/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_02-simple_racefree.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-b8dbc81 [2023-01-27 19:04:40,566 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-01-27 19:04:40,568 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-01-27 19:04:40,596 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-01-27 19:04:40,596 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-01-27 19:04:40,598 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-01-27 19:04:40,601 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-01-27 19:04:40,603 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-01-27 19:04:40,604 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-01-27 19:04:40,607 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-01-27 19:04:40,608 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-01-27 19:04:40,609 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-01-27 19:04:40,609 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-01-27 19:04:40,611 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-01-27 19:04:40,612 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-01-27 19:04:40,613 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-01-27 19:04:40,613 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-01-27 19:04:40,614 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-01-27 19:04:40,615 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-01-27 19:04:40,619 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-01-27 19:04:40,619 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-01-27 19:04:40,620 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-01-27 19:04:40,621 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-01-27 19:04:40,622 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-01-27 19:04:40,628 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-01-27 19:04:40,633 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-01-27 19:04:40,634 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-01-27 19:04:40,634 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-01-27 19:04:40,635 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf [2023-01-27 19:04:40,657 INFO L113 SettingsManager]: Loading preferences was successful [2023-01-27 19:04:40,657 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-01-27 19:04:40,658 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-01-27 19:04:40,658 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-01-27 19:04:40,659 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-01-27 19:04:40,659 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-01-27 19:04:40,659 INFO L138 SettingsManager]: * Use SBE=true [2023-01-27 19:04:40,659 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-01-27 19:04:40,659 INFO L138 SettingsManager]: * sizeof long=4 [2023-01-27 19:04:40,659 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-01-27 19:04:40,660 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-01-27 19:04:40,660 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-01-27 19:04:40,660 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-01-27 19:04:40,660 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-01-27 19:04:40,660 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-01-27 19:04:40,660 INFO L138 SettingsManager]: * sizeof long double=12 [2023-01-27 19:04:40,661 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-01-27 19:04:40,661 INFO L138 SettingsManager]: * Use constant arrays=true [2023-01-27 19:04:40,661 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-01-27 19:04:40,661 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-01-27 19:04:40,661 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-01-27 19:04:40,661 INFO L138 SettingsManager]: * To the following directory=./dump/ [2023-01-27 19:04:40,661 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-01-27 19:04:40,661 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-27 19:04:40,661 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-01-27 19:04:40,661 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-01-27 19:04:40,662 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-01-27 19:04:40,662 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-01-27 19:04:40,662 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-01-27 19:04:40,662 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-01-27 19:04:40,662 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-01-27 19:04:40,662 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-01-27 19:04:40,847 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-01-27 19:04:40,866 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-01-27 19:04:40,868 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-01-27 19:04:40,868 INFO L271 PluginConnector]: Initializing CDTParser... [2023-01-27 19:04:40,869 INFO L275 PluginConnector]: CDTParser initialized [2023-01-27 19:04:40,869 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_02-simple_racefree.i [2023-01-27 19:04:41,959 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-01-27 19:04:42,155 INFO L351 CDTParser]: Found 1 translation units. [2023-01-27 19:04:42,155 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_02-simple_racefree.i [2023-01-27 19:04:42,167 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e5b542920/35bf438c9ff047fa93c3f4d7f4e5e84e/FLAG4492c1b56 [2023-01-27 19:04:42,176 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e5b542920/35bf438c9ff047fa93c3f4d7f4e5e84e [2023-01-27 19:04:42,178 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-01-27 19:04:42,179 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2023-01-27 19:04:42,179 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-01-27 19:04:42,179 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-01-27 19:04:42,181 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-01-27 19:04:42,182 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 07:04:42" (1/1) ... [2023-01-27 19:04:42,182 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@495d6347 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:04:42, skipping insertion in model container [2023-01-27 19:04:42,182 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 07:04:42" (1/1) ... [2023-01-27 19:04:42,187 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-01-27 19:04:42,211 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-01-27 19:04:42,362 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_02-simple_racefree.i[30176,30189] [2023-01-27 19:04:42,373 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-27 19:04:42,381 INFO L203 MainTranslator]: Completed pre-run [2023-01-27 19:04:42,405 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_02-simple_racefree.i[30176,30189] [2023-01-27 19:04:42,410 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-27 19:04:42,433 INFO L208 MainTranslator]: Completed translation [2023-01-27 19:04:42,434 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:04:42 WrapperNode [2023-01-27 19:04:42,434 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-01-27 19:04:42,434 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-01-27 19:04:42,435 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-01-27 19:04:42,435 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-01-27 19:04:42,439 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:04:42" (1/1) ... [2023-01-27 19:04:42,447 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:04:42" (1/1) ... [2023-01-27 19:04:42,459 INFO L138 Inliner]: procedures = 170, calls = 30, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 80 [2023-01-27 19:04:42,459 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-01-27 19:04:42,460 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-01-27 19:04:42,460 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-01-27 19:04:42,460 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-01-27 19:04:42,465 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:04:42" (1/1) ... [2023-01-27 19:04:42,465 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:04:42" (1/1) ... [2023-01-27 19:04:42,467 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:04:42" (1/1) ... [2023-01-27 19:04:42,467 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:04:42" (1/1) ... [2023-01-27 19:04:42,470 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:04:42" (1/1) ... [2023-01-27 19:04:42,473 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:04:42" (1/1) ... [2023-01-27 19:04:42,473 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:04:42" (1/1) ... [2023-01-27 19:04:42,474 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:04:42" (1/1) ... [2023-01-27 19:04:42,476 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-01-27 19:04:42,476 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-01-27 19:04:42,477 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-01-27 19:04:42,477 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-01-27 19:04:42,477 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:04:42" (1/1) ... [2023-01-27 19:04:42,481 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-27 19:04:42,489 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 19:04:42,498 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-01-27 19:04:42,518 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-01-27 19:04:42,541 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-01-27 19:04:42,542 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-01-27 19:04:42,542 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-01-27 19:04:42,542 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-01-27 19:04:42,542 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-01-27 19:04:42,542 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-01-27 19:04:42,542 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-01-27 19:04:42,542 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-01-27 19:04:42,542 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-01-27 19:04:42,543 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-01-27 19:04:42,544 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-01-27 19:04:42,545 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-01-27 19:04:42,666 INFO L236 CfgBuilder]: Building ICFG [2023-01-27 19:04:42,667 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-01-27 19:04:42,860 INFO L277 CfgBuilder]: Performing block encoding [2023-01-27 19:04:42,865 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-01-27 19:04:42,865 INFO L302 CfgBuilder]: Removed 10 assume(true) statements. [2023-01-27 19:04:42,866 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 07:04:42 BoogieIcfgContainer [2023-01-27 19:04:42,866 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-01-27 19:04:42,868 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-01-27 19:04:42,868 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-01-27 19:04:42,870 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-01-27 19:04:42,870 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.01 07:04:42" (1/3) ... [2023-01-27 19:04:42,870 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fd1f33b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 07:04:42, skipping insertion in model container [2023-01-27 19:04:42,870 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:04:42" (2/3) ... [2023-01-27 19:04:42,870 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fd1f33b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 07:04:42, skipping insertion in model container [2023-01-27 19:04:42,871 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 07:04:42" (3/3) ... [2023-01-27 19:04:42,871 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_02-simple_racefree.i [2023-01-27 19:04:42,890 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-01-27 19:04:42,890 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-01-27 19:04:42,890 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-01-27 19:04:42,957 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-01-27 19:04:42,989 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 99 places, 108 transitions, 224 flow [2023-01-27 19:04:43,035 INFO L130 PetriNetUnfolder]: 17/141 cut-off events. [2023-01-27 19:04:43,035 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-01-27 19:04:43,040 INFO L83 FinitePrefix]: Finished finitePrefix Result has 147 conditions, 141 events. 17/141 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 302 event pairs, 0 based on Foata normal form. 0/119 useless extension candidates. Maximal degree in co-relation 68. Up to 4 conditions per place. [2023-01-27 19:04:43,040 INFO L82 GeneralOperation]: Start removeDead. Operand has 99 places, 108 transitions, 224 flow [2023-01-27 19:04:43,044 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 95 places, 103 transitions, 211 flow [2023-01-27 19:04:43,046 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-27 19:04:43,062 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 95 places, 103 transitions, 211 flow [2023-01-27 19:04:43,064 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 95 places, 103 transitions, 211 flow [2023-01-27 19:04:43,064 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 95 places, 103 transitions, 211 flow [2023-01-27 19:04:43,102 INFO L130 PetriNetUnfolder]: 16/136 cut-off events. [2023-01-27 19:04:43,103 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-27 19:04:43,103 INFO L83 FinitePrefix]: Finished finitePrefix Result has 141 conditions, 136 events. 16/136 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 287 event pairs, 0 based on Foata normal form. 0/114 useless extension candidates. Maximal degree in co-relation 68. Up to 4 conditions per place. [2023-01-27 19:04:43,104 INFO L119 LiptonReduction]: Number of co-enabled transitions 2184 [2023-01-27 19:04:45,136 INFO L134 LiptonReduction]: Checked pairs total: 3620 [2023-01-27 19:04:45,136 INFO L136 LiptonReduction]: Total number of compositions: 88 [2023-01-27 19:04:45,145 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-27 19:04:45,149 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;@70681e57, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-27 19:04:45,149 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-01-27 19:04:45,165 INFO L130 PetriNetUnfolder]: 1/10 cut-off events. [2023-01-27 19:04:45,166 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-27 19:04:45,166 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:04:45,166 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-01-27 19:04:45,167 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:04:45,170 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:04:45,170 INFO L85 PathProgramCache]: Analyzing trace with hash 12787872, now seen corresponding path program 1 times [2023-01-27 19:04:45,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:04:45,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583139697] [2023-01-27 19:04:45,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:04:45,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:04:45,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:04:45,384 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:04:45,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:04:45,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583139697] [2023-01-27 19:04:45,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583139697] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 19:04:45,385 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 19:04:45,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-27 19:04:45,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262721125] [2023-01-27 19:04:45,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 19:04:45,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 19:04:45,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:04:45,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 19:04:45,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 19:04:45,415 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 196 [2023-01-27 19:04:45,417 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 30 transitions, 65 flow. Second operand has 3 states, 3 states have (on average 88.33333333333333) internal successors, (265), 3 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:04:45,417 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:04:45,417 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 196 [2023-01-27 19:04:45,418 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:04:45,493 INFO L130 PetriNetUnfolder]: 72/174 cut-off events. [2023-01-27 19:04:45,493 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-27 19:04:45,494 INFO L83 FinitePrefix]: Finished finitePrefix Result has 352 conditions, 174 events. 72/174 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 687 event pairs, 0 based on Foata normal form. 10/166 useless extension candidates. Maximal degree in co-relation 323. Up to 154 conditions per place. [2023-01-27 19:04:45,496 INFO L137 encePairwiseOnDemand]: 184/196 looper letters, 22 selfloop transitions, 2 changer transitions 4/30 dead transitions. [2023-01-27 19:04:45,496 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 30 transitions, 121 flow [2023-01-27 19:04:45,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 19:04:45,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 19:04:45,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 305 transitions. [2023-01-27 19:04:45,511 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5187074829931972 [2023-01-27 19:04:45,511 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 305 transitions. [2023-01-27 19:04:45,512 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 305 transitions. [2023-01-27 19:04:45,514 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:04:45,516 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 305 transitions. [2023-01-27 19:04:45,519 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 101.66666666666667) internal successors, (305), 3 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:04:45,521 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 196.0) internal successors, (784), 4 states have internal predecessors, (784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:04:45,522 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 196.0) internal successors, (784), 4 states have internal predecessors, (784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:04:45,523 INFO L175 Difference]: Start difference. First operand has 25 places, 30 transitions, 65 flow. Second operand 3 states and 305 transitions. [2023-01-27 19:04:45,523 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 30 transitions, 121 flow [2023-01-27 19:04:45,525 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 30 transitions, 121 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-01-27 19:04:45,526 INFO L231 Difference]: Finished difference. Result has 27 places, 17 transitions, 47 flow [2023-01-27 19:04:45,527 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=196, 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=17} [2023-01-27 19:04:45,529 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 2 predicate places. [2023-01-27 19:04:45,529 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 17 transitions, 47 flow [2023-01-27 19:04:45,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 88.33333333333333) internal successors, (265), 3 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:04:45,529 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:04:45,529 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-01-27 19:04:45,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-01-27 19:04:45,530 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:04:45,530 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:04:45,530 INFO L85 PathProgramCache]: Analyzing trace with hash -601168239, now seen corresponding path program 1 times [2023-01-27 19:04:45,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:04:45,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279872196] [2023-01-27 19:04:45,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:04:45,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:04:45,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 19:04:45,551 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-27 19:04:45,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 19:04:45,573 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-27 19:04:45,573 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-27 19:04:45,574 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-01-27 19:04:45,575 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-01-27 19:04:45,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-01-27 19:04:45,576 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-01-27 19:04:45,577 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-27 19:04:45,577 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-01-27 19:04:45,589 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-01-27 19:04:45,591 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 124 places, 138 transitions, 294 flow [2023-01-27 19:04:45,611 INFO L130 PetriNetUnfolder]: 31/228 cut-off events. [2023-01-27 19:04:45,611 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-01-27 19:04:45,619 INFO L83 FinitePrefix]: Finished finitePrefix Result has 242 conditions, 228 events. 31/228 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 596 event pairs, 0 based on Foata normal form. 0/190 useless extension candidates. Maximal degree in co-relation 143. Up to 8 conditions per place. [2023-01-27 19:04:45,619 INFO L82 GeneralOperation]: Start removeDead. Operand has 124 places, 138 transitions, 294 flow [2023-01-27 19:04:45,621 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 124 places, 138 transitions, 294 flow [2023-01-27 19:04:45,621 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-27 19:04:45,622 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 124 places, 138 transitions, 294 flow [2023-01-27 19:04:45,622 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 124 places, 138 transitions, 294 flow [2023-01-27 19:04:45,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 124 places, 138 transitions, 294 flow [2023-01-27 19:04:45,642 INFO L130 PetriNetUnfolder]: 31/228 cut-off events. [2023-01-27 19:04:45,643 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-01-27 19:04:45,644 INFO L83 FinitePrefix]: Finished finitePrefix Result has 242 conditions, 228 events. 31/228 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 596 event pairs, 0 based on Foata normal form. 0/190 useless extension candidates. Maximal degree in co-relation 143. Up to 8 conditions per place. [2023-01-27 19:04:45,648 INFO L119 LiptonReduction]: Number of co-enabled transitions 6552 [2023-01-27 19:04:47,817 INFO L134 LiptonReduction]: Checked pairs total: 17421 [2023-01-27 19:04:47,817 INFO L136 LiptonReduction]: Total number of compositions: 97 [2023-01-27 19:04:47,818 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-27 19:04:47,819 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;@70681e57, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-27 19:04:47,819 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-01-27 19:04:47,821 INFO L130 PetriNetUnfolder]: 1/11 cut-off events. [2023-01-27 19:04:47,821 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-27 19:04:47,821 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:04:47,821 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-01-27 19:04:47,821 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:04:47,821 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:04:47,821 INFO L85 PathProgramCache]: Analyzing trace with hash 20949202, now seen corresponding path program 1 times [2023-01-27 19:04:47,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:04:47,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164106254] [2023-01-27 19:04:47,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:04:47,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:04:47,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:04:47,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:04:47,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:04:47,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164106254] [2023-01-27 19:04:47,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164106254] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 19:04:47,852 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 19:04:47,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-27 19:04:47,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191188873] [2023-01-27 19:04:47,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 19:04:47,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 19:04:47,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:04:47,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 19:04:47,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 19:04:47,853 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 235 [2023-01-27 19:04:47,853 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 57 transitions, 132 flow. Second operand has 3 states, 3 states have (on average 110.33333333333333) internal successors, (331), 3 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:04:47,853 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:04:47,854 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 235 [2023-01-27 19:04:47,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:04:48,007 INFO L130 PetriNetUnfolder]: 1376/2456 cut-off events. [2023-01-27 19:04:48,008 INFO L131 PetriNetUnfolder]: For 44/44 co-relation queries the response was YES. [2023-01-27 19:04:48,010 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4780 conditions, 2456 events. 1376/2456 cut-off events. For 44/44 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 14736 event pairs, 648 based on Foata normal form. 555/2693 useless extension candidates. Maximal degree in co-relation 639. Up to 2257 conditions per place. [2023-01-27 19:04:48,014 INFO L137 encePairwiseOnDemand]: 217/235 looper letters, 28 selfloop transitions, 2 changer transitions 10/50 dead transitions. [2023-01-27 19:04:48,014 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 50 transitions, 196 flow [2023-01-27 19:04:48,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 19:04:48,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 19:04:48,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 388 transitions. [2023-01-27 19:04:48,016 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.550354609929078 [2023-01-27 19:04:48,016 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 388 transitions. [2023-01-27 19:04:48,016 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 388 transitions. [2023-01-27 19:04:48,016 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:04:48,016 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 388 transitions. [2023-01-27 19:04:48,017 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 129.33333333333334) internal successors, (388), 3 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:04:48,018 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 235.0) internal successors, (940), 4 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:04:48,019 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 235.0) internal successors, (940), 4 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:04:48,019 INFO L175 Difference]: Start difference. First operand has 45 places, 57 transitions, 132 flow. Second operand 3 states and 388 transitions. [2023-01-27 19:04:48,019 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 50 transitions, 196 flow [2023-01-27 19:04:48,020 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 50 transitions, 196 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-01-27 19:04:48,020 INFO L231 Difference]: Finished difference. Result has 48 places, 33 transitions, 88 flow [2023-01-27 19:04:48,020 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=235, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=88, PETRI_PLACES=48, PETRI_TRANSITIONS=33} [2023-01-27 19:04:48,021 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 3 predicate places. [2023-01-27 19:04:48,021 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 33 transitions, 88 flow [2023-01-27 19:04:48,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 110.33333333333333) internal successors, (331), 3 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:04:48,021 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:04:48,021 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 19:04:48,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-01-27 19:04:48,022 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:04:48,022 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:04:48,022 INFO L85 PathProgramCache]: Analyzing trace with hash -1477495966, now seen corresponding path program 1 times [2023-01-27 19:04:48,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:04:48,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72354185] [2023-01-27 19:04:48,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:04:48,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:04:48,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:04:48,069 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:04:48,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:04:48,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72354185] [2023-01-27 19:04:48,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72354185] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 19:04:48,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22042328] [2023-01-27 19:04:48,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:04:48,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:04:48,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 19:04:48,072 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 19:04:48,091 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-01-27 19:04:48,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:04:48,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 3 conjunts are in the unsatisfiable core [2023-01-27 19:04:48,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 19:04:48,168 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:04:48,168 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 19:04:48,181 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:04:48,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [22042328] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 19:04:48,182 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 19:04:48,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-01-27 19:04:48,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270737994] [2023-01-27 19:04:48,182 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 19:04:48,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-01-27 19:04:48,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:04:48,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-01-27 19:04:48,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-01-27 19:04:48,183 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 235 [2023-01-27 19:04:48,184 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 33 transitions, 88 flow. Second operand has 7 states, 7 states have (on average 111.28571428571429) internal successors, (779), 7 states have internal predecessors, (779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:04:48,184 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:04:48,184 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 235 [2023-01-27 19:04:48,184 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:04:48,253 INFO L130 PetriNetUnfolder]: 286/565 cut-off events. [2023-01-27 19:04:48,254 INFO L131 PetriNetUnfolder]: For 155/155 co-relation queries the response was YES. [2023-01-27 19:04:48,254 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1206 conditions, 565 events. 286/565 cut-off events. For 155/155 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 2711 event pairs, 99 based on Foata normal form. 70/632 useless extension candidates. Maximal degree in co-relation 974. Up to 346 conditions per place. [2023-01-27 19:04:48,256 INFO L137 encePairwiseOnDemand]: 232/235 looper letters, 39 selfloop transitions, 3 changer transitions 0/52 dead transitions. [2023-01-27 19:04:48,256 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 52 transitions, 208 flow [2023-01-27 19:04:48,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-27 19:04:48,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-27 19:04:48,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 589 transitions. [2023-01-27 19:04:48,258 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5012765957446809 [2023-01-27 19:04:48,258 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 589 transitions. [2023-01-27 19:04:48,258 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 589 transitions. [2023-01-27 19:04:48,258 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:04:48,258 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 589 transitions. [2023-01-27 19:04:48,259 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 117.8) internal successors, (589), 5 states have internal predecessors, (589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:04:48,261 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 235.0) internal successors, (1410), 6 states have internal predecessors, (1410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:04:48,261 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 235.0) internal successors, (1410), 6 states have internal predecessors, (1410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:04:48,261 INFO L175 Difference]: Start difference. First operand has 48 places, 33 transitions, 88 flow. Second operand 5 states and 589 transitions. [2023-01-27 19:04:48,261 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 52 transitions, 208 flow [2023-01-27 19:04:48,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 52 transitions, 204 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-01-27 19:04:48,263 INFO L231 Difference]: Finished difference. Result has 40 places, 30 transitions, 82 flow [2023-01-27 19:04:48,263 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=235, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=82, PETRI_PLACES=40, PETRI_TRANSITIONS=30} [2023-01-27 19:04:48,264 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, -5 predicate places. [2023-01-27 19:04:48,264 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 30 transitions, 82 flow [2023-01-27 19:04:48,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 111.28571428571429) internal successors, (779), 7 states have internal predecessors, (779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:04:48,264 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:04:48,264 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-01-27 19:04:48,286 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-01-27 19:04:48,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:04:48,469 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:04:48,470 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:04:48,470 INFO L85 PathProgramCache]: Analyzing trace with hash -1661799328, now seen corresponding path program 1 times [2023-01-27 19:04:48,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:04:48,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874844901] [2023-01-27 19:04:48,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:04:48,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:04:48,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 19:04:48,485 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-27 19:04:48,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 19:04:48,495 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-27 19:04:48,495 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-27 19:04:48,495 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-01-27 19:04:48,495 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-01-27 19:04:48,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-01-27 19:04:48,495 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-01-27 19:04:48,496 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-27 19:04:48,496 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-01-27 19:04:48,507 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-01-27 19:04:48,509 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 149 places, 168 transitions, 366 flow [2023-01-27 19:04:48,528 INFO L130 PetriNetUnfolder]: 50/346 cut-off events. [2023-01-27 19:04:48,529 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-01-27 19:04:48,530 INFO L83 FinitePrefix]: Finished finitePrefix Result has 374 conditions, 346 events. 50/346 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1041 event pairs, 1 based on Foata normal form. 0/288 useless extension candidates. Maximal degree in co-relation 236. Up to 16 conditions per place. [2023-01-27 19:04:48,530 INFO L82 GeneralOperation]: Start removeDead. Operand has 149 places, 168 transitions, 366 flow [2023-01-27 19:04:48,531 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 149 places, 168 transitions, 366 flow [2023-01-27 19:04:48,531 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-27 19:04:48,531 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 149 places, 168 transitions, 366 flow [2023-01-27 19:04:48,532 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 149 places, 168 transitions, 366 flow [2023-01-27 19:04:48,532 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 149 places, 168 transitions, 366 flow [2023-01-27 19:04:48,551 INFO L130 PetriNetUnfolder]: 50/346 cut-off events. [2023-01-27 19:04:48,551 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-01-27 19:04:48,552 INFO L83 FinitePrefix]: Finished finitePrefix Result has 374 conditions, 346 events. 50/346 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1041 event pairs, 1 based on Foata normal form. 0/288 useless extension candidates. Maximal degree in co-relation 236. Up to 16 conditions per place. [2023-01-27 19:04:48,559 INFO L119 LiptonReduction]: Number of co-enabled transitions 12432 [2023-01-27 19:04:50,703 INFO L134 LiptonReduction]: Checked pairs total: 36170 [2023-01-27 19:04:50,703 INFO L136 LiptonReduction]: Total number of compositions: 115 [2023-01-27 19:04:50,707 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-27 19:04:50,715 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;@70681e57, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-27 19:04:50,716 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-01-27 19:04:50,717 INFO L130 PetriNetUnfolder]: 1/11 cut-off events. [2023-01-27 19:04:50,717 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-27 19:04:50,717 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:04:50,717 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-01-27 19:04:50,717 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:04:50,718 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:04:50,718 INFO L85 PathProgramCache]: Analyzing trace with hash 30581365, now seen corresponding path program 1 times [2023-01-27 19:04:50,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:04:50,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113290999] [2023-01-27 19:04:50,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:04:50,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:04:50,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:04:50,757 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:04:50,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:04:50,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113290999] [2023-01-27 19:04:50,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113290999] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 19:04:50,757 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 19:04:50,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-27 19:04:50,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964992440] [2023-01-27 19:04:50,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 19:04:50,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 19:04:50,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:04:50,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 19:04:50,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 19:04:50,759 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 283 [2023-01-27 19:04:50,759 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 74 transitions, 178 flow. Second operand has 3 states, 3 states have (on average 132.33333333333334) internal successors, (397), 3 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:04:50,759 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:04:50,759 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 283 [2023-01-27 19:04:50,759 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:04:53,157 INFO L130 PetriNetUnfolder]: 23815/35886 cut-off events. [2023-01-27 19:04:53,158 INFO L131 PetriNetUnfolder]: For 1071/1071 co-relation queries the response was YES. [2023-01-27 19:04:53,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70265 conditions, 35886 events. 23815/35886 cut-off events. For 1071/1071 co-relation queries the response was YES. Maximal size of possible extension queue 996. Compared 248394 event pairs, 15337 based on Foata normal form. 7136/40059 useless extension candidates. Maximal degree in co-relation 5685. Up to 33630 conditions per place. [2023-01-27 19:04:53,248 INFO L137 encePairwiseOnDemand]: 260/283 looper letters, 41 selfloop transitions, 2 changer transitions 10/64 dead transitions. [2023-01-27 19:04:53,248 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 64 transitions, 262 flow [2023-01-27 19:04:53,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 19:04:53,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 19:04:53,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 472 transitions. [2023-01-27 19:04:53,250 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5559481743227326 [2023-01-27 19:04:53,250 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 472 transitions. [2023-01-27 19:04:53,250 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 472 transitions. [2023-01-27 19:04:53,250 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:04:53,250 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 472 transitions. [2023-01-27 19:04:53,251 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 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) [2023-01-27 19:04:53,252 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) [2023-01-27 19:04:53,253 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) [2023-01-27 19:04:53,253 INFO L175 Difference]: Start difference. First operand has 58 places, 74 transitions, 178 flow. Second operand 3 states and 472 transitions. [2023-01-27 19:04:53,253 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 64 transitions, 262 flow [2023-01-27 19:04:53,254 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 64 transitions, 262 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-01-27 19:04:53,255 INFO L231 Difference]: Finished difference. Result has 61 places, 45 transitions, 121 flow [2023-01-27 19:04:53,255 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=283, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=121, PETRI_PLACES=61, PETRI_TRANSITIONS=45} [2023-01-27 19:04:53,256 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 3 predicate places. [2023-01-27 19:04:53,256 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 45 transitions, 121 flow [2023-01-27 19:04:53,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 132.33333333333334) internal successors, (397), 3 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:04:53,256 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:04:53,256 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 19:04:53,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-01-27 19:04:53,256 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:04:53,257 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:04:53,257 INFO L85 PathProgramCache]: Analyzing trace with hash -852539858, now seen corresponding path program 1 times [2023-01-27 19:04:53,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:04:53,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991284072] [2023-01-27 19:04:53,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:04:53,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:04:53,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:04:53,281 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:04:53,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:04:53,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991284072] [2023-01-27 19:04:53,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991284072] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 19:04:53,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008391439] [2023-01-27 19:04:53,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:04:53,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:04:53,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 19:04:53,282 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 19:04:53,297 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-01-27 19:04:53,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:04:53,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 3 conjunts are in the unsatisfiable core [2023-01-27 19:04:53,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 19:04:53,354 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:04:53,354 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 19:04:53,364 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:04:53,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2008391439] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 19:04:53,365 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 19:04:53,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-01-27 19:04:53,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120532003] [2023-01-27 19:04:53,365 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 19:04:53,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-01-27 19:04:53,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:04:53,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-01-27 19:04:53,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-01-27 19:04:53,366 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 283 [2023-01-27 19:04:53,367 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 45 transitions, 121 flow. Second operand has 7 states, 7 states have (on average 133.28571428571428) internal successors, (933), 7 states have internal predecessors, (933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:04:53,367 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:04:53,367 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 283 [2023-01-27 19:04:53,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:04:53,845 INFO L130 PetriNetUnfolder]: 5560/9097 cut-off events. [2023-01-27 19:04:53,845 INFO L131 PetriNetUnfolder]: For 3277/3277 co-relation queries the response was YES. [2023-01-27 19:04:53,855 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20492 conditions, 9097 events. 5560/9097 cut-off events. For 3277/3277 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 60541 event pairs, 70 based on Foata normal form. 819/9914 useless extension candidates. Maximal degree in co-relation 18091. Up to 5346 conditions per place. [2023-01-27 19:04:53,878 INFO L137 encePairwiseOnDemand]: 280/283 looper letters, 79 selfloop transitions, 4 changer transitions 0/94 dead transitions. [2023-01-27 19:04:53,878 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 94 transitions, 385 flow [2023-01-27 19:04:53,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-27 19:04:53,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-27 19:04:53,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 872 transitions. [2023-01-27 19:04:53,880 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5135453474676089 [2023-01-27 19:04:53,880 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 872 transitions. [2023-01-27 19:04:53,880 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 872 transitions. [2023-01-27 19:04:53,881 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:04:53,881 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 872 transitions. [2023-01-27 19:04:53,882 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 145.33333333333334) internal successors, (872), 6 states have internal predecessors, (872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:04:53,884 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) [2023-01-27 19:04:53,885 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) [2023-01-27 19:04:53,886 INFO L175 Difference]: Start difference. First operand has 61 places, 45 transitions, 121 flow. Second operand 6 states and 872 transitions. [2023-01-27 19:04:53,886 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 94 transitions, 385 flow [2023-01-27 19:04:53,891 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 94 transitions, 377 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-01-27 19:04:53,892 INFO L231 Difference]: Finished difference. Result has 55 places, 43 transitions, 117 flow [2023-01-27 19:04:53,892 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=283, PETRI_DIFFERENCE_MINUEND_FLOW=105, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=117, PETRI_PLACES=55, PETRI_TRANSITIONS=43} [2023-01-27 19:04:53,893 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, -3 predicate places. [2023-01-27 19:04:53,893 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 43 transitions, 117 flow [2023-01-27 19:04:53,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 133.28571428571428) internal successors, (933), 7 states have internal predecessors, (933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:04:53,894 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:04:53,894 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-01-27 19:04:53,899 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-01-27 19:04:54,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-01-27 19:04:54,099 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:04:54,099 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:04:54,100 INFO L85 PathProgramCache]: Analyzing trace with hash -2088555563, now seen corresponding path program 1 times [2023-01-27 19:04:54,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:04:54,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268545111] [2023-01-27 19:04:54,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:04:54,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:04:54,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 19:04:54,109 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-27 19:04:54,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 19:04:54,131 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-27 19:04:54,131 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-27 19:04:54,131 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-01-27 19:04:54,131 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-01-27 19:04:54,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-01-27 19:04:54,132 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-01-27 19:04:54,132 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-27 19:04:54,132 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-01-27 19:04:54,145 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-01-27 19:04:54,147 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 174 places, 198 transitions, 440 flow [2023-01-27 19:04:54,211 INFO L130 PetriNetUnfolder]: 81/528 cut-off events. [2023-01-27 19:04:54,212 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-01-27 19:04:54,213 INFO L83 FinitePrefix]: Finished finitePrefix Result has 583 conditions, 528 events. 81/528 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1873 event pairs, 6 based on Foata normal form. 0/442 useless extension candidates. Maximal degree in co-relation 366. Up to 32 conditions per place. [2023-01-27 19:04:54,213 INFO L82 GeneralOperation]: Start removeDead. Operand has 174 places, 198 transitions, 440 flow [2023-01-27 19:04:54,215 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 174 places, 198 transitions, 440 flow [2023-01-27 19:04:54,215 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-27 19:04:54,215 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 174 places, 198 transitions, 440 flow [2023-01-27 19:04:54,216 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 174 places, 198 transitions, 440 flow [2023-01-27 19:04:54,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 174 places, 198 transitions, 440 flow [2023-01-27 19:04:54,257 INFO L130 PetriNetUnfolder]: 81/528 cut-off events. [2023-01-27 19:04:54,257 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-01-27 19:04:54,259 INFO L83 FinitePrefix]: Finished finitePrefix Result has 583 conditions, 528 events. 81/528 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1873 event pairs, 6 based on Foata normal form. 0/442 useless extension candidates. Maximal degree in co-relation 366. Up to 32 conditions per place. [2023-01-27 19:04:54,271 INFO L119 LiptonReduction]: Number of co-enabled transitions 20048 [2023-01-27 19:04:56,466 INFO L134 LiptonReduction]: Checked pairs total: 56129 [2023-01-27 19:04:56,466 INFO L136 LiptonReduction]: Total number of compositions: 127 [2023-01-27 19:04:56,467 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-27 19:04:56,468 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@70681e57, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-27 19:04:56,468 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-01-27 19:04:56,469 INFO L130 PetriNetUnfolder]: 1/11 cut-off events. [2023-01-27 19:04:56,469 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-27 19:04:56,469 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:04:56,470 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-01-27 19:04:56,470 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:04:56,470 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:04:56,470 INFO L85 PathProgramCache]: Analyzing trace with hash 41511427, now seen corresponding path program 1 times [2023-01-27 19:04:56,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:04:56,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004234240] [2023-01-27 19:04:56,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:04:56,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:04:56,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:04:56,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:04:56,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:04:56,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004234240] [2023-01-27 19:04:56,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004234240] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 19:04:56,501 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 19:04:56,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-27 19:04:56,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199431417] [2023-01-27 19:04:56,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 19:04:56,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 19:04:56,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:04:56,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 19:04:56,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 19:04:56,502 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 325 [2023-01-27 19:04:56,503 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 95 transitions, 234 flow. Second operand has 3 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) [2023-01-27 19:04:56,503 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:04:56,503 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 325 [2023-01-27 19:04:56,503 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:05:16,555 INFO L130 PetriNetUnfolder]: 230525/321293 cut-off events. [2023-01-27 19:05:16,555 INFO L131 PetriNetUnfolder]: For 12048/12048 co-relation queries the response was YES. [2023-01-27 19:05:17,015 INFO L83 FinitePrefix]: Finished finitePrefix Result has 629779 conditions, 321293 events. 230525/321293 cut-off events. For 12048/12048 co-relation queries the response was YES. Maximal size of possible extension queue 7349. Compared 2524457 event pairs, 187184 based on Foata normal form. 60142/356184 useless extension candidates. Maximal degree in co-relation 60884. Up to 301798 conditions per place. [2023-01-27 19:05:17,856 INFO L137 encePairwiseOnDemand]: 295/325 looper letters, 46 selfloop transitions, 2 changer transitions 12/77 dead transitions. [2023-01-27 19:05:17,857 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 77 transitions, 316 flow [2023-01-27 19:05:17,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 19:05:17,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 19:05:17,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 552 transitions. [2023-01-27 19:05:17,858 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5661538461538461 [2023-01-27 19:05:17,859 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 552 transitions. [2023-01-27 19:05:17,859 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 552 transitions. [2023-01-27 19:05:17,859 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:05:17,859 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 552 transitions. [2023-01-27 19:05:17,860 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 184.0) internal successors, (552), 3 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:05:17,861 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 325.0) internal successors, (1300), 4 states have internal predecessors, (1300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:05:17,861 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 325.0) internal successors, (1300), 4 states have internal predecessors, (1300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:05:17,861 INFO L175 Difference]: Start difference. First operand has 73 places, 95 transitions, 234 flow. Second operand 3 states and 552 transitions. [2023-01-27 19:05:17,863 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 77 transitions, 316 flow [2023-01-27 19:05:17,867 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 77 transitions, 316 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-01-27 19:05:17,868 INFO L231 Difference]: Finished difference. Result has 76 places, 57 transitions, 156 flow [2023-01-27 19:05:17,868 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=325, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=156, PETRI_PLACES=76, PETRI_TRANSITIONS=57} [2023-01-27 19:05:17,869 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, 3 predicate places. [2023-01-27 19:05:17,870 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 57 transitions, 156 flow [2023-01-27 19:05:17,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 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) [2023-01-27 19:05:17,870 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:05:17,870 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 19:05:17,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-01-27 19:05:17,870 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:05:17,870 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:05:17,870 INFO L85 PathProgramCache]: Analyzing trace with hash -431431528, now seen corresponding path program 1 times [2023-01-27 19:05:17,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:05:17,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012295773] [2023-01-27 19:05:17,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:05:17,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:05:17,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:05:17,899 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:05:17,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:05:17,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012295773] [2023-01-27 19:05:17,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012295773] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 19:05:17,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161096104] [2023-01-27 19:05:17,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:05:17,900 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:05:17,900 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 19:05:17,901 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) [2023-01-27 19:05:17,906 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-01-27 19:05:17,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:05:17,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 3 conjunts are in the unsatisfiable core [2023-01-27 19:05:17,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 19:05:17,970 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:05:17,970 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 19:05:17,985 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:05:17,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [161096104] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 19:05:17,985 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 19:05:17,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2023-01-27 19:05:17,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768953788] [2023-01-27 19:05:17,986 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 19:05:17,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-01-27 19:05:17,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:05:17,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-01-27 19:05:17,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-01-27 19:05:17,988 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 325 [2023-01-27 19:05:17,989 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 57 transitions, 156 flow. Second operand has 6 states, 6 states have (on average 155.0) internal successors, (930), 6 states have internal predecessors, (930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:05:17,989 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:05:17,989 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 325 [2023-01-27 19:05:17,989 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:05:25,407 INFO L130 PetriNetUnfolder]: 96934/133280 cut-off events. [2023-01-27 19:05:25,407 INFO L131 PetriNetUnfolder]: For 18346/18346 co-relation queries the response was YES. [2023-01-27 19:05:25,599 INFO L83 FinitePrefix]: Finished finitePrefix Result has 276371 conditions, 133280 events. 96934/133280 cut-off events. For 18346/18346 co-relation queries the response was YES. Maximal size of possible extension queue 3558. Compared 956040 event pairs, 11714 based on Foata normal form. 584/133838 useless extension candidates. Maximal degree in co-relation 99020. Up to 83201 conditions per place. [2023-01-27 19:05:26,008 INFO L137 encePairwiseOnDemand]: 321/325 looper letters, 111 selfloop transitions, 6 changer transitions 0/134 dead transitions. [2023-01-27 19:05:26,008 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 134 transitions, 548 flow [2023-01-27 19:05:26,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-27 19:05:26,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-27 19:05:26,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1038 transitions. [2023-01-27 19:05:26,014 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5323076923076923 [2023-01-27 19:05:26,014 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1038 transitions. [2023-01-27 19:05:26,014 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1038 transitions. [2023-01-27 19:05:26,015 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:05:26,015 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1038 transitions. [2023-01-27 19:05:26,017 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 173.0) internal successors, (1038), 6 states have internal predecessors, (1038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:05:26,019 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 325.0) internal successors, (2275), 7 states have internal predecessors, (2275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:05:26,019 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 325.0) internal successors, (2275), 7 states have internal predecessors, (2275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:05:26,019 INFO L175 Difference]: Start difference. First operand has 76 places, 57 transitions, 156 flow. Second operand 6 states and 1038 transitions. [2023-01-27 19:05:26,019 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 134 transitions, 548 flow [2023-01-27 19:05:26,035 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 134 transitions, 534 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-01-27 19:05:26,037 INFO L231 Difference]: Finished difference. Result has 76 places, 60 transitions, 182 flow [2023-01-27 19:05:26,037 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=325, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=182, PETRI_PLACES=76, PETRI_TRANSITIONS=60} [2023-01-27 19:05:26,038 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, 3 predicate places. [2023-01-27 19:05:26,039 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 60 transitions, 182 flow [2023-01-27 19:05:26,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 155.0) internal successors, (930), 6 states have internal predecessors, (930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:05:26,039 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:05:26,039 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2023-01-27 19:05:26,051 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-01-27 19:05:26,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:05:26,244 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:05:26,245 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:05:26,245 INFO L85 PathProgramCache]: Analyzing trace with hash 273609228, now seen corresponding path program 1 times [2023-01-27 19:05:26,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:05:26,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937870255] [2023-01-27 19:05:26,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:05:26,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:05:26,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 19:05:26,261 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-27 19:05:26,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 19:05:26,282 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-27 19:05:26,282 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-27 19:05:26,282 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-01-27 19:05:26,282 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-01-27 19:05:26,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-01-27 19:05:26,282 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-01-27 19:05:26,283 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-27 19:05:26,283 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-01-27 19:05:26,305 INFO L144 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2023-01-27 19:05:26,307 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 199 places, 228 transitions, 516 flow [2023-01-27 19:05:26,367 INFO L130 PetriNetUnfolder]: 140/842 cut-off events. [2023-01-27 19:05:26,367 INFO L131 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2023-01-27 19:05:26,372 INFO L83 FinitePrefix]: Finished finitePrefix Result has 953 conditions, 842 events. 140/842 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 3587 event pairs, 23 based on Foata normal form. 0/712 useless extension candidates. Maximal degree in co-relation 573. Up to 80 conditions per place. [2023-01-27 19:05:26,372 INFO L82 GeneralOperation]: Start removeDead. Operand has 199 places, 228 transitions, 516 flow [2023-01-27 19:05:26,376 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 199 places, 228 transitions, 516 flow [2023-01-27 19:05:26,376 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-27 19:05:26,376 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 199 places, 228 transitions, 516 flow [2023-01-27 19:05:26,376 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 199 places, 228 transitions, 516 flow [2023-01-27 19:05:26,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 199 places, 228 transitions, 516 flow [2023-01-27 19:05:26,636 INFO L130 PetriNetUnfolder]: 140/842 cut-off events. [2023-01-27 19:05:26,636 INFO L131 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2023-01-27 19:05:26,641 INFO L83 FinitePrefix]: Finished finitePrefix Result has 953 conditions, 842 events. 140/842 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 3587 event pairs, 23 based on Foata normal form. 0/712 useless extension candidates. Maximal degree in co-relation 573. Up to 80 conditions per place. [2023-01-27 19:05:26,654 INFO L119 LiptonReduction]: Number of co-enabled transitions 29400 [2023-01-27 19:05:28,858 INFO L134 LiptonReduction]: Checked pairs total: 84497 [2023-01-27 19:05:28,858 INFO L136 LiptonReduction]: Total number of compositions: 145 [2023-01-27 19:05:28,859 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-27 19:05:28,859 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;@70681e57, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-27 19:05:28,859 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-01-27 19:05:28,860 INFO L130 PetriNetUnfolder]: 1/10 cut-off events. [2023-01-27 19:05:28,860 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-27 19:05:28,860 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:05:28,861 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-01-27 19:05:28,861 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:05:28,861 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:05:28,861 INFO L85 PathProgramCache]: Analyzing trace with hash 53914925, now seen corresponding path program 1 times [2023-01-27 19:05:28,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:05:28,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209119917] [2023-01-27 19:05:28,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:05:28,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:05:28,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:05:28,875 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:05:28,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:05:28,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209119917] [2023-01-27 19:05:28,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209119917] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 19:05:28,875 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 19:05:28,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-27 19:05:28,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445368788] [2023-01-27 19:05:28,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 19:05:28,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 19:05:28,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:05:28,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 19:05:28,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 19:05:28,877 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 175 out of 373 [2023-01-27 19:05:28,877 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 112 transitions, 284 flow. Second operand has 3 states, 3 states have (on average 176.33333333333334) internal successors, (529), 3 states have internal predecessors, (529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:05:28,877 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:05:28,877 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 175 of 373 [2023-01-27 19:05:28,877 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand