/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_73-funloop_hard_racefree.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-b8dbc81 [2023-01-27 19:20:25,416 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-01-27 19:20:25,418 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-01-27 19:20:25,448 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-01-27 19:20:25,449 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-01-27 19:20:25,451 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-01-27 19:20:25,453 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-01-27 19:20:25,454 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-01-27 19:20:25,455 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-01-27 19:20:25,459 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-01-27 19:20:25,460 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-01-27 19:20:25,461 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-01-27 19:20:25,461 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-01-27 19:20:25,463 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-01-27 19:20:25,466 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-01-27 19:20:25,467 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-01-27 19:20:25,467 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-01-27 19:20:25,468 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-01-27 19:20:25,469 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-01-27 19:20:25,472 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-01-27 19:20:25,473 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-01-27 19:20:25,474 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-01-27 19:20:25,475 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-01-27 19:20:25,475 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-01-27 19:20:25,481 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-01-27 19:20:25,487 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-01-27 19:20:25,487 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-01-27 19:20:25,488 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-01-27 19:20:25,489 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 19:20:25,510 INFO L113 SettingsManager]: Loading preferences was successful [2023-01-27 19:20:25,511 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-01-27 19:20:25,511 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-01-27 19:20:25,512 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-01-27 19:20:25,512 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-01-27 19:20:25,512 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-01-27 19:20:25,512 INFO L138 SettingsManager]: * Use SBE=true [2023-01-27 19:20:25,513 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-01-27 19:20:25,513 INFO L138 SettingsManager]: * sizeof long=4 [2023-01-27 19:20:25,513 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-01-27 19:20:25,513 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-01-27 19:20:25,513 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-01-27 19:20:25,513 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-01-27 19:20:25,513 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-01-27 19:20:25,514 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-01-27 19:20:25,514 INFO L138 SettingsManager]: * sizeof long double=12 [2023-01-27 19:20:25,514 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-01-27 19:20:25,514 INFO L138 SettingsManager]: * Use constant arrays=true [2023-01-27 19:20:25,514 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-01-27 19:20:25,514 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-01-27 19:20:25,514 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-01-27 19:20:25,514 INFO L138 SettingsManager]: * To the following directory=./dump/ [2023-01-27 19:20:25,514 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-01-27 19:20:25,514 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-27 19:20:25,514 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-01-27 19:20:25,514 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-01-27 19:20:25,515 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-01-27 19:20:25,515 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-01-27 19:20:25,515 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-01-27 19:20:25,515 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-01-27 19:20:25,515 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-01-27 19:20:25,515 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-01-27 19:20:25,701 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-01-27 19:20:25,727 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-01-27 19:20:25,729 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-01-27 19:20:25,729 INFO L271 PluginConnector]: Initializing CDTParser... [2023-01-27 19:20:25,730 INFO L275 PluginConnector]: CDTParser initialized [2023-01-27 19:20:25,730 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_73-funloop_hard_racefree.i [2023-01-27 19:20:26,883 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-01-27 19:20:27,109 INFO L351 CDTParser]: Found 1 translation units. [2023-01-27 19:20:27,110 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_73-funloop_hard_racefree.i [2023-01-27 19:20:27,131 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/399d0bdad/ed473dde5fc146b9b600b527207f3224/FLAGe0d5b6382 [2023-01-27 19:20:27,144 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/399d0bdad/ed473dde5fc146b9b600b527207f3224 [2023-01-27 19:20:27,146 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-01-27 19:20:27,147 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2023-01-27 19:20:27,149 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-01-27 19:20:27,149 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-01-27 19:20:27,151 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-01-27 19:20:27,152 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 07:20:27" (1/1) ... [2023-01-27 19:20:27,153 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@381327bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:20:27, skipping insertion in model container [2023-01-27 19:20:27,153 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 07:20:27" (1/1) ... [2023-01-27 19:20:27,158 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-01-27 19:20:27,194 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-01-27 19:20:27,534 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_73-funloop_hard_racefree.i[41323,41336] [2023-01-27 19:20:27,560 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-27 19:20:27,580 INFO L203 MainTranslator]: Completed pre-run [2023-01-27 19:20:27,612 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_73-funloop_hard_racefree.i[41323,41336] [2023-01-27 19:20:27,633 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-27 19:20:27,680 INFO L208 MainTranslator]: Completed translation [2023-01-27 19:20:27,680 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:20:27 WrapperNode [2023-01-27 19:20:27,681 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-01-27 19:20:27,681 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-01-27 19:20:27,682 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-01-27 19:20:27,682 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-01-27 19:20:27,686 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:20:27" (1/1) ... [2023-01-27 19:20:27,710 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:20:27" (1/1) ... [2023-01-27 19:20:27,737 INFO L138 Inliner]: procedures = 271, calls = 41, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 250 [2023-01-27 19:20:27,737 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-01-27 19:20:27,738 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-01-27 19:20:27,738 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-01-27 19:20:27,738 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-01-27 19:20:27,744 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:20:27" (1/1) ... [2023-01-27 19:20:27,744 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:20:27" (1/1) ... [2023-01-27 19:20:27,758 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:20:27" (1/1) ... [2023-01-27 19:20:27,759 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:20:27" (1/1) ... [2023-01-27 19:20:27,764 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:20:27" (1/1) ... [2023-01-27 19:20:27,775 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:20:27" (1/1) ... [2023-01-27 19:20:27,776 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:20:27" (1/1) ... [2023-01-27 19:20:27,777 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:20:27" (1/1) ... [2023-01-27 19:20:27,785 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-01-27 19:20:27,786 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-01-27 19:20:27,786 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-01-27 19:20:27,786 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-01-27 19:20:27,787 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:20:27" (1/1) ... [2023-01-27 19:20:27,791 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-27 19:20:27,799 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 19:20:27,824 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 19:20:27,873 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 19:20:27,885 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-01-27 19:20:27,886 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-01-27 19:20:27,886 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-01-27 19:20:27,886 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-01-27 19:20:27,886 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-01-27 19:20:27,886 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-01-27 19:20:27,886 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-01-27 19:20:27,886 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-01-27 19:20:27,886 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-01-27 19:20:27,887 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-01-27 19:20:27,887 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-01-27 19:20:27,888 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 19:20:28,033 INFO L236 CfgBuilder]: Building ICFG [2023-01-27 19:20:28,034 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-01-27 19:20:28,251 INFO L277 CfgBuilder]: Performing block encoding [2023-01-27 19:20:28,256 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-01-27 19:20:28,256 INFO L302 CfgBuilder]: Removed 35 assume(true) statements. [2023-01-27 19:20:28,258 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 07:20:28 BoogieIcfgContainer [2023-01-27 19:20:28,258 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-01-27 19:20:28,260 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-01-27 19:20:28,260 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-01-27 19:20:28,262 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-01-27 19:20:28,263 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.01 07:20:27" (1/3) ... [2023-01-27 19:20:28,263 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@242fba9f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 07:20:28, skipping insertion in model container [2023-01-27 19:20:28,263 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:20:27" (2/3) ... [2023-01-27 19:20:28,263 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@242fba9f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 07:20:28, skipping insertion in model container [2023-01-27 19:20:28,263 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 07:20:28" (3/3) ... [2023-01-27 19:20:28,264 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_73-funloop_hard_racefree.i [2023-01-27 19:20:28,276 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-01-27 19:20:28,276 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2023-01-27 19:20:28,276 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-01-27 19:20:28,406 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-01-27 19:20:28,438 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 204 places, 246 transitions, 500 flow [2023-01-27 19:20:28,538 INFO L130 PetriNetUnfolder]: 73/381 cut-off events. [2023-01-27 19:20:28,538 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-01-27 19:20:28,545 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 19:20:28,545 INFO L82 GeneralOperation]: Start removeDead. Operand has 204 places, 246 transitions, 500 flow [2023-01-27 19:20:28,554 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 200 places, 241 transitions, 487 flow [2023-01-27 19:20:28,557 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-27 19:20:28,566 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 200 places, 241 transitions, 487 flow [2023-01-27 19:20:28,569 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 200 places, 241 transitions, 487 flow [2023-01-27 19:20:28,569 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 200 places, 241 transitions, 487 flow [2023-01-27 19:20:28,603 INFO L130 PetriNetUnfolder]: 72/376 cut-off events. [2023-01-27 19:20:28,604 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-27 19:20:28,608 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 19:20:28,614 INFO L119 LiptonReduction]: Number of co-enabled transitions 19458 [2023-01-27 19:20:30,744 INFO L134 LiptonReduction]: Checked pairs total: 28650 [2023-01-27 19:20:30,744 INFO L136 LiptonReduction]: Total number of compositions: 184 [2023-01-27 19:20:30,754 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-27 19:20:30,758 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;@72966b15, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-27 19:20:30,759 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-01-27 19:20:30,763 INFO L130 PetriNetUnfolder]: 9/39 cut-off events. [2023-01-27 19:20:30,763 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-27 19:20:30,763 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:20:30,764 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-01-27 19:20:30,764 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 19:20:30,767 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:20:30,768 INFO L85 PathProgramCache]: Analyzing trace with hash -454048497, now seen corresponding path program 1 times [2023-01-27 19:20:30,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:20:30,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547059670] [2023-01-27 19:20:30,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:20:30,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:20:30,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:20:30,911 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 19:20:30,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:20:30,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547059670] [2023-01-27 19:20:30,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547059670] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 19:20:30,912 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 19:20:30,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-27 19:20:30,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42321301] [2023-01-27 19:20:30,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 19:20:30,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 19:20:30,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:20:30,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 19:20:30,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 19:20:30,937 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 196 out of 430 [2023-01-27 19:20:30,939 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 19:20:30,939 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:20:30,939 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 196 of 430 [2023-01-27 19:20:30,940 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:20:31,103 INFO L130 PetriNetUnfolder]: 579/1212 cut-off events. [2023-01-27 19:20:31,103 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-27 19:20:31,104 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 19:20:31,108 INFO L137 encePairwiseOnDemand]: 396/430 looper letters, 51 selfloop transitions, 2 changer transitions 0/66 dead transitions. [2023-01-27 19:20:31,108 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 66 transitions, 243 flow [2023-01-27 19:20:31,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 19:20:31,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 19:20:31,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 673 transitions. [2023-01-27 19:20:31,123 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5217054263565891 [2023-01-27 19:20:31,124 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 673 transitions. [2023-01-27 19:20:31,125 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 673 transitions. [2023-01-27 19:20:31,127 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:20:31,129 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 673 transitions. [2023-01-27 19:20:31,133 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 19:20:31,139 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 19:20:31,140 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 19:20:31,141 INFO L175 Difference]: Start difference. First operand has 63 places, 96 transitions, 197 flow. Second operand 3 states and 673 transitions. [2023-01-27 19:20:31,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 66 transitions, 243 flow [2023-01-27 19:20:31,143 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 19:20:31,145 INFO L231 Difference]: Finished difference. Result has 65 places, 66 transitions, 147 flow [2023-01-27 19:20:31,147 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 19:20:31,149 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 2 predicate places. [2023-01-27 19:20:31,149 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 66 transitions, 147 flow [2023-01-27 19:20:31,150 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 19:20:31,150 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:20:31,150 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-01-27 19:20:31,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-01-27 19:20:31,151 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 19:20:31,157 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:20:31,157 INFO L85 PathProgramCache]: Analyzing trace with hash 584833530, now seen corresponding path program 1 times [2023-01-27 19:20:31,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:20:31,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555200180] [2023-01-27 19:20:31,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:20:31,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:20:31,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:20:31,259 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 19:20:31,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:20:31,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555200180] [2023-01-27 19:20:31,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555200180] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 19:20:31,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497869867] [2023-01-27 19:20:31,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:20:31,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:20:31,260 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 19:20:31,287 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 19:20:31,292 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 19:20:31,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:20:31,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 3 conjunts are in the unsatisfiable core [2023-01-27 19:20:31,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 19:20:31,442 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 19:20:31,442 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 19:20:31,454 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 19:20:31,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [497869867] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 19:20:31,455 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 19:20:31,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-01-27 19:20:31,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888052983] [2023-01-27 19:20:31,455 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 19:20:31,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-01-27 19:20:31,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:20:31,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-01-27 19:20:31,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-01-27 19:20:31,458 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 196 out of 430 [2023-01-27 19:20:31,460 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 19:20:31,460 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:20:31,460 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 196 of 430 [2023-01-27 19:20:31,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:20:31,653 INFO L130 PetriNetUnfolder]: 579/1215 cut-off events. [2023-01-27 19:20:31,653 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-27 19:20:31,655 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 19:20:31,659 INFO L137 encePairwiseOnDemand]: 427/430 looper letters, 51 selfloop transitions, 5 changer transitions 0/69 dead transitions. [2023-01-27 19:20:31,659 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 69 transitions, 271 flow [2023-01-27 19:20:31,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-27 19:20:31,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-27 19:20:31,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1235 transitions. [2023-01-27 19:20:31,661 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4786821705426357 [2023-01-27 19:20:31,661 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1235 transitions. [2023-01-27 19:20:31,661 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1235 transitions. [2023-01-27 19:20:31,662 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:20:31,662 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1235 transitions. [2023-01-27 19:20:31,665 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 19:20:31,668 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 19:20:31,669 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 19:20:31,669 INFO L175 Difference]: Start difference. First operand has 65 places, 66 transitions, 147 flow. Second operand 6 states and 1235 transitions. [2023-01-27 19:20:31,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 69 transitions, 271 flow [2023-01-27 19:20:31,671 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 19:20:31,672 INFO L231 Difference]: Finished difference. Result has 72 places, 69 transitions, 179 flow [2023-01-27 19:20:31,672 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 19:20:31,673 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 9 predicate places. [2023-01-27 19:20:31,673 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 69 transitions, 179 flow [2023-01-27 19:20:31,674 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 19:20:31,674 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:20:31,674 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1] [2023-01-27 19:20:31,697 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 19:20:31,878 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 19:20:31,879 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 19:20:31,880 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:20:31,880 INFO L85 PathProgramCache]: Analyzing trace with hash -451628733, now seen corresponding path program 2 times [2023-01-27 19:20:31,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:20:31,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579718180] [2023-01-27 19:20:31,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:20:31,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:20:31,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:20:31,980 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 19:20:31,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:20:31,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579718180] [2023-01-27 19:20:31,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579718180] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 19:20:31,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281779864] [2023-01-27 19:20:31,982 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 19:20:31,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:20:31,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 19:20:31,984 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 19:20:31,986 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 19:20:32,043 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 19:20:32,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 19:20:32,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-27 19:20:32,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 19:20:32,058 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 19:20:32,058 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 19:20:32,103 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 19:20:32,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [281779864] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 19:20:32,104 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 19:20:32,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-01-27 19:20:32,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032651695] [2023-01-27 19:20:32,104 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 19:20:32,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-01-27 19:20:32,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:20:32,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-01-27 19:20:32,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-01-27 19:20:32,108 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 196 out of 430 [2023-01-27 19:20:32,110 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 19:20:32,110 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:20:32,110 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 196 of 430 [2023-01-27 19:20:32,110 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:20:32,282 INFO L130 PetriNetUnfolder]: 579/1221 cut-off events. [2023-01-27 19:20:32,282 INFO L131 PetriNetUnfolder]: For 20/20 co-relation queries the response was YES. [2023-01-27 19:20:32,284 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 19:20:32,288 INFO L137 encePairwiseOnDemand]: 427/430 looper letters, 51 selfloop transitions, 11 changer transitions 0/75 dead transitions. [2023-01-27 19:20:32,288 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 75 transitions, 339 flow [2023-01-27 19:20:32,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-01-27 19:20:32,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-01-27 19:20:32,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2420 transitions. [2023-01-27 19:20:32,292 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4689922480620155 [2023-01-27 19:20:32,292 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2420 transitions. [2023-01-27 19:20:32,293 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2420 transitions. [2023-01-27 19:20:32,294 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:20:32,294 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2420 transitions. [2023-01-27 19:20:32,297 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 19:20:32,303 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 19:20:32,306 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 19:20:32,306 INFO L175 Difference]: Start difference. First operand has 72 places, 69 transitions, 179 flow. Second operand 12 states and 2420 transitions. [2023-01-27 19:20:32,306 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 75 transitions, 339 flow [2023-01-27 19:20:32,308 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 19:20:32,309 INFO L231 Difference]: Finished difference. Result has 88 places, 75 transitions, 249 flow [2023-01-27 19:20:32,309 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 19:20:32,310 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 25 predicate places. [2023-01-27 19:20:32,310 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 75 transitions, 249 flow [2023-01-27 19:20:32,311 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 19:20:32,311 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:20:32,311 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1] [2023-01-27 19:20:32,318 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-01-27 19:20:32,515 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 19:20:32,518 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 19:20:32,519 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:20:32,519 INFO L85 PathProgramCache]: Analyzing trace with hash 1666983395, now seen corresponding path program 3 times [2023-01-27 19:20:32,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:20:32,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050545250] [2023-01-27 19:20:32,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:20:32,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:20:32,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 19:20:32,583 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-27 19:20:32,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 19:20:32,627 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-27 19:20:32,628 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-27 19:20:32,629 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2023-01-27 19:20:32,633 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2023-01-27 19:20:32,633 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2023-01-27 19:20:32,636 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2023-01-27 19:20:32,637 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2023-01-27 19:20:32,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-01-27 19:20:32,637 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1] [2023-01-27 19:20:32,639 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-27 19:20:32,639 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-01-27 19:20:32,669 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-01-27 19:20:32,672 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 262 places, 317 transitions, 652 flow [2023-01-27 19:20:32,718 INFO L130 PetriNetUnfolder]: 118/611 cut-off events. [2023-01-27 19:20:32,718 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-01-27 19:20:32,723 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 19:20:32,723 INFO L82 GeneralOperation]: Start removeDead. Operand has 262 places, 317 transitions, 652 flow [2023-01-27 19:20:32,727 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 262 places, 317 transitions, 652 flow [2023-01-27 19:20:32,728 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-27 19:20:32,728 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 262 places, 317 transitions, 652 flow [2023-01-27 19:20:32,728 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 262 places, 317 transitions, 652 flow [2023-01-27 19:20:32,728 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 262 places, 317 transitions, 652 flow [2023-01-27 19:20:32,794 INFO L130 PetriNetUnfolder]: 118/611 cut-off events. [2023-01-27 19:20:32,794 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-01-27 19:20:32,797 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 19:20:32,813 INFO L119 LiptonReduction]: Number of co-enabled transitions 49956 [2023-01-27 19:20:35,344 INFO L134 LiptonReduction]: Checked pairs total: 86365 [2023-01-27 19:20:35,344 INFO L136 LiptonReduction]: Total number of compositions: 242 [2023-01-27 19:20:35,345 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-27 19:20:35,346 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;@72966b15, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-27 19:20:35,346 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-01-27 19:20:35,348 INFO L130 PetriNetUnfolder]: 9/40 cut-off events. [2023-01-27 19:20:35,348 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-01-27 19:20:35,348 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:20:35,348 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-01-27 19:20:35,348 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 19:20:35,349 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:20:35,349 INFO L85 PathProgramCache]: Analyzing trace with hash 1440537533, now seen corresponding path program 1 times [2023-01-27 19:20:35,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:20:35,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910330632] [2023-01-27 19:20:35,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:20:35,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:20:35,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:20:35,366 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 19:20:35,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:20:35,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910330632] [2023-01-27 19:20:35,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910330632] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 19:20:35,366 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 19:20:35,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-27 19:20:35,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316393442] [2023-01-27 19:20:35,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 19:20:35,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 19:20:35,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:20:35,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 19:20:35,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 19:20:35,368 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 252 out of 559 [2023-01-27 19:20:35,368 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 19:20:35,368 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:20:35,368 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 252 of 559 [2023-01-27 19:20:35,368 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:20:37,118 INFO L130 PetriNetUnfolder]: 19961/30642 cut-off events. [2023-01-27 19:20:37,118 INFO L131 PetriNetUnfolder]: For 124/124 co-relation queries the response was YES. [2023-01-27 19:20:37,158 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 19:20:37,264 INFO L137 encePairwiseOnDemand]: 516/559 looper letters, 73 selfloop transitions, 2 changer transitions 0/93 dead transitions. [2023-01-27 19:20:37,264 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 93 transitions, 354 flow [2023-01-27 19:20:37,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 19:20:37,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 19:20:37,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 872 transitions. [2023-01-27 19:20:37,267 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5199761478831246 [2023-01-27 19:20:37,267 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 872 transitions. [2023-01-27 19:20:37,267 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 872 transitions. [2023-01-27 19:20:37,267 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:20:37,267 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 872 transitions. [2023-01-27 19:20:37,268 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 19:20:37,270 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 19:20:37,270 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 19:20:37,271 INFO L175 Difference]: Start difference. First operand has 87 places, 132 transitions, 282 flow. Second operand 3 states and 872 transitions. [2023-01-27 19:20:37,271 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 93 transitions, 354 flow [2023-01-27 19:20:37,272 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 19:20:37,273 INFO L231 Difference]: Finished difference. Result has 90 places, 93 transitions, 214 flow [2023-01-27 19:20:37,273 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 19:20:37,274 INFO L281 CegarLoopForPetriNet]: 87 programPoint places, 3 predicate places. [2023-01-27 19:20:37,274 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 93 transitions, 214 flow [2023-01-27 19:20:37,274 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 19:20:37,274 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:20:37,274 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 19:20:37,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-01-27 19:20:37,275 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 19:20:37,275 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:20:37,275 INFO L85 PathProgramCache]: Analyzing trace with hash 38811947, now seen corresponding path program 1 times [2023-01-27 19:20:37,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:20:37,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184950368] [2023-01-27 19:20:37,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:20:37,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:20:37,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:20:37,297 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 19:20:37,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:20:37,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184950368] [2023-01-27 19:20:37,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184950368] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 19:20:37,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003995909] [2023-01-27 19:20:37,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:20:37,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:20:37,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 19:20:37,327 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 19:20:37,341 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 19:20:37,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:20:37,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 2 conjunts are in the unsatisfiable core [2023-01-27 19:20:37,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 19:20:37,405 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 19:20:37,405 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-01-27 19:20:37,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1003995909] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 19:20:37,405 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-01-27 19:20:37,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-01-27 19:20:37,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122297345] [2023-01-27 19:20:37,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 19:20:37,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 19:20:37,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:20:37,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 19:20:37,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-01-27 19:20:37,407 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 252 out of 559 [2023-01-27 19:20:37,407 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 19:20:37,407 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:20:37,407 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 252 of 559 [2023-01-27 19:20:37,407 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:20:39,064 INFO L130 PetriNetUnfolder]: 19644/30266 cut-off events. [2023-01-27 19:20:39,064 INFO L131 PetriNetUnfolder]: For 77/77 co-relation queries the response was YES. [2023-01-27 19:20:39,109 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 19:20:39,197 INFO L137 encePairwiseOnDemand]: 556/559 looper letters, 91 selfloop transitions, 2 changer transitions 0/111 dead transitions. [2023-01-27 19:20:39,197 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 111 transitions, 436 flow [2023-01-27 19:20:39,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 19:20:39,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 19:20:39,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 849 transitions. [2023-01-27 19:20:39,201 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5062611806797853 [2023-01-27 19:20:39,202 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 849 transitions. [2023-01-27 19:20:39,202 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 849 transitions. [2023-01-27 19:20:39,202 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:20:39,202 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 849 transitions. [2023-01-27 19:20:39,203 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 19:20:39,205 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 19:20:39,205 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 19:20:39,205 INFO L175 Difference]: Start difference. First operand has 90 places, 93 transitions, 214 flow. Second operand 3 states and 849 transitions. [2023-01-27 19:20:39,205 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 111 transitions, 436 flow [2023-01-27 19:20:39,207 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 19:20:39,209 INFO L231 Difference]: Finished difference. Result has 92 places, 94 transitions, 222 flow [2023-01-27 19:20:39,209 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 19:20:39,212 INFO L281 CegarLoopForPetriNet]: 87 programPoint places, 5 predicate places. [2023-01-27 19:20:39,212 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 94 transitions, 222 flow [2023-01-27 19:20:39,212 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 19:20:39,212 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:20:39,212 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 19:20:39,217 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-01-27 19:20:39,416 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 19:20:39,416 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 19:20:39,418 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:20:39,418 INFO L85 PathProgramCache]: Analyzing trace with hash 762694548, now seen corresponding path program 1 times [2023-01-27 19:20:39,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:20:39,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939463629] [2023-01-27 19:20:39,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:20:39,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:20:39,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:20:39,466 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 19:20:39,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:20:39,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939463629] [2023-01-27 19:20:39,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939463629] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 19:20:39,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874281028] [2023-01-27 19:20:39,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:20:39,466 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:20:39,467 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 19:20:39,479 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 19:20:39,480 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 19:20:39,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:20:39,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 3 conjunts are in the unsatisfiable core [2023-01-27 19:20:39,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 19:20:39,557 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 19:20:39,557 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 19:20:39,566 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 19:20:39,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1874281028] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 19:20:39,566 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 19:20:39,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-01-27 19:20:39,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015986325] [2023-01-27 19:20:39,567 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 19:20:39,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-01-27 19:20:39,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:20:39,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-01-27 19:20:39,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-01-27 19:20:39,568 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 252 out of 559 [2023-01-27 19:20:39,570 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 19:20:39,570 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:20:39,570 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 252 of 559 [2023-01-27 19:20:39,570 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:20:41,061 INFO L130 PetriNetUnfolder]: 20049/30556 cut-off events. [2023-01-27 19:20:41,061 INFO L131 PetriNetUnfolder]: For 676/676 co-relation queries the response was YES. [2023-01-27 19:20:41,114 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 19:20:41,205 INFO L137 encePairwiseOnDemand]: 556/559 looper letters, 74 selfloop transitions, 5 changer transitions 0/97 dead transitions. [2023-01-27 19:20:41,206 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 97 transitions, 392 flow [2023-01-27 19:20:41,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-27 19:20:41,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-27 19:20:41,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1593 transitions. [2023-01-27 19:20:41,209 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4749552772808587 [2023-01-27 19:20:41,209 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1593 transitions. [2023-01-27 19:20:41,209 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1593 transitions. [2023-01-27 19:20:41,210 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:20:41,210 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1593 transitions. [2023-01-27 19:20:41,212 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 19:20:41,215 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 19:20:41,215 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 19:20:41,216 INFO L175 Difference]: Start difference. First operand has 92 places, 94 transitions, 222 flow. Second operand 6 states and 1593 transitions. [2023-01-27 19:20:41,216 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 97 transitions, 392 flow [2023-01-27 19:20:41,217 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 19:20:41,218 INFO L231 Difference]: Finished difference. Result has 99 places, 97 transitions, 256 flow [2023-01-27 19:20:41,218 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 19:20:41,218 INFO L281 CegarLoopForPetriNet]: 87 programPoint places, 12 predicate places. [2023-01-27 19:20:41,218 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 97 transitions, 256 flow [2023-01-27 19:20:41,219 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 19:20:41,219 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:20:41,219 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 19:20:41,240 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 19:20:41,423 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 19:20:41,423 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 19:20:41,424 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:20:41,424 INFO L85 PathProgramCache]: Analyzing trace with hash 73730964, now seen corresponding path program 2 times [2023-01-27 19:20:41,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:20:41,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685558013] [2023-01-27 19:20:41,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:20:41,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:20:41,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:20:41,502 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 19:20:41,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:20:41,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685558013] [2023-01-27 19:20:41,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685558013] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 19:20:41,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762030672] [2023-01-27 19:20:41,502 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 19:20:41,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:20:41,503 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 19:20:41,503 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 19:20:41,505 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 19:20:41,565 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-01-27 19:20:41,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 19:20:41,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 21 conjunts are in the unsatisfiable core [2023-01-27 19:20:41,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 19:20:41,593 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 19:20:41,643 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-01-27 19:20:41,644 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 19:20:41,669 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 19:20:41,708 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 19:20:41,708 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-01-27 19:20:41,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1762030672] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 19:20:41,708 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-01-27 19:20:41,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 10 [2023-01-27 19:20:41,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949577121] [2023-01-27 19:20:41,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 19:20:41,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-01-27 19:20:41,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:20:41,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-01-27 19:20:41,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2023-01-27 19:20:41,710 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 209 out of 559 [2023-01-27 19:20:41,711 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 19:20:41,711 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:20:41,712 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 209 of 559 [2023-01-27 19:20:41,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:20:44,159 INFO L130 PetriNetUnfolder]: 27970/43695 cut-off events. [2023-01-27 19:20:44,159 INFO L131 PetriNetUnfolder]: For 1064/1064 co-relation queries the response was YES. [2023-01-27 19:20:44,263 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 19:20:44,549 INFO L137 encePairwiseOnDemand]: 549/559 looper letters, 201 selfloop transitions, 16 changer transitions 0/233 dead transitions. [2023-01-27 19:20:44,550 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 233 transitions, 996 flow [2023-01-27 19:20:44,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-27 19:20:44,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-27 19:20:44,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1468 transitions. [2023-01-27 19:20:44,553 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43768634466308887 [2023-01-27 19:20:44,553 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1468 transitions. [2023-01-27 19:20:44,553 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1468 transitions. [2023-01-27 19:20:44,554 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:20:44,554 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1468 transitions. [2023-01-27 19:20:44,559 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 19:20:44,563 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 19:20:44,564 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 19:20:44,564 INFO L175 Difference]: Start difference. First operand has 99 places, 97 transitions, 256 flow. Second operand 6 states and 1468 transitions. [2023-01-27 19:20:44,565 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 233 transitions, 996 flow [2023-01-27 19:20:44,568 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 19:20:44,570 INFO L231 Difference]: Finished difference. Result has 107 places, 111 transitions, 345 flow [2023-01-27 19:20:44,570 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 19:20:44,571 INFO L281 CegarLoopForPetriNet]: 87 programPoint places, 20 predicate places. [2023-01-27 19:20:44,571 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 111 transitions, 345 flow [2023-01-27 19:20:44,572 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 19:20:44,572 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:20:44,572 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 19:20:44,576 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-01-27 19:20:44,776 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 19:20:44,776 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 19:20:44,777 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:20:44,777 INFO L85 PathProgramCache]: Analyzing trace with hash 1832831312, now seen corresponding path program 1 times [2023-01-27 19:20:44,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:20:44,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555659865] [2023-01-27 19:20:44,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:20:44,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:20:44,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:20:44,842 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 19:20:44,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:20:44,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555659865] [2023-01-27 19:20:44,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555659865] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 19:20:44,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746543301] [2023-01-27 19:20:44,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:20:44,843 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:20:44,843 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 19:20:44,844 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 19:20:44,846 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 19:20:44,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:20:44,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-27 19:20:44,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 19:20:44,940 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 19:20:44,941 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 19:20:44,978 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 19:20:44,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1746543301] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 19:20:44,979 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 19:20:44,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 6] total 14 [2023-01-27 19:20:44,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443737436] [2023-01-27 19:20:44,979 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 19:20:44,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-01-27 19:20:44,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:20:44,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-01-27 19:20:44,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2023-01-27 19:20:44,982 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 246 out of 559 [2023-01-27 19:20:44,985 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 19:20:44,985 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:20:44,985 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 246 of 559 [2023-01-27 19:20:44,985 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:20:47,495 INFO L130 PetriNetUnfolder]: 25483/40304 cut-off events. [2023-01-27 19:20:47,496 INFO L131 PetriNetUnfolder]: For 8365/8367 co-relation queries the response was YES. [2023-01-27 19:20:47,618 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 19:20:47,735 INFO L137 encePairwiseOnDemand]: 554/559 looper letters, 142 selfloop transitions, 14 changer transitions 0/174 dead transitions. [2023-01-27 19:20:47,735 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 174 transitions, 849 flow [2023-01-27 19:20:47,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-01-27 19:20:47,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-01-27 19:20:47,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 3587 transitions. [2023-01-27 19:20:47,742 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45834398159979556 [2023-01-27 19:20:47,742 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 3587 transitions. [2023-01-27 19:20:47,742 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 3587 transitions. [2023-01-27 19:20:47,744 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:20:47,744 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 3587 transitions. [2023-01-27 19:20:47,750 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 19:20:47,757 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 19:20:47,759 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 19:20:47,759 INFO L175 Difference]: Start difference. First operand has 107 places, 111 transitions, 345 flow. Second operand 14 states and 3587 transitions. [2023-01-27 19:20:47,759 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 174 transitions, 849 flow [2023-01-27 19:20:47,769 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 19:20:47,771 INFO L231 Difference]: Finished difference. Result has 121 places, 117 transitions, 415 flow [2023-01-27 19:20:47,771 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 19:20:47,772 INFO L281 CegarLoopForPetriNet]: 87 programPoint places, 34 predicate places. [2023-01-27 19:20:47,772 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 117 transitions, 415 flow [2023-01-27 19:20:47,773 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 19:20:47,773 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:20:47,773 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 3, 2, 2, 1, 1, 1, 1, 1] [2023-01-27 19:20:47,789 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 19:20:47,978 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 19:20:47,978 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 19:20:47,979 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:20:47,979 INFO L85 PathProgramCache]: Analyzing trace with hash -1872804745, now seen corresponding path program 1 times [2023-01-27 19:20:47,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:20:47,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876433848] [2023-01-27 19:20:47,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:20:47,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:20:48,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 19:20:48,011 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-27 19:20:48,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 19:20:48,034 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-27 19:20:48,036 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-27 19:20:48,036 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2023-01-27 19:20:48,036 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2023-01-27 19:20:48,036 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2023-01-27 19:20:48,036 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2023-01-27 19:20:48,036 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2023-01-27 19:20:48,037 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2023-01-27 19:20:48,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-01-27 19:20:48,037 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1] [2023-01-27 19:20:48,037 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-27 19:20:48,037 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-01-27 19:20:48,074 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-01-27 19:20:48,077 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 320 places, 388 transitions, 806 flow [2023-01-27 19:20:48,169 INFO L130 PetriNetUnfolder]: 168/872 cut-off events. [2023-01-27 19:20:48,170 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-01-27 19:20:48,181 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 19:20:48,182 INFO L82 GeneralOperation]: Start removeDead. Operand has 320 places, 388 transitions, 806 flow [2023-01-27 19:20:48,190 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 320 places, 388 transitions, 806 flow [2023-01-27 19:20:48,190 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-27 19:20:48,190 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 320 places, 388 transitions, 806 flow [2023-01-27 19:20:48,191 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 320 places, 388 transitions, 806 flow [2023-01-27 19:20:48,191 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 320 places, 388 transitions, 806 flow [2023-01-27 19:20:48,280 INFO L130 PetriNetUnfolder]: 168/872 cut-off events. [2023-01-27 19:20:48,281 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-01-27 19:20:48,292 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 19:20:48,321 INFO L119 LiptonReduction]: Number of co-enabled transitions 89838 [2023-01-27 19:20:51,223 INFO L134 LiptonReduction]: Checked pairs total: 142134 [2023-01-27 19:20:51,224 INFO L136 LiptonReduction]: Total number of compositions: 294 [2023-01-27 19:20:51,225 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-27 19:20:51,225 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;@72966b15, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-27 19:20:51,225 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-01-27 19:20:51,228 INFO L130 PetriNetUnfolder]: 12/44 cut-off events. [2023-01-27 19:20:51,228 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-01-27 19:20:51,228 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:20:51,228 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-01-27 19:20:51,228 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 19:20:51,228 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:20:51,228 INFO L85 PathProgramCache]: Analyzing trace with hash 100448795, now seen corresponding path program 1 times [2023-01-27 19:20:51,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:20:51,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252144313] [2023-01-27 19:20:51,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:20:51,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:20:51,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:20:51,273 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 19:20:51,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:20:51,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252144313] [2023-01-27 19:20:51,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252144313] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 19:20:51,274 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 19:20:51,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-27 19:20:51,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759219605] [2023-01-27 19:20:51,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 19:20:51,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 19:20:51,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:20:51,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 19:20:51,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 19:20:51,276 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 308 out of 682 [2023-01-27 19:20:51,277 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 19:20:51,277 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:20:51,277 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 308 of 682 [2023-01-27 19:20:51,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:21:27,702 INFO L130 PetriNetUnfolder]: 477490/661421 cut-off events. [2023-01-27 19:21:27,703 INFO L131 PetriNetUnfolder]: For 4158/4158 co-relation queries the response was YES. [2023-01-27 19:21:28,872 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 19:21:31,250 INFO L137 encePairwiseOnDemand]: 628/682 looper letters, 91 selfloop transitions, 2 changer transitions 0/115 dead transitions. [2023-01-27 19:21:31,250 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 115 transitions, 446 flow [2023-01-27 19:21:31,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 19:21:31,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 19:21:31,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1069 transitions. [2023-01-27 19:21:31,253 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5224828934506354 [2023-01-27 19:21:31,253 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1069 transitions. [2023-01-27 19:21:31,253 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1069 transitions. [2023-01-27 19:21:31,254 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:21:31,254 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1069 transitions. [2023-01-27 19:21:31,255 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 19:21:31,257 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 19:21:31,257 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 19:21:31,257 INFO L175 Difference]: Start difference. First operand has 108 places, 165 transitions, 360 flow. Second operand 3 states and 1069 transitions. [2023-01-27 19:21:31,257 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 115 transitions, 446 flow [2023-01-27 19:21:31,259 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 19:21:31,260 INFO L231 Difference]: Finished difference. Result has 111 places, 115 transitions, 270 flow [2023-01-27 19:21:31,260 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 19:21:31,260 INFO L281 CegarLoopForPetriNet]: 108 programPoint places, 3 predicate places. [2023-01-27 19:21:31,260 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 115 transitions, 270 flow [2023-01-27 19:21:31,261 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 19:21:31,261 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:21:31,261 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 19:21:31,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-01-27 19:21:31,261 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 19:21:31,261 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:21:31,261 INFO L85 PathProgramCache]: Analyzing trace with hash -673101525, now seen corresponding path program 1 times [2023-01-27 19:21:31,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:21:31,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285213562] [2023-01-27 19:21:31,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:21:31,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:21:31,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:21:31,292 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 19:21:31,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:21:31,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285213562] [2023-01-27 19:21:31,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285213562] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 19:21:31,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190591550] [2023-01-27 19:21:31,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:21:31,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:21:31,293 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 19:21:31,293 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 19:21:31,344 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 19:21:31,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:21:31,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 2 conjunts are in the unsatisfiable core [2023-01-27 19:21:31,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 19:21:31,393 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 19:21:31,393 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-01-27 19:21:31,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [190591550] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 19:21:31,393 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-01-27 19:21:31,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-01-27 19:21:31,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394296436] [2023-01-27 19:21:31,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 19:21:31,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 19:21:31,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:21:31,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 19:21:31,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-01-27 19:21:31,395 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 308 out of 682 [2023-01-27 19:21:31,395 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 19:21:31,395 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:21:31,396 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 308 of 682 [2023-01-27 19:21:31,396 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:22:09,186 INFO L130 PetriNetUnfolder]: 485132/667396 cut-off events. [2023-01-27 19:22:09,187 INFO L131 PetriNetUnfolder]: For 3923/3923 co-relation queries the response was YES. [2023-01-27 19:22:10,643 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 19:22:13,014 INFO L137 encePairwiseOnDemand]: 679/682 looper letters, 109 selfloop transitions, 2 changer transitions 0/133 dead transitions. [2023-01-27 19:22:13,014 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 133 transitions, 528 flow [2023-01-27 19:22:13,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 19:22:13,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 19:22:13,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1035 transitions. [2023-01-27 19:22:13,016 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5058651026392962 [2023-01-27 19:22:13,016 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1035 transitions. [2023-01-27 19:22:13,016 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1035 transitions. [2023-01-27 19:22:13,017 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:22:13,017 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1035 transitions. [2023-01-27 19:22:13,018 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 19:22:13,020 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 19:22:13,020 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 19:22:13,020 INFO L175 Difference]: Start difference. First operand has 111 places, 115 transitions, 270 flow. Second operand 3 states and 1035 transitions. [2023-01-27 19:22:13,020 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 133 transitions, 528 flow [2023-01-27 19:22:13,023 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 19:22:13,024 INFO L231 Difference]: Finished difference. Result has 113 places, 116 transitions, 278 flow [2023-01-27 19:22:13,024 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 19:22:13,024 INFO L281 CegarLoopForPetriNet]: 108 programPoint places, 5 predicate places. [2023-01-27 19:22:13,025 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 116 transitions, 278 flow [2023-01-27 19:22:13,025 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 19:22:13,025 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:22:13,025 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 19:22:13,033 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-01-27 19:22:13,229 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 19:22:13,229 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 19:22:13,229 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:22:13,229 INFO L85 PathProgramCache]: Analyzing trace with hash -751777354, now seen corresponding path program 1 times [2023-01-27 19:22:13,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:22:13,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726897547] [2023-01-27 19:22:13,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:22:13,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:22:13,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:22:13,257 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 19:22:13,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:22:13,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726897547] [2023-01-27 19:22:13,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726897547] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 19:22:13,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747574957] [2023-01-27 19:22:13,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:22:13,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:22:13,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 19:22:13,260 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 19:22:13,262 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 19:22:13,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:22:13,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 3 conjunts are in the unsatisfiable core [2023-01-27 19:22:13,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 19:22:13,342 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 19:22:13,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 19:22:13,352 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 19:22:13,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1747574957] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 19:22:13,353 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 19:22:13,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-01-27 19:22:13,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851299854] [2023-01-27 19:22:13,353 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 19:22:13,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-01-27 19:22:13,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:22:13,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-01-27 19:22:13,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-01-27 19:22:13,357 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 308 out of 682 [2023-01-27 19:22:13,358 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 19:22:13,358 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:22:13,358 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 308 of 682 [2023-01-27 19:22:13,358 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand