/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 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/mult-comm.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-b8dbc81 [2023-01-28 09:28:57,638 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-01-28 09:28:57,640 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-01-28 09:28:57,669 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-01-28 09:28:57,669 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-01-28 09:28:57,670 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-01-28 09:28:57,671 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-01-28 09:28:57,672 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-01-28 09:28:57,673 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-01-28 09:28:57,674 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-01-28 09:28:57,675 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-01-28 09:28:57,676 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-01-28 09:28:57,676 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-01-28 09:28:57,677 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-01-28 09:28:57,678 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-01-28 09:28:57,679 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-01-28 09:28:57,679 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-01-28 09:28:57,680 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-01-28 09:28:57,681 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-01-28 09:28:57,682 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-01-28 09:28:57,683 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-01-28 09:28:57,684 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-01-28 09:28:57,685 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-01-28 09:28:57,686 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-01-28 09:28:57,688 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-01-28 09:28:57,689 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-01-28 09:28:57,689 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-01-28 09:28:57,690 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-01-28 09:28:57,690 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-01-28 09:28:57,691 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-01-28 09:28:57,691 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-01-28 09:28:57,691 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-01-28 09:28:57,692 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-01-28 09:28:57,693 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-01-28 09:28:57,693 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-01-28 09:28:57,693 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-01-28 09:28:57,694 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-01-28 09:28:57,694 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-01-28 09:28:57,694 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-01-28 09:28:57,695 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-01-28 09:28:57,699 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-01-28 09:28:57,701 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 [2023-01-28 09:28:57,724 INFO L113 SettingsManager]: Loading preferences was successful [2023-01-28 09:28:57,724 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-01-28 09:28:57,725 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-01-28 09:28:57,725 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-01-28 09:28:57,725 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-01-28 09:28:57,725 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-01-28 09:28:57,725 INFO L138 SettingsManager]: * Use SBE=true [2023-01-28 09:28:57,726 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-01-28 09:28:57,726 INFO L138 SettingsManager]: * sizeof long=4 [2023-01-28 09:28:57,726 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-01-28 09:28:57,726 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-01-28 09:28:57,726 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-01-28 09:28:57,726 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-01-28 09:28:57,726 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-01-28 09:28:57,726 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-01-28 09:28:57,727 INFO L138 SettingsManager]: * sizeof long double=12 [2023-01-28 09:28:57,727 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-01-28 09:28:57,727 INFO L138 SettingsManager]: * Use constant arrays=true [2023-01-28 09:28:57,727 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-01-28 09:28:57,727 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-01-28 09:28:57,727 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-01-28 09:28:57,727 INFO L138 SettingsManager]: * To the following directory=./dump/ [2023-01-28 09:28:57,727 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-01-28 09:28:57,727 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-28 09:28:57,728 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-01-28 09:28:57,728 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-01-28 09:28:57,728 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-01-28 09:28:57,728 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-01-28 09:28:57,728 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-01-28 09:28:57,728 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-01-28 09:28:57,728 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-01-28 09:28:57,728 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-01-28 09:28:57,931 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-01-28 09:28:57,956 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-01-28 09:28:57,958 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-01-28 09:28:57,958 INFO L271 PluginConnector]: Initializing CDTParser... [2023-01-28 09:28:57,961 INFO L275 PluginConnector]: CDTParser initialized [2023-01-28 09:28:57,961 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/mult-comm.wvr.c [2023-01-28 09:28:59,101 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-01-28 09:28:59,276 INFO L351 CDTParser]: Found 1 translation units. [2023-01-28 09:28:59,276 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/mult-comm.wvr.c [2023-01-28 09:28:59,282 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8c2277010/20ca7a5648fb4d2bbf8a589b7464efb6/FLAGdb0f4213c [2023-01-28 09:28:59,293 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8c2277010/20ca7a5648fb4d2bbf8a589b7464efb6 [2023-01-28 09:28:59,295 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-01-28 09:28:59,296 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2023-01-28 09:28:59,297 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-01-28 09:28:59,297 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-01-28 09:28:59,300 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-01-28 09:28:59,300 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.01 09:28:59" (1/1) ... [2023-01-28 09:28:59,301 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@59b149b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 09:28:59, skipping insertion in model container [2023-01-28 09:28:59,301 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.01 09:28:59" (1/1) ... [2023-01-28 09:28:59,307 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-01-28 09:28:59,320 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-01-28 09:28:59,481 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/mult-comm.wvr.c[1910,1923] [2023-01-28 09:28:59,484 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-28 09:28:59,491 INFO L203 MainTranslator]: Completed pre-run [2023-01-28 09:28:59,506 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/mult-comm.wvr.c[1910,1923] [2023-01-28 09:28:59,506 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-28 09:28:59,518 INFO L208 MainTranslator]: Completed translation [2023-01-28 09:28:59,518 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 09:28:59 WrapperNode [2023-01-28 09:28:59,518 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-01-28 09:28:59,519 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-01-28 09:28:59,520 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-01-28 09:28:59,520 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-01-28 09:28:59,525 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 09:28:59" (1/1) ... [2023-01-28 09:28:59,530 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 09:28:59" (1/1) ... [2023-01-28 09:28:59,544 INFO L138 Inliner]: procedures = 21, calls = 19, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 54 [2023-01-28 09:28:59,544 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-01-28 09:28:59,545 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-01-28 09:28:59,545 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-01-28 09:28:59,545 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-01-28 09:28:59,552 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 09:28:59" (1/1) ... [2023-01-28 09:28:59,552 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 09:28:59" (1/1) ... [2023-01-28 09:28:59,561 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 09:28:59" (1/1) ... [2023-01-28 09:28:59,561 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 09:28:59" (1/1) ... [2023-01-28 09:28:59,564 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 09:28:59" (1/1) ... [2023-01-28 09:28:59,566 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 09:28:59" (1/1) ... [2023-01-28 09:28:59,567 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 09:28:59" (1/1) ... [2023-01-28 09:28:59,568 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 09:28:59" (1/1) ... [2023-01-28 09:28:59,569 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-01-28 09:28:59,570 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-01-28 09:28:59,570 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-01-28 09:28:59,570 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-01-28 09:28:59,571 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 09:28:59" (1/1) ... [2023-01-28 09:28:59,576 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-28 09:28:59,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 09:28:59,598 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) [2023-01-28 09:28:59,601 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 [2023-01-28 09:28:59,632 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-01-28 09:28:59,632 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-01-28 09:28:59,632 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-01-28 09:28:59,632 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-01-28 09:28:59,632 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-01-28 09:28:59,632 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-01-28 09:28:59,632 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-01-28 09:28:59,632 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-01-28 09:28:59,633 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-01-28 09:28:59,633 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-01-28 09:28:59,633 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-01-28 09:28:59,633 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-01-28 09:28:59,634 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-01-28 09:28:59,741 INFO L236 CfgBuilder]: Building ICFG [2023-01-28 09:28:59,743 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-01-28 09:28:59,928 INFO L277 CfgBuilder]: Performing block encoding [2023-01-28 09:28:59,949 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-01-28 09:28:59,949 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-01-28 09:28:59,951 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 09:28:59 BoogieIcfgContainer [2023-01-28 09:28:59,951 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-01-28 09:28:59,953 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-01-28 09:28:59,953 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-01-28 09:28:59,956 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-01-28 09:28:59,956 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.01 09:28:59" (1/3) ... [2023-01-28 09:28:59,956 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f67008b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.01 09:28:59, skipping insertion in model container [2023-01-28 09:28:59,956 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 09:28:59" (2/3) ... [2023-01-28 09:28:59,957 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f67008b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.01 09:28:59, skipping insertion in model container [2023-01-28 09:28:59,957 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 09:28:59" (3/3) ... [2023-01-28 09:28:59,958 INFO L112 eAbstractionObserver]: Analyzing ICFG mult-comm.wvr.c [2023-01-28 09:28:59,976 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-01-28 09:28:59,976 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-01-28 09:28:59,976 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-01-28 09:29:00,040 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-01-28 09:29:00,069 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 79 places, 77 transitions, 170 flow [2023-01-28 09:29:00,109 INFO L130 PetriNetUnfolder]: 5/75 cut-off events. [2023-01-28 09:29:00,110 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-28 09:29:00,113 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84 conditions, 75 events. 5/75 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 44 event pairs, 0 based on Foata normal form. 0/69 useless extension candidates. Maximal degree in co-relation 42. Up to 2 conditions per place. [2023-01-28 09:29:00,114 INFO L82 GeneralOperation]: Start removeDead. Operand has 79 places, 77 transitions, 170 flow [2023-01-28 09:29:00,120 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 69 places, 67 transitions, 146 flow [2023-01-28 09:29:00,123 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 09:29:00,132 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 69 places, 67 transitions, 146 flow [2023-01-28 09:29:00,134 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 69 places, 67 transitions, 146 flow [2023-01-28 09:29:00,134 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 69 places, 67 transitions, 146 flow [2023-01-28 09:29:00,206 INFO L130 PetriNetUnfolder]: 5/67 cut-off events. [2023-01-28 09:29:00,206 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-28 09:29:00,207 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76 conditions, 67 events. 5/67 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 43 event pairs, 0 based on Foata normal form. 0/62 useless extension candidates. Maximal degree in co-relation 42. Up to 2 conditions per place. [2023-01-28 09:29:00,208 INFO L119 LiptonReduction]: Number of co-enabled transitions 500 [2023-01-28 09:29:01,886 INFO L134 LiptonReduction]: Checked pairs total: 509 [2023-01-28 09:29:01,887 INFO L136 LiptonReduction]: Total number of compositions: 59 [2023-01-28 09:29:01,912 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-28 09:29:01,919 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;@199528e8, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 09:29:01,919 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-01-28 09:29:01,927 INFO L130 PetriNetUnfolder]: 2/14 cut-off events. [2023-01-28 09:29:01,927 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-28 09:29:01,928 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 09:29:01,928 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 09:29:01,929 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 09:29:01,933 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 09:29:01,933 INFO L85 PathProgramCache]: Analyzing trace with hash -1543000620, now seen corresponding path program 1 times [2023-01-28 09:29:01,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 09:29:01,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599589537] [2023-01-28 09:29:01,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:29:01,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 09:29:02,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:29:02,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:29:02,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 09:29:02,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599589537] [2023-01-28 09:29:02,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599589537] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 09:29:02,450 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 09:29:02,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-01-28 09:29:02,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064139822] [2023-01-28 09:29:02,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 09:29:02,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 09:29:02,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 09:29:02,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 09:29:02,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-28 09:29:02,479 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 136 [2023-01-28 09:29:02,481 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 15 transitions, 42 flow. Second operand has 3 states, 3 states have (on average 67.66666666666667) internal successors, (203), 3 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:29:02,481 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 09:29:02,481 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 136 [2023-01-28 09:29:02,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 09:29:02,542 INFO L130 PetriNetUnfolder]: 65/114 cut-off events. [2023-01-28 09:29:02,542 INFO L131 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2023-01-28 09:29:02,543 INFO L83 FinitePrefix]: Finished finitePrefix Result has 246 conditions, 114 events. 65/114 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 325 event pairs, 9 based on Foata normal form. 1/74 useless extension candidates. Maximal degree in co-relation 179. Up to 85 conditions per place. [2023-01-28 09:29:02,546 INFO L137 encePairwiseOnDemand]: 132/136 looper letters, 19 selfloop transitions, 3 changer transitions 1/25 dead transitions. [2023-01-28 09:29:02,546 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 25 transitions, 117 flow [2023-01-28 09:29:02,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-28 09:29:02,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-28 09:29:02,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 216 transitions. [2023-01-28 09:29:02,559 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5294117647058824 [2023-01-28 09:29:02,559 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 216 transitions. [2023-01-28 09:29:02,559 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 216 transitions. [2023-01-28 09:29:02,561 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 09:29:02,562 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 216 transitions. [2023-01-28 09:29:02,566 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 72.0) internal successors, (216), 3 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:29:02,570 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 136.0) internal successors, (544), 4 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:29:02,570 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 136.0) internal successors, (544), 4 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:29:02,571 INFO L175 Difference]: Start difference. First operand has 20 places, 15 transitions, 42 flow. Second operand 3 states and 216 transitions. [2023-01-28 09:29:02,572 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 25 transitions, 117 flow [2023-01-28 09:29:02,574 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 18 places, 25 transitions, 103 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-01-28 09:29:02,575 INFO L231 Difference]: Finished difference. Result has 19 places, 17 transitions, 53 flow [2023-01-28 09:29:02,576 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=34, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=53, PETRI_PLACES=19, PETRI_TRANSITIONS=17} [2023-01-28 09:29:02,581 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, -1 predicate places. [2023-01-28 09:29:02,581 INFO L495 AbstractCegarLoop]: Abstraction has has 19 places, 17 transitions, 53 flow [2023-01-28 09:29:02,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 67.66666666666667) internal successors, (203), 3 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:29:02,581 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 09:29:02,581 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 09:29:02,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-01-28 09:29:02,582 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 09:29:02,582 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 09:29:02,582 INFO L85 PathProgramCache]: Analyzing trace with hash 1815553743, now seen corresponding path program 1 times [2023-01-28 09:29:02,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 09:29:02,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135751520] [2023-01-28 09:29:02,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:29:02,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 09:29:02,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:29:02,850 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:29:02,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 09:29:02,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135751520] [2023-01-28 09:29:02,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135751520] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 09:29:02,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748405782] [2023-01-28 09:29:02,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:29:02,878 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:29:02,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 09:29:02,881 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) [2023-01-28 09:29:02,883 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-01-28 09:29:02,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:29:02,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 16 conjunts are in the unsatisfiable core [2023-01-28 09:29:02,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 09:29:03,132 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:29:03,132 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 09:29:03,371 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:29:03,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1748405782] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 09:29:03,372 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 09:29:03,372 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 3] total 7 [2023-01-28 09:29:03,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403254404] [2023-01-28 09:29:03,373 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 09:29:03,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-01-28 09:29:03,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 09:29:03,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-01-28 09:29:03,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-01-28 09:29:03,376 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 136 [2023-01-28 09:29:03,376 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 19 places, 17 transitions, 53 flow. Second operand has 9 states, 9 states have (on average 59.888888888888886) internal successors, (539), 9 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:29:03,377 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 09:29:03,377 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 136 [2023-01-28 09:29:03,377 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 09:29:03,561 INFO L130 PetriNetUnfolder]: 75/137 cut-off events. [2023-01-28 09:29:03,562 INFO L131 PetriNetUnfolder]: For 20/20 co-relation queries the response was YES. [2023-01-28 09:29:03,562 INFO L83 FinitePrefix]: Finished finitePrefix Result has 339 conditions, 137 events. 75/137 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 431 event pairs, 1 based on Foata normal form. 1/136 useless extension candidates. Maximal degree in co-relation 84. Up to 79 conditions per place. [2023-01-28 09:29:03,563 INFO L137 encePairwiseOnDemand]: 130/136 looper letters, 21 selfloop transitions, 5 changer transitions 15/42 dead transitions. [2023-01-28 09:29:03,563 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 42 transitions, 200 flow [2023-01-28 09:29:03,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-28 09:29:03,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-28 09:29:03,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 384 transitions. [2023-01-28 09:29:03,567 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47058823529411764 [2023-01-28 09:29:03,567 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 384 transitions. [2023-01-28 09:29:03,567 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 384 transitions. [2023-01-28 09:29:03,567 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 09:29:03,567 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 384 transitions. [2023-01-28 09:29:03,568 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 64.0) internal successors, (384), 6 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:29:03,570 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 136.0) internal successors, (952), 7 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:29:03,571 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 136.0) internal successors, (952), 7 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:29:03,571 INFO L175 Difference]: Start difference. First operand has 19 places, 17 transitions, 53 flow. Second operand 6 states and 384 transitions. [2023-01-28 09:29:03,571 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 42 transitions, 200 flow [2023-01-28 09:29:03,572 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 42 transitions, 195 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-01-28 09:29:03,572 INFO L231 Difference]: Finished difference. Result has 26 places, 19 transitions, 78 flow [2023-01-28 09:29:03,572 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=78, PETRI_PLACES=26, PETRI_TRANSITIONS=19} [2023-01-28 09:29:03,573 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 6 predicate places. [2023-01-28 09:29:03,573 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 19 transitions, 78 flow [2023-01-28 09:29:03,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 59.888888888888886) internal successors, (539), 9 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:29:03,574 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 09:29:03,574 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 09:29:03,586 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-01-28 09:29:03,789 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 [2023-01-28 09:29:03,790 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 09:29:03,790 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 09:29:03,790 INFO L85 PathProgramCache]: Analyzing trace with hash 1901148465, now seen corresponding path program 1 times [2023-01-28 09:29:03,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 09:29:03,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92895279] [2023-01-28 09:29:03,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:29:03,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 09:29:03,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:29:03,987 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:29:03,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 09:29:03,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92895279] [2023-01-28 09:29:03,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92895279] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 09:29:03,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084640643] [2023-01-28 09:29:03,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:29:03,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:29:03,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 09:29:03,991 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) [2023-01-28 09:29:04,005 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-01-28 09:29:04,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:29:04,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 14 conjunts are in the unsatisfiable core [2023-01-28 09:29:04,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 09:29:04,112 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:29:04,113 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 09:29:04,450 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:29:04,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1084640643] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 09:29:04,451 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 09:29:04,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 3] total 7 [2023-01-28 09:29:04,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259880346] [2023-01-28 09:29:04,451 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 09:29:04,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-01-28 09:29:04,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 09:29:04,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-01-28 09:29:04,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-01-28 09:29:04,453 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 136 [2023-01-28 09:29:04,454 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 19 transitions, 78 flow. Second operand has 9 states, 9 states have (on average 59.888888888888886) internal successors, (539), 9 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:29:04,454 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 09:29:04,454 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 136 [2023-01-28 09:29:04,454 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 09:29:04,644 INFO L130 PetriNetUnfolder]: 48/93 cut-off events. [2023-01-28 09:29:04,644 INFO L131 PetriNetUnfolder]: For 39/45 co-relation queries the response was YES. [2023-01-28 09:29:04,645 INFO L83 FinitePrefix]: Finished finitePrefix Result has 266 conditions, 93 events. 48/93 cut-off events. For 39/45 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 201 event pairs, 8 based on Foata normal form. 7/99 useless extension candidates. Maximal degree in co-relation 255. Up to 69 conditions per place. [2023-01-28 09:29:04,645 INFO L137 encePairwiseOnDemand]: 130/136 looper letters, 17 selfloop transitions, 6 changer transitions 9/34 dead transitions. [2023-01-28 09:29:04,645 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 34 transitions, 189 flow [2023-01-28 09:29:04,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-28 09:29:04,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-28 09:29:04,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 374 transitions. [2023-01-28 09:29:04,647 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2023-01-28 09:29:04,647 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 374 transitions. [2023-01-28 09:29:04,647 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 374 transitions. [2023-01-28 09:29:04,648 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 09:29:04,648 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 374 transitions. [2023-01-28 09:29:04,649 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 62.333333333333336) internal successors, (374), 6 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:29:04,650 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 136.0) internal successors, (952), 7 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:29:04,650 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 136.0) internal successors, (952), 7 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:29:04,651 INFO L175 Difference]: Start difference. First operand has 26 places, 19 transitions, 78 flow. Second operand 6 states and 374 transitions. [2023-01-28 09:29:04,651 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 34 transitions, 189 flow [2023-01-28 09:29:04,651 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 34 transitions, 167 flow, removed 5 selfloop flow, removed 3 redundant places. [2023-01-28 09:29:04,652 INFO L231 Difference]: Finished difference. Result has 29 places, 21 transitions, 94 flow [2023-01-28 09:29:04,652 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=94, PETRI_PLACES=29, PETRI_TRANSITIONS=21} [2023-01-28 09:29:04,652 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 9 predicate places. [2023-01-28 09:29:04,653 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 21 transitions, 94 flow [2023-01-28 09:29:04,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 59.888888888888886) internal successors, (539), 9 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:29:04,653 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 09:29:04,653 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 09:29:04,660 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-01-28 09:29:04,858 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 [2023-01-28 09:29:04,858 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 09:29:04,859 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 09:29:04,859 INFO L85 PathProgramCache]: Analyzing trace with hash -1653348717, now seen corresponding path program 2 times [2023-01-28 09:29:04,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 09:29:04,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304340474] [2023-01-28 09:29:04,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:29:04,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 09:29:04,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:29:05,006 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:29:05,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 09:29:05,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304340474] [2023-01-28 09:29:05,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304340474] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 09:29:05,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052274539] [2023-01-28 09:29:05,007 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 09:29:05,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:29:05,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 09:29:05,008 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) [2023-01-28 09:29:05,010 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-01-28 09:29:05,052 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 09:29:05,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 09:29:05,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 18 conjunts are in the unsatisfiable core [2023-01-28 09:29:05,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 09:29:05,148 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:29:05,148 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 09:29:05,344 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:29:05,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2052274539] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 09:29:05,344 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 09:29:05,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 4] total 12 [2023-01-28 09:29:05,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103622625] [2023-01-28 09:29:05,344 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 09:29:05,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-01-28 09:29:05,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 09:29:05,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-01-28 09:29:05,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2023-01-28 09:29:05,346 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 136 [2023-01-28 09:29:05,347 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 21 transitions, 94 flow. Second operand has 14 states, 14 states have (on average 52.42857142857143) internal successors, (734), 14 states have internal predecessors, (734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:29:05,347 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 09:29:05,347 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 136 [2023-01-28 09:29:05,347 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 09:29:05,585 INFO L130 PetriNetUnfolder]: 113/211 cut-off events. [2023-01-28 09:29:05,586 INFO L131 PetriNetUnfolder]: For 86/86 co-relation queries the response was YES. [2023-01-28 09:29:05,588 INFO L83 FinitePrefix]: Finished finitePrefix Result has 616 conditions, 211 events. 113/211 cut-off events. For 86/86 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 674 event pairs, 9 based on Foata normal form. 3/214 useless extension candidates. Maximal degree in co-relation 601. Up to 92 conditions per place. [2023-01-28 09:29:05,591 INFO L137 encePairwiseOnDemand]: 129/136 looper letters, 41 selfloop transitions, 19 changer transitions 12/72 dead transitions. [2023-01-28 09:29:05,591 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 72 transitions, 397 flow [2023-01-28 09:29:05,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-01-28 09:29:05,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-01-28 09:29:05,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 624 transitions. [2023-01-28 09:29:05,593 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41711229946524064 [2023-01-28 09:29:05,593 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 624 transitions. [2023-01-28 09:29:05,594 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 624 transitions. [2023-01-28 09:29:05,594 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 09:29:05,594 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 624 transitions. [2023-01-28 09:29:05,596 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 56.72727272727273) internal successors, (624), 11 states have internal predecessors, (624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:29:05,598 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 136.0) internal successors, (1632), 12 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:29:05,599 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 136.0) internal successors, (1632), 12 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:29:05,599 INFO L175 Difference]: Start difference. First operand has 29 places, 21 transitions, 94 flow. Second operand 11 states and 624 transitions. [2023-01-28 09:29:05,599 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 72 transitions, 397 flow [2023-01-28 09:29:05,603 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 72 transitions, 384 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-01-28 09:29:05,604 INFO L231 Difference]: Finished difference. Result has 40 places, 33 transitions, 198 flow [2023-01-28 09:29:05,604 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=83, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=198, PETRI_PLACES=40, PETRI_TRANSITIONS=33} [2023-01-28 09:29:05,606 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 20 predicate places. [2023-01-28 09:29:05,606 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 33 transitions, 198 flow [2023-01-28 09:29:05,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.42857142857143) internal successors, (734), 14 states have internal predecessors, (734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:29:05,607 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 09:29:05,607 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 09:29:05,627 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-01-28 09:29:05,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:29:05,813 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 09:29:05,814 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 09:29:05,814 INFO L85 PathProgramCache]: Analyzing trace with hash -73524693, now seen corresponding path program 3 times [2023-01-28 09:29:05,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 09:29:05,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110725234] [2023-01-28 09:29:05,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:29:05,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 09:29:05,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:29:06,034 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:29:06,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 09:29:06,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110725234] [2023-01-28 09:29:06,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110725234] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 09:29:06,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775278041] [2023-01-28 09:29:06,035 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 09:29:06,035 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:29:06,035 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 09:29:06,059 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) [2023-01-28 09:29:06,060 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-01-28 09:29:06,104 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-28 09:29:06,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 09:29:06,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 18 conjunts are in the unsatisfiable core [2023-01-28 09:29:06,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 09:29:06,199 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:29:06,199 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 09:29:06,386 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:29:06,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [775278041] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 09:29:06,386 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 09:29:06,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 4] total 11 [2023-01-28 09:29:06,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510142794] [2023-01-28 09:29:06,386 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 09:29:06,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-01-28 09:29:06,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 09:29:06,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-01-28 09:29:06,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2023-01-28 09:29:06,388 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 136 [2023-01-28 09:29:06,388 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 33 transitions, 198 flow. Second operand has 13 states, 13 states have (on average 52.46153846153846) internal successors, (682), 13 states have internal predecessors, (682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:29:06,388 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 09:29:06,389 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 136 [2023-01-28 09:29:06,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 09:29:06,681 INFO L130 PetriNetUnfolder]: 136/263 cut-off events. [2023-01-28 09:29:06,682 INFO L131 PetriNetUnfolder]: For 361/361 co-relation queries the response was YES. [2023-01-28 09:29:06,682 INFO L83 FinitePrefix]: Finished finitePrefix Result has 935 conditions, 263 events. 136/263 cut-off events. For 361/361 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 928 event pairs, 23 based on Foata normal form. 3/262 useless extension candidates. Maximal degree in co-relation 876. Up to 180 conditions per place. [2023-01-28 09:29:06,683 INFO L137 encePairwiseOnDemand]: 129/136 looper letters, 44 selfloop transitions, 18 changer transitions 12/74 dead transitions. [2023-01-28 09:29:06,683 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 74 transitions, 506 flow [2023-01-28 09:29:06,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-01-28 09:29:06,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-01-28 09:29:06,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 565 transitions. [2023-01-28 09:29:06,685 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41544117647058826 [2023-01-28 09:29:06,685 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 565 transitions. [2023-01-28 09:29:06,685 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 565 transitions. [2023-01-28 09:29:06,686 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 09:29:06,686 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 565 transitions. [2023-01-28 09:29:06,687 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 56.5) internal successors, (565), 10 states have internal predecessors, (565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:29:06,688 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 136.0) internal successors, (1496), 11 states have internal predecessors, (1496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:29:06,688 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 136.0) internal successors, (1496), 11 states have internal predecessors, (1496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:29:06,688 INFO L175 Difference]: Start difference. First operand has 40 places, 33 transitions, 198 flow. Second operand 10 states and 565 transitions. [2023-01-28 09:29:06,688 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 74 transitions, 506 flow [2023-01-28 09:29:06,690 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 74 transitions, 438 flow, removed 23 selfloop flow, removed 5 redundant places. [2023-01-28 09:29:06,691 INFO L231 Difference]: Finished difference. Result has 49 places, 44 transitions, 272 flow [2023-01-28 09:29:06,692 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=272, PETRI_PLACES=49, PETRI_TRANSITIONS=44} [2023-01-28 09:29:06,692 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 29 predicate places. [2023-01-28 09:29:06,692 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 44 transitions, 272 flow [2023-01-28 09:29:06,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 52.46153846153846) internal successors, (682), 13 states have internal predecessors, (682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:29:06,692 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 09:29:06,693 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 09:29:06,709 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-01-28 09:29:06,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:29:06,898 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 09:29:06,898 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 09:29:06,898 INFO L85 PathProgramCache]: Analyzing trace with hash -2058058253, now seen corresponding path program 2 times [2023-01-28 09:29:06,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 09:29:06,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512528987] [2023-01-28 09:29:06,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:29:06,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 09:29:06,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:29:07,071 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:29:07,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 09:29:07,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512528987] [2023-01-28 09:29:07,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512528987] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 09:29:07,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592747848] [2023-01-28 09:29:07,072 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 09:29:07,072 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:29:07,072 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 09:29:07,073 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) [2023-01-28 09:29:07,075 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-01-28 09:29:07,117 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 09:29:07,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 09:29:07,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 14 conjunts are in the unsatisfiable core [2023-01-28 09:29:07,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 09:29:07,170 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:29:07,170 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 09:29:07,614 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:29:07,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [592747848] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 09:29:07,615 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 09:29:07,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 3] total 8 [2023-01-28 09:29:07,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490781211] [2023-01-28 09:29:07,615 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 09:29:07,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-01-28 09:29:07,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 09:29:07,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-01-28 09:29:07,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2023-01-28 09:29:07,617 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 136 [2023-01-28 09:29:07,617 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 44 transitions, 272 flow. Second operand has 10 states, 10 states have (on average 59.8) internal successors, (598), 10 states have internal predecessors, (598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:29:07,617 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 09:29:07,617 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 136 [2023-01-28 09:29:07,617 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 09:29:08,001 INFO L130 PetriNetUnfolder]: 166/329 cut-off events. [2023-01-28 09:29:08,001 INFO L131 PetriNetUnfolder]: For 677/687 co-relation queries the response was YES. [2023-01-28 09:29:08,002 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1193 conditions, 329 events. 166/329 cut-off events. For 677/687 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1360 event pairs, 22 based on Foata normal form. 9/324 useless extension candidates. Maximal degree in co-relation 1121. Up to 233 conditions per place. [2023-01-28 09:29:08,003 INFO L137 encePairwiseOnDemand]: 130/136 looper letters, 55 selfloop transitions, 18 changer transitions 6/82 dead transitions. [2023-01-28 09:29:08,003 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 82 transitions, 600 flow [2023-01-28 09:29:08,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-01-28 09:29:08,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-01-28 09:29:08,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 572 transitions. [2023-01-28 09:29:08,005 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4673202614379085 [2023-01-28 09:29:08,005 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 572 transitions. [2023-01-28 09:29:08,005 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 572 transitions. [2023-01-28 09:29:08,006 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 09:29:08,006 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 572 transitions. [2023-01-28 09:29:08,007 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 63.55555555555556) internal successors, (572), 9 states have internal predecessors, (572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:29:08,008 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 136.0) internal successors, (1360), 10 states have internal predecessors, (1360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:29:08,008 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 136.0) internal successors, (1360), 10 states have internal predecessors, (1360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:29:08,008 INFO L175 Difference]: Start difference. First operand has 49 places, 44 transitions, 272 flow. Second operand 9 states and 572 transitions. [2023-01-28 09:29:08,008 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 82 transitions, 600 flow [2023-01-28 09:29:08,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 82 transitions, 551 flow, removed 17 selfloop flow, removed 3 redundant places. [2023-01-28 09:29:08,012 INFO L231 Difference]: Finished difference. Result has 57 places, 53 transitions, 337 flow [2023-01-28 09:29:08,012 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=233, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=337, PETRI_PLACES=57, PETRI_TRANSITIONS=53} [2023-01-28 09:29:08,013 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 37 predicate places. [2023-01-28 09:29:08,013 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 53 transitions, 337 flow [2023-01-28 09:29:08,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 59.8) internal successors, (598), 10 states have internal predecessors, (598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:29:08,013 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 09:29:08,013 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 09:29:08,020 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-01-28 09:29:08,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:29:08,218 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 09:29:08,219 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 09:29:08,219 INFO L85 PathProgramCache]: Analyzing trace with hash 587325377, now seen corresponding path program 3 times [2023-01-28 09:29:08,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 09:29:08,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241110907] [2023-01-28 09:29:08,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:29:08,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 09:29:08,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:29:08,367 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:29:08,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 09:29:08,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241110907] [2023-01-28 09:29:08,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241110907] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 09:29:08,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307258188] [2023-01-28 09:29:08,368 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 09:29:08,368 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:29:08,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 09:29:08,369 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) [2023-01-28 09:29:08,371 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-01-28 09:29:08,412 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-28 09:29:08,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 09:29:08,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 14 conjunts are in the unsatisfiable core [2023-01-28 09:29:08,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 09:29:08,462 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:29:08,462 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 09:29:08,590 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:29:08,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [307258188] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 09:29:08,591 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 09:29:08,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 3] total 9 [2023-01-28 09:29:08,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998801517] [2023-01-28 09:29:08,591 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 09:29:08,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-01-28 09:29:08,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 09:29:08,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-01-28 09:29:08,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2023-01-28 09:29:08,592 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 136 [2023-01-28 09:29:08,593 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 53 transitions, 337 flow. Second operand has 11 states, 11 states have (on average 59.72727272727273) internal successors, (657), 11 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:29:08,593 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 09:29:08,593 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 136 [2023-01-28 09:29:08,593 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 09:29:08,710 INFO L130 PetriNetUnfolder]: 210/411 cut-off events. [2023-01-28 09:29:08,710 INFO L131 PetriNetUnfolder]: For 896/906 co-relation queries the response was YES. [2023-01-28 09:29:08,711 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1538 conditions, 411 events. 210/411 cut-off events. For 896/906 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 1804 event pairs, 42 based on Foata normal form. 9/405 useless extension candidates. Maximal degree in co-relation 1452. Up to 298 conditions per place. [2023-01-28 09:29:08,712 INFO L137 encePairwiseOnDemand]: 130/136 looper letters, 59 selfloop transitions, 22 changer transitions 7/91 dead transitions. [2023-01-28 09:29:08,712 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 91 transitions, 692 flow [2023-01-28 09:29:08,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-01-28 09:29:08,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-01-28 09:29:08,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 630 transitions. [2023-01-28 09:29:08,714 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4632352941176471 [2023-01-28 09:29:08,714 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 630 transitions. [2023-01-28 09:29:08,714 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 630 transitions. [2023-01-28 09:29:08,714 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 09:29:08,715 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 630 transitions. [2023-01-28 09:29:08,715 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 63.0) internal successors, (630), 10 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:29:08,717 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 136.0) internal successors, (1496), 11 states have internal predecessors, (1496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:29:08,717 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 136.0) internal successors, (1496), 11 states have internal predecessors, (1496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:29:08,717 INFO L175 Difference]: Start difference. First operand has 57 places, 53 transitions, 337 flow. Second operand 10 states and 630 transitions. [2023-01-28 09:29:08,717 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 91 transitions, 692 flow [2023-01-28 09:29:08,720 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 91 transitions, 638 flow, removed 18 selfloop flow, removed 3 redundant places. [2023-01-28 09:29:08,721 INFO L231 Difference]: Finished difference. Result has 66 places, 64 transitions, 425 flow [2023-01-28 09:29:08,721 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=287, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=425, PETRI_PLACES=66, PETRI_TRANSITIONS=64} [2023-01-28 09:29:08,722 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 46 predicate places. [2023-01-28 09:29:08,722 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 64 transitions, 425 flow [2023-01-28 09:29:08,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 59.72727272727273) internal successors, (657), 11 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:29:08,722 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 09:29:08,722 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 09:29:08,729 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-01-28 09:29:08,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:29:08,927 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 09:29:08,927 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 09:29:08,927 INFO L85 PathProgramCache]: Analyzing trace with hash -1884096032, now seen corresponding path program 1 times [2023-01-28 09:29:08,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 09:29:08,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967655661] [2023-01-28 09:29:08,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:29:08,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 09:29:08,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:29:09,385 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:29:09,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 09:29:09,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967655661] [2023-01-28 09:29:09,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967655661] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 09:29:09,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864262059] [2023-01-28 09:29:09,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:29:09,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:29:09,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 09:29:09,388 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) [2023-01-28 09:29:09,390 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-01-28 09:29:09,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:29:09,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 25 conjunts are in the unsatisfiable core [2023-01-28 09:29:09,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 09:29:09,624 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:29:09,625 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 09:29:37,707 WARN L222 SmtUtils]: Spent 25.14s on a formula simplification. DAG size of input: 1170 DAG size of output: 1127 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-01-28 09:32:08,526 WARN L222 SmtUtils]: Spent 5.61s on a formula simplification. DAG size of input: 689 DAG size of output: 658 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) Received shutdown request... [2023-01-28 09:43:37,986 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-01-28 09:43:37,986 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-01-28 09:43:38,997 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 [2023-01-28 09:43:38,998 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 Cannot interrupt operation gracefully because timeout expired. Forcing shutdown