/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_72-funloop_hard_racing.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-b8dbc81 [2023-01-27 19:19:23,725 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-01-27 19:19:23,726 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-01-27 19:19:23,771 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-01-27 19:19:23,772 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-01-27 19:19:23,775 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-01-27 19:19:23,776 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-01-27 19:19:23,777 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-01-27 19:19:23,778 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-01-27 19:19:23,779 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-01-27 19:19:23,780 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-01-27 19:19:23,780 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-01-27 19:19:23,781 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-01-27 19:19:23,781 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-01-27 19:19:23,782 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-01-27 19:19:23,783 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-01-27 19:19:23,784 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-01-27 19:19:23,784 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-01-27 19:19:23,785 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-01-27 19:19:23,787 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-01-27 19:19:23,788 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-01-27 19:19:23,789 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-01-27 19:19:23,789 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-01-27 19:19:23,790 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-01-27 19:19:23,793 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-01-27 19:19:23,793 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-01-27 19:19:23,793 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-01-27 19:19:23,794 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-01-27 19:19:23,794 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-01-27 19:19:23,795 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-01-27 19:19:23,795 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-01-27 19:19:23,796 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-01-27 19:19:23,796 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-01-27 19:19:23,797 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-01-27 19:19:23,797 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-01-27 19:19:23,798 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-01-27 19:19:23,798 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-01-27 19:19:23,798 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-01-27 19:19:23,799 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-01-27 19:19:23,799 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-01-27 19:19:23,800 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-01-27 19:19:23,804 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf [2023-01-27 19:19:23,838 INFO L113 SettingsManager]: Loading preferences was successful [2023-01-27 19:19:23,839 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-01-27 19:19:23,840 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-01-27 19:19:23,840 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-01-27 19:19:23,841 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-01-27 19:19:23,841 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-01-27 19:19:23,841 INFO L138 SettingsManager]: * Use SBE=true [2023-01-27 19:19:23,841 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-01-27 19:19:23,841 INFO L138 SettingsManager]: * sizeof long=4 [2023-01-27 19:19:23,841 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-01-27 19:19:23,842 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-01-27 19:19:23,842 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-01-27 19:19:23,842 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-01-27 19:19:23,842 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-01-27 19:19:23,843 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-01-27 19:19:23,843 INFO L138 SettingsManager]: * sizeof long double=12 [2023-01-27 19:19:23,843 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-01-27 19:19:23,843 INFO L138 SettingsManager]: * Use constant arrays=true [2023-01-27 19:19:23,843 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-01-27 19:19:23,843 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-01-27 19:19:23,843 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-01-27 19:19:23,843 INFO L138 SettingsManager]: * To the following directory=./dump/ [2023-01-27 19:19:23,844 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-01-27 19:19:23,844 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-27 19:19:23,844 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-01-27 19:19:23,844 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-01-27 19:19:23,844 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-01-27 19:19:23,844 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-01-27 19:19:23,844 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-01-27 19:19:23,844 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-01-27 19:19:23,844 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-01-27 19:19:23,845 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-01-27 19:19:24,044 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-01-27 19:19:24,067 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-01-27 19:19:24,070 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-01-27 19:19:24,071 INFO L271 PluginConnector]: Initializing CDTParser... [2023-01-27 19:19:24,071 INFO L275 PluginConnector]: CDTParser initialized [2023-01-27 19:19:24,072 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_72-funloop_hard_racing.i [2023-01-27 19:19:25,217 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-01-27 19:19:25,463 INFO L351 CDTParser]: Found 1 translation units. [2023-01-27 19:19:25,463 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_72-funloop_hard_racing.i [2023-01-27 19:19:25,490 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fda0f0d11/60efba9af1f74c5e8904946f065d0ac9/FLAG9143e8228 [2023-01-27 19:19:25,501 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fda0f0d11/60efba9af1f74c5e8904946f065d0ac9 [2023-01-27 19:19:25,503 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-01-27 19:19:25,504 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2023-01-27 19:19:25,505 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-01-27 19:19:25,505 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-01-27 19:19:25,509 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-01-27 19:19:25,510 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 07:19:25" (1/1) ... [2023-01-27 19:19:25,511 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@8cdfe67 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:19:25, skipping insertion in model container [2023-01-27 19:19:25,511 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 07:19:25" (1/1) ... [2023-01-27 19:19:25,517 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-01-27 19:19:25,560 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-01-27 19:19:25,918 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_72-funloop_hard_racing.i[41323,41336] [2023-01-27 19:19:25,954 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-27 19:19:25,977 INFO L203 MainTranslator]: Completed pre-run [2023-01-27 19:19:26,019 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_72-funloop_hard_racing.i[41323,41336] [2023-01-27 19:19:26,031 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-27 19:19:26,103 INFO L208 MainTranslator]: Completed translation [2023-01-27 19:19:26,104 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:19:26 WrapperNode [2023-01-27 19:19:26,104 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-01-27 19:19:26,105 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-01-27 19:19:26,105 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-01-27 19:19:26,105 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-01-27 19:19:26,111 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:19:26" (1/1) ... [2023-01-27 19:19:26,141 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:19:26" (1/1) ... [2023-01-27 19:19:26,178 INFO L138 Inliner]: procedures = 271, calls = 41, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 250 [2023-01-27 19:19:26,179 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-01-27 19:19:26,180 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-01-27 19:19:26,180 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-01-27 19:19:26,180 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-01-27 19:19:26,187 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:19:26" (1/1) ... [2023-01-27 19:19:26,188 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:19:26" (1/1) ... [2023-01-27 19:19:26,200 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:19:26" (1/1) ... [2023-01-27 19:19:26,200 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:19:26" (1/1) ... [2023-01-27 19:19:26,212 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:19:26" (1/1) ... [2023-01-27 19:19:26,218 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:19:26" (1/1) ... [2023-01-27 19:19:26,219 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:19:26" (1/1) ... [2023-01-27 19:19:26,221 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:19:26" (1/1) ... [2023-01-27 19:19:26,223 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-01-27 19:19:26,224 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-01-27 19:19:26,224 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-01-27 19:19:26,224 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-01-27 19:19:26,225 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:19:26" (1/1) ... [2023-01-27 19:19:26,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-27 19:19:26,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 19:19:26,256 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-01-27 19:19:26,261 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-01-27 19:19:26,285 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-01-27 19:19:26,285 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-01-27 19:19:26,285 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-01-27 19:19:26,286 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-01-27 19:19:26,286 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-01-27 19:19:26,286 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-01-27 19:19:26,286 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-01-27 19:19:26,286 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-01-27 19:19:26,286 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-01-27 19:19:26,287 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-01-27 19:19:26,287 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-01-27 19:19:26,289 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-01-27 19:19:26,426 INFO L236 CfgBuilder]: Building ICFG [2023-01-27 19:19:26,428 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-01-27 19:19:26,713 INFO L277 CfgBuilder]: Performing block encoding [2023-01-27 19:19:26,722 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-01-27 19:19:26,722 INFO L302 CfgBuilder]: Removed 35 assume(true) statements. [2023-01-27 19:19:26,724 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 07:19:26 BoogieIcfgContainer [2023-01-27 19:19:26,724 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-01-27 19:19:26,726 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-01-27 19:19:26,726 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-01-27 19:19:26,728 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-01-27 19:19:26,728 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.01 07:19:25" (1/3) ... [2023-01-27 19:19:26,729 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5fb034dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 07:19:26, skipping insertion in model container [2023-01-27 19:19:26,729 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:19:26" (2/3) ... [2023-01-27 19:19:26,729 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5fb034dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 07:19:26, skipping insertion in model container [2023-01-27 19:19:26,729 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 07:19:26" (3/3) ... [2023-01-27 19:19:26,731 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_72-funloop_hard_racing.i [2023-01-27 19:19:26,744 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-01-27 19:19:26,745 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2023-01-27 19:19:26,745 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-01-27 19:19:26,826 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-01-27 19:19:26,857 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 204 places, 246 transitions, 500 flow [2023-01-27 19:19:26,945 INFO L130 PetriNetUnfolder]: 73/381 cut-off events. [2023-01-27 19:19:26,945 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-01-27 19:19:26,953 INFO L83 FinitePrefix]: Finished finitePrefix Result has 387 conditions, 381 events. 73/381 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 1706 event pairs, 0 based on Foata normal form. 0/300 useless extension candidates. Maximal degree in co-relation 209. Up to 8 conditions per place. [2023-01-27 19:19:26,953 INFO L82 GeneralOperation]: Start removeDead. Operand has 204 places, 246 transitions, 500 flow [2023-01-27 19:19:26,960 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 200 places, 241 transitions, 487 flow [2023-01-27 19:19:26,964 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-27 19:19:26,972 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 200 places, 241 transitions, 487 flow [2023-01-27 19:19:26,975 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 200 places, 241 transitions, 487 flow [2023-01-27 19:19:26,975 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 200 places, 241 transitions, 487 flow [2023-01-27 19:19:27,029 INFO L130 PetriNetUnfolder]: 72/376 cut-off events. [2023-01-27 19:19:27,029 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-27 19:19:27,032 INFO L83 FinitePrefix]: Finished finitePrefix Result has 381 conditions, 376 events. 72/376 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 1659 event pairs, 0 based on Foata normal form. 0/295 useless extension candidates. Maximal degree in co-relation 209. Up to 8 conditions per place. [2023-01-27 19:19:27,042 INFO L119 LiptonReduction]: Number of co-enabled transitions 19458 [2023-01-27 19:19:29,539 INFO L134 LiptonReduction]: Checked pairs total: 28650 [2023-01-27 19:19:29,539 INFO L136 LiptonReduction]: Total number of compositions: 184 [2023-01-27 19:19:29,553 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-27 19:19:29,558 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;@2f21b194, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-27 19:19:29,558 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-01-27 19:19:29,563 INFO L130 PetriNetUnfolder]: 9/39 cut-off events. [2023-01-27 19:19:29,563 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-27 19:19:29,563 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:19:29,564 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-01-27 19:19:29,564 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-01-27 19:19:29,569 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:19:29,569 INFO L85 PathProgramCache]: Analyzing trace with hash -454048497, now seen corresponding path program 1 times [2023-01-27 19:19:29,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:19:29,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413353424] [2023-01-27 19:19:29,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:19:29,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:19:29,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:19:29,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:19:29,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:19:29,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413353424] [2023-01-27 19:19:29,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413353424] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 19:19:29,812 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 19:19:29,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-27 19:19:29,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98425233] [2023-01-27 19:19:29,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 19:19:29,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 19:19:29,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:19:29,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 19:19:29,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 19:19:29,844 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 196 out of 430 [2023-01-27 19:19:29,847 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 96 transitions, 197 flow. Second operand has 3 states, 3 states have (on average 198.0) internal successors, (594), 3 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:19:29,847 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:19:29,848 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 196 of 430 [2023-01-27 19:19:29,848 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:19:30,078 INFO L130 PetriNetUnfolder]: 579/1212 cut-off events. [2023-01-27 19:19:30,079 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-27 19:19:30,081 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2278 conditions, 1212 events. 579/1212 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 6864 event pairs, 465 based on Foata normal form. 213/1209 useless extension candidates. Maximal degree in co-relation 2191. Up to 1060 conditions per place. [2023-01-27 19:19:30,087 INFO L137 encePairwiseOnDemand]: 396/430 looper letters, 51 selfloop transitions, 2 changer transitions 0/66 dead transitions. [2023-01-27 19:19:30,087 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 66 transitions, 243 flow [2023-01-27 19:19:30,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 19:19:30,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 19:19:30,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 673 transitions. [2023-01-27 19:19:30,100 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5217054263565891 [2023-01-27 19:19:30,101 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 673 transitions. [2023-01-27 19:19:30,101 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 673 transitions. [2023-01-27 19:19:30,103 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:19:30,105 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 673 transitions. [2023-01-27 19:19:30,109 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 224.33333333333334) internal successors, (673), 3 states have internal predecessors, (673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:19:30,114 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 430.0) internal successors, (1720), 4 states have internal predecessors, (1720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:19:30,115 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 430.0) internal successors, (1720), 4 states have internal predecessors, (1720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:19:30,116 INFO L175 Difference]: Start difference. First operand has 63 places, 96 transitions, 197 flow. Second operand 3 states and 673 transitions. [2023-01-27 19:19:30,117 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 66 transitions, 243 flow [2023-01-27 19:19:30,119 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 66 transitions, 243 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-01-27 19:19:30,121 INFO L231 Difference]: Finished difference. Result has 65 places, 66 transitions, 147 flow [2023-01-27 19:19:30,122 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=430, PETRI_DIFFERENCE_MINUEND_FLOW=135, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=147, PETRI_PLACES=65, PETRI_TRANSITIONS=66} [2023-01-27 19:19:30,125 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 2 predicate places. [2023-01-27 19:19:30,125 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 66 transitions, 147 flow [2023-01-27 19:19:30,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 198.0) internal successors, (594), 3 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:19:30,126 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:19:30,126 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-01-27 19:19:30,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-01-27 19:19:30,126 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-01-27 19:19:30,127 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:19:30,127 INFO L85 PathProgramCache]: Analyzing trace with hash 584833530, now seen corresponding path program 1 times [2023-01-27 19:19:30,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:19:30,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747860787] [2023-01-27 19:19:30,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:19:30,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:19:30,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:19:30,198 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 19:19:30,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:19:30,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747860787] [2023-01-27 19:19:30,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747860787] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 19:19:30,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165647692] [2023-01-27 19:19:30,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:19:30,199 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:19:30,199 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 19:19:30,205 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 19:19:30,214 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-01-27 19:19:30,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:19:30,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 3 conjunts are in the unsatisfiable core [2023-01-27 19:19:30,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 19:19:30,390 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 19:19:30,390 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 19:19:30,404 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 19:19:30,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1165647692] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 19:19:30,405 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 19:19:30,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-01-27 19:19:30,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94344429] [2023-01-27 19:19:30,406 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 19:19:30,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-01-27 19:19:30,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:19:30,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-01-27 19:19:30,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-01-27 19:19:30,409 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 196 out of 430 [2023-01-27 19:19:30,411 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 66 transitions, 147 flow. Second operand has 7 states, 7 states have (on average 197.57142857142858) internal successors, (1383), 7 states have internal predecessors, (1383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:19:30,411 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:19:30,411 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 196 of 430 [2023-01-27 19:19:30,411 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:19:30,654 INFO L130 PetriNetUnfolder]: 579/1215 cut-off events. [2023-01-27 19:19:30,654 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-27 19:19:30,656 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2294 conditions, 1215 events. 579/1215 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 6863 event pairs, 465 based on Foata normal form. 0/999 useless extension candidates. Maximal degree in co-relation 2282. Up to 1060 conditions per place. [2023-01-27 19:19:30,660 INFO L137 encePairwiseOnDemand]: 427/430 looper letters, 51 selfloop transitions, 5 changer transitions 0/69 dead transitions. [2023-01-27 19:19:30,660 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 69 transitions, 271 flow [2023-01-27 19:19:30,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-27 19:19:30,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-27 19:19:30,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1235 transitions. [2023-01-27 19:19:30,664 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4786821705426357 [2023-01-27 19:19:30,664 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1235 transitions. [2023-01-27 19:19:30,664 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1235 transitions. [2023-01-27 19:19:30,665 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:19:30,665 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1235 transitions. [2023-01-27 19:19:30,667 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 205.83333333333334) internal successors, (1235), 6 states have internal predecessors, (1235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:19:30,672 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 430.0) internal successors, (3010), 7 states have internal predecessors, (3010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:19:30,673 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 430.0) internal successors, (3010), 7 states have internal predecessors, (3010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:19:30,674 INFO L175 Difference]: Start difference. First operand has 65 places, 66 transitions, 147 flow. Second operand 6 states and 1235 transitions. [2023-01-27 19:19:30,674 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 69 transitions, 271 flow [2023-01-27 19:19:30,675 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 69 transitions, 267 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-01-27 19:19:30,676 INFO L231 Difference]: Finished difference. Result has 72 places, 69 transitions, 179 flow [2023-01-27 19:19:30,676 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=430, PETRI_DIFFERENCE_MINUEND_FLOW=143, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=179, PETRI_PLACES=72, PETRI_TRANSITIONS=69} [2023-01-27 19:19:30,677 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 9 predicate places. [2023-01-27 19:19:30,677 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 69 transitions, 179 flow [2023-01-27 19:19:30,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 197.57142857142858) internal successors, (1383), 7 states have internal predecessors, (1383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:19:30,678 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:19:30,679 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1] [2023-01-27 19:19:30,691 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-01-27 19:19:30,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:19:30,892 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-01-27 19:19:30,892 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:19:30,892 INFO L85 PathProgramCache]: Analyzing trace with hash -451628733, now seen corresponding path program 2 times [2023-01-27 19:19:30,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:19:30,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375160805] [2023-01-27 19:19:30,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:19:30,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:19:30,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:19:31,029 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 19:19:31,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:19:31,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375160805] [2023-01-27 19:19:31,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375160805] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 19:19:31,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761005765] [2023-01-27 19:19:31,030 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 19:19:31,030 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:19:31,030 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 19:19:31,033 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 19:19:31,036 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-01-27 19:19:31,114 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 19:19:31,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 19:19:31,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-27 19:19:31,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 19:19:31,134 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 19:19:31,134 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 19:19:31,182 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 19:19:31,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1761005765] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 19:19:31,183 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 19:19:31,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-01-27 19:19:31,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527178492] [2023-01-27 19:19:31,183 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 19:19:31,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-01-27 19:19:31,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:19:31,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-01-27 19:19:31,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-01-27 19:19:31,189 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 196 out of 430 [2023-01-27 19:19:31,193 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 69 transitions, 179 flow. Second operand has 13 states, 13 states have (on average 197.30769230769232) internal successors, (2565), 13 states have internal predecessors, (2565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:19:31,193 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:19:31,193 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 196 of 430 [2023-01-27 19:19:31,193 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:19:31,397 INFO L130 PetriNetUnfolder]: 579/1221 cut-off events. [2023-01-27 19:19:31,398 INFO L131 PetriNetUnfolder]: For 20/20 co-relation queries the response was YES. [2023-01-27 19:19:31,399 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2331 conditions, 1221 events. 579/1221 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 6856 event pairs, 465 based on Foata normal form. 6/1012 useless extension candidates. Maximal degree in co-relation 2273. Up to 1060 conditions per place. [2023-01-27 19:19:31,403 INFO L137 encePairwiseOnDemand]: 427/430 looper letters, 51 selfloop transitions, 11 changer transitions 0/75 dead transitions. [2023-01-27 19:19:31,404 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 75 transitions, 339 flow [2023-01-27 19:19:31,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-01-27 19:19:31,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-01-27 19:19:31,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2420 transitions. [2023-01-27 19:19:31,409 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4689922480620155 [2023-01-27 19:19:31,409 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2420 transitions. [2023-01-27 19:19:31,410 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2420 transitions. [2023-01-27 19:19:31,411 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:19:31,411 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2420 transitions. [2023-01-27 19:19:31,416 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 201.66666666666666) internal successors, (2420), 12 states have internal predecessors, (2420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:19:31,424 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 430.0) internal successors, (5590), 13 states have internal predecessors, (5590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:19:31,426 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 430.0) internal successors, (5590), 13 states have internal predecessors, (5590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:19:31,426 INFO L175 Difference]: Start difference. First operand has 72 places, 69 transitions, 179 flow. Second operand 12 states and 2420 transitions. [2023-01-27 19:19:31,426 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 75 transitions, 339 flow [2023-01-27 19:19:31,428 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 75 transitions, 325 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-01-27 19:19:31,429 INFO L231 Difference]: Finished difference. Result has 88 places, 75 transitions, 249 flow [2023-01-27 19:19:31,430 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=430, PETRI_DIFFERENCE_MINUEND_FLOW=165, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=249, PETRI_PLACES=88, PETRI_TRANSITIONS=75} [2023-01-27 19:19:31,430 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 25 predicate places. [2023-01-27 19:19:31,431 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 75 transitions, 249 flow [2023-01-27 19:19:31,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 197.30769230769232) internal successors, (2565), 13 states have internal predecessors, (2565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:19:31,432 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:19:31,432 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1] [2023-01-27 19:19:31,441 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 19:19:31,640 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,SelfDestructingSolverStorable2 [2023-01-27 19:19:31,640 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-01-27 19:19:31,641 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:19:31,641 INFO L85 PathProgramCache]: Analyzing trace with hash 1666983395, now seen corresponding path program 3 times [2023-01-27 19:19:31,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:19:31,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650786491] [2023-01-27 19:19:31,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:19:31,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:19:31,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 19:19:31,672 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-27 19:19:31,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 19:19:31,708 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-27 19:19:31,708 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-27 19:19:31,709 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2023-01-27 19:19:31,712 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2023-01-27 19:19:31,715 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2023-01-27 19:19:31,719 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2023-01-27 19:19:31,719 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2023-01-27 19:19:31,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-01-27 19:19:31,719 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1] [2023-01-27 19:19:31,721 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-27 19:19:31,721 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-01-27 19:19:31,766 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-01-27 19:19:31,770 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 262 places, 317 transitions, 652 flow [2023-01-27 19:19:31,822 INFO L130 PetriNetUnfolder]: 118/611 cut-off events. [2023-01-27 19:19:31,823 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-01-27 19:19:31,828 INFO L83 FinitePrefix]: Finished finitePrefix Result has 625 conditions, 611 events. 118/611 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 3087 event pairs, 0 based on Foata normal form. 0/481 useless extension candidates. Maximal degree in co-relation 383. Up to 12 conditions per place. [2023-01-27 19:19:31,828 INFO L82 GeneralOperation]: Start removeDead. Operand has 262 places, 317 transitions, 652 flow [2023-01-27 19:19:31,833 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 262 places, 317 transitions, 652 flow [2023-01-27 19:19:31,833 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-27 19:19:31,833 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 262 places, 317 transitions, 652 flow [2023-01-27 19:19:31,833 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 262 places, 317 transitions, 652 flow [2023-01-27 19:19:31,834 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 262 places, 317 transitions, 652 flow [2023-01-27 19:19:31,886 INFO L130 PetriNetUnfolder]: 118/611 cut-off events. [2023-01-27 19:19:31,887 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-01-27 19:19:31,892 INFO L83 FinitePrefix]: Finished finitePrefix Result has 625 conditions, 611 events. 118/611 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 3087 event pairs, 0 based on Foata normal form. 0/481 useless extension candidates. Maximal degree in co-relation 383. Up to 12 conditions per place. [2023-01-27 19:19:31,917 INFO L119 LiptonReduction]: Number of co-enabled transitions 49956 [2023-01-27 19:19:34,785 INFO L134 LiptonReduction]: Checked pairs total: 86365 [2023-01-27 19:19:34,786 INFO L136 LiptonReduction]: Total number of compositions: 242 [2023-01-27 19:19:34,792 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-27 19:19:34,794 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;@2f21b194, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-27 19:19:34,794 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-01-27 19:19:34,798 INFO L130 PetriNetUnfolder]: 9/40 cut-off events. [2023-01-27 19:19:34,798 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-01-27 19:19:34,798 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:19:34,798 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-01-27 19:19:34,799 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2023-01-27 19:19:34,799 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:19:34,799 INFO L85 PathProgramCache]: Analyzing trace with hash 1440537533, now seen corresponding path program 1 times [2023-01-27 19:19:34,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:19:34,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54683758] [2023-01-27 19:19:34,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:19:34,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:19:34,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:19:34,834 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:19:34,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:19:34,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54683758] [2023-01-27 19:19:34,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54683758] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 19:19:34,835 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 19:19:34,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-27 19:19:34,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851595467] [2023-01-27 19:19:34,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 19:19:34,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 19:19:34,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:19:34,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 19:19:34,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 19:19:34,838 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 252 out of 559 [2023-01-27 19:19:34,838 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 132 transitions, 282 flow. Second operand has 3 states, 3 states have (on average 254.0) internal successors, (762), 3 states have internal predecessors, (762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:19:34,839 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:19:34,839 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 252 of 559 [2023-01-27 19:19:34,839 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:19:37,056 INFO L130 PetriNetUnfolder]: 19961/30642 cut-off events. [2023-01-27 19:19:37,056 INFO L131 PetriNetUnfolder]: For 124/124 co-relation queries the response was YES. [2023-01-27 19:19:37,096 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58969 conditions, 30642 events. 19961/30642 cut-off events. For 124/124 co-relation queries the response was YES. Maximal size of possible extension queue 947. Compared 212680 event pairs, 17166 based on Foata normal form. 5462/30473 useless extension candidates. Maximal degree in co-relation 20159. Up to 28224 conditions per place. [2023-01-27 19:19:37,231 INFO L137 encePairwiseOnDemand]: 516/559 looper letters, 73 selfloop transitions, 2 changer transitions 0/93 dead transitions. [2023-01-27 19:19:37,231 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 93 transitions, 354 flow [2023-01-27 19:19:37,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 19:19:37,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 19:19:37,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 872 transitions. [2023-01-27 19:19:37,234 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5199761478831246 [2023-01-27 19:19:37,234 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 872 transitions. [2023-01-27 19:19:37,234 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 872 transitions. [2023-01-27 19:19:37,234 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:19:37,235 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 872 transitions. [2023-01-27 19:19:37,236 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 290.6666666666667) internal successors, (872), 3 states have internal predecessors, (872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:19:37,239 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 559.0) internal successors, (2236), 4 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 19:19:37,240 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 559.0) internal successors, (2236), 4 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 19:19:37,240 INFO L175 Difference]: Start difference. First operand has 87 places, 132 transitions, 282 flow. Second operand 3 states and 872 transitions. [2023-01-27 19:19:37,240 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 93 transitions, 354 flow [2023-01-27 19:19:37,243 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 93 transitions, 354 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-01-27 19:19:37,245 INFO L231 Difference]: Finished difference. Result has 90 places, 93 transitions, 214 flow [2023-01-27 19:19:37,245 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=559, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=214, PETRI_PLACES=90, PETRI_TRANSITIONS=93} [2023-01-27 19:19:37,247 INFO L281 CegarLoopForPetriNet]: 87 programPoint places, 3 predicate places. [2023-01-27 19:19:37,247 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 93 transitions, 214 flow [2023-01-27 19:19:37,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 254.0) internal successors, (762), 3 states have internal predecessors, (762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:19:37,248 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:19:37,248 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 19:19:37,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-01-27 19:19:37,251 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2023-01-27 19:19:37,251 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:19:37,252 INFO L85 PathProgramCache]: Analyzing trace with hash 38811947, now seen corresponding path program 1 times [2023-01-27 19:19:37,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:19:37,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965541148] [2023-01-27 19:19:37,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:19:37,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:19:37,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:19:37,301 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:19:37,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:19:37,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965541148] [2023-01-27 19:19:37,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965541148] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 19:19:37,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412167924] [2023-01-27 19:19:37,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:19:37,306 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:19:37,306 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 19:19:37,309 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 19:19:37,336 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-01-27 19:19:37,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:19:37,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 2 conjunts are in the unsatisfiable core [2023-01-27 19:19:37,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 19:19:37,395 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 19:19:37,395 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-01-27 19:19:37,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [412167924] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 19:19:37,395 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-01-27 19:19:37,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-01-27 19:19:37,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074903455] [2023-01-27 19:19:37,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 19:19:37,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 19:19:37,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:19:37,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 19:19:37,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-01-27 19:19:37,398 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 252 out of 559 [2023-01-27 19:19:37,399 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 93 transitions, 214 flow. Second operand has 3 states, 3 states have (on average 254.66666666666666) internal successors, (764), 3 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:19:37,399 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:19:37,399 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 252 of 559 [2023-01-27 19:19:37,399 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:19:39,279 INFO L130 PetriNetUnfolder]: 19644/30266 cut-off events. [2023-01-27 19:19:39,279 INFO L131 PetriNetUnfolder]: For 77/77 co-relation queries the response was YES. [2023-01-27 19:19:39,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58589 conditions, 30266 events. 19644/30266 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 955. Compared 213381 event pairs, 8256 based on Foata normal form. 0/24593 useless extension candidates. Maximal degree in co-relation 58576. Up to 28177 conditions per place. [2023-01-27 19:19:39,440 INFO L137 encePairwiseOnDemand]: 556/559 looper letters, 91 selfloop transitions, 2 changer transitions 0/111 dead transitions. [2023-01-27 19:19:39,441 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 111 transitions, 436 flow [2023-01-27 19:19:39,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 19:19:39,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 19:19:39,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 849 transitions. [2023-01-27 19:19:39,450 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5062611806797853 [2023-01-27 19:19:39,450 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 849 transitions. [2023-01-27 19:19:39,450 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 849 transitions. [2023-01-27 19:19:39,451 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:19:39,451 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 849 transitions. [2023-01-27 19:19:39,452 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 283.0) internal successors, (849), 3 states have internal predecessors, (849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:19:39,455 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 559.0) internal successors, (2236), 4 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 19:19:39,455 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 559.0) internal successors, (2236), 4 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 19:19:39,455 INFO L175 Difference]: Start difference. First operand has 90 places, 93 transitions, 214 flow. Second operand 3 states and 849 transitions. [2023-01-27 19:19:39,455 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 111 transitions, 436 flow [2023-01-27 19:19:39,458 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 111 transitions, 432 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-01-27 19:19:39,462 INFO L231 Difference]: Finished difference. Result has 92 places, 94 transitions, 222 flow [2023-01-27 19:19:39,462 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=559, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=222, PETRI_PLACES=92, PETRI_TRANSITIONS=94} [2023-01-27 19:19:39,464 INFO L281 CegarLoopForPetriNet]: 87 programPoint places, 5 predicate places. [2023-01-27 19:19:39,464 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 94 transitions, 222 flow [2023-01-27 19:19:39,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 254.66666666666666) internal successors, (764), 3 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:19:39,465 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:19:39,465 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 19:19:39,475 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-01-27 19:19:39,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:19:39,676 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2023-01-27 19:19:39,676 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:19:39,676 INFO L85 PathProgramCache]: Analyzing trace with hash 762694548, now seen corresponding path program 1 times [2023-01-27 19:19:39,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:19:39,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038423538] [2023-01-27 19:19:39,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:19:39,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:19:39,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:19:39,720 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:19:39,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:19:39,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038423538] [2023-01-27 19:19:39,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038423538] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 19:19:39,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256228352] [2023-01-27 19:19:39,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:19:39,721 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:19:39,722 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 19:19:39,723 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 19:19:39,752 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 19:19:39,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:19:39,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 3 conjunts are in the unsatisfiable core [2023-01-27 19:19:39,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 19:19:39,815 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:19:39,815 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 19:19:39,831 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:19:39,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1256228352] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 19:19:39,831 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 19:19:39,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-01-27 19:19:39,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937497683] [2023-01-27 19:19:39,831 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 19:19:39,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-01-27 19:19:39,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:19:39,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-01-27 19:19:39,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-01-27 19:19:39,834 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 252 out of 559 [2023-01-27 19:19:39,835 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 94 transitions, 222 flow. Second operand has 7 states, 7 states have (on average 254.14285714285714) internal successors, (1779), 7 states have internal predecessors, (1779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:19:39,836 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:19:39,836 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 252 of 559 [2023-01-27 19:19:39,836 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:19:41,541 INFO L130 PetriNetUnfolder]: 20049/30556 cut-off events. [2023-01-27 19:19:41,541 INFO L131 PetriNetUnfolder]: For 676/676 co-relation queries the response was YES. [2023-01-27 19:19:41,571 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59459 conditions, 30556 events. 20049/30556 cut-off events. For 676/676 co-relation queries the response was YES. Maximal size of possible extension queue 960. Compared 209770 event pairs, 17166 based on Foata normal form. 3/25146 useless extension candidates. Maximal degree in co-relation 59431. Up to 28195 conditions per place. [2023-01-27 19:19:41,687 INFO L137 encePairwiseOnDemand]: 556/559 looper letters, 74 selfloop transitions, 5 changer transitions 0/97 dead transitions. [2023-01-27 19:19:41,687 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 97 transitions, 392 flow [2023-01-27 19:19:41,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-27 19:19:41,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-27 19:19:41,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1593 transitions. [2023-01-27 19:19:41,692 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4749552772808587 [2023-01-27 19:19:41,692 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1593 transitions. [2023-01-27 19:19:41,692 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1593 transitions. [2023-01-27 19:19:41,693 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:19:41,693 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1593 transitions. [2023-01-27 19:19:41,696 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 265.5) internal successors, (1593), 6 states have internal predecessors, (1593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:19:41,701 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 559.0) internal successors, (3913), 7 states have internal predecessors, (3913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:19:41,702 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 559.0) internal successors, (3913), 7 states have internal predecessors, (3913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:19:41,702 INFO L175 Difference]: Start difference. First operand has 92 places, 94 transitions, 222 flow. Second operand 6 states and 1593 transitions. [2023-01-27 19:19:41,702 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 97 transitions, 392 flow [2023-01-27 19:19:41,703 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 97 transitions, 390 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-01-27 19:19:41,705 INFO L231 Difference]: Finished difference. Result has 99 places, 97 transitions, 256 flow [2023-01-27 19:19:41,705 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=559, PETRI_DIFFERENCE_MINUEND_FLOW=220, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=256, PETRI_PLACES=99, PETRI_TRANSITIONS=97} [2023-01-27 19:19:41,705 INFO L281 CegarLoopForPetriNet]: 87 programPoint places, 12 predicate places. [2023-01-27 19:19:41,706 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 97 transitions, 256 flow [2023-01-27 19:19:41,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 254.14285714285714) internal successors, (1779), 7 states have internal predecessors, (1779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:19:41,706 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:19:41,707 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 19:19:41,717 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 19:19:41,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:19:41,912 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2023-01-27 19:19:41,912 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:19:41,912 INFO L85 PathProgramCache]: Analyzing trace with hash 73730964, now seen corresponding path program 2 times [2023-01-27 19:19:41,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:19:41,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946938420] [2023-01-27 19:19:41,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:19:41,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:19:41,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:19:42,012 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 19:19:42,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:19:42,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946938420] [2023-01-27 19:19:42,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946938420] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 19:19:42,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862412455] [2023-01-27 19:19:42,013 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 19:19:42,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:19:42,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 19:19:42,014 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 19:19:42,042 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 19:19:42,099 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-01-27 19:19:42,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 19:19:42,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 21 conjunts are in the unsatisfiable core [2023-01-27 19:19:42,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 19:19:42,136 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2023-01-27 19:19:42,198 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-01-27 19:19:42,199 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-01-27 19:19:42,230 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2023-01-27 19:19:42,271 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-01-27 19:19:42,271 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-01-27 19:19:42,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1862412455] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 19:19:42,272 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-01-27 19:19:42,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 10 [2023-01-27 19:19:42,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167429136] [2023-01-27 19:19:42,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 19:19:42,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-01-27 19:19:42,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:19:42,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-01-27 19:19:42,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2023-01-27 19:19:42,275 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 209 out of 559 [2023-01-27 19:19:42,276 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 97 transitions, 256 flow. Second operand has 6 states, 6 states have (on average 210.66666666666666) internal successors, (1264), 6 states have internal predecessors, (1264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:19:42,276 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:19:42,276 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 209 of 559 [2023-01-27 19:19:42,276 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:19:44,997 INFO L130 PetriNetUnfolder]: 27970/43695 cut-off events. [2023-01-27 19:19:44,997 INFO L131 PetriNetUnfolder]: For 1064/1064 co-relation queries the response was YES. [2023-01-27 19:19:45,077 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85464 conditions, 43695 events. 27970/43695 cut-off events. For 1064/1064 co-relation queries the response was YES. Maximal size of possible extension queue 1241. Compared 327785 event pairs, 4340 based on Foata normal form. 0/36129 useless extension candidates. Maximal degree in co-relation 85428. Up to 30419 conditions per place. [2023-01-27 19:19:45,205 INFO L137 encePairwiseOnDemand]: 549/559 looper letters, 201 selfloop transitions, 16 changer transitions 0/233 dead transitions. [2023-01-27 19:19:45,205 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 233 transitions, 996 flow [2023-01-27 19:19:45,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-27 19:19:45,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-27 19:19:45,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1468 transitions. [2023-01-27 19:19:45,215 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43768634466308887 [2023-01-27 19:19:45,216 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1468 transitions. [2023-01-27 19:19:45,216 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1468 transitions. [2023-01-27 19:19:45,218 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:19:45,218 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1468 transitions. [2023-01-27 19:19:45,222 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 244.66666666666666) internal successors, (1468), 6 states have internal predecessors, (1468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:19:45,228 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 559.0) internal successors, (3913), 7 states have internal predecessors, (3913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:19:45,229 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 559.0) internal successors, (3913), 7 states have internal predecessors, (3913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:19:45,229 INFO L175 Difference]: Start difference. First operand has 99 places, 97 transitions, 256 flow. Second operand 6 states and 1468 transitions. [2023-01-27 19:19:45,229 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 233 transitions, 996 flow [2023-01-27 19:19:45,233 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 233 transitions, 982 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-01-27 19:19:45,235 INFO L231 Difference]: Finished difference. Result has 107 places, 111 transitions, 345 flow [2023-01-27 19:19:45,235 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=559, PETRI_DIFFERENCE_MINUEND_FLOW=242, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=345, PETRI_PLACES=107, PETRI_TRANSITIONS=111} [2023-01-27 19:19:45,236 INFO L281 CegarLoopForPetriNet]: 87 programPoint places, 20 predicate places. [2023-01-27 19:19:45,236 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 111 transitions, 345 flow [2023-01-27 19:19:45,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 210.66666666666666) internal successors, (1264), 6 states have internal predecessors, (1264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:19:45,237 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:19:45,237 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 19:19:45,245 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 19:19:45,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:19:45,446 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2023-01-27 19:19:45,448 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:19:45,448 INFO L85 PathProgramCache]: Analyzing trace with hash 1832831312, now seen corresponding path program 1 times [2023-01-27 19:19:45,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:19:45,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608760393] [2023-01-27 19:19:45,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:19:45,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:19:45,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:19:45,521 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-01-27 19:19:45,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:19:45,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608760393] [2023-01-27 19:19:45,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608760393] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 19:19:45,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231844000] [2023-01-27 19:19:45,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:19:45,522 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:19:45,522 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 19:19:45,524 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 19:19:45,529 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 19:19:45,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:19:45,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-27 19:19:45,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 19:19:45,641 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 19:19:45,641 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 19:19:45,695 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 19:19:45,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [231844000] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 19:19:45,695 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 19:19:45,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 6] total 14 [2023-01-27 19:19:45,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973522094] [2023-01-27 19:19:45,695 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 19:19:45,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-01-27 19:19:45,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:19:45,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-01-27 19:19:45,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2023-01-27 19:19:45,699 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 246 out of 559 [2023-01-27 19:19:45,702 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 111 transitions, 345 flow. Second operand has 14 states, 14 states have (on average 247.92857142857142) internal successors, (3471), 14 states have internal predecessors, (3471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:19:45,702 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:19:45,702 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 246 of 559 [2023-01-27 19:19:45,702 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:19:48,332 INFO L130 PetriNetUnfolder]: 25483/40304 cut-off events. [2023-01-27 19:19:48,333 INFO L131 PetriNetUnfolder]: For 8365/8367 co-relation queries the response was YES. [2023-01-27 19:19:48,427 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86542 conditions, 40304 events. 25483/40304 cut-off events. For 8365/8367 co-relation queries the response was YES. Maximal size of possible extension queue 1189. Compared 308071 event pairs, 621 based on Foata normal form. 32/35590 useless extension candidates. Maximal degree in co-relation 86483. Up to 36042 conditions per place. [2023-01-27 19:19:48,716 INFO L137 encePairwiseOnDemand]: 554/559 looper letters, 142 selfloop transitions, 14 changer transitions 0/174 dead transitions. [2023-01-27 19:19:48,717 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 174 transitions, 849 flow [2023-01-27 19:19:48,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-01-27 19:19:48,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-01-27 19:19:48,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 3587 transitions. [2023-01-27 19:19:48,725 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45834398159979556 [2023-01-27 19:19:48,725 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 3587 transitions. [2023-01-27 19:19:48,725 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 3587 transitions. [2023-01-27 19:19:48,727 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:19:48,728 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 3587 transitions. [2023-01-27 19:19:48,734 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 256.2142857142857) internal successors, (3587), 14 states have internal predecessors, (3587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:19:48,744 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 559.0) internal successors, (8385), 15 states have internal predecessors, (8385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:19:48,746 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 559.0) internal successors, (8385), 15 states have internal predecessors, (8385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:19:48,746 INFO L175 Difference]: Start difference. First operand has 107 places, 111 transitions, 345 flow. Second operand 14 states and 3587 transitions. [2023-01-27 19:19:48,746 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 174 transitions, 849 flow [2023-01-27 19:19:48,759 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 174 transitions, 849 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-01-27 19:19:48,761 INFO L231 Difference]: Finished difference. Result has 121 places, 117 transitions, 415 flow [2023-01-27 19:19:48,761 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=559, PETRI_DIFFERENCE_MINUEND_FLOW=345, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=415, PETRI_PLACES=121, PETRI_TRANSITIONS=117} [2023-01-27 19:19:48,761 INFO L281 CegarLoopForPetriNet]: 87 programPoint places, 34 predicate places. [2023-01-27 19:19:48,762 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 117 transitions, 415 flow [2023-01-27 19:19:48,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 247.92857142857142) internal successors, (3471), 14 states have internal predecessors, (3471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:19:48,763 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:19:48,763 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 3, 2, 2, 1, 1, 1, 1, 1] [2023-01-27 19:19:48,769 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-01-27 19:19:48,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:19:48,968 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2023-01-27 19:19:48,969 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:19:48,969 INFO L85 PathProgramCache]: Analyzing trace with hash -1872804745, now seen corresponding path program 1 times [2023-01-27 19:19:48,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:19:48,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895860744] [2023-01-27 19:19:48,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:19:48,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:19:48,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 19:19:48,998 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-27 19:19:49,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 19:19:49,024 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-27 19:19:49,026 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-27 19:19:49,026 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2023-01-27 19:19:49,026 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2023-01-27 19:19:49,026 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2023-01-27 19:19:49,027 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2023-01-27 19:19:49,027 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2023-01-27 19:19:49,027 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2023-01-27 19:19:49,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-01-27 19:19:49,027 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1] [2023-01-27 19:19:49,028 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-27 19:19:49,028 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-01-27 19:19:49,066 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-01-27 19:19:49,069 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 320 places, 388 transitions, 806 flow [2023-01-27 19:19:49,173 INFO L130 PetriNetUnfolder]: 168/872 cut-off events. [2023-01-27 19:19:49,173 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-01-27 19:19:49,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 900 conditions, 872 events. 168/872 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 4663 event pairs, 1 based on Foata normal form. 0/689 useless extension candidates. Maximal degree in co-relation 619. Up to 16 conditions per place. [2023-01-27 19:19:49,182 INFO L82 GeneralOperation]: Start removeDead. Operand has 320 places, 388 transitions, 806 flow [2023-01-27 19:19:49,188 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 320 places, 388 transitions, 806 flow [2023-01-27 19:19:49,188 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-27 19:19:49,188 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 320 places, 388 transitions, 806 flow [2023-01-27 19:19:49,188 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 320 places, 388 transitions, 806 flow [2023-01-27 19:19:49,188 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 320 places, 388 transitions, 806 flow [2023-01-27 19:19:49,254 INFO L130 PetriNetUnfolder]: 168/872 cut-off events. [2023-01-27 19:19:49,254 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-01-27 19:19:49,262 INFO L83 FinitePrefix]: Finished finitePrefix Result has 900 conditions, 872 events. 168/872 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 4663 event pairs, 1 based on Foata normal form. 0/689 useless extension candidates. Maximal degree in co-relation 619. Up to 16 conditions per place. [2023-01-27 19:19:49,298 INFO L119 LiptonReduction]: Number of co-enabled transitions 89838 [2023-01-27 19:19:52,560 INFO L134 LiptonReduction]: Checked pairs total: 142134 [2023-01-27 19:19:52,560 INFO L136 LiptonReduction]: Total number of compositions: 294 [2023-01-27 19:19:52,561 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-27 19:19:52,562 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;@2f21b194, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-27 19:19:52,562 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-01-27 19:19:52,564 INFO L130 PetriNetUnfolder]: 12/44 cut-off events. [2023-01-27 19:19:52,564 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-01-27 19:19:52,564 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:19:52,564 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-01-27 19:19:52,564 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-01-27 19:19:52,564 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:19:52,564 INFO L85 PathProgramCache]: Analyzing trace with hash 100448795, now seen corresponding path program 1 times [2023-01-27 19:19:52,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:19:52,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880133075] [2023-01-27 19:19:52,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:19:52,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:19:52,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:19:52,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:19:52,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:19:52,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880133075] [2023-01-27 19:19:52,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880133075] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 19:19:52,588 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 19:19:52,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-27 19:19:52,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185225442] [2023-01-27 19:19:52,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 19:19:52,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 19:19:52,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:19:52,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 19:19:52,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 19:19:52,591 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 308 out of 682 [2023-01-27 19:19:52,592 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 165 transitions, 360 flow. Second operand has 3 states, 3 states have (on average 310.0) internal successors, (930), 3 states have internal predecessors, (930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:19:52,592 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:19:52,592 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 308 of 682 [2023-01-27 19:19:52,592 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:20:31,321 INFO L130 PetriNetUnfolder]: 477490/661421 cut-off events. [2023-01-27 19:20:31,321 INFO L131 PetriNetUnfolder]: For 4158/4158 co-relation queries the response was YES. [2023-01-27 19:20:32,220 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1274279 conditions, 661421 events. 477490/661421 cut-off events. For 4158/4158 co-relation queries the response was YES. Maximal size of possible extension queue 14829. Compared 5287189 event pairs, 422085 based on Foata normal form. 116547/658008 useless extension candidates. Maximal degree in co-relation 143396. Up to 610562 conditions per place. [2023-01-27 19:20:34,577 INFO L137 encePairwiseOnDemand]: 628/682 looper letters, 91 selfloop transitions, 2 changer transitions 0/115 dead transitions. [2023-01-27 19:20:34,577 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 115 transitions, 446 flow [2023-01-27 19:20:34,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 19:20:34,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 19:20:34,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1069 transitions. [2023-01-27 19:20:34,580 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5224828934506354 [2023-01-27 19:20:34,580 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1069 transitions. [2023-01-27 19:20:34,580 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1069 transitions. [2023-01-27 19:20:34,581 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:20:34,581 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1069 transitions. [2023-01-27 19:20:34,583 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 356.3333333333333) internal successors, (1069), 3 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 19:20:34,585 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 682.0) internal successors, (2728), 4 states have internal predecessors, (2728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:20:34,585 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 682.0) internal successors, (2728), 4 states have internal predecessors, (2728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:20:34,586 INFO L175 Difference]: Start difference. First operand has 108 places, 165 transitions, 360 flow. Second operand 3 states and 1069 transitions. [2023-01-27 19:20:34,586 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 115 transitions, 446 flow [2023-01-27 19:20:34,587 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 115 transitions, 446 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-01-27 19:20:34,589 INFO L231 Difference]: Finished difference. Result has 111 places, 115 transitions, 270 flow [2023-01-27 19:20:34,589 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=258, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=270, PETRI_PLACES=111, PETRI_TRANSITIONS=115} [2023-01-27 19:20:34,590 INFO L281 CegarLoopForPetriNet]: 108 programPoint places, 3 predicate places. [2023-01-27 19:20:34,590 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 115 transitions, 270 flow [2023-01-27 19:20:34,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 310.0) internal successors, (930), 3 states have internal predecessors, (930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:20:34,590 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:20:34,590 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 19:20:34,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-01-27 19:20:34,590 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-01-27 19:20:34,591 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:20:34,591 INFO L85 PathProgramCache]: Analyzing trace with hash -673101525, now seen corresponding path program 1 times [2023-01-27 19:20:34,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:20:34,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331181730] [2023-01-27 19:20:34,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:20:34,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:20:34,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:20:34,813 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:20:34,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:20:34,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331181730] [2023-01-27 19:20:34,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331181730] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 19:20:34,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727957653] [2023-01-27 19:20:34,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:20:34,814 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:20:34,814 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 19:20:34,829 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 19:20:34,893 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 19:20:34,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:20:34,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 2 conjunts are in the unsatisfiable core [2023-01-27 19:20:34,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 19:20:34,995 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 19:20:34,995 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-01-27 19:20:34,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [727957653] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 19:20:34,995 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-01-27 19:20:34,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-01-27 19:20:34,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059269588] [2023-01-27 19:20:34,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 19:20:34,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 19:20:34,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:20:34,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 19:20:34,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-01-27 19:20:34,997 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 308 out of 682 [2023-01-27 19:20:34,998 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 115 transitions, 270 flow. Second operand has 3 states, 3 states have (on average 310.3333333333333) internal successors, (931), 3 states have internal predecessors, (931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:20:34,998 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:20:34,998 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 308 of 682 [2023-01-27 19:20:34,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:21:17,424 INFO L130 PetriNetUnfolder]: 485132/667396 cut-off events. [2023-01-27 19:21:17,425 INFO L131 PetriNetUnfolder]: For 3923/3923 co-relation queries the response was YES. [2023-01-27 19:21:18,940 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1280211 conditions, 667396 events. 485132/667396 cut-off events. For 3923/3923 co-relation queries the response was YES. Maximal size of possible extension queue 14984. Compared 5254776 event pairs, 335220 based on Foata normal form. 0/546881 useless extension candidates. Maximal degree in co-relation 1280197. Up to 610515 conditions per place. [2023-01-27 19:21:22,077 INFO L137 encePairwiseOnDemand]: 679/682 looper letters, 109 selfloop transitions, 2 changer transitions 0/133 dead transitions. [2023-01-27 19:21:22,078 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 133 transitions, 528 flow [2023-01-27 19:21:22,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 19:21:22,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 19:21:22,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1035 transitions. [2023-01-27 19:21:22,094 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5058651026392962 [2023-01-27 19:21:22,094 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1035 transitions. [2023-01-27 19:21:22,094 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1035 transitions. [2023-01-27 19:21:22,095 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:21:22,095 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1035 transitions. [2023-01-27 19:21:22,096 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 345.0) internal successors, (1035), 3 states have internal predecessors, (1035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:21:22,099 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 682.0) internal successors, (2728), 4 states have internal predecessors, (2728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:21:22,099 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 682.0) internal successors, (2728), 4 states have internal predecessors, (2728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:21:22,099 INFO L175 Difference]: Start difference. First operand has 111 places, 115 transitions, 270 flow. Second operand 3 states and 1035 transitions. [2023-01-27 19:21:22,099 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 133 transitions, 528 flow [2023-01-27 19:21:22,102 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 133 transitions, 524 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-01-27 19:21:22,104 INFO L231 Difference]: Finished difference. Result has 113 places, 116 transitions, 278 flow [2023-01-27 19:21:22,104 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=266, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=278, PETRI_PLACES=113, PETRI_TRANSITIONS=116} [2023-01-27 19:21:22,104 INFO L281 CegarLoopForPetriNet]: 108 programPoint places, 5 predicate places. [2023-01-27 19:21:22,105 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 116 transitions, 278 flow [2023-01-27 19:21:22,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 310.3333333333333) internal successors, (931), 3 states have internal predecessors, (931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:21:22,105 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:21:22,105 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 19:21:22,131 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 19:21:22,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:21:22,306 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-01-27 19:21:22,306 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:21:22,306 INFO L85 PathProgramCache]: Analyzing trace with hash -751777354, now seen corresponding path program 1 times [2023-01-27 19:21:22,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:21:22,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594172635] [2023-01-27 19:21:22,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:21:22,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:21:22,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:21:22,360 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:21:22,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:21:22,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594172635] [2023-01-27 19:21:22,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594172635] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 19:21:22,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863096657] [2023-01-27 19:21:22,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:21:22,361 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:21:22,361 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 19:21:22,376 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 19:21:22,430 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 19:21:22,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:21:22,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 3 conjunts are in the unsatisfiable core [2023-01-27 19:21:22,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 19:21:22,539 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:21:22,540 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 19:21:22,561 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:21:22,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [863096657] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 19:21:22,562 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 19:21:22,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-01-27 19:21:22,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783773264] [2023-01-27 19:21:22,577 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 19:21:22,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-01-27 19:21:22,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:21:22,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-01-27 19:21:22,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-01-27 19:21:22,579 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 308 out of 682 [2023-01-27 19:21:22,580 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 116 transitions, 278 flow. Second operand has 7 states, 7 states have (on average 310.14285714285717) internal successors, (2171), 7 states have internal predecessors, (2171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:21:22,580 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:21:22,580 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 308 of 682 [2023-01-27 19:21:22,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:22:09,694 INFO L130 PetriNetUnfolder]: 482742/664370 cut-off events. [2023-01-27 19:22:09,694 INFO L131 PetriNetUnfolder]: For 13090/13090 co-relation queries the response was YES. [2023-01-27 19:22:11,397 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1286508 conditions, 664370 events. 482742/664370 cut-off events. For 13090/13090 co-relation queries the response was YES. Maximal size of possible extension queue 14916. Compared 5235914 event pairs, 422085 based on Foata normal form. 3/548188 useless extension candidates. Maximal degree in co-relation 1286479. Up to 610533 conditions per place. [2023-01-27 19:22:14,385 INFO L137 encePairwiseOnDemand]: 679/682 looper letters, 92 selfloop transitions, 5 changer transitions 0/119 dead transitions. [2023-01-27 19:22:14,385 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 119 transitions, 484 flow [2023-01-27 19:22:14,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-27 19:22:14,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-27 19:22:14,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1947 transitions. [2023-01-27 19:22:14,389 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47580645161290325 [2023-01-27 19:22:14,389 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1947 transitions. [2023-01-27 19:22:14,389 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1947 transitions. [2023-01-27 19:22:14,390 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:22:14,390 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1947 transitions. [2023-01-27 19:22:14,393 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 324.5) internal successors, (1947), 6 states have internal predecessors, (1947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:22:14,397 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 682.0) internal successors, (4774), 7 states have internal predecessors, (4774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:22:14,398 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 682.0) internal successors, (4774), 7 states have internal predecessors, (4774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:22:14,398 INFO L175 Difference]: Start difference. First operand has 113 places, 116 transitions, 278 flow. Second operand 6 states and 1947 transitions. [2023-01-27 19:22:14,398 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 119 transitions, 484 flow [2023-01-27 19:22:14,409 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 119 transitions, 482 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-01-27 19:22:14,411 INFO L231 Difference]: Finished difference. Result has 120 places, 119 transitions, 312 flow [2023-01-27 19:22:14,411 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=276, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=312, PETRI_PLACES=120, PETRI_TRANSITIONS=119} [2023-01-27 19:22:14,412 INFO L281 CegarLoopForPetriNet]: 108 programPoint places, 12 predicate places. [2023-01-27 19:22:14,412 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 119 transitions, 312 flow [2023-01-27 19:22:14,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 310.14285714285717) internal successors, (2171), 7 states have internal predecessors, (2171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:22:14,413 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:22:14,413 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 19:22:14,418 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-01-27 19:22:14,618 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,SelfDestructingSolverStorable12 [2023-01-27 19:22:14,618 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-01-27 19:22:14,619 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:22:14,619 INFO L85 PathProgramCache]: Analyzing trace with hash 1151730342, now seen corresponding path program 2 times [2023-01-27 19:22:14,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:22:14,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109424063] [2023-01-27 19:22:14,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:22:14,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:22:14,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:22:14,709 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 19:22:14,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:22:14,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109424063] [2023-01-27 19:22:14,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109424063] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 19:22:14,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566889066] [2023-01-27 19:22:14,710 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 19:22:14,711 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:22:14,711 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 19:22:14,712 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 19:22:14,714 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 19:22:14,816 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-01-27 19:22:14,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 19:22:14,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 21 conjunts are in the unsatisfiable core [2023-01-27 19:22:14,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 19:22:14,825 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2023-01-27 19:22:14,865 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-01-27 19:22:14,866 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-01-27 19:22:14,890 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2023-01-27 19:22:14,927 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-01-27 19:22:14,928 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-01-27 19:22:14,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [566889066] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 19:22:14,928 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-01-27 19:22:14,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 10 [2023-01-27 19:22:14,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251787061] [2023-01-27 19:22:14,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 19:22:14,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-01-27 19:22:14,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:22:14,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-01-27 19:22:14,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2023-01-27 19:22:14,932 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 259 out of 682 [2023-01-27 19:22:14,933 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 119 transitions, 312 flow. Second operand has 6 states, 6 states have (on average 260.6666666666667) internal successors, (1564), 6 states have internal predecessors, (1564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:22:14,933 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:22:14,933 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 259 of 682 [2023-01-27 19:22:14,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:23:23,419 INFO L130 PetriNetUnfolder]: 664365/917788 cut-off events. [2023-01-27 19:23:23,420 INFO L131 PetriNetUnfolder]: For 19247/19247 co-relation queries the response was YES. [2023-01-27 19:23:25,333 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1796566 conditions, 917788 events. 664365/917788 cut-off events. For 19247/19247 co-relation queries the response was YES. Maximal size of possible extension queue 20320. Compared 7564483 event pairs, 109758 based on Foata normal form. 0/760873 useless extension candidates. Maximal degree in co-relation 1796529. Up to 693465 conditions per place. [2023-01-27 19:23:28,905 INFO L137 encePairwiseOnDemand]: 671/682 looper letters, 272 selfloop transitions, 20 changer transitions 0/311 dead transitions. [2023-01-27 19:23:28,905 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 311 transitions, 1334 flow [2023-01-27 19:23:28,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-27 19:23:28,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-27 19:23:28,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1843 transitions. [2023-01-27 19:23:28,917 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45039100684261973 [2023-01-27 19:23:28,917 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1843 transitions. [2023-01-27 19:23:28,917 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1843 transitions. [2023-01-27 19:23:28,918 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:23:28,918 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1843 transitions. [2023-01-27 19:23:28,920 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 307.1666666666667) internal successors, (1843), 6 states have internal predecessors, (1843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:23:28,925 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 682.0) internal successors, (4774), 7 states have internal predecessors, (4774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:23:28,925 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 682.0) internal successors, (4774), 7 states have internal predecessors, (4774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:23:28,925 INFO L175 Difference]: Start difference. First operand has 120 places, 119 transitions, 312 flow. Second operand 6 states and 1843 transitions. [2023-01-27 19:23:28,926 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 311 transitions, 1334 flow [2023-01-27 19:23:28,944 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 311 transitions, 1320 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-01-27 19:23:28,947 INFO L231 Difference]: Finished difference. Result has 128 places, 137 transitions, 423 flow [2023-01-27 19:23:28,947 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=298, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=423, PETRI_PLACES=128, PETRI_TRANSITIONS=137} [2023-01-27 19:23:28,947 INFO L281 CegarLoopForPetriNet]: 108 programPoint places, 20 predicate places. [2023-01-27 19:23:28,947 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 137 transitions, 423 flow [2023-01-27 19:23:28,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 260.6666666666667) internal successors, (1564), 6 states have internal predecessors, (1564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:23:28,948 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:23:28,948 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 19:23:28,957 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-01-27 19:23:29,157 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,SelfDestructingSolverStorable13 [2023-01-27 19:23:29,157 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-01-27 19:23:29,158 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:23:29,158 INFO L85 PathProgramCache]: Analyzing trace with hash 488814818, now seen corresponding path program 1 times [2023-01-27 19:23:29,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:23:29,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933170584] [2023-01-27 19:23:29,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:23:29,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:23:29,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:23:29,203 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-01-27 19:23:29,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:23:29,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933170584] [2023-01-27 19:23:29,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933170584] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 19:23:29,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860157884] [2023-01-27 19:23:29,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:23:29,204 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:23:29,204 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 19:23:29,205 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 19:23:29,208 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 19:23:29,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:23:29,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-27 19:23:29,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 19:23:29,326 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 19:23:29,326 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 19:23:29,373 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 19:23:29,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [860157884] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 19:23:29,373 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 19:23:29,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 6] total 14 [2023-01-27 19:23:29,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764629993] [2023-01-27 19:23:29,374 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 19:23:29,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-01-27 19:23:29,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:23:29,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-01-27 19:23:29,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2023-01-27 19:23:29,377 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 302 out of 682 [2023-01-27 19:23:29,379 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 137 transitions, 423 flow. Second operand has 14 states, 14 states have (on average 303.92857142857144) internal successors, (4255), 14 states have internal predecessors, (4255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:23:29,379 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:23:29,379 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 302 of 682 [2023-01-27 19:23:29,379 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:24:37,581 INFO L130 PetriNetUnfolder]: 591054/815197 cut-off events. [2023-01-27 19:24:37,582 INFO L131 PetriNetUnfolder]: For 149423/149495 co-relation queries the response was YES. [2023-01-27 19:24:39,744 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1728125 conditions, 815197 events. 591054/815197 cut-off events. For 149423/149495 co-relation queries the response was YES. Maximal size of possible extension queue 19064. Compared 6663139 event pairs, 163387 based on Foata normal form. 32/701836 useless extension candidates. Maximal degree in co-relation 1728065. Up to 766668 conditions per place. [2023-01-27 19:24:42,739 INFO L137 encePairwiseOnDemand]: 677/682 looper letters, 165 selfloop transitions, 14 changer transitions 0/201 dead transitions. [2023-01-27 19:24:42,739 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 201 transitions, 977 flow [2023-01-27 19:24:42,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-01-27 19:24:42,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-01-27 19:24:42,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 4390 transitions. [2023-01-27 19:24:42,745 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4597821533305404 [2023-01-27 19:24:42,745 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 4390 transitions. [2023-01-27 19:24:42,745 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 4390 transitions. [2023-01-27 19:24:42,747 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:24:42,747 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 4390 transitions. [2023-01-27 19:24:42,753 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 313.57142857142856) internal successors, (4390), 14 states have internal predecessors, (4390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:24:42,761 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 682.0) internal successors, (10230), 15 states have internal predecessors, (10230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:24:42,762 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 682.0) internal successors, (10230), 15 states have internal predecessors, (10230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:24:42,762 INFO L175 Difference]: Start difference. First operand has 128 places, 137 transitions, 423 flow. Second operand 14 states and 4390 transitions. [2023-01-27 19:24:42,762 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 201 transitions, 977 flow [2023-01-27 19:24:43,787 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 201 transitions, 977 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-01-27 19:24:43,789 INFO L231 Difference]: Finished difference. Result has 142 places, 144 transitions, 499 flow [2023-01-27 19:24:43,790 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=423, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=499, PETRI_PLACES=142, PETRI_TRANSITIONS=144} [2023-01-27 19:24:43,790 INFO L281 CegarLoopForPetriNet]: 108 programPoint places, 34 predicate places. [2023-01-27 19:24:43,790 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 144 transitions, 499 flow [2023-01-27 19:24:43,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 303.92857142857144) internal successors, (4255), 14 states have internal predecessors, (4255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:24:43,791 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:24:43,791 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 19:24:43,797 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 19:24:43,996 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,SelfDestructingSolverStorable14 [2023-01-27 19:24:43,997 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-01-27 19:24:43,997 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:24:43,997 INFO L85 PathProgramCache]: Analyzing trace with hash -672124409, now seen corresponding path program 1 times [2023-01-27 19:24:43,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:24:43,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007063084] [2023-01-27 19:24:43,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:24:43,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:24:44,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:24:44,331 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-01-27 19:24:44,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:24:44,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007063084] [2023-01-27 19:24:44,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007063084] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 19:24:44,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767015742] [2023-01-27 19:24:44,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:24:44,332 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:24:44,332 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 19:24:44,333 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 19:24:44,335 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 19:24:44,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:24:44,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 22 conjunts are in the unsatisfiable core [2023-01-27 19:24:44,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 19:24:44,449 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2023-01-27 19:24:44,501 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-01-27 19:24:44,501 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-01-27 19:24:44,523 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2023-01-27 19:24:44,544 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2023-01-27 19:24:44,573 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-01-27 19:24:44,573 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 19:24:56,734 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-01-27 19:24:56,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1767015742] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 19:24:56,734 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 19:24:56,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2023-01-27 19:24:56,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768786334] [2023-01-27 19:24:56,734 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 19:24:56,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-01-27 19:24:56,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:24:56,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-01-27 19:24:56,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=93, Unknown=4, NotChecked=0, Total=132 [2023-01-27 19:24:56,737 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 259 out of 682 [2023-01-27 19:24:56,739 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 144 transitions, 499 flow. Second operand has 12 states, 12 states have (on average 261.9166666666667) internal successors, (3143), 12 states have internal predecessors, (3143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:24:56,739 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:24:56,739 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 259 of 682 [2023-01-27 19:24:56,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:26:17,398 INFO L130 PetriNetUnfolder]: 800226/1094875 cut-off events. [2023-01-27 19:26:17,399 INFO L131 PetriNetUnfolder]: For 220928/220946 co-relation queries the response was YES. [2023-01-27 19:26:20,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2341341 conditions, 1094875 events. 800226/1094875 cut-off events. For 220928/220946 co-relation queries the response was YES. Maximal size of possible extension queue 24430. Compared 8973965 event pairs, 121699 based on Foata normal form. 12/951571 useless extension candidates. Maximal degree in co-relation 2341267. Up to 711006 conditions per place. [2023-01-27 19:26:24,686 INFO L137 encePairwiseOnDemand]: 666/682 looper letters, 343 selfloop transitions, 43 changer transitions 0/405 dead transitions. [2023-01-27 19:26:24,687 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 405 transitions, 1974 flow [2023-01-27 19:26:24,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-01-27 19:26:24,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-01-27 19:26:24,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 2169 transitions. [2023-01-27 19:26:24,690 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4543359865940511 [2023-01-27 19:26:24,690 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 2169 transitions. [2023-01-27 19:26:24,690 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 2169 transitions. [2023-01-27 19:26:24,691 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:26:24,691 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 2169 transitions. [2023-01-27 19:26:24,693 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 309.85714285714283) internal successors, (2169), 7 states have internal predecessors, (2169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:26:24,697 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 682.0) internal successors, (5456), 8 states have internal predecessors, (5456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:26:24,697 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 682.0) internal successors, (5456), 8 states have internal predecessors, (5456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:26:24,697 INFO L175 Difference]: Start difference. First operand has 142 places, 144 transitions, 499 flow. Second operand 7 states and 2169 transitions. [2023-01-27 19:26:24,697 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 405 transitions, 1974 flow [2023-01-27 19:26:29,685 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 405 transitions, 1897 flow, removed 28 selfloop flow, removed 10 redundant places. [2023-01-27 19:26:29,687 INFO L231 Difference]: Finished difference. Result has 144 places, 169 transitions, 727 flow [2023-01-27 19:26:29,687 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=429, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=727, PETRI_PLACES=144, PETRI_TRANSITIONS=169} [2023-01-27 19:26:29,688 INFO L281 CegarLoopForPetriNet]: 108 programPoint places, 36 predicate places. [2023-01-27 19:26:29,688 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 169 transitions, 727 flow [2023-01-27 19:26:29,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 261.9166666666667) internal successors, (3143), 12 states have internal predecessors, (3143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:26:29,689 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:26:29,689 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 19:26:29,697 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 19:26:29,889 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,SelfDestructingSolverStorable15 [2023-01-27 19:26:29,889 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-01-27 19:26:29,890 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:26:29,890 INFO L85 PathProgramCache]: Analyzing trace with hash -1395362984, now seen corresponding path program 1 times [2023-01-27 19:26:29,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:26:29,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586347415] [2023-01-27 19:26:29,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:26:29,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:26:29,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:26:29,948 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-01-27 19:26:29,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:26:29,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586347415] [2023-01-27 19:26:29,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586347415] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 19:26:29,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016824579] [2023-01-27 19:26:29,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:26:29,949 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:26:29,949 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 19:26:29,950 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 19:26:29,963 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 19:26:30,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:26:30,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 4 conjunts are in the unsatisfiable core [2023-01-27 19:26:30,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 19:26:30,082 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-01-27 19:26:30,082 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 19:26:30,108 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-01-27 19:26:30,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2016824579] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 19:26:30,108 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 19:26:30,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2023-01-27 19:26:30,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080507316] [2023-01-27 19:26:30,108 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 19:26:30,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-01-27 19:26:30,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:26:30,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-01-27 19:26:30,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2023-01-27 19:26:30,111 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 308 out of 682 [2023-01-27 19:26:30,112 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 169 transitions, 727 flow. Second operand has 9 states, 9 states have (on average 310.8888888888889) internal successors, (2798), 9 states have internal predecessors, (2798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:26:30,112 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:26:30,112 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 308 of 682 [2023-01-27 19:26:30,112 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:26:36,562 INFO L130 PetriNetUnfolder]: 62797/93160 cut-off events. [2023-01-27 19:26:36,562 INFO L131 PetriNetUnfolder]: For 81871/81871 co-relation queries the response was YES. [2023-01-27 19:26:36,833 INFO L83 FinitePrefix]: Finished finitePrefix Result has 251105 conditions, 93160 events. 62797/93160 cut-off events. For 81871/81871 co-relation queries the response was YES. Maximal size of possible extension queue 2476. Compared 710276 event pairs, 1477 based on Foata normal form. 7580/93526 useless extension candidates. Maximal degree in co-relation 241080. Up to 58758 conditions per place. [2023-01-27 19:26:37,140 INFO L137 encePairwiseOnDemand]: 679/682 looper letters, 212 selfloop transitions, 4 changer transitions 0/229 dead transitions. [2023-01-27 19:26:37,140 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 229 transitions, 1319 flow [2023-01-27 19:26:37,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-27 19:26:37,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-27 19:26:37,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 2010 transitions. [2023-01-27 19:26:37,143 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4912023460410557 [2023-01-27 19:26:37,143 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 2010 transitions. [2023-01-27 19:26:37,143 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 2010 transitions. [2023-01-27 19:26:37,144 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:26:37,144 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 2010 transitions. [2023-01-27 19:26:37,146 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 335.0) internal successors, (2010), 6 states have internal predecessors, (2010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:26:37,149 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 682.0) internal successors, (4774), 7 states have internal predecessors, (4774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:26:37,149 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 682.0) internal successors, (4774), 7 states have internal predecessors, (4774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:26:37,149 INFO L175 Difference]: Start difference. First operand has 144 places, 169 transitions, 727 flow. Second operand 6 states and 2010 transitions. [2023-01-27 19:26:37,149 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 229 transitions, 1319 flow [2023-01-27 19:26:37,317 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 229 transitions, 1267 flow, removed 22 selfloop flow, removed 6 redundant places. [2023-01-27 19:26:37,319 INFO L231 Difference]: Finished difference. Result has 103 places, 99 transitions, 366 flow [2023-01-27 19:26:37,319 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=682, PETRI_DIFFERENCE_MINUEND_FLOW=358, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=366, PETRI_PLACES=103, PETRI_TRANSITIONS=99} [2023-01-27 19:26:37,319 INFO L281 CegarLoopForPetriNet]: 108 programPoint places, -5 predicate places. [2023-01-27 19:26:37,319 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 99 transitions, 366 flow [2023-01-27 19:26:37,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 310.8888888888889) internal successors, (2798), 9 states have internal predecessors, (2798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:26:37,320 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:26:37,320 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 4, 3, 3, 1, 1, 1, 1, 1, 1] [2023-01-27 19:26:37,325 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 19:26:37,521 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,SelfDestructingSolverStorable16 [2023-01-27 19:26:37,521 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-01-27 19:26:37,521 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:26:37,522 INFO L85 PathProgramCache]: Analyzing trace with hash 562120399, now seen corresponding path program 1 times [2023-01-27 19:26:37,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:26:37,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377824231] [2023-01-27 19:26:37,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:26:37,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:26:37,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 19:26:37,543 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-27 19:26:37,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 19:26:37,560 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-27 19:26:37,560 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-27 19:26:37,560 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2023-01-27 19:26:37,561 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (5 of 7 remaining) [2023-01-27 19:26:37,563 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (4 of 7 remaining) [2023-01-27 19:26:37,563 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 7 remaining) [2023-01-27 19:26:37,563 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 7 remaining) [2023-01-27 19:26:37,563 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 7 remaining) [2023-01-27 19:26:37,563 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 7 remaining) [2023-01-27 19:26:37,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-01-27 19:26:37,564 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1] [2023-01-27 19:26:37,564 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-27 19:26:37,564 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-01-27 19:26:37,601 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-01-27 19:26:37,786 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 378 places, 459 transitions, 962 flow [2023-01-27 19:26:37,949 INFO L130 PetriNetUnfolder]: 230/1197 cut-off events. [2023-01-27 19:26:37,949 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-01-27 19:26:37,973 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1252 conditions, 1197 events. 230/1197 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 6699 event pairs, 6 based on Foata normal form. 0/953 useless extension candidates. Maximal degree in co-relation 892. Up to 32 conditions per place. [2023-01-27 19:26:37,973 INFO L82 GeneralOperation]: Start removeDead. Operand has 378 places, 459 transitions, 962 flow [2023-01-27 19:26:37,986 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 378 places, 459 transitions, 962 flow [2023-01-27 19:26:37,986 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-27 19:26:37,987 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 378 places, 459 transitions, 962 flow [2023-01-27 19:26:37,987 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 378 places, 459 transitions, 962 flow [2023-01-27 19:26:37,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 378 places, 459 transitions, 962 flow [2023-01-27 19:26:38,120 INFO L130 PetriNetUnfolder]: 230/1197 cut-off events. [2023-01-27 19:26:38,120 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-01-27 19:26:38,134 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1252 conditions, 1197 events. 230/1197 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 6699 event pairs, 6 based on Foata normal form. 0/953 useless extension candidates. Maximal degree in co-relation 892. Up to 32 conditions per place. [2023-01-27 19:26:38,196 INFO L119 LiptonReduction]: Number of co-enabled transitions 139656 [2023-01-27 19:26:41,673 INFO L134 LiptonReduction]: Checked pairs total: 247744 [2023-01-27 19:26:41,673 INFO L136 LiptonReduction]: Total number of compositions: 348 [2023-01-27 19:26:41,674 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-27 19:26:41,674 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;@2f21b194, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-27 19:26:41,674 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2023-01-27 19:26:41,676 INFO L130 PetriNetUnfolder]: 12/44 cut-off events. [2023-01-27 19:26:41,676 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-01-27 19:26:41,676 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:26:41,676 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-01-27 19:26:41,677 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2023-01-27 19:26:41,677 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:26:41,677 INFO L85 PathProgramCache]: Analyzing trace with hash 230351614, now seen corresponding path program 1 times [2023-01-27 19:26:41,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:26:41,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606021403] [2023-01-27 19:26:41,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:26:41,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:26:41,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:26:41,698 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:26:41,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:26:41,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606021403] [2023-01-27 19:26:41,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606021403] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 19:26:41,698 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 19:26:41,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-27 19:26:41,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810359553] [2023-01-27 19:26:41,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 19:26:41,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 19:26:41,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:26:41,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 19:26:41,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 19:26:41,700 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 364 out of 807 [2023-01-27 19:26:41,701 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 198 transitions, 440 flow. Second operand has 3 states, 3 states have (on average 366.0) internal successors, (1098), 3 states have internal predecessors, (1098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:26:41,701 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:26:41,701 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 364 of 807 [2023-01-27 19:26:41,701 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand