/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_42-trylock2_racefree.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-b8dbc81 [2023-01-27 19:16:24,112 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-01-27 19:16:24,114 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-01-27 19:16:24,144 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-01-27 19:16:24,144 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-01-27 19:16:24,146 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-01-27 19:16:24,148 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-01-27 19:16:24,150 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-01-27 19:16:24,151 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-01-27 19:16:24,155 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-01-27 19:16:24,156 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-01-27 19:16:24,157 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-01-27 19:16:24,157 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-01-27 19:16:24,159 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-01-27 19:16:24,160 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-01-27 19:16:24,161 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-01-27 19:16:24,162 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-01-27 19:16:24,162 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-01-27 19:16:24,164 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-01-27 19:16:24,165 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-01-27 19:16:24,166 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-01-27 19:16:24,167 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-01-27 19:16:24,167 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-01-27 19:16:24,168 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-01-27 19:16:24,169 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-01-27 19:16:24,173 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-01-27 19:16:24,174 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-01-27 19:16:24,174 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-01-27 19:16:24,176 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf [2023-01-27 19:16:24,196 INFO L113 SettingsManager]: Loading preferences was successful [2023-01-27 19:16:24,196 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-01-27 19:16:24,197 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-01-27 19:16:24,197 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-01-27 19:16:24,198 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-01-27 19:16:24,198 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-01-27 19:16:24,198 INFO L138 SettingsManager]: * Use SBE=true [2023-01-27 19:16:24,198 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-01-27 19:16:24,198 INFO L138 SettingsManager]: * sizeof long=4 [2023-01-27 19:16:24,198 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-01-27 19:16:24,199 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-01-27 19:16:24,199 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-01-27 19:16:24,199 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-01-27 19:16:24,199 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-01-27 19:16:24,199 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-01-27 19:16:24,199 INFO L138 SettingsManager]: * sizeof long double=12 [2023-01-27 19:16:24,199 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-01-27 19:16:24,200 INFO L138 SettingsManager]: * Use constant arrays=true [2023-01-27 19:16:24,200 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-01-27 19:16:24,200 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-01-27 19:16:24,200 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-01-27 19:16:24,200 INFO L138 SettingsManager]: * To the following directory=./dump/ [2023-01-27 19:16:24,200 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-01-27 19:16:24,200 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-27 19:16:24,200 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-01-27 19:16:24,200 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-01-27 19:16:24,200 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-01-27 19:16:24,200 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-01-27 19:16:24,200 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-01-27 19:16:24,201 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-01-27 19:16:24,201 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-01-27 19:16:24,201 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-01-27 19:16:24,405 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-01-27 19:16:24,421 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-01-27 19:16:24,423 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-01-27 19:16:24,423 INFO L271 PluginConnector]: Initializing CDTParser... [2023-01-27 19:16:24,424 INFO L275 PluginConnector]: CDTParser initialized [2023-01-27 19:16:24,424 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_42-trylock2_racefree.i [2023-01-27 19:16:25,429 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-01-27 19:16:25,696 INFO L351 CDTParser]: Found 1 translation units. [2023-01-27 19:16:25,697 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_42-trylock2_racefree.i [2023-01-27 19:16:25,711 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7edcdef08/deed8a23e14b4bfeabf49de133f5cb36/FLAG300d7e832 [2023-01-27 19:16:25,721 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7edcdef08/deed8a23e14b4bfeabf49de133f5cb36 [2023-01-27 19:16:25,723 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-01-27 19:16:25,724 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2023-01-27 19:16:25,725 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-01-27 19:16:25,725 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-01-27 19:16:25,728 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-01-27 19:16:25,729 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 07:16:25" (1/1) ... [2023-01-27 19:16:25,730 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@271cd652 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:16:25, skipping insertion in model container [2023-01-27 19:16:25,730 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 07:16:25" (1/1) ... [2023-01-27 19:16:25,735 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-01-27 19:16:25,771 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-01-27 19:16:25,968 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_42-trylock2_racefree.i[30176,30189] [2023-01-27 19:16:25,995 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-27 19:16:26,013 INFO L203 MainTranslator]: Completed pre-run [2023-01-27 19:16:26,049 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_42-trylock2_racefree.i[30176,30189] [2023-01-27 19:16:26,064 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-27 19:16:26,096 INFO L208 MainTranslator]: Completed translation [2023-01-27 19:16:26,096 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:16:26 WrapperNode [2023-01-27 19:16:26,097 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-01-27 19:16:26,098 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-01-27 19:16:26,098 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-01-27 19:16:26,098 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-01-27 19:16:26,103 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:16:26" (1/1) ... [2023-01-27 19:16:26,126 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:16:26" (1/1) ... [2023-01-27 19:16:26,142 INFO L138 Inliner]: procedures = 171, calls = 47, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 130 [2023-01-27 19:16:26,142 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-01-27 19:16:26,143 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-01-27 19:16:26,143 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-01-27 19:16:26,143 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-01-27 19:16:26,163 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:16:26" (1/1) ... [2023-01-27 19:16:26,163 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:16:26" (1/1) ... [2023-01-27 19:16:26,165 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:16:26" (1/1) ... [2023-01-27 19:16:26,165 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:16:26" (1/1) ... [2023-01-27 19:16:26,169 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:16:26" (1/1) ... [2023-01-27 19:16:26,177 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:16:26" (1/1) ... [2023-01-27 19:16:26,178 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:16:26" (1/1) ... [2023-01-27 19:16:26,179 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:16:26" (1/1) ... [2023-01-27 19:16:26,181 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-01-27 19:16:26,182 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-01-27 19:16:26,182 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-01-27 19:16:26,182 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-01-27 19:16:26,183 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:16:26" (1/1) ... [2023-01-27 19:16:26,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-27 19:16:26,199 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 19:16:26,210 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-01-27 19:16:26,225 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-01-27 19:16:26,255 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-01-27 19:16:26,256 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-01-27 19:16:26,256 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-01-27 19:16:26,256 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-01-27 19:16:26,256 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-01-27 19:16:26,256 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-01-27 19:16:26,256 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-01-27 19:16:26,256 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-01-27 19:16:26,256 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexTryLock [2023-01-27 19:16:26,257 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-01-27 19:16:26,257 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-01-27 19:16:26,257 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-01-27 19:16:26,259 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-01-27 19:16:26,409 INFO L236 CfgBuilder]: Building ICFG [2023-01-27 19:16:26,410 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-01-27 19:16:26,676 INFO L277 CfgBuilder]: Performing block encoding [2023-01-27 19:16:26,682 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-01-27 19:16:26,682 INFO L302 CfgBuilder]: Removed 23 assume(true) statements. [2023-01-27 19:16:26,683 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 07:16:26 BoogieIcfgContainer [2023-01-27 19:16:26,684 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-01-27 19:16:26,685 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-01-27 19:16:26,685 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-01-27 19:16:26,687 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-01-27 19:16:26,687 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.01 07:16:25" (1/3) ... [2023-01-27 19:16:26,688 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6cda94de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 07:16:26, skipping insertion in model container [2023-01-27 19:16:26,688 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:16:26" (2/3) ... [2023-01-27 19:16:26,688 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6cda94de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 07:16:26, skipping insertion in model container [2023-01-27 19:16:26,688 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 07:16:26" (3/3) ... [2023-01-27 19:16:26,689 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_42-trylock2_racefree.i [2023-01-27 19:16:26,701 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-01-27 19:16:26,701 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2023-01-27 19:16:26,702 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-01-27 19:16:26,789 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-01-27 19:16:26,819 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 158 places, 184 transitions, 376 flow [2023-01-27 19:16:26,899 INFO L130 PetriNetUnfolder]: 45/269 cut-off events. [2023-01-27 19:16:26,899 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-01-27 19:16:26,912 INFO L83 FinitePrefix]: Finished finitePrefix Result has 275 conditions, 269 events. 45/269 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1001 event pairs, 0 based on Foata normal form. 0/213 useless extension candidates. Maximal degree in co-relation 143. Up to 6 conditions per place. [2023-01-27 19:16:26,912 INFO L82 GeneralOperation]: Start removeDead. Operand has 158 places, 184 transitions, 376 flow [2023-01-27 19:16:26,916 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 154 places, 179 transitions, 363 flow [2023-01-27 19:16:26,918 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-27 19:16:26,924 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 154 places, 179 transitions, 363 flow [2023-01-27 19:16:26,934 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 154 places, 179 transitions, 363 flow [2023-01-27 19:16:26,934 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 154 places, 179 transitions, 363 flow [2023-01-27 19:16:26,971 INFO L130 PetriNetUnfolder]: 44/264 cut-off events. [2023-01-27 19:16:26,971 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-27 19:16:26,972 INFO L83 FinitePrefix]: Finished finitePrefix Result has 269 conditions, 264 events. 44/264 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 985 event pairs, 0 based on Foata normal form. 0/208 useless extension candidates. Maximal degree in co-relation 143. Up to 6 conditions per place. [2023-01-27 19:16:26,977 INFO L119 LiptonReduction]: Number of co-enabled transitions 9646 [2023-01-27 19:16:29,728 INFO L134 LiptonReduction]: Checked pairs total: 21000 [2023-01-27 19:16:29,729 INFO L136 LiptonReduction]: Total number of compositions: 137 [2023-01-27 19:16:29,738 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-27 19:16:29,743 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;@7efe7a24, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-27 19:16:29,743 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-01-27 19:16:29,746 INFO L130 PetriNetUnfolder]: 3/16 cut-off events. [2023-01-27 19:16:29,746 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-27 19:16:29,746 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:16:29,747 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-01-27 19:16:29,747 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-01-27 19:16:29,750 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:16:29,750 INFO L85 PathProgramCache]: Analyzing trace with hash 21768335, now seen corresponding path program 1 times [2023-01-27 19:16:29,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:16:29,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065847187] [2023-01-27 19:16:29,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:16:29,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:16:29,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:16:29,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:16:29,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:16:29,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065847187] [2023-01-27 19:16:29,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065847187] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 19:16:29,931 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 19:16:29,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-27 19:16:29,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832712454] [2023-01-27 19:16:29,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 19:16:29,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 19:16:29,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:16:29,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 19:16:29,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 19:16:29,962 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 321 [2023-01-27 19:16:29,967 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 75 transitions, 155 flow. Second operand has 3 states, 3 states have (on average 145.33333333333334) internal successors, (436), 3 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:16:29,967 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:16:29,967 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 321 [2023-01-27 19:16:29,968 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:16:30,130 INFO L130 PetriNetUnfolder]: 399/884 cut-off events. [2023-01-27 19:16:30,131 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-27 19:16:30,132 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1704 conditions, 884 events. 399/884 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 4262 event pairs, 333 based on Foata normal form. 131/872 useless extension candidates. Maximal degree in co-relation 1689. Up to 796 conditions per place. [2023-01-27 19:16:30,135 INFO L137 encePairwiseOnDemand]: 294/321 looper letters, 50 selfloop transitions, 2 changer transitions 6/66 dead transitions. [2023-01-27 19:16:30,135 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 66 transitions, 253 flow [2023-01-27 19:16:30,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 19:16:30,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 19:16:30,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 527 transitions. [2023-01-27 19:16:30,145 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5472481827622014 [2023-01-27 19:16:30,146 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 527 transitions. [2023-01-27 19:16:30,146 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 527 transitions. [2023-01-27 19:16:30,148 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:16:30,149 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 527 transitions. [2023-01-27 19:16:30,152 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 175.66666666666666) internal successors, (527), 3 states have internal predecessors, (527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:16:30,155 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 321.0) internal successors, (1284), 4 states have internal predecessors, (1284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:16:30,156 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 321.0) internal successors, (1284), 4 states have internal predecessors, (1284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:16:30,157 INFO L175 Difference]: Start difference. First operand has 54 places, 75 transitions, 155 flow. Second operand 3 states and 527 transitions. [2023-01-27 19:16:30,158 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 66 transitions, 253 flow [2023-01-27 19:16:30,159 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 66 transitions, 253 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-01-27 19:16:30,161 INFO L231 Difference]: Finished difference. Result has 55 places, 44 transitions, 101 flow [2023-01-27 19:16:30,162 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=321, PETRI_DIFFERENCE_MINUEND_FLOW=105, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=101, PETRI_PLACES=55, PETRI_TRANSITIONS=44} [2023-01-27 19:16:30,164 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 1 predicate places. [2023-01-27 19:16:30,164 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 44 transitions, 101 flow [2023-01-27 19:16:30,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 145.33333333333334) internal successors, (436), 3 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:16:30,165 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:16:30,165 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-01-27 19:16:30,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-01-27 19:16:30,165 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-01-27 19:16:30,166 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:16:30,166 INFO L85 PathProgramCache]: Analyzing trace with hash -560655468, now seen corresponding path program 1 times [2023-01-27 19:16:30,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:16:30,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058544914] [2023-01-27 19:16:30,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:16:30,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:16:30,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 19:16:30,189 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-27 19:16:30,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 19:16:30,240 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-27 19:16:30,240 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-27 19:16:30,243 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2023-01-27 19:16:30,244 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2023-01-27 19:16:30,244 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2023-01-27 19:16:30,244 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2023-01-27 19:16:30,245 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2023-01-27 19:16:30,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-01-27 19:16:30,247 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-01-27 19:16:30,253 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-27 19:16:30,253 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-01-27 19:16:30,282 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-01-27 19:16:30,290 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 202 places, 239 transitions, 496 flow [2023-01-27 19:16:30,330 INFO L130 PetriNetUnfolder]: 76/433 cut-off events. [2023-01-27 19:16:30,330 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-01-27 19:16:30,333 INFO L83 FinitePrefix]: Finished finitePrefix Result has 447 conditions, 433 events. 76/433 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1832 event pairs, 0 based on Foata normal form. 0/341 useless extension candidates. Maximal degree in co-relation 271. Up to 9 conditions per place. [2023-01-27 19:16:30,333 INFO L82 GeneralOperation]: Start removeDead. Operand has 202 places, 239 transitions, 496 flow [2023-01-27 19:16:30,336 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 202 places, 239 transitions, 496 flow [2023-01-27 19:16:30,336 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-27 19:16:30,337 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 202 places, 239 transitions, 496 flow [2023-01-27 19:16:30,338 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 202 places, 239 transitions, 496 flow [2023-01-27 19:16:30,338 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 202 places, 239 transitions, 496 flow [2023-01-27 19:16:30,374 INFO L130 PetriNetUnfolder]: 76/433 cut-off events. [2023-01-27 19:16:30,374 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-01-27 19:16:30,376 INFO L83 FinitePrefix]: Finished finitePrefix Result has 447 conditions, 433 events. 76/433 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1832 event pairs, 0 based on Foata normal form. 0/341 useless extension candidates. Maximal degree in co-relation 271. Up to 9 conditions per place. [2023-01-27 19:16:30,392 INFO L119 LiptonReduction]: Number of co-enabled transitions 26076 [2023-01-27 19:16:32,921 INFO L134 LiptonReduction]: Checked pairs total: 81736 [2023-01-27 19:16:32,921 INFO L136 LiptonReduction]: Total number of compositions: 162 [2023-01-27 19:16:32,923 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-27 19:16:32,923 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;@7efe7a24, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-27 19:16:32,923 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-01-27 19:16:32,925 INFO L130 PetriNetUnfolder]: 3/16 cut-off events. [2023-01-27 19:16:32,925 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-27 19:16:32,925 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:16:32,925 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-01-27 19:16:32,925 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-01-27 19:16:32,926 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:16:32,926 INFO L85 PathProgramCache]: Analyzing trace with hash 35803857, now seen corresponding path program 1 times [2023-01-27 19:16:32,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:16:32,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699610576] [2023-01-27 19:16:32,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:16:32,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:16:32,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:16:32,979 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:16:32,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:16:32,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699610576] [2023-01-27 19:16:32,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699610576] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 19:16:32,979 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 19:16:32,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-27 19:16:32,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37149824] [2023-01-27 19:16:32,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 19:16:32,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 19:16:32,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:16:32,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 19:16:32,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 19:16:32,981 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 401 [2023-01-27 19:16:32,981 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 118 transitions, 254 flow. Second operand has 3 states, 3 states have (on average 186.33333333333334) internal successors, (559), 3 states have internal predecessors, (559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:16:32,982 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:16:32,982 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 401 [2023-01-27 19:16:32,982 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:16:34,502 INFO L130 PetriNetUnfolder]: 13209/22360 cut-off events. [2023-01-27 19:16:34,502 INFO L131 PetriNetUnfolder]: For 81/81 co-relation queries the response was YES. [2023-01-27 19:16:34,522 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42806 conditions, 22360 events. 13209/22360 cut-off events. For 81/81 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 165681 event pairs, 12212 based on Foata normal form. 5392/25282 useless extension candidates. Maximal degree in co-relation 35687. Up to 20335 conditions per place. [2023-01-27 19:16:34,597 INFO L137 encePairwiseOnDemand]: 364/401 looper letters, 68 selfloop transitions, 2 changer transitions 9/99 dead transitions. [2023-01-27 19:16:34,597 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 99 transitions, 372 flow [2023-01-27 19:16:34,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 19:16:34,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 19:16:34,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 680 transitions. [2023-01-27 19:16:34,599 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5652535328345802 [2023-01-27 19:16:34,600 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 680 transitions. [2023-01-27 19:16:34,600 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 680 transitions. [2023-01-27 19:16:34,600 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:16:34,600 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 680 transitions. [2023-01-27 19:16:34,602 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 226.66666666666666) internal successors, (680), 3 states have internal predecessors, (680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:16:34,605 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 401.0) internal successors, (1604), 4 states have internal predecessors, (1604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:16:34,606 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 401.0) internal successors, (1604), 4 states have internal predecessors, (1604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:16:34,606 INFO L175 Difference]: Start difference. First operand has 86 places, 118 transitions, 254 flow. Second operand 3 states and 680 transitions. [2023-01-27 19:16:34,606 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 99 transitions, 372 flow [2023-01-27 19:16:34,610 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 99 transitions, 372 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-01-27 19:16:34,611 INFO L231 Difference]: Finished difference. Result has 87 places, 74 transitions, 170 flow [2023-01-27 19:16:34,611 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=401, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=170, PETRI_PLACES=87, PETRI_TRANSITIONS=74} [2023-01-27 19:16:34,612 INFO L281 CegarLoopForPetriNet]: 86 programPoint places, 1 predicate places. [2023-01-27 19:16:34,612 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 74 transitions, 170 flow [2023-01-27 19:16:34,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 186.33333333333334) internal successors, (559), 3 states have internal predecessors, (559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:16:34,612 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:16:34,613 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 19:16:34,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-01-27 19:16:34,613 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-01-27 19:16:34,615 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:16:34,615 INFO L85 PathProgramCache]: Analyzing trace with hash 1950747977, now seen corresponding path program 1 times [2023-01-27 19:16:34,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:16:34,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030063220] [2023-01-27 19:16:34,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:16:34,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:16:34,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:16:34,649 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:16:34,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:16:34,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030063220] [2023-01-27 19:16:34,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030063220] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 19:16:34,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216010494] [2023-01-27 19:16:34,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:16:34,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:16:34,650 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 19:16:34,652 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 19:16:34,680 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-01-27 19:16:34,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:16:34,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 3 conjunts are in the unsatisfiable core [2023-01-27 19:16:34,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 19:16:34,787 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:16:34,787 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 19:16:34,802 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:16:34,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1216010494] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 19:16:34,803 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 19:16:34,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-01-27 19:16:34,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204200552] [2023-01-27 19:16:34,803 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 19:16:34,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-01-27 19:16:34,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:16:34,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-01-27 19:16:34,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-01-27 19:16:34,805 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 401 [2023-01-27 19:16:34,806 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 74 transitions, 170 flow. Second operand has 7 states, 7 states have (on average 187.28571428571428) internal successors, (1311), 7 states have internal predecessors, (1311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:16:34,806 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:16:34,806 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 401 [2023-01-27 19:16:34,806 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:16:35,130 INFO L130 PetriNetUnfolder]: 1230/2422 cut-off events. [2023-01-27 19:16:35,130 INFO L131 PetriNetUnfolder]: For 584/584 co-relation queries the response was YES. [2023-01-27 19:16:35,133 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5327 conditions, 2422 events. 1230/2422 cut-off events. For 584/584 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 14503 event pairs, 238 based on Foata normal form. 272/2686 useless extension candidates. Maximal degree in co-relation 4879. Up to 1472 conditions per place. [2023-01-27 19:16:35,139 INFO L137 encePairwiseOnDemand]: 398/401 looper letters, 80 selfloop transitions, 3 changer transitions 0/99 dead transitions. [2023-01-27 19:16:35,140 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 99 transitions, 384 flow [2023-01-27 19:16:35,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-27 19:16:35,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-27 19:16:35,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1010 transitions. [2023-01-27 19:16:35,142 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5037406483790524 [2023-01-27 19:16:35,142 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1010 transitions. [2023-01-27 19:16:35,145 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1010 transitions. [2023-01-27 19:16:35,146 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:16:35,146 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1010 transitions. [2023-01-27 19:16:35,148 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 202.0) internal successors, (1010), 5 states have internal predecessors, (1010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:16:35,150 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 401.0) internal successors, (2406), 6 states have internal predecessors, (2406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:16:35,151 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 401.0) internal successors, (2406), 6 states have internal predecessors, (2406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:16:35,151 INFO L175 Difference]: Start difference. First operand has 87 places, 74 transitions, 170 flow. Second operand 5 states and 1010 transitions. [2023-01-27 19:16:35,151 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 99 transitions, 384 flow [2023-01-27 19:16:35,155 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 99 transitions, 380 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-01-27 19:16:35,157 INFO L231 Difference]: Finished difference. Result has 62 places, 52 transitions, 126 flow [2023-01-27 19:16:35,157 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=401, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=126, PETRI_PLACES=62, PETRI_TRANSITIONS=52} [2023-01-27 19:16:35,158 INFO L281 CegarLoopForPetriNet]: 86 programPoint places, -24 predicate places. [2023-01-27 19:16:35,159 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 52 transitions, 126 flow [2023-01-27 19:16:35,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 187.28571428571428) internal successors, (1311), 7 states have internal predecessors, (1311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:16:35,159 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:16:35,159 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-01-27 19:16:35,167 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-01-27 19:16:35,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:16:35,367 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-01-27 19:16:35,368 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:16:35,368 INFO L85 PathProgramCache]: Analyzing trace with hash -778084677, now seen corresponding path program 1 times [2023-01-27 19:16:35,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:16:35,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965225274] [2023-01-27 19:16:35,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:16:35,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:16:35,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 19:16:35,389 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-27 19:16:35,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 19:16:35,410 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-27 19:16:35,411 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-27 19:16:35,411 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2023-01-27 19:16:35,411 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2023-01-27 19:16:35,411 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2023-01-27 19:16:35,411 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2023-01-27 19:16:35,411 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2023-01-27 19:16:35,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-01-27 19:16:35,412 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-01-27 19:16:35,412 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-27 19:16:35,412 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-01-27 19:16:35,435 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-01-27 19:16:35,437 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 246 places, 294 transitions, 618 flow [2023-01-27 19:16:35,482 INFO L130 PetriNetUnfolder]: 112/628 cut-off events. [2023-01-27 19:16:35,482 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-01-27 19:16:35,486 INFO L83 FinitePrefix]: Finished finitePrefix Result has 656 conditions, 628 events. 112/628 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 2789 event pairs, 1 based on Foata normal form. 0/496 useless extension candidates. Maximal degree in co-relation 441. Up to 16 conditions per place. [2023-01-27 19:16:35,487 INFO L82 GeneralOperation]: Start removeDead. Operand has 246 places, 294 transitions, 618 flow [2023-01-27 19:16:35,490 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 246 places, 294 transitions, 618 flow [2023-01-27 19:16:35,490 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-27 19:16:35,490 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 246 places, 294 transitions, 618 flow [2023-01-27 19:16:35,491 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 246 places, 294 transitions, 618 flow [2023-01-27 19:16:35,491 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 246 places, 294 transitions, 618 flow [2023-01-27 19:16:35,568 INFO L130 PetriNetUnfolder]: 112/628 cut-off events. [2023-01-27 19:16:35,568 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-01-27 19:16:35,571 INFO L83 FinitePrefix]: Finished finitePrefix Result has 656 conditions, 628 events. 112/628 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 2789 event pairs, 1 based on Foata normal form. 0/496 useless extension candidates. Maximal degree in co-relation 441. Up to 16 conditions per place. [2023-01-27 19:16:35,585 INFO L119 LiptonReduction]: Number of co-enabled transitions 48018 [2023-01-27 19:16:38,518 INFO L134 LiptonReduction]: Checked pairs total: 140868 [2023-01-27 19:16:38,518 INFO L136 LiptonReduction]: Total number of compositions: 191 [2023-01-27 19:16:38,519 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-27 19:16:38,520 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;@7efe7a24, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-27 19:16:38,520 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-01-27 19:16:38,521 INFO L130 PetriNetUnfolder]: 2/13 cut-off events. [2023-01-27 19:16:38,521 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-27 19:16:38,521 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:16:38,522 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-01-27 19:16:38,522 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-01-27 19:16:38,522 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:16:38,522 INFO L85 PathProgramCache]: Analyzing trace with hash 52424177, now seen corresponding path program 1 times [2023-01-27 19:16:38,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:16:38,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544290026] [2023-01-27 19:16:38,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:16:38,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:16:38,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:16:38,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:16:38,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:16:38,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544290026] [2023-01-27 19:16:38,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544290026] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 19:16:38,539 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 19:16:38,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-27 19:16:38,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386275748] [2023-01-27 19:16:38,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 19:16:38,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 19:16:38,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:16:38,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 19:16:38,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 19:16:38,541 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 226 out of 485 [2023-01-27 19:16:38,541 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 150 transitions, 330 flow. Second operand has 3 states, 3 states have (on average 227.33333333333334) internal successors, (682), 3 states have internal predecessors, (682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:16:38,542 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:16:38,542 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 226 of 485 [2023-01-27 19:16:38,542 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:17:05,644 INFO L130 PetriNetUnfolder]: 303528/450098 cut-off events. [2023-01-27 19:17:05,645 INFO L131 PetriNetUnfolder]: For 2930/2930 co-relation queries the response was YES. [2023-01-27 19:17:06,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 866645 conditions, 450098 events. 303528/450098 cut-off events. For 2930/2930 co-relation queries the response was YES. Maximal size of possible extension queue 7075. Compared 3954641 event pairs, 196033 based on Foata normal form. 76785/494114 useless extension candidates. Maximal degree in co-relation 40864. Up to 414409 conditions per place. [2023-01-27 19:17:07,658 INFO L137 encePairwiseOnDemand]: 437/485 looper letters, 84 selfloop transitions, 2 changer transitions 10/121 dead transitions. [2023-01-27 19:17:07,658 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 121 transitions, 462 flow [2023-01-27 19:17:07,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 19:17:07,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 19:17:07,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 831 transitions. [2023-01-27 19:17:07,661 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5711340206185567 [2023-01-27 19:17:07,661 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 831 transitions. [2023-01-27 19:17:07,661 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 831 transitions. [2023-01-27 19:17:07,661 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:17:07,661 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 831 transitions. [2023-01-27 19:17:07,663 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 277.0) internal successors, (831), 3 states have internal predecessors, (831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:17:07,665 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 485.0) internal successors, (1940), 4 states have internal predecessors, (1940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:17:07,665 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 485.0) internal successors, (1940), 4 states have internal predecessors, (1940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:17:07,666 INFO L175 Difference]: Start difference. First operand has 108 places, 150 transitions, 330 flow. Second operand 3 states and 831 transitions. [2023-01-27 19:17:07,666 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 121 transitions, 462 flow [2023-01-27 19:17:07,672 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 121 transitions, 462 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-01-27 19:17:07,673 INFO L231 Difference]: Finished difference. Result has 110 places, 95 transitions, 221 flow [2023-01-27 19:17:07,673 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=485, PETRI_DIFFERENCE_MINUEND_FLOW=238, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=221, PETRI_PLACES=110, PETRI_TRANSITIONS=95} [2023-01-27 19:17:07,674 INFO L281 CegarLoopForPetriNet]: 108 programPoint places, 2 predicate places. [2023-01-27 19:17:07,674 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 95 transitions, 221 flow [2023-01-27 19:17:07,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 227.33333333333334) internal successors, (682), 3 states have internal predecessors, (682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:17:07,674 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:17:07,675 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 19:17:07,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-01-27 19:17:07,675 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-01-27 19:17:07,675 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:17:07,675 INFO L85 PathProgramCache]: Analyzing trace with hash 2065764489, now seen corresponding path program 1 times [2023-01-27 19:17:07,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:17:07,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094753140] [2023-01-27 19:17:07,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:17:07,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:17:07,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:17:07,702 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:17:07,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:17:07,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094753140] [2023-01-27 19:17:07,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094753140] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 19:17:07,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253601611] [2023-01-27 19:17:07,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:17:07,703 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:17:07,703 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 19:17:07,704 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 19:17:07,706 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-01-27 19:17:07,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:17:07,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 3 conjunts are in the unsatisfiable core [2023-01-27 19:17:07,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 19:17:07,777 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:17:07,777 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 19:17:07,796 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:17:07,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1253601611] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 19:17:07,797 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 19:17:07,797 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-01-27 19:17:07,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765090629] [2023-01-27 19:17:07,798 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 19:17:07,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-01-27 19:17:07,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:17:07,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-01-27 19:17:07,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-01-27 19:17:07,800 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 226 out of 485 [2023-01-27 19:17:07,802 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 95 transitions, 221 flow. Second operand has 7 states, 7 states have (on average 228.28571428571428) internal successors, (1598), 7 states have internal predecessors, (1598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:17:07,802 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:17:07,802 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 226 of 485 [2023-01-27 19:17:07,802 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:17:10,735 INFO L130 PetriNetUnfolder]: 31732/50621 cut-off events. [2023-01-27 19:17:10,735 INFO L131 PetriNetUnfolder]: For 17352/17352 co-relation queries the response was YES. [2023-01-27 19:17:10,797 INFO L83 FinitePrefix]: Finished finitePrefix Result has 112973 conditions, 50621 events. 31732/50621 cut-off events. For 17352/17352 co-relation queries the response was YES. Maximal size of possible extension queue 993. Compared 397678 event pairs, 224 based on Foata normal form. 4336/54950 useless extension candidates. Maximal degree in co-relation 105700. Up to 31106 conditions per place. [2023-01-27 19:17:10,958 INFO L137 encePairwiseOnDemand]: 482/485 looper letters, 141 selfloop transitions, 4 changer transitions 0/168 dead transitions. [2023-01-27 19:17:10,959 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 168 transitions, 657 flow [2023-01-27 19:17:10,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-27 19:17:10,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-27 19:17:10,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1504 transitions. [2023-01-27 19:17:10,966 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5168384879725086 [2023-01-27 19:17:10,966 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1504 transitions. [2023-01-27 19:17:10,966 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1504 transitions. [2023-01-27 19:17:10,968 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:17:10,968 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1504 transitions. [2023-01-27 19:17:10,971 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 250.66666666666666) internal successors, (1504), 6 states have internal predecessors, (1504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:17:10,975 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 485.0) internal successors, (3395), 7 states have internal predecessors, (3395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:17:10,976 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 485.0) internal successors, (3395), 7 states have internal predecessors, (3395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:17:10,976 INFO L175 Difference]: Start difference. First operand has 110 places, 95 transitions, 221 flow. Second operand 6 states and 1504 transitions. [2023-01-27 19:17:10,976 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 168 transitions, 657 flow [2023-01-27 19:17:10,996 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 168 transitions, 649 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-01-27 19:17:10,998 INFO L231 Difference]: Finished difference. Result has 88 places, 76 transitions, 183 flow [2023-01-27 19:17:10,998 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=485, PETRI_DIFFERENCE_MINUEND_FLOW=171, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=183, PETRI_PLACES=88, PETRI_TRANSITIONS=76} [2023-01-27 19:17:10,999 INFO L281 CegarLoopForPetriNet]: 108 programPoint places, -20 predicate places. [2023-01-27 19:17:10,999 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 76 transitions, 183 flow [2023-01-27 19:17:11,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 228.28571428571428) internal successors, (1598), 7 states have internal predecessors, (1598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:17:11,000 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:17:11,000 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-01-27 19:17:11,004 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-01-27 19:17:11,203 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,SelfDestructingSolverStorable6 [2023-01-27 19:17:11,204 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-01-27 19:17:11,204 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:17:11,204 INFO L85 PathProgramCache]: Analyzing trace with hash -2086760866, now seen corresponding path program 1 times [2023-01-27 19:17:11,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:17:11,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403579227] [2023-01-27 19:17:11,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:17:11,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:17:11,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 19:17:11,215 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-27 19:17:11,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 19:17:11,234 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-27 19:17:11,234 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-27 19:17:11,237 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2023-01-27 19:17:11,237 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2023-01-27 19:17:11,237 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2023-01-27 19:17:11,237 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2023-01-27 19:17:11,237 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2023-01-27 19:17:11,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-01-27 19:17:11,237 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-01-27 19:17:11,238 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-27 19:17:11,238 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-01-27 19:17:11,263 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-01-27 19:17:11,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 290 places, 349 transitions, 742 flow [2023-01-27 19:17:11,356 INFO L130 PetriNetUnfolder]: 160/887 cut-off events. [2023-01-27 19:17:11,356 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-01-27 19:17:11,365 INFO L83 FinitePrefix]: Finished finitePrefix Result has 942 conditions, 887 events. 160/887 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 4176 event pairs, 6 based on Foata normal form. 0/707 useless extension candidates. Maximal degree in co-relation 648. Up to 32 conditions per place. [2023-01-27 19:17:11,365 INFO L82 GeneralOperation]: Start removeDead. Operand has 290 places, 349 transitions, 742 flow [2023-01-27 19:17:11,372 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 290 places, 349 transitions, 742 flow [2023-01-27 19:17:11,372 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-27 19:17:11,372 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 290 places, 349 transitions, 742 flow [2023-01-27 19:17:11,373 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 290 places, 349 transitions, 742 flow [2023-01-27 19:17:11,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 290 places, 349 transitions, 742 flow [2023-01-27 19:17:11,464 INFO L130 PetriNetUnfolder]: 160/887 cut-off events. [2023-01-27 19:17:11,464 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-01-27 19:17:11,473 INFO L83 FinitePrefix]: Finished finitePrefix Result has 942 conditions, 887 events. 160/887 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 4176 event pairs, 6 based on Foata normal form. 0/707 useless extension candidates. Maximal degree in co-relation 648. Up to 32 conditions per place. [2023-01-27 19:17:11,504 INFO L119 LiptonReduction]: Number of co-enabled transitions 75896 [2023-01-27 19:17:14,466 INFO L134 LiptonReduction]: Checked pairs total: 259511 [2023-01-27 19:17:14,466 INFO L136 LiptonReduction]: Total number of compositions: 213 [2023-01-27 19:17:14,467 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-27 19:17:14,468 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;@7efe7a24, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-27 19:17:14,468 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-01-27 19:17:14,469 INFO L130 PetriNetUnfolder]: 2/13 cut-off events. [2023-01-27 19:17:14,469 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-27 19:17:14,469 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:17:14,469 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-01-27 19:17:14,469 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-01-27 19:17:14,469 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:17:14,469 INFO L85 PathProgramCache]: Analyzing trace with hash 71420541, now seen corresponding path program 1 times [2023-01-27 19:17:14,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:17:14,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195901352] [2023-01-27 19:17:14,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:17:14,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:17:14,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:17:14,493 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:17:14,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:17:14,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195901352] [2023-01-27 19:17:14,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195901352] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 19:17:14,494 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 19:17:14,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-27 19:17:14,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929468638] [2023-01-27 19:17:14,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 19:17:14,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 19:17:14,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:17:14,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 19:17:14,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 19:17:14,496 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 267 out of 562 [2023-01-27 19:17:14,496 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 186 transitions, 416 flow. Second operand has 3 states, 3 states have (on average 268.3333333333333) internal successors, (805), 3 states have internal predecessors, (805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:17:14,496 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:17:14,496 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 267 of 562 [2023-01-27 19:17:14,496 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand