/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_28-funptr_racefree.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-b8dbc81 [2023-01-27 19:14:23,310 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-01-27 19:14:23,311 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-01-27 19:14:23,343 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-01-27 19:14:23,343 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-01-27 19:14:23,344 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-01-27 19:14:23,345 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-01-27 19:14:23,346 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-01-27 19:14:23,347 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-01-27 19:14:23,348 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-01-27 19:14:23,349 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-01-27 19:14:23,351 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-01-27 19:14:23,351 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-01-27 19:14:23,356 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-01-27 19:14:23,358 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-01-27 19:14:23,359 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-01-27 19:14:23,359 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-01-27 19:14:23,360 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-01-27 19:14:23,361 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-01-27 19:14:23,362 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-01-27 19:14:23,363 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-01-27 19:14:23,364 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-01-27 19:14:23,364 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-01-27 19:14:23,366 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-01-27 19:14:23,375 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-01-27 19:14:23,382 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-01-27 19:14:23,383 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-01-27 19:14:23,383 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-01-27 19:14:23,385 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 19:14:23,417 INFO L113 SettingsManager]: Loading preferences was successful [2023-01-27 19:14:23,417 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-01-27 19:14:23,418 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-01-27 19:14:23,418 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-01-27 19:14:23,419 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-01-27 19:14:23,419 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-01-27 19:14:23,419 INFO L138 SettingsManager]: * Use SBE=true [2023-01-27 19:14:23,419 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-01-27 19:14:23,420 INFO L138 SettingsManager]: * sizeof long=4 [2023-01-27 19:14:23,420 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-01-27 19:14:23,420 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-01-27 19:14:23,421 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-01-27 19:14:23,421 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-01-27 19:14:23,421 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-01-27 19:14:23,421 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-01-27 19:14:23,421 INFO L138 SettingsManager]: * sizeof long double=12 [2023-01-27 19:14:23,421 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-01-27 19:14:23,421 INFO L138 SettingsManager]: * Use constant arrays=true [2023-01-27 19:14:23,421 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-01-27 19:14:23,421 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-01-27 19:14:23,422 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-01-27 19:14:23,422 INFO L138 SettingsManager]: * To the following directory=./dump/ [2023-01-27 19:14:23,422 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-01-27 19:14:23,422 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-27 19:14:23,422 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-01-27 19:14:23,422 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-01-27 19:14:23,422 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-01-27 19:14:23,422 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-01-27 19:14:23,423 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-01-27 19:14:23,423 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-01-27 19:14:23,423 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-01-27 19:14:23,423 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-01-27 19:14:23,602 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-01-27 19:14:23,624 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-01-27 19:14:23,626 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-01-27 19:14:23,627 INFO L271 PluginConnector]: Initializing CDTParser... [2023-01-27 19:14:23,627 INFO L275 PluginConnector]: CDTParser initialized [2023-01-27 19:14:23,628 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_28-funptr_racefree.i [2023-01-27 19:14:24,723 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-01-27 19:14:24,946 INFO L351 CDTParser]: Found 1 translation units. [2023-01-27 19:14:24,947 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_28-funptr_racefree.i [2023-01-27 19:14:24,962 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9f724d650/9f21a3b71cc7426abc411c24cf05c74e/FLAG7fc686a4c [2023-01-27 19:14:24,974 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9f724d650/9f21a3b71cc7426abc411c24cf05c74e [2023-01-27 19:14:24,976 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-01-27 19:14:24,977 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2023-01-27 19:14:24,978 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-01-27 19:14:24,978 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-01-27 19:14:24,981 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-01-27 19:14:24,981 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 07:14:24" (1/1) ... [2023-01-27 19:14:24,982 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1bd704df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:14:24, skipping insertion in model container [2023-01-27 19:14:24,982 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 07:14:24" (1/1) ... [2023-01-27 19:14:24,988 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-01-27 19:14:25,018 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-01-27 19:14:25,366 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_28-funptr_racefree.i[41323,41336] [2023-01-27 19:14:25,393 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-27 19:14:25,410 INFO L203 MainTranslator]: Completed pre-run [2023-01-27 19:14:25,450 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_28-funptr_racefree.i[41323,41336] [2023-01-27 19:14:25,464 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-27 19:14:25,520 WARN L667 CHandler]: The function g is called, but not defined or handled by StandardFunctionHandler. [2023-01-27 19:14:25,527 INFO L208 MainTranslator]: Completed translation [2023-01-27 19:14:25,528 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:14:25 WrapperNode [2023-01-27 19:14:25,528 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-01-27 19:14:25,529 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-01-27 19:14:25,529 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-01-27 19:14:25,529 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-01-27 19:14:25,535 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:14:25" (1/1) ... [2023-01-27 19:14:25,557 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:14:25" (1/1) ... [2023-01-27 19:14:25,577 INFO L138 Inliner]: procedures = 273, calls = 42, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 122 [2023-01-27 19:14:25,578 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-01-27 19:14:25,578 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-01-27 19:14:25,578 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-01-27 19:14:25,578 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-01-27 19:14:25,586 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:14:25" (1/1) ... [2023-01-27 19:14:25,586 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:14:25" (1/1) ... [2023-01-27 19:14:25,597 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:14:25" (1/1) ... [2023-01-27 19:14:25,597 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:14:25" (1/1) ... [2023-01-27 19:14:25,606 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:14:25" (1/1) ... [2023-01-27 19:14:25,621 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:14:25" (1/1) ... [2023-01-27 19:14:25,623 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:14:25" (1/1) ... [2023-01-27 19:14:25,624 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:14:25" (1/1) ... [2023-01-27 19:14:25,626 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-01-27 19:14:25,627 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-01-27 19:14:25,627 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-01-27 19:14:25,627 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-01-27 19:14:25,627 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:14:25" (1/1) ... [2023-01-27 19:14:25,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-27 19:14:25,648 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 19:14:25,670 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 19:14:25,676 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 19:14:25,700 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-01-27 19:14:25,701 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-01-27 19:14:25,701 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-01-27 19:14:25,701 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-01-27 19:14:25,702 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-01-27 19:14:25,702 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-01-27 19:14:25,702 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-01-27 19:14:25,702 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-01-27 19:14:25,704 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-01-27 19:14:25,705 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-01-27 19:14:25,705 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-01-27 19:14:25,706 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 19:14:25,825 INFO L236 CfgBuilder]: Building ICFG [2023-01-27 19:14:25,827 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-01-27 19:14:26,049 INFO L277 CfgBuilder]: Performing block encoding [2023-01-27 19:14:26,055 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-01-27 19:14:26,056 INFO L302 CfgBuilder]: Removed 10 assume(true) statements. [2023-01-27 19:14:26,057 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 07:14:26 BoogieIcfgContainer [2023-01-27 19:14:26,057 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-01-27 19:14:26,059 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-01-27 19:14:26,059 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-01-27 19:14:26,062 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-01-27 19:14:26,062 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.01 07:14:24" (1/3) ... [2023-01-27 19:14:26,063 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6bc1969b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 07:14:26, skipping insertion in model container [2023-01-27 19:14:26,063 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:14:25" (2/3) ... [2023-01-27 19:14:26,063 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6bc1969b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 07:14:26, skipping insertion in model container [2023-01-27 19:14:26,063 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 07:14:26" (3/3) ... [2023-01-27 19:14:26,064 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_28-funptr_racefree.i [2023-01-27 19:14:26,077 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-01-27 19:14:26,078 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-01-27 19:14:26,078 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-01-27 19:14:26,154 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-01-27 19:14:26,187 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 110 places, 119 transitions, 246 flow [2023-01-27 19:14:26,279 INFO L130 PetriNetUnfolder]: 17/156 cut-off events. [2023-01-27 19:14:26,279 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-01-27 19:14:26,284 INFO L83 FinitePrefix]: Finished finitePrefix Result has 162 conditions, 156 events. 17/156 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 352 event pairs, 0 based on Foata normal form. 0/134 useless extension candidates. Maximal degree in co-relation 78. Up to 4 conditions per place. [2023-01-27 19:14:26,284 INFO L82 GeneralOperation]: Start removeDead. Operand has 110 places, 119 transitions, 246 flow [2023-01-27 19:14:26,290 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 106 places, 114 transitions, 233 flow [2023-01-27 19:14:26,293 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-27 19:14:26,314 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 106 places, 114 transitions, 233 flow [2023-01-27 19:14:26,317 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 106 places, 114 transitions, 233 flow [2023-01-27 19:14:26,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 106 places, 114 transitions, 233 flow [2023-01-27 19:14:26,358 INFO L130 PetriNetUnfolder]: 16/151 cut-off events. [2023-01-27 19:14:26,358 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-27 19:14:26,365 INFO L83 FinitePrefix]: Finished finitePrefix Result has 156 conditions, 151 events. 16/151 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 339 event pairs, 0 based on Foata normal form. 0/129 useless extension candidates. Maximal degree in co-relation 78. Up to 4 conditions per place. [2023-01-27 19:14:26,368 INFO L119 LiptonReduction]: Number of co-enabled transitions 3096 [2023-01-27 19:14:29,386 INFO L134 LiptonReduction]: Checked pairs total: 6627 [2023-01-27 19:14:29,387 INFO L136 LiptonReduction]: Total number of compositions: 91 [2023-01-27 19:14:29,399 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-27 19:14:29,405 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;@223f3925, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-27 19:14:29,405 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-01-27 19:14:29,410 INFO L130 PetriNetUnfolder]: 0/12 cut-off events. [2023-01-27 19:14:29,410 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-27 19:14:29,410 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:14:29,411 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-01-27 19:14:29,411 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:14:29,415 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:14:29,416 INFO L85 PathProgramCache]: Analyzing trace with hash 432317202, now seen corresponding path program 1 times [2023-01-27 19:14:29,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:14:29,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732313054] [2023-01-27 19:14:29,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:14:29,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:14:29,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 19:14:29,557 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-27 19:14:29,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 19:14:29,600 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-27 19:14:29,601 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-27 19:14:29,602 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-01-27 19:14:29,603 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-01-27 19:14:29,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-01-27 19:14:29,604 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-01-27 19:14:29,607 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-27 19:14:29,607 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-01-27 19:14:29,627 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-01-27 19:14:29,631 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 143 places, 157 transitions, 332 flow [2023-01-27 19:14:29,666 INFO L130 PetriNetUnfolder]: 31/255 cut-off events. [2023-01-27 19:14:29,666 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-01-27 19:14:29,674 INFO L83 FinitePrefix]: Finished finitePrefix Result has 269 conditions, 255 events. 31/255 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 755 event pairs, 0 based on Foata normal form. 0/217 useless extension candidates. Maximal degree in co-relation 158. Up to 8 conditions per place. [2023-01-27 19:14:29,674 INFO L82 GeneralOperation]: Start removeDead. Operand has 143 places, 157 transitions, 332 flow [2023-01-27 19:14:29,677 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 143 places, 157 transitions, 332 flow [2023-01-27 19:14:29,677 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-27 19:14:29,677 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 143 places, 157 transitions, 332 flow [2023-01-27 19:14:29,677 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 143 places, 157 transitions, 332 flow [2023-01-27 19:14:29,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 143 places, 157 transitions, 332 flow [2023-01-27 19:14:29,725 INFO L130 PetriNetUnfolder]: 31/255 cut-off events. [2023-01-27 19:14:29,726 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-01-27 19:14:29,729 INFO L83 FinitePrefix]: Finished finitePrefix Result has 269 conditions, 255 events. 31/255 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 755 event pairs, 0 based on Foata normal form. 0/217 useless extension candidates. Maximal degree in co-relation 158. Up to 8 conditions per place. [2023-01-27 19:14:29,738 INFO L119 LiptonReduction]: Number of co-enabled transitions 9576 [2023-01-27 19:14:32,413 INFO L134 LiptonReduction]: Checked pairs total: 23792 [2023-01-27 19:14:32,414 INFO L136 LiptonReduction]: Total number of compositions: 111 [2023-01-27 19:14:32,416 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-27 19:14:32,417 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;@223f3925, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-27 19:14:32,417 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-01-27 19:14:32,420 INFO L130 PetriNetUnfolder]: 1/21 cut-off events. [2023-01-27 19:14:32,420 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-01-27 19:14:32,420 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:14:32,421 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-01-27 19:14:32,421 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:14:32,421 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:14:32,421 INFO L85 PathProgramCache]: Analyzing trace with hash 1382064333, now seen corresponding path program 1 times [2023-01-27 19:14:32,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:14:32,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977790953] [2023-01-27 19:14:32,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:14:32,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:14:32,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:14:32,521 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 19:14:32,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:14:32,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977790953] [2023-01-27 19:14:32,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977790953] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 19:14:32,522 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 19:14:32,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-27 19:14:32,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344945350] [2023-01-27 19:14:32,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 19:14:32,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 19:14:32,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:14:32,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 19:14:32,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 19:14:32,553 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 268 [2023-01-27 19:14:32,555 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 64 transitions, 146 flow. Second operand has 3 states, 3 states have (on average 130.0) internal successors, (390), 3 states have internal predecessors, (390), 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 19:14:32,555 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:14:32,555 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 268 [2023-01-27 19:14:32,556 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:14:33,116 INFO L130 PetriNetUnfolder]: 3209/5651 cut-off events. [2023-01-27 19:14:33,117 INFO L131 PetriNetUnfolder]: For 55/55 co-relation queries the response was YES. [2023-01-27 19:14:33,136 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10885 conditions, 5651 events. 3209/5651 cut-off events. For 55/55 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 35792 event pairs, 1480 based on Foata normal form. 634/5792 useless extension candidates. Maximal degree in co-relation 857. Up to 5130 conditions per place. [2023-01-27 19:14:33,155 INFO L137 encePairwiseOnDemand]: 251/268 looper letters, 42 selfloop transitions, 2 changer transitions 9/63 dead transitions. [2023-01-27 19:14:33,160 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 63 transitions, 248 flow [2023-01-27 19:14:33,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 19:14:33,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 19:14:33,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 457 transitions. [2023-01-27 19:14:33,177 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.568407960199005 [2023-01-27 19:14:33,178 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 457 transitions. [2023-01-27 19:14:33,178 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 457 transitions. [2023-01-27 19:14:33,181 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:14:33,183 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 457 transitions. [2023-01-27 19:14:33,190 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 152.33333333333334) internal successors, (457), 3 states have internal predecessors, (457), 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 19:14:33,195 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 268.0) internal successors, (1072), 4 states have internal predecessors, (1072), 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 19:14:33,196 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 268.0) internal successors, (1072), 4 states have internal predecessors, (1072), 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 19:14:33,198 INFO L175 Difference]: Start difference. First operand has 53 places, 64 transitions, 146 flow. Second operand 3 states and 457 transitions. [2023-01-27 19:14:33,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 63 transitions, 248 flow [2023-01-27 19:14:33,201 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 63 transitions, 248 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-01-27 19:14:33,202 INFO L231 Difference]: Finished difference. Result has 56 places, 42 transitions, 106 flow [2023-01-27 19:14:33,204 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=106, PETRI_PLACES=56, PETRI_TRANSITIONS=42} [2023-01-27 19:14:33,207 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 3 predicate places. [2023-01-27 19:14:33,207 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 42 transitions, 106 flow [2023-01-27 19:14:33,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 130.0) internal successors, (390), 3 states have internal predecessors, (390), 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 19:14:33,208 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:14:33,208 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-01-27 19:14:33,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-01-27 19:14:33,208 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:14:33,209 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:14:33,209 INFO L85 PathProgramCache]: Analyzing trace with hash -2038109542, now seen corresponding path program 1 times [2023-01-27 19:14:33,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:14:33,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635826793] [2023-01-27 19:14:33,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:14:33,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:14:33,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 19:14:33,229 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-27 19:14:33,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 19:14:33,259 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-27 19:14:33,259 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-27 19:14:33,259 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-01-27 19:14:33,260 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-01-27 19:14:33,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-01-27 19:14:33,260 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-01-27 19:14:33,261 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-27 19:14:33,261 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-01-27 19:14:33,288 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-01-27 19:14:33,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 176 places, 195 transitions, 420 flow [2023-01-27 19:14:33,337 INFO L130 PetriNetUnfolder]: 50/385 cut-off events. [2023-01-27 19:14:33,337 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-01-27 19:14:33,340 INFO L83 FinitePrefix]: Finished finitePrefix Result has 413 conditions, 385 events. 50/385 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1323 event pairs, 1 based on Foata normal form. 0/327 useless extension candidates. Maximal degree in co-relation 263. Up to 16 conditions per place. [2023-01-27 19:14:33,340 INFO L82 GeneralOperation]: Start removeDead. Operand has 176 places, 195 transitions, 420 flow [2023-01-27 19:14:33,343 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 176 places, 195 transitions, 420 flow [2023-01-27 19:14:33,343 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-27 19:14:33,343 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 176 places, 195 transitions, 420 flow [2023-01-27 19:14:33,344 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 176 places, 195 transitions, 420 flow [2023-01-27 19:14:33,344 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 176 places, 195 transitions, 420 flow [2023-01-27 19:14:33,376 INFO L130 PetriNetUnfolder]: 50/385 cut-off events. [2023-01-27 19:14:33,376 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2023-01-27 19:14:33,379 INFO L83 FinitePrefix]: Finished finitePrefix Result has 413 conditions, 385 events. 50/385 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1323 event pairs, 1 based on Foata normal form. 0/327 useless extension candidates. Maximal degree in co-relation 263. Up to 16 conditions per place. [2023-01-27 19:14:33,392 INFO L119 LiptonReduction]: Number of co-enabled transitions 18576 [2023-01-27 19:14:36,358 INFO L134 LiptonReduction]: Checked pairs total: 54923 [2023-01-27 19:14:36,358 INFO L136 LiptonReduction]: Total number of compositions: 132 [2023-01-27 19:14:36,360 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-27 19:14:36,362 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;@223f3925, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-27 19:14:36,362 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-01-27 19:14:36,364 INFO L130 PetriNetUnfolder]: 1/21 cut-off events. [2023-01-27 19:14:36,364 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-01-27 19:14:36,365 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:14:36,365 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-01-27 19:14:36,365 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:14:36,365 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:14:36,365 INFO L85 PathProgramCache]: Analyzing trace with hash 839049322, now seen corresponding path program 1 times [2023-01-27 19:14:36,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:14:36,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860483657] [2023-01-27 19:14:36,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:14:36,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:14:36,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:14:36,442 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 19:14:36,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:14:36,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860483657] [2023-01-27 19:14:36,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860483657] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 19:14:36,443 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 19:14:36,443 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-27 19:14:36,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043136206] [2023-01-27 19:14:36,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 19:14:36,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 19:14:36,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:14:36,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 19:14:36,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 19:14:36,446 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 327 [2023-01-27 19:14:36,447 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 86 transitions, 202 flow. Second operand has 3 states, 3 states have (on average 160.0) internal successors, (480), 3 states have internal predecessors, (480), 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 19:14:36,447 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:14:36,447 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 327 [2023-01-27 19:14:36,447 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:14:41,233 INFO L130 PetriNetUnfolder]: 46217/70848 cut-off events. [2023-01-27 19:14:41,233 INFO L131 PetriNetUnfolder]: For 1319/1319 co-relation queries the response was YES. [2023-01-27 19:14:41,340 INFO L83 FinitePrefix]: Finished finitePrefix Result has 136463 conditions, 70848 events. 46217/70848 cut-off events. For 1319/1319 co-relation queries the response was YES. Maximal size of possible extension queue 1642. Compared 546209 event pairs, 40082 based on Foata normal form. 11264/77044 useless extension candidates. Maximal degree in co-relation 57681. Up to 64618 conditions per place. [2023-01-27 19:14:41,516 INFO L137 encePairwiseOnDemand]: 304/327 looper letters, 51 selfloop transitions, 2 changer transitions 10/79 dead transitions. [2023-01-27 19:14:41,517 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 79 transitions, 312 flow [2023-01-27 19:14:41,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 19:14:41,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 19:14:41,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 563 transitions. [2023-01-27 19:14:41,519 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5739041794087666 [2023-01-27 19:14:41,519 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 563 transitions. [2023-01-27 19:14:41,519 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 563 transitions. [2023-01-27 19:14:41,520 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:14:41,520 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 563 transitions. [2023-01-27 19:14:41,521 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 187.66666666666666) internal successors, (563), 3 states have internal predecessors, (563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:14:41,523 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 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 19:14:41,524 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 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 19:14:41,524 INFO L175 Difference]: Start difference. First operand has 70 places, 86 transitions, 202 flow. Second operand 3 states and 563 transitions. [2023-01-27 19:14:41,524 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 79 transitions, 312 flow [2023-01-27 19:14:41,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 79 transitions, 312 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-01-27 19:14:41,531 INFO L231 Difference]: Finished difference. Result has 73 places, 57 transitions, 145 flow [2023-01-27 19:14:41,531 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=145, PETRI_PLACES=73, PETRI_TRANSITIONS=57} [2023-01-27 19:14:41,534 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 3 predicate places. [2023-01-27 19:14:41,534 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 57 transitions, 145 flow [2023-01-27 19:14:41,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 160.0) internal successors, (480), 3 states have internal predecessors, (480), 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 19:14:41,534 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:14:41,534 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 19:14:41,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-01-27 19:14:41,535 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:14:41,535 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:14:41,535 INFO L85 PathProgramCache]: Analyzing trace with hash -1022657785, now seen corresponding path program 1 times [2023-01-27 19:14:41,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:14:41,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435640333] [2023-01-27 19:14:41,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:14:41,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:14:41,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:14:41,602 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 19:14:41,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:14:41,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435640333] [2023-01-27 19:14:41,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435640333] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 19:14:41,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917981548] [2023-01-27 19:14:41,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:14:41,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:14:41,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 19:14:41,606 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 19:14:41,608 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 19:14:41,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:14:41,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 3 conjunts are in the unsatisfiable core [2023-01-27 19:14:41,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 19:14:41,752 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 19:14:41,752 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 19:14:41,788 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 19:14:41,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [917981548] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 19:14:41,789 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 19:14:41,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-01-27 19:14:41,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259424877] [2023-01-27 19:14:41,789 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 19:14:41,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-01-27 19:14:41,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:14:41,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-01-27 19:14:41,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-01-27 19:14:41,791 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 327 [2023-01-27 19:14:41,792 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 57 transitions, 145 flow. Second operand has 7 states, 7 states have (on average 160.57142857142858) internal successors, (1124), 7 states have internal predecessors, (1124), 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 19:14:41,792 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:14:41,793 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 327 [2023-01-27 19:14:41,793 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:14:42,966 INFO L130 PetriNetUnfolder]: 9268/15130 cut-off events. [2023-01-27 19:14:42,966 INFO L131 PetriNetUnfolder]: For 5520/5520 co-relation queries the response was YES. [2023-01-27 19:14:42,989 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33866 conditions, 15130 events. 9268/15130 cut-off events. For 5520/5520 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 106784 event pairs, 792 based on Foata normal form. 1332/16438 useless extension candidates. Maximal degree in co-relation 2872. Up to 8920 conditions per place. [2023-01-27 19:14:43,042 INFO L137 encePairwiseOnDemand]: 324/327 looper letters, 96 selfloop transitions, 4 changer transitions 0/115 dead transitions. [2023-01-27 19:14:43,042 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 115 transitions, 461 flow [2023-01-27 19:14:43,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-27 19:14:43,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-27 19:14:43,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1051 transitions. [2023-01-27 19:14:43,046 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5356778797145769 [2023-01-27 19:14:43,046 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1051 transitions. [2023-01-27 19:14:43,046 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1051 transitions. [2023-01-27 19:14:43,047 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:14:43,047 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1051 transitions. [2023-01-27 19:14:43,049 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 175.16666666666666) internal successors, (1051), 6 states have internal predecessors, (1051), 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 19:14:43,053 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 327.0) internal successors, (2289), 7 states have internal predecessors, (2289), 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 19:14:43,054 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 327.0) internal successors, (2289), 7 states have internal predecessors, (2289), 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 19:14:43,054 INFO L175 Difference]: Start difference. First operand has 73 places, 57 transitions, 145 flow. Second operand 6 states and 1051 transitions. [2023-01-27 19:14:43,055 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 115 transitions, 461 flow [2023-01-27 19:14:43,070 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 115 transitions, 453 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-01-27 19:14:43,072 INFO L231 Difference]: Finished difference. Result has 64 places, 52 transitions, 135 flow [2023-01-27 19:14:43,072 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=123, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=135, PETRI_PLACES=64, PETRI_TRANSITIONS=52} [2023-01-27 19:14:43,074 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, -6 predicate places. [2023-01-27 19:14:43,074 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 52 transitions, 135 flow [2023-01-27 19:14:43,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 160.57142857142858) internal successors, (1124), 7 states have internal predecessors, (1124), 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 19:14:43,075 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:14:43,075 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-01-27 19:14:43,083 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 19:14:43,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:14:43,280 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:14:43,280 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:14:43,280 INFO L85 PathProgramCache]: Analyzing trace with hash -732255667, now seen corresponding path program 1 times [2023-01-27 19:14:43,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:14:43,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053592385] [2023-01-27 19:14:43,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:14:43,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:14:43,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 19:14:43,303 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-27 19:14:43,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 19:14:43,329 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-27 19:14:43,329 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-27 19:14:43,329 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-01-27 19:14:43,329 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-01-27 19:14:43,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-01-27 19:14:43,330 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-01-27 19:14:43,330 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-27 19:14:43,330 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-01-27 19:14:43,364 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-01-27 19:14:43,372 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 209 places, 233 transitions, 510 flow [2023-01-27 19:14:43,433 INFO L130 PetriNetUnfolder]: 81/579 cut-off events. [2023-01-27 19:14:43,433 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-01-27 19:14:43,440 INFO L83 FinitePrefix]: Finished finitePrefix Result has 634 conditions, 579 events. 81/579 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2270 event pairs, 6 based on Foata normal form. 0/493 useless extension candidates. Maximal degree in co-relation 405. Up to 32 conditions per place. [2023-01-27 19:14:43,440 INFO L82 GeneralOperation]: Start removeDead. Operand has 209 places, 233 transitions, 510 flow [2023-01-27 19:14:43,443 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 209 places, 233 transitions, 510 flow [2023-01-27 19:14:43,443 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-27 19:14:43,443 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 209 places, 233 transitions, 510 flow [2023-01-27 19:14:43,444 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 209 places, 233 transitions, 510 flow [2023-01-27 19:14:43,444 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 209 places, 233 transitions, 510 flow [2023-01-27 19:14:43,499 INFO L130 PetriNetUnfolder]: 81/579 cut-off events. [2023-01-27 19:14:43,499 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2023-01-27 19:14:43,506 INFO L83 FinitePrefix]: Finished finitePrefix Result has 634 conditions, 579 events. 81/579 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2270 event pairs, 6 based on Foata normal form. 0/493 useless extension candidates. Maximal degree in co-relation 405. Up to 32 conditions per place. [2023-01-27 19:14:43,525 INFO L119 LiptonReduction]: Number of co-enabled transitions 30384 [2023-01-27 19:14:46,639 INFO L134 LiptonReduction]: Checked pairs total: 94715 [2023-01-27 19:14:46,640 INFO L136 LiptonReduction]: Total number of compositions: 153 [2023-01-27 19:14:46,641 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-27 19:14:46,642 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;@223f3925, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-27 19:14:46,642 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-01-27 19:14:46,644 INFO L130 PetriNetUnfolder]: 1/21 cut-off events. [2023-01-27 19:14:46,644 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-01-27 19:14:46,644 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:14:46,644 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-01-27 19:14:46,644 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:14:46,645 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:14:46,645 INFO L85 PathProgramCache]: Analyzing trace with hash -1476575135, now seen corresponding path program 1 times [2023-01-27 19:14:46,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:14:46,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167863961] [2023-01-27 19:14:46,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:14:46,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:14:46,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:14:46,695 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 19:14:46,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:14:46,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167863961] [2023-01-27 19:14:46,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167863961] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 19:14:46,696 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 19:14:46,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-27 19:14:46,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92560960] [2023-01-27 19:14:46,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 19:14:46,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 19:14:46,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:14:46,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 19:14:46,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 19:14:46,698 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 188 out of 386 [2023-01-27 19:14:46,698 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 108 transitions, 260 flow. Second operand has 3 states, 3 states have (on average 190.0) internal successors, (570), 3 states have internal predecessors, (570), 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 19:14:46,698 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:14:46,698 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 188 of 386 [2023-01-27 19:14:46,698 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:15:53,539 INFO L130 PetriNetUnfolder]: 708182/992568 cut-off events. [2023-01-27 19:15:53,540 INFO L131 PetriNetUnfolder]: For 26263/26263 co-relation queries the response was YES. [2023-01-27 19:15:56,129 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1924111 conditions, 992568 events. 708182/992568 cut-off events. For 26263/26263 co-relation queries the response was YES. Maximal size of possible extension queue 17192. Compared 8489893 event pairs, 524676 based on Foata normal form. 184338/1118746 useless extension candidates. Maximal degree in co-relation 150818. Up to 916877 conditions per place. [2023-01-27 19:15:59,437 INFO L137 encePairwiseOnDemand]: 357/386 looper letters, 60 selfloop transitions, 2 changer transitions 11/93 dead transitions. [2023-01-27 19:15:59,440 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 93 transitions, 374 flow [2023-01-27 19:15:59,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 19:15:59,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 19:15:59,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 669 transitions. [2023-01-27 19:15:59,452 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5777202072538861 [2023-01-27 19:15:59,455 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 669 transitions. [2023-01-27 19:15:59,455 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 669 transitions. [2023-01-27 19:15:59,456 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:15:59,456 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 669 transitions. [2023-01-27 19:15:59,457 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 223.0) internal successors, (669), 3 states have internal predecessors, (669), 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 19:15:59,460 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 386.0) internal successors, (1544), 4 states have internal predecessors, (1544), 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 19:15:59,460 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 386.0) internal successors, (1544), 4 states have internal predecessors, (1544), 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 19:15:59,461 INFO L175 Difference]: Start difference. First operand has 87 places, 108 transitions, 260 flow. Second operand 3 states and 669 transitions. [2023-01-27 19:15:59,461 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 93 transitions, 374 flow [2023-01-27 19:15:59,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 93 transitions, 374 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-01-27 19:15:59,491 INFO L231 Difference]: Finished difference. Result has 90 places, 72 transitions, 186 flow [2023-01-27 19:15:59,492 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=386, PETRI_DIFFERENCE_MINUEND_FLOW=208, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=186, PETRI_PLACES=90, PETRI_TRANSITIONS=72} [2023-01-27 19:15:59,494 INFO L281 CegarLoopForPetriNet]: 87 programPoint places, 3 predicate places. [2023-01-27 19:15:59,494 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 72 transitions, 186 flow [2023-01-27 19:15:59,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 190.0) internal successors, (570), 3 states have internal predecessors, (570), 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 19:15:59,495 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:15:59,495 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 19:15:59,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-01-27 19:15:59,495 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:15:59,495 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:15:59,495 INFO L85 PathProgramCache]: Analyzing trace with hash -385928188, now seen corresponding path program 1 times [2023-01-27 19:15:59,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:15:59,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114524196] [2023-01-27 19:15:59,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:15:59,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:15:59,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:15:59,607 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 19:15:59,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:15:59,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114524196] [2023-01-27 19:15:59,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114524196] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 19:15:59,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680839517] [2023-01-27 19:15:59,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:15:59,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:15:59,608 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 19:15:59,612 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 19:15:59,649 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 19:15:59,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:15:59,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 3 conjunts are in the unsatisfiable core [2023-01-27 19:15:59,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 19:15:59,749 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 19:15:59,749 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 19:15:59,778 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 19:15:59,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [680839517] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 19:15:59,779 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 19:15:59,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-01-27 19:15:59,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189463291] [2023-01-27 19:15:59,779 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 19:15:59,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-01-27 19:15:59,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:15:59,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-01-27 19:15:59,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-01-27 19:15:59,782 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 188 out of 386 [2023-01-27 19:15:59,783 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 72 transitions, 186 flow. Second operand has 7 states, 7 states have (on average 190.57142857142858) internal successors, (1334), 7 states have internal predecessors, (1334), 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 19:15:59,783 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:15:59,783 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 188 of 386 [2023-01-27 19:15:59,783 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:16:47,112 INFO L130 PetriNetUnfolder]: 381099/520544 cut-off events. [2023-01-27 19:16:47,113 INFO L131 PetriNetUnfolder]: For 30832/30832 co-relation queries the response was YES. [2023-01-27 19:16:48,649 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1051776 conditions, 520544 events. 381099/520544 cut-off events. For 30832/30832 co-relation queries the response was YES. Maximal size of possible extension queue 9896. Compared 4094542 event pairs, 11952 based on Foata normal form. 1440/521979 useless extension candidates. Maximal degree in co-relation 729590. Up to 366361 conditions per place. [2023-01-27 19:16:50,912 INFO L137 encePairwiseOnDemand]: 382/386 looper letters, 149 selfloop transitions, 6 changer transitions 0/175 dead transitions. [2023-01-27 19:16:50,913 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 175 transitions, 706 flow [2023-01-27 19:16:50,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-27 19:16:50,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-27 19:16:50,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1286 transitions. [2023-01-27 19:16:50,916 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5552677029360967 [2023-01-27 19:16:50,916 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1286 transitions. [2023-01-27 19:16:50,916 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1286 transitions. [2023-01-27 19:16:50,916 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:16:50,916 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1286 transitions. [2023-01-27 19:16:50,919 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 214.33333333333334) internal successors, (1286), 6 states have internal predecessors, (1286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:16:50,921 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 386.0) internal successors, (2702), 7 states have internal predecessors, (2702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:16:50,922 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 386.0) internal successors, (2702), 7 states have internal predecessors, (2702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:16:50,922 INFO L175 Difference]: Start difference. First operand has 90 places, 72 transitions, 186 flow. Second operand 6 states and 1286 transitions. [2023-01-27 19:16:50,922 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 175 transitions, 706 flow [2023-01-27 19:16:50,949 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 175 transitions, 692 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-01-27 19:16:50,950 INFO L231 Difference]: Finished difference. Result has 91 places, 75 transitions, 212 flow [2023-01-27 19:16:50,951 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=386, PETRI_DIFFERENCE_MINUEND_FLOW=172, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=212, PETRI_PLACES=91, PETRI_TRANSITIONS=75} [2023-01-27 19:16:50,951 INFO L281 CegarLoopForPetriNet]: 87 programPoint places, 4 predicate places. [2023-01-27 19:16:50,951 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 75 transitions, 212 flow [2023-01-27 19:16:50,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 190.57142857142858) internal successors, (1334), 7 states have internal predecessors, (1334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:16:50,952 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:16:50,952 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2023-01-27 19:16:50,961 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 19:16:51,157 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,SelfDestructingSolverStorable7 [2023-01-27 19:16:51,158 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:16:51,158 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:16:51,158 INFO L85 PathProgramCache]: Analyzing trace with hash -2147103074, now seen corresponding path program 1 times [2023-01-27 19:16:51,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:16:51,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751437563] [2023-01-27 19:16:51,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:16:51,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:16:51,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 19:16:51,175 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-27 19:16:51,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 19:16:51,190 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-27 19:16:51,191 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-27 19:16:51,191 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-01-27 19:16:51,191 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-01-27 19:16:51,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-01-27 19:16:51,191 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-01-27 19:16:51,192 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-27 19:16:51,192 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-01-27 19:16:51,214 INFO L144 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2023-01-27 19:16:51,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 242 places, 271 transitions, 602 flow [2023-01-27 19:16:51,322 INFO L130 PetriNetUnfolder]: 140/905 cut-off events. [2023-01-27 19:16:51,322 INFO L131 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2023-01-27 19:16:51,336 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1016 conditions, 905 events. 140/905 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 4184 event pairs, 23 based on Foata normal form. 0/775 useless extension candidates. Maximal degree in co-relation 624. Up to 80 conditions per place. [2023-01-27 19:16:51,336 INFO L82 GeneralOperation]: Start removeDead. Operand has 242 places, 271 transitions, 602 flow [2023-01-27 19:16:51,341 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 242 places, 271 transitions, 602 flow [2023-01-27 19:16:51,341 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-27 19:16:51,341 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 242 places, 271 transitions, 602 flow [2023-01-27 19:16:51,341 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 242 places, 271 transitions, 602 flow [2023-01-27 19:16:51,341 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 242 places, 271 transitions, 602 flow [2023-01-27 19:16:51,423 INFO L130 PetriNetUnfolder]: 140/905 cut-off events. [2023-01-27 19:16:51,423 INFO L131 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2023-01-27 19:16:51,431 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1016 conditions, 905 events. 140/905 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 4184 event pairs, 23 based on Foata normal form. 0/775 useless extension candidates. Maximal degree in co-relation 624. Up to 80 conditions per place. [2023-01-27 19:16:51,460 INFO L119 LiptonReduction]: Number of co-enabled transitions 45000 [2023-01-27 19:16:54,239 INFO L134 LiptonReduction]: Checked pairs total: 129227 [2023-01-27 19:16:54,239 INFO L136 LiptonReduction]: Total number of compositions: 174 [2023-01-27 19:16:54,240 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-27 19:16:54,241 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;@223f3925, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-27 19:16:54,241 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-01-27 19:16:54,243 INFO L130 PetriNetUnfolder]: 1/22 cut-off events. [2023-01-27 19:16:54,243 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-01-27 19:16:54,243 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:16:54,243 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-01-27 19:16:54,243 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:16:54,243 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:16:54,244 INFO L85 PathProgramCache]: Analyzing trace with hash -1264301137, now seen corresponding path program 1 times [2023-01-27 19:16:54,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:16:54,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800732201] [2023-01-27 19:16:54,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:16:54,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:16:54,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:16:54,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:16:54,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:16:54,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800732201] [2023-01-27 19:16:54,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800732201] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 19:16:54,288 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 19:16:54,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-27 19:16:54,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155315228] [2023-01-27 19:16:54,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 19:16:54,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 19:16:54,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:16:54,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 19:16:54,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 19:16:54,290 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 218 out of 445 [2023-01-27 19:16:54,290 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 130 transitions, 320 flow. Second operand has 3 states, 3 states have (on average 220.0) internal successors, (660), 3 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:16:54,290 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:16:54,290 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 218 of 445 [2023-01-27 19:16:54,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand