/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/pthread-deagle/reorder_c11_good-20.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-?-3902331-m [2022-09-20 23:51:15,097 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-09-20 23:51:15,099 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-09-20 23:51:15,118 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-09-20 23:51:15,118 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-09-20 23:51:15,119 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-09-20 23:51:15,120 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-09-20 23:51:15,121 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-09-20 23:51:15,122 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-09-20 23:51:15,122 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-09-20 23:51:15,123 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-09-20 23:51:15,124 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-09-20 23:51:15,124 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-09-20 23:51:15,124 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-09-20 23:51:15,125 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-09-20 23:51:15,126 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-09-20 23:51:15,126 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-09-20 23:51:15,127 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-09-20 23:51:15,131 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-09-20 23:51:15,136 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-09-20 23:51:15,139 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-09-20 23:51:15,141 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-09-20 23:51:15,142 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-09-20 23:51:15,142 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-09-20 23:51:15,144 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-09-20 23:51:15,149 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-09-20 23:51:15,149 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-09-20 23:51:15,150 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-09-20 23:51:15,157 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-NoLbe.epf [2022-09-20 23:51:15,181 INFO L113 SettingsManager]: Loading preferences was successful [2022-09-20 23:51:15,181 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-09-20 23:51:15,182 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-09-20 23:51:15,182 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-09-20 23:51:15,182 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-09-20 23:51:15,183 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-09-20 23:51:15,183 INFO L138 SettingsManager]: * Use SBE=true [2022-09-20 23:51:15,183 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-09-20 23:51:15,183 INFO L138 SettingsManager]: * sizeof long=4 [2022-09-20 23:51:15,183 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-09-20 23:51:15,183 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-09-20 23:51:15,184 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-09-20 23:51:15,184 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-09-20 23:51:15,184 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-09-20 23:51:15,184 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-09-20 23:51:15,184 INFO L138 SettingsManager]: * sizeof long double=12 [2022-09-20 23:51:15,184 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-09-20 23:51:15,184 INFO L138 SettingsManager]: * Use constant arrays=true [2022-09-20 23:51:15,184 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-09-20 23:51:15,184 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-09-20 23:51:15,184 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-09-20 23:51:15,184 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-09-20 23:51:15,185 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-09-20 23:51:15,185 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-09-20 23:51:15,185 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-09-20 23:51:15,185 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-09-20 23:51:15,186 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-09-20 23:51:15,186 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-09-20 23:51:15,186 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-09-20 23:51:15,186 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-09-20 23:51:15,186 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-09-20 23:51:15,186 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-09-20 23:51:15,390 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-09-20 23:51:15,409 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-09-20 23:51:15,411 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-09-20 23:51:15,411 INFO L271 PluginConnector]: Initializing CDTParser... [2022-09-20 23:51:15,412 INFO L275 PluginConnector]: CDTParser initialized [2022-09-20 23:51:15,413 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-deagle/reorder_c11_good-20.i [2022-09-20 23:51:15,464 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/70bf57948/887fe4e45123493695413c3eece753b8/FLAG7777bdd88 [2022-09-20 23:51:15,952 INFO L306 CDTParser]: Found 1 translation units. [2022-09-20 23:51:15,953 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-deagle/reorder_c11_good-20.i [2022-09-20 23:51:15,971 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/70bf57948/887fe4e45123493695413c3eece753b8/FLAG7777bdd88 [2022-09-20 23:51:16,452 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/70bf57948/887fe4e45123493695413c3eece753b8 [2022-09-20 23:51:16,453 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-09-20 23:51:16,454 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-09-20 23:51:16,455 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-09-20 23:51:16,455 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-09-20 23:51:16,466 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-09-20 23:51:16,467 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 11:51:16" (1/1) ... [2022-09-20 23:51:16,468 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@402efed1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 11:51:16, skipping insertion in model container [2022-09-20 23:51:16,468 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 11:51:16" (1/1) ... [2022-09-20 23:51:16,472 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-09-20 23:51:16,492 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-09-20 23:51:16,736 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-deagle/reorder_c11_good-20.i[30195,30208] [2022-09-20 23:51:16,751 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-09-20 23:51:16,757 INFO L203 MainTranslator]: Completed pre-run [2022-09-20 23:51:16,787 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-deagle/reorder_c11_good-20.i[30195,30208] [2022-09-20 23:51:16,790 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-09-20 23:51:16,813 INFO L208 MainTranslator]: Completed translation [2022-09-20 23:51:16,814 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 11:51:16 WrapperNode [2022-09-20 23:51:16,814 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-09-20 23:51:16,815 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-09-20 23:51:16,815 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-09-20 23:51:16,815 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-09-20 23:51:16,819 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 11:51:16" (1/1) ... [2022-09-20 23:51:16,828 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 11:51:16" (1/1) ... [2022-09-20 23:51:16,842 INFO L138 Inliner]: procedures = 163, calls = 21, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 71 [2022-09-20 23:51:16,842 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-09-20 23:51:16,843 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-09-20 23:51:16,843 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-09-20 23:51:16,843 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-09-20 23:51:16,848 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 11:51:16" (1/1) ... [2022-09-20 23:51:16,848 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 11:51:16" (1/1) ... [2022-09-20 23:51:16,850 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 11:51:16" (1/1) ... [2022-09-20 23:51:16,850 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 11:51:16" (1/1) ... [2022-09-20 23:51:16,854 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 11:51:16" (1/1) ... [2022-09-20 23:51:16,857 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 11:51:16" (1/1) ... [2022-09-20 23:51:16,858 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 11:51:16" (1/1) ... [2022-09-20 23:51:16,860 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-09-20 23:51:16,860 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-09-20 23:51:16,860 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-09-20 23:51:16,860 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-09-20 23:51:16,861 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 11:51:16" (1/1) ... [2022-09-20 23:51:16,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-09-20 23:51:16,874 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 23:51:16,885 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-09-20 23:51:16,901 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-09-20 23:51:16,919 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-09-20 23:51:16,919 INFO L130 BoogieDeclarations]: Found specification of procedure setThread [2022-09-20 23:51:16,920 INFO L138 BoogieDeclarations]: Found implementation of procedure setThread [2022-09-20 23:51:16,920 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-09-20 23:51:16,920 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-09-20 23:51:16,920 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-09-20 23:51:16,920 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-09-20 23:51:16,921 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-09-20 23:51:16,921 INFO L130 BoogieDeclarations]: Found specification of procedure checkThread [2022-09-20 23:51:16,921 INFO L138 BoogieDeclarations]: Found implementation of procedure checkThread [2022-09-20 23:51:16,921 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-09-20 23:51:16,921 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-09-20 23:51:16,921 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-09-20 23:51:16,921 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-09-20 23:51:16,923 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-09-20 23:51:17,026 INFO L234 CfgBuilder]: Building ICFG [2022-09-20 23:51:17,027 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-09-20 23:51:17,216 INFO L275 CfgBuilder]: Performing block encoding [2022-09-20 23:51:17,220 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-09-20 23:51:17,221 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2022-09-20 23:51:17,222 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 11:51:17 BoogieIcfgContainer [2022-09-20 23:51:17,222 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-09-20 23:51:17,224 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-09-20 23:51:17,224 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-09-20 23:51:17,228 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-09-20 23:51:17,228 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.09 11:51:16" (1/3) ... [2022-09-20 23:51:17,228 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@743b809d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 11:51:17, skipping insertion in model container [2022-09-20 23:51:17,229 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 11:51:16" (2/3) ... [2022-09-20 23:51:17,229 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@743b809d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 11:51:17, skipping insertion in model container [2022-09-20 23:51:17,229 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 11:51:17" (3/3) ... [2022-09-20 23:51:17,230 INFO L112 eAbstractionObserver]: Analyzing ICFG reorder_c11_good-20.i [2022-09-20 23:51:17,242 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-09-20 23:51:17,242 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-09-20 23:51:17,242 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-09-20 23:51:17,290 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-09-20 23:51:17,324 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 87 places, 91 transitions, 204 flow [2022-09-20 23:51:17,371 INFO L130 PetriNetUnfolder]: 24/202 cut-off events. [2022-09-20 23:51:17,371 INFO L131 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2022-09-20 23:51:17,376 INFO L83 FinitePrefix]: Finished finitePrefix Result has 222 conditions, 202 events. 24/202 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 625 event pairs, 0 based on Foata normal form. 0/170 useless extension candidates. Maximal degree in co-relation 105. Up to 8 conditions per place. [2022-09-20 23:51:17,376 INFO L82 GeneralOperation]: Start removeDead. Operand has 87 places, 91 transitions, 204 flow [2022-09-20 23:51:17,379 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 87 places, 89 transitions, 194 flow [2022-09-20 23:51:17,385 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-09-20 23:51:17,390 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;@10c17634, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-09-20 23:51:17,390 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-09-20 23:51:17,401 INFO L130 PetriNetUnfolder]: 6/70 cut-off events. [2022-09-20 23:51:17,401 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-09-20 23:51:17,401 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 23:51:17,402 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 23:51:17,402 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-09-20 23:51:17,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 23:51:17,406 INFO L85 PathProgramCache]: Analyzing trace with hash 1384871672, now seen corresponding path program 1 times [2022-09-20 23:51:17,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 23:51:17,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281540559] [2022-09-20 23:51:17,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 23:51:17,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 23:51:17,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 23:51:17,572 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 23:51:17,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 23:51:17,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281540559] [2022-09-20 23:51:17,573 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281540559] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-20 23:51:17,574 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-20 23:51:17,574 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-09-20 23:51:17,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491828045] [2022-09-20 23:51:17,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-20 23:51:17,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-09-20 23:51:17,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 23:51:17,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-09-20 23:51:17,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-09-20 23:51:17,624 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 91 [2022-09-20 23:51:17,627 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 89 transitions, 194 flow. Second operand has 2 states, 2 states have (on average 79.5) internal successors, (159), 2 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:51:17,627 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 23:51:17,630 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 91 [2022-09-20 23:51:17,631 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 23:51:17,686 INFO L130 PetriNetUnfolder]: 4/168 cut-off events. [2022-09-20 23:51:17,686 INFO L131 PetriNetUnfolder]: For 15/15 co-relation queries the response was YES. [2022-09-20 23:51:17,686 INFO L83 FinitePrefix]: Finished finitePrefix Result has 192 conditions, 168 events. 4/168 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 520 event pairs, 0 based on Foata normal form. 18/172 useless extension candidates. Maximal degree in co-relation 104. Up to 8 conditions per place. [2022-09-20 23:51:17,687 INFO L137 encePairwiseOnDemand]: 86/91 looper letters, 2 selfloop transitions, 0 changer transitions 26/81 dead transitions. [2022-09-20 23:51:17,688 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 81 transitions, 186 flow [2022-09-20 23:51:17,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-09-20 23:51:17,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-09-20 23:51:17,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 165 transitions. [2022-09-20 23:51:17,696 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.9065934065934066 [2022-09-20 23:51:17,697 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 165 transitions. [2022-09-20 23:51:17,697 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 165 transitions. [2022-09-20 23:51:17,698 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 23:51:17,700 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 165 transitions. [2022-09-20 23:51:17,701 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 82.5) internal successors, (165), 2 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:51:17,709 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 91.0) internal successors, (273), 3 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:51:17,710 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 91.0) internal successors, (273), 3 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:51:17,711 INFO L175 Difference]: Start difference. First operand has 87 places, 89 transitions, 194 flow. Second operand 2 states and 165 transitions. [2022-09-20 23:51:17,712 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 81 transitions, 186 flow [2022-09-20 23:51:17,714 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 81 transitions, 186 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-09-20 23:51:17,720 INFO L231 Difference]: Finished difference. Result has 85 places, 55 transitions, 120 flow [2022-09-20 23:51:17,722 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=91, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=120, PETRI_PLACES=85, PETRI_TRANSITIONS=55} [2022-09-20 23:51:17,725 INFO L287 CegarLoopForPetriNet]: 87 programPoint places, -2 predicate places. [2022-09-20 23:51:17,725 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 55 transitions, 120 flow [2022-09-20 23:51:17,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 79.5) internal successors, (159), 2 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:51:17,726 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 23:51:17,726 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 23:51:17,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-09-20 23:51:17,727 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-09-20 23:51:17,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 23:51:17,728 INFO L85 PathProgramCache]: Analyzing trace with hash 1644059886, now seen corresponding path program 1 times [2022-09-20 23:51:17,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 23:51:17,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629932903] [2022-09-20 23:51:17,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 23:51:17,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 23:51:17,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-09-20 23:51:17,775 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-09-20 23:51:17,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-09-20 23:51:17,812 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-09-20 23:51:17,813 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-09-20 23:51:17,814 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2022-09-20 23:51:17,815 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2022-09-20 23:51:17,816 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2022-09-20 23:51:17,816 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2022-09-20 23:51:17,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-09-20 23:51:17,816 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1] [2022-09-20 23:51:17,818 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-09-20 23:51:17,818 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-09-20 23:51:17,834 INFO L144 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2022-09-20 23:51:17,837 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 105 places, 110 transitions, 268 flow [2022-09-20 23:51:17,944 INFO L130 PetriNetUnfolder]: 107/656 cut-off events. [2022-09-20 23:51:17,945 INFO L131 PetriNetUnfolder]: For 72/72 co-relation queries the response was YES. [2022-09-20 23:51:17,951 INFO L83 FinitePrefix]: Finished finitePrefix Result has 753 conditions, 656 events. 107/656 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 3175 event pairs, 2 based on Foata normal form. 0/556 useless extension candidates. Maximal degree in co-relation 395. Up to 32 conditions per place. [2022-09-20 23:51:17,952 INFO L82 GeneralOperation]: Start removeDead. Operand has 105 places, 110 transitions, 268 flow [2022-09-20 23:51:17,956 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 105 places, 110 transitions, 268 flow [2022-09-20 23:51:17,961 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-09-20 23:51:17,967 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;@10c17634, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-09-20 23:51:17,967 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-09-20 23:51:17,973 INFO L130 PetriNetUnfolder]: 5/66 cut-off events. [2022-09-20 23:51:17,973 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-09-20 23:51:17,973 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 23:51:17,973 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 23:51:17,974 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-09-20 23:51:17,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 23:51:17,977 INFO L85 PathProgramCache]: Analyzing trace with hash 1254997903, now seen corresponding path program 1 times [2022-09-20 23:51:17,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 23:51:17,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660323084] [2022-09-20 23:51:17,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 23:51:17,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 23:51:18,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 23:51:18,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 23:51:18,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 23:51:18,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660323084] [2022-09-20 23:51:18,028 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660323084] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-20 23:51:18,028 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-20 23:51:18,028 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-09-20 23:51:18,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277274474] [2022-09-20 23:51:18,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-20 23:51:18,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-09-20 23:51:18,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 23:51:18,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-09-20 23:51:18,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-09-20 23:51:18,032 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 110 [2022-09-20 23:51:18,032 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 110 transitions, 268 flow. Second operand has 2 states, 2 states have (on average 89.5) internal successors, (179), 2 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:51:18,032 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 23:51:18,032 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 110 [2022-09-20 23:51:18,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 23:51:18,114 INFO L130 PetriNetUnfolder]: 57/588 cut-off events. [2022-09-20 23:51:18,114 INFO L131 PetriNetUnfolder]: For 212/212 co-relation queries the response was YES. [2022-09-20 23:51:18,116 INFO L83 FinitePrefix]: Finished finitePrefix Result has 758 conditions, 588 events. 57/588 cut-off events. For 212/212 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 2956 event pairs, 1 based on Foata normal form. 81/625 useless extension candidates. Maximal degree in co-relation 384. Up to 73 conditions per place. [2022-09-20 23:51:18,116 INFO L137 encePairwiseOnDemand]: 104/110 looper letters, 4 selfloop transitions, 0 changer transitions 32/98 dead transitions. [2022-09-20 23:51:18,116 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 98 transitions, 268 flow [2022-09-20 23:51:18,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-09-20 23:51:18,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-09-20 23:51:18,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 194 transitions. [2022-09-20 23:51:18,121 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8818181818181818 [2022-09-20 23:51:18,121 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 194 transitions. [2022-09-20 23:51:18,122 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 194 transitions. [2022-09-20 23:51:18,123 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 23:51:18,123 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 194 transitions. [2022-09-20 23:51:18,125 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 97.0) internal successors, (194), 2 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:51:18,126 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 110.0) internal successors, (330), 3 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:51:18,126 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 110.0) internal successors, (330), 3 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:51:18,126 INFO L175 Difference]: Start difference. First operand has 105 places, 110 transitions, 268 flow. Second operand 2 states and 194 transitions. [2022-09-20 23:51:18,126 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 98 transitions, 268 flow [2022-09-20 23:51:18,128 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 98 transitions, 268 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-09-20 23:51:18,130 INFO L231 Difference]: Finished difference. Result has 100 places, 66 transitions, 156 flow [2022-09-20 23:51:18,130 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=110, PETRI_DIFFERENCE_MINUEND_FLOW=244, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=156, PETRI_PLACES=100, PETRI_TRANSITIONS=66} [2022-09-20 23:51:18,130 INFO L287 CegarLoopForPetriNet]: 105 programPoint places, -5 predicate places. [2022-09-20 23:51:18,131 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 66 transitions, 156 flow [2022-09-20 23:51:18,131 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 89.5) internal successors, (179), 2 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:51:18,131 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 23:51:18,131 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 23:51:18,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-09-20 23:51:18,132 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-09-20 23:51:18,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 23:51:18,132 INFO L85 PathProgramCache]: Analyzing trace with hash 1114336808, now seen corresponding path program 1 times [2022-09-20 23:51:18,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 23:51:18,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220472533] [2022-09-20 23:51:18,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 23:51:18,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 23:51:18,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-09-20 23:51:18,168 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-09-20 23:51:18,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-09-20 23:51:18,192 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-09-20 23:51:18,192 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-09-20 23:51:18,193 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2022-09-20 23:51:18,193 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2022-09-20 23:51:18,193 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 5 remaining) [2022-09-20 23:51:18,193 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2022-09-20 23:51:18,193 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2022-09-20 23:51:18,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-09-20 23:51:18,193 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1] [2022-09-20 23:51:18,194 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-09-20 23:51:18,194 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-09-20 23:51:18,211 INFO L144 ThreadInstanceAdder]: Constructed 12 joinOtherThreadTransitions. [2022-09-20 23:51:18,213 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 123 places, 129 transitions, 336 flow [2022-09-20 23:51:18,445 INFO L130 PetriNetUnfolder]: 496/2280 cut-off events. [2022-09-20 23:51:18,446 INFO L131 PetriNetUnfolder]: For 419/419 co-relation queries the response was YES. [2022-09-20 23:51:18,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2731 conditions, 2280 events. 496/2280 cut-off events. For 419/419 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 15060 event pairs, 64 based on Foata normal form. 0/1960 useless extension candidates. Maximal degree in co-relation 1399. Up to 192 conditions per place. [2022-09-20 23:51:18,455 INFO L82 GeneralOperation]: Start removeDead. Operand has 123 places, 129 transitions, 336 flow [2022-09-20 23:51:18,465 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 123 places, 129 transitions, 336 flow [2022-09-20 23:51:18,466 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-09-20 23:51:18,468 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@10c17634, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-09-20 23:51:18,468 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-09-20 23:51:18,474 INFO L130 PetriNetUnfolder]: 4/64 cut-off events. [2022-09-20 23:51:18,474 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-09-20 23:51:18,474 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 23:51:18,474 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 23:51:18,474 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-09-20 23:51:18,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 23:51:18,475 INFO L85 PathProgramCache]: Analyzing trace with hash -1599709371, now seen corresponding path program 1 times [2022-09-20 23:51:18,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 23:51:18,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624386268] [2022-09-20 23:51:18,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 23:51:18,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 23:51:18,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 23:51:18,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 23:51:18,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 23:51:18,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624386268] [2022-09-20 23:51:18,538 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624386268] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-20 23:51:18,538 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-20 23:51:18,538 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-09-20 23:51:18,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999128813] [2022-09-20 23:51:18,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-20 23:51:18,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-09-20 23:51:18,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 23:51:18,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-09-20 23:51:18,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-09-20 23:51:18,541 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 129 [2022-09-20 23:51:18,541 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 129 transitions, 336 flow. Second operand has 3 states, 3 states have (on average 75.66666666666667) internal successors, (227), 3 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:51:18,541 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 23:51:18,541 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 129 [2022-09-20 23:51:18,542 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 23:51:18,994 INFO L130 PetriNetUnfolder]: 444/2451 cut-off events. [2022-09-20 23:51:18,995 INFO L131 PetriNetUnfolder]: For 592/592 co-relation queries the response was YES. [2022-09-20 23:51:18,999 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4672 conditions, 2451 events. 444/2451 cut-off events. For 592/592 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 19249 event pairs, 10 based on Foata normal form. 1641/3960 useless extension candidates. Maximal degree in co-relation 2294. Up to 1054 conditions per place. [2022-09-20 23:51:19,002 INFO L137 encePairwiseOnDemand]: 110/129 looper letters, 22 selfloop transitions, 4 changer transitions 56/141 dead transitions. [2022-09-20 23:51:19,002 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 141 transitions, 538 flow [2022-09-20 23:51:19,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-09-20 23:51:19,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-09-20 23:51:19,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 308 transitions. [2022-09-20 23:51:19,007 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7958656330749354 [2022-09-20 23:51:19,007 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 308 transitions. [2022-09-20 23:51:19,008 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 308 transitions. [2022-09-20 23:51:19,008 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 23:51:19,008 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 308 transitions. [2022-09-20 23:51:19,008 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 102.66666666666667) internal successors, (308), 3 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:51:19,011 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 129.0) internal successors, (516), 4 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:51:19,011 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 129.0) internal successors, (516), 4 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:51:19,011 INFO L175 Difference]: Start difference. First operand has 123 places, 129 transitions, 336 flow. Second operand 3 states and 308 transitions. [2022-09-20 23:51:19,011 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 141 transitions, 538 flow [2022-09-20 23:51:19,016 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 141 transitions, 538 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-09-20 23:51:19,018 INFO L231 Difference]: Finished difference. Result has 117 places, 79 transitions, 218 flow [2022-09-20 23:51:19,019 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=129, PETRI_DIFFERENCE_MINUEND_FLOW=304, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=218, PETRI_PLACES=117, PETRI_TRANSITIONS=79} [2022-09-20 23:51:19,020 INFO L287 CegarLoopForPetriNet]: 123 programPoint places, -6 predicate places. [2022-09-20 23:51:19,020 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 79 transitions, 218 flow [2022-09-20 23:51:19,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 75.66666666666667) internal successors, (227), 3 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:51:19,020 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 23:51:19,020 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 23:51:19,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-09-20 23:51:19,021 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-09-20 23:51:19,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 23:51:19,021 INFO L85 PathProgramCache]: Analyzing trace with hash -1345279344, now seen corresponding path program 1 times [2022-09-20 23:51:19,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 23:51:19,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364080982] [2022-09-20 23:51:19,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 23:51:19,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 23:51:19,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-09-20 23:51:19,057 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-09-20 23:51:19,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-09-20 23:51:19,087 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-09-20 23:51:19,088 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-09-20 23:51:19,088 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2022-09-20 23:51:19,088 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2022-09-20 23:51:19,089 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 6 remaining) [2022-09-20 23:51:19,089 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2022-09-20 23:51:19,089 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2022-09-20 23:51:19,089 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2022-09-20 23:51:19,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-09-20 23:51:19,089 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1] [2022-09-20 23:51:19,090 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-09-20 23:51:19,090 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-09-20 23:51:19,126 INFO L144 ThreadInstanceAdder]: Constructed 16 joinOtherThreadTransitions. [2022-09-20 23:51:19,127 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 141 places, 148 transitions, 408 flow [2022-09-20 23:51:20,004 INFO L130 PetriNetUnfolder]: 2379/8746 cut-off events. [2022-09-20 23:51:20,004 INFO L131 PetriNetUnfolder]: For 2144/2144 co-relation queries the response was YES. [2022-09-20 23:51:20,056 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10911 conditions, 8746 events. 2379/8746 cut-off events. For 2144/2144 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 75061 event pairs, 626 based on Foata normal form. 0/7622 useless extension candidates. Maximal degree in co-relation 5388. Up to 1024 conditions per place. [2022-09-20 23:51:20,056 INFO L82 GeneralOperation]: Start removeDead. Operand has 141 places, 148 transitions, 408 flow [2022-09-20 23:51:20,098 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 141 places, 148 transitions, 408 flow [2022-09-20 23:51:20,099 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-09-20 23:51:20,099 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;@10c17634, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-09-20 23:51:20,099 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-09-20 23:51:20,102 INFO L130 PetriNetUnfolder]: 6/69 cut-off events. [2022-09-20 23:51:20,102 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-09-20 23:51:20,102 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 23:51:20,102 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 23:51:20,103 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-09-20 23:51:20,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 23:51:20,103 INFO L85 PathProgramCache]: Analyzing trace with hash 2000248789, now seen corresponding path program 1 times [2022-09-20 23:51:20,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 23:51:20,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813974968] [2022-09-20 23:51:20,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 23:51:20,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 23:51:20,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 23:51:20,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 23:51:20,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 23:51:20,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813974968] [2022-09-20 23:51:20,118 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813974968] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-20 23:51:20,118 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-20 23:51:20,118 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-09-20 23:51:20,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146517491] [2022-09-20 23:51:20,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-20 23:51:20,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-09-20 23:51:20,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 23:51:20,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-09-20 23:51:20,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-09-20 23:51:20,119 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 148 [2022-09-20 23:51:20,120 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 148 transitions, 408 flow. Second operand has 2 states, 2 states have (on average 109.5) internal successors, (219), 2 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:51:20,120 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 23:51:20,120 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 148 [2022-09-20 23:51:20,120 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 23:51:20,988 INFO L130 PetriNetUnfolder]: 1817/8124 cut-off events. [2022-09-20 23:51:20,988 INFO L131 PetriNetUnfolder]: For 6300/6300 co-relation queries the response was YES. [2022-09-20 23:51:21,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12362 conditions, 8124 events. 1817/8124 cut-off events. For 6300/6300 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 74169 event pairs, 313 based on Foata normal form. 1608/9190 useless extension candidates. Maximal degree in co-relation 5959. Up to 2073 conditions per place. [2022-09-20 23:51:21,020 INFO L137 encePairwiseOnDemand]: 140/148 looper letters, 8 selfloop transitions, 0 changer transitions 40/128 dead transitions. [2022-09-20 23:51:21,021 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 128 transitions, 416 flow [2022-09-20 23:51:21,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-09-20 23:51:21,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-09-20 23:51:21,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 248 transitions. [2022-09-20 23:51:21,022 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8378378378378378 [2022-09-20 23:51:21,022 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 248 transitions. [2022-09-20 23:51:21,022 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 248 transitions. [2022-09-20 23:51:21,022 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 23:51:21,022 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 248 transitions. [2022-09-20 23:51:21,023 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 124.0) internal successors, (248), 2 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:51:21,023 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 148.0) internal successors, (444), 3 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:51:21,024 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 148.0) internal successors, (444), 3 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:51:21,024 INFO L175 Difference]: Start difference. First operand has 141 places, 148 transitions, 408 flow. Second operand 2 states and 248 transitions. [2022-09-20 23:51:21,024 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 128 transitions, 416 flow [2022-09-20 23:51:21,029 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 128 transitions, 416 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-09-20 23:51:21,031 INFO L231 Difference]: Finished difference. Result has 130 places, 88 transitions, 240 flow [2022-09-20 23:51:21,031 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=148, PETRI_DIFFERENCE_MINUEND_FLOW=368, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=240, PETRI_PLACES=130, PETRI_TRANSITIONS=88} [2022-09-20 23:51:21,032 INFO L287 CegarLoopForPetriNet]: 141 programPoint places, -11 predicate places. [2022-09-20 23:51:21,032 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 88 transitions, 240 flow [2022-09-20 23:51:21,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 109.5) internal successors, (219), 2 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:51:21,032 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 23:51:21,033 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 23:51:21,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-09-20 23:51:21,034 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-09-20 23:51:21,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 23:51:21,034 INFO L85 PathProgramCache]: Analyzing trace with hash 160100486, now seen corresponding path program 1 times [2022-09-20 23:51:21,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 23:51:21,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315287015] [2022-09-20 23:51:21,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 23:51:21,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 23:51:21,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-09-20 23:51:21,075 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-09-20 23:51:21,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-09-20 23:51:21,103 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-09-20 23:51:21,103 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-09-20 23:51:21,103 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2022-09-20 23:51:21,103 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION (5 of 7 remaining) [2022-09-20 23:51:21,103 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 7 remaining) [2022-09-20 23:51:21,104 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 7 remaining) [2022-09-20 23:51:21,104 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 7 remaining) [2022-09-20 23:51:21,104 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 7 remaining) [2022-09-20 23:51:21,104 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 7 remaining) [2022-09-20 23:51:21,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-09-20 23:51:21,104 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1] [2022-09-20 23:51:21,105 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2022-09-20 23:51:21,105 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2022-09-20 23:51:21,148 INFO L144 ThreadInstanceAdder]: Constructed 20 joinOtherThreadTransitions. [2022-09-20 23:51:21,150 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 159 places, 167 transitions, 484 flow [2022-09-20 23:51:25,503 INFO L130 PetriNetUnfolder]: 11372/35606 cut-off events. [2022-09-20 23:51:25,503 INFO L131 PetriNetUnfolder]: For 10450/10450 co-relation queries the response was YES. [2022-09-20 23:51:25,961 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46032 conditions, 35606 events. 11372/35606 cut-off events. For 10450/10450 co-relation queries the response was YES. Maximal size of possible extension queue 515. Compared 379342 event pairs, 4296 based on Foata normal form. 0/31366 useless extension candidates. Maximal degree in co-relation 22301. Up to 5120 conditions per place. [2022-09-20 23:51:25,961 INFO L82 GeneralOperation]: Start removeDead. Operand has 159 places, 167 transitions, 484 flow [2022-09-20 23:51:26,135 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 159 places, 167 transitions, 484 flow [2022-09-20 23:51:26,136 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-09-20 23:51:26,136 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;@10c17634, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-09-20 23:51:26,136 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2022-09-20 23:51:26,139 INFO L130 PetriNetUnfolder]: 6/70 cut-off events. [2022-09-20 23:51:26,139 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-09-20 23:51:26,139 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 23:51:26,140 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 23:51:26,140 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2022-09-20 23:51:26,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 23:51:26,140 INFO L85 PathProgramCache]: Analyzing trace with hash -1616139133, now seen corresponding path program 1 times [2022-09-20 23:51:26,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 23:51:26,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548915356] [2022-09-20 23:51:26,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 23:51:26,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 23:51:26,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 23:51:26,159 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 23:51:26,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 23:51:26,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548915356] [2022-09-20 23:51:26,160 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548915356] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-20 23:51:26,160 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-20 23:51:26,160 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-09-20 23:51:26,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793355412] [2022-09-20 23:51:26,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-20 23:51:26,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-09-20 23:51:26,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 23:51:26,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-09-20 23:51:26,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-09-20 23:51:26,161 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 167 [2022-09-20 23:51:26,162 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 167 transitions, 484 flow. Second operand has 3 states, 3 states have (on average 95.66666666666667) internal successors, (287), 3 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:51:26,162 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 23:51:26,162 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 167 [2022-09-20 23:51:26,162 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 23:51:32,129 INFO L130 PetriNetUnfolder]: 13354/43665 cut-off events. [2022-09-20 23:51:32,129 INFO L131 PetriNetUnfolder]: For 15570/15570 co-relation queries the response was YES. [2022-09-20 23:51:32,549 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90314 conditions, 43665 events. 13354/43665 cut-off events. For 15570/15570 co-relation queries the response was YES. Maximal size of possible extension queue 770. Compared 509295 event pairs, 1312 based on Foata normal form. 44070/85669 useless extension candidates. Maximal degree in co-relation 43352. Up to 21516 conditions per place. [2022-09-20 23:51:32,584 INFO L137 encePairwiseOnDemand]: 146/167 looper letters, 26 selfloop transitions, 4 changer transitions 72/179 dead transitions. [2022-09-20 23:51:32,584 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 179 transitions, 750 flow [2022-09-20 23:51:32,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-09-20 23:51:32,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-09-20 23:51:32,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 392 transitions. [2022-09-20 23:51:32,585 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.782435129740519 [2022-09-20 23:51:32,585 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 392 transitions. [2022-09-20 23:51:32,585 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 392 transitions. [2022-09-20 23:51:32,586 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 23:51:32,586 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 392 transitions. [2022-09-20 23:51:32,586 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 130.66666666666666) internal successors, (392), 3 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:51:32,587 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 167.0) internal successors, (668), 4 states have internal predecessors, (668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:51:32,588 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 167.0) internal successors, (668), 4 states have internal predecessors, (668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:51:32,588 INFO L175 Difference]: Start difference. First operand has 159 places, 167 transitions, 484 flow. Second operand 3 states and 392 transitions. [2022-09-20 23:51:32,588 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 179 transitions, 750 flow [2022-09-20 23:51:32,602 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 179 transitions, 750 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-09-20 23:51:32,603 INFO L231 Difference]: Finished difference. Result has 147 places, 101 transitions, 310 flow [2022-09-20 23:51:32,604 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=167, PETRI_DIFFERENCE_MINUEND_FLOW=436, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=310, PETRI_PLACES=147, PETRI_TRANSITIONS=101} [2022-09-20 23:51:32,604 INFO L287 CegarLoopForPetriNet]: 159 programPoint places, -12 predicate places. [2022-09-20 23:51:32,604 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 101 transitions, 310 flow [2022-09-20 23:51:32,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 95.66666666666667) internal successors, (287), 3 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:51:32,605 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 23:51:32,605 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 23:51:32,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-09-20 23:51:32,605 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2022-09-20 23:51:32,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 23:51:32,605 INFO L85 PathProgramCache]: Analyzing trace with hash -1568276886, now seen corresponding path program 1 times [2022-09-20 23:51:32,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 23:51:32,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824050669] [2022-09-20 23:51:32,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 23:51:32,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 23:51:32,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-09-20 23:51:32,621 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-09-20 23:51:32,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-09-20 23:51:32,636 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-09-20 23:51:32,636 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-09-20 23:51:32,636 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (7 of 8 remaining) [2022-09-20 23:51:32,636 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION (6 of 8 remaining) [2022-09-20 23:51:32,637 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 8 remaining) [2022-09-20 23:51:32,637 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION (4 of 8 remaining) [2022-09-20 23:51:32,637 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 8 remaining) [2022-09-20 23:51:32,637 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 8 remaining) [2022-09-20 23:51:32,637 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 8 remaining) [2022-09-20 23:51:32,637 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 8 remaining) [2022-09-20 23:51:32,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-09-20 23:51:32,637 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1] [2022-09-20 23:51:32,638 WARN L233 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2022-09-20 23:51:32,638 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2022-09-20 23:51:32,657 INFO L144 ThreadInstanceAdder]: Constructed 24 joinOtherThreadTransitions. [2022-09-20 23:51:32,659 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 177 places, 186 transitions, 564 flow [2022-09-20 23:51:55,231 INFO L130 PetriNetUnfolder]: 53395/148524 cut-off events. [2022-09-20 23:51:55,232 INFO L131 PetriNetUnfolder]: For 49552/49552 co-relation queries the response was YES. [2022-09-20 23:51:58,043 INFO L83 FinitePrefix]: Finished finitePrefix Result has 197953 conditions, 148524 events. 53395/148524 cut-off events. For 49552/49552 co-relation queries the response was YES. Maximal size of possible extension queue 1969. Compared 1879409 event pairs, 24930 based on Foata normal form. 0/131944 useless extension candidates. Maximal degree in co-relation 95341. Up to 24576 conditions per place. [2022-09-20 23:51:58,043 INFO L82 GeneralOperation]: Start removeDead. Operand has 177 places, 186 transitions, 564 flow [2022-09-20 23:51:59,390 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 177 places, 186 transitions, 564 flow [2022-09-20 23:51:59,391 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-09-20 23:51:59,391 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;@10c17634, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-09-20 23:51:59,391 INFO L358 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2022-09-20 23:51:59,394 INFO L130 PetriNetUnfolder]: 6/67 cut-off events. [2022-09-20 23:51:59,394 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-09-20 23:51:59,394 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 23:51:59,394 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 23:51:59,394 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2022-09-20 23:51:59,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 23:51:59,394 INFO L85 PathProgramCache]: Analyzing trace with hash 1222122491, now seen corresponding path program 1 times [2022-09-20 23:51:59,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 23:51:59,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765360639] [2022-09-20 23:51:59,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 23:51:59,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 23:51:59,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 23:51:59,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 23:51:59,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 23:51:59,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765360639] [2022-09-20 23:51:59,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765360639] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-20 23:51:59,406 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-20 23:51:59,406 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-09-20 23:51:59,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067602918] [2022-09-20 23:51:59,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-20 23:51:59,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-09-20 23:51:59,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 23:51:59,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-09-20 23:51:59,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-09-20 23:51:59,407 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 186 [2022-09-20 23:51:59,407 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 186 transitions, 564 flow. Second operand has 2 states, 2 states have (on average 129.5) internal successors, (259), 2 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:51:59,407 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 23:51:59,407 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 186 [2022-09-20 23:51:59,407 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 23:52:20,107 INFO L130 PetriNetUnfolder]: 45105/140108 cut-off events. [2022-09-20 23:52:20,107 INFO L131 PetriNetUnfolder]: For 148024/148024 co-relation queries the response was YES. [2022-09-20 23:52:21,470 INFO L83 FinitePrefix]: Finished finitePrefix Result has 238738 conditions, 140108 events. 45105/140108 cut-off events. For 148024/148024 co-relation queries the response was YES. Maximal size of possible extension queue 1870. Compared 1854364 event pairs, 12465 based on Foata normal form. 32959/164819 useless extension candidates. Maximal degree in co-relation 113622. Up to 49201 conditions per place. [2022-09-20 23:52:21,562 INFO L137 encePairwiseOnDemand]: 176/186 looper letters, 12 selfloop transitions, 0 changer transitions 48/158 dead transitions. [2022-09-20 23:52:21,562 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 158 transitions, 580 flow [2022-09-20 23:52:21,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-09-20 23:52:21,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-09-20 23:52:21,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 302 transitions. [2022-09-20 23:52:21,563 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8118279569892473 [2022-09-20 23:52:21,564 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 302 transitions. [2022-09-20 23:52:21,564 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 302 transitions. [2022-09-20 23:52:21,564 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 23:52:21,564 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 302 transitions. [2022-09-20 23:52:21,564 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 151.0) internal successors, (302), 2 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:52:21,565 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 186.0) internal successors, (558), 3 states have internal predecessors, (558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:52:21,565 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 186.0) internal successors, (558), 3 states have internal predecessors, (558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:52:21,565 INFO L175 Difference]: Start difference. First operand has 177 places, 186 transitions, 564 flow. Second operand 2 states and 302 transitions. [2022-09-20 23:52:21,566 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 158 transitions, 580 flow [2022-09-20 23:52:21,600 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 158 transitions, 580 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-09-20 23:52:21,601 INFO L231 Difference]: Finished difference. Result has 160 places, 110 transitions, 340 flow [2022-09-20 23:52:21,602 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=508, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=340, PETRI_PLACES=160, PETRI_TRANSITIONS=110} [2022-09-20 23:52:21,602 INFO L287 CegarLoopForPetriNet]: 177 programPoint places, -17 predicate places. [2022-09-20 23:52:21,602 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 110 transitions, 340 flow [2022-09-20 23:52:21,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 129.5) internal successors, (259), 2 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:52:21,602 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 23:52:21,603 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 23:52:21,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-09-20 23:52:21,603 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2022-09-20 23:52:21,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 23:52:21,603 INFO L85 PathProgramCache]: Analyzing trace with hash -1941409124, now seen corresponding path program 1 times [2022-09-20 23:52:21,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 23:52:21,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948605952] [2022-09-20 23:52:21,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 23:52:21,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 23:52:21,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-09-20 23:52:21,616 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-09-20 23:52:21,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-09-20 23:52:21,628 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-09-20 23:52:21,628 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-09-20 23:52:21,629 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (8 of 9 remaining) [2022-09-20 23:52:21,629 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION (7 of 9 remaining) [2022-09-20 23:52:21,629 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 9 remaining) [2022-09-20 23:52:21,629 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION (5 of 9 remaining) [2022-09-20 23:52:21,629 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION (4 of 9 remaining) [2022-09-20 23:52:21,629 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 9 remaining) [2022-09-20 23:52:21,629 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 9 remaining) [2022-09-20 23:52:21,629 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 9 remaining) [2022-09-20 23:52:21,629 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 9 remaining) [2022-09-20 23:52:21,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-09-20 23:52:21,629 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1] [2022-09-20 23:52:21,630 WARN L233 ceAbstractionStarter]: 6 thread instances were not sufficient, I will increase this number and restart the analysis [2022-09-20 23:52:21,630 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 7 thread instances. [2022-09-20 23:52:21,649 INFO L144 ThreadInstanceAdder]: Constructed 28 joinOtherThreadTransitions. [2022-09-20 23:52:21,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 195 places, 205 transitions, 648 flow