/usr/bin/java -Xmx8000000000 -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-SemanticLbe.epf --traceabstraction.use.on-demand.petri.net.difference true --traceabstraction.size.reduction.to.apply.after.petri.net.difference REMOVE_DEAD -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.repeated-lipton-a802222-m [2022-12-12 21:59:41,033 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-12 21:59:41,035 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-12 21:59:41,072 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-12 21:59:41,074 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-12 21:59:41,077 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-12 21:59:41,080 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-12 21:59:41,083 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-12 21:59:41,087 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-12 21:59:41,091 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-12 21:59:41,094 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-12 21:59:41,096 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-12 21:59:41,096 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-12 21:59:41,098 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-12 21:59:41,099 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-12 21:59:41,102 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-12 21:59:41,102 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-12 21:59:41,103 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-12 21:59:41,115 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-12 21:59:41,116 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-12 21:59:41,117 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-12 21:59:41,120 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-12 21:59:41,120 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-12 21:59:41,121 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-12 21:59:41,124 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-12 21:59:41,124 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-12 21:59:41,124 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-12 21:59:41,125 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-12 21:59:41,125 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-12 21:59:41,126 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-12 21:59:41,126 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-12 21:59:41,127 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-12 21:59:41,127 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-12 21:59:41,128 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-12 21:59:41,128 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-12 21:59:41,129 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-12 21:59:41,129 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-12 21:59:41,129 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-12 21:59:41,130 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-12 21:59:41,130 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-12 21:59:41,136 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-12 21:59:41,138 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-SemanticLbe.epf [2022-12-12 21:59:41,168 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-12 21:59:41,169 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-12 21:59:41,170 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-12 21:59:41,170 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-12 21:59:41,171 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-12 21:59:41,172 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-12 21:59:41,172 INFO L138 SettingsManager]: * Use SBE=true [2022-12-12 21:59:41,172 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-12 21:59:41,172 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-12 21:59:41,172 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-12 21:59:41,173 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-12 21:59:41,173 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-12 21:59:41,173 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-12 21:59:41,173 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-12 21:59:41,174 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-12 21:59:41,174 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-12 21:59:41,174 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-12 21:59:41,174 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-12 21:59:41,174 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-12 21:59:41,175 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-12 21:59:41,175 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-12 21:59:41,180 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-12-12 21:59:41,180 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-12 21:59:41,181 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-12 21:59:41,181 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-12 21:59:41,182 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-12 21:59:41,182 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-12 21:59:41,182 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-12 21:59:41,182 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-12 21:59:41,182 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-12 21:59:41,182 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use on-demand Petri net difference -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Size reduction to apply after Petri net difference -> REMOVE_DEAD [2022-12-12 21:59:41,463 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-12 21:59:41,486 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-12 21:59:41,488 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-12 21:59:41,489 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-12 21:59:41,489 INFO L275 PluginConnector]: CDTParser initialized [2022-12-12 21:59:41,490 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-1.i [2022-12-12 21:59:42,528 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-12 21:59:42,844 INFO L351 CDTParser]: Found 1 translation units. [2022-12-12 21:59:42,845 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-1.i [2022-12-12 21:59:42,860 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/245b0133c/105dd817d6fd4ea8a4b73e39dbeb6d61/FLAG31c3d9ea8 [2022-12-12 21:59:42,873 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/245b0133c/105dd817d6fd4ea8a4b73e39dbeb6d61 [2022-12-12 21:59:42,876 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-12 21:59:42,877 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-12-12 21:59:42,877 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-12 21:59:42,877 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-12 21:59:42,879 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-12 21:59:42,879 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.12 09:59:42" (1/1) ... [2022-12-12 21:59:42,880 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b0357f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 09:59:42, skipping insertion in model container [2022-12-12 21:59:42,880 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.12 09:59:42" (1/1) ... [2022-12-12 21:59:42,885 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-12 21:59:42,937 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-12 21:59:43,082 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-1.i[820,833] [2022-12-12 21:59:43,457 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-12 21:59:43,466 INFO L203 MainTranslator]: Completed pre-run [2022-12-12 21:59:43,478 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-1.i[820,833] [2022-12-12 21:59:43,528 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-12 21:59:43,619 INFO L208 MainTranslator]: Completed translation [2022-12-12 21:59:43,620 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 09:59:43 WrapperNode [2022-12-12 21:59:43,621 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-12 21:59:43,623 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-12 21:59:43,623 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-12 21:59:43,623 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-12 21:59:43,630 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 09:59:43" (1/1) ... [2022-12-12 21:59:43,660 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 09:59:43" (1/1) ... [2022-12-12 21:59:43,684 INFO L138 Inliner]: procedures = 364, calls = 20, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 62 [2022-12-12 21:59:43,684 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-12 21:59:43,685 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-12 21:59:43,685 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-12 21:59:43,685 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-12 21:59:43,693 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 09:59:43" (1/1) ... [2022-12-12 21:59:43,693 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 09:59:43" (1/1) ... [2022-12-12 21:59:43,705 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 09:59:43" (1/1) ... [2022-12-12 21:59:43,706 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 09:59:43" (1/1) ... [2022-12-12 21:59:43,709 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 09:59:43" (1/1) ... [2022-12-12 21:59:43,712 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 09:59:43" (1/1) ... [2022-12-12 21:59:43,721 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 09:59:43" (1/1) ... [2022-12-12 21:59:43,722 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 09:59:43" (1/1) ... [2022-12-12 21:59:43,724 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-12 21:59:43,728 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-12 21:59:43,729 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-12 21:59:43,729 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-12 21:59:43,730 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 09:59:43" (1/1) ... [2022-12-12 21:59:43,734 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-12 21:59:43,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 21:59:43,760 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) [2022-12-12 21:59:43,790 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 [2022-12-12 21:59:43,808 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-12 21:59:43,809 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-12 21:59:43,809 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-12 21:59:43,809 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-12 21:59:43,809 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-12-12 21:59:43,809 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-12 21:59:43,809 INFO L130 BoogieDeclarations]: Found specification of procedure thread_function_mutex [2022-12-12 21:59:43,809 INFO L138 BoogieDeclarations]: Found implementation of procedure thread_function_mutex [2022-12-12 21:59:43,810 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-12 21:59:43,810 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-12 21:59:43,810 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-12 21:59:43,811 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2022-12-12 21:59:43,933 INFO L236 CfgBuilder]: Building ICFG [2022-12-12 21:59:43,934 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-12 21:59:44,112 INFO L277 CfgBuilder]: Performing block encoding [2022-12-12 21:59:44,121 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-12 21:59:44,121 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2022-12-12 21:59:44,123 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.12 09:59:44 BoogieIcfgContainer [2022-12-12 21:59:44,123 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-12 21:59:44,125 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-12 21:59:44,125 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-12 21:59:44,128 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-12 21:59:44,128 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.12 09:59:42" (1/3) ... [2022-12-12 21:59:44,129 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fe9707b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.12 09:59:44, skipping insertion in model container [2022-12-12 21:59:44,129 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 09:59:43" (2/3) ... [2022-12-12 21:59:44,129 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fe9707b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.12 09:59:44, skipping insertion in model container [2022-12-12 21:59:44,129 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.12 09:59:44" (3/3) ... [2022-12-12 21:59:44,130 INFO L112 eAbstractionObserver]: Analyzing ICFG pthread-demo-datarace-1.i [2022-12-12 21:59:44,146 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-12 21:59:44,146 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-12 21:59:44,146 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-12 21:59:44,212 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2022-12-12 21:59:44,241 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 83 places, 86 transitions, 180 flow [2022-12-12 21:59:44,281 INFO L130 PetriNetUnfolder]: 7/85 cut-off events. [2022-12-12 21:59:44,281 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-12 21:59:44,286 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90 conditions, 85 events. 7/85 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 82 event pairs, 0 based on Foata normal form. 0/77 useless extension candidates. Maximal degree in co-relation 38. Up to 2 conditions per place. [2022-12-12 21:59:44,286 INFO L82 GeneralOperation]: Start removeDead. Operand has 83 places, 86 transitions, 180 flow [2022-12-12 21:59:44,289 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 75 places, 77 transitions, 160 flow [2022-12-12 21:59:44,291 INFO L203 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-12 21:59:44,307 INFO L174 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 75 places, 77 transitions, 160 flow [2022-12-12 21:59:44,311 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 75 places, 77 transitions, 160 flow [2022-12-12 21:59:44,332 INFO L130 PetriNetUnfolder]: 6/77 cut-off events. [2022-12-12 21:59:44,333 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-12 21:59:44,334 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82 conditions, 77 events. 6/77 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 77 event pairs, 0 based on Foata normal form. 0/71 useless extension candidates. Maximal degree in co-relation 38. Up to 2 conditions per place. [2022-12-12 21:59:44,336 INFO L222 LiptonReduction]: Starting Lipton reduction on Petri net that has 75 places, 77 transitions, 160 flow [2022-12-12 21:59:44,336 INFO L226 LiptonReduction]: Number of co-enabled transitions 722 [2022-12-12 21:59:46,211 INFO L241 LiptonReduction]: Total number of compositions: 62 [2022-12-12 21:59:46,225 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-12 21:59:46,230 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;@5afcb912, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, Conditionality=CONDITIONAL_DISJUNCTIVE, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-12 21:59:46,231 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-12-12 21:59:46,234 INFO L130 PetriNetUnfolder]: 2/14 cut-off events. [2022-12-12 21:59:46,235 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-12 21:59:46,235 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 21:59:46,235 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 21:59:46,236 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 21:59:46,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 21:59:46,240 INFO L85 PathProgramCache]: Analyzing trace with hash 89472530, now seen corresponding path program 1 times [2022-12-12 21:59:46,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 21:59:46,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106678729] [2022-12-12 21:59:46,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 21:59:46,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 21:59:46,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 21:59:46,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 21:59:46,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 21:59:46,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106678729] [2022-12-12 21:59:46,475 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106678729] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 21:59:46,476 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-12 21:59:46,476 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-12 21:59:46,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012914833] [2022-12-12 21:59:46,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 21:59:46,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-12 21:59:46,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 21:59:46,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-12 21:59:46,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-12 21:59:46,505 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 15 [2022-12-12 21:59:46,506 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 17 places, 15 transitions, 36 flow. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 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) [2022-12-12 21:59:46,506 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 21:59:46,506 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 15 [2022-12-12 21:59:46,507 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 21:59:46,580 INFO L130 PetriNetUnfolder]: 41/86 cut-off events. [2022-12-12 21:59:46,580 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-12 21:59:46,581 INFO L83 FinitePrefix]: Finished finitePrefix Result has 176 conditions, 86 events. 41/86 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 206 event pairs, 15 based on Foata normal form. 0/72 useless extension candidates. Maximal degree in co-relation 162. Up to 53 conditions per place. [2022-12-12 21:59:46,583 INFO L137 encePairwiseOnDemand]: 12/15 looper letters, 20 selfloop transitions, 2 changer transitions 0/23 dead transitions. [2022-12-12 21:59:46,583 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 19 places, 23 transitions, 96 flow [2022-12-12 21:59:46,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-12 21:59:46,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-12 21:59:46,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 26 transitions. [2022-12-12 21:59:46,594 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.5777777777777777 [2022-12-12 21:59:46,598 INFO L295 CegarLoopForPetriNet]: 17 programPoint places, 2 predicate places. [2022-12-12 21:59:46,598 INFO L82 GeneralOperation]: Start removeDead. Operand has 19 places, 23 transitions, 96 flow [2022-12-12 21:59:46,600 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 19 places, 23 transitions, 96 flow [2022-12-12 21:59:46,601 INFO L495 AbstractCegarLoop]: Abstraction has has 19 places, 23 transitions, 96 flow [2022-12-12 21:59:46,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 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) [2022-12-12 21:59:46,602 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 21:59:46,602 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 21:59:46,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-12 21:59:46,602 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 21:59:46,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 21:59:46,605 INFO L85 PathProgramCache]: Analyzing trace with hash -683595234, now seen corresponding path program 1 times [2022-12-12 21:59:46,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 21:59:46,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072185129] [2022-12-12 21:59:46,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 21:59:46,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 21:59:46,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 21:59:46,724 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 21:59:46,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 21:59:46,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072185129] [2022-12-12 21:59:46,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072185129] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 21:59:46,726 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-12 21:59:46,726 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-12 21:59:46,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42648733] [2022-12-12 21:59:46,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 21:59:46,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-12 21:59:46,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 21:59:46,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-12 21:59:46,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-12 21:59:46,729 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 15 [2022-12-12 21:59:46,729 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 19 places, 23 transitions, 96 flow. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 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) [2022-12-12 21:59:46,729 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 21:59:46,729 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 15 [2022-12-12 21:59:46,729 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 21:59:46,778 INFO L130 PetriNetUnfolder]: 61/136 cut-off events. [2022-12-12 21:59:46,778 INFO L131 PetriNetUnfolder]: For 14/16 co-relation queries the response was YES. [2022-12-12 21:59:46,778 INFO L83 FinitePrefix]: Finished finitePrefix Result has 391 conditions, 136 events. 61/136 cut-off events. For 14/16 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 438 event pairs, 15 based on Foata normal form. 0/120 useless extension candidates. Maximal degree in co-relation 372. Up to 85 conditions per place. [2022-12-12 21:59:46,779 INFO L137 encePairwiseOnDemand]: 12/15 looper letters, 32 selfloop transitions, 4 changer transitions 0/37 dead transitions. [2022-12-12 21:59:46,780 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 21 places, 37 transitions, 224 flow [2022-12-12 21:59:46,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-12 21:59:46,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-12 21:59:46,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 26 transitions. [2022-12-12 21:59:46,781 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.5777777777777777 [2022-12-12 21:59:46,781 INFO L295 CegarLoopForPetriNet]: 17 programPoint places, 4 predicate places. [2022-12-12 21:59:46,781 INFO L82 GeneralOperation]: Start removeDead. Operand has 21 places, 37 transitions, 224 flow [2022-12-12 21:59:46,782 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 21 places, 37 transitions, 224 flow [2022-12-12 21:59:46,783 INFO L495 AbstractCegarLoop]: Abstraction has has 21 places, 37 transitions, 224 flow [2022-12-12 21:59:46,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 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) [2022-12-12 21:59:46,783 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 21:59:46,783 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 21:59:46,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-12 21:59:46,783 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 21:59:46,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 21:59:46,784 INFO L85 PathProgramCache]: Analyzing trace with hash -549513920, now seen corresponding path program 1 times [2022-12-12 21:59:46,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 21:59:46,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408483838] [2022-12-12 21:59:46,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 21:59:46,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 21:59:46,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 21:59:46,854 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 21:59:46,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 21:59:46,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408483838] [2022-12-12 21:59:46,855 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408483838] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 21:59:46,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957270616] [2022-12-12 21:59:46,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 21:59:46,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 21:59:46,855 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 21:59:46,859 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) [2022-12-12 21:59:46,910 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-12 21:59:47,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 21:59:47,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-12 21:59:47,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 21:59:47,076 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 21:59:47,076 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 21:59:47,117 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 21:59:47,118 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [957270616] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 21:59:47,118 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 21:59:47,118 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2022-12-12 21:59:47,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379170635] [2022-12-12 21:59:47,118 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 21:59:47,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-12 21:59:47,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 21:59:47,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-12 21:59:47,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-12-12 21:59:47,119 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 15 [2022-12-12 21:59:47,120 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 37 transitions, 224 flow. Second operand has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 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) [2022-12-12 21:59:47,120 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 21:59:47,120 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 15 [2022-12-12 21:59:47,120 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 21:59:47,357 INFO L130 PetriNetUnfolder]: 153/320 cut-off events. [2022-12-12 21:59:47,357 INFO L131 PetriNetUnfolder]: For 47/59 co-relation queries the response was YES. [2022-12-12 21:59:47,361 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1252 conditions, 320 events. 153/320 cut-off events. For 47/59 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1082 event pairs, 6 based on Foata normal form. 4/297 useless extension candidates. Maximal degree in co-relation 1228. Up to 245 conditions per place. [2022-12-12 21:59:47,366 INFO L137 encePairwiseOnDemand]: 8/15 looper letters, 68 selfloop transitions, 33 changer transitions 0/102 dead transitions. [2022-12-12 21:59:47,366 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 102 transitions, 816 flow [2022-12-12 21:59:47,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-12 21:59:47,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-12-12 21:59:47,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 131 transitions. [2022-12-12 21:59:47,370 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.5458333333333333 [2022-12-12 21:59:47,371 INFO L295 CegarLoopForPetriNet]: 17 programPoint places, 19 predicate places. [2022-12-12 21:59:47,371 INFO L82 GeneralOperation]: Start removeDead. Operand has 36 places, 102 transitions, 816 flow [2022-12-12 21:59:47,374 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 36 places, 102 transitions, 816 flow [2022-12-12 21:59:47,375 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 102 transitions, 816 flow [2022-12-12 21:59:47,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 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) [2022-12-12 21:59:47,376 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 21:59:47,376 INFO L214 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 21:59:47,387 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-12 21:59:47,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 21:59:47,584 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 21:59:47,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 21:59:47,584 INFO L85 PathProgramCache]: Analyzing trace with hash 1340245540, now seen corresponding path program 2 times [2022-12-12 21:59:47,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 21:59:47,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510029073] [2022-12-12 21:59:47,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 21:59:47,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 21:59:47,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 21:59:47,741 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-12 21:59:47,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 21:59:47,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510029073] [2022-12-12 21:59:47,741 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510029073] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 21:59:47,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196546068] [2022-12-12 21:59:47,742 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-12 21:59:47,742 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 21:59:47,742 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 21:59:47,743 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) [2022-12-12 21:59:47,746 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-12 21:59:47,840 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-12 21:59:47,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 21:59:47,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-12 21:59:47,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 21:59:47,896 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-12 21:59:47,896 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 21:59:47,957 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-12 21:59:47,957 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1196546068] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 21:59:47,957 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 21:59:47,957 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2022-12-12 21:59:47,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315290494] [2022-12-12 21:59:47,958 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 21:59:47,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-12 21:59:47,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 21:59:47,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-12 21:59:47,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2022-12-12 21:59:47,959 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 15 [2022-12-12 21:59:47,960 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 102 transitions, 816 flow. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 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) [2022-12-12 21:59:47,960 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 21:59:47,960 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 15 [2022-12-12 21:59:47,960 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 21:59:48,099 INFO L130 PetriNetUnfolder]: 286/612 cut-off events. [2022-12-12 21:59:48,099 INFO L131 PetriNetUnfolder]: For 235/239 co-relation queries the response was YES. [2022-12-12 21:59:48,100 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2917 conditions, 612 events. 286/612 cut-off events. For 235/239 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 2524 event pairs, 4 based on Foata normal form. 0/578 useless extension candidates. Maximal degree in co-relation 2888. Up to 499 conditions per place. [2022-12-12 21:59:48,104 INFO L137 encePairwiseOnDemand]: 11/15 looper letters, 172 selfloop transitions, 40 changer transitions 0/213 dead transitions. [2022-12-12 21:59:48,104 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 213 transitions, 2128 flow [2022-12-12 21:59:48,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-12 21:59:48,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-12 21:59:48,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 73 transitions. [2022-12-12 21:59:48,105 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.6083333333333333 [2022-12-12 21:59:48,106 INFO L295 CegarLoopForPetriNet]: 17 programPoint places, 26 predicate places. [2022-12-12 21:59:48,106 INFO L82 GeneralOperation]: Start removeDead. Operand has 43 places, 213 transitions, 2128 flow [2022-12-12 21:59:48,112 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 43 places, 213 transitions, 2128 flow [2022-12-12 21:59:48,112 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 213 transitions, 2128 flow [2022-12-12 21:59:48,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 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) [2022-12-12 21:59:48,112 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 21:59:48,112 INFO L214 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 21:59:48,121 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-12-12 21:59:48,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-12-12 21:59:48,319 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 21:59:48,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 21:59:48,319 INFO L85 PathProgramCache]: Analyzing trace with hash -567710074, now seen corresponding path program 3 times [2022-12-12 21:59:48,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 21:59:48,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615082667] [2022-12-12 21:59:48,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 21:59:48,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 21:59:48,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 21:59:48,484 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-12-12 21:59:48,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 21:59:48,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615082667] [2022-12-12 21:59:48,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615082667] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 21:59:48,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796435992] [2022-12-12 21:59:48,486 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-12 21:59:48,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 21:59:48,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 21:59:48,488 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) [2022-12-12 21:59:48,514 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-12 21:59:48,613 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-12-12 21:59:48,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 21:59:48,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-12 21:59:48,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 21:59:48,672 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-12 21:59:48,673 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 21:59:48,738 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-12 21:59:48,739 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1796435992] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 21:59:48,739 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 21:59:48,739 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 19 [2022-12-12 21:59:48,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090146865] [2022-12-12 21:59:48,739 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 21:59:48,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-12 21:59:48,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 21:59:48,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-12 21:59:48,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=241, Unknown=0, NotChecked=0, Total=342 [2022-12-12 21:59:48,741 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 15 [2022-12-12 21:59:48,741 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 213 transitions, 2128 flow. Second operand has 19 states, 19 states have (on average 4.368421052631579) internal successors, (83), 19 states have internal predecessors, (83), 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) [2022-12-12 21:59:48,741 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 21:59:48,741 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 15 [2022-12-12 21:59:48,742 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 21:59:50,168 INFO L130 PetriNetUnfolder]: 775/1640 cut-off events. [2022-12-12 21:59:50,169 INFO L131 PetriNetUnfolder]: For 893/901 co-relation queries the response was YES. [2022-12-12 21:59:50,171 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9410 conditions, 1640 events. 775/1640 cut-off events. For 893/901 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 7917 event pairs, 4 based on Foata normal form. 2/1581 useless extension candidates. Maximal degree in co-relation 9376. Up to 1409 conditions per place. [2022-12-12 21:59:50,182 INFO L137 encePairwiseOnDemand]: 8/15 looper letters, 484 selfloop transitions, 256 changer transitions 0/741 dead transitions. [2022-12-12 21:59:50,182 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 741 transitions, 8888 flow [2022-12-12 21:59:50,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-12-12 21:59:50,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2022-12-12 21:59:50,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 694 transitions. [2022-12-12 21:59:50,189 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.5198501872659176 [2022-12-12 21:59:50,191 INFO L295 CegarLoopForPetriNet]: 17 programPoint places, 114 predicate places. [2022-12-12 21:59:50,191 INFO L82 GeneralOperation]: Start removeDead. Operand has 131 places, 741 transitions, 8888 flow [2022-12-12 21:59:50,210 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 131 places, 741 transitions, 8888 flow [2022-12-12 21:59:50,211 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 741 transitions, 8888 flow [2022-12-12 21:59:50,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.368421052631579) internal successors, (83), 19 states have internal predecessors, (83), 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) [2022-12-12 21:59:50,211 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 21:59:50,211 INFO L214 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 21:59:50,222 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-12-12 21:59:50,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 21:59:50,417 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 21:59:50,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 21:59:50,418 INFO L85 PathProgramCache]: Analyzing trace with hash -1800207244, now seen corresponding path program 4 times [2022-12-12 21:59:50,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 21:59:50,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101562880] [2022-12-12 21:59:50,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 21:59:50,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 21:59:50,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 21:59:50,719 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 10 proven. 70 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-12-12 21:59:50,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 21:59:50,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101562880] [2022-12-12 21:59:50,720 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101562880] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 21:59:50,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604399675] [2022-12-12 21:59:50,720 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-12 21:59:50,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 21:59:50,722 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 21:59:50,724 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 21:59:50,753 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-12 21:59:50,953 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-12 21:59:50,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 21:59:50,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-12 21:59:50,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 21:59:51,118 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 7 proven. 190 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-12-12 21:59:51,118 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 21:59:51,379 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 7 proven. 190 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-12-12 21:59:51,379 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1604399675] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 21:59:51,379 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 21:59:51,380 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13, 13] total 30 [2022-12-12 21:59:51,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019753839] [2022-12-12 21:59:51,380 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 21:59:51,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-12-12 21:59:51,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 21:59:51,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-12-12 21:59:51,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=275, Invalid=595, Unknown=0, NotChecked=0, Total=870 [2022-12-12 21:59:51,382 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 15 [2022-12-12 21:59:51,382 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 741 transitions, 8888 flow. Second operand has 30 states, 30 states have (on average 4.7) internal successors, (141), 30 states have internal predecessors, (141), 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) [2022-12-12 21:59:51,382 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 21:59:51,382 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 15 [2022-12-12 21:59:51,382 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 21:59:56,791 INFO L130 PetriNetUnfolder]: 1661/3459 cut-off events. [2022-12-12 21:59:56,791 INFO L131 PetriNetUnfolder]: For 2041/2047 co-relation queries the response was YES. [2022-12-12 21:59:56,795 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23414 conditions, 3459 events. 1661/3459 cut-off events. For 2041/2047 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 17865 event pairs, 4 based on Foata normal form. 2/3358 useless extension candidates. Maximal degree in co-relation 23375. Up to 3165 conditions per place. [2022-12-12 21:59:56,820 INFO L137 encePairwiseOnDemand]: 8/15 looper letters, 1143 selfloop transitions, 597 changer transitions 0/1741 dead transitions. [2022-12-12 21:59:56,820 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 1741 transitions, 24368 flow [2022-12-12 21:59:56,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 190 states. [2022-12-12 21:59:56,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2022-12-12 21:59:56,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 1472 transitions. [2022-12-12 21:59:56,826 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.5164912280701754 [2022-12-12 21:59:56,827 INFO L295 CegarLoopForPetriNet]: 17 programPoint places, 303 predicate places. [2022-12-12 21:59:56,827 INFO L82 GeneralOperation]: Start removeDead. Operand has 320 places, 1741 transitions, 24368 flow [2022-12-12 21:59:56,856 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 320 places, 1741 transitions, 24368 flow [2022-12-12 21:59:56,856 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 1741 transitions, 24368 flow [2022-12-12 21:59:56,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 4.7) internal successors, (141), 30 states have internal predecessors, (141), 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) [2022-12-12 21:59:56,857 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 21:59:56,857 INFO L214 CegarLoopForPetriNet]: trace histogram [20, 20, 20, 20, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 21:59:56,870 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-12-12 21:59:57,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 21:59:57,063 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 21:59:57,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 21:59:57,064 INFO L85 PathProgramCache]: Analyzing trace with hash -1799056124, now seen corresponding path program 5 times [2022-12-12 21:59:57,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 21:59:57,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190541323] [2022-12-12 21:59:57,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 21:59:57,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 21:59:57,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 21:59:57,424 INFO L134 CoverageAnalysis]: Checked inductivity of 872 backedges. 20 proven. 92 refuted. 0 times theorem prover too weak. 760 trivial. 0 not checked. [2022-12-12 21:59:57,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 21:59:57,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190541323] [2022-12-12 21:59:57,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190541323] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 21:59:57,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727649591] [2022-12-12 21:59:57,425 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-12 21:59:57,425 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 21:59:57,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 21:59:57,426 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 21:59:57,429 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-12 21:59:57,686 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2022-12-12 21:59:57,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 21:59:57,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 596 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-12 21:59:57,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 21:59:57,825 INFO L134 CoverageAnalysis]: Checked inductivity of 872 backedges. 20 proven. 92 refuted. 0 times theorem prover too weak. 760 trivial. 0 not checked. [2022-12-12 21:59:57,825 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 21:59:58,038 INFO L134 CoverageAnalysis]: Checked inductivity of 872 backedges. 20 proven. 92 refuted. 0 times theorem prover too weak. 760 trivial. 0 not checked. [2022-12-12 21:59:58,038 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [727649591] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 21:59:58,038 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 21:59:58,038 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2022-12-12 21:59:58,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043724910] [2022-12-12 21:59:58,039 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 21:59:58,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-12 21:59:58,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 21:59:58,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-12 21:59:58,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2022-12-12 21:59:58,040 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 15 [2022-12-12 21:59:58,040 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 1741 transitions, 24368 flow. Second operand has 21 states, 21 states have (on average 3.5714285714285716) internal successors, (75), 21 states have internal predecessors, (75), 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) [2022-12-12 21:59:58,040 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 21:59:58,040 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 15 [2022-12-12 21:59:58,040 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 22:00:00,497 INFO L130 PetriNetUnfolder]: 3238/6604 cut-off events. [2022-12-12 22:00:00,498 INFO L131 PetriNetUnfolder]: For 2647/2647 co-relation queries the response was YES. [2022-12-12 22:00:00,508 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51962 conditions, 6604 events. 3238/6604 cut-off events. For 2647/2647 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 39203 event pairs, 4 based on Foata normal form. 0/6482 useless extension candidates. Maximal degree in co-relation 51918. Up to 6167 conditions per place. [2022-12-12 22:00:00,551 INFO L137 encePairwiseOnDemand]: 11/15 looper letters, 3280 selfloop transitions, 740 changer transitions 0/4021 dead transitions. [2022-12-12 22:00:00,551 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 4021 transitions, 64328 flow [2022-12-12 22:00:00,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-12-12 22:00:00,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2022-12-12 22:00:00,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 187 transitions. [2022-12-12 22:00:00,553 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.6233333333333333 [2022-12-12 22:00:00,553 INFO L295 CegarLoopForPetriNet]: 17 programPoint places, 322 predicate places. [2022-12-12 22:00:00,553 INFO L82 GeneralOperation]: Start removeDead. Operand has 339 places, 4021 transitions, 64328 flow [2022-12-12 22:00:00,667 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 339 places, 4021 transitions, 64328 flow [2022-12-12 22:00:00,668 INFO L495 AbstractCegarLoop]: Abstraction has has 339 places, 4021 transitions, 64328 flow [2022-12-12 22:00:00,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.5714285714285716) internal successors, (75), 21 states have internal predecessors, (75), 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) [2022-12-12 22:00:00,668 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 22:00:00,668 INFO L214 CegarLoopForPetriNet]: trace histogram [20, 20, 20, 20, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 22:00:00,677 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-12-12 22:00:00,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 22:00:00,875 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 22:00:00,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 22:00:00,876 INFO L85 PathProgramCache]: Analyzing trace with hash 985767548, now seen corresponding path program 6 times [2022-12-12 22:00:00,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 22:00:00,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941069303] [2022-12-12 22:00:00,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 22:00:00,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 22:00:00,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 22:00:01,535 INFO L134 CoverageAnalysis]: Checked inductivity of 1257 backedges. 20 proven. 477 refuted. 0 times theorem prover too weak. 760 trivial. 0 not checked. [2022-12-12 22:00:01,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 22:00:01,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941069303] [2022-12-12 22:00:01,535 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941069303] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 22:00:01,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725734013] [2022-12-12 22:00:01,536 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-12 22:00:01,536 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 22:00:01,536 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 22:00:01,537 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 22:00:01,540 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-12 22:00:02,095 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2022-12-12 22:00:02,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 22:00:02,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 746 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-12 22:00:02,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 22:00:02,245 INFO L134 CoverageAnalysis]: Checked inductivity of 1257 backedges. 20 proven. 477 refuted. 0 times theorem prover too weak. 760 trivial. 0 not checked. [2022-12-12 22:00:02,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 22:00:02,469 INFO L134 CoverageAnalysis]: Checked inductivity of 1257 backedges. 20 proven. 477 refuted. 0 times theorem prover too weak. 760 trivial. 0 not checked. [2022-12-12 22:00:02,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [725734013] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 22:00:02,469 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 22:00:02,470 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 23 [2022-12-12 22:00:02,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935986843] [2022-12-12 22:00:02,470 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 22:00:02,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-12 22:00:02,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 22:00:02,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-12 22:00:02,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2022-12-12 22:00:02,471 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 15 [2022-12-12 22:00:02,472 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 339 places, 4021 transitions, 64328 flow. Second operand has 23 states, 23 states have (on average 3.391304347826087) internal successors, (78), 23 states have internal predecessors, (78), 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) [2022-12-12 22:00:02,472 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 22:00:02,472 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 15 [2022-12-12 22:00:02,472 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 22:00:06,879 INFO L130 PetriNetUnfolder]: 3570/7282 cut-off events. [2022-12-12 22:00:06,879 INFO L131 PetriNetUnfolder]: For 3921/3921 co-relation queries the response was YES. [2022-12-12 22:00:06,884 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64431 conditions, 7282 events. 3570/7282 cut-off events. For 3921/3921 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 43844 event pairs, 4 based on Foata normal form. 0/7156 useless extension candidates. Maximal degree in co-relation 64382. Up to 6811 conditions per place. [2022-12-12 22:00:06,976 INFO L137 encePairwiseOnDemand]: 11/15 looper letters, 3686 selfloop transitions, 814 changer transitions 0/4501 dead transitions. [2022-12-12 22:00:06,976 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 360 places, 4501 transitions, 81008 flow [2022-12-12 22:00:06,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-12-12 22:00:06,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-12-12 22:00:06,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 197 transitions. [2022-12-12 22:00:06,977 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.5969696969696969 [2022-12-12 22:00:06,979 INFO L295 CegarLoopForPetriNet]: 17 programPoint places, 343 predicate places. [2022-12-12 22:00:06,980 INFO L82 GeneralOperation]: Start removeDead. Operand has 360 places, 4501 transitions, 81008 flow [2022-12-12 22:00:07,057 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 360 places, 4501 transitions, 81008 flow [2022-12-12 22:00:07,058 INFO L495 AbstractCegarLoop]: Abstraction has has 360 places, 4501 transitions, 81008 flow [2022-12-12 22:00:07,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.391304347826087) internal successors, (78), 23 states have internal predecessors, (78), 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) [2022-12-12 22:00:07,058 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 22:00:07,059 INFO L214 CegarLoopForPetriNet]: trace histogram [20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 22:00:07,070 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-12-12 22:00:07,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 22:00:07,267 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 22:00:07,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 22:00:07,267 INFO L85 PathProgramCache]: Analyzing trace with hash 1743254716, now seen corresponding path program 7 times [2022-12-12 22:00:07,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 22:00:07,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155503662] [2022-12-12 22:00:07,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 22:00:07,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 22:00:07,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 22:00:10,334 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 22:00:10,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 22:00:10,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155503662] [2022-12-12 22:00:10,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155503662] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 22:00:10,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987341399] [2022-12-12 22:00:10,334 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-12 22:00:10,334 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 22:00:10,335 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 22:00:10,336 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-12 22:00:10,338 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-12 22:00:10,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 22:00:10,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 776 conjuncts, 128 conjunts are in the unsatisfiable core [2022-12-12 22:00:10,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 22:00:11,025 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 22:00:11,026 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 22:00:11,507 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 22:00:11,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [987341399] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 22:00:11,507 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 22:00:11,507 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61, 61] total 61 [2022-12-12 22:00:11,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269688916] [2022-12-12 22:00:11,508 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 22:00:11,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-12-12 22:00:11,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 22:00:11,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-12-12 22:00:11,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2022-12-12 22:00:11,510 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 15 [2022-12-12 22:00:11,510 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 360 places, 4501 transitions, 81008 flow. Second operand has 63 states, 62 states have (on average 2.3870967741935485) internal successors, (148), 62 states have internal predecessors, (148), 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) [2022-12-12 22:00:11,510 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 22:00:11,510 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 15 [2022-12-12 22:00:11,511 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand