/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_21-deref_read_racing.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-b8dbc81 [2023-01-28 07:51:49,096 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-01-28 07:51:49,098 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-01-28 07:51:49,124 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-01-28 07:51:49,125 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-01-28 07:51:49,128 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-01-28 07:51:49,131 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-01-28 07:51:49,132 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-01-28 07:51:49,133 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-01-28 07:51:49,140 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-01-28 07:51:49,141 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-01-28 07:51:49,144 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-01-28 07:51:49,144 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-01-28 07:51:49,146 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-01-28 07:51:49,146 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-01-28 07:51:49,147 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-01-28 07:51:49,148 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-01-28 07:51:49,148 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-01-28 07:51:49,149 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-01-28 07:51:49,151 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-01-28 07:51:49,152 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-01-28 07:51:49,157 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-01-28 07:51:49,158 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-01-28 07:51:49,158 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-01-28 07:51:49,160 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-01-28 07:51:49,160 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-01-28 07:51:49,161 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-01-28 07:51:49,161 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-01-28 07:51:49,161 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-01-28 07:51:49,162 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-01-28 07:51:49,162 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-01-28 07:51:49,162 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-01-28 07:51:49,163 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-01-28 07:51:49,163 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-01-28 07:51:49,164 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-01-28 07:51:49,164 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-01-28 07:51:49,164 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-01-28 07:51:49,164 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-01-28 07:51:49,164 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-01-28 07:51:49,165 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-01-28 07:51:49,165 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-01-28 07:51:49,181 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf [2023-01-28 07:51:49,207 INFO L113 SettingsManager]: Loading preferences was successful [2023-01-28 07:51:49,207 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-01-28 07:51:49,208 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-01-28 07:51:49,208 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-01-28 07:51:49,208 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-01-28 07:51:49,208 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-01-28 07:51:49,208 INFO L138 SettingsManager]: * Use SBE=true [2023-01-28 07:51:49,208 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-01-28 07:51:49,208 INFO L138 SettingsManager]: * sizeof long=4 [2023-01-28 07:51:49,208 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-01-28 07:51:49,208 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-01-28 07:51:49,209 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-01-28 07:51:49,209 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-01-28 07:51:49,209 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-01-28 07:51:49,209 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-01-28 07:51:49,209 INFO L138 SettingsManager]: * sizeof long double=12 [2023-01-28 07:51:49,209 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-01-28 07:51:49,209 INFO L138 SettingsManager]: * Use constant arrays=true [2023-01-28 07:51:49,209 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-01-28 07:51:49,209 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-01-28 07:51:49,209 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-01-28 07:51:49,209 INFO L138 SettingsManager]: * To the following directory=./dump/ [2023-01-28 07:51:49,209 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-01-28 07:51:49,210 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-28 07:51:49,210 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-01-28 07:51:49,210 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-01-28 07:51:49,210 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-01-28 07:51:49,210 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-01-28 07:51:49,210 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-01-28 07:51:49,210 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-01-28 07:51:49,210 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-01-28 07:51:49,210 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-01-28 07:51:49,396 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-01-28 07:51:49,417 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-01-28 07:51:49,418 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-01-28 07:51:49,419 INFO L271 PluginConnector]: Initializing CDTParser... [2023-01-28 07:51:49,420 INFO L275 PluginConnector]: CDTParser initialized [2023-01-28 07:51:49,421 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_21-deref_read_racing.i [2023-01-28 07:51:50,476 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-01-28 07:51:50,716 INFO L351 CDTParser]: Found 1 translation units. [2023-01-28 07:51:50,716 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_21-deref_read_racing.i [2023-01-28 07:51:50,727 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ac5bd1a8d/288ec704d6604c9498e0a169ab1313f7/FLAGbc59d389b [2023-01-28 07:51:50,739 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ac5bd1a8d/288ec704d6604c9498e0a169ab1313f7 [2023-01-28 07:51:50,741 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-01-28 07:51:50,742 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2023-01-28 07:51:50,743 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-01-28 07:51:50,743 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-01-28 07:51:50,745 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-01-28 07:51:50,746 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.01 07:51:50" (1/1) ... [2023-01-28 07:51:50,747 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@50d5018a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 07:51:50, skipping insertion in model container [2023-01-28 07:51:50,747 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.01 07:51:50" (1/1) ... [2023-01-28 07:51:50,753 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-01-28 07:51:50,789 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-01-28 07:51:50,959 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_21-deref_read_racing.i[30176,30189] [2023-01-28 07:51:50,973 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-28 07:51:50,981 INFO L203 MainTranslator]: Completed pre-run [2023-01-28 07:51:51,014 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_21-deref_read_racing.i[30176,30189] [2023-01-28 07:51:51,019 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-28 07:51:51,045 INFO L208 MainTranslator]: Completed translation [2023-01-28 07:51:51,045 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 07:51:51 WrapperNode [2023-01-28 07:51:51,045 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-01-28 07:51:51,046 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-01-28 07:51:51,046 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-01-28 07:51:51,046 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-01-28 07:51:51,051 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 07:51:51" (1/1) ... [2023-01-28 07:51:51,060 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 07:51:51" (1/1) ... [2023-01-28 07:51:51,072 INFO L138 Inliner]: procedures = 170, calls = 35, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 65 [2023-01-28 07:51:51,072 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-01-28 07:51:51,073 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-01-28 07:51:51,073 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-01-28 07:51:51,073 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-01-28 07:51:51,078 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 07:51:51" (1/1) ... [2023-01-28 07:51:51,079 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 07:51:51" (1/1) ... [2023-01-28 07:51:51,081 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 07:51:51" (1/1) ... [2023-01-28 07:51:51,081 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 07:51:51" (1/1) ... [2023-01-28 07:51:51,084 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 07:51:51" (1/1) ... [2023-01-28 07:51:51,086 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 07:51:51" (1/1) ... [2023-01-28 07:51:51,087 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 07:51:51" (1/1) ... [2023-01-28 07:51:51,088 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 07:51:51" (1/1) ... [2023-01-28 07:51:51,089 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-01-28 07:51:51,090 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-01-28 07:51:51,090 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-01-28 07:51:51,090 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-01-28 07:51:51,091 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 07:51:51" (1/1) ... [2023-01-28 07:51:51,094 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-28 07:51:51,103 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 07:51:51,112 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-01-28 07:51:51,131 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-01-28 07:51:51,163 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-01-28 07:51:51,163 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-01-28 07:51:51,163 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-01-28 07:51:51,163 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-01-28 07:51:51,163 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-01-28 07:51:51,163 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-01-28 07:51:51,163 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-01-28 07:51:51,163 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-01-28 07:51:51,163 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-01-28 07:51:51,165 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-01-28 07:51:51,165 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-01-28 07:51:51,166 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-01-28 07:51:51,249 INFO L236 CfgBuilder]: Building ICFG [2023-01-28 07:51:51,251 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-01-28 07:51:51,376 INFO L277 CfgBuilder]: Performing block encoding [2023-01-28 07:51:51,381 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-01-28 07:51:51,381 INFO L302 CfgBuilder]: Removed 9 assume(true) statements. [2023-01-28 07:51:51,382 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 07:51:51 BoogieIcfgContainer [2023-01-28 07:51:51,382 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-01-28 07:51:51,384 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-01-28 07:51:51,384 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-01-28 07:51:51,386 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-01-28 07:51:51,386 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.01 07:51:50" (1/3) ... [2023-01-28 07:51:51,386 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e96c536 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.01 07:51:51, skipping insertion in model container [2023-01-28 07:51:51,387 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 07:51:51" (2/3) ... [2023-01-28 07:51:51,387 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e96c536 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.01 07:51:51, skipping insertion in model container [2023-01-28 07:51:51,387 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 07:51:51" (3/3) ... [2023-01-28 07:51:51,388 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_21-deref_read_racing.i [2023-01-28 07:51:51,399 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-01-28 07:51:51,400 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-01-28 07:51:51,400 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-01-28 07:51:51,441 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-01-28 07:51:51,475 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 90 places, 97 transitions, 199 flow [2023-01-28 07:51:51,527 INFO L130 PetriNetUnfolder]: 14/125 cut-off events. [2023-01-28 07:51:51,528 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 07:51:51,532 INFO L83 FinitePrefix]: Finished finitePrefix Result has 130 conditions, 125 events. 14/125 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 265 event pairs, 0 based on Foata normal form. 0/107 useless extension candidates. Maximal degree in co-relation 65. Up to 4 conditions per place. [2023-01-28 07:51:51,532 INFO L82 GeneralOperation]: Start removeDead. Operand has 90 places, 97 transitions, 199 flow [2023-01-28 07:51:51,562 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 90 places, 97 transitions, 199 flow [2023-01-28 07:51:51,578 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 07:51:51,584 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 90 places, 97 transitions, 199 flow [2023-01-28 07:51:51,586 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 90 places, 97 transitions, 199 flow [2023-01-28 07:51:51,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 90 places, 97 transitions, 199 flow [2023-01-28 07:51:51,612 INFO L130 PetriNetUnfolder]: 14/125 cut-off events. [2023-01-28 07:51:51,612 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 07:51:51,613 INFO L83 FinitePrefix]: Finished finitePrefix Result has 130 conditions, 125 events. 14/125 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 265 event pairs, 0 based on Foata normal form. 0/107 useless extension candidates. Maximal degree in co-relation 65. Up to 4 conditions per place. [2023-01-28 07:51:51,614 INFO L119 LiptonReduction]: Number of co-enabled transitions 2176 [2023-01-28 07:51:53,554 INFO L134 LiptonReduction]: Checked pairs total: 3921 [2023-01-28 07:51:53,555 INFO L136 LiptonReduction]: Total number of compositions: 82 [2023-01-28 07:51:53,566 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-28 07:51:53,580 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;@7a35f8c1, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 07:51:53,580 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-01-28 07:51:53,594 INFO L130 PetriNetUnfolder]: 0/8 cut-off events. [2023-01-28 07:51:53,594 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 07:51:53,595 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 07:51:53,595 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-01-28 07:51:53,595 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-28 07:51:53,601 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 07:51:53,602 INFO L85 PathProgramCache]: Analyzing trace with hash 11721076, now seen corresponding path program 1 times [2023-01-28 07:51:53,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 07:51:53,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988450293] [2023-01-28 07:51:53,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:51:53,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 07:51:53,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 07:51:53,811 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 07:51:53,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 07:51:53,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988450293] [2023-01-28 07:51:53,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988450293] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 07:51:53,812 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 07:51:53,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-28 07:51:53,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463344196] [2023-01-28 07:51:53,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 07:51:53,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 07:51:53,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 07:51:53,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 07:51:53,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-28 07:51:53,836 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 179 [2023-01-28 07:51:53,837 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 29 transitions, 63 flow. Second operand has 3 states, 3 states have (on average 79.33333333333333) internal successors, (238), 3 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:51:53,837 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 07:51:53,838 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 179 [2023-01-28 07:51:53,838 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 07:51:53,918 INFO L130 PetriNetUnfolder]: 63/156 cut-off events. [2023-01-28 07:51:53,918 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 07:51:53,919 INFO L83 FinitePrefix]: Finished finitePrefix Result has 308 conditions, 156 events. 63/156 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 476 event pairs, 48 based on Foata normal form. 16/152 useless extension candidates. Maximal degree in co-relation 293. Up to 134 conditions per place. [2023-01-28 07:51:53,921 INFO L137 encePairwiseOnDemand]: 168/179 looper letters, 23 selfloop transitions, 2 changer transitions 4/31 dead transitions. [2023-01-28 07:51:53,921 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 31 transitions, 123 flow [2023-01-28 07:51:53,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-28 07:51:53,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-28 07:51:53,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 277 transitions. [2023-01-28 07:51:53,936 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.515828677839851 [2023-01-28 07:51:53,937 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 277 transitions. [2023-01-28 07:51:53,937 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 277 transitions. [2023-01-28 07:51:53,939 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 07:51:53,941 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 277 transitions. [2023-01-28 07:51:53,944 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 92.33333333333333) internal successors, (277), 3 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:51:53,946 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 179.0) internal successors, (716), 4 states have internal predecessors, (716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:51:53,947 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 179.0) internal successors, (716), 4 states have internal predecessors, (716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:51:53,948 INFO L175 Difference]: Start difference. First operand has 24 places, 29 transitions, 63 flow. Second operand 3 states and 277 transitions. [2023-01-28 07:51:53,948 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 31 transitions, 123 flow [2023-01-28 07:51:53,950 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 31 transitions, 123 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-01-28 07:51:53,951 INFO L231 Difference]: Finished difference. Result has 27 places, 18 transitions, 47 flow [2023-01-28 07:51:53,953 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=47, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=47, PETRI_PLACES=27, PETRI_TRANSITIONS=18} [2023-01-28 07:51:53,955 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 3 predicate places. [2023-01-28 07:51:53,956 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 18 transitions, 47 flow [2023-01-28 07:51:53,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 79.33333333333333) internal successors, (238), 3 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:51:53,956 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 07:51:53,956 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-01-28 07:51:53,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-01-28 07:51:53,956 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-28 07:51:53,958 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 07:51:53,958 INFO L85 PathProgramCache]: Analyzing trace with hash 1643081957, now seen corresponding path program 1 times [2023-01-28 07:51:53,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 07:51:53,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355762393] [2023-01-28 07:51:53,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:51:53,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 07:51:53,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 07:51:54,070 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 07:51:54,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 07:51:54,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355762393] [2023-01-28 07:51:54,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355762393] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 07:51:54,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246092999] [2023-01-28 07:51:54,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:51:54,071 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 07:51:54,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 07:51:54,073 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 07:51:54,089 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-01-28 07:51:54,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 07:51:54,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 3 conjunts are in the unsatisfiable core [2023-01-28 07:51:54,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 07:51:54,174 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 07:51:54,174 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 07:51:54,190 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 07:51:54,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1246092999] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 07:51:54,190 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 07:51:54,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-01-28 07:51:54,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389040409] [2023-01-28 07:51:54,191 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 07:51:54,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-01-28 07:51:54,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 07:51:54,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-01-28 07:51:54,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-01-28 07:51:54,193 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 179 [2023-01-28 07:51:54,194 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 18 transitions, 47 flow. Second operand has 7 states, 7 states have (on average 80.28571428571429) internal successors, (562), 7 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:51:54,194 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 07:51:54,194 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 179 [2023-01-28 07:51:54,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 07:51:54,239 INFO L130 PetriNetUnfolder]: 18/54 cut-off events. [2023-01-28 07:51:54,240 INFO L131 PetriNetUnfolder]: For 17/17 co-relation queries the response was YES. [2023-01-28 07:51:54,240 INFO L83 FinitePrefix]: Finished finitePrefix Result has 132 conditions, 54 events. 18/54 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 79 event pairs, 8 based on Foata normal form. 10/64 useless extension candidates. Maximal degree in co-relation 118. Up to 38 conditions per place. [2023-01-28 07:51:54,240 INFO L137 encePairwiseOnDemand]: 176/179 looper letters, 0 selfloop transitions, 0 changer transitions 25/25 dead transitions. [2023-01-28 07:51:54,240 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 25 transitions, 105 flow [2023-01-28 07:51:54,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-01-28 07:51:54,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-01-28 07:51:54,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 336 transitions. [2023-01-28 07:51:54,242 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4692737430167598 [2023-01-28 07:51:54,242 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 336 transitions. [2023-01-28 07:51:54,242 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 336 transitions. [2023-01-28 07:51:54,242 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 07:51:54,242 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 336 transitions. [2023-01-28 07:51:54,243 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 84.0) internal successors, (336), 4 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:51:54,244 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 179.0) internal successors, (895), 5 states have internal predecessors, (895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:51:54,244 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 179.0) internal successors, (895), 5 states have internal predecessors, (895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:51:54,244 INFO L175 Difference]: Start difference. First operand has 27 places, 18 transitions, 47 flow. Second operand 4 states and 336 transitions. [2023-01-28 07:51:54,244 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 25 transitions, 105 flow [2023-01-28 07:51:54,245 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 25 transitions, 99 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-01-28 07:51:54,245 INFO L231 Difference]: Finished difference. Result has 21 places, 0 transitions, 0 flow [2023-01-28 07:51:54,245 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=33, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=21, PETRI_TRANSITIONS=0} [2023-01-28 07:51:54,246 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, -3 predicate places. [2023-01-28 07:51:54,246 INFO L495 AbstractCegarLoop]: Abstraction has has 21 places, 0 transitions, 0 flow [2023-01-28 07:51:54,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 80.28571428571429) internal successors, (562), 7 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:51:54,248 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-01-28 07:51:54,271 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-01-28 07:51:54,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 07:51:54,454 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-01-28 07:51:54,455 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-01-28 07:51:54,458 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 90 places, 97 transitions, 199 flow [2023-01-28 07:51:54,466 INFO L130 PetriNetUnfolder]: 14/125 cut-off events. [2023-01-28 07:51:54,467 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 07:51:54,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 130 conditions, 125 events. 14/125 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 265 event pairs, 0 based on Foata normal form. 0/107 useless extension candidates. Maximal degree in co-relation 65. Up to 4 conditions per place. [2023-01-28 07:51:54,467 INFO L82 GeneralOperation]: Start removeDead. Operand has 90 places, 97 transitions, 199 flow [2023-01-28 07:51:54,468 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 90 places, 97 transitions, 199 flow [2023-01-28 07:51:54,468 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 07:51:54,468 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 90 places, 97 transitions, 199 flow [2023-01-28 07:51:54,468 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 90 places, 97 transitions, 199 flow [2023-01-28 07:51:54,468 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 90 places, 97 transitions, 199 flow [2023-01-28 07:51:54,479 INFO L130 PetriNetUnfolder]: 14/125 cut-off events. [2023-01-28 07:51:54,479 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 07:51:54,479 INFO L83 FinitePrefix]: Finished finitePrefix Result has 130 conditions, 125 events. 14/125 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 265 event pairs, 0 based on Foata normal form. 0/107 useless extension candidates. Maximal degree in co-relation 65. Up to 4 conditions per place. [2023-01-28 07:51:54,480 INFO L119 LiptonReduction]: Number of co-enabled transitions 2176 [2023-01-28 07:51:56,375 INFO L134 LiptonReduction]: Checked pairs total: 3901 [2023-01-28 07:51:56,375 INFO L136 LiptonReduction]: Total number of compositions: 82 [2023-01-28 07:51:56,377 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-01-28 07:51:56,377 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;@7a35f8c1, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 07:51:56,378 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-01-28 07:51:56,379 INFO L130 PetriNetUnfolder]: 2/18 cut-off events. [2023-01-28 07:51:56,379 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 07:51:56,379 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 07:51:56,380 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-01-28 07:51:56,380 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 07:51:56,380 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 07:51:56,380 INFO L85 PathProgramCache]: Analyzing trace with hash 810137424, now seen corresponding path program 1 times [2023-01-28 07:51:56,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 07:51:56,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659972407] [2023-01-28 07:51:56,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:51:56,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 07:51:56,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 07:51:56,413 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-28 07:51:56,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 07:51:56,451 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-28 07:51:56,452 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-28 07:51:56,452 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-01-28 07:51:56,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-01-28 07:51:56,457 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-01-28 07:51:56,458 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-01-28 07:51:56,459 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-28 07:51:56,459 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-01-28 07:51:56,470 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-01-28 07:51:56,472 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 119 places, 130 transitions, 272 flow [2023-01-28 07:51:56,482 INFO L130 PetriNetUnfolder]: 24/191 cut-off events. [2023-01-28 07:51:56,483 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-28 07:51:56,484 INFO L83 FinitePrefix]: Finished finitePrefix Result has 201 conditions, 191 events. 24/191 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 501 event pairs, 0 based on Foata normal form. 0/161 useless extension candidates. Maximal degree in co-relation 126. Up to 6 conditions per place. [2023-01-28 07:51:56,484 INFO L82 GeneralOperation]: Start removeDead. Operand has 119 places, 130 transitions, 272 flow [2023-01-28 07:51:56,485 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 119 places, 130 transitions, 272 flow [2023-01-28 07:51:56,485 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 07:51:56,485 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 119 places, 130 transitions, 272 flow [2023-01-28 07:51:56,485 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 119 places, 130 transitions, 272 flow [2023-01-28 07:51:56,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 119 places, 130 transitions, 272 flow [2023-01-28 07:51:56,496 INFO L130 PetriNetUnfolder]: 24/191 cut-off events. [2023-01-28 07:51:56,496 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-28 07:51:56,497 INFO L83 FinitePrefix]: Finished finitePrefix Result has 201 conditions, 191 events. 24/191 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 501 event pairs, 0 based on Foata normal form. 0/161 useless extension candidates. Maximal degree in co-relation 126. Up to 6 conditions per place. [2023-01-28 07:51:56,500 INFO L119 LiptonReduction]: Number of co-enabled transitions 6464 [2023-01-28 07:51:58,426 INFO L134 LiptonReduction]: Checked pairs total: 13025 [2023-01-28 07:51:58,426 INFO L136 LiptonReduction]: Total number of compositions: 101 [2023-01-28 07:51:58,436 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-28 07:51:58,438 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;@7a35f8c1, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 07:51:58,439 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-01-28 07:51:58,440 INFO L130 PetriNetUnfolder]: 0/8 cut-off events. [2023-01-28 07:51:58,440 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 07:51:58,440 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 07:51:58,440 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-01-28 07:51:58,440 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-28 07:51:58,440 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 07:51:58,441 INFO L85 PathProgramCache]: Analyzing trace with hash 22365766, now seen corresponding path program 1 times [2023-01-28 07:51:58,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 07:51:58,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769552341] [2023-01-28 07:51:58,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:51:58,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 07:51:58,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 07:51:58,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 07:51:58,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 07:51:58,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769552341] [2023-01-28 07:51:58,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769552341] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 07:51:58,485 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 07:51:58,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-28 07:51:58,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566199607] [2023-01-28 07:51:58,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 07:51:58,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 07:51:58,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 07:51:58,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 07:51:58,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-28 07:51:58,488 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 231 [2023-01-28 07:51:58,488 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 48 transitions, 108 flow. Second operand has 3 states, 3 states have (on average 105.33333333333333) internal successors, (316), 3 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:51:58,488 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 07:51:58,488 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 231 [2023-01-28 07:51:58,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 07:51:58,632 INFO L130 PetriNetUnfolder]: 1271/2276 cut-off events. [2023-01-28 07:51:58,633 INFO L131 PetriNetUnfolder]: For 20/20 co-relation queries the response was YES. [2023-01-28 07:51:58,635 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4405 conditions, 2276 events. 1271/2276 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 12832 event pairs, 560 based on Foata normal form. 320/2356 useless extension candidates. Maximal degree in co-relation 419. Up to 2062 conditions per place. [2023-01-28 07:51:58,640 INFO L137 encePairwiseOnDemand]: 214/231 looper letters, 34 selfloop transitions, 2 changer transitions 3/45 dead transitions. [2023-01-28 07:51:58,640 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 45 transitions, 178 flow [2023-01-28 07:51:58,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-28 07:51:58,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-28 07:51:58,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 371 transitions. [2023-01-28 07:51:58,641 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5353535353535354 [2023-01-28 07:51:58,641 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 371 transitions. [2023-01-28 07:51:58,641 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 371 transitions. [2023-01-28 07:51:58,641 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 07:51:58,641 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 371 transitions. [2023-01-28 07:51:58,642 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 123.66666666666667) internal successors, (371), 3 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:51:58,643 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 231.0) internal successors, (924), 4 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:51:58,644 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 231.0) internal successors, (924), 4 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:51:58,644 INFO L175 Difference]: Start difference. First operand has 39 places, 48 transitions, 108 flow. Second operand 3 states and 371 transitions. [2023-01-28 07:51:58,644 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 45 transitions, 178 flow [2023-01-28 07:51:58,644 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 45 transitions, 176 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-01-28 07:51:58,645 INFO L231 Difference]: Finished difference. Result has 42 places, 32 transitions, 82 flow [2023-01-28 07:51:58,645 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=231, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=82, PETRI_PLACES=42, PETRI_TRANSITIONS=32} [2023-01-28 07:51:58,645 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 3 predicate places. [2023-01-28 07:51:58,646 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 32 transitions, 82 flow [2023-01-28 07:51:58,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 105.33333333333333) internal successors, (316), 3 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:51:58,646 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 07:51:58,646 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 07:51:58,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-01-28 07:51:58,646 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-28 07:51:58,646 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 07:51:58,646 INFO L85 PathProgramCache]: Analyzing trace with hash 1441717168, now seen corresponding path program 1 times [2023-01-28 07:51:58,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 07:51:58,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65361242] [2023-01-28 07:51:58,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:51:58,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 07:51:58,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 07:51:58,678 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 07:51:58,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 07:51:58,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65361242] [2023-01-28 07:51:58,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65361242] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 07:51:58,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336792247] [2023-01-28 07:51:58,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:51:58,678 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 07:51:58,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 07:51:58,680 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 07:51:58,682 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-01-28 07:51:58,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 07:51:58,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 3 conjunts are in the unsatisfiable core [2023-01-28 07:51:58,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 07:51:58,740 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 07:51:58,740 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 07:51:58,756 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 07:51:58,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [336792247] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 07:51:58,756 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 07:51:58,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2023-01-28 07:51:58,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709551830] [2023-01-28 07:51:58,757 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 07:51:58,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-01-28 07:51:58,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 07:51:58,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-01-28 07:51:58,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-01-28 07:51:58,759 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 231 [2023-01-28 07:51:58,760 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 32 transitions, 82 flow. Second operand has 6 states, 6 states have (on average 106.0) internal successors, (636), 6 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:51:58,760 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 07:51:58,760 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 231 [2023-01-28 07:51:58,760 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 07:51:58,839 INFO L130 PetriNetUnfolder]: 421/742 cut-off events. [2023-01-28 07:51:58,840 INFO L131 PetriNetUnfolder]: For 132/132 co-relation queries the response was YES. [2023-01-28 07:51:58,841 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1614 conditions, 742 events. 421/742 cut-off events. For 132/132 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 3317 event pairs, 80 based on Foata normal form. 100/840 useless extension candidates. Maximal degree in co-relation 1378. Up to 502 conditions per place. [2023-01-28 07:51:58,841 INFO L137 encePairwiseOnDemand]: 228/231 looper letters, 0 selfloop transitions, 0 changer transitions 57/57 dead transitions. [2023-01-28 07:51:58,841 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 57 transitions, 232 flow [2023-01-28 07:51:58,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-28 07:51:58,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-28 07:51:58,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 573 transitions. [2023-01-28 07:51:58,843 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4961038961038961 [2023-01-28 07:51:58,843 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 573 transitions. [2023-01-28 07:51:58,843 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 573 transitions. [2023-01-28 07:51:58,844 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 07:51:58,844 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 573 transitions. [2023-01-28 07:51:58,845 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 114.6) internal successors, (573), 5 states have internal predecessors, (573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:51:58,846 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 231.0) internal successors, (1386), 6 states have internal predecessors, (1386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:51:58,846 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 231.0) internal successors, (1386), 6 states have internal predecessors, (1386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:51:58,846 INFO L175 Difference]: Start difference. First operand has 42 places, 32 transitions, 82 flow. Second operand 5 states and 573 transitions. [2023-01-28 07:51:58,847 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 57 transitions, 232 flow [2023-01-28 07:51:58,848 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 57 transitions, 230 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-01-28 07:51:58,848 INFO L231 Difference]: Finished difference. Result has 39 places, 0 transitions, 0 flow [2023-01-28 07:51:58,849 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=231, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=0, PETRI_PLACES=39, PETRI_TRANSITIONS=0} [2023-01-28 07:51:58,850 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 0 predicate places. [2023-01-28 07:51:58,851 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 0 transitions, 0 flow [2023-01-28 07:51:58,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 106.0) internal successors, (636), 6 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:51:58,852 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-01-28 07:51:58,869 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-01-28 07:51:59,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 07:51:59,057 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-01-28 07:51:59,057 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-01-28 07:51:59,062 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 119 places, 130 transitions, 272 flow [2023-01-28 07:51:59,076 INFO L130 PetriNetUnfolder]: 24/191 cut-off events. [2023-01-28 07:51:59,076 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-28 07:51:59,076 INFO L83 FinitePrefix]: Finished finitePrefix Result has 201 conditions, 191 events. 24/191 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 501 event pairs, 0 based on Foata normal form. 0/161 useless extension candidates. Maximal degree in co-relation 126. Up to 6 conditions per place. [2023-01-28 07:51:59,076 INFO L82 GeneralOperation]: Start removeDead. Operand has 119 places, 130 transitions, 272 flow [2023-01-28 07:51:59,078 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 119 places, 130 transitions, 272 flow [2023-01-28 07:51:59,078 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 07:51:59,078 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 119 places, 130 transitions, 272 flow [2023-01-28 07:51:59,078 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 119 places, 130 transitions, 272 flow [2023-01-28 07:51:59,078 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 119 places, 130 transitions, 272 flow [2023-01-28 07:51:59,087 INFO L130 PetriNetUnfolder]: 24/191 cut-off events. [2023-01-28 07:51:59,087 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-28 07:51:59,087 INFO L83 FinitePrefix]: Finished finitePrefix Result has 201 conditions, 191 events. 24/191 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 501 event pairs, 0 based on Foata normal form. 0/161 useless extension candidates. Maximal degree in co-relation 126. Up to 6 conditions per place. [2023-01-28 07:51:59,090 INFO L119 LiptonReduction]: Number of co-enabled transitions 6464 [2023-01-28 07:52:00,807 INFO L134 LiptonReduction]: Checked pairs total: 13181 [2023-01-28 07:52:00,807 INFO L136 LiptonReduction]: Total number of compositions: 102 [2023-01-28 07:52:00,809 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-01-28 07:52:00,813 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;@7a35f8c1, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 07:52:00,813 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-01-28 07:52:00,816 INFO L130 PetriNetUnfolder]: 12/51 cut-off events. [2023-01-28 07:52:00,816 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-28 07:52:00,816 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 07:52:00,817 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-01-28 07:52:00,818 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 07:52:00,819 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 07:52:00,820 INFO L85 PathProgramCache]: Analyzing trace with hash -953607653, now seen corresponding path program 1 times [2023-01-28 07:52:00,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 07:52:00,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961913028] [2023-01-28 07:52:00,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:52:00,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 07:52:00,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 07:52:00,837 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-28 07:52:00,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 07:52:00,853 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-28 07:52:00,854 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-28 07:52:00,854 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-01-28 07:52:00,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-01-28 07:52:00,854 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-01-28 07:52:00,855 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-01-28 07:52:00,855 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-28 07:52:00,855 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-01-28 07:52:00,873 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-01-28 07:52:00,875 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 148 places, 163 transitions, 347 flow [2023-01-28 07:52:00,889 INFO L130 PetriNetUnfolder]: 34/257 cut-off events. [2023-01-28 07:52:00,889 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-01-28 07:52:00,890 INFO L83 FinitePrefix]: Finished finitePrefix Result has 273 conditions, 257 events. 34/257 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 734 event pairs, 0 based on Foata normal form. 0/215 useless extension candidates. Maximal degree in co-relation 195. Up to 8 conditions per place. [2023-01-28 07:52:00,890 INFO L82 GeneralOperation]: Start removeDead. Operand has 148 places, 163 transitions, 347 flow [2023-01-28 07:52:00,891 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 148 places, 163 transitions, 347 flow [2023-01-28 07:52:00,891 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 07:52:00,892 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 148 places, 163 transitions, 347 flow [2023-01-28 07:52:00,892 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 148 places, 163 transitions, 347 flow [2023-01-28 07:52:00,892 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 148 places, 163 transitions, 347 flow [2023-01-28 07:52:00,907 INFO L130 PetriNetUnfolder]: 34/257 cut-off events. [2023-01-28 07:52:00,908 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-01-28 07:52:00,909 INFO L83 FinitePrefix]: Finished finitePrefix Result has 273 conditions, 257 events. 34/257 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 734 event pairs, 0 based on Foata normal form. 0/215 useless extension candidates. Maximal degree in co-relation 195. Up to 8 conditions per place. [2023-01-28 07:52:00,914 INFO L119 LiptonReduction]: Number of co-enabled transitions 12864 [2023-01-28 07:52:03,117 INFO L134 LiptonReduction]: Checked pairs total: 27704 [2023-01-28 07:52:03,117 INFO L136 LiptonReduction]: Total number of compositions: 120 [2023-01-28 07:52:03,118 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-28 07:52:03,119 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;@7a35f8c1, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 07:52:03,119 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-01-28 07:52:03,120 INFO L130 PetriNetUnfolder]: 0/8 cut-off events. [2023-01-28 07:52:03,120 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 07:52:03,120 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 07:52:03,120 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-01-28 07:52:03,120 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-28 07:52:03,120 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 07:52:03,120 INFO L85 PathProgramCache]: Analyzing trace with hash 35223402, now seen corresponding path program 1 times [2023-01-28 07:52:03,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 07:52:03,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832568446] [2023-01-28 07:52:03,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:52:03,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 07:52:03,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 07:52:03,136 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 07:52:03,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 07:52:03,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832568446] [2023-01-28 07:52:03,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832568446] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 07:52:03,136 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 07:52:03,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-28 07:52:03,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726760887] [2023-01-28 07:52:03,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 07:52:03,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 07:52:03,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 07:52:03,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 07:52:03,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-28 07:52:03,137 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 283 [2023-01-28 07:52:03,138 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 66 transitions, 153 flow. Second operand has 3 states, 3 states have (on average 131.33333333333334) internal successors, (394), 3 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:52:03,138 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 07:52:03,138 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 283 [2023-01-28 07:52:03,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 07:52:04,844 INFO L130 PetriNetUnfolder]: 17895/26602 cut-off events. [2023-01-28 07:52:04,844 INFO L131 PetriNetUnfolder]: For 597/597 co-relation queries the response was YES. [2023-01-28 07:52:04,936 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52210 conditions, 26602 events. 17895/26602 cut-off events. For 597/597 co-relation queries the response was YES. Maximal size of possible extension queue 734. Compared 173491 event pairs, 17081 based on Foata normal form. 4496/29060 useless extension candidates. Maximal degree in co-relation 20257. Up to 25159 conditions per place. [2023-01-28 07:52:04,994 INFO L137 encePairwiseOnDemand]: 260/283 looper letters, 42 selfloop transitions, 2 changer transitions 3/56 dead transitions. [2023-01-28 07:52:04,994 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 56 transitions, 225 flow [2023-01-28 07:52:04,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-28 07:52:04,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-28 07:52:04,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 463 transitions. [2023-01-28 07:52:04,996 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5453474676089517 [2023-01-28 07:52:04,996 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 463 transitions. [2023-01-28 07:52:04,996 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 463 transitions. [2023-01-28 07:52:04,996 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 07:52:04,996 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 463 transitions. [2023-01-28 07:52:04,997 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 154.33333333333334) internal successors, (463), 3 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:52:04,998 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 283.0) internal successors, (1132), 4 states have internal predecessors, (1132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:52:04,999 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 283.0) internal successors, (1132), 4 states have internal predecessors, (1132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:52:04,999 INFO L175 Difference]: Start difference. First operand has 53 places, 66 transitions, 153 flow. Second operand 3 states and 463 transitions. [2023-01-28 07:52:04,999 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 56 transitions, 225 flow [2023-01-28 07:52:05,000 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 56 transitions, 219 flow, removed 3 selfloop flow, removed 0 redundant places. [2023-01-28 07:52:05,001 INFO L231 Difference]: Finished difference. Result has 56 places, 44 transitions, 111 flow [2023-01-28 07:52:05,001 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=283, PETRI_DIFFERENCE_MINUEND_FLOW=107, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=111, PETRI_PLACES=56, PETRI_TRANSITIONS=44} [2023-01-28 07:52:05,002 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 3 predicate places. [2023-01-28 07:52:05,002 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 44 transitions, 111 flow [2023-01-28 07:52:05,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 131.33333333333334) internal successors, (394), 3 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:52:05,003 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 07:52:05,003 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 07:52:05,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-01-28 07:52:05,003 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-28 07:52:05,003 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 07:52:05,003 INFO L85 PathProgramCache]: Analyzing trace with hash 863818165, now seen corresponding path program 1 times [2023-01-28 07:52:05,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 07:52:05,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666196728] [2023-01-28 07:52:05,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:52:05,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 07:52:05,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 07:52:05,041 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 07:52:05,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 07:52:05,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666196728] [2023-01-28 07:52:05,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666196728] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 07:52:05,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409081290] [2023-01-28 07:52:05,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:52:05,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 07:52:05,041 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 07:52:05,042 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 07:52:05,044 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-01-28 07:52:05,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 07:52:05,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 3 conjunts are in the unsatisfiable core [2023-01-28 07:52:05,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 07:52:05,104 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 07:52:05,104 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 07:52:05,117 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 07:52:05,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1409081290] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 07:52:05,118 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 07:52:05,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-01-28 07:52:05,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384872170] [2023-01-28 07:52:05,118 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 07:52:05,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-01-28 07:52:05,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 07:52:05,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-01-28 07:52:05,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-01-28 07:52:05,121 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 283 [2023-01-28 07:52:05,123 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 44 transitions, 111 flow. Second operand has 7 states, 7 states have (on average 132.28571428571428) internal successors, (926), 7 states have internal predecessors, (926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:52:05,123 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 07:52:05,123 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 283 [2023-01-28 07:52:05,123 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 07:52:05,657 INFO L130 PetriNetUnfolder]: 6205/9317 cut-off events. [2023-01-28 07:52:05,657 INFO L131 PetriNetUnfolder]: For 1027/1027 co-relation queries the response was YES. [2023-01-28 07:52:05,664 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19476 conditions, 9317 events. 6205/9317 cut-off events. For 1027/1027 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 55039 event pairs, 77 based on Foata normal form. 909/10225 useless extension candidates. Maximal degree in co-relation 17182. Up to 5958 conditions per place. [2023-01-28 07:52:05,668 INFO L137 encePairwiseOnDemand]: 280/283 looper letters, 0 selfloop transitions, 0 changer transitions 95/95 dead transitions. [2023-01-28 07:52:05,669 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 95 transitions, 385 flow [2023-01-28 07:52:05,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-28 07:52:05,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-28 07:52:05,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 869 transitions. [2023-01-28 07:52:05,670 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5117785630153121 [2023-01-28 07:52:05,670 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 869 transitions. [2023-01-28 07:52:05,670 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 869 transitions. [2023-01-28 07:52:05,671 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 07:52:05,671 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 869 transitions. [2023-01-28 07:52:05,672 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 144.83333333333334) internal successors, (869), 6 states have internal predecessors, (869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:52:05,674 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 283.0) internal successors, (1981), 7 states have internal predecessors, (1981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:52:05,674 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 283.0) internal successors, (1981), 7 states have internal predecessors, (1981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:52:05,674 INFO L175 Difference]: Start difference. First operand has 56 places, 44 transitions, 111 flow. Second operand 6 states and 869 transitions. [2023-01-28 07:52:05,674 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 95 transitions, 385 flow [2023-01-28 07:52:05,676 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 95 transitions, 383 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-01-28 07:52:05,676 INFO L231 Difference]: Finished difference. Result has 54 places, 0 transitions, 0 flow [2023-01-28 07:52:05,676 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=283, PETRI_DIFFERENCE_MINUEND_FLOW=101, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=0, PETRI_PLACES=54, PETRI_TRANSITIONS=0} [2023-01-28 07:52:05,678 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 1 predicate places. [2023-01-28 07:52:05,678 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 0 transitions, 0 flow [2023-01-28 07:52:05,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 132.28571428571428) internal successors, (926), 7 states have internal predecessors, (926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:52:05,678 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-01-28 07:52:05,684 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-01-28 07:52:05,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 07:52:05,882 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-01-28 07:52:05,883 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-01-28 07:52:05,885 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 148 places, 163 transitions, 347 flow [2023-01-28 07:52:05,896 INFO L130 PetriNetUnfolder]: 34/257 cut-off events. [2023-01-28 07:52:05,897 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-01-28 07:52:05,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 273 conditions, 257 events. 34/257 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 734 event pairs, 0 based on Foata normal form. 0/215 useless extension candidates. Maximal degree in co-relation 195. Up to 8 conditions per place. [2023-01-28 07:52:05,898 INFO L82 GeneralOperation]: Start removeDead. Operand has 148 places, 163 transitions, 347 flow [2023-01-28 07:52:05,898 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 148 places, 163 transitions, 347 flow [2023-01-28 07:52:05,898 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 07:52:05,899 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 148 places, 163 transitions, 347 flow [2023-01-28 07:52:05,899 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 148 places, 163 transitions, 347 flow [2023-01-28 07:52:05,899 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 148 places, 163 transitions, 347 flow [2023-01-28 07:52:05,910 INFO L130 PetriNetUnfolder]: 34/257 cut-off events. [2023-01-28 07:52:05,911 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-01-28 07:52:05,911 INFO L83 FinitePrefix]: Finished finitePrefix Result has 273 conditions, 257 events. 34/257 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 734 event pairs, 0 based on Foata normal form. 0/215 useless extension candidates. Maximal degree in co-relation 195. Up to 8 conditions per place. [2023-01-28 07:52:05,918 INFO L119 LiptonReduction]: Number of co-enabled transitions 12864 [2023-01-28 07:52:07,971 INFO L134 LiptonReduction]: Checked pairs total: 27546 [2023-01-28 07:52:07,971 INFO L136 LiptonReduction]: Total number of compositions: 120 [2023-01-28 07:52:07,972 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-01-28 07:52:07,973 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;@7a35f8c1, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 07:52:07,973 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-01-28 07:52:07,977 INFO L130 PetriNetUnfolder]: 18/75 cut-off events. [2023-01-28 07:52:07,977 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-01-28 07:52:07,977 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 07:52:07,978 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-01-28 07:52:07,978 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 07:52:07,978 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 07:52:07,978 INFO L85 PathProgramCache]: Analyzing trace with hash 900972061, now seen corresponding path program 1 times [2023-01-28 07:52:07,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 07:52:07,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366131733] [2023-01-28 07:52:07,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:52:07,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 07:52:07,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 07:52:07,988 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-28 07:52:07,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 07:52:07,998 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-28 07:52:07,998 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-28 07:52:07,998 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-01-28 07:52:07,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-01-28 07:52:07,998 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-01-28 07:52:07,999 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-01-28 07:52:07,999 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-28 07:52:07,999 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-01-28 07:52:08,012 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-01-28 07:52:08,013 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 177 places, 196 transitions, 424 flow [2023-01-28 07:52:08,038 INFO L130 PetriNetUnfolder]: 44/323 cut-off events. [2023-01-28 07:52:08,038 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-01-28 07:52:08,039 INFO L83 FinitePrefix]: Finished finitePrefix Result has 346 conditions, 323 events. 44/323 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 978 event pairs, 0 based on Foata normal form. 0/269 useless extension candidates. Maximal degree in co-relation 265. Up to 10 conditions per place. [2023-01-28 07:52:08,039 INFO L82 GeneralOperation]: Start removeDead. Operand has 177 places, 196 transitions, 424 flow [2023-01-28 07:52:08,041 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 177 places, 196 transitions, 424 flow [2023-01-28 07:52:08,041 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 07:52:08,041 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 177 places, 196 transitions, 424 flow [2023-01-28 07:52:08,041 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 177 places, 196 transitions, 424 flow [2023-01-28 07:52:08,041 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 177 places, 196 transitions, 424 flow [2023-01-28 07:52:08,065 INFO L130 PetriNetUnfolder]: 44/323 cut-off events. [2023-01-28 07:52:08,065 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-01-28 07:52:08,066 INFO L83 FinitePrefix]: Finished finitePrefix Result has 346 conditions, 323 events. 44/323 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 978 event pairs, 0 based on Foata normal form. 0/269 useless extension candidates. Maximal degree in co-relation 265. Up to 10 conditions per place. [2023-01-28 07:52:08,071 INFO L119 LiptonReduction]: Number of co-enabled transitions 21376 [2023-01-28 07:52:10,303 INFO L134 LiptonReduction]: Checked pairs total: 48808 [2023-01-28 07:52:10,303 INFO L136 LiptonReduction]: Total number of compositions: 141 [2023-01-28 07:52:10,304 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-28 07:52:10,304 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;@7a35f8c1, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 07:52:10,304 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-01-28 07:52:10,305 INFO L130 PetriNetUnfolder]: 0/8 cut-off events. [2023-01-28 07:52:10,305 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 07:52:10,305 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 07:52:10,305 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-01-28 07:52:10,305 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-28 07:52:10,305 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 07:52:10,306 INFO L85 PathProgramCache]: Analyzing trace with hash 50305516, now seen corresponding path program 1 times [2023-01-28 07:52:10,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 07:52:10,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239920955] [2023-01-28 07:52:10,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:52:10,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 07:52:10,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 07:52:10,338 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 07:52:10,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 07:52:10,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239920955] [2023-01-28 07:52:10,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239920955] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 07:52:10,339 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 07:52:10,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-28 07:52:10,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487072240] [2023-01-28 07:52:10,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 07:52:10,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 07:52:10,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 07:52:10,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 07:52:10,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-28 07:52:10,340 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 337 [2023-01-28 07:52:10,340 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 84 transitions, 200 flow. Second operand has 3 states, 3 states have (on average 157.33333333333334) internal successors, (472), 3 states have internal predecessors, (472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:52:10,340 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 07:52:10,340 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 337 [2023-01-28 07:52:10,340 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 07:52:39,665 INFO L130 PetriNetUnfolder]: 400899/521434 cut-off events. [2023-01-28 07:52:39,665 INFO L131 PetriNetUnfolder]: For 13880/13880 co-relation queries the response was YES. [2023-01-28 07:52:40,400 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1046823 conditions, 521434 events. 400899/521434 cut-off events. For 13880/13880 co-relation queries the response was YES. Maximal size of possible extension queue 9189. Compared 3402078 event pairs, 295500 based on Foata normal form. 54304/545408 useless extension candidates. Maximal degree in co-relation 83600. Up to 518010 conditions per place. [2023-01-28 07:52:41,480 INFO L137 encePairwiseOnDemand]: 308/337 looper letters, 58 selfloop transitions, 2 changer transitions 3/69 dead transitions. [2023-01-28 07:52:41,480 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 69 transitions, 294 flow [2023-01-28 07:52:41,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-28 07:52:41,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-28 07:52:41,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 563 transitions. [2023-01-28 07:52:41,482 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5568743818001978 [2023-01-28 07:52:41,482 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 563 transitions. [2023-01-28 07:52:41,482 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 563 transitions. [2023-01-28 07:52:41,482 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 07:52:41,482 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 563 transitions. [2023-01-28 07:52:41,483 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 187.66666666666666) internal successors, (563), 3 states have internal predecessors, (563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:52:41,484 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 337.0) internal successors, (1348), 4 states have internal predecessors, (1348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:52:41,484 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 337.0) internal successors, (1348), 4 states have internal predecessors, (1348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:52:41,485 INFO L175 Difference]: Start difference. First operand has 67 places, 84 transitions, 200 flow. Second operand 3 states and 563 transitions. [2023-01-28 07:52:41,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 69 transitions, 294 flow [2023-01-28 07:52:41,492 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 69 transitions, 282 flow, removed 6 selfloop flow, removed 0 redundant places. [2023-01-28 07:52:41,493 INFO L231 Difference]: Finished difference. Result has 70 places, 56 transitions, 140 flow [2023-01-28 07:52:41,493 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=337, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=140, PETRI_PLACES=70, PETRI_TRANSITIONS=56} [2023-01-28 07:52:41,494 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 3 predicate places. [2023-01-28 07:52:41,494 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 56 transitions, 140 flow [2023-01-28 07:52:41,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 157.33333333333334) internal successors, (472), 3 states have internal predecessors, (472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:52:41,494 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 07:52:41,494 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 07:52:41,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-01-28 07:52:41,494 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-28 07:52:41,495 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 07:52:41,495 INFO L85 PathProgramCache]: Analyzing trace with hash -1850672749, now seen corresponding path program 1 times [2023-01-28 07:52:41,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 07:52:41,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499614606] [2023-01-28 07:52:41,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:52:41,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 07:52:41,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 07:52:41,517 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 07:52:41,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 07:52:41,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499614606] [2023-01-28 07:52:41,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499614606] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 07:52:41,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105821165] [2023-01-28 07:52:41,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:52:41,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 07:52:41,517 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 07:52:41,518 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 07:52:41,520 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-01-28 07:52:41,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 07:52:41,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 3 conjunts are in the unsatisfiable core [2023-01-28 07:52:41,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 07:52:41,585 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 07:52:41,585 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 07:52:41,616 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 07:52:41,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1105821165] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 07:52:41,616 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 07:52:41,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-01-28 07:52:41,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904775143] [2023-01-28 07:52:41,616 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 07:52:41,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-01-28 07:52:41,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 07:52:41,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-01-28 07:52:41,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-01-28 07:52:41,617 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 337 [2023-01-28 07:52:41,618 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 56 transitions, 140 flow. Second operand has 7 states, 7 states have (on average 158.28571428571428) internal successors, (1108), 7 states have internal predecessors, (1108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:52:41,618 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 07:52:41,618 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 337 [2023-01-28 07:52:41,618 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 07:53:01,284 INFO L130 PetriNetUnfolder]: 286856/374581 cut-off events. [2023-01-28 07:53:01,284 INFO L131 PetriNetUnfolder]: For 15970/15970 co-relation queries the response was YES. [2023-01-28 07:53:01,913 INFO L83 FinitePrefix]: Finished finitePrefix Result has 777250 conditions, 374581 events. 286856/374581 cut-off events. For 15970/15970 co-relation queries the response was YES. Maximal size of possible extension queue 6935. Compared 2468291 event pairs, 12100 based on Foata normal form. 1330/375911 useless extension candidates. Maximal degree in co-relation 79396. Up to 246357 conditions per place. [2023-01-28 07:53:03,055 INFO L137 encePairwiseOnDemand]: 333/337 looper letters, 146 selfloop transitions, 5 changer transitions 1/158 dead transitions. [2023-01-28 07:53:03,055 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 158 transitions, 652 flow [2023-01-28 07:53:03,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-28 07:53:03,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-28 07:53:03,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1091 transitions. [2023-01-28 07:53:03,057 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.539564787339268 [2023-01-28 07:53:03,057 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1091 transitions. [2023-01-28 07:53:03,057 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1091 transitions. [2023-01-28 07:53:03,058 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 07:53:03,058 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1091 transitions. [2023-01-28 07:53:03,059 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 181.83333333333334) internal successors, (1091), 6 states have internal predecessors, (1091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:53:03,061 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 337.0) internal successors, (2359), 7 states have internal predecessors, (2359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:53:03,062 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 337.0) internal successors, (2359), 7 states have internal predecessors, (2359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:53:03,062 INFO L175 Difference]: Start difference. First operand has 70 places, 56 transitions, 140 flow. Second operand 6 states and 1091 transitions. [2023-01-28 07:53:03,062 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 158 transitions, 652 flow [2023-01-28 07:53:03,107 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 158 transitions, 650 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-01-28 07:53:03,108 INFO L231 Difference]: Finished difference. Result has 75 places, 58 transitions, 172 flow [2023-01-28 07:53:03,108 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=337, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=172, PETRI_PLACES=75, PETRI_TRANSITIONS=58} [2023-01-28 07:53:03,109 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 8 predicate places. [2023-01-28 07:53:03,109 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 58 transitions, 172 flow [2023-01-28 07:53:03,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 158.28571428571428) internal successors, (1108), 7 states have internal predecessors, (1108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:53:03,109 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 07:53:03,109 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 07:53:03,129 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-01-28 07:53:03,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 07:53:03,314 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-28 07:53:03,314 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 07:53:03,314 INFO L85 PathProgramCache]: Analyzing trace with hash 586565954, now seen corresponding path program 1 times [2023-01-28 07:53:03,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 07:53:03,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906319231] [2023-01-28 07:53:03,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:53:03,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 07:53:03,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 07:53:03,392 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 07:53:03,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 07:53:03,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906319231] [2023-01-28 07:53:03,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906319231] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 07:53:03,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1618138652] [2023-01-28 07:53:03,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:53:03,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 07:53:03,393 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 07:53:03,394 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 07:53:03,396 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-01-28 07:53:03,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 07:53:03,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-28 07:53:03,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 07:53:03,493 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 07:53:03,493 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 07:53:03,547 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 07:53:03,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1618138652] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 07:53:03,547 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 07:53:03,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-01-28 07:53:03,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838892559] [2023-01-28 07:53:03,549 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 07:53:03,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-01-28 07:53:03,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 07:53:03,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-01-28 07:53:03,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-01-28 07:53:03,551 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 337 [2023-01-28 07:53:03,552 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 58 transitions, 172 flow. Second operand has 13 states, 13 states have (on average 158.6153846153846) internal successors, (2062), 13 states have internal predecessors, (2062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:53:03,552 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 07:53:03,552 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 337 [2023-01-28 07:53:03,552 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 07:53:10,768 INFO L130 PetriNetUnfolder]: 93740/127015 cut-off events. [2023-01-28 07:53:10,769 INFO L131 PetriNetUnfolder]: For 102480/102480 co-relation queries the response was YES. [2023-01-28 07:53:11,024 INFO L83 FinitePrefix]: Finished finitePrefix Result has 300614 conditions, 127015 events. 93740/127015 cut-off events. For 102480/102480 co-relation queries the response was YES. Maximal size of possible extension queue 2754. Compared 804099 event pairs, 0 based on Foata normal form. 13310/140325 useless extension candidates. Maximal degree in co-relation 32467. Up to 61589 conditions per place. [2023-01-28 07:53:11,090 INFO L137 encePairwiseOnDemand]: 334/337 looper letters, 0 selfloop transitions, 0 changer transitions 154/154 dead transitions. [2023-01-28 07:53:11,090 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 154 transitions, 658 flow [2023-01-28 07:53:11,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-01-28 07:53:11,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-01-28 07:53:11,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1241 transitions. [2023-01-28 07:53:11,116 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5260703688003391 [2023-01-28 07:53:11,116 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1241 transitions. [2023-01-28 07:53:11,116 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1241 transitions. [2023-01-28 07:53:11,116 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 07:53:11,116 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1241 transitions. [2023-01-28 07:53:11,118 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 177.28571428571428) internal successors, (1241), 7 states have internal predecessors, (1241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:53:11,122 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 337.0) internal successors, (2696), 8 states have internal predecessors, (2696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:53:11,123 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 337.0) internal successors, (2696), 8 states have internal predecessors, (2696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:53:11,123 INFO L175 Difference]: Start difference. First operand has 75 places, 58 transitions, 172 flow. Second operand 7 states and 1241 transitions. [2023-01-28 07:53:11,123 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 154 transitions, 658 flow [2023-01-28 07:53:11,367 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 154 transitions, 639 flow, removed 3 selfloop flow, removed 7 redundant places. [2023-01-28 07:53:11,368 INFO L231 Difference]: Finished difference. Result has 71 places, 0 transitions, 0 flow [2023-01-28 07:53:11,368 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=337, PETRI_DIFFERENCE_MINUEND_FLOW=139, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=0, PETRI_PLACES=71, PETRI_TRANSITIONS=0} [2023-01-28 07:53:11,368 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 4 predicate places. [2023-01-28 07:53:11,368 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 0 transitions, 0 flow [2023-01-28 07:53:11,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 158.6153846153846) internal successors, (2062), 13 states have internal predecessors, (2062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:53:11,369 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-01-28 07:53:11,373 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-01-28 07:53:11,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-01-28 07:53:11,573 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-01-28 07:53:11,574 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-01-28 07:53:11,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 177 places, 196 transitions, 424 flow [2023-01-28 07:53:11,593 INFO L130 PetriNetUnfolder]: 44/323 cut-off events. [2023-01-28 07:53:11,593 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-01-28 07:53:11,594 INFO L83 FinitePrefix]: Finished finitePrefix Result has 346 conditions, 323 events. 44/323 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 978 event pairs, 0 based on Foata normal form. 0/269 useless extension candidates. Maximal degree in co-relation 265. Up to 10 conditions per place. [2023-01-28 07:53:11,595 INFO L82 GeneralOperation]: Start removeDead. Operand has 177 places, 196 transitions, 424 flow [2023-01-28 07:53:11,596 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 177 places, 196 transitions, 424 flow [2023-01-28 07:53:11,596 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 07:53:11,596 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 177 places, 196 transitions, 424 flow [2023-01-28 07:53:11,596 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 177 places, 196 transitions, 424 flow [2023-01-28 07:53:11,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 177 places, 196 transitions, 424 flow [2023-01-28 07:53:11,614 INFO L130 PetriNetUnfolder]: 44/323 cut-off events. [2023-01-28 07:53:11,614 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-01-28 07:53:11,615 INFO L83 FinitePrefix]: Finished finitePrefix Result has 346 conditions, 323 events. 44/323 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 978 event pairs, 0 based on Foata normal form. 0/269 useless extension candidates. Maximal degree in co-relation 265. Up to 10 conditions per place. [2023-01-28 07:53:11,620 INFO L119 LiptonReduction]: Number of co-enabled transitions 21376 [2023-01-28 07:53:13,419 INFO L134 LiptonReduction]: Checked pairs total: 49468 [2023-01-28 07:53:13,419 INFO L136 LiptonReduction]: Total number of compositions: 142 [2023-01-28 07:53:13,420 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-01-28 07:53:13,420 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;@7a35f8c1, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 07:53:13,420 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-01-28 07:53:13,425 INFO L130 PetriNetUnfolder]: 28/107 cut-off events. [2023-01-28 07:53:13,425 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-01-28 07:53:13,425 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 07:53:13,425 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2023-01-28 07:53:13,425 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 07:53:13,425 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 07:53:13,425 INFO L85 PathProgramCache]: Analyzing trace with hash 1692953136, now seen corresponding path program 1 times [2023-01-28 07:53:13,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 07:53:13,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384614878] [2023-01-28 07:53:13,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:53:13,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 07:53:13,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 07:53:13,450 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-28 07:53:13,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 07:53:13,468 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-28 07:53:13,468 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-28 07:53:13,469 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-01-28 07:53:13,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-01-28 07:53:13,469 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-01-28 07:53:13,469 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-01-28 07:53:13,469 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-28 07:53:13,470 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-01-28 07:53:13,494 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-01-28 07:53:13,496 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 206 places, 229 transitions, 503 flow [2023-01-28 07:53:13,526 INFO L130 PetriNetUnfolder]: 54/389 cut-off events. [2023-01-28 07:53:13,527 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-01-28 07:53:13,529 INFO L83 FinitePrefix]: Finished finitePrefix Result has 420 conditions, 389 events. 54/389 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 1207 event pairs, 0 based on Foata normal form. 0/323 useless extension candidates. Maximal degree in co-relation 336. Up to 12 conditions per place. [2023-01-28 07:53:13,529 INFO L82 GeneralOperation]: Start removeDead. Operand has 206 places, 229 transitions, 503 flow [2023-01-28 07:53:13,531 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 206 places, 229 transitions, 503 flow [2023-01-28 07:53:13,531 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 07:53:13,531 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 206 places, 229 transitions, 503 flow [2023-01-28 07:53:13,531 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 206 places, 229 transitions, 503 flow [2023-01-28 07:53:13,531 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 206 places, 229 transitions, 503 flow [2023-01-28 07:53:13,720 INFO L130 PetriNetUnfolder]: 54/389 cut-off events. [2023-01-28 07:53:13,720 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-01-28 07:53:13,722 INFO L83 FinitePrefix]: Finished finitePrefix Result has 420 conditions, 389 events. 54/389 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 1207 event pairs, 0 based on Foata normal form. 0/323 useless extension candidates. Maximal degree in co-relation 336. Up to 12 conditions per place. [2023-01-28 07:53:13,728 INFO L119 LiptonReduction]: Number of co-enabled transitions 32000 [2023-01-28 07:53:15,516 INFO L134 LiptonReduction]: Checked pairs total: 73111 [2023-01-28 07:53:15,516 INFO L136 LiptonReduction]: Total number of compositions: 160 [2023-01-28 07:53:15,517 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-28 07:53:15,517 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;@7a35f8c1, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 07:53:15,518 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-01-28 07:53:15,518 INFO L130 PetriNetUnfolder]: 0/8 cut-off events. [2023-01-28 07:53:15,518 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 07:53:15,518 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 07:53:15,519 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-01-28 07:53:15,519 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-28 07:53:15,519 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 07:53:15,519 INFO L85 PathProgramCache]: Analyzing trace with hash 67656999, now seen corresponding path program 1 times [2023-01-28 07:53:15,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 07:53:15,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711977478] [2023-01-28 07:53:15,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 07:53:15,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 07:53:15,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 07:53:15,551 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 07:53:15,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 07:53:15,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711977478] [2023-01-28 07:53:15,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711977478] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 07:53:15,551 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 07:53:15,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-28 07:53:15,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990810723] [2023-01-28 07:53:15,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 07:53:15,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 07:53:15,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 07:53:15,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 07:53:15,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-28 07:53:15,552 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 389 [2023-01-28 07:53:15,553 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 102 transitions, 249 flow. Second operand has 3 states, 3 states have (on average 183.33333333333334) internal successors, (550), 3 states have internal predecessors, (550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 07:53:15,553 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 07:53:15,553 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 389 [2023-01-28 07:53:15,553 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand