/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_71-funloop_racing.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-b8dbc81 [2023-01-28 01:51:07,039 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-01-28 01:51:07,041 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-01-28 01:51:07,065 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-01-28 01:51:07,066 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-01-28 01:51:07,067 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-01-28 01:51:07,068 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-01-28 01:51:07,069 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-01-28 01:51:07,070 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-01-28 01:51:07,071 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-01-28 01:51:07,072 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-01-28 01:51:07,073 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-01-28 01:51:07,073 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-01-28 01:51:07,074 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-01-28 01:51:07,075 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-01-28 01:51:07,076 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-01-28 01:51:07,076 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-01-28 01:51:07,077 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-01-28 01:51:07,078 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-01-28 01:51:07,080 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-01-28 01:51:07,081 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-01-28 01:51:07,082 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-01-28 01:51:07,082 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-01-28 01:51:07,083 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-01-28 01:51:07,086 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-01-28 01:51:07,086 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-01-28 01:51:07,087 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-01-28 01:51:07,087 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-01-28 01:51:07,088 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-01-28 01:51:07,088 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-01-28 01:51:07,089 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-01-28 01:51:07,089 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-01-28 01:51:07,090 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-01-28 01:51:07,091 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-01-28 01:51:07,091 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-01-28 01:51:07,092 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-01-28 01:51:07,092 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-01-28 01:51:07,092 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-01-28 01:51:07,093 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-01-28 01:51:07,093 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-01-28 01:51:07,094 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-01-28 01:51:07,095 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 01:51:07,112 INFO L113 SettingsManager]: Loading preferences was successful [2023-01-28 01:51:07,112 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-01-28 01:51:07,113 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-01-28 01:51:07,113 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-01-28 01:51:07,113 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-01-28 01:51:07,113 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-01-28 01:51:07,114 INFO L138 SettingsManager]: * Use SBE=true [2023-01-28 01:51:07,114 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-01-28 01:51:07,114 INFO L138 SettingsManager]: * sizeof long=4 [2023-01-28 01:51:07,114 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-01-28 01:51:07,114 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-01-28 01:51:07,114 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-01-28 01:51:07,114 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-01-28 01:51:07,114 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-01-28 01:51:07,115 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-01-28 01:51:07,115 INFO L138 SettingsManager]: * sizeof long double=12 [2023-01-28 01:51:07,115 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-01-28 01:51:07,115 INFO L138 SettingsManager]: * Use constant arrays=true [2023-01-28 01:51:07,115 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-01-28 01:51:07,115 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-01-28 01:51:07,115 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-01-28 01:51:07,116 INFO L138 SettingsManager]: * To the following directory=./dump/ [2023-01-28 01:51:07,116 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-01-28 01:51:07,116 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-28 01:51:07,116 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-01-28 01:51:07,116 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-01-28 01:51:07,116 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-01-28 01:51:07,116 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-01-28 01:51:07,116 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-01-28 01:51:07,117 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-01-28 01:51:07,117 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-01-28 01:51:07,117 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-01-28 01:51:07,312 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-01-28 01:51:07,332 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-01-28 01:51:07,334 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-01-28 01:51:07,335 INFO L271 PluginConnector]: Initializing CDTParser... [2023-01-28 01:51:07,335 INFO L275 PluginConnector]: CDTParser initialized [2023-01-28 01:51:07,337 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_71-funloop_racing.i [2023-01-28 01:51:08,579 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-01-28 01:51:08,846 INFO L351 CDTParser]: Found 1 translation units. [2023-01-28 01:51:08,847 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_71-funloop_racing.i [2023-01-28 01:51:08,868 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/39dce201e/8b84b72f2db745de8cfcbeff033c0167/FLAG7aaf62f6c [2023-01-28 01:51:08,878 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/39dce201e/8b84b72f2db745de8cfcbeff033c0167 [2023-01-28 01:51:08,880 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-01-28 01:51:08,882 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2023-01-28 01:51:08,882 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-01-28 01:51:08,883 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-01-28 01:51:08,885 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-01-28 01:51:08,886 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.01 01:51:08" (1/1) ... [2023-01-28 01:51:08,886 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1781c78f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 01:51:08, skipping insertion in model container [2023-01-28 01:51:08,887 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.01 01:51:08" (1/1) ... [2023-01-28 01:51:08,892 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-01-28 01:51:08,922 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-01-28 01:51:09,266 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_71-funloop_racing.i[41323,41336] [2023-01-28 01:51:09,300 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-28 01:51:09,320 INFO L203 MainTranslator]: Completed pre-run [2023-01-28 01:51:09,358 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_71-funloop_racing.i[41323,41336] [2023-01-28 01:51:09,382 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-28 01:51:09,444 INFO L208 MainTranslator]: Completed translation [2023-01-28 01:51:09,445 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 01:51:09 WrapperNode [2023-01-28 01:51:09,446 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-01-28 01:51:09,447 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-01-28 01:51:09,447 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-01-28 01:51:09,447 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-01-28 01:51:09,453 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 01:51:09" (1/1) ... [2023-01-28 01:51:09,484 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 01:51:09" (1/1) ... [2023-01-28 01:51:09,518 INFO L138 Inliner]: procedures = 271, calls = 40, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 247 [2023-01-28 01:51:09,518 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-01-28 01:51:09,519 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-01-28 01:51:09,519 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-01-28 01:51:09,519 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-01-28 01:51:09,526 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 01:51:09" (1/1) ... [2023-01-28 01:51:09,527 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 01:51:09" (1/1) ... [2023-01-28 01:51:09,544 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 01:51:09" (1/1) ... [2023-01-28 01:51:09,544 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 01:51:09" (1/1) ... [2023-01-28 01:51:09,551 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 01:51:09" (1/1) ... [2023-01-28 01:51:09,556 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 01:51:09" (1/1) ... [2023-01-28 01:51:09,561 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 01:51:09" (1/1) ... [2023-01-28 01:51:09,562 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 01:51:09" (1/1) ... [2023-01-28 01:51:09,565 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-01-28 01:51:09,566 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-01-28 01:51:09,566 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-01-28 01:51:09,566 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-01-28 01:51:09,567 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 01:51:09" (1/1) ... [2023-01-28 01:51:09,575 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-28 01:51:09,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 01:51:09,604 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 01:51:09,629 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 01:51:09,649 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-01-28 01:51:09,649 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-01-28 01:51:09,649 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-01-28 01:51:09,649 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-01-28 01:51:09,649 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-01-28 01:51:09,650 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-01-28 01:51:09,650 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-01-28 01:51:09,650 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-01-28 01:51:09,650 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-01-28 01:51:09,650 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-01-28 01:51:09,650 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-01-28 01:51:09,651 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 01:51:09,827 INFO L236 CfgBuilder]: Building ICFG [2023-01-28 01:51:09,830 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-01-28 01:51:10,071 INFO L277 CfgBuilder]: Performing block encoding [2023-01-28 01:51:10,079 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-01-28 01:51:10,079 INFO L302 CfgBuilder]: Removed 35 assume(true) statements. [2023-01-28 01:51:10,081 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 01:51:10 BoogieIcfgContainer [2023-01-28 01:51:10,081 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-01-28 01:51:10,083 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-01-28 01:51:10,110 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-01-28 01:51:10,120 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-01-28 01:51:10,120 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.01 01:51:08" (1/3) ... [2023-01-28 01:51:10,122 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e8e5a43 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.01 01:51:10, skipping insertion in model container [2023-01-28 01:51:10,122 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 01:51:09" (2/3) ... [2023-01-28 01:51:10,122 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e8e5a43 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.01 01:51:10, skipping insertion in model container [2023-01-28 01:51:10,122 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 01:51:10" (3/3) ... [2023-01-28 01:51:10,123 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_71-funloop_racing.i [2023-01-28 01:51:10,139 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-01-28 01:51:10,140 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2023-01-28 01:51:10,140 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-01-28 01:51:10,212 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-01-28 01:51:10,246 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 201 places, 243 transitions, 494 flow [2023-01-28 01:51:10,323 INFO L130 PetriNetUnfolder]: 73/375 cut-off events. [2023-01-28 01:51:10,323 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-01-28 01:51:10,331 INFO L83 FinitePrefix]: Finished finitePrefix Result has 381 conditions, 375 events. 73/375 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 1649 event pairs, 0 based on Foata normal form. 0/294 useless extension candidates. Maximal degree in co-relation 206. Up to 8 conditions per place. [2023-01-28 01:51:10,331 INFO L82 GeneralOperation]: Start removeDead. Operand has 201 places, 243 transitions, 494 flow [2023-01-28 01:51:10,336 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 197 places, 238 transitions, 481 flow [2023-01-28 01:51:10,339 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 01:51:10,347 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 197 places, 238 transitions, 481 flow [2023-01-28 01:51:10,349 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 197 places, 238 transitions, 481 flow [2023-01-28 01:51:10,349 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 197 places, 238 transitions, 481 flow [2023-01-28 01:51:10,391 INFO L130 PetriNetUnfolder]: 72/370 cut-off events. [2023-01-28 01:51:10,391 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 01:51:10,393 INFO L83 FinitePrefix]: Finished finitePrefix Result has 375 conditions, 370 events. 72/370 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 1605 event pairs, 0 based on Foata normal form. 0/289 useless extension candidates. Maximal degree in co-relation 206. Up to 8 conditions per place. [2023-01-28 01:51:10,401 INFO L119 LiptonReduction]: Number of co-enabled transitions 19044 [2023-01-28 01:51:12,943 INFO L134 LiptonReduction]: Checked pairs total: 28154 [2023-01-28 01:51:12,943 INFO L136 LiptonReduction]: Total number of compositions: 181 [2023-01-28 01:51:12,969 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-01-28 01:51:12,975 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;@734dccc, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 01:51:12,975 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-01-28 01:51:12,984 INFO L130 PetriNetUnfolder]: 9/38 cut-off events. [2023-01-28 01:51:12,984 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 01:51:12,984 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 01:51:12,985 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2023-01-28 01:51:12,986 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 01:51:12,990 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 01:51:12,991 INFO L85 PathProgramCache]: Analyzing trace with hash -1071681731, now seen corresponding path program 1 times [2023-01-28 01:51:12,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 01:51:12,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632447402] [2023-01-28 01:51:12,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 01:51:13,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 01:51:13,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 01:51:13,210 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 01:51:13,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 01:51:13,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632447402] [2023-01-28 01:51:13,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632447402] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 01:51:13,212 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 01:51:13,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-28 01:51:13,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454703390] [2023-01-28 01:51:13,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 01:51:13,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 01:51:13,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 01:51:13,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 01:51:13,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-28 01:51:13,251 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 424 [2023-01-28 01:51:13,255 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 96 transitions, 197 flow. Second operand has 3 states, 3 states have (on average 194.66666666666666) internal successors, (584), 3 states have internal predecessors, (584), 0 states have call successors, (0), 0 states 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 01:51:13,256 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 01:51:13,256 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 424 [2023-01-28 01:51:13,257 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 01:51:13,503 INFO L130 PetriNetUnfolder]: 596/1256 cut-off events. [2023-01-28 01:51:13,504 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 01:51:13,507 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2355 conditions, 1256 events. 596/1256 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 7130 event pairs, 480 based on Foata normal form. 217/1239 useless extension candidates. Maximal degree in co-relation 2266. Up to 1093 conditions per place. [2023-01-28 01:51:13,510 INFO L137 encePairwiseOnDemand]: 391/424 looper letters, 22 selfloop transitions, 2 changer transitions 38/67 dead transitions. [2023-01-28 01:51:13,510 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 67 transitions, 247 flow [2023-01-28 01:51:13,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-28 01:51:13,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-28 01:51:13,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 664 transitions. [2023-01-28 01:51:13,524 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5220125786163522 [2023-01-28 01:51:13,525 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 664 transitions. [2023-01-28 01:51:13,525 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 664 transitions. [2023-01-28 01:51:13,527 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 01:51:13,529 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 664 transitions. [2023-01-28 01:51:13,533 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 221.33333333333334) internal successors, (664), 3 states have internal predecessors, (664), 0 states have call successors, (0), 0 states 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 01:51:13,539 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 424.0) internal successors, (1696), 4 states have internal predecessors, (1696), 0 states have call successors, (0), 0 states 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 01:51:13,540 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 424.0) internal successors, (1696), 4 states have internal predecessors, (1696), 0 states have call successors, (0), 0 states 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 01:51:13,541 INFO L175 Difference]: Start difference. First operand has 63 places, 96 transitions, 197 flow. Second operand 3 states and 664 transitions. [2023-01-28 01:51:13,542 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 67 transitions, 247 flow [2023-01-28 01:51:13,544 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 67 transitions, 247 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-01-28 01:51:13,546 INFO L231 Difference]: Finished difference. Result has 66 places, 29 transitions, 73 flow [2023-01-28 01:51:13,548 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=424, PETRI_DIFFERENCE_MINUEND_FLOW=137, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=73, PETRI_PLACES=66, PETRI_TRANSITIONS=29} [2023-01-28 01:51:13,551 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 3 predicate places. [2023-01-28 01:51:13,551 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 29 transitions, 73 flow [2023-01-28 01:51:13,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 194.66666666666666) internal successors, (584), 3 states have internal predecessors, (584), 0 states have call successors, (0), 0 states 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 01:51:13,552 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 01:51:13,552 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-01-28 01:51:13,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-01-28 01:51:13,552 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 01:51:13,553 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 01:51:13,553 INFO L85 PathProgramCache]: Analyzing trace with hash 1941665266, now seen corresponding path program 1 times [2023-01-28 01:51:13,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 01:51:13,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102676065] [2023-01-28 01:51:13,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 01:51:13,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 01:51:13,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 01:51:13,615 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 01:51:13,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 01:51:13,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102676065] [2023-01-28 01:51:13,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102676065] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 01:51:13,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688452895] [2023-01-28 01:51:13,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 01:51:13,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 01:51:13,616 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 01:51:13,637 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 01:51:13,663 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 01:51:13,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 01:51:13,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 3 conjunts are in the unsatisfiable core [2023-01-28 01:51:13,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 01:51:13,798 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 01:51:13,799 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 01:51:13,813 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 01:51:13,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1688452895] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 01:51:13,813 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 01:51:13,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-01-28 01:51:13,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330302992] [2023-01-28 01:51:13,814 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 01:51:13,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-01-28 01:51:13,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 01:51:13,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-01-28 01:51:13,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-01-28 01:51:13,817 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 424 [2023-01-28 01:51:13,819 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 29 transitions, 73 flow. Second operand has 7 states, 7 states have (on average 194.57142857142858) internal successors, (1362), 7 states have internal predecessors, (1362), 0 states have call successors, (0), 0 states 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 01:51:13,819 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 01:51:13,819 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 424 [2023-01-28 01:51:13,819 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 01:51:13,890 INFO L130 PetriNetUnfolder]: 54/139 cut-off events. [2023-01-28 01:51:13,891 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 01:51:13,891 INFO L83 FinitePrefix]: Finished finitePrefix Result has 277 conditions, 139 events. 54/139 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 377 event pairs, 45 based on Foata normal form. 0/109 useless extension candidates. Maximal degree in co-relation 265. Up to 119 conditions per place. [2023-01-28 01:51:13,892 INFO L137 encePairwiseOnDemand]: 421/424 looper letters, 22 selfloop transitions, 5 changer transitions 0/32 dead transitions. [2023-01-28 01:51:13,892 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 32 transitions, 139 flow [2023-01-28 01:51:13,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-28 01:51:13,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-28 01:51:13,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1188 transitions. [2023-01-28 01:51:13,895 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4669811320754717 [2023-01-28 01:51:13,895 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1188 transitions. [2023-01-28 01:51:13,895 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1188 transitions. [2023-01-28 01:51:13,896 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 01:51:13,896 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1188 transitions. [2023-01-28 01:51:13,899 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 198.0) internal successors, (1188), 6 states have internal predecessors, (1188), 0 states have call successors, (0), 0 states 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 01:51:13,905 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 424.0) internal successors, (2968), 7 states have internal predecessors, (2968), 0 states have call successors, (0), 0 states 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 01:51:13,906 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 424.0) internal successors, (2968), 7 states have internal predecessors, (2968), 0 states have call successors, (0), 0 states 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 01:51:13,906 INFO L175 Difference]: Start difference. First operand has 66 places, 29 transitions, 73 flow. Second operand 6 states and 1188 transitions. [2023-01-28 01:51:13,906 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 32 transitions, 139 flow [2023-01-28 01:51:13,907 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 32 transitions, 135 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-01-28 01:51:13,908 INFO L231 Difference]: Finished difference. Result has 38 places, 32 transitions, 105 flow [2023-01-28 01:51:13,908 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=424, 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 01:51:13,912 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, -25 predicate places. [2023-01-28 01:51:13,913 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 32 transitions, 105 flow [2023-01-28 01:51:13,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 194.57142857142858) internal successors, (1362), 7 states have internal predecessors, (1362), 0 states have call successors, (0), 0 states 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 01:51:13,914 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 01:51:13,914 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1] [2023-01-28 01:51:13,926 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 01:51:14,122 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 01:51:14,122 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 01:51:14,123 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 01:51:14,123 INFO L85 PathProgramCache]: Analyzing trace with hash -901385091, now seen corresponding path program 2 times [2023-01-28 01:51:14,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 01:51:14,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594511290] [2023-01-28 01:51:14,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 01:51:14,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 01:51:14,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 01:51:14,230 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 01:51:14,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 01:51:14,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594511290] [2023-01-28 01:51:14,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594511290] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 01:51:14,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285179192] [2023-01-28 01:51:14,231 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 01:51:14,231 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 01:51:14,231 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 01:51:14,233 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 01:51:14,246 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 01:51:14,326 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 01:51:14,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 01:51:14,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-28 01:51:14,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 01:51:14,361 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 01:51:14,361 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 01:51:14,420 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 01:51:14,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [285179192] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 01:51:14,421 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 01:51:14,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-01-28 01:51:14,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721147917] [2023-01-28 01:51:14,421 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 01:51:14,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-01-28 01:51:14,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 01:51:14,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-01-28 01:51:14,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-01-28 01:51:14,425 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 424 [2023-01-28 01:51:14,428 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 32 transitions, 105 flow. Second operand has 13 states, 13 states have (on average 194.30769230769232) internal successors, (2526), 13 states have internal predecessors, (2526), 0 states have call successors, (0), 0 states 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 01:51:14,428 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 01:51:14,428 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 424 [2023-01-28 01:51:14,428 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 01:51:14,534 INFO L130 PetriNetUnfolder]: 54/145 cut-off events. [2023-01-28 01:51:14,534 INFO L131 PetriNetUnfolder]: For 20/20 co-relation queries the response was YES. [2023-01-28 01:51:14,534 INFO L83 FinitePrefix]: Finished finitePrefix Result has 314 conditions, 145 events. 54/145 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 374 event pairs, 45 based on Foata normal form. 6/122 useless extension candidates. Maximal degree in co-relation 256. Up to 119 conditions per place. [2023-01-28 01:51:14,535 INFO L137 encePairwiseOnDemand]: 421/424 looper letters, 22 selfloop transitions, 11 changer transitions 0/38 dead transitions. [2023-01-28 01:51:14,535 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 38 transitions, 207 flow [2023-01-28 01:51:14,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-01-28 01:51:14,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-01-28 01:51:14,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2355 transitions. [2023-01-28 01:51:14,542 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46285377358490565 [2023-01-28 01:51:14,542 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2355 transitions. [2023-01-28 01:51:14,542 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2355 transitions. [2023-01-28 01:51:14,543 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 01:51:14,543 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2355 transitions. [2023-01-28 01:51:14,548 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 196.25) internal successors, (2355), 12 states have internal predecessors, (2355), 0 states have call successors, (0), 0 states 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 L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 424.0) internal successors, (5512), 13 states have internal predecessors, (5512), 0 states have call successors, (0), 0 states 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 01:51:14,560 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 424.0) internal successors, (5512), 13 states have internal predecessors, (5512), 0 states have call successors, (0), 0 states 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 01:51:14,560 INFO L175 Difference]: Start difference. First operand has 38 places, 32 transitions, 105 flow. Second operand 12 states and 2355 transitions. [2023-01-28 01:51:14,560 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 38 transitions, 207 flow [2023-01-28 01:51:14,562 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 38 transitions, 193 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-01-28 01:51:14,563 INFO L231 Difference]: Finished difference. Result has 54 places, 38 transitions, 175 flow [2023-01-28 01:51:14,563 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=424, 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 01:51:14,565 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, -9 predicate places. [2023-01-28 01:51:14,565 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 38 transitions, 175 flow [2023-01-28 01:51:14,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 194.30769230769232) internal successors, (2526), 13 states have internal predecessors, (2526), 0 states have call successors, (0), 0 states 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 01:51:14,568 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 01:51:14,568 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1] [2023-01-28 01:51:14,579 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-01-28 01:51:14,776 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 01:51:14,776 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 01:51:14,777 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 01:51:14,777 INFO L85 PathProgramCache]: Analyzing trace with hash 2050494557, now seen corresponding path program 3 times [2023-01-28 01:51:14,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 01:51:14,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695031422] [2023-01-28 01:51:14,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 01:51:14,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 01:51:14,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 01:51:14,808 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-28 01:51:14,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 01:51:14,838 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-28 01:51:14,838 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-28 01:51:14,839 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-01-28 01:51:14,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-01-28 01:51:14,841 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1] [2023-01-28 01:51:14,842 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-01-28 01:51:14,843 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-28 01:51:14,843 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-01-28 01:51:14,870 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-01-28 01:51:14,873 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 259 places, 314 transitions, 646 flow [2023-01-28 01:51:14,942 INFO L130 PetriNetUnfolder]: 118/602 cut-off events. [2023-01-28 01:51:14,942 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-01-28 01:51:14,946 INFO L83 FinitePrefix]: Finished finitePrefix Result has 616 conditions, 602 events. 118/602 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 3046 event pairs, 0 based on Foata normal form. 0/472 useless extension candidates. Maximal degree in co-relation 377. Up to 12 conditions per place. [2023-01-28 01:51:14,946 INFO L82 GeneralOperation]: Start removeDead. Operand has 259 places, 314 transitions, 646 flow [2023-01-28 01:51:14,951 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 259 places, 314 transitions, 646 flow [2023-01-28 01:51:14,951 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 01:51:14,951 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 259 places, 314 transitions, 646 flow [2023-01-28 01:51:14,952 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 259 places, 314 transitions, 646 flow [2023-01-28 01:51:14,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 259 places, 314 transitions, 646 flow [2023-01-28 01:51:15,020 INFO L130 PetriNetUnfolder]: 118/602 cut-off events. [2023-01-28 01:51:15,020 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-01-28 01:51:15,024 INFO L83 FinitePrefix]: Finished finitePrefix Result has 616 conditions, 602 events. 118/602 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 3046 event pairs, 0 based on Foata normal form. 0/472 useless extension candidates. Maximal degree in co-relation 377. Up to 12 conditions per place. [2023-01-28 01:51:15,047 INFO L119 LiptonReduction]: Number of co-enabled transitions 49128 [2023-01-28 01:51:17,914 INFO L134 LiptonReduction]: Checked pairs total: 84800 [2023-01-28 01:51:17,915 INFO L136 LiptonReduction]: Total number of compositions: 237 [2023-01-28 01:51:17,917 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-01-28 01:51:17,918 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;@734dccc, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 01:51:17,918 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-01-28 01:51:17,925 INFO L130 PetriNetUnfolder]: 57/156 cut-off events. [2023-01-28 01:51:17,926 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-01-28 01:51:17,926 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 01:51:17,926 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1] [2023-01-28 01:51:17,926 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 01:51:17,926 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 01:51:17,926 INFO L85 PathProgramCache]: Analyzing trace with hash -914023434, now seen corresponding path program 1 times [2023-01-28 01:51:17,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 01:51:17,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852456917] [2023-01-28 01:51:17,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 01:51:17,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 01:51:17,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 01:51:17,950 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 01:51:17,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 01:51:17,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852456917] [2023-01-28 01:51:17,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852456917] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 01:51:17,950 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 01:51:17,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-28 01:51:17,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123605482] [2023-01-28 01:51:17,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 01:51:17,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 01:51:17,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 01:51:17,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 01:51:17,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-28 01:51:17,952 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 249 out of 551 [2023-01-28 01:51:17,953 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 134 transitions, 286 flow. Second operand has 3 states, 3 states have (on average 251.0) internal successors, (753), 3 states have internal predecessors, (753), 0 states have call successors, (0), 0 states 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 01:51:17,953 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 01:51:17,953 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 249 of 551 [2023-01-28 01:51:17,953 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 01:51:20,150 INFO L130 PetriNetUnfolder]: 19933/30665 cut-off events. [2023-01-28 01:51:20,150 INFO L131 PetriNetUnfolder]: For 130/130 co-relation queries the response was YES. [2023-01-28 01:51:20,193 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58992 conditions, 30665 events. 19933/30665 cut-off events. For 130/130 co-relation queries the response was YES. Maximal size of possible extension queue 938. Compared 212621 event pairs, 17166 based on Foata normal form. 5463/30480 useless extension candidates. Maximal degree in co-relation 20163. Up to 28224 conditions per place. [2023-01-28 01:51:20,230 INFO L137 encePairwiseOnDemand]: 506/551 looper letters, 40 selfloop transitions, 2 changer transitions 42/93 dead transitions. [2023-01-28 01:51:20,230 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 93 transitions, 354 flow [2023-01-28 01:51:20,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-28 01:51:20,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-28 01:51:20,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 865 transitions. [2023-01-28 01:51:20,233 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5232909860859044 [2023-01-28 01:51:20,233 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 865 transitions. [2023-01-28 01:51:20,233 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 865 transitions. [2023-01-28 01:51:20,234 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 01:51:20,234 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 865 transitions. [2023-01-28 01:51:20,235 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 288.3333333333333) internal successors, (865), 3 states have internal predecessors, (865), 0 states have call successors, (0), 0 states 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 01:51:20,238 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 551.0) internal successors, (2204), 4 states have internal predecessors, (2204), 0 states have call successors, (0), 0 states 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 01:51:20,238 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 551.0) internal successors, (2204), 4 states have internal predecessors, (2204), 0 states have call successors, (0), 0 states 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 01:51:20,238 INFO L175 Difference]: Start difference. First operand has 87 places, 134 transitions, 286 flow. Second operand 3 states and 865 transitions. [2023-01-28 01:51:20,238 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 93 transitions, 354 flow [2023-01-28 01:51:20,240 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 93 transitions, 354 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-01-28 01:51:20,241 INFO L231 Difference]: Finished difference. Result has 90 places, 51 transitions, 124 flow [2023-01-28 01:51:20,242 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=551, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=124, PETRI_PLACES=90, PETRI_TRANSITIONS=51} [2023-01-28 01:51:20,242 INFO L281 CegarLoopForPetriNet]: 87 programPoint places, 3 predicate places. [2023-01-28 01:51:20,242 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 51 transitions, 124 flow [2023-01-28 01:51:20,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 251.0) internal successors, (753), 3 states have internal predecessors, (753), 0 states have call successors, (0), 0 states 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 01:51:20,243 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 01:51:20,243 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2023-01-28 01:51:20,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-01-28 01:51:20,243 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 01:51:20,244 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 01:51:20,244 INFO L85 PathProgramCache]: Analyzing trace with hash -1596128038, now seen corresponding path program 1 times [2023-01-28 01:51:20,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 01:51:20,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209113099] [2023-01-28 01:51:20,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 01:51:20,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 01:51:20,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 01:51:20,288 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 01:51:20,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 01:51:20,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209113099] [2023-01-28 01:51:20,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209113099] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 01:51:20,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216533427] [2023-01-28 01:51:20,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 01:51:20,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 01:51:20,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 01:51:20,290 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 01:51:20,299 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 01:51:20,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 01:51:20,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 3 conjunts are in the unsatisfiable core [2023-01-28 01:51:20,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 01:51:20,389 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 01:51:20,389 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 01:51:20,407 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 01:51:20,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1216533427] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 01:51:20,407 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 01:51:20,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2023-01-28 01:51:20,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048278656] [2023-01-28 01:51:20,408 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 01:51:20,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-01-28 01:51:20,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 01:51:20,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-01-28 01:51:20,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-01-28 01:51:20,411 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 249 out of 551 [2023-01-28 01:51:20,413 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 51 transitions, 124 flow. Second operand has 6 states, 6 states have (on average 250.66666666666666) internal successors, (1504), 6 states have internal predecessors, (1504), 0 states have call successors, (0), 0 states 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 01:51:20,413 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 01:51:20,413 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 249 of 551 [2023-01-28 01:51:20,413 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 01:51:20,765 INFO L130 PetriNetUnfolder]: 2090/3401 cut-off events. [2023-01-28 01:51:20,766 INFO L131 PetriNetUnfolder]: For 53/53 co-relation queries the response was YES. [2023-01-28 01:51:20,770 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 131. Compared 18305 event pairs, 1833 based on Foata normal form. 0/2685 useless extension candidates. Maximal degree in co-relation 6596. Up to 3127 conditions per place. [2023-01-28 01:51:20,779 INFO L137 encePairwiseOnDemand]: 548/551 looper letters, 40 selfloop transitions, 5 changer transitions 0/54 dead transitions. [2023-01-28 01:51:20,779 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 54 transitions, 226 flow [2023-01-28 01:51:20,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-28 01:51:20,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-28 01:51:20,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1542 transitions. [2023-01-28 01:51:20,784 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4664246823956443 [2023-01-28 01:51:20,784 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1542 transitions. [2023-01-28 01:51:20,784 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1542 transitions. [2023-01-28 01:51:20,785 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 01:51:20,785 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1542 transitions. [2023-01-28 01:51:20,788 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 257.0) internal successors, (1542), 6 states have internal predecessors, (1542), 0 states have call successors, (0), 0 states 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 01:51:20,793 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 551.0) internal successors, (3857), 7 states have internal predecessors, (3857), 0 states have call successors, (0), 0 states 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 01:51:20,793 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 551.0) internal successors, (3857), 7 states have internal predecessors, (3857), 0 states have call successors, (0), 0 states 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 01:51:20,794 INFO L175 Difference]: Start difference. First operand has 90 places, 51 transitions, 124 flow. Second operand 6 states and 1542 transitions. [2023-01-28 01:51:20,794 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 54 transitions, 226 flow [2023-01-28 01:51:20,795 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 01:51:20,795 INFO L231 Difference]: Finished difference. Result has 60 places, 54 transitions, 154 flow [2023-01-28 01:51:20,796 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=551, 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 01:51:20,796 INFO L281 CegarLoopForPetriNet]: 87 programPoint places, -27 predicate places. [2023-01-28 01:51:20,797 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 54 transitions, 154 flow [2023-01-28 01:51:20,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 250.66666666666666) internal successors, (1504), 6 states have internal predecessors, (1504), 0 states have call successors, (0), 0 states 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 01:51:20,797 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 01:51:20,797 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 2, 2, 1, 1, 1, 1, 1] [2023-01-28 01:51:20,812 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-01-28 01:51:21,005 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 01:51:21,005 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 01:51:21,006 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 01:51:21,006 INFO L85 PathProgramCache]: Analyzing trace with hash -727042826, now seen corresponding path program 2 times [2023-01-28 01:51:21,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 01:51:21,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991438434] [2023-01-28 01:51:21,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 01:51:21,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 01:51:21,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 01:51:21,093 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 01:51:21,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 01:51:21,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991438434] [2023-01-28 01:51:21,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991438434] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 01:51:21,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963176854] [2023-01-28 01:51:21,094 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 01:51:21,094 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 01:51:21,094 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 01:51:21,095 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 01:51:21,098 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 01:51:21,178 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 01:51:21,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 01:51:21,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-28 01:51:21,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 01:51:21,199 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 01:51:21,199 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 01:51:21,249 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 01:51:21,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [963176854] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 01:51:21,249 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 01:51:21,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2023-01-28 01:51:21,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374163022] [2023-01-28 01:51:21,250 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 01:51:21,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-01-28 01:51:21,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 01:51:21,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-01-28 01:51:21,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2023-01-28 01:51:21,253 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 249 out of 551 [2023-01-28 01:51:21,256 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 54 transitions, 154 flow. Second operand has 12 states, 12 states have (on average 250.33333333333334) internal successors, (3004), 12 states have internal predecessors, (3004), 0 states have call successors, (0), 0 states 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 01:51:21,256 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 01:51:21,256 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 249 of 551 [2023-01-28 01:51:21,256 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 01:51:21,610 INFO L130 PetriNetUnfolder]: 2090/3407 cut-off events. [2023-01-28 01:51:21,611 INFO L131 PetriNetUnfolder]: For 66/66 co-relation queries the response was YES. [2023-01-28 01:51:21,616 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 132. Compared 18331 event pairs, 1833 based on Foata normal form. 6/2698 useless extension candidates. Maximal degree in co-relation 6580. Up to 3127 conditions per place. [2023-01-28 01:51:21,626 INFO L137 encePairwiseOnDemand]: 548/551 looper letters, 40 selfloop transitions, 11 changer transitions 0/60 dead transitions. [2023-01-28 01:51:21,626 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 60 transitions, 292 flow [2023-01-28 01:51:21,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-01-28 01:51:21,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-01-28 01:51:21,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 3045 transitions. [2023-01-28 01:51:21,634 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4605263157894737 [2023-01-28 01:51:21,635 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 3045 transitions. [2023-01-28 01:51:21,635 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 3045 transitions. [2023-01-28 01:51:21,636 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 01:51:21,636 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 3045 transitions. [2023-01-28 01:51:21,642 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 253.75) internal successors, (3045), 12 states have internal predecessors, (3045), 0 states have call successors, (0), 0 states 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 01:51:21,652 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 551.0) internal successors, (7163), 13 states have internal predecessors, (7163), 0 states have call successors, (0), 0 states 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 01:51:21,653 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 551.0) internal successors, (7163), 13 states have internal predecessors, (7163), 0 states have call successors, (0), 0 states 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 01:51:21,654 INFO L175 Difference]: Start difference. First operand has 60 places, 54 transitions, 154 flow. Second operand 12 states and 3045 transitions. [2023-01-28 01:51:21,654 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 60 transitions, 292 flow [2023-01-28 01:51:21,655 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 01:51:21,656 INFO L231 Difference]: Finished difference. Result has 76 places, 60 transitions, 224 flow [2023-01-28 01:51:21,656 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=551, 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 01:51:21,657 INFO L281 CegarLoopForPetriNet]: 87 programPoint places, -11 predicate places. [2023-01-28 01:51:21,657 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 60 transitions, 224 flow [2023-01-28 01:51:21,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 250.33333333333334) internal successors, (3004), 12 states have internal predecessors, (3004), 0 states have call successors, (0), 0 states 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 01:51:21,658 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 01:51:21,659 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 3, 2, 2, 1, 1, 1, 1, 1] [2023-01-28 01:51:21,667 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 01:51:21,864 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 01:51:21,865 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 01:51:21,865 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 01:51:21,865 INFO L85 PathProgramCache]: Analyzing trace with hash 1643342454, now seen corresponding path program 3 times [2023-01-28 01:51:21,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 01:51:21,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339053200] [2023-01-28 01:51:21,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 01:51:21,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 01:51:21,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 01:51:21,888 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-28 01:51:21,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 01:51:21,925 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-28 01:51:21,925 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-28 01:51:21,925 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-01-28 01:51:21,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-01-28 01:51:21,926 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1] [2023-01-28 01:51:21,926 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-01-28 01:51:21,926 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-28 01:51:21,926 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-01-28 01:51:21,972 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-01-28 01:51:21,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 317 places, 385 transitions, 800 flow [2023-01-28 01:51:22,109 INFO L130 PetriNetUnfolder]: 168/860 cut-off events. [2023-01-28 01:51:22,109 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-01-28 01:51:22,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 888 conditions, 860 events. 168/860 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 4631 event pairs, 1 based on Foata normal form. 0/677 useless extension candidates. Maximal degree in co-relation 610. Up to 16 conditions per place. [2023-01-28 01:51:22,123 INFO L82 GeneralOperation]: Start removeDead. Operand has 317 places, 385 transitions, 800 flow [2023-01-28 01:51:22,134 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 317 places, 385 transitions, 800 flow [2023-01-28 01:51:22,134 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 01:51:22,134 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 317 places, 385 transitions, 800 flow [2023-01-28 01:51:22,134 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 317 places, 385 transitions, 800 flow [2023-01-28 01:51:22,135 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 317 places, 385 transitions, 800 flow [2023-01-28 01:51:22,233 INFO L130 PetriNetUnfolder]: 168/860 cut-off events. [2023-01-28 01:51:22,233 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-01-28 01:51:22,245 INFO L83 FinitePrefix]: Finished finitePrefix Result has 888 conditions, 860 events. 168/860 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 4631 event pairs, 1 based on Foata normal form. 0/677 useless extension candidates. Maximal degree in co-relation 610. Up to 16 conditions per place. [2023-01-28 01:51:22,280 INFO L119 LiptonReduction]: Number of co-enabled transitions 88596 [2023-01-28 01:51:25,523 INFO L134 LiptonReduction]: Checked pairs total: 155009 [2023-01-28 01:51:25,523 INFO L136 LiptonReduction]: Total number of compositions: 294 [2023-01-28 01:51:25,525 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-01-28 01:51:25,525 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;@734dccc, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 01:51:25,525 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-01-28 01:51:25,540 INFO L130 PetriNetUnfolder]: 95/255 cut-off events. [2023-01-28 01:51:25,540 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2023-01-28 01:51:25,540 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 01:51:25,540 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1] [2023-01-28 01:51:25,541 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 01:51:25,541 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 01:51:25,541 INFO L85 PathProgramCache]: Analyzing trace with hash -918744804, now seen corresponding path program 1 times [2023-01-28 01:51:25,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 01:51:25,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81292772] [2023-01-28 01:51:25,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 01:51:25,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 01:51:25,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 01:51:25,571 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 01:51:25,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 01:51:25,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81292772] [2023-01-28 01:51:25,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81292772] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 01:51:25,572 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 01:51:25,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-28 01:51:25,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517698864] [2023-01-28 01:51:25,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 01:51:25,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 01:51:25,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 01:51:25,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 01:51:25,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-28 01:51:25,574 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 305 out of 679 [2023-01-28 01:51:25,575 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 167 transitions, 364 flow. Second operand has 3 states, 3 states have (on average 307.3333333333333) internal successors, (922), 3 states have internal predecessors, (922), 0 states have call successors, (0), 0 states 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 01:51:25,575 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 01:51:25,575 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 305 of 679 [2023-01-28 01:51:25,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 01:52:04,612 INFO L130 PetriNetUnfolder]: 477490/661456 cut-off events. [2023-01-28 01:52:04,612 INFO L131 PetriNetUnfolder]: For 4158/4158 co-relation queries the response was YES. [2023-01-28 01:52:05,487 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1274314 conditions, 661456 events. 477490/661456 cut-off events. For 4158/4158 co-relation queries the response was YES. Maximal size of possible extension queue 14640. Compared 5278701 event pairs, 422085 based on Foata normal form. 116547/658031 useless extension candidates. Maximal degree in co-relation 143396. Up to 610562 conditions per place. [2023-01-28 01:52:06,121 INFO L137 encePairwiseOnDemand]: 623/679 looper letters, 57 selfloop transitions, 2 changer transitions 43/115 dead transitions. [2023-01-28 01:52:06,122 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 115 transitions, 446 flow [2023-01-28 01:52:06,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-28 01:52:06,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-28 01:52:06,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1062 transitions. [2023-01-28 01:52:06,126 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5213549337260678 [2023-01-28 01:52:06,126 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1062 transitions. [2023-01-28 01:52:06,126 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1062 transitions. [2023-01-28 01:52:06,127 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 01:52:06,127 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1062 transitions. [2023-01-28 01:52:06,130 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 354.0) internal successors, (1062), 3 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states 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 01:52:06,133 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 679.0) internal successors, (2716), 4 states have internal predecessors, (2716), 0 states have call successors, (0), 0 states 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 01:52:06,134 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 679.0) internal successors, (2716), 4 states have internal predecessors, (2716), 0 states have call successors, (0), 0 states 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 01:52:06,134 INFO L175 Difference]: Start difference. First operand has 108 places, 167 transitions, 364 flow. Second operand 3 states and 1062 transitions. [2023-01-28 01:52:06,134 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 115 transitions, 446 flow [2023-01-28 01:52:06,141 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 115 transitions, 446 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-01-28 01:52:06,143 INFO L231 Difference]: Finished difference. Result has 111 places, 72 transitions, 175 flow [2023-01-28 01:52:06,143 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=679, PETRI_DIFFERENCE_MINUEND_FLOW=258, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=175, PETRI_PLACES=111, PETRI_TRANSITIONS=72} [2023-01-28 01:52:06,144 INFO L281 CegarLoopForPetriNet]: 108 programPoint places, 3 predicate places. [2023-01-28 01:52:06,144 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 72 transitions, 175 flow [2023-01-28 01:52:06,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 307.3333333333333) internal successors, (922), 3 states have internal predecessors, (922), 0 states have call successors, (0), 0 states 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 01:52:06,156 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 01:52:06,156 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 01:52:06,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-01-28 01:52:06,156 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 01:52:06,157 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 01:52:06,157 INFO L85 PathProgramCache]: Analyzing trace with hash -1623026964, now seen corresponding path program 1 times [2023-01-28 01:52:06,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 01:52:06,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386716545] [2023-01-28 01:52:06,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 01:52:06,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 01:52:06,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 01:52:06,189 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 01:52:06,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 01:52:06,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386716545] [2023-01-28 01:52:06,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386716545] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 01:52:06,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003261449] [2023-01-28 01:52:06,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 01:52:06,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 01:52:06,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 01:52:06,193 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 01:52:06,195 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 01:52:06,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 01:52:06,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 3 conjunts are in the unsatisfiable core [2023-01-28 01:52:06,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 01:52:06,291 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 01:52:06,291 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 01:52:06,303 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 01:52:06,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1003261449] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 01:52:06,304 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 01:52:06,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-01-28 01:52:06,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814270943] [2023-01-28 01:52:06,304 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 01:52:06,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-01-28 01:52:06,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 01:52:06,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-01-28 01:52:06,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-01-28 01:52:06,307 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 305 out of 679 [2023-01-28 01:52:06,309 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 72 transitions, 175 flow. Second operand has 7 states, 7 states have (on average 306.85714285714283) internal successors, (2148), 7 states have internal predecessors, (2148), 0 states have call successors, (0), 0 states 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 01:52:06,309 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 01:52:06,309 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 305 of 679 [2023-01-28 01:52:06,310 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 01:52:10,165 INFO L130 PetriNetUnfolder]: 52726/74726 cut-off events. [2023-01-28 01:52:10,165 INFO L131 PetriNetUnfolder]: For 1909/1909 co-relation queries the response was YES. [2023-01-28 01:52:10,279 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 1958. Compared 500054 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 01:52:10,471 INFO L137 encePairwiseOnDemand]: 676/679 looper letters, 57 selfloop transitions, 5 changer transitions 0/75 dead transitions. [2023-01-28 01:52:10,471 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 75 transitions, 311 flow [2023-01-28 01:52:10,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-28 01:52:10,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-28 01:52:10,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1895 transitions. [2023-01-28 01:52:10,476 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4651448208149239 [2023-01-28 01:52:10,477 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1895 transitions. [2023-01-28 01:52:10,477 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1895 transitions. [2023-01-28 01:52:10,478 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 01:52:10,478 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1895 transitions. [2023-01-28 01:52:10,481 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 315.8333333333333) internal successors, (1895), 6 states have internal predecessors, (1895), 0 states have call successors, (0), 0 states 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 01:52:10,486 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 679.0) internal successors, (4753), 7 states have internal predecessors, (4753), 0 states have call successors, (0), 0 states 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 01:52:10,487 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 679.0) internal successors, (4753), 7 states have internal predecessors, (4753), 0 states have call successors, (0), 0 states 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 01:52:10,487 INFO L175 Difference]: Start difference. First operand has 111 places, 72 transitions, 175 flow. Second operand 6 states and 1895 transitions. [2023-01-28 01:52:10,487 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 75 transitions, 311 flow [2023-01-28 01:52:10,489 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 01:52:10,491 INFO L231 Difference]: Finished difference. Result has 81 places, 75 transitions, 201 flow [2023-01-28 01:52:10,491 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=679, 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 01:52:10,492 INFO L281 CegarLoopForPetriNet]: 108 programPoint places, -27 predicate places. [2023-01-28 01:52:10,492 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 75 transitions, 201 flow [2023-01-28 01:52:10,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 306.85714285714283) internal successors, (2148), 7 states have internal predecessors, (2148), 0 states have call successors, (0), 0 states 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 01:52:10,493 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 01:52:10,493 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1] [2023-01-28 01:52:10,500 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 01:52:10,697 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 01:52:10,698 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 01:52:10,698 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 01:52:10,698 INFO L85 PathProgramCache]: Analyzing trace with hash -545848036, now seen corresponding path program 2 times [2023-01-28 01:52:10,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 01:52:10,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981975248] [2023-01-28 01:52:10,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 01:52:10,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 01:52:10,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 01:52:10,777 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 01:52:10,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 01:52:10,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981975248] [2023-01-28 01:52:10,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981975248] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 01:52:10,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035088296] [2023-01-28 01:52:10,778 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 01:52:10,778 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 01:52:10,778 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 01:52:10,779 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 01:52:10,782 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 01:52:10,870 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 01:52:10,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 01:52:10,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-28 01:52:10,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 01:52:10,890 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 01:52:10,890 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 01:52:10,934 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 01:52:10,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1035088296] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 01:52:10,934 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 01:52:10,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-01-28 01:52:10,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472322733] [2023-01-28 01:52:10,936 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 01:52:10,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-01-28 01:52:10,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 01:52:10,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-01-28 01:52:10,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-01-28 01:52:10,941 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 305 out of 679 [2023-01-28 01:52:10,944 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 75 transitions, 201 flow. Second operand has 13 states, 13 states have (on average 306.46153846153845) internal successors, (3984), 13 states have internal predecessors, (3984), 0 states have call successors, (0), 0 states 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 01:52:10,944 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 01:52:10,944 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 305 of 679 [2023-01-28 01:52:10,944 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 01:52:15,086 INFO L130 PetriNetUnfolder]: 52726/74732 cut-off events. [2023-01-28 01:52:15,086 INFO L131 PetriNetUnfolder]: For 868/868 co-relation queries the response was YES. [2023-01-28 01:52:15,242 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 1957. Compared 499961 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 01:52:15,419 INFO L137 encePairwiseOnDemand]: 676/679 looper letters, 57 selfloop transitions, 11 changer transitions 0/81 dead transitions. [2023-01-28 01:52:15,419 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 81 transitions, 373 flow [2023-01-28 01:52:15,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-01-28 01:52:15,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-01-28 01:52:15,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 3734 transitions. [2023-01-28 01:52:15,428 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4582719685812469 [2023-01-28 01:52:15,428 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 3734 transitions. [2023-01-28 01:52:15,428 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 3734 transitions. [2023-01-28 01:52:15,430 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 01:52:15,430 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 3734 transitions. [2023-01-28 01:52:15,438 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 311.1666666666667) internal successors, (3734), 12 states have internal predecessors, (3734), 0 states have call successors, (0), 0 states 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 01:52:15,447 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 679.0) internal successors, (8827), 13 states have internal predecessors, (8827), 0 states have call successors, (0), 0 states 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 01:52:15,449 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 679.0) internal successors, (8827), 13 states have internal predecessors, (8827), 0 states have call successors, (0), 0 states 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 01:52:15,450 INFO L175 Difference]: Start difference. First operand has 81 places, 75 transitions, 201 flow. Second operand 12 states and 3734 transitions. [2023-01-28 01:52:15,450 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 81 transitions, 373 flow [2023-01-28 01:52:15,451 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 01:52:15,452 INFO L231 Difference]: Finished difference. Result has 97 places, 81 transitions, 271 flow [2023-01-28 01:52:15,453 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=679, 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 01:52:15,453 INFO L281 CegarLoopForPetriNet]: 108 programPoint places, -11 predicate places. [2023-01-28 01:52:15,453 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 81 transitions, 271 flow [2023-01-28 01:52:15,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 306.46153846153845) internal successors, (3984), 13 states have internal predecessors, (3984), 0 states have call successors, (0), 0 states 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 01:52:15,455 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 01:52:15,455 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 4, 3, 3, 1, 1, 1, 1, 1, 1] [2023-01-28 01:52:15,463 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 01:52:15,660 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 01:52:15,660 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 01:52:15,661 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 01:52:15,661 INFO L85 PathProgramCache]: Analyzing trace with hash 829240092, now seen corresponding path program 3 times [2023-01-28 01:52:15,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 01:52:15,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452199244] [2023-01-28 01:52:15,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 01:52:15,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 01:52:15,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 01:52:15,679 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-28 01:52:15,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 01:52:15,705 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-28 01:52:15,706 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-28 01:52:15,706 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-01-28 01:52:15,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-01-28 01:52:15,706 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1] [2023-01-28 01:52:15,707 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-01-28 01:52:15,707 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-28 01:52:15,707 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-01-28 01:52:15,742 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-01-28 01:52:15,745 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 375 places, 456 transitions, 956 flow [2023-01-28 01:52:16,118 INFO L130 PetriNetUnfolder]: 230/1182 cut-off events. [2023-01-28 01:52:16,118 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-01-28 01:52:16,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1237 conditions, 1182 events. 230/1182 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 6634 event pairs, 6 based on Foata normal form. 0/938 useless extension candidates. Maximal degree in co-relation 880. Up to 32 conditions per place. [2023-01-28 01:52:16,131 INFO L82 GeneralOperation]: Start removeDead. Operand has 375 places, 456 transitions, 956 flow [2023-01-28 01:52:16,138 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 375 places, 456 transitions, 956 flow [2023-01-28 01:52:16,138 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 01:52:16,138 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 375 places, 456 transitions, 956 flow [2023-01-28 01:52:16,138 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 375 places, 456 transitions, 956 flow [2023-01-28 01:52:16,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 375 places, 456 transitions, 956 flow [2023-01-28 01:52:16,247 INFO L130 PetriNetUnfolder]: 230/1182 cut-off events. [2023-01-28 01:52:16,248 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-01-28 01:52:16,262 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1237 conditions, 1182 events. 230/1182 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 6634 event pairs, 6 based on Foata normal form. 0/938 useless extension candidates. Maximal degree in co-relation 880. Up to 32 conditions per place. [2023-01-28 01:52:16,327 INFO L119 LiptonReduction]: Number of co-enabled transitions 138000 [2023-01-28 01:52:19,728 INFO L134 LiptonReduction]: Checked pairs total: 244685 [2023-01-28 01:52:19,728 INFO L136 LiptonReduction]: Total number of compositions: 342 [2023-01-28 01:52:19,732 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-01-28 01:52:19,732 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;@734dccc, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 01:52:19,733 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-01-28 01:52:19,755 INFO L130 PetriNetUnfolder]: 134/357 cut-off events. [2023-01-28 01:52:19,755 INFO L131 PetriNetUnfolder]: For 22/22 co-relation queries the response was YES. [2023-01-28 01:52:19,755 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 01:52:19,755 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 01:52:19,755 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 01:52:19,756 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 01:52:19,756 INFO L85 PathProgramCache]: Analyzing trace with hash -1617637136, now seen corresponding path program 1 times [2023-01-28 01:52:19,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 01:52:19,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999250603] [2023-01-28 01:52:19,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 01:52:19,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 01:52:19,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 01:52:19,787 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 01:52:19,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 01:52:19,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999250603] [2023-01-28 01:52:19,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999250603] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 01:52:19,788 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 01:52:19,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-28 01:52:19,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882220991] [2023-01-28 01:52:19,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 01:52:19,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 01:52:19,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 01:52:19,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 01:52:19,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-28 01:52:19,790 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 361 out of 798 [2023-01-28 01:52:19,791 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 199 transitions, 442 flow. Second operand has 3 states, 3 states have (on average 363.6666666666667) internal successors, (1091), 3 states have internal predecessors, (1091), 0 states have call successors, (0), 0 states 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 01:52:19,791 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 01:52:19,791 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 361 of 798 [2023-01-28 01:52:19,791 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand