14,951 INFO L203 MainTranslator]: Completed pre-run [2023-01-27 21:37:14,962 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-figure1-alt.wvr.c[2087,2100] [2023-01-27 21:37:14,962 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-27 21:37:14,966 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-01-27 21:37:14,967 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-01-27 21:37:14,971 INFO L208 MainTranslator]: Completed translation [2023-01-27 21:37:14,971 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 09:37:14 WrapperNode [2023-01-27 21:37:14,971 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-01-27 21:37:14,972 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-01-27 21:37:14,972 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-01-27 21:37:14,972 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-01-27 21:37:14,976 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 09:37:14" (1/1) ... [2023-01-27 21:37:14,980 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 09:37:14" (1/1) ... [2023-01-27 21:37:14,991 INFO L138 Inliner]: procedures = 21, calls = 25, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 78 [2023-01-27 21:37:14,991 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-01-27 21:37:14,991 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-01-27 21:37:14,992 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-01-27 21:37:14,992 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-01-27 21:37:14,996 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 09:37:14" (1/1) ... [2023-01-27 21:37:14,996 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 09:37:14" (1/1) ... [2023-01-27 21:37:14,998 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 09:37:14" (1/1) ... [2023-01-27 21:37:14,998 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 09:37:14" (1/1) ... [2023-01-27 21:37:15,000 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 09:37:14" (1/1) ... [2023-01-27 21:37:15,002 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 09:37:14" (1/1) ... [2023-01-27 21:37:15,003 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 09:37:14" (1/1) ... [2023-01-27 21:37:15,004 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 09:37:14" (1/1) ... [2023-01-27 21:37:15,005 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-01-27 21:37:15,006 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-01-27 21:37:15,006 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-01-27 21:37:15,006 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-01-27 21:37:15,007 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 09:37:14" (1/1) ... [2023-01-27 21:37:15,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-27 21:37:15,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:37:15,029 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 21:37:15,049 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 21:37:15,068 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-01-27 21:37:15,069 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-01-27 21:37:15,069 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-01-27 21:37:15,069 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-01-27 21:37:15,069 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-01-27 21:37:15,069 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-01-27 21:37:15,069 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-01-27 21:37:15,069 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-01-27 21:37:15,069 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-01-27 21:37:15,069 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-01-27 21:37:15,069 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-01-27 21:37:15,069 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-01-27 21:37:15,069 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-01-27 21:37:15,070 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-01-27 21:37:15,070 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 21:37:15,170 INFO L236 CfgBuilder]: Building ICFG [2023-01-27 21:37:15,171 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-01-27 21:37:15,356 INFO L277 CfgBuilder]: Performing block encoding [2023-01-27 21:37:15,383 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-01-27 21:37:15,383 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-01-27 21:37:15,385 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 09:37:15 BoogieIcfgContainer [2023-01-27 21:37:15,385 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-01-27 21:37:15,387 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-01-27 21:37:15,387 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-01-27 21:37:15,389 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-01-27 21:37:15,389 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.01 09:37:14" (1/3) ... [2023-01-27 21:37:15,389 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7fe909e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 09:37:15, skipping insertion in model container [2023-01-27 21:37:15,389 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 09:37:14" (2/3) ... [2023-01-27 21:37:15,389 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7fe909e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 09:37:15, skipping insertion in model container [2023-01-27 21:37:15,389 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 09:37:15" (3/3) ... [2023-01-27 21:37:15,390 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-figure1-alt.wvr.c [2023-01-27 21:37:15,404 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-01-27 21:37:15,404 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-01-27 21:37:15,404 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-01-27 21:37:15,460 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-01-27 21:37:15,505 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 85 places, 84 transitions, 184 flow [2023-01-27 21:37:15,547 INFO L130 PetriNetUnfolder]: 6/82 cut-off events. [2023-01-27 21:37:15,547 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-27 21:37:15,550 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91 conditions, 82 events. 6/82 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 49 event pairs, 0 based on Foata normal form. 0/75 useless extension candidates. Maximal degree in co-relation 49. Up to 2 conditions per place. [2023-01-27 21:37:15,551 INFO L82 GeneralOperation]: Start removeDead. Operand has 85 places, 84 transitions, 184 flow [2023-01-27 21:37:15,553 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 75 places, 74 transitions, 160 flow [2023-01-27 21:37:15,556 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-27 21:37:15,562 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 75 places, 74 transitions, 160 flow [2023-01-27 21:37:15,564 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 75 places, 74 transitions, 160 flow [2023-01-27 21:37:15,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 75 places, 74 transitions, 160 flow [2023-01-27 21:37:15,593 INFO L130 PetriNetUnfolder]: 6/74 cut-off events. [2023-01-27 21:37:15,596 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-27 21:37:15,597 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83 conditions, 74 events. 6/74 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 50 event pairs, 0 based on Foata normal form. 0/68 useless extension candidates. Maximal degree in co-relation 49. Up to 2 conditions per place. [2023-01-27 21:37:15,597 INFO L119 LiptonReduction]: Number of co-enabled transitions 500 [2023-01-27 21:37:17,260 INFO L134 LiptonReduction]: Checked pairs total: 559 [2023-01-27 21:37:17,260 INFO L136 LiptonReduction]: Total number of compositions: 68 [2023-01-27 21:37:17,270 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-27 21:37:17,274 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;@347e4be, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-27 21:37:17,274 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-01-27 21:37:17,277 INFO L130 PetriNetUnfolder]: 2/14 cut-off events. [2023-01-27 21:37:17,278 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-27 21:37:17,278 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:37:17,278 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:37:17,278 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 21:37:17,281 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:37:17,282 INFO L85 PathProgramCache]: Analyzing trace with hash -463799749, now seen corresponding path program 1 times [2023-01-27 21:37:17,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:37:17,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845628151] [2023-01-27 21:37:17,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:37:17,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:37:17,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:37:17,843 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 21:37:17,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:37:17,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845628151] [2023-01-27 21:37:17,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845628151] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 21:37:17,844 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 21:37:17,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-01-27 21:37:17,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694038491] [2023-01-27 21:37:17,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 21:37:17,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-01-27 21:37:17,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:37:17,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-01-27 21:37:17,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-01-27 21:37:17,875 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 152 [2023-01-27 21:37:17,880 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 15 transitions, 42 flow. Second operand has 7 states, 7 states have (on average 57.857142857142854) internal successors, (405), 7 states have internal predecessors, (405), 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 21:37:17,880 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:37:17,880 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 152 [2023-01-27 21:37:17,881 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:37:18,055 INFO L130 PetriNetUnfolder]: 62/126 cut-off events. [2023-01-27 21:37:18,056 INFO L131 PetriNetUnfolder]: For 21/21 co-relation queries the response was YES. [2023-01-27 21:37:18,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 278 conditions, 126 events. 62/126 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 353 event pairs, 14 based on Foata normal form. 1/103 useless extension candidates. Maximal degree in co-relation 200. Up to 63 conditions per place. [2023-01-27 21:37:18,059 INFO L137 encePairwiseOnDemand]: 144/152 looper letters, 32 selfloop transitions, 8 changer transitions 5/45 dead transitions. [2023-01-27 21:37:18,059 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 45 transitions, 213 flow [2023-01-27 21:37:18,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-01-27 21:37:18,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-01-27 21:37:18,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 439 transitions. [2023-01-27 21:37:18,075 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.412593984962406 [2023-01-27 21:37:18,076 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 439 transitions. [2023-01-27 21:37:18,076 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 439 transitions. [2023-01-27 21:37:18,079 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:37:18,081 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 439 transitions. [2023-01-27 21:37:18,084 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 62.714285714285715) internal successors, (439), 7 states have internal predecessors, (439), 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 21:37:18,088 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 152.0) internal successors, (1216), 8 states have internal predecessors, (1216), 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 21:37:18,089 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 152.0) internal successors, (1216), 8 states have internal predecessors, (1216), 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 21:37:18,091 INFO L175 Difference]: Start difference. First operand has 20 places, 15 transitions, 42 flow. Second operand 7 states and 439 transitions. [2023-01-27 21:37:18,091 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 45 transitions, 213 flow [2023-01-27 21:37:18,097 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 45 transitions, 191 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-01-27 21:37:18,098 INFO L231 Difference]: Finished difference. Result has 27 places, 22 transitions, 89 flow [2023-01-27 21:37:18,099 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=34, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=89, PETRI_PLACES=27, PETRI_TRANSITIONS=22} [2023-01-27 21:37:18,101 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 7 predicate places. [2023-01-27 21:37:18,102 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 22 transitions, 89 flow [2023-01-27 21:37:18,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 57.857142857142854) internal successors, (405), 7 states have internal predecessors, (405), 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 21:37:18,102 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:37:18,102 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:37:18,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-01-27 21:37:18,103 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 21:37:18,103 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:37:18,103 INFO L85 PathProgramCache]: Analyzing trace with hash -1560515861, now seen corresponding path program 2 times [2023-01-27 21:37:18,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:37:18,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183180502] [2023-01-27 21:37:18,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:37:18,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:37:18,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:37:18,327 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 21:37:18,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:37:18,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183180502] [2023-01-27 21:37:18,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183180502] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 21:37:18,328 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 21:37:18,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-01-27 21:37:18,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943426179] [2023-01-27 21:37:18,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 21:37:18,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-01-27 21:37:18,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:37:18,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-01-27 21:37:18,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-01-27 21:37:18,330 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 152 [2023-01-27 21:37:18,331 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 22 transitions, 89 flow. Second operand has 7 states, 7 states have (on average 57.857142857142854) internal successors, (405), 7 states have internal predecessors, (405), 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 21:37:18,331 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:37:18,331 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 152 [2023-01-27 21:37:18,331 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:37:18,465 INFO L130 PetriNetUnfolder]: 63/131 cut-off events. [2023-01-27 21:37:18,465 INFO L131 PetriNetUnfolder]: For 63/63 co-relation queries the response was YES. [2023-01-27 21:37:18,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 391 conditions, 131 events. 63/131 cut-off events. For 63/63 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 408 event pairs, 10 based on Foata normal form. 1/126 useless extension candidates. Maximal degree in co-relation 377. Up to 63 conditions per place. [2023-01-27 21:37:18,467 INFO L137 encePairwiseOnDemand]: 145/152 looper letters, 29 selfloop transitions, 8 changer transitions 11/48 dead transitions. [2023-01-27 21:37:18,467 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 48 transitions, 269 flow [2023-01-27 21:37:18,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-01-27 21:37:18,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-01-27 21:37:18,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 437 transitions. [2023-01-27 21:37:18,468 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4107142857142857 [2023-01-27 21:37:18,468 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 437 transitions. [2023-01-27 21:37:18,468 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 437 transitions. [2023-01-27 21:37:18,469 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:37:18,469 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 437 transitions. [2023-01-27 21:37:18,470 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 62.42857142857143) internal successors, (437), 7 states have internal predecessors, (437), 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 21:37:18,471 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 152.0) internal successors, (1216), 8 states have internal predecessors, (1216), 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 21:37:18,472 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 152.0) internal successors, (1216), 8 states have internal predecessors, (1216), 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 21:37:18,472 INFO L175 Difference]: Start difference. First operand has 27 places, 22 transitions, 89 flow. Second operand 7 states and 437 transitions. [2023-01-27 21:37:18,472 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 48 transitions, 269 flow [2023-01-27 21:37:18,474 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 48 transitions, 263 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-01-27 21:37:18,475 INFO L231 Difference]: Finished difference. Result has 35 places, 23 transitions, 121 flow [2023-01-27 21:37:18,476 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=85, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=121, PETRI_PLACES=35, PETRI_TRANSITIONS=23} [2023-01-27 21:37:18,477 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 15 predicate places. [2023-01-27 21:37:18,477 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 23 transitions, 121 flow [2023-01-27 21:37:18,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 57.857142857142854) internal successors, (405), 7 states have internal predecessors, (405), 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 21:37:18,477 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:37:18,477 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:37:18,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-01-27 21:37:18,478 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 21:37:18,479 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:37:18,479 INFO L85 PathProgramCache]: Analyzing trace with hash -2054408487, now seen corresponding path program 3 times [2023-01-27 21:37:18,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:37:18,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547020700] [2023-01-27 21:37:18,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:37:18,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:37:18,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:37:18,694 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 21:37:18,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:37:18,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547020700] [2023-01-27 21:37:18,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547020700] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 21:37:18,695 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 21:37:18,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-01-27 21:37:18,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650182271] [2023-01-27 21:37:18,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 21:37:18,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-01-27 21:37:18,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:37:18,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-01-27 21:37:18,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-01-27 21:37:18,697 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 152 [2023-01-27 21:37:18,698 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 23 transitions, 121 flow. Second operand has 7 states, 7 states have (on average 57.857142857142854) internal successors, (405), 7 states have internal predecessors, (405), 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 21:37:18,698 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:37:18,698 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 152 [2023-01-27 21:37:18,698 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:37:18,813 INFO L130 PetriNetUnfolder]: 66/144 cut-off events. [2023-01-27 21:37:18,813 INFO L131 PetriNetUnfolder]: For 204/204 co-relation queries the response was YES. [2023-01-27 21:37:18,815 INFO L83 FinitePrefix]: Finished finitePrefix Result has 515 conditions, 144 events. 66/144 cut-off events. For 204/204 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 462 event pairs, 18 based on Foata normal form. 1/139 useless extension candidates. Maximal degree in co-relation 494. Up to 67 conditions per place. [2023-01-27 21:37:18,817 INFO L137 encePairwiseOnDemand]: 145/152 looper letters, 33 selfloop transitions, 11 changer transitions 8/52 dead transitions. [2023-01-27 21:37:18,818 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 52 transitions, 337 flow [2023-01-27 21:37:18,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-01-27 21:37:18,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-01-27 21:37:18,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 442 transitions. [2023-01-27 21:37:18,819 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41541353383458646 [2023-01-27 21:37:18,819 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 442 transitions. [2023-01-27 21:37:18,819 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 442 transitions. [2023-01-27 21:37:18,819 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:37:18,819 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 442 transitions. [2023-01-27 21:37:18,820 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 63.142857142857146) internal successors, (442), 7 states have internal predecessors, (442), 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 21:37:18,821 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 152.0) internal successors, (1216), 8 states have internal predecessors, (1216), 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 21:37:18,822 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 152.0) internal successors, (1216), 8 states have internal predecessors, (1216), 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 21:37:18,822 INFO L175 Difference]: Start difference. First operand has 35 places, 23 transitions, 121 flow. Second operand 7 states and 442 transitions. [2023-01-27 21:37:18,823 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 52 transitions, 337 flow [2023-01-27 21:37:18,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 52 transitions, 304 flow, removed 11 selfloop flow, removed 4 redundant places. [2023-01-27 21:37:18,826 INFO L231 Difference]: Finished difference. Result has 39 places, 27 transitions, 165 flow [2023-01-27 21:37:18,826 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=101, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=165, PETRI_PLACES=39, PETRI_TRANSITIONS=27} [2023-01-27 21:37:18,827 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 19 predicate places. [2023-01-27 21:37:18,829 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 27 transitions, 165 flow [2023-01-27 21:37:18,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 57.857142857142854) internal successors, (405), 7 states have internal predecessors, (405), 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 21:37:18,830 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:37:18,830 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:37:18,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-01-27 21:37:18,830 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 21:37:18,830 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:37:18,830 INFO L85 PathProgramCache]: Analyzing trace with hash 485360883, now seen corresponding path program 4 times [2023-01-27 21:37:18,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:37:18,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321598648] [2023-01-27 21:37:18,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:37:18,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:37:18,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:37:19,032 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 21:37:19,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:37:19,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321598648] [2023-01-27 21:37:19,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321598648] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 21:37:19,033 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 21:37:19,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-01-27 21:37:19,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822519429] [2023-01-27 21:37:19,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 21:37:19,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-01-27 21:37:19,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:37:19,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-01-27 21:37:19,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2023-01-27 21:37:19,034 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 152 [2023-01-27 21:37:19,035 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 27 transitions, 165 flow. Second operand has 7 states, 7 states have (on average 57.857142857142854) internal successors, (405), 7 states have internal predecessors, (405), 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 21:37:19,035 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:37:19,035 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 152 [2023-01-27 21:37:19,035 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:37:19,133 INFO L130 PetriNetUnfolder]: 64/142 cut-off events. [2023-01-27 21:37:19,133 INFO L131 PetriNetUnfolder]: For 239/239 co-relation queries the response was YES. [2023-01-27 21:37:19,134 INFO L83 FinitePrefix]: Finished finitePrefix Result has 529 conditions, 142 events. 64/142 cut-off events. For 239/239 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 464 event pairs, 12 based on Foata normal form. 1/137 useless extension candidates. Maximal degree in co-relation 506. Up to 67 conditions per place. [2023-01-27 21:37:19,134 INFO L137 encePairwiseOnDemand]: 145/152 looper letters, 36 selfloop transitions, 12 changer transitions 5/53 dead transitions. [2023-01-27 21:37:19,135 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 53 transitions, 367 flow [2023-01-27 21:37:19,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-01-27 21:37:19,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-01-27 21:37:19,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 441 transitions. [2023-01-27 21:37:19,136 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4144736842105263 [2023-01-27 21:37:19,136 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 441 transitions. [2023-01-27 21:37:19,136 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 441 transitions. [2023-01-27 21:37:19,136 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:37:19,136 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 441 transitions. [2023-01-27 21:37:19,137 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 63.0) internal successors, (441), 7 states have internal predecessors, (441), 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 21:37:19,138 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 152.0) internal successors, (1216), 8 states have internal predecessors, (1216), 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 21:37:19,138 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 152.0) internal successors, (1216), 8 states have internal predecessors, (1216), 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 21:37:19,138 INFO L175 Difference]: Start difference. First operand has 39 places, 27 transitions, 165 flow. Second operand 7 states and 441 transitions. [2023-01-27 21:37:19,139 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 53 transitions, 367 flow [2023-01-27 21:37:19,140 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 53 transitions, 350 flow, removed 3 selfloop flow, removed 3 redundant places. [2023-01-27 21:37:19,141 INFO L231 Difference]: Finished difference. Result has 45 places, 29 transitions, 216 flow [2023-01-27 21:37:19,141 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=153, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=216, PETRI_PLACES=45, PETRI_TRANSITIONS=29} [2023-01-27 21:37:19,141 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 25 predicate places. [2023-01-27 21:37:19,141 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 29 transitions, 216 flow [2023-01-27 21:37:19,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 57.857142857142854) internal successors, (405), 7 states have internal predecessors, (405), 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 21:37:19,142 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:37:19,142 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:37:19,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-01-27 21:37:19,142 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 21:37:19,142 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:37:19,142 INFO L85 PathProgramCache]: Analyzing trace with hash -2091229915, now seen corresponding path program 5 times [2023-01-27 21:37:19,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:37:19,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705477116] [2023-01-27 21:37:19,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:37:19,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:37:19,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:37:19,297 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 21:37:19,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:37:19,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705477116] [2023-01-27 21:37:19,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705477116] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 21:37:19,297 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 21:37:19,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-01-27 21:37:19,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571183745] [2023-01-27 21:37:19,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 21:37:19,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-01-27 21:37:19,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:37:19,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-01-27 21:37:19,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2023-01-27 21:37:19,299 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 152 [2023-01-27 21:37:19,300 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 29 transitions, 216 flow. Second operand has 7 states, 7 states have (on average 57.857142857142854) internal successors, (405), 7 states have internal predecessors, (405), 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 21:37:19,300 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:37:19,300 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 152 [2023-01-27 21:37:19,300 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:37:19,399 INFO L130 PetriNetUnfolder]: 63/135 cut-off events. [2023-01-27 21:37:19,399 INFO L131 PetriNetUnfolder]: For 328/328 co-relation queries the response was YES. [2023-01-27 21:37:19,400 INFO L83 FinitePrefix]: Finished finitePrefix Result has 559 conditions, 135 events. 63/135 cut-off events. For 328/328 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 421 event pairs, 12 based on Foata normal form. 1/130 useless extension candidates. Maximal degree in co-relation 536. Up to 67 conditions per place. [2023-01-27 21:37:19,400 INFO L137 encePairwiseOnDemand]: 145/152 looper letters, 29 selfloop transitions, 11 changer transitions 9/49 dead transitions. [2023-01-27 21:37:19,400 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 49 transitions, 383 flow [2023-01-27 21:37:19,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-01-27 21:37:19,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-01-27 21:37:19,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 436 transitions. [2023-01-27 21:37:19,402 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40977443609022557 [2023-01-27 21:37:19,402 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 436 transitions. [2023-01-27 21:37:19,402 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 436 transitions. [2023-01-27 21:37:19,402 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:37:19,402 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 436 transitions. [2023-01-27 21:37:19,403 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 62.285714285714285) internal successors, (436), 7 states have internal predecessors, (436), 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 21:37:19,404 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 152.0) internal successors, (1216), 8 states have internal predecessors, (1216), 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 21:37:19,404 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 152.0) internal successors, (1216), 8 states have internal predecessors, (1216), 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 21:37:19,404 INFO L175 Difference]: Start difference. First operand has 45 places, 29 transitions, 216 flow. Second operand 7 states and 436 transitions. [2023-01-27 21:37:19,404 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 49 transitions, 383 flow [2023-01-27 21:37:19,406 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 49 transitions, 364 flow, removed 4 selfloop flow, removed 3 redundant places. [2023-01-27 21:37:19,407 INFO L231 Difference]: Finished difference. Result has 50 places, 29 transitions, 232 flow [2023-01-27 21:37:19,407 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=201, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=232, PETRI_PLACES=50, PETRI_TRANSITIONS=29} [2023-01-27 21:37:19,407 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 30 predicate places. [2023-01-27 21:37:19,407 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 29 transitions, 232 flow [2023-01-27 21:37:19,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 57.857142857142854) internal successors, (405), 7 states have internal predecessors, (405), 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 21:37:19,408 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:37:19,408 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:37:19,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-01-27 21:37:19,408 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 21:37:19,408 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:37:19,408 INFO L85 PathProgramCache]: Analyzing trace with hash -2082114117, now seen corresponding path program 6 times [2023-01-27 21:37:19,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:37:19,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253222061] [2023-01-27 21:37:19,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:37:19,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:37:19,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:37:19,568 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 21:37:19,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:37:19,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253222061] [2023-01-27 21:37:19,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253222061] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 21:37:19,568 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 21:37:19,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-01-27 21:37:19,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543229413] [2023-01-27 21:37:19,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 21:37:19,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-01-27 21:37:19,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:37:19,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-01-27 21:37:19,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-01-27 21:37:19,570 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 152 [2023-01-27 21:37:19,570 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 29 transitions, 232 flow. Second operand has 7 states, 7 states have (on average 57.857142857142854) internal successors, (405), 7 states have internal predecessors, (405), 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 21:37:19,570 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:37:19,570 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 152 [2023-01-27 21:37:19,571 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:37:19,621 INFO L130 PetriNetUnfolder]: 59/121 cut-off events. [2023-01-27 21:37:19,621 INFO L131 PetriNetUnfolder]: For 367/367 co-relation queries the response was YES. [2023-01-27 21:37:19,622 INFO L83 FinitePrefix]: Finished finitePrefix Result has 522 conditions, 121 events. 59/121 cut-off events. For 367/367 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 338 event pairs, 14 based on Foata normal form. 1/116 useless extension candidates. Maximal degree in co-relation 500. Up to 67 conditions per place. [2023-01-27 21:37:19,622 INFO L137 encePairwiseOnDemand]: 145/152 looper letters, 22 selfloop transitions, 11 changer transitions 12/45 dead transitions. [2023-01-27 21:37:19,622 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 45 transitions, 379 flow [2023-01-27 21:37:19,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-01-27 21:37:19,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-01-27 21:37:19,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 432 transitions. [2023-01-27 21:37:19,624 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40601503759398494 [2023-01-27 21:37:19,624 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 432 transitions. [2023-01-27 21:37:19,624 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 432 transitions. [2023-01-27 21:37:19,624 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:37:19,624 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 432 transitions. [2023-01-27 21:37:19,625 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 61.714285714285715) internal successors, (432), 7 states have internal predecessors, (432), 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 21:37:19,626 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 152.0) internal successors, (1216), 8 states have internal predecessors, (1216), 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 21:37:19,626 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 152.0) internal successors, (1216), 8 states have internal predecessors, (1216), 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 21:37:19,626 INFO L175 Difference]: Start difference. First operand has 50 places, 29 transitions, 232 flow. Second operand 7 states and 432 transitions. [2023-01-27 21:37:19,627 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 45 transitions, 379 flow [2023-01-27 21:37:19,628 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 45 transitions, 345 flow, removed 5 selfloop flow, removed 7 redundant places. [2023-01-27 21:37:19,629 INFO L231 Difference]: Finished difference. Result has 49 places, 28 transitions, 214 flow [2023-01-27 21:37:19,629 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=200, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=214, PETRI_PLACES=49, PETRI_TRANSITIONS=28} [2023-01-27 21:37:19,629 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 29 predicate places. [2023-01-27 21:37:19,629 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 28 transitions, 214 flow [2023-01-27 21:37:19,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 57.857142857142854) internal successors, (405), 7 states have internal predecessors, (405), 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 21:37:19,630 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:37:19,630 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:37:19,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-01-27 21:37:19,630 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 21:37:19,630 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:37:19,630 INFO L85 PathProgramCache]: Analyzing trace with hash -2107689934, now seen corresponding path program 1 times [2023-01-27 21:37:19,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:37:19,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504360622] [2023-01-27 21:37:19,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:37:19,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:37:19,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:37:19,765 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:37:19,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:37:19,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504360622] [2023-01-27 21:37:19,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504360622] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:37:19,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951719797] [2023-01-27 21:37:19,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:37:19,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:37:19,766 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:37:19,774 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 21:37:19,780 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-01-27 21:37:19,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:37:19,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2023-01-27 21:37:19,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:37:20,059 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:37:20,059 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:37:20,240 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:37:20,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1951719797] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:37:20,241 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:37:20,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 17 [2023-01-27 21:37:20,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616750316] [2023-01-27 21:37:20,241 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:37:20,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-01-27 21:37:20,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:37:20,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-01-27 21:37:20,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2023-01-27 21:37:20,243 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 152 [2023-01-27 21:37:20,244 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 28 transitions, 214 flow. Second operand has 19 states, 19 states have (on average 58.0) internal successors, (1102), 19 states have internal predecessors, (1102), 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 21:37:20,244 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:37:20,244 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 152 [2023-01-27 21:37:20,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:37:20,804 INFO L130 PetriNetUnfolder]: 144/300 cut-off events. [2023-01-27 21:37:20,804 INFO L131 PetriNetUnfolder]: For 262/262 co-relation queries the response was YES. [2023-01-27 21:37:20,805 INFO L83 FinitePrefix]: Finished finitePrefix Result has 947 conditions, 300 events. 144/300 cut-off events. For 262/262 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1256 event pairs, 4 based on Foata normal form. 3/269 useless extension candidates. Maximal degree in co-relation 911. Up to 89 conditions per place. [2023-01-27 21:37:20,806 INFO L137 encePairwiseOnDemand]: 144/152 looper letters, 70 selfloop transitions, 27 changer transitions 25/122 dead transitions. [2023-01-27 21:37:20,806 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 122 transitions, 742 flow [2023-01-27 21:37:20,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-01-27 21:37:20,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-01-27 21:37:20,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1183 transitions. [2023-01-27 21:37:20,809 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40962603878116344 [2023-01-27 21:37:20,809 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1183 transitions. [2023-01-27 21:37:20,809 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1183 transitions. [2023-01-27 21:37:20,809 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:37:20,809 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1183 transitions. [2023-01-27 21:37:20,811 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 62.26315789473684) internal successors, (1183), 19 states have internal predecessors, (1183), 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 21:37:20,814 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 152.0) internal successors, (3040), 20 states have internal predecessors, (3040), 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 21:37:20,814 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 152.0) internal successors, (3040), 20 states have internal predecessors, (3040), 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 21:37:20,814 INFO L175 Difference]: Start difference. First operand has 49 places, 28 transitions, 214 flow. Second operand 19 states and 1183 transitions. [2023-01-27 21:37:20,814 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 122 transitions, 742 flow [2023-01-27 21:37:20,816 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 122 transitions, 688 flow, removed 8 selfloop flow, removed 11 redundant places. [2023-01-27 21:37:20,817 INFO L231 Difference]: Finished difference. Result has 61 places, 44 transitions, 317 flow [2023-01-27 21:37:20,817 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=317, PETRI_PLACES=61, PETRI_TRANSITIONS=44} [2023-01-27 21:37:20,818 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 41 predicate places. [2023-01-27 21:37:20,818 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 44 transitions, 317 flow [2023-01-27 21:37:20,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 58.0) internal successors, (1102), 19 states have internal predecessors, (1102), 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 21:37:20,818 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:37:20,818 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:37:20,823 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-01-27 21:37:21,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:37:21,024 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 21:37:21,024 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:37:21,024 INFO L85 PathProgramCache]: Analyzing trace with hash -635034376, now seen corresponding path program 2 times [2023-01-27 21:37:21,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:37:21,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132861550] [2023-01-27 21:37:21,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:37:21,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:37:21,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:37:21,161 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:37:21,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:37:21,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132861550] [2023-01-27 21:37:21,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132861550] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:37:21,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840088949] [2023-01-27 21:37:21,162 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 21:37:21,162 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:37:21,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:37:21,163 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 21:37:21,165 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-01-27 21:37:21,208 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 21:37:21,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:37:21,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2023-01-27 21:37:21,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:37:21,344 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:37:21,344 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:37:21,497 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:37:21,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [840088949] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:37:21,498 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:37:21,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 17 [2023-01-27 21:37:21,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976947390] [2023-01-27 21:37:21,498 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:37:21,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-01-27 21:37:21,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:37:21,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-01-27 21:37:21,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2023-01-27 21:37:21,501 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 152 [2023-01-27 21:37:21,502 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 44 transitions, 317 flow. Second operand has 19 states, 19 states have (on average 58.0) internal successors, (1102), 19 states have internal predecessors, (1102), 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 21:37:21,502 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:37:21,502 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 152 [2023-01-27 21:37:21,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:37:22,478 INFO L130 PetriNetUnfolder]: 189/426 cut-off events. [2023-01-27 21:37:22,478 INFO L131 PetriNetUnfolder]: For 1014/1014 co-relation queries the response was YES. [2023-01-27 21:37:22,480 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1672 conditions, 426 events. 189/426 cut-off events. For 1014/1014 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2146 event pairs, 10 based on Foata normal form. 4/430 useless extension candidates. Maximal degree in co-relation 1603. Up to 123 conditions per place. [2023-01-27 21:37:22,482 INFO L137 encePairwiseOnDemand]: 144/152 looper letters, 107 selfloop transitions, 53 changer transitions 20/180 dead transitions. [2023-01-27 21:37:22,482 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 180 transitions, 1262 flow [2023-01-27 21:37:22,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-01-27 21:37:22,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-01-27 21:37:22,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 1909 transitions. [2023-01-27 21:37:22,486 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4051358234295416 [2023-01-27 21:37:22,487 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 1909 transitions. [2023-01-27 21:37:22,487 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 1909 transitions. [2023-01-27 21:37:22,487 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:37:22,488 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 1909 transitions. [2023-01-27 21:37:22,492 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 61.58064516129032) internal successors, (1909), 31 states have internal predecessors, (1909), 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 21:37:22,498 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 152.0) internal successors, (4864), 32 states have internal predecessors, (4864), 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 21:37:22,499 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 152.0) internal successors, (4864), 32 states have internal predecessors, (4864), 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 21:37:22,499 INFO L175 Difference]: Start difference. First operand has 61 places, 44 transitions, 317 flow. Second operand 31 states and 1909 transitions. [2023-01-27 21:37:22,499 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 180 transitions, 1262 flow [2023-01-27 21:37:22,502 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 180 transitions, 1092 flow, removed 76 selfloop flow, removed 7 redundant places. [2023-01-27 21:37:22,505 INFO L231 Difference]: Finished difference. Result has 91 places, 71 transitions, 586 flow [2023-01-27 21:37:22,505 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=265, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=586, PETRI_PLACES=91, PETRI_TRANSITIONS=71} [2023-01-27 21:37:22,507 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 71 predicate places. [2023-01-27 21:37:22,507 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 71 transitions, 586 flow [2023-01-27 21:37:22,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 58.0) internal successors, (1102), 19 states have internal predecessors, (1102), 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 21:37:22,508 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:37:22,508 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:37:22,532 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-01-27 21:37:22,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-01-27 21:37:22,714 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 21:37:22,714 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:37:22,714 INFO L85 PathProgramCache]: Analyzing trace with hash -708723856, now seen corresponding path program 3 times [2023-01-27 21:37:22,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:37:22,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546691382] [2023-01-27 21:37:22,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:37:22,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:37:22,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:37:22,887 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:37:22,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:37:22,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546691382] [2023-01-27 21:37:22,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546691382] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:37:22,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116458396] [2023-01-27 21:37:22,889 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-27 21:37:22,889 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:37:22,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:37:22,890 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 21:37:22,892 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-01-27 21:37:22,939 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-27 21:37:22,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:37:22,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2023-01-27 21:37:22,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:37:23,058 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:37:23,058 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:37:23,208 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:37:23,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1116458396] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:37:23,208 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:37:23,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 17 [2023-01-27 21:37:23,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172764936] [2023-01-27 21:37:23,209 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:37:23,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-01-27 21:37:23,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:37:23,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-01-27 21:37:23,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2023-01-27 21:37:23,211 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 152 [2023-01-27 21:37:23,212 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 71 transitions, 586 flow. Second operand has 19 states, 19 states have (on average 58.10526315789474) internal successors, (1104), 19 states have internal predecessors, (1104), 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 21:37:23,212 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:37:23,212 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 152 [2023-01-27 21:37:23,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:37:24,054 INFO L130 PetriNetUnfolder]: 185/397 cut-off events. [2023-01-27 21:37:24,054 INFO L131 PetriNetUnfolder]: For 1780/1780 co-relation queries the response was YES. [2023-01-27 21:37:24,055 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1839 conditions, 397 events. 185/397 cut-off events. For 1780/1780 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 1877 event pairs, 6 based on Foata normal form. 5/402 useless extension candidates. Maximal degree in co-relation 1807. Up to 119 conditions per place. [2023-01-27 21:37:24,056 INFO L137 encePairwiseOnDemand]: 144/152 looper letters, 82 selfloop transitions, 43 changer transitions 33/158 dead transitions. [2023-01-27 21:37:24,056 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 158 transitions, 1256 flow [2023-01-27 21:37:24,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-01-27 21:37:24,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-01-27 21:37:24,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1605 transitions. [2023-01-27 21:37:24,062 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4061234817813765 [2023-01-27 21:37:24,062 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 1605 transitions. [2023-01-27 21:37:24,063 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 1605 transitions. [2023-01-27 21:37:24,063 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:37:24,063 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 1605 transitions. [2023-01-27 21:37:24,066 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 61.73076923076923) internal successors, (1605), 26 states have internal predecessors, (1605), 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 21:37:24,070 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 152.0) internal successors, (4104), 27 states have internal predecessors, (4104), 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 21:37:24,070 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 152.0) internal successors, (4104), 27 states have internal predecessors, (4104), 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 21:37:24,071 INFO L175 Difference]: Start difference. First operand has 91 places, 71 transitions, 586 flow. Second operand 26 states and 1605 transitions. [2023-01-27 21:37:24,071 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 158 transitions, 1256 flow [2023-01-27 21:37:24,077 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 158 transitions, 1137 flow, removed 39 selfloop flow, removed 8 redundant places. [2023-01-27 21:37:24,079 INFO L231 Difference]: Finished difference. Result has 109 places, 66 transitions, 564 flow [2023-01-27 21:37:24,079 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=469, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=564, PETRI_PLACES=109, PETRI_TRANSITIONS=66} [2023-01-27 21:37:24,080 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 89 predicate places. [2023-01-27 21:37:24,080 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 66 transitions, 564 flow [2023-01-27 21:37:24,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 58.10526315789474) internal successors, (1104), 19 states have internal predecessors, (1104), 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 21:37:24,080 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:37:24,080 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:37:24,087 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-01-27 21:37:24,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:37:24,285 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 21:37:24,286 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:37:24,286 INFO L85 PathProgramCache]: Analyzing trace with hash -2082814152, now seen corresponding path program 4 times [2023-01-27 21:37:24,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:37:24,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777059893] [2023-01-27 21:37:24,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:37:24,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:37:24,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:37:24,416 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:37:24,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:37:24,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777059893] [2023-01-27 21:37:24,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777059893] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:37:24,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729796993] [2023-01-27 21:37:24,416 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-27 21:37:24,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:37:24,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:37:24,418 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 21:37:24,420 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-01-27 21:37:24,466 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-27 21:37:24,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:37:24,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2023-01-27 21:37:24,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:37:24,617 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:37:24,618 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:37:24,768 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:37:24,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1729796993] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:37:24,768 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:37:24,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 17 [2023-01-27 21:37:24,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968126520] [2023-01-27 21:37:24,769 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:37:24,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-01-27 21:37:24,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:37:24,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-01-27 21:37:24,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2023-01-27 21:37:24,770 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 152 [2023-01-27 21:37:24,771 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 66 transitions, 564 flow. Second operand has 19 states, 19 states have (on average 58.0) internal successors, (1102), 19 states have internal predecessors, (1102), 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 21:37:24,771 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:37:24,771 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 152 [2023-01-27 21:37:24,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:37:25,026 INFO L130 PetriNetUnfolder]: 168/351 cut-off events. [2023-01-27 21:37:25,026 INFO L131 PetriNetUnfolder]: For 1783/1783 co-relation queries the response was YES. [2023-01-27 21:37:25,027 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1696 conditions, 351 events. 168/351 cut-off events. For 1783/1783 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1516 event pairs, 4 based on Foata normal form. 2/351 useless extension candidates. Maximal degree in co-relation 1659. Up to 155 conditions per place. [2023-01-27 21:37:25,029 INFO L137 encePairwiseOnDemand]: 144/152 looper letters, 54 selfloop transitions, 38 changer transitions 10/102 dead transitions. [2023-01-27 21:37:25,029 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 102 transitions, 918 flow [2023-01-27 21:37:25,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-01-27 21:37:25,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-01-27 21:37:25,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 799 transitions. [2023-01-27 21:37:25,030 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4043522267206478 [2023-01-27 21:37:25,030 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 799 transitions. [2023-01-27 21:37:25,030 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 799 transitions. [2023-01-27 21:37:25,030 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:37:25,031 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 799 transitions. [2023-01-27 21:37:25,031 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 61.46153846153846) internal successors, (799), 13 states have internal predecessors, (799), 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 21:37:25,033 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 152.0) internal successors, (2128), 14 states have internal predecessors, (2128), 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 21:37:25,033 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 152.0) internal successors, (2128), 14 states have internal predecessors, (2128), 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 21:37:25,033 INFO L175 Difference]: Start difference. First operand has 109 places, 66 transitions, 564 flow. Second operand 13 states and 799 transitions. [2023-01-27 21:37:25,033 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 102 transitions, 918 flow [2023-01-27 21:37:25,038 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 102 transitions, 801 flow, removed 16 selfloop flow, removed 19 redundant places. [2023-01-27 21:37:25,039 INFO L231 Difference]: Finished difference. Result has 92 places, 68 transitions, 554 flow [2023-01-27 21:37:25,039 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=455, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=554, PETRI_PLACES=92, PETRI_TRANSITIONS=68} [2023-01-27 21:37:25,039 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 72 predicate places. [2023-01-27 21:37:25,039 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 68 transitions, 554 flow [2023-01-27 21:37:25,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 58.0) internal successors, (1102), 19 states have internal predecessors, (1102), 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 21:37:25,040 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:37:25,040 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:37:25,047 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-01-27 21:37:25,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:37:25,245 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 21:37:25,245 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:37:25,245 INFO L85 PathProgramCache]: Analyzing trace with hash 992131436, now seen corresponding path program 5 times [2023-01-27 21:37:25,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:37:25,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979862577] [2023-01-27 21:37:25,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:37:25,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:37:25,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:37:25,365 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:37:25,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:37:25,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979862577] [2023-01-27 21:37:25,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979862577] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:37:25,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748740071] [2023-01-27 21:37:25,365 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-27 21:37:25,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:37:25,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:37:25,369 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 21:37:25,371 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-01-27 21:37:25,412 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 21:37:25,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:37:25,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2023-01-27 21:37:25,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:37:25,552 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:37:25,553 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:37:25,669 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:37:25,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1748740071] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:37:25,669 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:37:25,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 17 [2023-01-27 21:37:25,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530337456] [2023-01-27 21:37:25,671 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:37:25,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-01-27 21:37:25,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:37:25,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-01-27 21:37:25,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2023-01-27 21:37:25,675 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 152 [2023-01-27 21:37:25,676 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 68 transitions, 554 flow. Second operand has 19 states, 19 states have (on average 58.0) internal successors, (1102), 19 states have internal predecessors, (1102), 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 21:37:25,676 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:37:25,676 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 152 [2023-01-27 21:37:25,676 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:37:25,916 INFO L130 PetriNetUnfolder]: 170/357 cut-off events. [2023-01-27 21:37:25,917 INFO L131 PetriNetUnfolder]: For 1289/1289 co-relation queries the response was YES. [2023-01-27 21:37:25,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1617 conditions, 357 events. 170/357 cut-off events. For 1289/1289 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1548 event pairs, 5 based on Foata normal form. 2/357 useless extension candidates. Maximal degree in co-relation 1584. Up to 195 conditions per place. [2023-01-27 21:37:25,919 INFO L137 encePairwiseOnDemand]: 144/152 looper letters, 60 selfloop transitions, 27 changer transitions 10/97 dead transitions. [2023-01-27 21:37:25,919 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 97 transitions, 866 flow [2023-01-27 21:37:25,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-01-27 21:37:25,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-01-27 21:37:25,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 671 transitions. [2023-01-27 21:37:25,920 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40131578947368424 [2023-01-27 21:37:25,920 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 671 transitions. [2023-01-27 21:37:25,920 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 671 transitions. [2023-01-27 21:37:25,920 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:37:25,920 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 671 transitions. [2023-01-27 21:37:25,921 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 61.0) internal successors, (671), 11 states have internal predecessors, (671), 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 21:37:25,922 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 152.0) internal successors, (1824), 12 states have internal predecessors, (1824), 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 21:37:25,923 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 152.0) internal successors, (1824), 12 states have internal predecessors, (1824), 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 21:37:25,923 INFO L175 Difference]: Start difference. First operand has 92 places, 68 transitions, 554 flow. Second operand 11 states and 671 transitions. [2023-01-27 21:37:25,923 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 97 transitions, 866 flow [2023-01-27 21:37:25,927 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 97 transitions, 771 flow, removed 12 selfloop flow, removed 12 redundant places. [2023-01-27 21:37:25,928 INFO L231 Difference]: Finished difference. Result has 92 places, 70 transitions, 546 flow [2023-01-27 21:37:25,928 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=469, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=546, PETRI_PLACES=92, PETRI_TRANSITIONS=70} [2023-01-27 21:37:25,928 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 72 predicate places. [2023-01-27 21:37:25,928 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 70 transitions, 546 flow [2023-01-27 21:37:25,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 58.0) internal successors, (1102), 19 states have internal predecessors, (1102), 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 21:37:25,929 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:37:25,929 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:37:25,936 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-01-27 21:37:26,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-01-27 21:37:26,137 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 21:37:26,137 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:37:26,137 INFO L85 PathProgramCache]: Analyzing trace with hash 209179710, now seen corresponding path program 6 times [2023-01-27 21:37:26,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:37:26,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810289475] [2023-01-27 21:37:26,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:37:26,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:37:26,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:37:26,272 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:37:26,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:37:26,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810289475] [2023-01-27 21:37:26,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810289475] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:37:26,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455183921] [2023-01-27 21:37:26,272 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-27 21:37:26,272 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:37:26,272 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:37:26,273 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 21:37:26,275 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-01-27 21:37:26,321 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-01-27 21:37:26,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:37:26,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2023-01-27 21:37:26,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:37:26,470 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:37:26,470 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:37:26,652 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:37:26,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1455183921] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:37:26,652 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:37:26,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 17 [2023-01-27 21:37:26,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333071888] [2023-01-27 21:37:26,652 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:37:26,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-01-27 21:37:26,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:37:26,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-01-27 21:37:26,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2023-01-27 21:37:26,654 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 152 [2023-01-27 21:37:26,654 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 70 transitions, 546 flow. Second operand has 19 states, 19 states have (on average 58.0) internal successors, (1102), 19 states have internal predecessors, (1102), 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 21:37:26,655 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:37:26,655 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 152 [2023-01-27 21:37:26,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:37:27,295 INFO L130 PetriNetUnfolder]: 208/476 cut-off events. [2023-01-27 21:37:27,295 INFO L131 PetriNetUnfolder]: For 1757/1757 co-relation queries the response was YES. [2023-01-27 21:37:27,296 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2105 conditions, 476 events. 208/476 cut-off events. For 1757/1757 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 2487 event pairs, 3 based on Foata normal form. 3/477 useless extension candidates. Maximal degree in co-relation 2063. Up to 240 conditions per place. [2023-01-27 21:37:27,298 INFO L137 encePairwiseOnDemand]: 143/152 looper letters, 94 selfloop transitions, 45 changer transitions 16/155 dead transitions. [2023-01-27 21:37:27,298 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 155 transitions, 1263 flow [2023-01-27 21:37:27,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-01-27 21:37:27,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-01-27 21:37:27,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1344 transitions. [2023-01-27 21:37:27,300 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4019138755980861 [2023-01-27 21:37:27,300 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1344 transitions. [2023-01-27 21:37:27,300 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1344 transitions. [2023-01-27 21:37:27,300 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:37:27,300 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1344 transitions. [2023-01-27 21:37:27,301 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 61.09090909090909) internal successors, (1344), 22 states have internal predecessors, (1344), 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 21:37:27,304 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 152.0) internal successors, (3496), 23 states have internal predecessors, (3496), 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 21:37:27,304 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 152.0) internal successors, (3496), 23 states have internal predecessors, (3496), 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 21:37:27,304 INFO L175 Difference]: Start difference. First operand has 92 places, 70 transitions, 546 flow. Second operand 22 states and 1344 transitions. [2023-01-27 21:37:27,304 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 155 transitions, 1263 flow [2023-01-27 21:37:27,312 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 155 transitions, 1212 flow, removed 6 selfloop flow, removed 7 redundant places. [2023-01-27 21:37:27,313 INFO L231 Difference]: Finished difference. Result has 110 places, 91 transitions, 874 flow [2023-01-27 21:37:27,313 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=509, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=874, PETRI_PLACES=110, PETRI_TRANSITIONS=91} [2023-01-27 21:37:27,314 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 90 predicate places. [2023-01-27 21:37:27,314 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 91 transitions, 874 flow [2023-01-27 21:37:27,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 58.0) internal successors, (1102), 19 states have internal predecessors, (1102), 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 21:37:27,314 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:37:27,314 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:37:27,329 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-01-27 21:37:27,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:37:27,519 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 21:37:27,520 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:37:27,520 INFO L85 PathProgramCache]: Analyzing trace with hash 135490230, now seen corresponding path program 7 times [2023-01-27 21:37:27,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:37:27,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023200380] [2023-01-27 21:37:27,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:37:27,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:37:27,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:37:27,630 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:37:27,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:37:27,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023200380] [2023-01-27 21:37:27,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023200380] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:37:27,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459956467] [2023-01-27 21:37:27,630 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-27 21:37:27,630 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:37:27,630 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:37:27,646 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 21:37:27,647 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-01-27 21:37:27,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:37:27,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2023-01-27 21:37:27,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:37:27,832 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:37:27,832 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:37:27,989 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:37:27,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [459956467] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:37:27,989 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:37:27,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 17 [2023-01-27 21:37:27,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843388207] [2023-01-27 21:37:27,990 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:37:27,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-01-27 21:37:27,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:37:27,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-01-27 21:37:27,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2023-01-27 21:37:27,991 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 152 [2023-01-27 21:37:27,992 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 91 transitions, 874 flow. Second operand has 19 states, 19 states have (on average 58.10526315789474) internal successors, (1104), 19 states have internal predecessors, (1104), 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 21:37:27,992 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:37:27,992 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 152 [2023-01-27 21:37:27,992 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:37:28,561 INFO L130 PetriNetUnfolder]: 203/442 cut-off events. [2023-01-27 21:37:28,561 INFO L131 PetriNetUnfolder]: For 2236/2236 co-relation queries the response was YES. [2023-01-27 21:37:28,562 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2237 conditions, 442 events. 203/442 cut-off events. For 2236/2236 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 2193 event pairs, 3 based on Foata normal form. 4/444 useless extension candidates. Maximal degree in co-relation 2196. Up to 236 conditions per place. [2023-01-27 21:37:28,564 INFO L137 encePairwiseOnDemand]: 143/152 looper letters, 71 selfloop transitions, 38 changer transitions 28/137 dead transitions. [2023-01-27 21:37:28,564 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 137 transitions, 1289 flow [2023-01-27 21:37:28,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-01-27 21:37:28,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-01-27 21:37:28,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1157 transitions. [2023-01-27 21:37:28,565 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4006232686980609 [2023-01-27 21:37:28,565 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1157 transitions. [2023-01-27 21:37:28,565 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1157 transitions. [2023-01-27 21:37:28,565 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:37:28,566 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1157 transitions. [2023-01-27 21:37:28,567 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 60.89473684210526) internal successors, (1157), 19 states have internal predecessors, (1157), 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 21:37:28,569 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 152.0) internal successors, (3040), 20 states have internal predecessors, (3040), 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 21:37:28,569 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 152.0) internal successors, (3040), 20 states have internal predecessors, (3040), 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 21:37:28,569 INFO L175 Difference]: Start difference. First operand has 110 places, 91 transitions, 874 flow. Second operand 19 states and 1157 transitions. [2023-01-27 21:37:28,569 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 137 transitions, 1289 flow [2023-01-27 21:37:28,577 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 137 transitions, 1113 flow, removed 70 selfloop flow, removed 8 redundant places. [2023-01-27 21:37:28,581 INFO L231 Difference]: Finished difference. Result has 122 places, 87 transitions, 782 flow [2023-01-27 21:37:28,582 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=714, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=782, PETRI_PLACES=122, PETRI_TRANSITIONS=87} [2023-01-27 21:37:28,582 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 102 predicate places. [2023-01-27 21:37:28,582 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 87 transitions, 782 flow [2023-01-27 21:37:28,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 58.10526315789474) internal successors, (1104), 19 states have internal predecessors, (1104), 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 21:37:28,583 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:37:28,583 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:37:28,591 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-01-27 21:37:28,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:37:28,790 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 21:37:28,790 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:37:28,790 INFO L85 PathProgramCache]: Analyzing trace with hash 1069243532, now seen corresponding path program 8 times [2023-01-27 21:37:28,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:37:28,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341448677] [2023-01-27 21:37:28,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:37:28,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:37:28,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:37:28,906 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:37:28,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:37:28,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341448677] [2023-01-27 21:37:28,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341448677] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:37:28,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770741442] [2023-01-27 21:37:28,906 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 21:37:28,907 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:37:28,907 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:37:28,907 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 21:37:28,935 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-01-27 21:37:28,957 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 21:37:28,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:37:28,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2023-01-27 21:37:28,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:37:29,077 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:37:29,077 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:37:29,176 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:37:29,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [770741442] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:37:29,176 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:37:29,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 17 [2023-01-27 21:37:29,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19033124] [2023-01-27 21:37:29,177 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:37:29,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-01-27 21:37:29,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:37:29,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-01-27 21:37:29,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2023-01-27 21:37:29,178 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 152 [2023-01-27 21:37:29,179 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 87 transitions, 782 flow. Second operand has 19 states, 19 states have (on average 58.0) internal successors, (1102), 19 states have internal predecessors, (1102), 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 21:37:29,179 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:37:29,179 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 152 [2023-01-27 21:37:29,179 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:37:29,450 INFO L130 PetriNetUnfolder]: 188/399 cut-off events. [2023-01-27 21:37:29,450 INFO L131 PetriNetUnfolder]: For 1561/1561 co-relation queries the response was YES. [2023-01-27 21:37:29,451 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1937 conditions, 399 events. 188/399 cut-off events. For 1561/1561 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 1837 event pairs, 9 based on Foata normal form. 2/399 useless extension candidates. Maximal degree in co-relation 1896. Up to 214 conditions per place. [2023-01-27 21:37:29,453 INFO L137 encePairwiseOnDemand]: 144/152 looper letters, 71 selfloop transitions, 33 changer transitions 11/115 dead transitions. [2023-01-27 21:37:29,453 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 115 transitions, 1141 flow [2023-01-27 21:37:29,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-01-27 21:37:29,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-01-27 21:37:29,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 733 transitions. [2023-01-27 21:37:29,454 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4018640350877193 [2023-01-27 21:37:29,454 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 733 transitions. [2023-01-27 21:37:29,454 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 733 transitions. [2023-01-27 21:37:29,454 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:37:29,454 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 733 transitions. [2023-01-27 21:37:29,464 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 61.083333333333336) internal successors, (733), 12 states have internal predecessors, (733), 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 21:37:29,466 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 152.0) internal successors, (1976), 13 states have internal predecessors, (1976), 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 21:37:29,466 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 152.0) internal successors, (1976), 13 states have internal predecessors, (1976), 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 21:37:29,467 INFO L175 Difference]: Start difference. First operand has 122 places, 87 transitions, 782 flow. Second operand 12 states and 733 transitions. [2023-01-27 21:37:29,467 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 115 transitions, 1141 flow [2023-01-27 21:37:29,473 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 115 transitions, 1022 flow, removed 10 selfloop flow, removed 14 redundant places. [2023-01-27 21:37:29,474 INFO L231 Difference]: Finished difference. Result has 105 places, 87 transitions, 746 flow [2023-01-27 21:37:29,474 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=658, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=746, PETRI_PLACES=105, PETRI_TRANSITIONS=87} [2023-01-27 21:37:29,475 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 85 predicate places. [2023-01-27 21:37:29,475 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 87 transitions, 746 flow [2023-01-27 21:37:29,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 58.0) internal successors, (1102), 19 states have internal predecessors, (1102), 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 21:37:29,475 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:37:29,475 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:37:29,480 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-01-27 21:37:29,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-01-27 21:37:29,678 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 21:37:29,678 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:37:29,678 INFO L85 PathProgramCache]: Analyzing trace with hash -1595484335, now seen corresponding path program 9 times [2023-01-27 21:37:29,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:37:29,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850676438] [2023-01-27 21:37:29,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:37:29,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:37:29,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:37:29,807 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:37:29,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:37:29,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850676438] [2023-01-27 21:37:29,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850676438] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:37:29,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338132831] [2023-01-27 21:37:29,808 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-27 21:37:29,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:37:29,809 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:37:29,809 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 21:37:29,811 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-01-27 21:37:29,856 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-27 21:37:29,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:37:29,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 25 conjunts are in the unsatisfiable core [2023-01-27 21:37:29,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:37:30,012 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:37:30,013 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:37:30,205 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:37:30,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [338132831] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:37:30,206 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:37:30,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 20 [2023-01-27 21:37:30,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390257670] [2023-01-27 21:37:30,207 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:37:30,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-01-27 21:37:30,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:37:30,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-01-27 21:37:30,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2023-01-27 21:37:30,208 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 152 [2023-01-27 21:37:30,209 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 87 transitions, 746 flow. Second operand has 22 states, 22 states have (on average 57.86363636363637) internal successors, (1273), 22 states have internal predecessors, (1273), 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 21:37:30,209 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:37:30,209 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 152 [2023-01-27 21:37:30,209 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:37:31,440 INFO L130 PetriNetUnfolder]: 298/649 cut-off events. [2023-01-27 21:37:31,440 INFO L131 PetriNetUnfolder]: For 2333/2333 co-relation queries the response was YES. [2023-01-27 21:37:31,442 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2892 conditions, 649 events. 298/649 cut-off events. For 2333/2333 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 3532 event pairs, 2 based on Foata normal form. 6/651 useless extension candidates. Maximal degree in co-relation 2820. Up to 182 conditions per place. [2023-01-27 21:37:31,444 INFO L137 encePairwiseOnDemand]: 143/152 looper letters, 145 selfloop transitions, 94 changer transitions 31/270 dead transitions. [2023-01-27 21:37:31,444 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 270 transitions, 2195 flow [2023-01-27 21:37:31,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-01-27 21:37:31,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2023-01-27 21:37:31,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 2349 transitions. [2023-01-27 21:37:31,463 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40668282548476453 [2023-01-27 21:37:31,463 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 2349 transitions. [2023-01-27 21:37:31,463 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 2349 transitions. [2023-01-27 21:37:31,465 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:37:31,465 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 2349 transitions. [2023-01-27 21:37:31,469 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 61.81578947368421) internal successors, (2349), 38 states have internal predecessors, (2349), 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 21:37:31,475 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 152.0) internal successors, (5928), 39 states have internal predecessors, (5928), 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 21:37:31,476 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 152.0) internal successors, (5928), 39 states have internal predecessors, (5928), 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 21:37:31,476 INFO L175 Difference]: Start difference. First operand has 105 places, 87 transitions, 746 flow. Second operand 38 states and 2349 transitions. [2023-01-27 21:37:31,476 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 270 transitions, 2195 flow [2023-01-27 21:37:31,485 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 270 transitions, 2085 flow, removed 18 selfloop flow, removed 11 redundant places. [2023-01-27 21:37:31,487 INFO L231 Difference]: Finished difference. Result has 139 places, 141 transitions, 1449 flow [2023-01-27 21:37:31,488 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=680, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=1449, PETRI_PLACES=139, PETRI_TRANSITIONS=141} [2023-01-27 21:37:31,488 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 119 predicate places. [2023-01-27 21:37:31,488 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 141 transitions, 1449 flow [2023-01-27 21:37:31,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 57.86363636363637) internal successors, (1273), 22 states have internal predecessors, (1273), 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 21:37:31,489 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:37:31,489 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:37:31,494 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-01-27 21:37:31,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-01-27 21:37:31,693 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 21:37:31,694 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:37:31,694 INFO L85 PathProgramCache]: Analyzing trace with hash -749756410, now seen corresponding path program 1 times [2023-01-27 21:37:31,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:37:31,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283954123] [2023-01-27 21:37:31,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:37:31,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:37:31,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:37:31,794 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:37:31,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:37:31,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283954123] [2023-01-27 21:37:31,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283954123] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:37:31,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455394838] [2023-01-27 21:37:31,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:37:31,794 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:37:31,795 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:37:31,795 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 21:37:31,818 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-01-27 21:37:31,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:37:31,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 21 conjunts are in the unsatisfiable core [2023-01-27 21:37:31,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:37:31,928 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:37:31,928 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:37:32,068 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:37:32,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [455394838] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:37:32,068 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:37:32,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2023-01-27 21:37:32,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524332993] [2023-01-27 21:37:32,068 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:37:32,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-01-27 21:37:32,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:37:32,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-01-27 21:37:32,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2023-01-27 21:37:32,070 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 152 [2023-01-27 21:37:32,071 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 141 transitions, 1449 flow. Second operand has 18 states, 18 states have (on average 57.72222222222222) internal successors, (1039), 18 states have internal predecessors, (1039), 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 21:37:32,071 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:37:32,071 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 152 [2023-01-27 21:37:32,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:37:32,532 INFO L130 PetriNetUnfolder]: 427/905 cut-off events. [2023-01-27 21:37:32,532 INFO L131 PetriNetUnfolder]: For 4514/4514 co-relation queries the response was YES. [2023-01-27 21:37:32,534 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4653 conditions, 905 events. 427/905 cut-off events. For 4514/4514 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 5277 event pairs, 10 based on Foata normal form. 5/908 useless extension candidates. Maximal degree in co-relation 4436. Up to 237 conditions per place. [2023-01-27 21:37:32,537 INFO L137 encePairwiseOnDemand]: 144/152 looper letters, 164 selfloop transitions, 68 changer transitions 17/249 dead transitions. [2023-01-27 21:37:32,538 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 249 transitions, 2712 flow [2023-01-27 21:37:32,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-01-27 21:37:32,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-01-27 21:37:32,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1071 transitions. [2023-01-27 21:37:32,539 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4144736842105263 [2023-01-27 21:37:32,539 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1071 transitions. [2023-01-27 21:37:32,539 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1071 transitions. [2023-01-27 21:37:32,539 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:37:32,539 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1071 transitions. [2023-01-27 21:37:32,541 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 63.0) internal successors, (1071), 17 states have internal predecessors, (1071), 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 21:37:32,542 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 152.0) internal successors, (2736), 18 states have internal predecessors, (2736), 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 21:37:32,543 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 152.0) internal successors, (2736), 18 states have internal predecessors, (2736), 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 21:37:32,543 INFO L175 Difference]: Start difference. First operand has 139 places, 141 transitions, 1449 flow. Second operand 17 states and 1071 transitions. [2023-01-27 21:37:32,543 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 249 transitions, 2712 flow [2023-01-27 21:37:32,562 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 249 transitions, 2279 flow, removed 191 selfloop flow, removed 15 redundant places. [2023-01-27 21:37:32,564 INFO L231 Difference]: Finished difference. Result has 141 places, 156 transitions, 1585 flow [2023-01-27 21:37:32,564 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=1176, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1585, PETRI_PLACES=141, PETRI_TRANSITIONS=156} [2023-01-27 21:37:32,565 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 121 predicate places. [2023-01-27 21:37:32,565 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 156 transitions, 1585 flow [2023-01-27 21:37:32,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 57.72222222222222) internal successors, (1039), 18 states have internal predecessors, (1039), 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 21:37:32,565 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:37:32,565 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:37:32,570 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-01-27 21:37:32,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-01-27 21:37:32,770 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 21:37:32,770 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:37:32,770 INFO L85 PathProgramCache]: Analyzing trace with hash 976032698, now seen corresponding path program 2 times [2023-01-27 21:37:32,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:37:32,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599780154] [2023-01-27 21:37:32,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:37:32,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:37:32,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:37:32,866 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:37:32,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:37:32,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599780154] [2023-01-27 21:37:32,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599780154] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:37:32,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391291667] [2023-01-27 21:37:32,867 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 21:37:32,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:37:32,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:37:32,868 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 21:37:32,870 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-01-27 21:37:32,922 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 21:37:32,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:37:32,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 21 conjunts are in the unsatisfiable core [2023-01-27 21:37:32,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:37:33,066 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:37:33,066 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:37:33,167 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:37:33,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391291667] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:37:33,167 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:37:33,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2023-01-27 21:37:33,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224257168] [2023-01-27 21:37:33,167 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:37:33,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-01-27 21:37:33,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:37:33,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-01-27 21:37:33,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2023-01-27 21:37:33,169 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 152 [2023-01-27 21:37:33,169 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 156 transitions, 1585 flow. Second operand has 18 states, 18 states have (on average 57.72222222222222) internal successors, (1039), 18 states have internal predecessors, (1039), 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 21:37:33,169 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:37:33,169 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 152 [2023-01-27 21:37:33,169 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:37:33,626 INFO L130 PetriNetUnfolder]: 411/855 cut-off events. [2023-01-27 21:37:33,626 INFO L131 PetriNetUnfolder]: For 3772/3772 co-relation queries the response was YES. [2023-01-27 21:37:33,628 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4270 conditions, 855 events. 411/855 cut-off events. For 3772/3772 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 4799 event pairs, 10 based on Foata normal form. 5/860 useless extension candidates. Maximal degree in co-relation 4149. Up to 217 conditions per place. [2023-01-27 21:37:33,631 INFO L137 encePairwiseOnDemand]: 144/152 looper letters, 139 selfloop transitions, 60 changer transitions 40/239 dead transitions. [2023-01-27 21:37:33,631 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 239 transitions, 2513 flow [2023-01-27 21:37:33,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-01-27 21:37:33,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-01-27 21:37:33,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1175 transitions. [2023-01-27 21:37:33,633 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40685595567867033 [2023-01-27 21:37:33,633 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1175 transitions. [2023-01-27 21:37:33,633 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1175 transitions. [2023-01-27 21:37:33,634 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:37:33,634 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1175 transitions. [2023-01-27 21:37:33,635 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 61.8421052631579) internal successors, (1175), 19 states have internal predecessors, (1175), 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 21:37:33,637 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 152.0) internal successors, (3040), 20 states have internal predecessors, (3040), 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 21:37:33,637 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 152.0) internal successors, (3040), 20 states have internal predecessors, (3040), 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 21:37:33,637 INFO L175 Difference]: Start difference. First operand has 141 places, 156 transitions, 1585 flow. Second operand 19 states and 1175 transitions. [2023-01-27 21:37:33,637 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 239 transitions, 2513 flow [2023-01-27 21:37:33,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 239 transitions, 2420 flow, removed 21 selfloop flow, removed 11 redundant places. [2023-01-27 21:37:33,654 INFO L231 Difference]: Finished difference. Result has 149 places, 142 transitions, 1473 flow [2023-01-27 21:37:33,655 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=1515, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=1473, PETRI_PLACES=149, PETRI_TRANSITIONS=142} [2023-01-27 21:37:33,655 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 129 predicate places. [2023-01-27 21:37:33,655 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 142 transitions, 1473 flow [2023-01-27 21:37:33,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 57.72222222222222) internal successors, (1039), 18 states have internal predecessors, (1039), 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 21:37:33,655 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:37:33,656 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:37:33,660 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-01-27 21:37:33,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-01-27 21:37:33,860 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 21:37:33,860 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:37:33,860 INFO L85 PathProgramCache]: Analyzing trace with hash -1591276241, now seen corresponding path program 10 times [2023-01-27 21:37:33,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:37:33,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885920235] [2023-01-27 21:37:33,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:37:33,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:37:33,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:37:33,990 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:37:33,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:37:33,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885920235] [2023-01-27 21:37:33,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885920235] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:37:33,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583170651] [2023-01-27 21:37:33,990 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-27 21:37:33,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:37:33,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:37:33,991 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 21:37:33,993 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-01-27 21:37:34,035 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-27 21:37:34,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:37:34,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 25 conjunts are in the unsatisfiable core [2023-01-27 21:37:34,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:37:34,191 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:37:34,191 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:37:34,394 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:37:34,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1583170651] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:37:34,394 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:37:34,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 20 [2023-01-27 21:37:34,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360470761] [2023-01-27 21:37:34,395 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:37:34,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-01-27 21:37:34,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:37:34,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-01-27 21:37:34,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2023-01-27 21:37:34,396 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 152 [2023-01-27 21:37:34,397 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 142 transitions, 1473 flow. Second operand has 22 states, 22 states have (on average 57.86363636363637) internal successors, (1273), 22 states have internal predecessors, (1273), 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 21:37:34,397 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:37:34,397 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 152 [2023-01-27 21:37:34,397 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:37:35,294 INFO L130 PetriNetUnfolder]: 334/717 cut-off events. [2023-01-27 21:37:35,294 INFO L131 PetriNetUnfolder]: For 3992/3992 co-relation queries the response was YES. [2023-01-27 21:37:35,296 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3656 conditions, 717 events. 334/717 cut-off events. For 3992/3992 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 3975 event pairs, 2 based on Foata normal form. 4/721 useless extension candidates. Maximal degree in co-relation 3542. Up to 274 conditions per place. [2023-01-27 21:37:35,298 INFO L137 encePairwiseOnDemand]: 143/152 looper letters, 112 selfloop transitions, 78 changer transitions 24/214 dead transitions. [2023-01-27 21:37:35,299 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 214 transitions, 2109 flow [2023-01-27 21:37:35,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-01-27 21:37:35,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-01-27 21:37:35,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 1660 transitions. [2023-01-27 21:37:35,300 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4044834307992203 [2023-01-27 21:37:35,300 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 1660 transitions. [2023-01-27 21:37:35,300 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 1660 transitions. [2023-01-27 21:37:35,301 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:37:35,301 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 1660 transitions. [2023-01-27 21:37:35,303 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 61.48148148148148) internal successors, (1660), 27 states have internal predecessors, (1660), 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 21:37:35,309 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 152.0) internal successors, (4256), 28 states have internal predecessors, (4256), 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 21:37:35,309 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 152.0) internal successors, (4256), 28 states have internal predecessors, (4256), 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 21:37:35,309 INFO L175 Difference]: Start difference. First operand has 149 places, 142 transitions, 1473 flow. Second operand 27 states and 1660 transitions. [2023-01-27 21:37:35,309 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 214 transitions, 2109 flow [2023-01-27 21:37:35,323 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 214 transitions, 1933 flow, removed 31 selfloop flow, removed 17 redundant places. [2023-01-27 21:37:35,325 INFO L231 Difference]: Finished difference. Result has 153 places, 137 transitions, 1439 flow [2023-01-27 21:37:35,325 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=1313, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=1439, PETRI_PLACES=153, PETRI_TRANSITIONS=137} [2023-01-27 21:37:35,325 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 133 predicate places. [2023-01-27 21:37:35,326 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 137 transitions, 1439 flow [2023-01-27 21:37:35,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 57.86363636363637) internal successors, (1273), 22 states have internal predecessors, (1273), 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 21:37:35,326 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:37:35,326 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:37:35,336 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-01-27 21:37:35,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-01-27 21:37:35,532 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 21:37:35,533 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:37:35,533 INFO L85 PathProgramCache]: Analyzing trace with hash 716408728, now seen corresponding path program 11 times [2023-01-27 21:37:35,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:37:35,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879807118] [2023-01-27 21:37:35,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:37:35,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:37:35,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:37:35,681 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 21:37:35,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:37:35,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879807118] [2023-01-27 21:37:35,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879807118] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:37:35,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004875954] [2023-01-27 21:37:35,681 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-27 21:37:35,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:37:35,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:37:35,682 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 21:37:35,684 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-01-27 21:37:35,734 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-01-27 21:37:35,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:37:35,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 29 conjunts are in the unsatisfiable core [2023-01-27 21:37:35,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:37:35,901 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:37:35,901 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:37:36,096 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:37:36,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2004875954] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:37:36,097 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:37:36,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 22 [2023-01-27 21:37:36,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292281171] [2023-01-27 21:37:36,097 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:37:36,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-01-27 21:37:36,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:37:36,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-01-27 21:37:36,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2023-01-27 21:37:36,099 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 152 [2023-01-27 21:37:36,100 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 137 transitions, 1439 flow. Second operand has 24 states, 24 states have (on average 57.833333333333336) internal successors, (1388), 24 states have internal predecessors, (1388), 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 21:37:36,100 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:37:36,100 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 152 [2023-01-27 21:37:36,100 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:37:38,358 INFO L130 PetriNetUnfolder]: 603/1334 cut-off events. [2023-01-27 21:37:38,359 INFO L131 PetriNetUnfolder]: For 8809/8809 co-relation queries the response was YES. [2023-01-27 21:37:38,362 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7150 conditions, 1334 events. 603/1334 cut-off events. For 8809/8809 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 8815 event pairs, 6 based on Foata normal form. 8/1342 useless extension candidates. Maximal degree in co-relation 7085. Up to 373 conditions per place. [2023-01-27 21:37:38,366 INFO L137 encePairwiseOnDemand]: 144/152 looper letters, 254 selfloop transitions, 179 changer transitions 41/474 dead transitions. [2023-01-27 21:37:38,366 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 474 transitions, 4798 flow [2023-01-27 21:37:38,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2023-01-27 21:37:38,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2023-01-27 21:37:38,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 4062 transitions. [2023-01-27 21:37:38,370 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4049043062200957 [2023-01-27 21:37:38,370 INFO L72 ComplementDD]: Start complementDD. Operand 66 states and 4062 transitions. [2023-01-27 21:37:38,370 INFO L73 IsDeterministic]: Start isDeterministic. Operand 66 states and 4062 transitions. [2023-01-27 21:37:38,371 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:37:38,371 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 66 states and 4062 transitions. [2023-01-27 21:37:38,374 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 67 states, 66 states have (on average 61.54545454545455) internal successors, (4062), 66 states have internal predecessors, (4062), 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 21:37:38,380 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 67 states, 67 states have (on average 152.0) internal successors, (10184), 67 states have internal predecessors, (10184), 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 21:37:38,380 INFO L81 ComplementDD]: Finished complementDD. Result has 67 states, 67 states have (on average 152.0) internal successors, (10184), 67 states have internal predecessors, (10184), 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 21:37:38,380 INFO L175 Difference]: Start difference. First operand has 153 places, 137 transitions, 1439 flow. Second operand 66 states and 4062 transitions. [2023-01-27 21:37:38,380 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 474 transitions, 4798 flow [2023-01-27 21:37:38,406 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 474 transitions, 4165 flow, removed 127 selfloop flow, removed 21 redundant places. [2023-01-27 21:37:38,410 INFO L231 Difference]: Finished difference. Result has 217 places, 243 transitions, 2985 flow [2023-01-27 21:37:38,410 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=1202, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=66, PETRI_FLOW=2985, PETRI_PLACES=217, PETRI_TRANSITIONS=243} [2023-01-27 21:37:38,410 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 197 predicate places. [2023-01-27 21:37:38,411 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 243 transitions, 2985 flow [2023-01-27 21:37:38,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 57.833333333333336) internal successors, (1388), 24 states have internal predecessors, (1388), 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 21:37:38,411 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:37:38,411 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:37:38,417 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-01-27 21:37:38,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:37:38,616 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 21:37:38,616 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:37:38,616 INFO L85 PathProgramCache]: Analyzing trace with hash -1336338705, now seen corresponding path program 3 times [2023-01-27 21:37:38,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:37:38,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66935881] [2023-01-27 21:37:38,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:37:38,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:37:38,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:37:38,714 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:37:38,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:37:38,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66935881] [2023-01-27 21:37:38,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66935881] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:37:38,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346326081] [2023-01-27 21:37:38,714 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-27 21:37:38,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:37:38,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:37:38,715 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 21:37:38,736 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-01-27 21:37:38,770 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-27 21:37:38,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:37:38,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 25 conjunts are in the unsatisfiable core [2023-01-27 21:37:38,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:37:38,869 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:37:38,870 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:37:38,958 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 21:37:38,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1346326081] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:37:38,959 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:37:38,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 17 [2023-01-27 21:37:38,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454371607] [2023-01-27 21:37:38,959 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:37:38,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-01-27 21:37:38,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:37:38,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-01-27 21:37:38,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2023-01-27 21:37:38,960 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 152 [2023-01-27 21:37:38,961 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 243 transitions, 2985 flow. Second operand has 19 states, 19 states have (on average 57.73684210526316) internal successors, (1097), 19 states have internal predecessors, (1097), 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 21:37:38,961 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:37:38,961 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 152 [2023-01-27 21:37:38,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:37:39,426 INFO L130 PetriNetUnfolder]: 625/1370 cut-off events. [2023-01-27 21:37:39,426 INFO L131 PetriNetUnfolder]: For 14056/14056 co-relation queries the response was YES. [2023-01-27 21:37:39,430 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8302 conditions, 1370 events. 625/1370 cut-off events. For 14056/14056 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 9032 event pairs, 24 based on Foata normal form. 10/1376 useless extension candidates. Maximal degree in co-relation 7761. Up to 583 conditions per place. [2023-01-27 21:37:39,434 INFO L137 encePairwiseOnDemand]: 144/152 looper letters, 182 selfloop transitions, 83 changer transitions 44/309 dead transitions. [2023-01-27 21:37:39,434 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 309 transitions, 3955 flow [2023-01-27 21:37:39,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-01-27 21:37:39,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-01-27 21:37:39,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1057 transitions. [2023-01-27 21:37:39,436 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40905572755417957 [2023-01-27 21:37:39,436 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1057 transitions. [2023-01-27 21:37:39,436 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1057 transitions. [2023-01-27 21:37:39,436 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:37:39,436 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1057 transitions. [2023-01-27 21:37:39,437 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 62.1764705882353) internal successors, (1057), 17 states have internal predecessors, (1057), 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 21:37:39,439 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 152.0) internal successors, (2736), 18 states have internal predecessors, (2736), 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 21:37:39,439 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 152.0) internal successors, (2736), 18 states have internal predecessors, (2736), 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 21:37:39,439 INFO L175 Difference]: Start difference. First operand has 217 places, 243 transitions, 2985 flow. Second operand 17 states and 1057 transitions. [2023-01-27 21:37:39,439 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 309 transitions, 3955 flow [2023-01-27 21:37:39,503 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 309 transitions, 3131 flow, removed 297 selfloop flow, removed 33 redundant places. [2023-01-27 21:37:39,506 INFO L231 Difference]: Finished difference. Result has 198 places, 236 transitions, 2394 flow [2023-01-27 21:37:39,506 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=2278, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=2394, PETRI_PLACES=198, PETRI_TRANSITIONS=236} [2023-01-27 21:37:39,506 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 178 predicate places. [2023-01-27 21:37:39,506 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 236 transitions, 2394 flow [2023-01-27 21:37:39,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 57.73684210526316) internal successors, (1097), 19 states have internal predecessors, (1097), 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 21:37:39,506 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:37:39,507 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:37:39,511 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-01-27 21:37:39,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:37:39,707 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 21:37:39,707 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:37:39,707 INFO L85 PathProgramCache]: Analyzing trace with hash 644016598, now seen corresponding path program 12 times [2023-01-27 21:37:39,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:37:39,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661314060] [2023-01-27 21:37:39,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:37:39,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:37:39,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:37:39,847 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 21:37:39,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:37:39,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661314060] [2023-01-27 21:37:39,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661314060] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:37:39,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359141200] [2023-01-27 21:37:39,848 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-27 21:37:39,848 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:37:39,848 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:37:39,849 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 21:37:39,851 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-01-27 21:37:39,902 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-01-27 21:37:39,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:37:39,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 29 conjunts are in the unsatisfiable core [2023-01-27 21:37:39,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:37:40,055 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:37:40,055 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:37:40,263 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:37:40,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1359141200] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:37:40,263 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:37:40,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 22 [2023-01-27 21:37:40,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121753641] [2023-01-27 21:37:40,264 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:37:40,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-01-27 21:37:40,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:37:40,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-01-27 21:37:40,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=448, Unknown=0, NotChecked=0, Total=552 [2023-01-27 21:37:40,265 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 152 [2023-01-27 21:37:40,266 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 236 transitions, 2394 flow. Second operand has 24 states, 24 states have (on average 57.875) internal successors, (1389), 24 states have internal predecessors, (1389), 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 21:37:40,266 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:37:40,266 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 152 [2023-01-27 21:37:40,266 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:37:42,050 INFO L130 PetriNetUnfolder]: 574/1252 cut-off events. [2023-01-27 21:37:42,050 INFO L131 PetriNetUnfolder]: For 10627/10627 co-relation queries the response was YES. [2023-01-27 21:37:42,053 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6582 conditions, 1252 events. 574/1252 cut-off events. For 10627/10627 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 8099 event pairs, 6 based on Foata normal form. 9/1257 useless extension candidates. Maximal degree in co-relation 6396. Up to 299 conditions per place. [2023-01-27 21:37:42,058 INFO L137 encePairwiseOnDemand]: 144/152 looper letters, 219 selfloop transitions, 154 changer transitions 42/415 dead transitions. [2023-01-27 21:37:42,059 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 415 transitions, 4204 flow [2023-01-27 21:37:42,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2023-01-27 21:37:42,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2023-01-27 21:37:42,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 3210 transitions. [2023-01-27 21:37:42,061 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4061234817813765 [2023-01-27 21:37:42,061 INFO L72 ComplementDD]: Start complementDD. Operand 52 states and 3210 transitions. [2023-01-27 21:37:42,061 INFO L73 IsDeterministic]: Start isDeterministic. Operand 52 states and 3210 transitions. [2023-01-27 21:37:42,062 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:37:42,062 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 52 states and 3210 transitions. [2023-01-27 21:37:42,065 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 53 states, 52 states have (on average 61.73076923076923) internal successors, (3210), 52 states have internal predecessors, (3210), 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 21:37:42,069 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 53 states, 53 states have (on average 152.0) internal successors, (8056), 53 states have internal predecessors, (8056), 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 21:37:42,069 INFO L81 ComplementDD]: Finished complementDD. Result has 53 states, 53 states have (on average 152.0) internal successors, (8056), 53 states have internal predecessors, (8056), 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 21:37:42,069 INFO L175 Difference]: Start difference. First operand has 198 places, 236 transitions, 2394 flow. Second operand 52 states and 3210 transitions. [2023-01-27 21:37:42,069 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 415 transitions, 4204 flow [2023-01-27 21:37:42,102 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 415 transitions, 3734 flow, removed 114 selfloop flow, removed 22 redundant places. [2023-01-27 21:37:42,106 INFO L231 Difference]: Finished difference. Result has 232 places, 236 transitions, 2576 flow [2023-01-27 21:37:42,106 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=2115, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=145, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=52, PETRI_FLOW=2576, PETRI_PLACES=232, PETRI_TRANSITIONS=236} [2023-01-27 21:37:42,107 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 212 predicate places. [2023-01-27 21:37:42,107 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 236 transitions, 2576 flow [2023-01-27 21:37:42,107 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 57.875) internal successors, (1389), 24 states have internal predecessors, (1389), 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 21:37:42,107 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:37:42,107 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:37:42,111 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-01-27 21:37:42,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:37:42,311 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 21:37:42,312 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:37:42,312 INFO L85 PathProgramCache]: Analyzing trace with hash -677900520, now seen corresponding path program 13 times [2023-01-27 21:37:42,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:37:42,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239331023] [2023-01-27 21:37:42,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:37:42,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:37:42,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:37:42,434 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 21:37:42,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:37:42,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239331023] [2023-01-27 21:37:42,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239331023] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:37:42,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134255336] [2023-01-27 21:37:42,435 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-27 21:37:42,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:37:42,435 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:37:42,436 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 21:37:42,438 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-01-27 21:37:42,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:37:42,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 29 conjunts are in the unsatisfiable core [2023-01-27 21:37:42,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:37:42,627 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:37:42,627 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:37:42,759 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:37:42,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2134255336] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:37:42,760 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:37:42,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 22 [2023-01-27 21:37:42,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874021695] [2023-01-27 21:37:42,760 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:37:42,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-01-27 21:37:42,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:37:42,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-01-27 21:37:42,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=441, Unknown=0, NotChecked=0, Total=552 [2023-01-27 21:37:42,761 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 152 [2023-01-27 21:37:42,762 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 236 transitions, 2576 flow. Second operand has 24 states, 24 states have (on average 57.916666666666664) internal successors, (1390), 24 states have internal predecessors, (1390), 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 21:37:42,762 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:37:42,762 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 152 [2023-01-27 21:37:42,762 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:37:43,457 INFO L130 PetriNetUnfolder]: 552/1188 cut-off events. [2023-01-27 21:37:43,457 INFO L131 PetriNetUnfolder]: For 8278/8278 co-relation queries the response was YES. [2023-01-27 21:37:43,460 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6347 conditions, 1188 events. 552/1188 cut-off events. For 8278/8278 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 7464 event pairs, 10 based on Foata normal form. 3/1187 useless extension candidates. Maximal degree in co-relation 6208. Up to 307 conditions per place. [2023-01-27 21:37:43,462 INFO L137 encePairwiseOnDemand]: 144/152 looper letters, 145 selfloop transitions, 141 changer transitions 36/322 dead transitions. [2023-01-27 21:37:43,462 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 322 transitions, 3658 flow [2023-01-27 21:37:43,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-01-27 21:37:43,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-01-27 21:37:43,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1431 transitions. [2023-01-27 21:37:43,466 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.409324942791762 [2023-01-27 21:37:43,466 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1431 transitions. [2023-01-27 21:37:43,466 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1431 transitions. [2023-01-27 21:37:43,466 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:37:43,466 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1431 transitions. [2023-01-27 21:37:43,468 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 62.21739130434783) internal successors, (1431), 23 states have internal predecessors, (1431), 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 21:37:43,470 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 152.0) internal successors, (3648), 24 states have internal predecessors, (3648), 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 21:37:43,470 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 152.0) internal successors, (3648), 24 states have internal predecessors, (3648), 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 21:37:43,470 INFO L175 Difference]: Start difference. First operand has 232 places, 236 transitions, 2576 flow. Second operand 23 states and 1431 transitions. [2023-01-27 21:37:43,470 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 322 transitions, 3658 flow [2023-01-27 21:37:43,498 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 322 transitions, 3333 flow, removed 77 selfloop flow, removed 29 redundant places. [2023-01-27 21:37:43,502 INFO L231 Difference]: Finished difference. Result has 217 places, 233 transitions, 2639 flow [2023-01-27 21:37:43,502 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=2299, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=2639, PETRI_PLACES=217, PETRI_TRANSITIONS=233} [2023-01-27 21:37:43,503 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 197 predicate places. [2023-01-27 21:37:43,503 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 233 transitions, 2639 flow [2023-01-27 21:37:43,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 57.916666666666664) internal successors, (1390), 24 states have internal predecessors, (1390), 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 21:37:43,503 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:37:43,503 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:37:43,509 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-01-27 21:37:43,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-01-27 21:37:43,708 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 21:37:43,708 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:37:43,708 INFO L85 PathProgramCache]: Analyzing trace with hash 948168439, now seen corresponding path program 4 times [2023-01-27 21:37:43,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:37:43,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59770347] [2023-01-27 21:37:43,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:37:43,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:37:43,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:37:43,805 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:37:43,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:37:43,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59770347] [2023-01-27 21:37:43,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59770347] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:37:43,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286232894] [2023-01-27 21:37:43,805 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-27 21:37:43,805 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:37:43,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:37:43,809 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 21:37:43,811 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-01-27 21:37:43,860 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-27 21:37:43,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:37:43,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 25 conjunts are in the unsatisfiable core [2023-01-27 21:37:43,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:37:43,966 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:37:43,966 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:37:44,079 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 21:37:44,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1286232894] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:37:44,079 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:37:44,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2023-01-27 21:37:44,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626087652] [2023-01-27 21:37:44,079 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:37:44,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-01-27 21:37:44,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:37:44,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-01-27 21:37:44,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2023-01-27 21:37:44,082 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 152 [2023-01-27 21:37:44,083 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 233 transitions, 2639 flow. Second operand has 20 states, 20 states have (on average 57.75) internal successors, (1155), 20 states have internal predecessors, (1155), 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 21:37:44,083 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:37:44,083 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 152 [2023-01-27 21:37:44,083 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:37:44,551 INFO L130 PetriNetUnfolder]: 532/1147 cut-off events. [2023-01-27 21:37:44,552 INFO L131 PetriNetUnfolder]: For 8132/8132 co-relation queries the response was YES. [2023-01-27 21:37:44,555 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6162 conditions, 1147 events. 532/1147 cut-off events. For 8132/8132 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 7147 event pairs, 10 based on Foata normal form. 10/1153 useless extension candidates. Maximal degree in co-relation 5956. Up to 341 conditions per place. [2023-01-27 21:37:44,558 INFO L137 encePairwiseOnDemand]: 144/152 looper letters, 173 selfloop transitions, 90 changer transitions 50/313 dead transitions. [2023-01-27 21:37:44,558 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 313 transitions, 3653 flow [2023-01-27 21:37:44,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-01-27 21:37:44,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-01-27 21:37:44,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1299 transitions. [2023-01-27 21:37:44,559 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4069548872180451 [2023-01-27 21:37:44,559 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1299 transitions. [2023-01-27 21:37:44,559 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1299 transitions. [2023-01-27 21:37:44,560 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:37:44,560 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1299 transitions. [2023-01-27 21:37:44,561 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 61.857142857142854) internal successors, (1299), 21 states have internal predecessors, (1299), 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 21:37:44,562 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 152.0) internal successors, (3344), 22 states have internal predecessors, (3344), 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 21:37:44,562 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 152.0) internal successors, (3344), 22 states have internal predecessors, (3344), 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 21:37:44,563 INFO L175 Difference]: Start difference. First operand has 217 places, 233 transitions, 2639 flow. Second operand 21 states and 1299 transitions. [2023-01-27 21:37:44,563 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 313 transitions, 3653 flow [2023-01-27 21:37:44,593 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 313 transitions, 3319 flow, removed 80 selfloop flow, removed 15 redundant places. [2023-01-27 21:37:44,597 INFO L231 Difference]: Finished difference. Result has 221 places, 216 transitions, 2336 flow [2023-01-27 21:37:44,597 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=2335, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=2336, PETRI_PLACES=221, PETRI_TRANSITIONS=216} [2023-01-27 21:37:44,597 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 201 predicate places. [2023-01-27 21:37:44,597 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 216 transitions, 2336 flow [2023-01-27 21:37:44,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 57.75) internal successors, (1155), 20 states have internal predecessors, (1155), 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 21:37:44,598 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:37:44,598 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:37:44,607 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-01-27 21:37:44,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:37:44,807 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 21:37:44,807 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:37:44,807 INFO L85 PathProgramCache]: Analyzing trace with hash -731371048, now seen corresponding path program 14 times [2023-01-27 21:37:44,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:37:44,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796613003] [2023-01-27 21:37:44,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:37:44,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:37:44,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:37:44,924 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:37:44,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:37:44,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796613003] [2023-01-27 21:37:44,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796613003] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:37:44,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987251742] [2023-01-27 21:37:44,924 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 21:37:44,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:37:44,925 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:37:44,925 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 21:37:44,928 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-01-27 21:37:44,980 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 21:37:44,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:37:44,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 29 conjunts are in the unsatisfiable core [2023-01-27 21:37:44,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:37:45,132 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:37:45,132 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:37:45,328 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:37:45,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [987251742] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:37:45,329 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:37:45,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 22 [2023-01-27 21:37:45,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570523117] [2023-01-27 21:37:45,329 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:37:45,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-01-27 21:37:45,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:37:45,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-01-27 21:37:45,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=445, Unknown=0, NotChecked=0, Total=552 [2023-01-27 21:37:45,331 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 152 [2023-01-27 21:37:45,332 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 216 transitions, 2336 flow. Second operand has 24 states, 24 states have (on average 57.833333333333336) internal successors, (1388), 24 states have internal predecessors, (1388), 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 21:37:45,332 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:37:45,332 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 152 [2023-01-27 21:37:45,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:37:46,363 INFO L130 PetriNetUnfolder]: 573/1253 cut-off events. [2023-01-27 21:37:46,363 INFO L131 PetriNetUnfolder]: For 9713/9713 co-relation queries the response was YES. [2023-01-27 21:37:46,366 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6690 conditions, 1253 events. 573/1253 cut-off events. For 9713/9713 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 8092 event pairs, 6 based on Foata normal form. 13/1262 useless extension candidates. Maximal degree in co-relation 6613. Up to 343 conditions per place. [2023-01-27 21:37:46,369 INFO L137 encePairwiseOnDemand]: 144/152 looper letters, 139 selfloop transitions, 144 changer transitions 94/377 dead transitions. [2023-01-27 21:37:46,369 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 377 transitions, 4416 flow [2023-01-27 21:37:46,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-01-27 21:37:46,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2023-01-27 21:37:46,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 2369 transitions. [2023-01-27 21:37:46,374 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39962887989203777 [2023-01-27 21:37:46,374 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 2369 transitions. [2023-01-27 21:37:46,374 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 2369 transitions. [2023-01-27 21:37:46,375 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:37:46,375 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 2369 transitions. [2023-01-27 21:37:46,377 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 60.743589743589745) internal successors, (2369), 39 states have internal predecessors, (2369), 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 21:37:46,380 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 152.0) internal successors, (6080), 40 states have internal predecessors, (6080), 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 21:37:46,380 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 152.0) internal successors, (6080), 40 states have internal predecessors, (6080), 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 21:37:46,380 INFO L175 Difference]: Start difference. First operand has 221 places, 216 transitions, 2336 flow. Second operand 39 states and 2369 transitions. [2023-01-27 21:37:46,380 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 377 transitions, 4416 flow [2023-01-27 21:37:46,413 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 377 transitions, 4066 flow, removed 60 selfloop flow, removed 26 redundant places. [2023-01-27 21:37:46,417 INFO L231 Difference]: Finished difference. Result has 228 places, 211 transitions, 2624 flow [2023-01-27 21:37:46,417 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=2054, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=2624, PETRI_PLACES=228, PETRI_TRANSITIONS=211} [2023-01-27 21:37:46,417 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 208 predicate places. [2023-01-27 21:37:46,417 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 211 transitions, 2624 flow [2023-01-27 21:37:46,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 57.833333333333336) internal successors, (1388), 24 states have internal predecessors, (1388), 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 21:37:46,418 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:37:46,418 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:37:46,424 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-01-27 21:37:46,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:37:46,622 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 21:37:46,622 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:37:46,623 INFO L85 PathProgramCache]: Analyzing trace with hash 767361305, now seen corresponding path program 5 times [2023-01-27 21:37:46,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:37:46,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015854070] [2023-01-27 21:37:46,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:37:46,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:37:46,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:37:46,748 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:37:46,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:37:46,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015854070] [2023-01-27 21:37:46,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015854070] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:37:46,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105050935] [2023-01-27 21:37:46,748 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-27 21:37:46,748 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:37:46,748 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:37:46,749 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 21:37:46,778 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-01-27 21:37:46,805 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-01-27 21:37:46,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:37:46,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 25 conjunts are in the unsatisfiable core [2023-01-27 21:37:46,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:37:46,926 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:37:46,926 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:37:47,009 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:37:47,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2105050935] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:37:47,010 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:37:47,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2023-01-27 21:37:47,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179267073] [2023-01-27 21:37:47,010 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:37:47,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-01-27 21:37:47,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:37:47,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-01-27 21:37:47,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2023-01-27 21:37:47,011 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 152 [2023-01-27 21:37:47,012 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 211 transitions, 2624 flow. Second operand has 20 states, 20 states have (on average 57.65) internal successors, (1153), 20 states have internal predecessors, (1153), 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 21:37:47,012 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:37:47,012 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 152 [2023-01-27 21:37:47,012 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:37:47,653 INFO L130 PetriNetUnfolder]: 488/1033 cut-off events. [2023-01-27 21:37:47,654 INFO L131 PetriNetUnfolder]: For 8940/8940 co-relation queries the response was YES. [2023-01-27 21:37:47,656 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5916 conditions, 1033 events. 488/1033 cut-off events. For 8940/8940 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 6133 event pairs, 12 based on Foata normal form. 14/1047 useless extension candidates. Maximal degree in co-relation 5861. Up to 307 conditions per place. [2023-01-27 21:37:47,659 INFO L137 encePairwiseOnDemand]: 144/152 looper letters, 172 selfloop transitions, 102 changer transitions 33/307 dead transitions. [2023-01-27 21:37:47,659 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 307 transitions, 4032 flow [2023-01-27 21:37:47,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-01-27 21:37:47,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-01-27 21:37:47,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1475 transitions. [2023-01-27 21:37:47,661 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4043311403508772 [2023-01-27 21:37:47,661 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1475 transitions. [2023-01-27 21:37:47,661 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1475 transitions. [2023-01-27 21:37:47,661 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:37:47,661 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1475 transitions. [2023-01-27 21:37:47,662 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 61.458333333333336) internal successors, (1475), 24 states have internal predecessors, (1475), 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 21:37:47,664 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 152.0) internal successors, (3800), 25 states have internal predecessors, (3800), 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 21:37:47,664 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 152.0) internal successors, (3800), 25 states have internal predecessors, (3800), 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 21:37:47,664 INFO L175 Difference]: Start difference. First operand has 228 places, 211 transitions, 2624 flow. Second operand 24 states and 1475 transitions. [2023-01-27 21:37:47,664 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 307 transitions, 4032 flow [2023-01-27 21:37:47,693 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 307 transitions, 3591 flow, removed 146 selfloop flow, removed 32 redundant places. [2023-01-27 21:37:47,696 INFO L231 Difference]: Finished difference. Result has 191 places, 216 transitions, 2510 flow [2023-01-27 21:37:47,697 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=2290, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=2510, PETRI_PLACES=191, PETRI_TRANSITIONS=216} [2023-01-27 21:37:47,697 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 171 predicate places. [2023-01-27 21:37:47,697 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 216 transitions, 2510 flow [2023-01-27 21:37:47,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 57.65) internal successors, (1153), 20 states have internal predecessors, (1153), 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 21:37:47,697 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:37:47,697 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:37:47,704 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-01-27 21:37:47,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:37:47,901 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 21:37:47,901 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:37:47,901 INFO L85 PathProgramCache]: Analyzing trace with hash 1622667959, now seen corresponding path program 6 times [2023-01-27 21:37:47,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:37:47,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979927584] [2023-01-27 21:37:47,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:37:47,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:37:47,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:37:48,036 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:37:48,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:37:48,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979927584] [2023-01-27 21:37:48,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979927584] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:37:48,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668864398] [2023-01-27 21:37:48,037 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-27 21:37:48,037 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:37:48,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:37:48,038 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 21:37:48,046 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-01-27 21:37:48,099 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-01-27 21:37:48,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:37:48,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 25 conjunts are in the unsatisfiable core [2023-01-27 21:37:48,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:37:48,210 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:37:48,210 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:37:48,299 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:37:48,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1668864398] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:37:48,299 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:37:48,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2023-01-27 21:37:48,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488826589] [2023-01-27 21:37:48,299 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:37:48,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-01-27 21:37:48,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:37:48,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-01-27 21:37:48,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2023-01-27 21:37:48,300 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 152 [2023-01-27 21:37:48,301 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 216 transitions, 2510 flow. Second operand has 20 states, 20 states have (on average 57.65) internal successors, (1153), 20 states have internal predecessors, (1153), 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 21:37:48,301 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:37:48,301 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 152 [2023-01-27 21:37:48,301 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:37:48,761 INFO L130 PetriNetUnfolder]: 506/1046 cut-off events. [2023-01-27 21:37:48,761 INFO L131 PetriNetUnfolder]: For 7465/7465 co-relation queries the response was YES. [2023-01-27 21:37:48,763 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5782 conditions, 1046 events. 506/1046 cut-off events. For 7465/7465 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 6101 event pairs, 8 based on Foata normal form. 5/1051 useless extension candidates. Maximal degree in co-relation 5735. Up to 329 conditions per place. [2023-01-27 21:37:48,766 INFO L137 encePairwiseOnDemand]: 144/152 looper letters, 183 selfloop transitions, 111 changer transitions 17/311 dead transitions. [2023-01-27 21:37:48,766 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 311 transitions, 3841 flow [2023-01-27 21:37:48,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-01-27 21:37:48,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-01-27 21:37:48,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1182 transitions. [2023-01-27 21:37:48,774 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4092797783933518 [2023-01-27 21:37:48,774 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1182 transitions. [2023-01-27 21:37:48,774 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1182 transitions. [2023-01-27 21:37:48,774 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:37:48,774 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1182 transitions. [2023-01-27 21:37:48,775 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 62.21052631578947) internal successors, (1182), 19 states have internal predecessors, (1182), 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 21:37:48,776 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 152.0) internal successors, (3040), 20 states have internal predecessors, (3040), 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 21:37:48,776 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 152.0) internal successors, (3040), 20 states have internal predecessors, (3040), 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 21:37:48,776 INFO L175 Difference]: Start difference. First operand has 191 places, 216 transitions, 2510 flow. Second operand 19 states and 1182 transitions. [2023-01-27 21:37:48,776 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 311 transitions, 3841 flow [2023-01-27 21:37:48,804 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 311 transitions, 3616 flow, removed 54 selfloop flow, removed 17 redundant places. [2023-01-27 21:37:48,807 INFO L231 Difference]: Finished difference. Result has 194 places, 240 transitions, 2941 flow [2023-01-27 21:37:48,807 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=2338, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=2941, PETRI_PLACES=194, PETRI_TRANSITIONS=240} [2023-01-27 21:37:48,808 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 174 predicate places. [2023-01-27 21:37:48,808 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 240 transitions, 2941 flow [2023-01-27 21:37:48,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 57.65) internal successors, (1153), 20 states have internal predecessors, (1153), 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 21:37:48,808 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:37:48,808 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:37:48,813 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-01-27 21:37:49,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-01-27 21:37:49,013 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 21:37:49,013 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:37:49,013 INFO L85 PathProgramCache]: Analyzing trace with hash 1548978479, now seen corresponding path program 7 times [2023-01-27 21:37:49,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:37:49,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271039053] [2023-01-27 21:37:49,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:37:49,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:37:49,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:37:49,108 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:37:49,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:37:49,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271039053] [2023-01-27 21:37:49,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271039053] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:37:49,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86429320] [2023-01-27 21:37:49,108 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-27 21:37:49,108 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:37:49,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:37:49,109 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 21:37:49,120 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-01-27 21:37:49,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:37:49,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 25 conjunts are in the unsatisfiable core [2023-01-27 21:37:49,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:37:49,273 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:37:49,274 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:37:49,371 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:37:49,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [86429320] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:37:49,371 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:37:49,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2023-01-27 21:37:49,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653639670] [2023-01-27 21:37:49,371 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:37:49,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-01-27 21:37:49,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:37:49,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-01-27 21:37:49,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2023-01-27 21:37:49,372 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 152 [2023-01-27 21:37:49,373 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 240 transitions, 2941 flow. Second operand has 20 states, 20 states have (on average 57.75) internal successors, (1155), 20 states have internal predecessors, (1155), 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 21:37:49,373 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:37:49,373 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 152 [2023-01-27 21:37:49,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:37:49,875 INFO L130 PetriNetUnfolder]: 499/1021 cut-off events. [2023-01-27 21:37:49,876 INFO L131 PetriNetUnfolder]: For 7989/7989 co-relation queries the response was YES. [2023-01-27 21:37:49,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5896 conditions, 1021 events. 499/1021 cut-off events. For 7989/7989 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 5885 event pairs, 8 based on Foata normal form. 3/1024 useless extension candidates. Maximal degree in co-relation 5845. Up to 329 conditions per place. [2023-01-27 21:37:49,881 INFO L137 encePairwiseOnDemand]: 144/152 looper letters, 178 selfloop transitions, 101 changer transitions 19/298 dead transitions. [2023-01-27 21:37:49,881 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 298 transitions, 3838 flow [2023-01-27 21:37:49,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-01-27 21:37:49,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-01-27 21:37:49,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1170 transitions. [2023-01-27 21:37:49,890 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4051246537396122 [2023-01-27 21:37:49,890 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1170 transitions. [2023-01-27 21:37:49,890 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1170 transitions. [2023-01-27 21:37:49,890 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:37:49,890 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1170 transitions. [2023-01-27 21:37:49,891 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 61.578947368421055) internal successors, (1170), 19 states have internal predecessors, (1170), 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 21:37:49,892 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 152.0) internal successors, (3040), 20 states have internal predecessors, (3040), 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 21:37:49,892 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 152.0) internal successors, (3040), 20 states have internal predecessors, (3040), 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 21:37:49,892 INFO L175 Difference]: Start difference. First operand has 194 places, 240 transitions, 2941 flow. Second operand 19 states and 1170 transitions. [2023-01-27 21:37:49,892 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 298 transitions, 3838 flow [2023-01-27 21:37:49,957 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 298 transitions, 3706 flow, removed 27 selfloop flow, removed 10 redundant places. [2023-01-27 21:37:49,960 INFO L231 Difference]: Finished difference. Result has 202 places, 238 transitions, 3009 flow [2023-01-27 21:37:49,960 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=2825, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=3009, PETRI_PLACES=202, PETRI_TRANSITIONS=238} [2023-01-27 21:37:49,960 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 182 predicate places. [2023-01-27 21:37:49,961 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 238 transitions, 3009 flow [2023-01-27 21:37:49,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 57.75) internal successors, (1155), 20 states have internal predecessors, (1155), 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 21:37:49,961 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:37:49,961 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:37:49,965 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-01-27 21:37:50,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-01-27 21:37:50,165 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 21:37:50,166 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:37:50,166 INFO L85 PathProgramCache]: Analyzing trace with hash 240012320, now seen corresponding path program 15 times [2023-01-27 21:37:50,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:37:50,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712720746] [2023-01-27 21:37:50,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:37:50,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:37:50,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:37:50,282 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:37:50,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:37:50,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712720746] [2023-01-27 21:37:50,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712720746] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:37:50,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82629241] [2023-01-27 21:37:50,282 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-27 21:37:50,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:37:50,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:37:50,283 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 21:37:50,286 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-01-27 21:37:50,340 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-01-27 21:37:50,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:37:50,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 29 conjunts are in the unsatisfiable core [2023-01-27 21:37:50,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:37:50,516 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:37:50,516 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:37:50,731 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:37:50,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [82629241] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:37:50,731 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:37:50,731 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 22 [2023-01-27 21:37:50,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538829786] [2023-01-27 21:37:50,731 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:37:50,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-01-27 21:37:50,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:37:50,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-01-27 21:37:50,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2023-01-27 21:37:50,733 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 152 [2023-01-27 21:37:50,733 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 238 transitions, 3009 flow. Second operand has 24 states, 24 states have (on average 57.833333333333336) internal successors, (1388), 24 states have internal predecessors, (1388), 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 21:37:50,733 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:37:50,733 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 152 [2023-01-27 21:37:50,733 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:37:51,817 INFO L130 PetriNetUnfolder]: 558/1144 cut-off events. [2023-01-27 21:37:51,817 INFO L131 PetriNetUnfolder]: For 9340/9340 co-relation queries the response was YES. [2023-01-27 21:37:51,820 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6745 conditions, 1144 events. 558/1144 cut-off events. For 9340/9340 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 6777 event pairs, 3 based on Foata normal form. 5/1149 useless extension candidates. Maximal degree in co-relation 6693. Up to 561 conditions per place. [2023-01-27 21:37:51,823 INFO L137 encePairwiseOnDemand]: 144/152 looper letters, 231 selfloop transitions, 85 changer transitions 51/367 dead transitions. [2023-01-27 21:37:51,824 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 367 transitions, 4711 flow [2023-01-27 21:37:51,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-01-27 21:37:51,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-01-27 21:37:51,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 2238 transitions. [2023-01-27 21:37:51,835 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39793741109530584 [2023-01-27 21:37:51,835 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 2238 transitions. [2023-01-27 21:37:51,835 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 2238 transitions. [2023-01-27 21:37:51,835 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:37:51,835 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 2238 transitions. [2023-01-27 21:37:51,837 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 60.486486486486484) internal successors, (2238), 37 states have internal predecessors, (2238), 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 21:37:51,839 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 152.0) internal successors, (5776), 38 states have internal predecessors, (5776), 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 21:37:51,839 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 152.0) internal successors, (5776), 38 states have internal predecessors, (5776), 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 21:37:51,840 INFO L175 Difference]: Start difference. First operand has 202 places, 238 transitions, 3009 flow. Second operand 37 states and 2238 transitions. [2023-01-27 21:37:51,840 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 367 transitions, 4711 flow [2023-01-27 21:37:51,877 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 367 transitions, 4424 flow, removed 49 selfloop flow, removed 17 redundant places. [2023-01-27 21:37:51,881 INFO L231 Difference]: Finished difference. Result has 227 places, 258 transitions, 3410 flow [2023-01-27 21:37:51,881 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=2750, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=3410, PETRI_PLACES=227, PETRI_TRANSITIONS=258} [2023-01-27 21:37:51,885 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 207 predicate places. [2023-01-27 21:37:51,886 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 258 transitions, 3410 flow [2023-01-27 21:37:51,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 57.833333333333336) internal successors, (1388), 24 states have internal predecessors, (1388), 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 21:37:51,886 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:37:51,886 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:37:51,893 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-01-27 21:37:52,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-01-27 21:37:52,091 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 21:37:52,091 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:37:52,091 INFO L85 PathProgramCache]: Analyzing trace with hash 2011172568, now seen corresponding path program 16 times [2023-01-27 21:37:52,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:37:52,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238847829] [2023-01-27 21:37:52,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:37:52,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:37:52,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:37:52,220 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 21:37:52,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:37:52,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238847829] [2023-01-27 21:37:52,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238847829] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:37:52,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098388570] [2023-01-27 21:37:52,221 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-27 21:37:52,221 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:37:52,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:37:52,222 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 21:37:52,224 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-01-27 21:37:52,287 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-27 21:37:52,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:37:52,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 29 conjunts are in the unsatisfiable core [2023-01-27 21:37:52,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:37:52,427 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:37:52,427 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:37:52,556 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:37:52,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2098388570] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:37:52,556 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:37:52,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 22 [2023-01-27 21:37:52,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976123298] [2023-01-27 21:37:52,556 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:37:52,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-01-27 21:37:52,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:37:52,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-01-27 21:37:52,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=443, Unknown=0, NotChecked=0, Total=552 [2023-01-27 21:37:52,557 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 152 [2023-01-27 21:37:52,558 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 258 transitions, 3410 flow. Second operand has 24 states, 24 states have (on average 57.833333333333336) internal successors, (1388), 24 states have internal predecessors, (1388), 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 21:37:52,558 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:37:52,558 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 152 [2023-01-27 21:37:52,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:37:52,957 INFO L130 PetriNetUnfolder]: 521/1041 cut-off events. [2023-01-27 21:37:52,957 INFO L131 PetriNetUnfolder]: For 8851/8851 co-relation queries the response was YES. [2023-01-27 21:37:52,960 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6454 conditions, 1041 events. 521/1041 cut-off events. For 8851/8851 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 5865 event pairs, 7 based on Foata normal form. 3/1044 useless extension candidates. Maximal degree in co-relation 6397. Up to 693 conditions per place. [2023-01-27 21:37:52,962 INFO L137 encePairwiseOnDemand]: 144/152 looper letters, 216 selfloop transitions, 46 changer transitions 30/292 dead transitions. [2023-01-27 21:37:52,963 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 292 transitions, 4160 flow [2023-01-27 21:37:52,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-01-27 21:37:52,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-01-27 21:37:52,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 903 transitions. [2023-01-27 21:37:52,973 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3960526315789474 [2023-01-27 21:37:52,973 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 903 transitions. [2023-01-27 21:37:52,973 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 903 transitions. [2023-01-27 21:37:52,974 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:37:52,974 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 903 transitions. [2023-01-27 21:37:52,974 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 60.2) internal successors, (903), 15 states have internal predecessors, (903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:37:52,976 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 152.0) internal successors, (2432), 16 states have internal predecessors, (2432), 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 21:37:52,976 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 152.0) internal successors, (2432), 16 states have internal predecessors, (2432), 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 21:37:52,976 INFO L175 Difference]: Start difference. First operand has 227 places, 258 transitions, 3410 flow. Second operand 15 states and 903 transitions. [2023-01-27 21:37:52,976 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 292 transitions, 4160 flow [2023-01-27 21:37:53,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 292 transitions, 3690 flow, removed 164 selfloop flow, removed 21 redundant places. [2023-01-27 21:37:53,015 INFO L231 Difference]: Finished difference. Result has 208 places, 253 transitions, 3010 flow [2023-01-27 21:37:53,015 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=2961, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=3010, PETRI_PLACES=208, PETRI_TRANSITIONS=253} [2023-01-27 21:37:53,016 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 188 predicate places. [2023-01-27 21:37:53,016 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 253 transitions, 3010 flow [2023-01-27 21:37:53,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 57.833333333333336) internal successors, (1388), 24 states have internal predecessors, (1388), 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 21:37:53,016 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:37:53,016 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:37:53,020 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-01-27 21:37:53,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:37:53,221 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 21:37:53,221 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:37:53,221 INFO L85 PathProgramCache]: Analyzing trace with hash 1960378635, now seen corresponding path program 8 times [2023-01-27 21:37:53,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:37:53,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094338416] [2023-01-27 21:37:53,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:37:53,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:37:53,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:37:53,312 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:37:53,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:37:53,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094338416] [2023-01-27 21:37:53,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094338416] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:37:53,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245064405] [2023-01-27 21:37:53,312 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 21:37:53,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:37:53,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:37:53,314 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 21:37:53,315 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-01-27 21:37:53,367 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 21:37:53,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:37:53,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 25 conjunts are in the unsatisfiable core [2023-01-27 21:37:53,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:37:53,465 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:37:53,465 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:37:53,568 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 21:37:53,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [245064405] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:37:53,568 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:37:53,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2023-01-27 21:37:53,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101909668] [2023-01-27 21:37:53,569 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:37:53,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-01-27 21:37:53,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:37:53,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-01-27 21:37:53,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2023-01-27 21:37:53,570 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 152 [2023-01-27 21:37:53,570 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 253 transitions, 3010 flow. Second operand has 20 states, 20 states have (on average 57.7) internal successors, (1154), 20 states have internal predecessors, (1154), 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 21:37:53,570 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:37:53,570 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 152 [2023-01-27 21:37:53,571 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:37:54,006 INFO L130 PetriNetUnfolder]: 511/1007 cut-off events. [2023-01-27 21:37:54,006 INFO L131 PetriNetUnfolder]: For 8066/8066 co-relation queries the response was YES. [2023-01-27 21:37:54,008 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5805 conditions, 1007 events. 511/1007 cut-off events. For 8066/8066 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 5546 event pairs, 9 based on Foata normal form. 9/1016 useless extension candidates. Maximal degree in co-relation 5752. Up to 657 conditions per place. [2023-01-27 21:37:54,011 INFO L137 encePairwiseOnDemand]: 144/152 looper letters, 236 selfloop transitions, 31 changer transitions 41/308 dead transitions. [2023-01-27 21:37:54,011 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 308 transitions, 3877 flow [2023-01-27 21:37:54,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-01-27 21:37:54,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-01-27 21:37:54,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1157 transitions. [2023-01-27 21:37:54,014 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4006232686980609 [2023-01-27 21:37:54,014 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1157 transitions. [2023-01-27 21:37:54,014 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1157 transitions. [2023-01-27 21:37:54,015 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:37:54,015 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1157 transitions. [2023-01-27 21:37:54,016 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 60.89473684210526) internal successors, (1157), 19 states have internal predecessors, (1157), 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 21:37:54,017 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 152.0) internal successors, (3040), 20 states have internal predecessors, (3040), 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 21:37:54,017 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 152.0) internal successors, (3040), 20 states have internal predecessors, (3040), 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 21:37:54,017 INFO L175 Difference]: Start difference. First operand has 208 places, 253 transitions, 3010 flow. Second operand 19 states and 1157 transitions. [2023-01-27 21:37:54,017 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 308 transitions, 3877 flow [2023-01-27 21:37:54,053 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 308 transitions, 3653 flow, removed 21 selfloop flow, removed 17 redundant places. [2023-01-27 21:37:54,056 INFO L231 Difference]: Finished difference. Result has 200 places, 241 transitions, 2722 flow [2023-01-27 21:37:54,056 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=2796, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=2722, PETRI_PLACES=200, PETRI_TRANSITIONS=241} [2023-01-27 21:37:54,057 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 180 predicate places. [2023-01-27 21:37:54,057 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 241 transitions, 2722 flow [2023-01-27 21:37:54,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 57.7) internal successors, (1154), 20 states have internal predecessors, (1154), 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 21:37:54,057 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:37:54,057 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:37:54,063 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-01-27 21:37:54,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:37:54,262 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 21:37:54,262 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:37:54,262 INFO L85 PathProgramCache]: Analyzing trace with hash 280573377, now seen corresponding path program 9 times [2023-01-27 21:37:54,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:37:54,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608642685] [2023-01-27 21:37:54,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:37:54,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:37:54,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:37:54,371 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:37:54,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:37:54,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608642685] [2023-01-27 21:37:54,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608642685] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:37:54,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139963785] [2023-01-27 21:37:54,372 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-27 21:37:54,372 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:37:54,372 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:37:54,373 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 21:37:54,375 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-01-27 21:37:54,428 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-27 21:37:54,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:37:54,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 25 conjunts are in the unsatisfiable core [2023-01-27 21:37:54,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:37:54,538 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:37:54,538 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:37:54,642 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 21:37:54,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2139963785] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:37:54,642 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:37:54,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2023-01-27 21:37:54,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146384610] [2023-01-27 21:37:54,642 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:37:54,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-01-27 21:37:54,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:37:54,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-01-27 21:37:54,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2023-01-27 21:37:54,644 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 152 [2023-01-27 21:37:54,644 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 241 transitions, 2722 flow. Second operand has 20 states, 20 states have (on average 57.6) internal successors, (1152), 20 states have internal predecessors, (1152), 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 21:37:54,644 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:37:54,644 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 152 [2023-01-27 21:37:54,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:37:55,133 INFO L130 PetriNetUnfolder]: 463/959 cut-off events. [2023-01-27 21:37:55,133 INFO L131 PetriNetUnfolder]: For 5782/5782 co-relation queries the response was YES. [2023-01-27 21:37:55,135 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5283 conditions, 959 events. 463/959 cut-off events. For 5782/5782 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 5503 event pairs, 7 based on Foata normal form. 7/964 useless extension candidates. Maximal degree in co-relation 5237. Up to 657 conditions per place. [2023-01-27 21:37:55,137 INFO L137 encePairwiseOnDemand]: 144/152 looper letters, 248 selfloop transitions, 28 changer transitions 18/294 dead transitions. [2023-01-27 21:37:55,137 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 294 transitions, 3593 flow [2023-01-27 21:37:55,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-01-27 21:37:55,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-01-27 21:37:55,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1040 transitions. [2023-01-27 21:37:55,138 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4024767801857585 [2023-01-27 21:37:55,138 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1040 transitions. [2023-01-27 21:37:55,138 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1040 transitions. [2023-01-27 21:37:55,138 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:37:55,138 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1040 transitions. [2023-01-27 21:37:55,139 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 61.1764705882353) internal successors, (1040), 17 states have internal predecessors, (1040), 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 21:37:55,141 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 152.0) internal successors, (2736), 18 states have internal predecessors, (2736), 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 21:37:55,141 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 152.0) internal successors, (2736), 18 states have internal predecessors, (2736), 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 21:37:55,141 INFO L175 Difference]: Start difference. First operand has 200 places, 241 transitions, 2722 flow. Second operand 17 states and 1040 transitions. [2023-01-27 21:37:55,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 294 transitions, 3593 flow [2023-01-27 21:37:55,163 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 294 transitions, 3387 flow, removed 31 selfloop flow, removed 16 redundant places. [2023-01-27 21:37:55,166 INFO L231 Difference]: Finished difference. Result has 198 places, 240 transitions, 2638 flow [2023-01-27 21:37:55,166 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=2553, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=2638, PETRI_PLACES=198, PETRI_TRANSITIONS=240} [2023-01-27 21:37:55,166 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 178 predicate places. [2023-01-27 21:37:55,166 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 240 transitions, 2638 flow [2023-01-27 21:37:55,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 57.6) internal successors, (1152), 20 states have internal predecessors, (1152), 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 21:37:55,167 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:37:55,167 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:37:55,171 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-01-27 21:37:55,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2023-01-27 21:37:55,369 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 21:37:55,369 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:37:55,369 INFO L85 PathProgramCache]: Analyzing trace with hash -606930304, now seen corresponding path program 17 times [2023-01-27 21:37:55,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:37:55,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187967709] [2023-01-27 21:37:55,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:37:55,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:37:55,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:37:55,490 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 21:37:55,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:37:55,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187967709] [2023-01-27 21:37:55,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187967709] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:37:55,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145651340] [2023-01-27 21:37:55,490 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-27 21:37:55,491 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:37:55,491 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:37:55,499 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 21:37:55,514 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-01-27 21:37:55,566 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-01-27 21:37:55,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:37:55,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 29 conjunts are in the unsatisfiable core [2023-01-27 21:37:55,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:37:55,749 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:37:55,749 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:37:55,955 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:37:55,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1145651340] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:37:55,956 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:37:55,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 22 [2023-01-27 21:37:55,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355376580] [2023-01-27 21:37:55,956 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:37:55,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-01-27 21:37:55,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:37:55,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-01-27 21:37:55,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2023-01-27 21:37:55,958 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 152 [2023-01-27 21:37:55,959 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 240 transitions, 2638 flow. Second operand has 24 states, 24 states have (on average 57.833333333333336) internal successors, (1388), 24 states have internal predecessors, (1388), 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 21:37:55,959 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:37:55,959 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 152 [2023-01-27 21:37:55,959 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:37:56,940 INFO L130 PetriNetUnfolder]: 478/996 cut-off events. [2023-01-27 21:37:56,940 INFO L131 PetriNetUnfolder]: For 5549/5549 co-relation queries the response was YES. [2023-01-27 21:37:56,942 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5524 conditions, 996 events. 478/996 cut-off events. For 5549/5549 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 5773 event pairs, 3 based on Foata normal form. 3/995 useless extension candidates. Maximal degree in co-relation 5478. Up to 535 conditions per place. [2023-01-27 21:37:56,944 INFO L137 encePairwiseOnDemand]: 144/152 looper letters, 221 selfloop transitions, 78 changer transitions 18/317 dead transitions. [2023-01-27 21:37:56,944 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 317 transitions, 3735 flow [2023-01-27 21:37:56,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-01-27 21:37:56,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-01-27 21:37:56,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 1748 transitions. [2023-01-27 21:37:56,949 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39655172413793105 [2023-01-27 21:37:56,950 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 1748 transitions. [2023-01-27 21:37:56,950 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 1748 transitions. [2023-01-27 21:37:56,950 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:37:56,950 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 1748 transitions. [2023-01-27 21:37:56,952 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 60.275862068965516) internal successors, (1748), 29 states have internal predecessors, (1748), 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 21:37:56,953 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 152.0) internal successors, (4560), 30 states have internal predecessors, (4560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:37:56,954 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 152.0) internal successors, (4560), 30 states have internal predecessors, (4560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:37:56,954 INFO L175 Difference]: Start difference. First operand has 198 places, 240 transitions, 2638 flow. Second operand 29 states and 1748 transitions. [2023-01-27 21:37:56,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 317 transitions, 3735 flow [2023-01-27 21:37:56,973 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 317 transitions, 3663 flow, removed 24 selfloop flow, removed 11 redundant places. [2023-01-27 21:37:56,976 INFO L231 Difference]: Finished difference. Result has 219 places, 251 transitions, 2946 flow [2023-01-27 21:37:56,977 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=2590, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=2946, PETRI_PLACES=219, PETRI_TRANSITIONS=251} [2023-01-27 21:37:56,977 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 199 predicate places. [2023-01-27 21:37:56,978 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 251 transitions, 2946 flow [2023-01-27 21:37:56,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 57.833333333333336) internal successors, (1388), 24 states have internal predecessors, (1388), 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 21:37:56,978 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:37:56,978 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:37:56,983 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-01-27 21:37:57,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2023-01-27 21:37:57,183 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 21:37:57,183 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:37:57,183 INFO L85 PathProgramCache]: Analyzing trace with hash -579224674, now seen corresponding path program 18 times [2023-01-27 21:37:57,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:37:57,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064247382] [2023-01-27 21:37:57,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:37:57,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:37:57,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:37:57,292 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 21:37:57,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:37:57,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064247382] [2023-01-27 21:37:57,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064247382] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:37:57,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300677768] [2023-01-27 21:37:57,293 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-27 21:37:57,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:37:57,293 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:37:57,294 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 21:37:57,295 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-01-27 21:37:57,349 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-01-27 21:37:57,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:37:57,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 29 conjunts are in the unsatisfiable core [2023-01-27 21:37:57,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:37:57,499 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:37:57,499 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:37:57,698 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:37:57,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1300677768] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:37:57,698 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:37:57,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 22 [2023-01-27 21:37:57,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206614311] [2023-01-27 21:37:57,699 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:37:57,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-01-27 21:37:57,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:37:57,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-01-27 21:37:57,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2023-01-27 21:37:57,700 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 152 [2023-01-27 21:37:57,700 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 251 transitions, 2946 flow. Second operand has 24 states, 24 states have (on average 57.833333333333336) internal successors, (1388), 24 states have internal predecessors, (1388), 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 21:37:57,700 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:37:57,700 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 152 [2023-01-27 21:37:57,700 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:37:58,832 INFO L130 PetriNetUnfolder]: 474/971 cut-off events. [2023-01-27 21:37:58,833 INFO L131 PetriNetUnfolder]: For 6452/6452 co-relation queries the response was YES. [2023-01-27 21:37:58,835 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5697 conditions, 971 events. 474/971 cut-off events. For 6452/6452 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 5491 event pairs, 5 based on Foata normal form. 6/975 useless extension candidates. Maximal degree in co-relation 5648. Up to 537 conditions per place. [2023-01-27 21:37:58,837 INFO L137 encePairwiseOnDemand]: 144/152 looper letters, 199 selfloop transitions, 79 changer transitions 39/317 dead transitions. [2023-01-27 21:37:58,837 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 317 transitions, 3925 flow [2023-01-27 21:37:58,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-01-27 21:37:58,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-01-27 21:37:58,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 1922 transitions. [2023-01-27 21:37:58,838 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3951480263157895 [2023-01-27 21:37:58,838 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 1922 transitions. [2023-01-27 21:37:58,838 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 1922 transitions. [2023-01-27 21:37:58,839 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:37:58,839 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 1922 transitions. [2023-01-27 21:37:58,840 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 60.0625) internal successors, (1922), 32 states have internal predecessors, (1922), 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 21:37:58,842 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 152.0) internal successors, (5016), 33 states have internal predecessors, (5016), 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 21:37:58,843 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 152.0) internal successors, (5016), 33 states have internal predecessors, (5016), 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 21:37:58,843 INFO L175 Difference]: Start difference. First operand has 219 places, 251 transitions, 2946 flow. Second operand 32 states and 1922 transitions. [2023-01-27 21:37:58,843 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 317 transitions, 3925 flow [2023-01-27 21:37:58,866 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 317 transitions, 3777 flow, removed 61 selfloop flow, removed 9 redundant places. [2023-01-27 21:37:58,869 INFO L231 Difference]: Finished difference. Result has 235 places, 246 transitions, 2926 flow [2023-01-27 21:37:58,869 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=2815, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=248, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=2926, PETRI_PLACES=235, PETRI_TRANSITIONS=246} [2023-01-27 21:37:58,870 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 215 predicate places. [2023-01-27 21:37:58,870 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 246 transitions, 2926 flow [2023-01-27 21:37:58,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 57.833333333333336) internal successors, (1388), 24 states have internal predecessors, (1388), 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 21:37:58,870 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:37:58,870 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:37:58,874 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2023-01-27 21:37:59,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:37:59,074 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 21:37:59,075 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:37:59,075 INFO L85 PathProgramCache]: Analyzing trace with hash 925330163, now seen corresponding path program 19 times [2023-01-27 21:37:59,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:37:59,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256214564] [2023-01-27 21:37:59,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:37:59,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:37:59,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:37:59,203 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 21:37:59,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:37:59,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256214564] [2023-01-27 21:37:59,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256214564] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:37:59,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48341267] [2023-01-27 21:37:59,204 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-27 21:37:59,204 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:37:59,204 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:37:59,205 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 21:37:59,207 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-01-27 21:37:59,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:37:59,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 33 conjunts are in the unsatisfiable core [2023-01-27 21:37:59,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:37:59,436 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:37:59,436 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:37:59,599 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:37:59,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [48341267] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:37:59,599 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:37:59,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 24 [2023-01-27 21:37:59,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013709820] [2023-01-27 21:37:59,599 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:37:59,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-01-27 21:37:59,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:37:59,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-01-27 21:37:59,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=537, Unknown=0, NotChecked=0, Total=650 [2023-01-27 21:37:59,600 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 152 [2023-01-27 21:37:59,601 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 246 transitions, 2926 flow. Second operand has 26 states, 26 states have (on average 57.80769230769231) internal successors, (1503), 26 states have internal predecessors, (1503), 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 21:37:59,601 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:37:59,601 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 152 [2023-01-27 21:37:59,601 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:38:00,794 INFO L130 PetriNetUnfolder]: 559/1145 cut-off events. [2023-01-27 21:38:00,794 INFO L131 PetriNetUnfolder]: For 7330/7330 co-relation queries the response was YES. [2023-01-27 21:38:00,797 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6914 conditions, 1145 events. 559/1145 cut-off events. For 7330/7330 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 6788 event pairs, 3 based on Foata normal form. 3/1146 useless extension candidates. Maximal degree in co-relation 6863. Up to 419 conditions per place. [2023-01-27 21:38:00,800 INFO L137 encePairwiseOnDemand]: 144/152 looper letters, 180 selfloop transitions, 198 changer transitions 20/398 dead transitions. [2023-01-27 21:38:00,800 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 398 transitions, 4924 flow [2023-01-27 21:38:00,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-01-27 21:38:00,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2023-01-27 21:38:00,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 2539 transitions. [2023-01-27 21:38:00,802 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39771303258145363 [2023-01-27 21:38:00,802 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 2539 transitions. [2023-01-27 21:38:00,802 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 2539 transitions. [2023-01-27 21:38:00,803 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:38:00,803 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 2539 transitions. [2023-01-27 21:38:00,805 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 60.45238095238095) internal successors, (2539), 42 states have internal predecessors, (2539), 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 21:38:00,807 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 152.0) internal successors, (6536), 43 states have internal predecessors, (6536), 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 21:38:00,807 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 152.0) internal successors, (6536), 43 states have internal predecessors, (6536), 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 21:38:00,807 INFO L175 Difference]: Start difference. First operand has 235 places, 246 transitions, 2926 flow. Second operand 42 states and 2539 transitions. [2023-01-27 21:38:00,808 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 398 transitions, 4924 flow [2023-01-27 21:38:00,837 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 398 transitions, 4665 flow, removed 76 selfloop flow, removed 23 redundant places. [2023-01-27 21:38:00,841 INFO L231 Difference]: Finished difference. Result has 247 places, 292 transitions, 3892 flow [2023-01-27 21:38:00,841 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=2699, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=152, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=3892, PETRI_PLACES=247, PETRI_TRANSITIONS=292} [2023-01-27 21:38:00,842 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 227 predicate places. [2023-01-27 21:38:00,842 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 292 transitions, 3892 flow [2023-01-27 21:38:00,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 57.80769230769231) internal successors, (1503), 26 states have internal predecessors, (1503), 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 21:38:00,842 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:38:00,842 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:38:00,847 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-01-27 21:38:01,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:38:01,047 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 21:38:01,047 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:38:01,047 INFO L85 PathProgramCache]: Analyzing trace with hash 1602770469, now seen corresponding path program 20 times [2023-01-27 21:38:01,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:38:01,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498562212] [2023-01-27 21:38:01,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:38:01,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:38:01,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:38:01,189 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 21:38:01,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:38:01,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498562212] [2023-01-27 21:38:01,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498562212] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:38:01,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541053162] [2023-01-27 21:38:01,190 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 21:38:01,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:38:01,191 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:38:01,192 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 21:38:01,193 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-01-27 21:38:01,247 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 21:38:01,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:38:01,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 33 conjunts are in the unsatisfiable core [2023-01-27 21:38:01,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:38:01,421 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:38:01,421 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:38:01,643 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:38:01,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1541053162] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:38:01,643 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:38:01,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 24 [2023-01-27 21:38:01,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215428206] [2023-01-27 21:38:01,644 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:38:01,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-01-27 21:38:01,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:38:01,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-01-27 21:38:01,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=541, Unknown=0, NotChecked=0, Total=650 [2023-01-27 21:38:01,645 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 152 [2023-01-27 21:38:01,646 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 292 transitions, 3892 flow. Second operand has 26 states, 26 states have (on average 57.88461538461539) internal successors, (1505), 26 states have internal predecessors, (1505), 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 21:38:01,646 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:38:01,646 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 152 [2023-01-27 21:38:01,646 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:38:02,845 INFO L130 PetriNetUnfolder]: 549/1111 cut-off events. [2023-01-27 21:38:02,845 INFO L131 PetriNetUnfolder]: For 7722/7722 co-relation queries the response was YES. [2023-01-27 21:38:02,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7262 conditions, 1111 events. 549/1111 cut-off events. For 7722/7722 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 6445 event pairs, 3 based on Foata normal form. 3/1102 useless extension candidates. Maximal degree in co-relation 7206. Up to 367 conditions per place. [2023-01-27 21:38:02,850 INFO L137 encePairwiseOnDemand]: 144/152 looper letters, 167 selfloop transitions, 180 changer transitions 27/374 dead transitions. [2023-01-27 21:38:02,851 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 374 transitions, 5031 flow [2023-01-27 21:38:02,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-01-27 21:38:02,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-01-27 21:38:02,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 2236 transitions. [2023-01-27 21:38:02,852 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39758179231863444 [2023-01-27 21:38:02,852 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 2236 transitions. [2023-01-27 21:38:02,853 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 2236 transitions. [2023-01-27 21:38:02,853 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:38:02,853 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 2236 transitions. [2023-01-27 21:38:02,855 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 60.432432432432435) internal successors, (2236), 37 states have internal predecessors, (2236), 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 21:38:02,857 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 152.0) internal successors, (5776), 38 states have internal predecessors, (5776), 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 21:38:02,857 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 152.0) internal successors, (5776), 38 states have internal predecessors, (5776), 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 21:38:02,857 INFO L175 Difference]: Start difference. First operand has 247 places, 292 transitions, 3892 flow. Second operand 37 states and 2236 transitions. [2023-01-27 21:38:02,857 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 374 transitions, 5031 flow [2023-01-27 21:38:02,892 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 374 transitions, 4764 flow, removed 64 selfloop flow, removed 20 redundant places. [2023-01-27 21:38:02,896 INFO L231 Difference]: Finished difference. Result has 259 places, 285 transitions, 3911 flow [2023-01-27 21:38:02,896 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=3617, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=290, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=180, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=3911, PETRI_PLACES=259, PETRI_TRANSITIONS=285} [2023-01-27 21:38:02,896 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 239 predicate places. [2023-01-27 21:38:02,896 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 285 transitions, 3911 flow [2023-01-27 21:38:02,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 57.88461538461539) internal successors, (1505), 26 states have internal predecessors, (1505), 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 21:38:02,897 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:38:02,897 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:38:02,901 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-01-27 21:38:03,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:38:03,101 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 21:38:03,101 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:38:03,101 INFO L85 PathProgramCache]: Analyzing trace with hash 11806669, now seen corresponding path program 10 times [2023-01-27 21:38:03,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:38:03,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206532984] [2023-01-27 21:38:03,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:38:03,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:38:03,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:38:03,216 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:38:03,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:38:03,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206532984] [2023-01-27 21:38:03,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206532984] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:38:03,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107690541] [2023-01-27 21:38:03,217 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-27 21:38:03,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:38:03,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:38:03,218 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 21:38:03,219 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-01-27 21:38:03,273 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-27 21:38:03,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:38:03,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 29 conjunts are in the unsatisfiable core [2023-01-27 21:38:03,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:38:03,390 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:38:03,390 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:38:03,489 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 21:38:03,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [107690541] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:38:03,489 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:38:03,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 20 [2023-01-27 21:38:03,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908938190] [2023-01-27 21:38:03,489 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:38:03,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-01-27 21:38:03,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:38:03,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-01-27 21:38:03,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2023-01-27 21:38:03,492 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 152 [2023-01-27 21:38:03,492 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 285 transitions, 3911 flow. Second operand has 22 states, 22 states have (on average 57.63636363636363) internal successors, (1268), 22 states have internal predecessors, (1268), 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 21:38:03,492 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:38:03,492 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 152 [2023-01-27 21:38:03,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:38:04,032 INFO L130 PetriNetUnfolder]: 531/1086 cut-off events. [2023-01-27 21:38:04,032 INFO L131 PetriNetUnfolder]: For 7858/7858 co-relation queries the response was YES. [2023-01-27 21:38:04,035 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7218 conditions, 1086 events. 531/1086 cut-off events. For 7858/7858 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 6316 event pairs, 5 based on Foata normal form. 6/1080 useless extension candidates. Maximal degree in co-relation 7165. Up to 739 conditions per place. [2023-01-27 21:38:04,037 INFO L137 encePairwiseOnDemand]: 144/152 looper letters, 233 selfloop transitions, 99 changer transitions 12/344 dead transitions. [2023-01-27 21:38:04,037 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 344 transitions, 4994 flow [2023-01-27 21:38:04,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-01-27 21:38:04,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-01-27 21:38:04,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1331 transitions. [2023-01-27 21:38:04,039 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3980263157894737 [2023-01-27 21:38:04,039 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1331 transitions. [2023-01-27 21:38:04,039 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1331 transitions. [2023-01-27 21:38:04,039 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:38:04,039 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1331 transitions. [2023-01-27 21:38:04,040 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 60.5) internal successors, (1331), 22 states have internal predecessors, (1331), 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 21:38:04,041 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 152.0) internal successors, (3496), 23 states have internal predecessors, (3496), 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 21:38:04,042 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 152.0) internal successors, (3496), 23 states have internal predecessors, (3496), 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 21:38:04,042 INFO L175 Difference]: Start difference. First operand has 259 places, 285 transitions, 3911 flow. Second operand 22 states and 1331 transitions. [2023-01-27 21:38:04,042 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 344 transitions, 4994 flow [2023-01-27 21:38:04,073 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 344 transitions, 4586 flow, removed 9 selfloop flow, removed 32 redundant places. [2023-01-27 21:38:04,078 INFO L231 Difference]: Finished difference. Result has 237 places, 295 transitions, 3944 flow [2023-01-27 21:38:04,078 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=3507, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=3944, PETRI_PLACES=237, PETRI_TRANSITIONS=295} [2023-01-27 21:38:04,078 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 217 predicate places. [2023-01-27 21:38:04,078 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 295 transitions, 3944 flow [2023-01-27 21:38:04,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 57.63636363636363) internal successors, (1268), 22 states have internal predecessors, (1268), 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 21:38:04,078 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:38:04,079 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:38:04,083 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-01-27 21:38:04,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2023-01-27 21:38:04,280 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 21:38:04,281 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:38:04,281 INFO L85 PathProgramCache]: Analyzing trace with hash -61882811, now seen corresponding path program 11 times [2023-01-27 21:38:04,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:38:04,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790936270] [2023-01-27 21:38:04,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:38:04,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:38:04,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:38:04,383 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:38:04,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:38:04,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790936270] [2023-01-27 21:38:04,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790936270] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:38:04,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104655788] [2023-01-27 21:38:04,384 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-27 21:38:04,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:38:04,384 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:38:04,385 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 21:38:04,386 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-01-27 21:38:04,440 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-01-27 21:38:04,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:38:04,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 30 conjunts are in the unsatisfiable core [2023-01-27 21:38:04,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:38:04,594 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:38:04,594 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:38:04,795 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:38:04,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1104655788] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:38:04,796 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:38:04,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 25 [2023-01-27 21:38:04,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270851596] [2023-01-27 21:38:04,796 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:38:04,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-01-27 21:38:04,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:38:04,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-01-27 21:38:04,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=566, Unknown=0, NotChecked=0, Total=702 [2023-01-27 21:38:04,797 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 152 [2023-01-27 21:38:04,798 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 295 transitions, 3944 flow. Second operand has 27 states, 27 states have (on average 57.629629629629626) internal successors, (1556), 27 states have internal predecessors, (1556), 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 21:38:04,798 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:38:04,798 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 152 [2023-01-27 21:38:04,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:38:05,674 INFO L130 PetriNetUnfolder]: 582/1195 cut-off events. [2023-01-27 21:38:05,674 INFO L131 PetriNetUnfolder]: For 8531/8531 co-relation queries the response was YES. [2023-01-27 21:38:05,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7919 conditions, 1195 events. 582/1195 cut-off events. For 8531/8531 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 7177 event pairs, 1 based on Foata normal form. 4/1185 useless extension candidates. Maximal degree in co-relation 7866. Up to 699 conditions per place. [2023-01-27 21:38:05,680 INFO L137 encePairwiseOnDemand]: 144/152 looper letters, 241 selfloop transitions, 117 changer transitions 29/387 dead transitions. [2023-01-27 21:38:05,680 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 387 transitions, 5428 flow [2023-01-27 21:38:05,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-01-27 21:38:05,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-01-27 21:38:05,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 1644 transitions. [2023-01-27 21:38:05,681 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40058479532163743 [2023-01-27 21:38:05,682 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 1644 transitions. [2023-01-27 21:38:05,682 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 1644 transitions. [2023-01-27 21:38:05,682 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:38:05,682 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 1644 transitions. [2023-01-27 21:38:05,683 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 60.888888888888886) internal successors, (1644), 27 states have internal predecessors, (1644), 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 21:38:05,685 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 152.0) internal successors, (4256), 28 states have internal predecessors, (4256), 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 21:38:05,685 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 152.0) internal successors, (4256), 28 states have internal predecessors, (4256), 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 21:38:05,685 INFO L175 Difference]: Start difference. First operand has 237 places, 295 transitions, 3944 flow. Second operand 27 states and 1644 transitions. [2023-01-27 21:38:05,685 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 387 transitions, 5428 flow [2023-01-27 21:38:05,722 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 387 transitions, 5284 flow, removed 30 selfloop flow, removed 12 redundant places. [2023-01-27 21:38:05,726 INFO L231 Difference]: Finished difference. Result has 253 places, 303 transitions, 4207 flow [2023-01-27 21:38:05,726 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=3792, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=293, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=4207, PETRI_PLACES=253, PETRI_TRANSITIONS=303} [2023-01-27 21:38:05,726 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 233 predicate places. [2023-01-27 21:38:05,727 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 303 transitions, 4207 flow [2023-01-27 21:38:05,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 57.629629629629626) internal successors, (1556), 27 states have internal predecessors, (1556), 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 21:38:05,727 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:38:05,727 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:38:05,731 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2023-01-27 21:38:05,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2023-01-27 21:38:05,927 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 21:38:05,928 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:38:05,928 INFO L85 PathProgramCache]: Analyzing trace with hash -905503634, now seen corresponding path program 12 times [2023-01-27 21:38:05,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:38:05,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602185069] [2023-01-27 21:38:05,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:38:05,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:38:05,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:38:06,026 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:38:06,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:38:06,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602185069] [2023-01-27 21:38:06,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602185069] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:38:06,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218153558] [2023-01-27 21:38:06,026 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-27 21:38:06,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:38:06,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:38:06,027 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 21:38:06,027 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-01-27 21:38:06,085 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-01-27 21:38:06,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:38:06,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 29 conjunts are in the unsatisfiable core [2023-01-27 21:38:06,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:38:06,203 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:38:06,203 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:38:06,300 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:38:06,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [218153558] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:38:06,301 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:38:06,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 7] total 18 [2023-01-27 21:38:06,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825912704] [2023-01-27 21:38:06,301 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:38:06,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-01-27 21:38:06,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:38:06,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-01-27 21:38:06,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2023-01-27 21:38:06,302 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 152 [2023-01-27 21:38:06,302 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 303 transitions, 4207 flow. Second operand has 20 states, 20 states have (on average 57.8) internal successors, (1156), 20 states have internal predecessors, (1156), 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 21:38:06,303 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:38:06,303 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 152 [2023-01-27 21:38:06,303 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:38:06,806 INFO L130 PetriNetUnfolder]: 569/1145 cut-off events. [2023-01-27 21:38:06,806 INFO L131 PetriNetUnfolder]: For 8719/8719 co-relation queries the response was YES. [2023-01-27 21:38:06,811 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7948 conditions, 1145 events. 569/1145 cut-off events. For 8719/8719 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 6711 event pairs, 3 based on Foata normal form. 13/1146 useless extension candidates. Maximal degree in co-relation 7890. Up to 413 conditions per place. [2023-01-27 21:38:06,813 INFO L137 encePairwiseOnDemand]: 144/152 looper letters, 76 selfloop transitions, 11 changer transitions 278/365 dead transitions. [2023-01-27 21:38:06,813 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 365 transitions, 5591 flow [2023-01-27 21:38:06,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-01-27 21:38:06,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-01-27 21:38:06,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1318 transitions. [2023-01-27 21:38:06,815 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39413875598086123 [2023-01-27 21:38:06,815 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1318 transitions. [2023-01-27 21:38:06,815 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1318 transitions. [2023-01-27 21:38:06,815 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:38:06,815 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1318 transitions. [2023-01-27 21:38:06,816 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 59.90909090909091) internal successors, (1318), 22 states have internal predecessors, (1318), 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 21:38:06,818 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 152.0) internal successors, (3496), 23 states have internal predecessors, (3496), 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 21:38:06,818 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 152.0) internal successors, (3496), 23 states have internal predecessors, (3496), 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 21:38:06,818 INFO L175 Difference]: Start difference. First operand has 253 places, 303 transitions, 4207 flow. Second operand 22 states and 1318 transitions. [2023-01-27 21:38:06,818 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 365 transitions, 5591 flow [2023-01-27 21:38:06,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 365 transitions, 5266 flow, removed 44 selfloop flow, removed 17 redundant places. [2023-01-27 21:38:06,862 INFO L231 Difference]: Finished difference. Result has 247 places, 83 transitions, 878 flow [2023-01-27 21:38:06,863 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=3902, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=878, PETRI_PLACES=247, PETRI_TRANSITIONS=83} [2023-01-27 21:38:06,863 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 227 predicate places. [2023-01-27 21:38:06,863 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 83 transitions, 878 flow [2023-01-27 21:38:06,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 57.8) internal successors, (1156), 20 states have internal predecessors, (1156), 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 21:38:06,863 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:38:06,863 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:38:06,868 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2023-01-27 21:38:07,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2023-01-27 21:38:07,068 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 21:38:07,068 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:38:07,068 INFO L85 PathProgramCache]: Analyzing trace with hash 1325551673, now seen corresponding path program 13 times [2023-01-27 21:38:07,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:38:07,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244475960] [2023-01-27 21:38:07,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:38:07,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:38:07,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:38:07,194 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:38:07,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:38:07,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244475960] [2023-01-27 21:38:07,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244475960] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:38:07,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104866107] [2023-01-27 21:38:07,194 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-27 21:38:07,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:38:07,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:38:07,195 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 21:38:07,197 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-01-27 21:38:07,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:38:07,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 29 conjunts are in the unsatisfiable core [2023-01-27 21:38:07,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:38:07,382 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:38:07,382 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:38:07,501 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 21:38:07,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1104866107] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:38:07,502 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:38:07,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 20 [2023-01-27 21:38:07,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340020778] [2023-01-27 21:38:07,502 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:38:07,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-01-27 21:38:07,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:38:07,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-01-27 21:38:07,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2023-01-27 21:38:07,504 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 152 [2023-01-27 21:38:07,504 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 83 transitions, 878 flow. Second operand has 22 states, 22 states have (on average 57.59090909090909) internal successors, (1267), 22 states have internal predecessors, (1267), 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 21:38:07,505 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:38:07,505 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 152 [2023-01-27 21:38:07,505 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:38:07,914 INFO L130 PetriNetUnfolder]: 141/308 cut-off events. [2023-01-27 21:38:07,915 INFO L131 PetriNetUnfolder]: For 2336/2336 co-relation queries the response was YES. [2023-01-27 21:38:07,916 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1945 conditions, 308 events. 141/308 cut-off events. For 2336/2336 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 1328 event pairs, 0 based on Foata normal form. 6/302 useless extension candidates. Maximal degree in co-relation 1887. Up to 185 conditions per place. [2023-01-27 21:38:07,916 INFO L137 encePairwiseOnDemand]: 144/152 looper letters, 57 selfloop transitions, 42 changer transitions 19/118 dead transitions. [2023-01-27 21:38:07,916 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 118 transitions, 1411 flow [2023-01-27 21:38:07,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-01-27 21:38:07,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-01-27 21:38:07,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1069 transitions. [2023-01-27 21:38:07,918 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39071637426900585 [2023-01-27 21:38:07,918 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1069 transitions. [2023-01-27 21:38:07,918 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1069 transitions. [2023-01-27 21:38:07,918 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:38:07,918 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1069 transitions. [2023-01-27 21:38:07,919 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 59.388888888888886) internal successors, (1069), 18 states have internal predecessors, (1069), 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 21:38:07,920 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 152.0) internal successors, (2888), 19 states have internal predecessors, (2888), 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 21:38:07,920 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 152.0) internal successors, (2888), 19 states have internal predecessors, (2888), 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 21:38:07,920 INFO L175 Difference]: Start difference. First operand has 247 places, 83 transitions, 878 flow. Second operand 18 states and 1069 transitions. [2023-01-27 21:38:07,920 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 118 transitions, 1411 flow [2023-01-27 21:38:07,925 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 118 transitions, 1085 flow, removed 77 selfloop flow, removed 38 redundant places. [2023-01-27 21:38:07,927 INFO L231 Difference]: Finished difference. Result has 125 places, 86 transitions, 731 flow [2023-01-27 21:38:07,927 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=632, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=731, PETRI_PLACES=125, PETRI_TRANSITIONS=86} [2023-01-27 21:38:07,927 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 105 predicate places. [2023-01-27 21:38:07,927 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 86 transitions, 731 flow [2023-01-27 21:38:07,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 57.59090909090909) internal successors, (1267), 22 states have internal predecessors, (1267), 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 21:38:07,927 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:38:07,927 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:38:07,932 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2023-01-27 21:38:08,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-01-27 21:38:08,129 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 21:38:08,132 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:38:08,132 INFO L85 PathProgramCache]: Analyzing trace with hash -1359978278, now seen corresponding path program 14 times [2023-01-27 21:38:08,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:38:08,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608369429] [2023-01-27 21:38:08,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:38:08,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:38:08,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:38:08,221 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 21:38:08,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:38:08,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608369429] [2023-01-27 21:38:08,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608369429] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:38:08,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828371852] [2023-01-27 21:38:08,222 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 21:38:08,222 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:38:08,222 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:38:08,223 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 21:38:08,225 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-01-27 21:38:08,288 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 21:38:08,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:38:08,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 29 conjunts are in the unsatisfiable core [2023-01-27 21:38:08,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:38:08,394 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:38:08,394 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:38:08,500 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 21:38:08,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [828371852] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:38:08,500 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:38:08,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 7] total 18 [2023-01-27 21:38:08,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273481393] [2023-01-27 21:38:08,500 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:38:08,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-01-27 21:38:08,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:38:08,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-01-27 21:38:08,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2023-01-27 21:38:08,501 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 152 [2023-01-27 21:38:08,502 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 86 transitions, 731 flow. Second operand has 20 states, 20 states have (on average 57.7) internal successors, (1154), 20 states have internal predecessors, (1154), 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 21:38:08,502 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:38:08,502 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 152 [2023-01-27 21:38:08,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:38:08,759 INFO L130 PetriNetUnfolder]: 133/259 cut-off events. [2023-01-27 21:38:08,759 INFO L131 PetriNetUnfolder]: For 502/502 co-relation queries the response was YES. [2023-01-27 21:38:08,759 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1398 conditions, 259 events. 133/259 cut-off events. For 502/502 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 952 event pairs, 0 based on Foata normal form. 3/258 useless extension candidates. Maximal degree in co-relation 1358. Up to 99 conditions per place. [2023-01-27 21:38:08,760 INFO L137 encePairwiseOnDemand]: 144/152 looper letters, 0 selfloop transitions, 0 changer transitions 114/114 dead transitions. [2023-01-27 21:38:08,760 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 114 transitions, 1142 flow [2023-01-27 21:38:08,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-01-27 21:38:08,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-01-27 21:38:08,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 944 transitions. [2023-01-27 21:38:08,761 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3881578947368421 [2023-01-27 21:38:08,761 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 944 transitions. [2023-01-27 21:38:08,761 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 944 transitions. [2023-01-27 21:38:08,761 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:38:08,761 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 944 transitions. [2023-01-27 21:38:08,762 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 59.0) internal successors, (944), 16 states have internal predecessors, (944), 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 21:38:08,763 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 152.0) internal successors, (2584), 17 states have internal predecessors, (2584), 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 21:38:08,763 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 152.0) internal successors, (2584), 17 states have internal predecessors, (2584), 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 21:38:08,763 INFO L175 Difference]: Start difference. First operand has 125 places, 86 transitions, 731 flow. Second operand 16 states and 944 transitions. [2023-01-27 21:38:08,763 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 114 transitions, 1142 flow [2023-01-27 21:38:08,766 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 114 transitions, 1038 flow, removed 13 selfloop flow, removed 16 redundant places. [2023-01-27 21:38:08,766 INFO L231 Difference]: Finished difference. Result has 114 places, 0 transitions, 0 flow [2023-01-27 21:38:08,766 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=152, PETRI_DIFFERENCE_MINUEND_FLOW=631, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=0, PETRI_PLACES=114, PETRI_TRANSITIONS=0} [2023-01-27 21:38:08,767 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 94 predicate places. [2023-01-27 21:38:08,767 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 0 transitions, 0 flow [2023-01-27 21:38:08,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 57.7) internal successors, (1154), 20 states have internal predecessors, (1154), 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 21:38:08,769 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-01-27 21:38:08,769 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-01-27 21:38:08,769 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-01-27 21:38:08,773 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2023-01-27 21:38:08,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-01-27 21:38:08,970 INFO L445 BasicCegarLoop]: Path program histogram: [20, 14, 6] [2023-01-27 21:38:08,972 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-01-27 21:38:08,972 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-01-27 21:38:08,973 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.01 09:38:08 BasicIcfg [2023-01-27 21:38:08,973 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-01-27 21:38:08,974 INFO L158 Benchmark]: Toolchain (without parser) took 54156.13ms. Allocated memory was 553.6MB in the beginning and 799.0MB in the end (delta: 245.4MB). Free memory was 511.2MB in the beginning and 452.5MB in the end (delta: 58.7MB). Peak memory consumption was 305.6MB. Max. memory is 16.0GB. [2023-01-27 21:38:08,974 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 341.8MB. Free memory is still 288.8MB. There was no memory consumed. Max. memory is 16.0GB. [2023-01-27 21:38:08,974 INFO L158 Benchmark]: CACSL2BoogieTranslator took 151.74ms. Allocated memory is still 553.6MB. Free memory was 510.6MB in the beginning and 500.1MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. [2023-01-27 21:38:08,974 INFO L158 Benchmark]: Boogie Procedure Inliner took 19.42ms. Allocated memory is still 553.6MB. Free memory was 500.1MB in the beginning and 498.5MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-01-27 21:38:08,974 INFO L158 Benchmark]: Boogie Preprocessor took 14.12ms. Allocated memory is still 553.6MB. Free memory was 498.5MB in the beginning and 497.2MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-01-27 21:38:08,974 INFO L158 Benchmark]: RCFGBuilder took 378.97ms. Allocated memory is still 553.6MB. Free memory was 497.2MB in the beginning and 481.9MB in the end (delta: 15.3MB). Peak memory consumption was 14.7MB. Max. memory is 16.0GB. [2023-01-27 21:38:08,975 INFO L158 Benchmark]: TraceAbstraction took 53586.96ms. Allocated memory was 553.6MB in the beginning and 799.0MB in the end (delta: 245.4MB). Free memory was 481.2MB in the beginning and 452.5MB in the end (delta: 28.8MB). Peak memory consumption was 276.2MB. Max. memory is 16.0GB. [2023-01-27 21:38:08,975 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 341.8MB. Free memory is still 288.8MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 151.74ms. Allocated memory is still 553.6MB. Free memory was 510.6MB in the beginning and 500.1MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 19.42ms. Allocated memory is still 553.6MB. Free memory was 500.1MB in the beginning and 498.5MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 14.12ms. Allocated memory is still 553.6MB. Free memory was 498.5MB in the beginning and 497.2MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 378.97ms. Allocated memory is still 553.6MB. Free memory was 497.2MB in the beginning and 481.9MB in the end (delta: 15.3MB). Peak memory consumption was 14.7MB. Max. memory is 16.0GB. * TraceAbstraction took 53586.96ms. Allocated memory was 553.6MB in the beginning and 799.0MB in the end (delta: 245.4MB). Free memory was 481.2MB in the beginning and 452.5MB in the end (delta: 28.8MB). Peak memory consumption was 276.2MB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 1.7s, 75 PlacesBefore, 20 PlacesAfterwards, 74 TransitionsBefore, 15 TransitionsAfterwards, 500 CoEnabledTransitionPairs, 6 FixpointIterations, 37 TrivialSequentialCompositions, 17 ConcurrentSequentialCompositions, 6 TrivialYvCompositions, 4 ConcurrentYvCompositions, 4 ChoiceCompositions, 68 TotalNumberOfCompositions, 559 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 539, independent: 535, independent conditional: 0, independent unconditional: 535, dependent: 4, dependent conditional: 0, dependent unconditional: 4, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 279, independent: 277, independent conditional: 0, independent unconditional: 277, dependent: 2, dependent conditional: 0, dependent unconditional: 2, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 539, independent: 258, independent conditional: 0, independent unconditional: 258, dependent: 2, dependent conditional: 0, dependent unconditional: 2, unknown: 279, unknown conditional: 0, unknown unconditional: 279] , Statistics on independence cache: Total cache size (in pairs): 19, Positive cache size: 19, Positive conditional cache size: 0, Positive unconditional cache size: 19, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - PositiveResult [Line: 76]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 99 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 53.5s, OverallIterations: 40, TraceHistogramMax: 4, PathProgramHistogramMax: 20, EmptinessCheckTime: 0.0s, AutomataDifference: 27.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.8s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 5206 SdHoareTripleChecker+Valid, 8.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 5206 mSDsluCounter, 758 SdHoareTripleChecker+Invalid, 6.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 594 mSDsCounter, 716 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 20273 IncrementalHoareTripleChecker+Invalid, 20989 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 716 mSolverCounterUnsat, 164 mSDtfsCounter, 20273 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1942 GetRequests, 544 SyntacticMatches, 51 SemanticMatches, 1347 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16179 ImplicationChecksByTransitivity, 20.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=4207occurred in iteration=37, InterpolantAutomatonStates: 909, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 14.7s InterpolantComputationTime, 1140 NumberOfCodeBlocks, 1140 NumberOfCodeBlocksAsserted, 110 NumberOfCheckSat, 1563 ConstructedInterpolants, 0 QuantifiedInterpolants, 19719 SizeOfPredicates, 138 NumberOfNonLiveVariables, 4304 ConjunctsInSsa, 879 ConjunctsInUnsatCore, 108 InterpolantComputations, 6 PerfectInterpolantSequences, 23/438 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-01-27 21:38:08,991 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...