/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 BEFORE -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_70-funloop_racefree.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-b8dbc81 [2023-01-28 01:51:01,862 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-01-28 01:51:01,863 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-01-28 01:51:01,902 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-01-28 01:51:01,902 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-01-28 01:51:01,905 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-01-28 01:51:01,907 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-01-28 01:51:01,909 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-01-28 01:51:01,910 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-01-28 01:51:01,912 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-01-28 01:51:01,913 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-01-28 01:51:01,914 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-01-28 01:51:01,914 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-01-28 01:51:01,915 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-01-28 01:51:01,916 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-01-28 01:51:01,917 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-01-28 01:51:01,917 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-01-28 01:51:01,918 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-01-28 01:51:01,920 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-01-28 01:51:01,925 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-01-28 01:51:01,927 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-01-28 01:51:01,928 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-01-28 01:51:01,930 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-01-28 01:51:01,931 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-01-28 01:51:01,936 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-01-28 01:51:01,937 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-01-28 01:51:01,937 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-01-28 01:51:01,937 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-01-28 01:51:01,938 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-01-28 01:51:01,938 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-01-28 01:51:01,939 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-01-28 01:51:01,939 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-01-28 01:51:01,940 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-01-28 01:51:01,940 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-01-28 01:51:01,941 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-01-28 01:51:01,941 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-01-28 01:51:01,941 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-01-28 01:51:01,942 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-01-28 01:51:01,942 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-01-28 01:51:01,942 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-01-28 01:51:01,943 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-01-28 01:51:01,947 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 01:51:01,967 INFO L113 SettingsManager]: Loading preferences was successful [2023-01-28 01:51:01,967 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-01-28 01:51:01,968 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-01-28 01:51:01,969 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-01-28 01:51:01,970 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-01-28 01:51:01,970 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-01-28 01:51:01,970 INFO L138 SettingsManager]: * Use SBE=true [2023-01-28 01:51:01,970 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-01-28 01:51:01,970 INFO L138 SettingsManager]: * sizeof long=4 [2023-01-28 01:51:01,970 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-01-28 01:51:01,971 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-01-28 01:51:01,971 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-01-28 01:51:01,971 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-01-28 01:51:01,972 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-01-28 01:51:01,972 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-01-28 01:51:01,972 INFO L138 SettingsManager]: * sizeof long double=12 [2023-01-28 01:51:01,972 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-01-28 01:51:01,972 INFO L138 SettingsManager]: * Use constant arrays=true [2023-01-28 01:51:01,972 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-01-28 01:51:01,972 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-01-28 01:51:01,973 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-01-28 01:51:01,973 INFO L138 SettingsManager]: * To the following directory=./dump/ [2023-01-28 01:51:01,973 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-01-28 01:51:01,973 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-28 01:51:01,973 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-01-28 01:51:01,973 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-01-28 01:51:01,973 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-01-28 01:51:01,973 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-01-28 01:51:01,973 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-01-28 01:51:01,974 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-01-28 01:51:01,974 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-01-28 01:51:01,974 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-01-28 01:51:02,217 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-01-28 01:51:02,241 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-01-28 01:51:02,243 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-01-28 01:51:02,244 INFO L271 PluginConnector]: Initializing CDTParser... [2023-01-28 01:51:02,244 INFO L275 PluginConnector]: CDTParser initialized [2023-01-28 01:51:02,245 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_70-funloop_racefree.i [2023-01-28 01:51:03,349 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-01-28 01:51:03,620 INFO L351 CDTParser]: Found 1 translation units. [2023-01-28 01:51:03,621 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_70-funloop_racefree.i [2023-01-28 01:51:03,639 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9d5f4b0cf/0cc8e526e1ca45d2b1f77d5a98d89868/FLAG852bedd8d [2023-01-28 01:51:03,651 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9d5f4b0cf/0cc8e526e1ca45d2b1f77d5a98d89868 [2023-01-28 01:51:03,654 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-01-28 01:51:03,655 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2023-01-28 01:51:03,656 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-01-28 01:51:03,656 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-01-28 01:51:03,659 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-01-28 01:51:03,660 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.01 01:51:03" (1/1) ... [2023-01-28 01:51:03,660 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1981c53a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 01:51:03, skipping insertion in model container [2023-01-28 01:51:03,661 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.01 01:51:03" (1/1) ... [2023-01-28 01:51:03,667 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-01-28 01:51:03,709 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-01-28 01:51:04,023 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_70-funloop_racefree.i[41323,41336] [2023-01-28 01:51:04,051 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-28 01:51:04,070 INFO L203 MainTranslator]: Completed pre-run [2023-01-28 01:51:04,110 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_70-funloop_racefree.i[41323,41336] [2023-01-28 01:51:04,121 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-28 01:51:04,189 INFO L208 MainTranslator]: Completed translation [2023-01-28 01:51:04,189 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 01:51:04 WrapperNode [2023-01-28 01:51:04,189 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-01-28 01:51:04,190 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-01-28 01:51:04,190 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-01-28 01:51:04,190 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-01-28 01:51:04,194 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 01:51:04" (1/1) ... [2023-01-28 01:51:04,211 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 01:51:04" (1/1) ... [2023-01-28 01:51:04,232 INFO L138 Inliner]: procedures = 271, calls = 31, calls flagged for inlining = 5, calls inlined = 6, statements flattened = 195 [2023-01-28 01:51:04,232 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-01-28 01:51:04,233 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-01-28 01:51:04,233 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-01-28 01:51:04,233 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-01-28 01:51:04,240 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 01:51:04" (1/1) ... [2023-01-28 01:51:04,240 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 01:51:04" (1/1) ... [2023-01-28 01:51:04,244 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 01:51:04" (1/1) ... [2023-01-28 01:51:04,244 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 01:51:04" (1/1) ... [2023-01-28 01:51:04,251 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 01:51:04" (1/1) ... [2023-01-28 01:51:04,255 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 01:51:04" (1/1) ... [2023-01-28 01:51:04,257 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 01:51:04" (1/1) ... [2023-01-28 01:51:04,258 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 01:51:04" (1/1) ... [2023-01-28 01:51:04,260 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-01-28 01:51:04,261 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-01-28 01:51:04,261 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-01-28 01:51:04,261 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-01-28 01:51:04,262 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 01:51:04" (1/1) ... [2023-01-28 01:51:04,266 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-28 01:51:04,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 01:51:04,295 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 01:51:04,300 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 01:51:04,323 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-01-28 01:51:04,323 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-01-28 01:51:04,323 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-01-28 01:51:04,323 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-01-28 01:51:04,323 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-01-28 01:51:04,323 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-01-28 01:51:04,323 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-01-28 01:51:04,323 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-01-28 01:51:04,323 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-01-28 01:51:04,324 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-01-28 01:51:04,324 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-01-28 01:51:04,325 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 01:51:04,439 INFO L236 CfgBuilder]: Building ICFG [2023-01-28 01:51:04,440 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-01-28 01:51:04,689 INFO L277 CfgBuilder]: Performing block encoding [2023-01-28 01:51:04,710 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-01-28 01:51:04,710 INFO L302 CfgBuilder]: Removed 25 assume(true) statements. [2023-01-28 01:51:04,712 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 01:51:04 BoogieIcfgContainer [2023-01-28 01:51:04,712 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-01-28 01:51:04,714 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-01-28 01:51:04,714 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-01-28 01:51:04,716 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-01-28 01:51:04,717 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.01 01:51:03" (1/3) ... [2023-01-28 01:51:04,717 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3df04c41 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.01 01:51:04, skipping insertion in model container [2023-01-28 01:51:04,717 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 01:51:04" (2/3) ... [2023-01-28 01:51:04,717 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3df04c41 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.01 01:51:04, skipping insertion in model container [2023-01-28 01:51:04,717 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 01:51:04" (3/3) ... [2023-01-28 01:51:04,718 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_70-funloop_racefree.i [2023-01-28 01:51:04,743 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-01-28 01:51:04,743 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-01-28 01:51:04,743 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-01-28 01:51:04,826 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-01-28 01:51:04,853 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 162 places, 192 transitions, 392 flow [2023-01-28 01:51:04,940 INFO L130 PetriNetUnfolder]: 49/273 cut-off events. [2023-01-28 01:51:04,940 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-01-28 01:51:04,953 INFO L83 FinitePrefix]: Finished finitePrefix Result has 279 conditions, 273 events. 49/273 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 975 event pairs, 0 based on Foata normal form. 0/218 useless extension candidates. Maximal degree in co-relation 155. Up to 8 conditions per place. [2023-01-28 01:51:04,953 INFO L82 GeneralOperation]: Start removeDead. Operand has 162 places, 192 transitions, 392 flow [2023-01-28 01:51:04,959 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 158 places, 187 transitions, 379 flow [2023-01-28 01:51:04,962 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 01:51:04,980 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 158 places, 187 transitions, 379 flow [2023-01-28 01:51:04,982 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 158 places, 187 transitions, 379 flow [2023-01-28 01:51:04,983 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 158 places, 187 transitions, 379 flow [2023-01-28 01:51:05,036 INFO L130 PetriNetUnfolder]: 48/268 cut-off events. [2023-01-28 01:51:05,036 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 01:51:05,039 INFO L83 FinitePrefix]: Finished finitePrefix Result has 273 conditions, 268 events. 48/268 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 917 event pairs, 0 based on Foata normal form. 0/213 useless extension candidates. Maximal degree in co-relation 155. Up to 8 conditions per place. [2023-01-28 01:51:05,045 INFO L119 LiptonReduction]: Number of co-enabled transitions 12006 [2023-01-28 01:51:07,359 INFO L134 LiptonReduction]: Checked pairs total: 18220 [2023-01-28 01:51:07,359 INFO L136 LiptonReduction]: Total number of compositions: 150 [2023-01-28 01:51:07,375 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-01-28 01:51:07,380 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;@631865c5, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 01:51:07,380 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-01-28 01:51:07,384 INFO L130 PetriNetUnfolder]: 9/29 cut-off events. [2023-01-28 01:51:07,384 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 01:51:07,384 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 01:51:07,385 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2023-01-28 01:51:07,385 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 01:51:07,389 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 01:51:07,389 INFO L85 PathProgramCache]: Analyzing trace with hash -928907132, now seen corresponding path program 1 times [2023-01-28 01:51:07,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 01:51:07,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571370850] [2023-01-28 01:51:07,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 01:51:07,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 01:51:07,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 01:51:07,577 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 01:51:07,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 01:51:07,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571370850] [2023-01-28 01:51:07,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571370850] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 01:51:07,578 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 01:51:07,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-28 01:51:07,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014434109] [2023-01-28 01:51:07,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 01:51:07,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 01:51:07,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 01:51:07,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 01:51:07,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-28 01:51:07,612 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 342 [2023-01-28 01:51:07,617 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 70 transitions, 145 flow. Second operand has 3 states, 3 states have (on average 155.66666666666666) internal successors, (467), 3 states have internal predecessors, (467), 0 states have call successors, (0), 0 states 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 01:51:07,617 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 01:51:07,617 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 342 [2023-01-28 01:51:07,618 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 01:51:07,772 INFO L130 PetriNetUnfolder]: 380/772 cut-off events. [2023-01-28 01:51:07,772 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 01:51:07,775 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1486 conditions, 772 events. 380/772 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 3513 event pairs, 306 based on Foata normal form. 76/711 useless extension candidates. Maximal degree in co-relation 1428. Up to 707 conditions per place. [2023-01-28 01:51:07,777 INFO L137 encePairwiseOnDemand]: 316/342 looper letters, 24 selfloop transitions, 2 changer transitions 19/48 dead transitions. [2023-01-28 01:51:07,778 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 48 transitions, 185 flow [2023-01-28 01:51:07,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-28 01:51:07,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-28 01:51:07,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 528 transitions. [2023-01-28 01:51:07,796 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5146198830409356 [2023-01-28 01:51:07,797 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 528 transitions. [2023-01-28 01:51:07,797 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 528 transitions. [2023-01-28 01:51:07,800 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 01:51:07,802 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 528 transitions. [2023-01-28 01:51:07,807 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 176.0) internal successors, (528), 3 states have internal predecessors, (528), 0 states have call successors, (0), 0 states 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 01:51:07,812 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 342.0) internal successors, (1368), 4 states have internal predecessors, (1368), 0 states have call successors, (0), 0 states 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 01:51:07,813 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 342.0) internal successors, (1368), 4 states have internal predecessors, (1368), 0 states have call successors, (0), 0 states 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 01:51:07,815 INFO L175 Difference]: Start difference. First operand has 46 places, 70 transitions, 145 flow. Second operand 3 states and 528 transitions. [2023-01-28 01:51:07,815 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 48 transitions, 185 flow [2023-01-28 01:51:07,818 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 48 transitions, 185 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-01-28 01:51:07,819 INFO L231 Difference]: Finished difference. Result has 48 places, 29 transitions, 73 flow [2023-01-28 01:51:07,821 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=342, PETRI_DIFFERENCE_MINUEND_FLOW=99, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=73, PETRI_PLACES=48, PETRI_TRANSITIONS=29} [2023-01-28 01:51:07,824 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 2 predicate places. [2023-01-28 01:51:07,824 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 29 transitions, 73 flow [2023-01-28 01:51:07,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 155.66666666666666) internal successors, (467), 3 states have internal predecessors, (467), 0 states have call successors, (0), 0 states 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 01:51:07,825 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 01:51:07,825 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-01-28 01:51:07,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-01-28 01:51:07,826 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 01:51:07,826 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 01:51:07,826 INFO L85 PathProgramCache]: Analyzing trace with hash -1418114387, now seen corresponding path program 1 times [2023-01-28 01:51:07,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 01:51:07,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698300596] [2023-01-28 01:51:07,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 01:51:07,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 01:51:07,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 01:51:07,921 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 01:51:07,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 01:51:07,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698300596] [2023-01-28 01:51:07,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698300596] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 01:51:07,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58044031] [2023-01-28 01:51:07,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 01:51:07,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 01:51:07,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 01:51:07,925 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 01:51:07,941 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 01:51:08,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 01:51:08,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 3 conjunts are in the unsatisfiable core [2023-01-28 01:51:08,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 01:51:08,080 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 01:51:08,080 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 01:51:08,103 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 01:51:08,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [58044031] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 01:51:08,103 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 01:51:08,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-01-28 01:51:08,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239134239] [2023-01-28 01:51:08,104 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 01:51:08,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-01-28 01:51:08,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 01:51:08,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-01-28 01:51:08,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-01-28 01:51:08,107 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 342 [2023-01-28 01:51:08,108 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 29 transitions, 73 flow. Second operand has 7 states, 7 states have (on average 155.57142857142858) internal successors, (1089), 7 states have internal predecessors, (1089), 0 states have call successors, (0), 0 states 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 01:51:08,108 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 01:51:08,108 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 342 [2023-01-28 01:51:08,108 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 01:51:08,181 INFO L130 PetriNetUnfolder]: 60/146 cut-off events. [2023-01-28 01:51:08,181 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 01:51:08,182 INFO L83 FinitePrefix]: Finished finitePrefix Result has 299 conditions, 146 events. 60/146 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 398 event pairs, 51 based on Foata normal form. 0/114 useless extension candidates. Maximal degree in co-relation 287. Up to 133 conditions per place. [2023-01-28 01:51:08,183 INFO L137 encePairwiseOnDemand]: 339/342 looper letters, 24 selfloop transitions, 5 changer transitions 0/32 dead transitions. [2023-01-28 01:51:08,183 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 32 transitions, 143 flow [2023-01-28 01:51:08,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-28 01:51:08,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-28 01:51:08,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 956 transitions. [2023-01-28 01:51:08,186 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46588693957115007 [2023-01-28 01:51:08,186 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 956 transitions. [2023-01-28 01:51:08,186 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 956 transitions. [2023-01-28 01:51:08,186 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 01:51:08,187 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 956 transitions. [2023-01-28 01:51:08,189 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 159.33333333333334) internal successors, (956), 6 states have internal predecessors, (956), 0 states have call successors, (0), 0 states 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 01:51:08,192 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 342.0) internal successors, (2394), 7 states have internal predecessors, (2394), 0 states have call successors, (0), 0 states 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 01:51:08,193 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 342.0) internal successors, (2394), 7 states have internal predecessors, (2394), 0 states have call successors, (0), 0 states 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 01:51:08,193 INFO L175 Difference]: Start difference. First operand has 48 places, 29 transitions, 73 flow. Second operand 6 states and 956 transitions. [2023-01-28 01:51:08,194 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 32 transitions, 143 flow [2023-01-28 01:51:08,194 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 32 transitions, 139 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-01-28 01:51:08,196 INFO L231 Difference]: Finished difference. Result has 38 places, 32 transitions, 105 flow [2023-01-28 01:51:08,196 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=342, PETRI_DIFFERENCE_MINUEND_FLOW=69, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=105, PETRI_PLACES=38, PETRI_TRANSITIONS=32} [2023-01-28 01:51:08,196 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, -8 predicate places. [2023-01-28 01:51:08,197 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 32 transitions, 105 flow [2023-01-28 01:51:08,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 155.57142857142858) internal successors, (1089), 7 states have internal predecessors, (1089), 0 states have call successors, (0), 0 states 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 01:51:08,197 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 01:51:08,198 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1] [2023-01-28 01:51:08,208 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-01-28 01:51:08,403 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 01:51:08,403 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 01:51:08,404 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 01:51:08,404 INFO L85 PathProgramCache]: Analyzing trace with hash 1765262020, now seen corresponding path program 2 times [2023-01-28 01:51:08,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 01:51:08,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442155170] [2023-01-28 01:51:08,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 01:51:08,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 01:51:08,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 01:51:08,551 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 01:51:08,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 01:51:08,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442155170] [2023-01-28 01:51:08,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442155170] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 01:51:08,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610487650] [2023-01-28 01:51:08,552 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 01:51:08,552 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 01:51:08,552 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 01:51:08,557 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 01:51:08,571 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 01:51:08,653 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 01:51:08,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 01:51:08,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-28 01:51:08,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 01:51:08,672 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 01:51:08,672 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 01:51:08,753 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 01:51:08,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1610487650] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 01:51:08,753 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 01:51:08,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-01-28 01:51:08,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765191256] [2023-01-28 01:51:08,754 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 01:51:08,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-01-28 01:51:08,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 01:51:08,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-01-28 01:51:08,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-01-28 01:51:08,757 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 342 [2023-01-28 01:51:08,760 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 32 transitions, 105 flow. Second operand has 13 states, 13 states have (on average 155.30769230769232) internal successors, (2019), 13 states have internal predecessors, (2019), 0 states have call successors, (0), 0 states 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 01:51:08,760 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 01:51:08,760 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 342 [2023-01-28 01:51:08,760 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 01:51:08,879 INFO L130 PetriNetUnfolder]: 60/152 cut-off events. [2023-01-28 01:51:08,879 INFO L131 PetriNetUnfolder]: For 20/20 co-relation queries the response was YES. [2023-01-28 01:51:08,880 INFO L83 FinitePrefix]: Finished finitePrefix Result has 336 conditions, 152 events. 60/152 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 398 event pairs, 51 based on Foata normal form. 6/127 useless extension candidates. Maximal degree in co-relation 278. Up to 133 conditions per place. [2023-01-28 01:51:08,881 INFO L137 encePairwiseOnDemand]: 339/342 looper letters, 24 selfloop transitions, 11 changer transitions 0/38 dead transitions. [2023-01-28 01:51:08,881 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 38 transitions, 211 flow [2023-01-28 01:51:08,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-01-28 01:51:08,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-01-28 01:51:08,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1889 transitions. [2023-01-28 01:51:08,887 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46028265107212474 [2023-01-28 01:51:08,887 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1889 transitions. [2023-01-28 01:51:08,887 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1889 transitions. [2023-01-28 01:51:08,888 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 01:51:08,888 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1889 transitions. [2023-01-28 01:51:08,892 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 157.41666666666666) internal successors, (1889), 12 states have internal predecessors, (1889), 0 states have call successors, (0), 0 states 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 01:51:08,898 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 342.0) internal successors, (4446), 13 states have internal predecessors, (4446), 0 states have call successors, (0), 0 states 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 01:51:08,901 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 342.0) internal successors, (4446), 13 states have internal predecessors, (4446), 0 states have call successors, (0), 0 states 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 01:51:08,901 INFO L175 Difference]: Start difference. First operand has 38 places, 32 transitions, 105 flow. Second operand 12 states and 1889 transitions. [2023-01-28 01:51:08,901 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 38 transitions, 211 flow [2023-01-28 01:51:08,903 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 38 transitions, 197 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-01-28 01:51:08,904 INFO L231 Difference]: Finished difference. Result has 54 places, 38 transitions, 175 flow [2023-01-28 01:51:08,904 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=342, PETRI_DIFFERENCE_MINUEND_FLOW=91, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=175, PETRI_PLACES=54, PETRI_TRANSITIONS=38} [2023-01-28 01:51:08,905 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 8 predicate places. [2023-01-28 01:51:08,906 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 38 transitions, 175 flow [2023-01-28 01:51:08,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 155.30769230769232) internal successors, (2019), 13 states have internal predecessors, (2019), 0 states have call successors, (0), 0 states 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 01:51:08,907 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 01:51:08,907 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1] [2023-01-28 01:51:08,913 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 01:51:09,112 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 01:51:09,112 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 01:51:09,113 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 01:51:09,113 INFO L85 PathProgramCache]: Analyzing trace with hash -989558236, now seen corresponding path program 3 times [2023-01-28 01:51:09,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 01:51:09,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332474519] [2023-01-28 01:51:09,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 01:51:09,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 01:51:09,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 01:51:09,159 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-28 01:51:09,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 01:51:09,206 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-28 01:51:09,207 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-28 01:51:09,207 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-01-28 01:51:09,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-01-28 01:51:09,211 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1] [2023-01-28 01:51:09,213 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-01-28 01:51:09,214 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-28 01:51:09,214 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-01-28 01:51:09,260 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-01-28 01:51:09,270 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 220 places, 263 transitions, 544 flow [2023-01-28 01:51:09,335 INFO L130 PetriNetUnfolder]: 82/449 cut-off events. [2023-01-28 01:51:09,335 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-01-28 01:51:09,340 INFO L83 FinitePrefix]: Finished finitePrefix Result has 463 conditions, 449 events. 82/449 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 1979 event pairs, 0 based on Foata normal form. 0/358 useless extension candidates. Maximal degree in co-relation 275. Up to 12 conditions per place. [2023-01-28 01:51:09,340 INFO L82 GeneralOperation]: Start removeDead. Operand has 220 places, 263 transitions, 544 flow [2023-01-28 01:51:09,344 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 220 places, 263 transitions, 544 flow [2023-01-28 01:51:09,345 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 01:51:09,345 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 220 places, 263 transitions, 544 flow [2023-01-28 01:51:09,346 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 220 places, 263 transitions, 544 flow [2023-01-28 01:51:09,346 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 220 places, 263 transitions, 544 flow [2023-01-28 01:51:09,399 INFO L130 PetriNetUnfolder]: 82/449 cut-off events. [2023-01-28 01:51:09,400 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-01-28 01:51:09,403 INFO L83 FinitePrefix]: Finished finitePrefix Result has 463 conditions, 449 events. 82/449 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 1979 event pairs, 0 based on Foata normal form. 0/358 useless extension candidates. Maximal degree in co-relation 275. Up to 12 conditions per place. [2023-01-28 01:51:09,423 INFO L119 LiptonReduction]: Number of co-enabled transitions 35052 [2023-01-28 01:51:12,098 INFO L134 LiptonReduction]: Checked pairs total: 57347 [2023-01-28 01:51:12,099 INFO L136 LiptonReduction]: Total number of compositions: 203 [2023-01-28 01:51:12,100 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-01-28 01:51:12,101 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;@631865c5, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 01:51:12,101 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-01-28 01:51:12,108 INFO L130 PetriNetUnfolder]: 39/113 cut-off events. [2023-01-28 01:51:12,108 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-01-28 01:51:12,108 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 01:51:12,108 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1] [2023-01-28 01:51:12,108 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 01:51:12,109 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 01:51:12,109 INFO L85 PathProgramCache]: Analyzing trace with hash 1710938653, now seen corresponding path program 1 times [2023-01-28 01:51:12,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 01:51:12,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93227256] [2023-01-28 01:51:12,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 01:51:12,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 01:51:12,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 01:51:12,133 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-01-28 01:51:12,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 01:51:12,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93227256] [2023-01-28 01:51:12,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93227256] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 01:51:12,133 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 01:51:12,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-28 01:51:12,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895473325] [2023-01-28 01:51:12,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 01:51:12,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 01:51:12,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 01:51:12,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 01:51:12,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-28 01:51:12,135 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 210 out of 466 [2023-01-28 01:51:12,136 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 107 transitions, 232 flow. Second operand has 3 states, 3 states have (on average 212.0) internal successors, (636), 3 states have internal predecessors, (636), 0 states have call successors, (0), 0 states 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 01:51:12,136 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 01:51:12,136 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 210 of 466 [2023-01-28 01:51:12,136 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 01:51:13,537 INFO L130 PetriNetUnfolder]: 12109/18691 cut-off events. [2023-01-28 01:51:13,537 INFO L131 PetriNetUnfolder]: For 132/132 co-relation queries the response was YES. [2023-01-28 01:51:13,564 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35981 conditions, 18691 events. 12109/18691 cut-off events. For 132/132 co-relation queries the response was YES. Maximal size of possible extension queue 558. Compared 120028 event pairs, 10328 based on Foata normal form. 3243/18283 useless extension candidates. Maximal degree in co-relation 12239. Up to 17187 conditions per place. [2023-01-28 01:51:13,593 INFO L137 encePairwiseOnDemand]: 431/466 looper letters, 40 selfloop transitions, 2 changer transitions 25/76 dead transitions. [2023-01-28 01:51:13,593 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 76 transitions, 294 flow [2023-01-28 01:51:13,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-28 01:51:13,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-28 01:51:13,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 725 transitions. [2023-01-28 01:51:13,595 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5185979971387696 [2023-01-28 01:51:13,595 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 725 transitions. [2023-01-28 01:51:13,595 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 725 transitions. [2023-01-28 01:51:13,596 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 01:51:13,596 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 725 transitions. [2023-01-28 01:51:13,597 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 241.66666666666666) internal successors, (725), 3 states have internal predecessors, (725), 0 states have call successors, (0), 0 states 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 01:51:13,599 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 466.0) internal successors, (1864), 4 states have internal predecessors, (1864), 0 states have call successors, (0), 0 states 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 01:51:13,600 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 466.0) internal successors, (1864), 4 states have internal predecessors, (1864), 0 states have call successors, (0), 0 states 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 01:51:13,600 INFO L175 Difference]: Start difference. First operand has 71 places, 107 transitions, 232 flow. Second operand 3 states and 725 transitions. [2023-01-28 01:51:13,600 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 76 transitions, 294 flow [2023-01-28 01:51:13,601 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 76 transitions, 294 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-01-28 01:51:13,602 INFO L231 Difference]: Finished difference. Result has 74 places, 51 transitions, 124 flow [2023-01-28 01:51:13,602 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=466, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=124, PETRI_PLACES=74, PETRI_TRANSITIONS=51} [2023-01-28 01:51:13,603 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 3 predicate places. [2023-01-28 01:51:13,603 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 51 transitions, 124 flow [2023-01-28 01:51:13,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 212.0) internal successors, (636), 3 states have internal predecessors, (636), 0 states have call successors, (0), 0 states 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 01:51:13,604 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 01:51:13,604 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2023-01-28 01:51:13,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-01-28 01:51:13,604 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 01:51:13,604 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 01:51:13,605 INFO L85 PathProgramCache]: Analyzing trace with hash 262369979, now seen corresponding path program 1 times [2023-01-28 01:51:13,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 01:51:13,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393238236] [2023-01-28 01:51:13,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 01:51:13,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 01:51:13,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 01:51:13,638 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-01-28 01:51:13,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 01:51:13,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393238236] [2023-01-28 01:51:13,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393238236] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 01:51:13,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343628601] [2023-01-28 01:51:13,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 01:51:13,639 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 01:51:13,640 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 01:51:13,641 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 01:51:13,673 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 01:51:13,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 01:51:13,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 3 conjunts are in the unsatisfiable core [2023-01-28 01:51:13,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 01:51:13,743 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-01-28 01:51:13,743 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 01:51:13,757 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-01-28 01:51:13,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1343628601] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 01:51:13,758 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 01:51:13,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-01-28 01:51:13,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653083120] [2023-01-28 01:51:13,758 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 01:51:13,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-01-28 01:51:13,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 01:51:13,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-01-28 01:51:13,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-01-28 01:51:13,760 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 210 out of 466 [2023-01-28 01:51:13,765 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 51 transitions, 124 flow. Second operand has 7 states, 7 states have (on average 211.71428571428572) internal successors, (1482), 7 states have internal predecessors, (1482), 0 states have call successors, (0), 0 states 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 01:51:13,765 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 01:51:13,765 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 210 of 466 [2023-01-28 01:51:13,765 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 01:51:14,071 INFO L130 PetriNetUnfolder]: 2090/3401 cut-off events. [2023-01-28 01:51:14,072 INFO L131 PetriNetUnfolder]: For 53/53 co-relation queries the response was YES. [2023-01-28 01:51:14,076 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6609 conditions, 3401 events. 2090/3401 cut-off events. For 53/53 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 18317 event pairs, 1833 based on Foata normal form. 0/2684 useless extension candidates. Maximal degree in co-relation 6596. Up to 3127 conditions per place. [2023-01-28 01:51:14,089 INFO L137 encePairwiseOnDemand]: 463/466 looper letters, 40 selfloop transitions, 5 changer transitions 0/54 dead transitions. [2023-01-28 01:51:14,089 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 54 transitions, 226 flow [2023-01-28 01:51:14,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-28 01:51:14,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-28 01:51:14,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1308 transitions. [2023-01-28 01:51:14,094 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4678111587982833 [2023-01-28 01:51:14,094 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1308 transitions. [2023-01-28 01:51:14,095 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1308 transitions. [2023-01-28 01:51:14,096 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 01:51:14,097 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1308 transitions. [2023-01-28 01:51:14,099 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 218.0) internal successors, (1308), 6 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states 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 01:51:14,102 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 466.0) internal successors, (3262), 7 states have internal predecessors, (3262), 0 states have call successors, (0), 0 states 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 01:51:14,103 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 466.0) internal successors, (3262), 7 states have internal predecessors, (3262), 0 states have call successors, (0), 0 states 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 01:51:14,103 INFO L175 Difference]: Start difference. First operand has 74 places, 51 transitions, 124 flow. Second operand 6 states and 1308 transitions. [2023-01-28 01:51:14,103 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 54 transitions, 226 flow [2023-01-28 01:51:14,107 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 54 transitions, 220 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-01-28 01:51:14,108 INFO L231 Difference]: Finished difference. Result has 60 places, 54 transitions, 154 flow [2023-01-28 01:51:14,108 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=466, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=154, PETRI_PLACES=60, PETRI_TRANSITIONS=54} [2023-01-28 01:51:14,110 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, -11 predicate places. [2023-01-28 01:51:14,111 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 54 transitions, 154 flow [2023-01-28 01:51:14,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 211.71428571428572) internal successors, (1482), 7 states have internal predecessors, (1482), 0 states have call successors, (0), 0 states 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 01:51:14,111 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 01:51:14,111 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 2, 2, 1, 1, 1, 1, 1] [2023-01-28 01:51:14,119 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-01-28 01:51:14,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 01:51:14,317 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 01:51:14,317 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 01:51:14,317 INFO L85 PathProgramCache]: Analyzing trace with hash -676654691, now seen corresponding path program 2 times [2023-01-28 01:51:14,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 01:51:14,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415629499] [2023-01-28 01:51:14,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 01:51:14,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 01:51:14,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 01:51:14,405 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-01-28 01:51:14,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 01:51:14,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415629499] [2023-01-28 01:51:14,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415629499] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 01:51:14,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748293484] [2023-01-28 01:51:14,406 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 01:51:14,406 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 01:51:14,406 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 01:51:14,409 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 01:51:14,414 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 01:51:14,482 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 01:51:14,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 01:51:14,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-28 01:51:14,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 01:51:14,506 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-01-28 01:51:14,506 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 01:51:14,550 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-01-28 01:51:14,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [748293484] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 01:51:14,551 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 01:51:14,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-01-28 01:51:14,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629105837] [2023-01-28 01:51:14,551 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 01:51:14,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-01-28 01:51:14,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 01:51:14,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-01-28 01:51:14,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-01-28 01:51:14,554 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 210 out of 466 [2023-01-28 01:51:14,556 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 54 transitions, 154 flow. Second operand has 13 states, 13 states have (on average 211.3846153846154) internal successors, (2748), 13 states have internal predecessors, (2748), 0 states have call successors, (0), 0 states 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 01:51:14,556 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 01:51:14,556 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 210 of 466 [2023-01-28 01:51:14,556 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 01:51:14,875 INFO L130 PetriNetUnfolder]: 2090/3407 cut-off events. [2023-01-28 01:51:14,875 INFO L131 PetriNetUnfolder]: For 66/66 co-relation queries the response was YES. [2023-01-28 01:51:14,880 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6639 conditions, 3407 events. 2090/3407 cut-off events. For 66/66 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 18272 event pairs, 1833 based on Foata normal form. 6/2697 useless extension candidates. Maximal degree in co-relation 6580. Up to 3127 conditions per place. [2023-01-28 01:51:14,889 INFO L137 encePairwiseOnDemand]: 463/466 looper letters, 40 selfloop transitions, 11 changer transitions 0/60 dead transitions. [2023-01-28 01:51:14,889 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 60 transitions, 292 flow [2023-01-28 01:51:14,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-01-28 01:51:14,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-01-28 01:51:14,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2577 transitions. [2023-01-28 01:51:14,896 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46083690987124465 [2023-01-28 01:51:14,896 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2577 transitions. [2023-01-28 01:51:14,896 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2577 transitions. [2023-01-28 01:51:14,897 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 01:51:14,897 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2577 transitions. [2023-01-28 01:51:14,902 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 214.75) internal successors, (2577), 12 states have internal predecessors, (2577), 0 states have call successors, (0), 0 states 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 01:51:14,909 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 466.0) internal successors, (6058), 13 states have internal predecessors, (6058), 0 states have call successors, (0), 0 states 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 01:51:14,910 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 466.0) internal successors, (6058), 13 states have internal predecessors, (6058), 0 states have call successors, (0), 0 states 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 01:51:14,911 INFO L175 Difference]: Start difference. First operand has 60 places, 54 transitions, 154 flow. Second operand 12 states and 2577 transitions. [2023-01-28 01:51:14,911 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 60 transitions, 292 flow [2023-01-28 01:51:14,912 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 60 transitions, 278 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-01-28 01:51:14,913 INFO L231 Difference]: Finished difference. Result has 76 places, 60 transitions, 224 flow [2023-01-28 01:51:14,913 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=466, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=224, PETRI_PLACES=76, PETRI_TRANSITIONS=60} [2023-01-28 01:51:14,914 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 5 predicate places. [2023-01-28 01:51:14,914 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 60 transitions, 224 flow [2023-01-28 01:51:14,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 211.3846153846154) internal successors, (2748), 13 states have internal predecessors, (2748), 0 states have call successors, (0), 0 states 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 01:51:14,915 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 01:51:14,915 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 3, 2, 2, 1, 1, 1, 1, 1] [2023-01-28 01:51:14,923 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-01-28 01:51:15,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 01:51:15,124 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 01:51:15,124 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 01:51:15,124 INFO L85 PathProgramCache]: Analyzing trace with hash -1189684003, now seen corresponding path program 3 times [2023-01-28 01:51:15,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 01:51:15,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677360969] [2023-01-28 01:51:15,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 01:51:15,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 01:51:15,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 01:51:15,147 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-28 01:51:15,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 01:51:15,199 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-28 01:51:15,200 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-28 01:51:15,200 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-01-28 01:51:15,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-01-28 01:51:15,200 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1] [2023-01-28 01:51:15,201 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-01-28 01:51:15,201 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-28 01:51:15,201 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-01-28 01:51:15,272 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-01-28 01:51:15,274 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 278 places, 334 transitions, 698 flow [2023-01-28 01:51:15,359 INFO L130 PetriNetUnfolder]: 120/656 cut-off events. [2023-01-28 01:51:15,360 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-01-28 01:51:15,367 INFO L83 FinitePrefix]: Finished finitePrefix Result has 684 conditions, 656 events. 120/656 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 3152 event pairs, 1 based on Foata normal form. 0/525 useless extension candidates. Maximal degree in co-relation 457. Up to 16 conditions per place. [2023-01-28 01:51:15,367 INFO L82 GeneralOperation]: Start removeDead. Operand has 278 places, 334 transitions, 698 flow [2023-01-28 01:51:15,375 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 278 places, 334 transitions, 698 flow [2023-01-28 01:51:15,375 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 01:51:15,376 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 278 places, 334 transitions, 698 flow [2023-01-28 01:51:15,376 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 278 places, 334 transitions, 698 flow [2023-01-28 01:51:15,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 278 places, 334 transitions, 698 flow [2023-01-28 01:51:15,445 INFO L130 PetriNetUnfolder]: 120/656 cut-off events. [2023-01-28 01:51:15,445 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-01-28 01:51:15,452 INFO L83 FinitePrefix]: Finished finitePrefix Result has 684 conditions, 656 events. 120/656 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 3152 event pairs, 1 based on Foata normal form. 0/525 useless extension candidates. Maximal degree in co-relation 457. Up to 16 conditions per place. [2023-01-28 01:51:15,476 INFO L119 LiptonReduction]: Number of co-enabled transitions 67482 [2023-01-28 01:51:18,543 INFO L134 LiptonReduction]: Checked pairs total: 115379 [2023-01-28 01:51:18,543 INFO L136 LiptonReduction]: Total number of compositions: 259 [2023-01-28 01:51:18,545 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-01-28 01:51:18,545 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;@631865c5, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 01:51:18,545 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-01-28 01:51:18,556 INFO L130 PetriNetUnfolder]: 65/184 cut-off events. [2023-01-28 01:51:18,556 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2023-01-28 01:51:18,556 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 01:51:18,556 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1] [2023-01-28 01:51:18,556 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 01:51:18,556 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 01:51:18,556 INFO L85 PathProgramCache]: Analyzing trace with hash -209680597, now seen corresponding path program 1 times [2023-01-28 01:51:18,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 01:51:18,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339131067] [2023-01-28 01:51:18,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 01:51:18,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 01:51:18,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 01:51:18,585 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-01-28 01:51:18,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 01:51:18,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339131067] [2023-01-28 01:51:18,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339131067] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 01:51:18,586 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 01:51:18,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-28 01:51:18,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879100676] [2023-01-28 01:51:18,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 01:51:18,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 01:51:18,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 01:51:18,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 01:51:18,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-28 01:51:18,588 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 266 out of 593 [2023-01-28 01:51:18,589 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 139 transitions, 308 flow. Second operand has 3 states, 3 states have (on average 268.3333333333333) internal successors, (805), 3 states have internal predecessors, (805), 0 states have call successors, (0), 0 states 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 01:51:18,589 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 01:51:18,589 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 266 of 593 [2023-01-28 01:51:18,589 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 01:51:41,594 INFO L130 PetriNetUnfolder]: 291611/404344 cut-off events. [2023-01-28 01:51:41,594 INFO L131 PetriNetUnfolder]: For 4198/4198 co-relation queries the response was YES. [2023-01-28 01:51:42,355 INFO L83 FinitePrefix]: Finished finitePrefix Result has 779861 conditions, 404344 events. 291611/404344 cut-off events. For 4198/4198 co-relation queries the response was YES. Maximal size of possible extension queue 8917. Compared 3058711 event pairs, 255919 based on Foata normal form. 69865/397351 useless extension candidates. Maximal degree in co-relation 87034. Up to 373221 conditions per place. [2023-01-28 01:51:42,842 INFO L137 encePairwiseOnDemand]: 548/593 looper letters, 57 selfloop transitions, 2 changer transitions 26/98 dead transitions. [2023-01-28 01:51:42,842 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 98 transitions, 386 flow [2023-01-28 01:51:42,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-28 01:51:42,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-28 01:51:42,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 921 transitions. [2023-01-28 01:51:42,848 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5177065767284992 [2023-01-28 01:51:42,848 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 921 transitions. [2023-01-28 01:51:42,848 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 921 transitions. [2023-01-28 01:51:42,849 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 01:51:42,849 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 921 transitions. [2023-01-28 01:51:42,851 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 307.0) internal successors, (921), 3 states have internal predecessors, (921), 0 states have call successors, (0), 0 states 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 01:51:42,854 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 593.0) internal successors, (2372), 4 states have internal predecessors, (2372), 0 states have call successors, (0), 0 states 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 01:51:42,854 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 593.0) internal successors, (2372), 4 states have internal predecessors, (2372), 0 states have call successors, (0), 0 states 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 01:51:42,854 INFO L175 Difference]: Start difference. First operand has 92 places, 139 transitions, 308 flow. Second operand 3 states and 921 transitions. [2023-01-28 01:51:42,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 98 transitions, 386 flow [2023-01-28 01:51:42,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 98 transitions, 386 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-01-28 01:51:42,861 INFO L231 Difference]: Finished difference. Result has 95 places, 72 transitions, 175 flow [2023-01-28 01:51:42,861 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=593, PETRI_DIFFERENCE_MINUEND_FLOW=224, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=175, PETRI_PLACES=95, PETRI_TRANSITIONS=72} [2023-01-28 01:51:42,863 INFO L281 CegarLoopForPetriNet]: 92 programPoint places, 3 predicate places. [2023-01-28 01:51:42,863 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 72 transitions, 175 flow [2023-01-28 01:51:42,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 268.3333333333333) internal successors, (805), 3 states have internal predecessors, (805), 0 states have call successors, (0), 0 states 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 01:51:42,863 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 01:51:42,864 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 01:51:42,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-01-28 01:51:42,866 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 01:51:42,867 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 01:51:42,867 INFO L85 PathProgramCache]: Analyzing trace with hash 856161219, now seen corresponding path program 1 times [2023-01-28 01:51:42,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 01:51:42,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043661765] [2023-01-28 01:51:42,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 01:51:42,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 01:51:42,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 01:51:42,924 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-01-28 01:51:42,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 01:51:42,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043661765] [2023-01-28 01:51:42,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043661765] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 01:51:42,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69237695] [2023-01-28 01:51:42,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 01:51:42,925 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 01:51:42,925 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 01:51:42,926 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 01:51:42,928 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 01:51:43,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 01:51:43,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 3 conjunts are in the unsatisfiable core [2023-01-28 01:51:43,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 01:51:43,023 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-01-28 01:51:43,023 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 01:51:43,041 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-01-28 01:51:43,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [69237695] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 01:51:43,042 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 01:51:43,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-01-28 01:51:43,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538923414] [2023-01-28 01:51:43,042 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 01:51:43,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-01-28 01:51:43,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 01:51:43,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-01-28 01:51:43,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-01-28 01:51:43,045 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 266 out of 593 [2023-01-28 01:51:43,047 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 72 transitions, 175 flow. Second operand has 7 states, 7 states have (on average 267.85714285714283) internal successors, (1875), 7 states have internal predecessors, (1875), 0 states have call successors, (0), 0 states 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 01:51:43,047 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 01:51:43,047 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 266 of 593 [2023-01-28 01:51:43,048 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 01:51:46,932 INFO L130 PetriNetUnfolder]: 52726/74726 cut-off events. [2023-01-28 01:51:46,932 INFO L131 PetriNetUnfolder]: For 1909/1909 co-relation queries the response was YES. [2023-01-28 01:51:47,039 INFO L83 FinitePrefix]: Finished finitePrefix Result has 144813 conditions, 74726 events. 52726/74726 cut-off events. For 1909/1909 co-relation queries the response was YES. Maximal size of possible extension queue 1957. Compared 500685 event pairs, 46777 based on Foata normal form. 0/59675 useless extension candidates. Maximal degree in co-relation 144799. Up to 68679 conditions per place. [2023-01-28 01:51:47,205 INFO L137 encePairwiseOnDemand]: 590/593 looper letters, 57 selfloop transitions, 5 changer transitions 0/75 dead transitions. [2023-01-28 01:51:47,205 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 75 transitions, 311 flow [2023-01-28 01:51:47,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-28 01:51:47,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-28 01:51:47,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1661 transitions. [2023-01-28 01:51:47,209 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46683530073074764 [2023-01-28 01:51:47,210 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1661 transitions. [2023-01-28 01:51:47,210 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1661 transitions. [2023-01-28 01:51:47,210 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 01:51:47,211 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1661 transitions. [2023-01-28 01:51:47,214 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 276.8333333333333) internal successors, (1661), 6 states have internal predecessors, (1661), 0 states have call successors, (0), 0 states 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 01:51:47,221 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 593.0) internal successors, (4151), 7 states have internal predecessors, (4151), 0 states have call successors, (0), 0 states 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 01:51:47,222 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 593.0) internal successors, (4151), 7 states have internal predecessors, (4151), 0 states have call successors, (0), 0 states 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 01:51:47,222 INFO L175 Difference]: Start difference. First operand has 95 places, 72 transitions, 175 flow. Second operand 6 states and 1661 transitions. [2023-01-28 01:51:47,222 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 75 transitions, 311 flow [2023-01-28 01:51:47,224 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 75 transitions, 301 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-01-28 01:51:47,225 INFO L231 Difference]: Finished difference. Result has 81 places, 75 transitions, 201 flow [2023-01-28 01:51:47,225 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=593, PETRI_DIFFERENCE_MINUEND_FLOW=165, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=201, PETRI_PLACES=81, PETRI_TRANSITIONS=75} [2023-01-28 01:51:47,226 INFO L281 CegarLoopForPetriNet]: 92 programPoint places, -11 predicate places. [2023-01-28 01:51:47,226 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 75 transitions, 201 flow [2023-01-28 01:51:47,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 267.85714285714283) internal successors, (1875), 7 states have internal predecessors, (1875), 0 states have call successors, (0), 0 states 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 01:51:47,227 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 01:51:47,227 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1] [2023-01-28 01:51:47,235 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 01:51:47,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-01-28 01:51:47,432 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 01:51:47,432 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 01:51:47,432 INFO L85 PathProgramCache]: Analyzing trace with hash 1409609003, now seen corresponding path program 2 times [2023-01-28 01:51:47,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 01:51:47,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103151458] [2023-01-28 01:51:47,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 01:51:47,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 01:51:47,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 01:51:47,502 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-01-28 01:51:47,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 01:51:47,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103151458] [2023-01-28 01:51:47,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103151458] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 01:51:47,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288078283] [2023-01-28 01:51:47,503 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 01:51:47,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 01:51:47,503 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 01:51:47,504 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 01:51:47,506 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 01:51:47,593 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 01:51:47,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 01:51:47,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-28 01:51:47,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 01:51:47,618 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-01-28 01:51:47,618 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 01:51:47,668 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-01-28 01:51:47,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [288078283] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 01:51:47,669 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 01:51:47,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-01-28 01:51:47,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338826108] [2023-01-28 01:51:47,670 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 01:51:47,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-01-28 01:51:47,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 01:51:47,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-01-28 01:51:47,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-01-28 01:51:47,674 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 266 out of 593 [2023-01-28 01:51:47,689 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 75 transitions, 201 flow. Second operand has 13 states, 13 states have (on average 267.46153846153845) internal successors, (3477), 13 states have internal predecessors, (3477), 0 states have call successors, (0), 0 states 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 01:51:47,689 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 01:51:47,689 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 266 of 593 [2023-01-28 01:51:47,689 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 01:51:51,738 INFO L130 PetriNetUnfolder]: 52726/74732 cut-off events. [2023-01-28 01:51:51,738 INFO L131 PetriNetUnfolder]: For 868/868 co-relation queries the response was YES. [2023-01-28 01:51:51,879 INFO L83 FinitePrefix]: Finished finitePrefix Result has 144410 conditions, 74732 events. 52726/74732 cut-off events. For 868/868 co-relation queries the response was YES. Maximal size of possible extension queue 1959. Compared 500637 event pairs, 46777 based on Foata normal form. 6/59688 useless extension candidates. Maximal degree in co-relation 144350. Up to 68679 conditions per place. [2023-01-28 01:51:52,017 INFO L137 encePairwiseOnDemand]: 590/593 looper letters, 57 selfloop transitions, 11 changer transitions 0/81 dead transitions. [2023-01-28 01:51:52,017 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 81 transitions, 373 flow [2023-01-28 01:51:52,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-01-28 01:51:52,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-01-28 01:51:52,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 3266 transitions. [2023-01-28 01:51:52,025 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4589657110736369 [2023-01-28 01:51:52,025 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 3266 transitions. [2023-01-28 01:51:52,025 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 3266 transitions. [2023-01-28 01:51:52,027 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 01:51:52,027 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 3266 transitions. [2023-01-28 01:51:52,033 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 272.1666666666667) internal successors, (3266), 12 states have internal predecessors, (3266), 0 states have call successors, (0), 0 states 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 01:51:52,041 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 593.0) internal successors, (7709), 13 states have internal predecessors, (7709), 0 states have call successors, (0), 0 states 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 01:51:52,042 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 593.0) internal successors, (7709), 13 states have internal predecessors, (7709), 0 states have call successors, (0), 0 states 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 01:51:52,042 INFO L175 Difference]: Start difference. First operand has 81 places, 75 transitions, 201 flow. Second operand 12 states and 3266 transitions. [2023-01-28 01:51:52,042 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 81 transitions, 373 flow [2023-01-28 01:51:52,044 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 81 transitions, 359 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-01-28 01:51:52,045 INFO L231 Difference]: Finished difference. Result has 97 places, 81 transitions, 271 flow [2023-01-28 01:51:52,045 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=593, PETRI_DIFFERENCE_MINUEND_FLOW=187, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=271, PETRI_PLACES=97, PETRI_TRANSITIONS=81} [2023-01-28 01:51:52,046 INFO L281 CegarLoopForPetriNet]: 92 programPoint places, 5 predicate places. [2023-01-28 01:51:52,046 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 81 transitions, 271 flow [2023-01-28 01:51:52,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 267.46153846153845) internal successors, (3477), 13 states have internal predecessors, (3477), 0 states have call successors, (0), 0 states 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 01:51:52,047 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 01:51:52,047 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 4, 3, 3, 1, 1, 1, 1, 1, 1] [2023-01-28 01:51:52,053 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 01:51:52,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 01:51:52,251 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 01:51:52,252 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 01:51:52,252 INFO L85 PathProgramCache]: Analyzing trace with hash -560863701, now seen corresponding path program 3 times [2023-01-28 01:51:52,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 01:51:52,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914474357] [2023-01-28 01:51:52,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 01:51:52,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 01:51:52,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 01:51:52,475 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-28 01:51:52,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 01:51:52,492 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-28 01:51:52,493 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-28 01:51:52,493 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-01-28 01:51:52,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-01-28 01:51:52,493 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1] [2023-01-28 01:51:52,494 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-01-28 01:51:52,494 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-28 01:51:52,494 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-01-28 01:51:52,523 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-01-28 01:51:52,526 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 336 places, 405 transitions, 854 flow [2023-01-28 01:51:52,636 INFO L130 PetriNetUnfolder]: 170/927 cut-off events. [2023-01-28 01:51:52,636 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-01-28 01:51:52,647 INFO L83 FinitePrefix]: Finished finitePrefix Result has 982 conditions, 927 events. 170/927 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 4716 event pairs, 6 based on Foata normal form. 0/748 useless extension candidates. Maximal degree in co-relation 676. Up to 32 conditions per place. [2023-01-28 01:51:52,647 INFO L82 GeneralOperation]: Start removeDead. Operand has 336 places, 405 transitions, 854 flow [2023-01-28 01:51:52,654 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 336 places, 405 transitions, 854 flow [2023-01-28 01:51:52,654 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 01:51:52,654 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 336 places, 405 transitions, 854 flow [2023-01-28 01:51:52,654 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 336 places, 405 transitions, 854 flow [2023-01-28 01:51:52,654 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 336 places, 405 transitions, 854 flow [2023-01-28 01:51:52,769 INFO L130 PetriNetUnfolder]: 170/927 cut-off events. [2023-01-28 01:51:52,769 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-01-28 01:51:52,779 INFO L83 FinitePrefix]: Finished finitePrefix Result has 982 conditions, 927 events. 170/927 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 4716 event pairs, 6 based on Foata normal form. 0/748 useless extension candidates. Maximal degree in co-relation 676. Up to 32 conditions per place. [2023-01-28 01:51:52,827 INFO L119 LiptonReduction]: Number of co-enabled transitions 109848 [2023-01-28 01:51:56,017 INFO L134 LiptonReduction]: Checked pairs total: 192210 [2023-01-28 01:51:56,018 INFO L136 LiptonReduction]: Total number of compositions: 310 [2023-01-28 01:51:56,019 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-01-28 01:51:56,020 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;@631865c5, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 01:51:56,020 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-01-28 01:51:56,036 INFO L130 PetriNetUnfolder]: 94/261 cut-off events. [2023-01-28 01:51:56,036 INFO L131 PetriNetUnfolder]: For 23/23 co-relation queries the response was YES. [2023-01-28 01:51:56,037 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 01:51:56,037 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 01:51:56,037 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 01:51:56,037 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 01:51:56,037 INFO L85 PathProgramCache]: Analyzing trace with hash 2106642474, now seen corresponding path program 1 times [2023-01-28 01:51:56,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 01:51:56,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519209473] [2023-01-28 01:51:56,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 01:51:56,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 01:51:56,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 01:51:56,075 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-01-28 01:51:56,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 01:51:56,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519209473] [2023-01-28 01:51:56,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519209473] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 01:51:56,076 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 01:51:56,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-28 01:51:56,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537759460] [2023-01-28 01:51:56,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 01:51:56,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 01:51:56,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 01:51:56,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 01:51:56,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-28 01:51:56,078 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 322 out of 715 [2023-01-28 01:51:56,078 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 172 transitions, 388 flow. Second operand has 3 states, 3 states have (on average 324.6666666666667) internal successors, (974), 3 states have internal predecessors, (974), 0 states have call successors, (0), 0 states 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 01:51:56,079 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 01:51:56,079 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 322 of 715 [2023-01-28 01:51:56,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand