/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_42-trylock2_racefree.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-b8dbc81 [2023-01-28 07:54:58,077 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-01-28 07:54:58,079 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-01-28 07:54:58,107 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-01-28 07:54:58,107 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-01-28 07:54:58,109 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-01-28 07:54:58,111 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-01-28 07:54:58,113 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-01-28 07:54:58,114 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-01-28 07:54:58,117 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-01-28 07:54:58,118 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-01-28 07:54:58,120 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-01-28 07:54:58,120 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-01-28 07:54:58,121 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-01-28 07:54:58,122 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-01-28 07:54:58,123 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-01-28 07:54:58,123 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-01-28 07:54:58,124 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-01-28 07:54:58,125 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-01-28 07:54:58,128 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-01-28 07:54:58,129 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-01-28 07:54:58,130 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-01-28 07:54:58,130 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-01-28 07:54:58,131 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-01-28 07:54:58,137 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-01-28 07:54:58,137 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-01-28 07:54:58,137 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-01-28 07:54:58,138 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-01-28 07:54:58,138 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-01-28 07:54:58,139 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-01-28 07:54:58,139 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-01-28 07:54:58,139 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-01-28 07:54:58,140 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-01-28 07:54:58,140 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-01-28 07:54:58,141 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-01-28 07:54:58,141 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-01-28 07:54:58,141 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-01-28 07:54:58,141 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-01-28 07:54:58,141 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-01-28 07:54:58,142 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-01-28 07:54:58,143 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-01-28 07:54:58,144 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 07:54:58,167 INFO L113 SettingsManager]: Loading preferences was successful [2023-01-28 07:54:58,167 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-01-28 07:54:58,168 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-01-28 07:54:58,168 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-01-28 07:54:58,168 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-01-28 07:54:58,169 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-01-28 07:54:58,169 INFO L138 SettingsManager]: * Use SBE=true [2023-01-28 07:54:58,169 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-01-28 07:54:58,169 INFO L138 SettingsManager]: * sizeof long=4 [2023-01-28 07:54:58,169 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-01-28 07:54:58,169 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-01-28 07:54:58,169 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-01-28 07:54:58,170 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-01-28 07:54:58,170 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-01-28 07:54:58,170 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-01-28 07:54:58,170 INFO L138 SettingsManager]: * sizeof long double=12 [2023-01-28 07:54:58,170 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-01-28 07:54:58,170 INFO L138 SettingsManager]: * Use constant arrays=true [2023-01-28 07:54:58,170 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-01-28 07:54:58,170 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-01-28 07:54:58,170 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-01-28 07:54:58,170 INFO L138 SettingsManager]: * To the following directory=./dump/ [2023-01-28 07:54:58,170 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-01-28 07:54:58,170 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-28 07:54:58,171 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-01-28 07:54:58,171 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-01-28 07:54:58,171 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-01-28 07:54:58,171 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-01-28 07:54:58,171 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-01-28 07:54:58,171 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-01-28 07:54:58,171 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-01-28 07:54:58,171 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-01-28 07:54:58,361 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-01-28 07:54:58,378 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-01-28 07:54:58,380 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-01-28 07:54:58,381 INFO L271 PluginConnector]: Initializing CDTParser... [2023-01-28 07:54:58,381 INFO L275 PluginConnector]: CDTParser initialized [2023-01-28 07:54:58,382 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_42-trylock2_racefree.i [2023-01-28 07:54:59,311 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-01-28 07:54:59,477 INFO L351 CDTParser]: Found 1 translation units. [2023-01-28 07:54:59,481 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_42-trylock2_racefree.i [2023-01-28 07:54:59,488 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e91a056d7/51bbe2633ebf418783502f00e92df822/FLAG72d9ffccc [2023-01-28 07:54:59,497 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e91a056d7/51bbe2633ebf418783502f00e92df822 [2023-01-28 07:54:59,499 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-01-28 07:54:59,500 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2023-01-28 07:54:59,501 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-01-28 07:54:59,501 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-01-28 07:54:59,503 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-01-28 07:54:59,503 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.01 07:54:59" (1/1) ... [2023-01-28 07:54:59,504 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@26177d0d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 07:54:59, skipping insertion in model container [2023-01-28 07:54:59,504 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.01 07:54:59" (1/1) ... [2023-01-28 07:54:59,508 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-01-28 07:54:59,534 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-01-28 07:54:59,741 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_42-trylock2_racefree.i[30176,30189] [2023-01-28 07:54:59,769 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-28 07:54:59,781 INFO L203 MainTranslator]: Completed pre-run [2023-01-28 07:54:59,800 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_42-trylock2_racefree.i[30176,30189] [2023-01-28 07:54:59,806 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-28 07:54:59,827 INFO L208 MainTranslator]: Completed translation [2023-01-28 07:54:59,828 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 07:54:59 WrapperNode [2023-01-28 07:54:59,828 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-01-28 07:54:59,829 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-01-28 07:54:59,829 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-01-28 07:54:59,829 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-01-28 07:54:59,833 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 07:54:59" (1/1) ... [2023-01-28 07:54:59,841 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 07:54:59" (1/1) ... [2023-01-28 07:54:59,855 INFO L138 Inliner]: procedures = 171, calls = 47, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 130 [2023-01-28 07:54:59,855 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-01-28 07:54:59,856 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-01-28 07:54:59,856 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-01-28 07:54:59,856 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-01-28 07:54:59,862 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 07:54:59" (1/1) ... [2023-01-28 07:54:59,862 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 07:54:59" (1/1) ... [2023-01-28 07:54:59,864 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 07:54:59" (1/1) ... [2023-01-28 07:54:59,864 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 07:54:59" (1/1) ... [2023-01-28 07:54:59,868 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 07:54:59" (1/1) ... [2023-01-28 07:54:59,872 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 07:54:59" (1/1) ... [2023-01-28 07:54:59,873 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 07:54:59" (1/1) ... [2023-01-28 07:54:59,874 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 07:54:59" (1/1) ... [2023-01-28 07:54:59,876 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-01-28 07:54:59,877 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-01-28 07:54:59,877 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-01-28 07:54:59,877 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-01-28 07:54:59,878 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 07:54:59" (1/1) ... [2023-01-28 07:54:59,881 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-28 07:54:59,890 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 07:54:59,902 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 07:54:59,922 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 07:54:59,936 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-01-28 07:54:59,936 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-01-28 07:54:59,936 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-01-28 07:54:59,936 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-01-28 07:54:59,936 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-01-28 07:54:59,936 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-01-28 07:54:59,936 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-01-28 07:54:59,936 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-01-28 07:54:59,936 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexTryLock [2023-01-28 07:54:59,936 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-01-28 07:54:59,936 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-01-28 07:54:59,936 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-01-28 07:54:59,937 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 07:55:00,078 INFO L236 CfgBuilder]: Building ICFG [2023-01-28 07:55:00,079 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-01-28 07:55:00,264 INFO L277 CfgBuilder]: Performing block encoding [2023-01-28 07:55:00,272 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-01-28 07:55:00,272 INFO L302 CfgBuilder]: Removed 23 assume(true) statements. [2023-01-28 07:55:00,274 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 07:55:00 BoogieIcfgContainer [2023-01-28 07:55:00,274 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-01-28 07:55:00,275 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-01-28 07:55:00,275 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-01-28 07:55:00,277 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-01-28 07:55:00,277 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.01 07:54:59" (1/3) ... [2023-01-28 07:55:00,278 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5295aec4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.01 07:55:00, skipping insertion in model container [2023-01-28 07:55:00,278 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 07:54:59" (2/3) ... [2023-01-28 07:55:00,278 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5295aec4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.01 07:55:00, skipping insertion in model container [2023-01-28 07:55:00,278 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 07:55:00" (3/3) ... [2023-01-28 07:55:00,279 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_42-trylock2_racefree.i [2023-01-28 07:55:00,290 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-01-28 07:55:00,290 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2023-01-28 07:55:00,290 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-01-28 07:55:00,343 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-01-28 07:55:00,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 158 places, 184 transitions, 376 flow [2023-01-28 07:55:00,425 INFO L130 PetriNetUnfolder]: 45/269 cut-off events. [2023-01-28 07:55:00,425 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-01-28 07:55:00,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 275 conditions, 269 events. 45/269 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1001 event pairs, 0 based on Foata normal form. 0/213 useless extension candidates. Maximal degree in co-relation 143. Up to 6 conditions per place. [2023-01-28 07:55:00,430 INFO L82 GeneralOperation]: Start removeDead. Operand has 158 places, 184 transitions, 376 flow [2023-01-28 07:55:00,434 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 154 places, 179 transitions, 363 flow [2023-01-28 07:55:00,436 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 07:55:00,447 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 154 places, 179 transitions, 363 flow [2023-01-28 07:55:00,451 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 154 places, 179 transitions, 363 flow [2023-01-28 07:55:00,452 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 154 places, 179 transitions, 363 flow [2023-01-28 07:55:00,496 INFO L130 PetriNetUnfolder]: 44/264 cut-off events. [2023-01-28 07:55:00,496 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 07:55:00,500 INFO L83 FinitePrefix]: Finished finitePrefix Result has 269 conditions, 264 events. 44/264 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 985 event pairs, 0 based on Foata normal form. 0/208 useless extension candidates. Maximal degree in co-relation 143. Up to 6 conditions per place. [2023-01-28 07:55:00,506 INFO L119 LiptonReduction]: Number of co-enabled transitions 9646 [2023-01-28 07:55:03,148 INFO L134 LiptonReduction]: Checked pairs total: 21000 [2023-01-28 07:55:03,148 INFO L136 LiptonReduction]: Total number of compositions: 137 [2023-01-28 07:55:03,158 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-28 07:55:03,163 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;@2f4cff23, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 07:55:03,163 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-01-28 07:55:03,166 INFO L130 PetriNetUnfolder]: 3/16 cut-off events. [2023-01-28 07:55:03,166 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 07:55:03,166 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 07:55:03,167 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-01-28 07:55:03,167 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-01-28 07:55:03,171 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 07:55:03,171 INFO L85 PathProgramCache]: Analyzing trace with hash 21768335, now seen corresponding path program 1 times [2023-01-28 07:55:03,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 07:55:03,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766710736] [2023-01-28 07:55:03,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:55:03,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 07:55:03,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 07:55:03,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 07:55:03,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 07:55:03,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766710736] [2023-01-28 07:55:03,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766710736] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 07:55:03,344 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 07:55:03,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-28 07:55:03,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89278723] [2023-01-28 07:55:03,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 07:55:03,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 07:55:03,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 07:55:03,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 07:55:03,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-28 07:55:03,375 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 321 [2023-01-28 07:55:03,378 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 75 transitions, 155 flow. Second operand has 3 states, 3 states have (on average 145.33333333333334) internal successors, (436), 3 states have internal predecessors, (436), 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 07:55:03,378 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 07:55:03,378 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 321 [2023-01-28 07:55:03,378 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 07:55:03,517 INFO L130 PetriNetUnfolder]: 399/884 cut-off events. [2023-01-28 07:55:03,517 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 07:55:03,519 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1704 conditions, 884 events. 399/884 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 4262 event pairs, 333 based on Foata normal form. 131/872 useless extension candidates. Maximal degree in co-relation 1689. Up to 796 conditions per place. [2023-01-28 07:55:03,522 INFO L137 encePairwiseOnDemand]: 294/321 looper letters, 49 selfloop transitions, 2 changer transitions 8/66 dead transitions. [2023-01-28 07:55:03,522 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 66 transitions, 253 flow [2023-01-28 07:55:03,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-28 07:55:03,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-28 07:55:03,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 527 transitions. [2023-01-28 07:55:03,535 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5472481827622014 [2023-01-28 07:55:03,535 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 527 transitions. [2023-01-28 07:55:03,536 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 527 transitions. [2023-01-28 07:55:03,538 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 07:55:03,539 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 527 transitions. [2023-01-28 07:55:03,543 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 175.66666666666666) internal successors, (527), 3 states have internal predecessors, (527), 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 07:55:03,548 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 321.0) internal successors, (1284), 4 states have internal predecessors, (1284), 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 07:55:03,549 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 321.0) internal successors, (1284), 4 states have internal predecessors, (1284), 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 07:55:03,550 INFO L175 Difference]: Start difference. First operand has 54 places, 75 transitions, 155 flow. Second operand 3 states and 527 transitions. [2023-01-28 07:55:03,550 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 66 transitions, 253 flow [2023-01-28 07:55:03,553 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 66 transitions, 253 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-01-28 07:55:03,554 INFO L231 Difference]: Finished difference. Result has 55 places, 43 transitions, 97 flow [2023-01-28 07:55:03,556 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=321, PETRI_DIFFERENCE_MINUEND_FLOW=105, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=97, PETRI_PLACES=55, PETRI_TRANSITIONS=43} [2023-01-28 07:55:03,558 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 1 predicate places. [2023-01-28 07:55:03,559 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 43 transitions, 97 flow [2023-01-28 07:55:03,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 145.33333333333334) internal successors, (436), 3 states have internal predecessors, (436), 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 07:55:03,559 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 07:55:03,559 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-01-28 07:55:03,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-01-28 07:55:03,560 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-01-28 07:55:03,567 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 07:55:03,567 INFO L85 PathProgramCache]: Analyzing trace with hash -200444206, now seen corresponding path program 1 times [2023-01-28 07:55:03,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 07:55:03,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805848711] [2023-01-28 07:55:03,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:55:03,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 07:55:03,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 07:55:03,672 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 07:55:03,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 07:55:03,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805848711] [2023-01-28 07:55:03,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805848711] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 07:55:03,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844141262] [2023-01-28 07:55:03,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:55:03,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 07:55:03,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 07:55:03,675 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 07:55:03,684 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 07:55:03,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 07:55:03,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 3 conjunts are in the unsatisfiable core [2023-01-28 07:55:03,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 07:55:03,771 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 07:55:03,771 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 07:55:03,805 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 07:55:03,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1844141262] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 07:55:03,805 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 07:55:03,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-01-28 07:55:03,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762742674] [2023-01-28 07:55:03,806 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 07:55:03,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-01-28 07:55:03,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 07:55:03,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-01-28 07:55:03,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-01-28 07:55:03,808 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 321 [2023-01-28 07:55:03,809 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 43 transitions, 97 flow. Second operand has 7 states, 7 states have (on average 146.28571428571428) internal successors, (1024), 7 states have internal predecessors, (1024), 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 07:55:03,809 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 07:55:03,809 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 321 [2023-01-28 07:55:03,809 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 07:55:03,848 INFO L130 PetriNetUnfolder]: 30/87 cut-off events. [2023-01-28 07:55:03,848 INFO L131 PetriNetUnfolder]: For 29/29 co-relation queries the response was YES. [2023-01-28 07:55:03,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 207 conditions, 87 events. 30/87 cut-off events. For 29/29 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 134 event pairs, 14 based on Foata normal form. 16/103 useless extension candidates. Maximal degree in co-relation 193. Up to 62 conditions per place. [2023-01-28 07:55:03,849 INFO L137 encePairwiseOnDemand]: 318/321 looper letters, 0 selfloop transitions, 0 changer transitions 38/38 dead transitions. [2023-01-28 07:55:03,849 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 38 transitions, 155 flow [2023-01-28 07:55:03,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-01-28 07:55:03,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-01-28 07:55:03,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 612 transitions. [2023-01-28 07:55:03,851 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4766355140186916 [2023-01-28 07:55:03,851 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 612 transitions. [2023-01-28 07:55:03,851 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 612 transitions. [2023-01-28 07:55:03,851 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 07:55:03,851 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 612 transitions. [2023-01-28 07:55:03,852 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 153.0) internal successors, (612), 4 states have internal predecessors, (612), 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 07:55:03,854 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 321.0) internal successors, (1605), 5 states have internal predecessors, (1605), 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 07:55:03,855 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 321.0) internal successors, (1605), 5 states have internal predecessors, (1605), 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 07:55:03,855 INFO L175 Difference]: Start difference. First operand has 55 places, 43 transitions, 97 flow. Second operand 4 states and 612 transitions. [2023-01-28 07:55:03,855 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 38 transitions, 155 flow [2023-01-28 07:55:03,855 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 38 transitions, 149 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-01-28 07:55:03,856 INFO L231 Difference]: Finished difference. Result has 28 places, 0 transitions, 0 flow [2023-01-28 07:55:03,856 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=321, PETRI_DIFFERENCE_MINUEND_FLOW=47, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=28, PETRI_TRANSITIONS=0} [2023-01-28 07:55:03,856 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, -26 predicate places. [2023-01-28 07:55:03,856 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 0 transitions, 0 flow [2023-01-28 07:55:03,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 146.28571428571428) internal successors, (1024), 7 states have internal predecessors, (1024), 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 07:55:03,859 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION (3 of 4 remaining) [2023-01-28 07:55:03,859 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-01-28 07:55:03,859 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2023-01-28 07:55:03,859 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2023-01-28 07:55:03,867 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-01-28 07:55:04,064 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 07:55:04,065 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-01-28 07:55:04,067 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE,SAFE (1/2) [2023-01-28 07:55:04,069 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 158 places, 184 transitions, 376 flow [2023-01-28 07:55:04,082 INFO L130 PetriNetUnfolder]: 45/269 cut-off events. [2023-01-28 07:55:04,082 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-01-28 07:55:04,083 INFO L83 FinitePrefix]: Finished finitePrefix Result has 275 conditions, 269 events. 45/269 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1001 event pairs, 0 based on Foata normal form. 0/213 useless extension candidates. Maximal degree in co-relation 143. Up to 6 conditions per place. [2023-01-28 07:55:04,083 INFO L82 GeneralOperation]: Start removeDead. Operand has 158 places, 184 transitions, 376 flow [2023-01-28 07:55:04,084 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 154 places, 179 transitions, 363 flow [2023-01-28 07:55:04,084 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 07:55:04,084 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 154 places, 179 transitions, 363 flow [2023-01-28 07:55:04,085 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 154 places, 179 transitions, 363 flow [2023-01-28 07:55:04,085 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 154 places, 179 transitions, 363 flow [2023-01-28 07:55:04,099 INFO L130 PetriNetUnfolder]: 44/264 cut-off events. [2023-01-28 07:55:04,100 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 07:55:04,101 INFO L83 FinitePrefix]: Finished finitePrefix Result has 269 conditions, 264 events. 44/264 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 985 event pairs, 0 based on Foata normal form. 0/208 useless extension candidates. Maximal degree in co-relation 143. Up to 6 conditions per place. [2023-01-28 07:55:04,105 INFO L119 LiptonReduction]: Number of co-enabled transitions 9646 [2023-01-28 07:55:06,641 INFO L134 LiptonReduction]: Checked pairs total: 22732 [2023-01-28 07:55:06,642 INFO L136 LiptonReduction]: Total number of compositions: 142 [2023-01-28 07:55:06,656 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-01-28 07:55:06,659 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;@2f4cff23, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 07:55:06,659 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-01-28 07:55:06,661 INFO L130 PetriNetUnfolder]: 3/24 cut-off events. [2023-01-28 07:55:06,661 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 07:55:06,661 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 07:55:06,662 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-01-28 07:55:06,662 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 07:55:06,663 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 07:55:06,663 INFO L85 PathProgramCache]: Analyzing trace with hash -660859190, now seen corresponding path program 1 times [2023-01-28 07:55:06,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 07:55:06,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917250821] [2023-01-28 07:55:06,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:55:06,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 07:55:06,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 07:55:06,695 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-28 07:55:06,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 07:55:06,715 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-28 07:55:06,716 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-28 07:55:06,716 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-01-28 07:55:06,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-01-28 07:55:06,716 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-01-28 07:55:06,717 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-01-28 07:55:06,717 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-28 07:55:06,717 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-01-28 07:55:06,736 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-01-28 07:55:06,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 202 places, 239 transitions, 496 flow [2023-01-28 07:55:06,765 INFO L130 PetriNetUnfolder]: 76/433 cut-off events. [2023-01-28 07:55:06,766 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-01-28 07:55:06,767 INFO L83 FinitePrefix]: Finished finitePrefix Result has 447 conditions, 433 events. 76/433 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1832 event pairs, 0 based on Foata normal form. 0/341 useless extension candidates. Maximal degree in co-relation 271. Up to 9 conditions per place. [2023-01-28 07:55:06,767 INFO L82 GeneralOperation]: Start removeDead. Operand has 202 places, 239 transitions, 496 flow [2023-01-28 07:55:06,770 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 202 places, 239 transitions, 496 flow [2023-01-28 07:55:06,770 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 07:55:06,770 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 202 places, 239 transitions, 496 flow [2023-01-28 07:55:06,771 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 202 places, 239 transitions, 496 flow [2023-01-28 07:55:06,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 202 places, 239 transitions, 496 flow [2023-01-28 07:55:06,803 INFO L130 PetriNetUnfolder]: 76/433 cut-off events. [2023-01-28 07:55:06,804 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-01-28 07:55:06,806 INFO L83 FinitePrefix]: Finished finitePrefix Result has 447 conditions, 433 events. 76/433 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1832 event pairs, 0 based on Foata normal form. 0/341 useless extension candidates. Maximal degree in co-relation 271. Up to 9 conditions per place. [2023-01-28 07:55:06,818 INFO L119 LiptonReduction]: Number of co-enabled transitions 26076 [2023-01-28 07:55:09,261 INFO L134 LiptonReduction]: Checked pairs total: 72714 [2023-01-28 07:55:09,262 INFO L136 LiptonReduction]: Total number of compositions: 162 [2023-01-28 07:55:09,263 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-28 07:55:09,264 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;@2f4cff23, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 07:55:09,264 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-01-28 07:55:09,265 INFO L130 PetriNetUnfolder]: 3/16 cut-off events. [2023-01-28 07:55:09,265 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 07:55:09,265 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 07:55:09,265 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-01-28 07:55:09,266 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-01-28 07:55:09,266 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 07:55:09,266 INFO L85 PathProgramCache]: Analyzing trace with hash 40176146, now seen corresponding path program 1 times [2023-01-28 07:55:09,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 07:55:09,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735999237] [2023-01-28 07:55:09,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:55:09,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 07:55:09,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 07:55:09,305 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 07:55:09,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 07:55:09,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735999237] [2023-01-28 07:55:09,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735999237] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 07:55:09,309 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 07:55:09,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-28 07:55:09,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756262299] [2023-01-28 07:55:09,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 07:55:09,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 07:55:09,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 07:55:09,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 07:55:09,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-28 07:55:09,310 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 401 [2023-01-28 07:55:09,311 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 119 transitions, 256 flow. Second operand has 3 states, 3 states have (on average 186.33333333333334) internal successors, (559), 3 states have internal predecessors, (559), 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 07:55:09,311 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 07:55:09,311 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 401 [2023-01-28 07:55:09,311 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 07:55:10,743 INFO L130 PetriNetUnfolder]: 13704/23220 cut-off events. [2023-01-28 07:55:10,743 INFO L131 PetriNetUnfolder]: For 81/81 co-relation queries the response was YES. [2023-01-28 07:55:10,762 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44433 conditions, 23220 events. 13704/23220 cut-off events. For 81/81 co-relation queries the response was YES. Maximal size of possible extension queue 495. Compared 172327 event pairs, 12690 based on Foata normal form. 5540/26053 useless extension candidates. Maximal degree in co-relation 37055. Up to 21102 conditions per place. [2023-01-28 07:55:10,832 INFO L137 encePairwiseOnDemand]: 363/401 looper letters, 68 selfloop transitions, 2 changer transitions 11/99 dead transitions. [2023-01-28 07:55:10,832 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 99 transitions, 374 flow [2023-01-28 07:55:10,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-28 07:55:10,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-28 07:55:10,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 682 transitions. [2023-01-28 07:55:10,834 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5669160432252701 [2023-01-28 07:55:10,834 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 682 transitions. [2023-01-28 07:55:10,834 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 682 transitions. [2023-01-28 07:55:10,834 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 07:55:10,834 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 682 transitions. [2023-01-28 07:55:10,836 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 227.33333333333334) internal successors, (682), 3 states have internal predecessors, (682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:55:10,838 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 401.0) internal successors, (1604), 4 states have internal predecessors, (1604), 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 07:55:10,838 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 401.0) internal successors, (1604), 4 states have internal predecessors, (1604), 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 07:55:10,839 INFO L175 Difference]: Start difference. First operand has 86 places, 119 transitions, 256 flow. Second operand 3 states and 682 transitions. [2023-01-28 07:55:10,839 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 99 transitions, 374 flow [2023-01-28 07:55:10,841 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 99 transitions, 374 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-01-28 07:55:10,843 INFO L231 Difference]: Finished difference. Result has 87 places, 72 transitions, 162 flow [2023-01-28 07:55:10,843 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=401, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=162, PETRI_PLACES=87, PETRI_TRANSITIONS=72} [2023-01-28 07:55:10,844 INFO L281 CegarLoopForPetriNet]: 86 programPoint places, 1 predicate places. [2023-01-28 07:55:10,845 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 72 transitions, 162 flow [2023-01-28 07:55:10,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 186.33333333333334) internal successors, (559), 3 states have internal predecessors, (559), 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 07:55:10,845 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 07:55:10,846 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 07:55:10,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-01-28 07:55:10,848 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-01-28 07:55:10,848 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 07:55:10,848 INFO L85 PathProgramCache]: Analyzing trace with hash -820951602, now seen corresponding path program 1 times [2023-01-28 07:55:10,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 07:55:10,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922404181] [2023-01-28 07:55:10,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:55:10,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 07:55:10,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 07:55:10,892 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 07:55:10,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 07:55:10,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922404181] [2023-01-28 07:55:10,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922404181] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 07:55:10,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588315388] [2023-01-28 07:55:10,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:55:10,893 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 07:55:10,893 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 07:55:10,894 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 07:55:10,896 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 07:55:10,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 07:55:10,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 3 conjunts are in the unsatisfiable core [2023-01-28 07:55:10,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 07:55:10,960 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 07:55:10,960 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 07:55:10,975 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 07:55:10,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1588315388] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 07:55:10,976 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 07:55:10,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-01-28 07:55:10,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558709554] [2023-01-28 07:55:10,976 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 07:55:10,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-01-28 07:55:10,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 07:55:10,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-01-28 07:55:10,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-01-28 07:55:10,978 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 401 [2023-01-28 07:55:10,979 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 72 transitions, 162 flow. Second operand has 7 states, 7 states have (on average 187.28571428571428) internal successors, (1311), 7 states have internal predecessors, (1311), 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 07:55:10,979 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 07:55:10,979 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 401 [2023-01-28 07:55:10,979 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 07:55:11,201 INFO L130 PetriNetUnfolder]: 1230/2166 cut-off events. [2023-01-28 07:55:11,202 INFO L131 PetriNetUnfolder]: For 328/328 co-relation queries the response was YES. [2023-01-28 07:55:11,204 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4559 conditions, 2166 events. 1230/2166 cut-off events. For 328/328 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 11621 event pairs, 238 based on Foata normal form. 272/2430 useless extension candidates. Maximal degree in co-relation 4159. Up to 1472 conditions per place. [2023-01-28 07:55:11,205 INFO L137 encePairwiseOnDemand]: 398/401 looper letters, 0 selfloop transitions, 0 changer transitions 98/98 dead transitions. [2023-01-28 07:55:11,206 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 98 transitions, 378 flow [2023-01-28 07:55:11,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-28 07:55:11,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-28 07:55:11,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1010 transitions. [2023-01-28 07:55:11,208 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5037406483790524 [2023-01-28 07:55:11,208 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1010 transitions. [2023-01-28 07:55:11,209 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1010 transitions. [2023-01-28 07:55:11,209 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 07:55:11,209 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1010 transitions. [2023-01-28 07:55:11,211 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 202.0) internal successors, (1010), 5 states have internal predecessors, (1010), 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 07:55:11,214 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 401.0) internal successors, (2406), 6 states have internal predecessors, (2406), 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 07:55:11,215 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 401.0) internal successors, (2406), 6 states have internal predecessors, (2406), 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 07:55:11,215 INFO L175 Difference]: Start difference. First operand has 87 places, 72 transitions, 162 flow. Second operand 5 states and 1010 transitions. [2023-01-28 07:55:11,215 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 98 transitions, 378 flow [2023-01-28 07:55:11,217 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 98 transitions, 376 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-01-28 07:55:11,218 INFO L231 Difference]: Finished difference. Result has 61 places, 0 transitions, 0 flow [2023-01-28 07:55:11,218 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=401, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=0, PETRI_PLACES=61, PETRI_TRANSITIONS=0} [2023-01-28 07:55:11,220 INFO L281 CegarLoopForPetriNet]: 86 programPoint places, -25 predicate places. [2023-01-28 07:55:11,220 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 0 transitions, 0 flow [2023-01-28 07:55:11,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 187.28571428571428) internal successors, (1311), 7 states have internal predecessors, (1311), 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 07:55:11,221 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION (3 of 4 remaining) [2023-01-28 07:55:11,221 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-01-28 07:55:11,221 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2023-01-28 07:55:11,222 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2023-01-28 07:55:11,229 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-01-28 07:55:11,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 07:55:11,427 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-01-28 07:55:11,428 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE,SAFE (1/2) [2023-01-28 07:55:11,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 202 places, 239 transitions, 496 flow [2023-01-28 07:55:11,464 INFO L130 PetriNetUnfolder]: 76/433 cut-off events. [2023-01-28 07:55:11,465 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-01-28 07:55:11,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 447 conditions, 433 events. 76/433 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1832 event pairs, 0 based on Foata normal form. 0/341 useless extension candidates. Maximal degree in co-relation 271. Up to 9 conditions per place. [2023-01-28 07:55:11,466 INFO L82 GeneralOperation]: Start removeDead. Operand has 202 places, 239 transitions, 496 flow [2023-01-28 07:55:11,468 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 202 places, 239 transitions, 496 flow [2023-01-28 07:55:11,468 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 07:55:11,468 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 202 places, 239 transitions, 496 flow [2023-01-28 07:55:11,468 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 202 places, 239 transitions, 496 flow [2023-01-28 07:55:11,468 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 202 places, 239 transitions, 496 flow [2023-01-28 07:55:11,498 INFO L130 PetriNetUnfolder]: 76/433 cut-off events. [2023-01-28 07:55:11,498 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-01-28 07:55:11,500 INFO L83 FinitePrefix]: Finished finitePrefix Result has 447 conditions, 433 events. 76/433 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1832 event pairs, 0 based on Foata normal form. 0/341 useless extension candidates. Maximal degree in co-relation 271. Up to 9 conditions per place. [2023-01-28 07:55:11,507 INFO L119 LiptonReduction]: Number of co-enabled transitions 26076 [2023-01-28 07:55:14,151 INFO L134 LiptonReduction]: Checked pairs total: 81872 [2023-01-28 07:55:14,152 INFO L136 LiptonReduction]: Total number of compositions: 162 [2023-01-28 07:55:14,156 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-01-28 07:55:14,157 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;@2f4cff23, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 07:55:14,159 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-01-28 07:55:14,164 INFO L130 PetriNetUnfolder]: 31/120 cut-off events. [2023-01-28 07:55:14,164 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-28 07:55:14,164 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 07:55:14,164 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-01-28 07:55:14,164 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 07:55:14,164 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 07:55:14,164 INFO L85 PathProgramCache]: Analyzing trace with hash 1759899425, now seen corresponding path program 1 times [2023-01-28 07:55:14,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 07:55:14,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502215254] [2023-01-28 07:55:14,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:55:14,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 07:55:14,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 07:55:14,182 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-28 07:55:14,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 07:55:14,198 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-28 07:55:14,198 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-28 07:55:14,198 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-01-28 07:55:14,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-01-28 07:55:14,199 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-01-28 07:55:14,199 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-01-28 07:55:14,199 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-28 07:55:14,200 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-01-28 07:55:14,223 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-01-28 07:55:14,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 246 places, 294 transitions, 618 flow [2023-01-28 07:55:14,267 INFO L130 PetriNetUnfolder]: 112/628 cut-off events. [2023-01-28 07:55:14,267 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-01-28 07:55:14,271 INFO L83 FinitePrefix]: Finished finitePrefix Result has 656 conditions, 628 events. 112/628 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 2789 event pairs, 1 based on Foata normal form. 0/496 useless extension candidates. Maximal degree in co-relation 441. Up to 16 conditions per place. [2023-01-28 07:55:14,272 INFO L82 GeneralOperation]: Start removeDead. Operand has 246 places, 294 transitions, 618 flow [2023-01-28 07:55:14,275 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 246 places, 294 transitions, 618 flow [2023-01-28 07:55:14,275 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 07:55:14,276 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 246 places, 294 transitions, 618 flow [2023-01-28 07:55:14,276 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 246 places, 294 transitions, 618 flow [2023-01-28 07:55:14,276 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 246 places, 294 transitions, 618 flow [2023-01-28 07:55:14,316 INFO L130 PetriNetUnfolder]: 112/628 cut-off events. [2023-01-28 07:55:14,317 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-01-28 07:55:14,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 656 conditions, 628 events. 112/628 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 2789 event pairs, 1 based on Foata normal form. 0/496 useless extension candidates. Maximal degree in co-relation 441. Up to 16 conditions per place. [2023-01-28 07:55:14,332 INFO L119 LiptonReduction]: Number of co-enabled transitions 48018 [2023-01-28 07:55:17,125 INFO L134 LiptonReduction]: Checked pairs total: 160626 [2023-01-28 07:55:17,125 INFO L136 LiptonReduction]: Total number of compositions: 188 [2023-01-28 07:55:17,127 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-28 07:55:17,127 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;@2f4cff23, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 07:55:17,127 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-01-28 07:55:17,128 INFO L130 PetriNetUnfolder]: 3/16 cut-off events. [2023-01-28 07:55:17,128 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 07:55:17,128 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 07:55:17,128 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-01-28 07:55:17,129 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-01-28 07:55:17,129 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 07:55:17,129 INFO L85 PathProgramCache]: Analyzing trace with hash 61693138, now seen corresponding path program 1 times [2023-01-28 07:55:17,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 07:55:17,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863096274] [2023-01-28 07:55:17,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:55:17,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 07:55:17,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 07:55:17,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 07:55:17,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 07:55:17,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863096274] [2023-01-28 07:55:17,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863096274] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 07:55:17,161 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 07:55:17,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-28 07:55:17,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84204858] [2023-01-28 07:55:17,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 07:55:17,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 07:55:17,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 07:55:17,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 07:55:17,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-28 07:55:17,162 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 226 out of 482 [2023-01-28 07:55:17,163 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 154 transitions, 338 flow. Second operand has 3 states, 3 states have (on average 227.33333333333334) internal successors, (682), 3 states have internal predecessors, (682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:55:17,163 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 07:55:17,163 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 226 of 482 [2023-01-28 07:55:17,163 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 07:55:44,775 INFO L130 PetriNetUnfolder]: 319220/469118 cut-off events. [2023-01-28 07:55:44,776 INFO L131 PetriNetUnfolder]: For 2786/2786 co-relation queries the response was YES. [2023-01-28 07:55:45,353 INFO L83 FinitePrefix]: Finished finitePrefix Result has 905517 conditions, 469118 events. 319220/469118 cut-off events. For 2786/2786 co-relation queries the response was YES. Maximal size of possible extension queue 7451. Compared 4093185 event pairs, 203665 based on Foata normal form. 88045/518970 useless extension candidates. Maximal degree in co-relation 42806. Up to 434261 conditions per place. [2023-01-28 07:55:46,703 INFO L137 encePairwiseOnDemand]: 433/482 looper letters, 84 selfloop transitions, 2 changer transitions 11/123 dead transitions. [2023-01-28 07:55:46,703 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 123 transitions, 466 flow [2023-01-28 07:55:46,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-28 07:55:46,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-28 07:55:46,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 832 transitions. [2023-01-28 07:55:46,707 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5753803596127247 [2023-01-28 07:55:46,707 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 832 transitions. [2023-01-28 07:55:46,707 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 832 transitions. [2023-01-28 07:55:46,708 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 07:55:46,708 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 832 transitions. [2023-01-28 07:55:46,709 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 277.3333333333333) internal successors, (832), 3 states have internal predecessors, (832), 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 07:55:46,711 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 482.0) internal successors, (1928), 4 states have internal predecessors, (1928), 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 07:55:46,712 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 482.0) internal successors, (1928), 4 states have internal predecessors, (1928), 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 07:55:46,712 INFO L175 Difference]: Start difference. First operand has 111 places, 154 transitions, 338 flow. Second operand 3 states and 832 transitions. [2023-01-28 07:55:46,712 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 123 transitions, 466 flow [2023-01-28 07:55:46,720 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 123 transitions, 466 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-01-28 07:55:46,721 INFO L231 Difference]: Finished difference. Result has 112 places, 96 transitions, 217 flow [2023-01-28 07:55:46,722 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=482, PETRI_DIFFERENCE_MINUEND_FLOW=242, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=217, PETRI_PLACES=112, PETRI_TRANSITIONS=96} [2023-01-28 07:55:46,722 INFO L281 CegarLoopForPetriNet]: 111 programPoint places, 1 predicate places. [2023-01-28 07:55:46,723 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 96 transitions, 217 flow [2023-01-28 07:55:46,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 227.33333333333334) internal successors, (682), 3 states have internal predecessors, (682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:55:46,723 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 07:55:46,723 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 07:55:46,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-01-28 07:55:46,723 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-01-28 07:55:46,723 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 07:55:46,724 INFO L85 PathProgramCache]: Analyzing trace with hash -375081470, now seen corresponding path program 1 times [2023-01-28 07:55:46,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 07:55:46,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990356000] [2023-01-28 07:55:46,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:55:46,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 07:55:46,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 07:55:46,760 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 07:55:46,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 07:55:46,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990356000] [2023-01-28 07:55:46,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990356000] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 07:55:46,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41365109] [2023-01-28 07:55:46,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:55:46,761 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 07:55:46,761 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 07:55:46,762 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 07:55:46,764 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 07:55:46,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 07:55:46,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 3 conjunts are in the unsatisfiable core [2023-01-28 07:55:46,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 07:55:46,832 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 07:55:46,833 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 07:55:46,845 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 07:55:46,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [41365109] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 07:55:46,845 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 07:55:46,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-01-28 07:55:46,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316982595] [2023-01-28 07:55:46,846 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 07:55:46,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-01-28 07:55:46,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 07:55:46,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-01-28 07:55:46,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-01-28 07:55:46,848 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 226 out of 482 [2023-01-28 07:55:46,850 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 96 transitions, 217 flow. Second operand has 7 states, 7 states have (on average 228.28571428571428) internal successors, (1598), 7 states have internal predecessors, (1598), 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 07:55:46,850 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 07:55:46,850 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 226 of 482 [2023-01-28 07:55:46,850 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 07:55:49,215 INFO L130 PetriNetUnfolder]: 31732/46541 cut-off events. [2023-01-28 07:55:49,215 INFO L131 PetriNetUnfolder]: For 5112/5112 co-relation queries the response was YES. [2023-01-28 07:55:49,271 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96653 conditions, 46541 events. 31732/46541 cut-off events. For 5112/5112 co-relation queries the response was YES. Maximal size of possible extension queue 867. Compared 322132 event pairs, 224 based on Foata normal form. 4336/50870 useless extension candidates. Maximal degree in co-relation 90400. Up to 31106 conditions per place. [2023-01-28 07:55:49,297 INFO L137 encePairwiseOnDemand]: 479/482 looper letters, 0 selfloop transitions, 0 changer transitions 167/167 dead transitions. [2023-01-28 07:55:49,297 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 167 transitions, 649 flow [2023-01-28 07:55:49,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-28 07:55:49,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-28 07:55:49,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1504 transitions. [2023-01-28 07:55:49,300 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5200553250345782 [2023-01-28 07:55:49,300 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1504 transitions. [2023-01-28 07:55:49,300 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1504 transitions. [2023-01-28 07:55:49,300 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 07:55:49,300 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1504 transitions. [2023-01-28 07:55:49,302 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 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 07:55:49,305 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 482.0) internal successors, (3374), 7 states have internal predecessors, (3374), 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 07:55:49,306 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 482.0) internal successors, (3374), 7 states have internal predecessors, (3374), 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 07:55:49,306 INFO L175 Difference]: Start difference. First operand has 112 places, 96 transitions, 217 flow. Second operand 6 states and 1504 transitions. [2023-01-28 07:55:49,306 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 167 transitions, 649 flow [2023-01-28 07:55:49,307 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 167 transitions, 645 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-01-28 07:55:49,308 INFO L231 Difference]: Finished difference. Result has 87 places, 0 transitions, 0 flow [2023-01-28 07:55:49,308 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=482, PETRI_DIFFERENCE_MINUEND_FLOW=167, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=0, PETRI_PLACES=87, PETRI_TRANSITIONS=0} [2023-01-28 07:55:49,309 INFO L281 CegarLoopForPetriNet]: 111 programPoint places, -24 predicate places. [2023-01-28 07:55:49,309 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 0 transitions, 0 flow [2023-01-28 07:55:49,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 228.28571428571428) internal successors, (1598), 7 states have internal predecessors, (1598), 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 07:55:49,309 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION (3 of 4 remaining) [2023-01-28 07:55:49,309 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-01-28 07:55:49,309 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2023-01-28 07:55:49,309 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2023-01-28 07:55:49,317 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 07:55:49,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 07:55:49,515 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-01-28 07:55:49,516 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE,SAFE (1/2) [2023-01-28 07:55:49,518 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 246 places, 294 transitions, 618 flow [2023-01-28 07:55:49,552 INFO L130 PetriNetUnfolder]: 112/628 cut-off events. [2023-01-28 07:55:49,553 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-01-28 07:55:49,556 INFO L83 FinitePrefix]: Finished finitePrefix Result has 656 conditions, 628 events. 112/628 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 2789 event pairs, 1 based on Foata normal form. 0/496 useless extension candidates. Maximal degree in co-relation 441. Up to 16 conditions per place. [2023-01-28 07:55:49,556 INFO L82 GeneralOperation]: Start removeDead. Operand has 246 places, 294 transitions, 618 flow [2023-01-28 07:55:49,558 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 246 places, 294 transitions, 618 flow [2023-01-28 07:55:49,558 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 07:55:49,558 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 246 places, 294 transitions, 618 flow [2023-01-28 07:55:49,558 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 246 places, 294 transitions, 618 flow [2023-01-28 07:55:49,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 246 places, 294 transitions, 618 flow [2023-01-28 07:55:49,720 INFO L130 PetriNetUnfolder]: 112/628 cut-off events. [2023-01-28 07:55:49,720 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-01-28 07:55:49,722 INFO L83 FinitePrefix]: Finished finitePrefix Result has 656 conditions, 628 events. 112/628 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 2789 event pairs, 1 based on Foata normal form. 0/496 useless extension candidates. Maximal degree in co-relation 441. Up to 16 conditions per place. [2023-01-28 07:55:49,733 INFO L119 LiptonReduction]: Number of co-enabled transitions 48018 [2023-01-28 07:55:52,334 INFO L134 LiptonReduction]: Checked pairs total: 160161 [2023-01-28 07:55:52,334 INFO L136 LiptonReduction]: Total number of compositions: 187 [2023-01-28 07:55:52,335 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-01-28 07:55:52,335 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;@2f4cff23, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 07:55:52,335 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-01-28 07:55:52,343 INFO L130 PetriNetUnfolder]: 55/195 cut-off events. [2023-01-28 07:55:52,343 INFO L131 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2023-01-28 07:55:52,343 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 07:55:52,343 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-01-28 07:55:52,343 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 07:55:52,343 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 07:55:52,343 INFO L85 PathProgramCache]: Analyzing trace with hash -5391705, now seen corresponding path program 1 times [2023-01-28 07:55:52,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 07:55:52,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928318407] [2023-01-28 07:55:52,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:55:52,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 07:55:52,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 07:55:52,353 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-28 07:55:52,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 07:55:52,362 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-28 07:55:52,363 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-28 07:55:52,363 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-01-28 07:55:52,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-01-28 07:55:52,363 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-01-28 07:55:52,363 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-01-28 07:55:52,363 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-28 07:55:52,363 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-01-28 07:55:52,379 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-01-28 07:55:52,381 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 290 places, 349 transitions, 742 flow [2023-01-28 07:55:52,447 INFO L130 PetriNetUnfolder]: 160/887 cut-off events. [2023-01-28 07:55:52,447 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-01-28 07:55:52,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 942 conditions, 887 events. 160/887 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 4176 event pairs, 6 based on Foata normal form. 0/707 useless extension candidates. Maximal degree in co-relation 648. Up to 32 conditions per place. [2023-01-28 07:55:52,455 INFO L82 GeneralOperation]: Start removeDead. Operand has 290 places, 349 transitions, 742 flow [2023-01-28 07:55:52,459 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 290 places, 349 transitions, 742 flow [2023-01-28 07:55:52,459 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 07:55:52,460 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 290 places, 349 transitions, 742 flow [2023-01-28 07:55:52,460 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 290 places, 349 transitions, 742 flow [2023-01-28 07:55:52,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 290 places, 349 transitions, 742 flow [2023-01-28 07:55:52,525 INFO L130 PetriNetUnfolder]: 160/887 cut-off events. [2023-01-28 07:55:52,525 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-01-28 07:55:52,533 INFO L83 FinitePrefix]: Finished finitePrefix Result has 942 conditions, 887 events. 160/887 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 4176 event pairs, 6 based on Foata normal form. 0/707 useless extension candidates. Maximal degree in co-relation 648. Up to 32 conditions per place. [2023-01-28 07:55:52,572 INFO L119 LiptonReduction]: Number of co-enabled transitions 75896 [2023-01-28 07:55:55,384 INFO L134 LiptonReduction]: Checked pairs total: 231887 [2023-01-28 07:55:55,384 INFO L136 LiptonReduction]: Total number of compositions: 217 [2023-01-28 07:55:55,388 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-28 07:55:55,388 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;@2f4cff23, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 07:55:55,388 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-01-28 07:55:55,389 INFO L130 PetriNetUnfolder]: 2/13 cut-off events. [2023-01-28 07:55:55,389 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 07:55:55,390 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 07:55:55,390 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-01-28 07:55:55,390 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-01-28 07:55:55,390 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 07:55:55,390 INFO L85 PathProgramCache]: Analyzing trace with hash 86564223, now seen corresponding path program 1 times [2023-01-28 07:55:55,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 07:55:55,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758979484] [2023-01-28 07:55:55,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:55:55,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 07:55:55,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 07:55:55,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 07:55:55,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 07:55:55,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758979484] [2023-01-28 07:55:55,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758979484] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 07:55:55,414 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 07:55:55,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-28 07:55:55,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607651488] [2023-01-28 07:55:55,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 07:55:55,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 07:55:55,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 07:55:55,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 07:55:55,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-28 07:55:55,416 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 267 out of 566 [2023-01-28 07:55:55,416 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 189 transitions, 422 flow. Second operand has 3 states, 3 states have (on average 268.3333333333333) internal successors, (805), 3 states have internal predecessors, (805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:55:55,416 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 07:55:55,416 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 267 of 566 [2023-01-28 07:55:55,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand