/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/pthread-ext/29_conditionals_vs.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-b8dbc81 [2023-01-27 17:56:08,932 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-01-27 17:56:08,934 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-01-27 17:56:08,974 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-01-27 17:56:08,975 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-01-27 17:56:08,977 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-01-27 17:56:08,979 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-01-27 17:56:08,980 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-01-27 17:56:08,982 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-01-27 17:56:08,986 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-01-27 17:56:08,987 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-01-27 17:56:08,989 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-01-27 17:56:08,989 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-01-27 17:56:08,991 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-01-27 17:56:08,992 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-01-27 17:56:08,993 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-01-27 17:56:08,994 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-01-27 17:56:08,995 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-01-27 17:56:08,996 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-01-27 17:56:09,001 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-01-27 17:56:09,002 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-01-27 17:56:09,003 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-01-27 17:56:09,003 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-01-27 17:56:09,005 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-01-27 17:56:09,016 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-01-27 17:56:09,022 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-01-27 17:56:09,023 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-01-27 17:56:09,023 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-01-27 17:56:09,027 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf [2023-01-27 17:56:09,053 INFO L113 SettingsManager]: Loading preferences was successful [2023-01-27 17:56:09,054 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-01-27 17:56:09,055 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-01-27 17:56:09,055 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-01-27 17:56:09,056 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-01-27 17:56:09,056 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-01-27 17:56:09,056 INFO L138 SettingsManager]: * Use SBE=true [2023-01-27 17:56:09,056 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-01-27 17:56:09,056 INFO L138 SettingsManager]: * sizeof long=4 [2023-01-27 17:56:09,057 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-01-27 17:56:09,057 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-01-27 17:56:09,057 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-01-27 17:56:09,058 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-01-27 17:56:09,058 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-01-27 17:56:09,058 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-01-27 17:56:09,058 INFO L138 SettingsManager]: * sizeof long double=12 [2023-01-27 17:56:09,058 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-01-27 17:56:09,058 INFO L138 SettingsManager]: * Use constant arrays=true [2023-01-27 17:56:09,058 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-01-27 17:56:09,059 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-01-27 17:56:09,059 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-01-27 17:56:09,059 INFO L138 SettingsManager]: * To the following directory=./dump/ [2023-01-27 17:56:09,059 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-01-27 17:56:09,059 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-27 17:56:09,059 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-01-27 17:56:09,060 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-01-27 17:56:09,060 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-01-27 17:56:09,060 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-01-27 17:56:09,060 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-01-27 17:56:09,060 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-01-27 17:56:09,060 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-01-27 17:56:09,061 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-01-27 17:56:09,264 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-01-27 17:56:09,286 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-01-27 17:56:09,288 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-01-27 17:56:09,289 INFO L271 PluginConnector]: Initializing CDTParser... [2023-01-27 17:56:09,290 INFO L275 PluginConnector]: CDTParser initialized [2023-01-27 17:56:09,292 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/29_conditionals_vs.i [2023-01-27 17:56:10,556 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-01-27 17:56:10,727 INFO L351 CDTParser]: Found 1 translation units. [2023-01-27 17:56:10,727 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/29_conditionals_vs.i [2023-01-27 17:56:10,737 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c3fe7143e/a11c6475f15a434faf5eeb0af3941886/FLAGf2962aec5 [2023-01-27 17:56:10,753 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c3fe7143e/a11c6475f15a434faf5eeb0af3941886 [2023-01-27 17:56:10,755 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-01-27 17:56:10,756 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2023-01-27 17:56:10,763 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-01-27 17:56:10,764 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-01-27 17:56:10,766 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-01-27 17:56:10,767 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 05:56:10" (1/1) ... [2023-01-27 17:56:10,768 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c5d0e30 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 05:56:10, skipping insertion in model container [2023-01-27 17:56:10,768 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 05:56:10" (1/1) ... [2023-01-27 17:56:10,774 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-01-27 17:56:10,817 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-01-27 17:56:11,072 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/29_conditionals_vs.i[30422,30435] [2023-01-27 17:56:11,081 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-27 17:56:11,091 INFO L203 MainTranslator]: Completed pre-run [2023-01-27 17:56:11,134 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/29_conditionals_vs.i[30422,30435] [2023-01-27 17:56:11,137 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-27 17:56:11,169 INFO L208 MainTranslator]: Completed translation [2023-01-27 17:56:11,170 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 05:56:11 WrapperNode [2023-01-27 17:56:11,170 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-01-27 17:56:11,171 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-01-27 17:56:11,171 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-01-27 17:56:11,171 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-01-27 17:56:11,177 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 05:56:11" (1/1) ... [2023-01-27 17:56:11,202 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 05:56:11" (1/1) ... [2023-01-27 17:56:11,220 INFO L138 Inliner]: procedures = 170, calls = 14, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 61 [2023-01-27 17:56:11,220 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-01-27 17:56:11,221 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-01-27 17:56:11,221 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-01-27 17:56:11,221 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-01-27 17:56:11,227 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 05:56:11" (1/1) ... [2023-01-27 17:56:11,227 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 05:56:11" (1/1) ... [2023-01-27 17:56:11,229 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 05:56:11" (1/1) ... [2023-01-27 17:56:11,229 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 05:56:11" (1/1) ... [2023-01-27 17:56:11,233 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 05:56:11" (1/1) ... [2023-01-27 17:56:11,236 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 05:56:11" (1/1) ... [2023-01-27 17:56:11,242 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 05:56:11" (1/1) ... [2023-01-27 17:56:11,243 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 05:56:11" (1/1) ... [2023-01-27 17:56:11,245 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-01-27 17:56:11,245 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-01-27 17:56:11,246 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-01-27 17:56:11,246 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-01-27 17:56:11,246 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 05:56:11" (1/1) ... [2023-01-27 17:56:11,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-27 17:56:11,261 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 17:56:11,272 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-01-27 17:56:11,285 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-01-27 17:56:11,303 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-01-27 17:56:11,303 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-01-27 17:56:11,303 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-01-27 17:56:11,304 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-01-27 17:56:11,304 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-01-27 17:56:11,304 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-01-27 17:56:11,304 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-01-27 17:56:11,304 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-01-27 17:56:11,304 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-01-27 17:56:11,305 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-01-27 17:56:11,444 INFO L236 CfgBuilder]: Building ICFG [2023-01-27 17:56:11,446 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-01-27 17:56:11,608 INFO L277 CfgBuilder]: Performing block encoding [2023-01-27 17:56:11,646 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-01-27 17:56:11,646 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-01-27 17:56:11,649 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 05:56:11 BoogieIcfgContainer [2023-01-27 17:56:11,649 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-01-27 17:56:11,651 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-01-27 17:56:11,651 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-01-27 17:56:11,655 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-01-27 17:56:11,655 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.01 05:56:10" (1/3) ... [2023-01-27 17:56:11,655 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62860162 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 05:56:11, skipping insertion in model container [2023-01-27 17:56:11,655 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 05:56:11" (2/3) ... [2023-01-27 17:56:11,656 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62860162 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 05:56:11, skipping insertion in model container [2023-01-27 17:56:11,656 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 05:56:11" (3/3) ... [2023-01-27 17:56:11,657 INFO L112 eAbstractionObserver]: Analyzing ICFG 29_conditionals_vs.i [2023-01-27 17:56:11,671 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-01-27 17:56:11,671 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-01-27 17:56:11,671 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-01-27 17:56:11,719 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-01-27 17:56:11,743 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 54 transitions, 113 flow [2023-01-27 17:56:11,790 INFO L130 PetriNetUnfolder]: 6/64 cut-off events. [2023-01-27 17:56:11,790 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-27 17:56:11,795 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69 conditions, 64 events. 6/64 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 61 event pairs, 0 based on Foata normal form. 0/55 useless extension candidates. Maximal degree in co-relation 41. Up to 4 conditions per place. [2023-01-27 17:56:11,795 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 54 transitions, 113 flow [2023-01-27 17:56:11,798 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 52 places, 54 transitions, 113 flow [2023-01-27 17:56:11,801 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-27 17:56:11,809 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 52 places, 54 transitions, 113 flow [2023-01-27 17:56:11,811 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 52 places, 54 transitions, 113 flow [2023-01-27 17:56:11,811 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 54 transitions, 113 flow [2023-01-27 17:56:11,825 INFO L130 PetriNetUnfolder]: 6/64 cut-off events. [2023-01-27 17:56:11,825 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-27 17:56:11,826 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69 conditions, 64 events. 6/64 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 61 event pairs, 0 based on Foata normal form. 0/55 useless extension candidates. Maximal degree in co-relation 41. Up to 4 conditions per place. [2023-01-27 17:56:11,827 INFO L119 LiptonReduction]: Number of co-enabled transitions 754 [2023-01-27 17:56:13,419 INFO L134 LiptonReduction]: Checked pairs total: 611 [2023-01-27 17:56:13,420 INFO L136 LiptonReduction]: Total number of compositions: 54 [2023-01-27 17:56:13,432 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-27 17:56:13,437 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;@25fc035e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-27 17:56:13,437 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-01-27 17:56:13,440 INFO L130 PetriNetUnfolder]: 0/6 cut-off events. [2023-01-27 17:56:13,440 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-27 17:56:13,440 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 17:56:13,440 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-01-27 17:56:13,441 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-27 17:56:13,445 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 17:56:13,445 INFO L85 PathProgramCache]: Analyzing trace with hash 8574729, now seen corresponding path program 1 times [2023-01-27 17:56:13,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 17:56:13,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274490596] [2023-01-27 17:56:13,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 17:56:13,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 17:56:13,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 17:56:13,599 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 17:56:13,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 17:56:13,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274490596] [2023-01-27 17:56:13,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274490596] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 17:56:13,600 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 17:56:13,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-01-27 17:56:13,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434691358] [2023-01-27 17:56:13,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 17:56:13,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-01-27 17:56:13,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 17:56:13,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-01-27 17:56:13,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-01-27 17:56:13,631 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 108 [2023-01-27 17:56:13,632 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 11 places, 8 transitions, 21 flow. Second operand has 2 states, 2 states have (on average 49.0) internal successors, (98), 2 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:56:13,633 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 17:56:13,633 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 108 [2023-01-27 17:56:13,633 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 17:56:13,646 INFO L130 PetriNetUnfolder]: 2/12 cut-off events. [2023-01-27 17:56:13,646 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-27 17:56:13,647 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29 conditions, 12 events. 2/12 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 10 event pairs, 2 based on Foata normal form. 0/12 useless extension candidates. Maximal degree in co-relation 14. Up to 11 conditions per place. [2023-01-27 17:56:13,647 INFO L137 encePairwiseOnDemand]: 106/108 looper letters, 5 selfloop transitions, 0 changer transitions 0/6 dead transitions. [2023-01-27 17:56:13,648 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 10 places, 6 transitions, 27 flow [2023-01-27 17:56:13,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-01-27 17:56:13,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-01-27 17:56:13,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 101 transitions. [2023-01-27 17:56:13,658 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4675925925925926 [2023-01-27 17:56:13,659 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 101 transitions. [2023-01-27 17:56:13,660 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 101 transitions. [2023-01-27 17:56:13,660 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 17:56:13,662 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 101 transitions. [2023-01-27 17:56:13,664 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 50.5) internal successors, (101), 2 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:56:13,676 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 108.0) internal successors, (324), 3 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:56:13,676 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 108.0) internal successors, (324), 3 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:56:13,678 INFO L175 Difference]: Start difference. First operand has 11 places, 8 transitions, 21 flow. Second operand 2 states and 101 transitions. [2023-01-27 17:56:13,678 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 10 places, 6 transitions, 27 flow [2023-01-27 17:56:13,680 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 10 places, 6 transitions, 27 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-01-27 17:56:13,681 INFO L231 Difference]: Finished difference. Result has 10 places, 6 transitions, 17 flow [2023-01-27 17:56:13,682 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=108, PETRI_DIFFERENCE_MINUEND_FLOW=17, PETRI_DIFFERENCE_MINUEND_PLACES=9, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=6, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=6, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=17, PETRI_PLACES=10, PETRI_TRANSITIONS=6} [2023-01-27 17:56:13,687 INFO L281 CegarLoopForPetriNet]: 11 programPoint places, -1 predicate places. [2023-01-27 17:56:13,687 INFO L495 AbstractCegarLoop]: Abstraction has has 10 places, 6 transitions, 17 flow [2023-01-27 17:56:13,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 49.0) internal successors, (98), 2 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:56:13,688 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 17:56:13,688 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-01-27 17:56:13,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-01-27 17:56:13,688 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-27 17:56:13,691 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 17:56:13,691 INFO L85 PathProgramCache]: Analyzing trace with hash -349651909, now seen corresponding path program 1 times [2023-01-27 17:56:13,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 17:56:13,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462291444] [2023-01-27 17:56:13,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 17:56:13,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 17:56:13,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 17:56:13,721 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-27 17:56:13,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 17:56:13,753 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-27 17:56:13,753 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-27 17:56:13,754 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-01-27 17:56:13,756 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2023-01-27 17:56:13,756 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2023-01-27 17:56:13,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-01-27 17:56:13,756 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-01-27 17:56:13,758 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-27 17:56:13,758 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-01-27 17:56:13,774 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-01-27 17:56:13,777 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 80 places, 84 transitions, 180 flow [2023-01-27 17:56:13,794 INFO L130 PetriNetUnfolder]: 11/106 cut-off events. [2023-01-27 17:56:13,794 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-27 17:56:13,795 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116 conditions, 106 events. 11/106 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 173 event pairs, 0 based on Foata normal form. 0/90 useless extension candidates. Maximal degree in co-relation 70. Up to 6 conditions per place. [2023-01-27 17:56:13,795 INFO L82 GeneralOperation]: Start removeDead. Operand has 80 places, 84 transitions, 180 flow [2023-01-27 17:56:13,796 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 80 places, 84 transitions, 180 flow [2023-01-27 17:56:13,796 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-27 17:56:13,796 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 80 places, 84 transitions, 180 flow [2023-01-27 17:56:13,797 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 80 places, 84 transitions, 180 flow [2023-01-27 17:56:13,797 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 80 places, 84 transitions, 180 flow [2023-01-27 17:56:13,811 INFO L130 PetriNetUnfolder]: 11/106 cut-off events. [2023-01-27 17:56:13,811 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-27 17:56:13,812 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116 conditions, 106 events. 11/106 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 173 event pairs, 0 based on Foata normal form. 0/90 useless extension candidates. Maximal degree in co-relation 70. Up to 6 conditions per place. [2023-01-27 17:56:13,814 INFO L119 LiptonReduction]: Number of co-enabled transitions 3248 [2023-01-27 17:56:15,841 INFO L134 LiptonReduction]: Checked pairs total: 3080 [2023-01-27 17:56:15,841 INFO L136 LiptonReduction]: Total number of compositions: 87 [2023-01-27 17:56:15,843 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-27 17:56:15,844 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;@25fc035e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-27 17:56:15,844 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-01-27 17:56:15,846 INFO L130 PetriNetUnfolder]: 0/5 cut-off events. [2023-01-27 17:56:15,846 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-27 17:56:15,846 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 17:56:15,846 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-01-27 17:56:15,846 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-01-27 17:56:15,847 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 17:56:15,847 INFO L85 PathProgramCache]: Analyzing trace with hash 14664199, now seen corresponding path program 1 times [2023-01-27 17:56:15,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 17:56:15,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9869910] [2023-01-27 17:56:15,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 17:56:15,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 17:56:15,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 17:56:15,869 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 17:56:15,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 17:56:15,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9869910] [2023-01-27 17:56:15,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9869910] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 17:56:15,870 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 17:56:15,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-01-27 17:56:15,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092845692] [2023-01-27 17:56:15,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 17:56:15,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-01-27 17:56:15,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 17:56:15,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-01-27 17:56:15,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-01-27 17:56:15,871 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 171 [2023-01-27 17:56:15,872 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 18 transitions, 48 flow. Second operand has 2 states, 2 states have (on average 74.0) internal successors, (148), 2 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:56:15,872 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 17:56:15,872 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 171 [2023-01-27 17:56:15,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 17:56:15,894 INFO L130 PetriNetUnfolder]: 20/57 cut-off events. [2023-01-27 17:56:15,894 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2023-01-27 17:56:15,895 INFO L83 FinitePrefix]: Finished finitePrefix Result has 124 conditions, 57 events. 20/57 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 163 event pairs, 20 based on Foata normal form. 0/53 useless extension candidates. Maximal degree in co-relation 28. Up to 47 conditions per place. [2023-01-27 17:56:15,895 INFO L137 encePairwiseOnDemand]: 166/171 looper letters, 8 selfloop transitions, 0 changer transitions 0/11 dead transitions. [2023-01-27 17:56:15,895 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 17 places, 11 transitions, 50 flow [2023-01-27 17:56:15,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-01-27 17:56:15,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-01-27 17:56:15,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 157 transitions. [2023-01-27 17:56:15,897 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4590643274853801 [2023-01-27 17:56:15,897 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 157 transitions. [2023-01-27 17:56:15,897 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 157 transitions. [2023-01-27 17:56:15,898 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 17:56:15,898 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 157 transitions. [2023-01-27 17:56:15,899 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 78.5) internal successors, (157), 2 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:56:15,900 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 171.0) internal successors, (513), 3 states have internal predecessors, (513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:56:15,900 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 171.0) internal successors, (513), 3 states have internal predecessors, (513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:56:15,900 INFO L175 Difference]: Start difference. First operand has 21 places, 18 transitions, 48 flow. Second operand 2 states and 157 transitions. [2023-01-27 17:56:15,900 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 17 places, 11 transitions, 50 flow [2023-01-27 17:56:15,901 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 17 places, 11 transitions, 48 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-01-27 17:56:15,901 INFO L231 Difference]: Finished difference. Result has 17 places, 11 transitions, 32 flow [2023-01-27 17:56:15,901 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=32, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=11, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=32, PETRI_PLACES=17, PETRI_TRANSITIONS=11} [2023-01-27 17:56:15,902 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, -4 predicate places. [2023-01-27 17:56:15,902 INFO L495 AbstractCegarLoop]: Abstraction has has 17 places, 11 transitions, 32 flow [2023-01-27 17:56:15,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 74.0) internal successors, (148), 2 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:56:15,902 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 17:56:15,902 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-01-27 17:56:15,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-01-27 17:56:15,903 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-01-27 17:56:15,903 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 17:56:15,903 INFO L85 PathProgramCache]: Analyzing trace with hash -1782016936, now seen corresponding path program 1 times [2023-01-27 17:56:15,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 17:56:15,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079920630] [2023-01-27 17:56:15,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 17:56:15,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 17:56:15,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 17:56:15,917 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-27 17:56:15,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 17:56:15,929 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-27 17:56:15,929 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-27 17:56:15,929 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-01-27 17:56:15,929 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-01-27 17:56:15,929 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2023-01-27 17:56:15,930 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2023-01-27 17:56:15,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-01-27 17:56:15,930 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-01-27 17:56:15,931 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-27 17:56:15,931 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-01-27 17:56:15,948 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-01-27 17:56:15,950 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 108 places, 114 transitions, 249 flow [2023-01-27 17:56:15,968 INFO L130 PetriNetUnfolder]: 16/148 cut-off events. [2023-01-27 17:56:15,968 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-01-27 17:56:15,969 INFO L83 FinitePrefix]: Finished finitePrefix Result has 164 conditions, 148 events. 16/148 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 325 event pairs, 0 based on Foata normal form. 0/125 useless extension candidates. Maximal degree in co-relation 110. Up to 8 conditions per place. [2023-01-27 17:56:15,969 INFO L82 GeneralOperation]: Start removeDead. Operand has 108 places, 114 transitions, 249 flow [2023-01-27 17:56:15,970 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 108 places, 114 transitions, 249 flow [2023-01-27 17:56:15,971 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-27 17:56:15,971 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 108 places, 114 transitions, 249 flow [2023-01-27 17:56:15,971 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 108 places, 114 transitions, 249 flow [2023-01-27 17:56:15,971 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 108 places, 114 transitions, 249 flow [2023-01-27 17:56:15,985 INFO L130 PetriNetUnfolder]: 16/148 cut-off events. [2023-01-27 17:56:15,985 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-01-27 17:56:15,986 INFO L83 FinitePrefix]: Finished finitePrefix Result has 164 conditions, 148 events. 16/148 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 325 event pairs, 0 based on Foata normal form. 0/125 useless extension candidates. Maximal degree in co-relation 110. Up to 8 conditions per place. [2023-01-27 17:56:15,989 INFO L119 LiptonReduction]: Number of co-enabled transitions 7482 [2023-01-27 17:56:18,877 INFO L134 LiptonReduction]: Checked pairs total: 6877 [2023-01-27 17:56:18,877 INFO L136 LiptonReduction]: Total number of compositions: 123 [2023-01-27 17:56:18,879 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-27 17:56:18,880 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;@25fc035e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-27 17:56:18,880 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-01-27 17:56:18,881 INFO L130 PetriNetUnfolder]: 0/6 cut-off events. [2023-01-27 17:56:18,882 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-27 17:56:18,882 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 17:56:18,882 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-01-27 17:56:18,882 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-01-27 17:56:18,882 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 17:56:18,882 INFO L85 PathProgramCache]: Analyzing trace with hash 22621949, now seen corresponding path program 1 times [2023-01-27 17:56:18,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 17:56:18,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806894054] [2023-01-27 17:56:18,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 17:56:18,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 17:56:18,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 17:56:18,901 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 17:56:18,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 17:56:18,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806894054] [2023-01-27 17:56:18,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806894054] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 17:56:18,902 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 17:56:18,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-01-27 17:56:18,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673971373] [2023-01-27 17:56:18,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 17:56:18,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-01-27 17:56:18,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 17:56:18,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-01-27 17:56:18,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-01-27 17:56:18,904 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 237 [2023-01-27 17:56:18,904 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 18 transitions, 57 flow. Second operand has 2 states, 2 states have (on average 99.0) internal successors, (198), 2 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:56:18,904 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 17:56:18,904 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 237 [2023-01-27 17:56:18,904 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 17:56:18,940 INFO L130 PetriNetUnfolder]: 110/225 cut-off events. [2023-01-27 17:56:18,941 INFO L131 PetriNetUnfolder]: For 79/79 co-relation queries the response was YES. [2023-01-27 17:56:18,941 INFO L83 FinitePrefix]: Finished finitePrefix Result has 494 conditions, 225 events. 110/225 cut-off events. For 79/79 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 896 event pairs, 110 based on Foata normal form. 0/211 useless extension candidates. Maximal degree in co-relation 127. Up to 191 conditions per place. [2023-01-27 17:56:18,942 INFO L137 encePairwiseOnDemand]: 233/237 looper letters, 11 selfloop transitions, 0 changer transitions 0/14 dead transitions. [2023-01-27 17:56:18,942 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 14 transitions, 71 flow [2023-01-27 17:56:18,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-01-27 17:56:18,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-01-27 17:56:18,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 209 transitions. [2023-01-27 17:56:18,945 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4409282700421941 [2023-01-27 17:56:18,945 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 209 transitions. [2023-01-27 17:56:18,945 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 209 transitions. [2023-01-27 17:56:18,945 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 17:56:18,946 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 209 transitions. [2023-01-27 17:56:18,947 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 104.5) internal successors, (209), 2 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:56:18,948 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 237.0) internal successors, (711), 3 states have internal predecessors, (711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:56:18,948 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 237.0) internal successors, (711), 3 states have internal predecessors, (711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:56:18,948 INFO L175 Difference]: Start difference. First operand has 25 places, 18 transitions, 57 flow. Second operand 2 states and 209 transitions. [2023-01-27 17:56:18,948 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 14 transitions, 71 flow [2023-01-27 17:56:18,949 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 14 transitions, 65 flow, removed 3 selfloop flow, removed 0 redundant places. [2023-01-27 17:56:18,949 INFO L231 Difference]: Finished difference. Result has 22 places, 14 transitions, 43 flow [2023-01-27 17:56:18,950 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=237, PETRI_DIFFERENCE_MINUEND_FLOW=43, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=14, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=43, PETRI_PLACES=22, PETRI_TRANSITIONS=14} [2023-01-27 17:56:18,950 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, -3 predicate places. [2023-01-27 17:56:18,951 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 14 transitions, 43 flow [2023-01-27 17:56:18,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 99.0) internal successors, (198), 2 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:56:18,951 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 17:56:18,951 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-01-27 17:56:18,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-01-27 17:56:18,951 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-01-27 17:56:18,952 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 17:56:18,952 INFO L85 PathProgramCache]: Analyzing trace with hash -629585071, now seen corresponding path program 1 times [2023-01-27 17:56:18,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 17:56:18,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403327303] [2023-01-27 17:56:18,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 17:56:18,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 17:56:18,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 17:56:18,966 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-27 17:56:18,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 17:56:18,980 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-27 17:56:18,980 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-27 17:56:18,980 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2023-01-27 17:56:18,980 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2023-01-27 17:56:18,981 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2023-01-27 17:56:18,981 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2023-01-27 17:56:18,981 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2023-01-27 17:56:18,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-01-27 17:56:18,981 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-01-27 17:56:18,982 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-27 17:56:18,982 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-01-27 17:56:19,001 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-01-27 17:56:19,003 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 136 places, 144 transitions, 320 flow [2023-01-27 17:56:19,021 INFO L130 PetriNetUnfolder]: 21/190 cut-off events. [2023-01-27 17:56:19,021 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-01-27 17:56:19,022 INFO L83 FinitePrefix]: Finished finitePrefix Result has 213 conditions, 190 events. 21/190 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 475 event pairs, 0 based on Foata normal form. 0/160 useless extension candidates. Maximal degree in co-relation 156. Up to 10 conditions per place. [2023-01-27 17:56:19,022 INFO L82 GeneralOperation]: Start removeDead. Operand has 136 places, 144 transitions, 320 flow [2023-01-27 17:56:19,023 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 136 places, 144 transitions, 320 flow [2023-01-27 17:56:19,024 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-27 17:56:19,024 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 136 places, 144 transitions, 320 flow [2023-01-27 17:56:19,024 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 136 places, 144 transitions, 320 flow [2023-01-27 17:56:19,024 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 136 places, 144 transitions, 320 flow [2023-01-27 17:56:19,053 INFO L130 PetriNetUnfolder]: 21/190 cut-off events. [2023-01-27 17:56:19,054 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-01-27 17:56:19,054 INFO L83 FinitePrefix]: Finished finitePrefix Result has 213 conditions, 190 events. 21/190 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 475 event pairs, 0 based on Foata normal form. 0/160 useless extension candidates. Maximal degree in co-relation 156. Up to 10 conditions per place. [2023-01-27 17:56:19,061 INFO L119 LiptonReduction]: Number of co-enabled transitions 13456 [2023-01-27 17:56:22,255 INFO L134 LiptonReduction]: Checked pairs total: 12143 [2023-01-27 17:56:22,255 INFO L136 LiptonReduction]: Total number of compositions: 156 [2023-01-27 17:56:22,257 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-27 17:56:22,264 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;@25fc035e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-27 17:56:22,264 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-01-27 17:56:22,266 INFO L130 PetriNetUnfolder]: 0/6 cut-off events. [2023-01-27 17:56:22,266 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-27 17:56:22,266 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 17:56:22,266 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-01-27 17:56:22,266 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-01-27 17:56:22,267 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 17:56:22,267 INFO L85 PathProgramCache]: Analyzing trace with hash 32740208, now seen corresponding path program 1 times [2023-01-27 17:56:22,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 17:56:22,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643879082] [2023-01-27 17:56:22,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 17:56:22,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 17:56:22,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 17:56:22,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 17:56:22,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 17:56:22,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643879082] [2023-01-27 17:56:22,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643879082] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 17:56:22,302 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 17:56:22,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-01-27 17:56:22,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084456100] [2023-01-27 17:56:22,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 17:56:22,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-01-27 17:56:22,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 17:56:22,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-01-27 17:56:22,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-01-27 17:56:22,304 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 300 [2023-01-27 17:56:22,305 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 22 transitions, 76 flow. Second operand has 2 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) [2023-01-27 17:56:22,305 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 17:56:22,305 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 300 [2023-01-27 17:56:22,305 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 17:56:22,413 INFO L130 PetriNetUnfolder]: 488/837 cut-off events. [2023-01-27 17:56:22,414 INFO L131 PetriNetUnfolder]: For 448/448 co-relation queries the response was YES. [2023-01-27 17:56:22,415 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1863 conditions, 837 events. 488/837 cut-off events. For 448/448 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 3901 event pairs, 488 based on Foata normal form. 0/797 useless extension candidates. Maximal degree in co-relation 511. Up to 731 conditions per place. [2023-01-27 17:56:22,418 INFO L137 encePairwiseOnDemand]: 295/300 looper letters, 14 selfloop transitions, 0 changer transitions 0/17 dead transitions. [2023-01-27 17:56:22,418 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 17 transitions, 94 flow [2023-01-27 17:56:22,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-01-27 17:56:22,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-01-27 17:56:22,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 263 transitions. [2023-01-27 17:56:22,424 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43833333333333335 [2023-01-27 17:56:22,424 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 263 transitions. [2023-01-27 17:56:22,425 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 263 transitions. [2023-01-27 17:56:22,425 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 17:56:22,425 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 263 transitions. [2023-01-27 17:56:22,427 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 131.5) internal successors, (263), 2 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:56:22,429 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 300.0) internal successors, (900), 3 states have internal predecessors, (900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:56:22,429 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 300.0) internal successors, (900), 3 states have internal predecessors, (900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:56:22,431 INFO L175 Difference]: Start difference. First operand has 31 places, 22 transitions, 76 flow. Second operand 2 states and 263 transitions. [2023-01-27 17:56:22,436 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 17 transitions, 94 flow [2023-01-27 17:56:22,438 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 17 transitions, 82 flow, removed 6 selfloop flow, removed 0 redundant places. [2023-01-27 17:56:22,439 INFO L231 Difference]: Finished difference. Result has 27 places, 17 transitions, 54 flow [2023-01-27 17:56:22,439 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=300, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=54, PETRI_PLACES=27, PETRI_TRANSITIONS=17} [2023-01-27 17:56:22,441 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, -4 predicate places. [2023-01-27 17:56:22,441 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 17 transitions, 54 flow [2023-01-27 17:56:22,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 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) [2023-01-27 17:56:22,442 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 17:56:22,442 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2023-01-27 17:56:22,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-01-27 17:56:22,443 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-01-27 17:56:22,445 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 17:56:22,445 INFO L85 PathProgramCache]: Analyzing trace with hash 1365754883, now seen corresponding path program 1 times [2023-01-27 17:56:22,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 17:56:22,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173027576] [2023-01-27 17:56:22,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 17:56:22,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 17:56:22,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 17:56:22,461 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-27 17:56:22,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 17:56:22,484 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-27 17:56:22,485 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-27 17:56:22,485 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2023-01-27 17:56:22,485 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2023-01-27 17:56:22,485 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2023-01-27 17:56:22,485 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2023-01-27 17:56:22,485 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2023-01-27 17:56:22,486 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2023-01-27 17:56:22,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-01-27 17:56:22,486 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-01-27 17:56:22,486 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-27 17:56:22,486 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-01-27 17:56:22,512 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-01-27 17:56:22,517 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 164 places, 174 transitions, 393 flow [2023-01-27 17:56:22,578 INFO L130 PetriNetUnfolder]: 26/232 cut-off events. [2023-01-27 17:56:22,579 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-01-27 17:56:22,580 INFO L83 FinitePrefix]: Finished finitePrefix Result has 263 conditions, 232 events. 26/232 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 625 event pairs, 0 based on Foata normal form. 0/195 useless extension candidates. Maximal degree in co-relation 204. Up to 12 conditions per place. [2023-01-27 17:56:22,580 INFO L82 GeneralOperation]: Start removeDead. Operand has 164 places, 174 transitions, 393 flow [2023-01-27 17:56:22,582 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 164 places, 174 transitions, 393 flow [2023-01-27 17:56:22,582 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-27 17:56:22,582 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 164 places, 174 transitions, 393 flow [2023-01-27 17:56:22,583 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 164 places, 174 transitions, 393 flow [2023-01-27 17:56:22,583 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 164 places, 174 transitions, 393 flow [2023-01-27 17:56:22,610 INFO L130 PetriNetUnfolder]: 26/232 cut-off events. [2023-01-27 17:56:22,610 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-01-27 17:56:22,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 263 conditions, 232 events. 26/232 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 625 event pairs, 0 based on Foata normal form. 0/195 useless extension candidates. Maximal degree in co-relation 204. Up to 12 conditions per place. [2023-01-27 17:56:22,624 INFO L119 LiptonReduction]: Number of co-enabled transitions 21170 [2023-01-27 17:56:26,634 INFO L134 LiptonReduction]: Checked pairs total: 21309 [2023-01-27 17:56:26,634 INFO L136 LiptonReduction]: Total number of compositions: 195 [2023-01-27 17:56:26,637 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-27 17:56:26,639 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;@25fc035e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-27 17:56:26,639 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-01-27 17:56:26,640 INFO L130 PetriNetUnfolder]: 0/6 cut-off events. [2023-01-27 17:56:26,640 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-27 17:56:26,640 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 17:56:26,640 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-01-27 17:56:26,640 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-01-27 17:56:26,640 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 17:56:26,641 INFO L85 PathProgramCache]: Analyzing trace with hash 44772881, now seen corresponding path program 1 times [2023-01-27 17:56:26,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 17:56:26,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686642596] [2023-01-27 17:56:26,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 17:56:26,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 17:56:26,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 17:56:26,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 17:56:26,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 17:56:26,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686642596] [2023-01-27 17:56:26,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686642596] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 17:56:26,669 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 17:56:26,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-01-27 17:56:26,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609662716] [2023-01-27 17:56:26,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 17:56:26,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-01-27 17:56:26,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 17:56:26,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-01-27 17:56:26,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-01-27 17:56:26,677 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 369 [2023-01-27 17:56:26,678 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 28 transitions, 101 flow. Second operand has 2 states, 2 states have (on average 149.0) internal successors, (298), 2 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:56:26,678 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 17:56:26,678 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 369 [2023-01-27 17:56:26,678 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 17:56:27,045 INFO L130 PetriNetUnfolder]: 1946/2997 cut-off events. [2023-01-27 17:56:27,046 INFO L131 PetriNetUnfolder]: For 2176/2176 co-relation queries the response was YES. [2023-01-27 17:56:27,050 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6751 conditions, 2997 events. 1946/2997 cut-off events. For 2176/2176 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 15433 event pairs, 1946 based on Foata normal form. 0/2876 useless extension candidates. Maximal degree in co-relation 1924. Up to 2675 conditions per place. [2023-01-27 17:56:27,062 INFO L137 encePairwiseOnDemand]: 362/369 looper letters, 17 selfloop transitions, 0 changer transitions 0/20 dead transitions. [2023-01-27 17:56:27,062 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 20 transitions, 119 flow [2023-01-27 17:56:27,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-01-27 17:56:27,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-01-27 17:56:27,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 318 transitions. [2023-01-27 17:56:27,064 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43089430894308944 [2023-01-27 17:56:27,064 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 318 transitions. [2023-01-27 17:56:27,064 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 318 transitions. [2023-01-27 17:56:27,064 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 17:56:27,064 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 318 transitions. [2023-01-27 17:56:27,065 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 159.0) internal successors, (318), 2 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:56:27,067 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 369.0) internal successors, (1107), 3 states have internal predecessors, (1107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:56:27,068 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 369.0) internal successors, (1107), 3 states have internal predecessors, (1107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:56:27,068 INFO L175 Difference]: Start difference. First operand has 38 places, 28 transitions, 101 flow. Second operand 2 states and 318 transitions. [2023-01-27 17:56:27,068 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 20 transitions, 119 flow [2023-01-27 17:56:27,072 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 20 transitions, 99 flow, removed 10 selfloop flow, removed 0 redundant places. [2023-01-27 17:56:27,073 INFO L231 Difference]: Finished difference. Result has 32 places, 20 transitions, 65 flow [2023-01-27 17:56:27,073 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=369, PETRI_DIFFERENCE_MINUEND_FLOW=65, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=65, PETRI_PLACES=32, PETRI_TRANSITIONS=20} [2023-01-27 17:56:27,075 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -6 predicate places. [2023-01-27 17:56:27,075 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 20 transitions, 65 flow [2023-01-27 17:56:27,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 149.0) internal successors, (298), 2 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:56:27,075 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 17:56:27,075 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 17:56:27,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-01-27 17:56:27,075 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-01-27 17:56:27,076 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 17:56:27,076 INFO L85 PathProgramCache]: Analyzing trace with hash -510641466, now seen corresponding path program 1 times [2023-01-27 17:56:27,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 17:56:27,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048831300] [2023-01-27 17:56:27,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 17:56:27,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 17:56:27,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 17:56:27,099 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-27 17:56:27,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 17:56:27,127 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-27 17:56:27,127 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-27 17:56:27,128 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2023-01-27 17:56:27,128 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 7 remaining) [2023-01-27 17:56:27,128 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 7 remaining) [2023-01-27 17:56:27,128 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 7 remaining) [2023-01-27 17:56:27,128 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 7 remaining) [2023-01-27 17:56:27,129 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 7 remaining) [2023-01-27 17:56:27,131 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 7 remaining) [2023-01-27 17:56:27,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-01-27 17:56:27,132 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-01-27 17:56:27,133 WARN L233 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-27 17:56:27,133 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2023-01-27 17:56:27,156 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-01-27 17:56:27,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 192 places, 204 transitions, 468 flow [2023-01-27 17:56:27,190 INFO L130 PetriNetUnfolder]: 31/274 cut-off events. [2023-01-27 17:56:27,190 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2023-01-27 17:56:27,192 INFO L83 FinitePrefix]: Finished finitePrefix Result has 314 conditions, 274 events. 31/274 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 749 event pairs, 0 based on Foata normal form. 0/230 useless extension candidates. Maximal degree in co-relation 254. Up to 14 conditions per place. [2023-01-27 17:56:27,193 INFO L82 GeneralOperation]: Start removeDead. Operand has 192 places, 204 transitions, 468 flow [2023-01-27 17:56:27,195 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 192 places, 204 transitions, 468 flow [2023-01-27 17:56:27,195 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-27 17:56:27,195 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 192 places, 204 transitions, 468 flow [2023-01-27 17:56:27,195 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 192 places, 204 transitions, 468 flow [2023-01-27 17:56:27,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 192 places, 204 transitions, 468 flow [2023-01-27 17:56:27,226 INFO L130 PetriNetUnfolder]: 31/274 cut-off events. [2023-01-27 17:56:27,226 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2023-01-27 17:56:27,228 INFO L83 FinitePrefix]: Finished finitePrefix Result has 314 conditions, 274 events. 31/274 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 749 event pairs, 0 based on Foata normal form. 0/230 useless extension candidates. Maximal degree in co-relation 254. Up to 14 conditions per place. [2023-01-27 17:56:27,235 INFO L119 LiptonReduction]: Number of co-enabled transitions 30624 [2023-01-27 17:56:31,493 INFO L134 LiptonReduction]: Checked pairs total: 28756 [2023-01-27 17:56:31,493 INFO L136 LiptonReduction]: Total number of compositions: 221 [2023-01-27 17:56:31,495 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-27 17:56:31,495 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;@25fc035e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-27 17:56:31,495 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2023-01-27 17:56:31,496 INFO L130 PetriNetUnfolder]: 0/6 cut-off events. [2023-01-27 17:56:31,496 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-27 17:56:31,496 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 17:56:31,496 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-01-27 17:56:31,497 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2023-01-27 17:56:31,497 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 17:56:31,497 INFO L85 PathProgramCache]: Analyzing trace with hash 58971922, now seen corresponding path program 1 times [2023-01-27 17:56:31,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 17:56:31,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370285170] [2023-01-27 17:56:31,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 17:56:31,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 17:56:31,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 17:56:31,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 17:56:31,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 17:56:31,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370285170] [2023-01-27 17:56:31,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370285170] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 17:56:31,507 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 17:56:31,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-01-27 17:56:31,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106212012] [2023-01-27 17:56:31,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 17:56:31,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-01-27 17:56:31,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 17:56:31,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-01-27 17:56:31,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-01-27 17:56:31,509 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 425 [2023-01-27 17:56:31,509 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 36 transitions, 132 flow. Second operand has 2 states, 2 states have (on average 174.0) internal successors, (348), 2 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:56:31,509 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 17:56:31,509 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 425 [2023-01-27 17:56:31,509 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 17:56:32,652 INFO L130 PetriNetUnfolder]: 7292/10449 cut-off events. [2023-01-27 17:56:32,652 INFO L131 PetriNetUnfolder]: For 9628/9628 co-relation queries the response was YES. [2023-01-27 17:56:32,669 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23762 conditions, 10449 events. 7292/10449 cut-off events. For 9628/9628 co-relation queries the response was YES. Maximal size of possible extension queue 499. Compared 57298 event pairs, 7292 based on Foata normal form. 0/10085 useless extension candidates. Maximal degree in co-relation 6946. Up to 9479 conditions per place. [2023-01-27 17:56:32,716 INFO L137 encePairwiseOnDemand]: 415/425 looper letters, 20 selfloop transitions, 0 changer transitions 0/23 dead transitions. [2023-01-27 17:56:32,716 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 23 transitions, 146 flow [2023-01-27 17:56:32,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-01-27 17:56:32,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-01-27 17:56:32,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 374 transitions. [2023-01-27 17:56:32,718 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44 [2023-01-27 17:56:32,718 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 374 transitions. [2023-01-27 17:56:32,718 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 374 transitions. [2023-01-27 17:56:32,718 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 17:56:32,718 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 374 transitions. [2023-01-27 17:56:32,719 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 187.0) internal successors, (374), 2 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:56:32,721 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 425.0) internal successors, (1275), 3 states have internal predecessors, (1275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:56:32,721 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 425.0) internal successors, (1275), 3 states have internal predecessors, (1275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:56:32,721 INFO L175 Difference]: Start difference. First operand has 46 places, 36 transitions, 132 flow. Second operand 2 states and 374 transitions. [2023-01-27 17:56:32,721 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 23 transitions, 146 flow [2023-01-27 17:56:32,729 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 23 transitions, 116 flow, removed 15 selfloop flow, removed 0 redundant places. [2023-01-27 17:56:32,729 INFO L231 Difference]: Finished difference. Result has 37 places, 23 transitions, 76 flow [2023-01-27 17:56:32,729 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=425, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=76, PETRI_PLACES=37, PETRI_TRANSITIONS=23} [2023-01-27 17:56:32,731 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, -9 predicate places. [2023-01-27 17:56:32,731 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 23 transitions, 76 flow [2023-01-27 17:56:32,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 174.0) internal successors, (348), 2 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:56:32,732 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 17:56:32,732 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 17:56:32,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-01-27 17:56:32,732 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2023-01-27 17:56:32,732 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 17:56:32,732 INFO L85 PathProgramCache]: Analyzing trace with hash 304781237, now seen corresponding path program 1 times [2023-01-27 17:56:32,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 17:56:32,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011192693] [2023-01-27 17:56:32,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 17:56:32,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 17:56:32,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 17:56:32,750 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-27 17:56:32,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 17:56:32,770 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-27 17:56:32,770 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-27 17:56:32,770 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (7 of 8 remaining) [2023-01-27 17:56:32,771 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (6 of 8 remaining) [2023-01-27 17:56:32,771 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 8 remaining) [2023-01-27 17:56:32,771 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 8 remaining) [2023-01-27 17:56:32,771 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 8 remaining) [2023-01-27 17:56:32,771 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 8 remaining) [2023-01-27 17:56:32,771 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 8 remaining) [2023-01-27 17:56:32,772 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 8 remaining) [2023-01-27 17:56:32,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-01-27 17:56:32,772 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-01-27 17:56:32,773 WARN L233 ceAbstractionStarter]: 6 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-27 17:56:32,773 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 7 thread instances. [2023-01-27 17:56:32,797 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-01-27 17:56:32,799 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 220 places, 234 transitions, 545 flow [2023-01-27 17:56:32,833 INFO L130 PetriNetUnfolder]: 36/316 cut-off events. [2023-01-27 17:56:32,833 INFO L131 PetriNetUnfolder]: For 77/77 co-relation queries the response was YES. [2023-01-27 17:56:32,836 INFO L83 FinitePrefix]: Finished finitePrefix Result has 366 conditions, 316 events. 36/316 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 916 event pairs, 0 based on Foata normal form. 0/265 useless extension candidates. Maximal degree in co-relation 305. Up to 16 conditions per place. [2023-01-27 17:56:32,836 INFO L82 GeneralOperation]: Start removeDead. Operand has 220 places, 234 transitions, 545 flow [2023-01-27 17:56:32,838 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 220 places, 234 transitions, 545 flow [2023-01-27 17:56:32,838 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-27 17:56:32,838 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 220 places, 234 transitions, 545 flow [2023-01-27 17:56:32,838 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 220 places, 234 transitions, 545 flow [2023-01-27 17:56:32,838 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 220 places, 234 transitions, 545 flow [2023-01-27 17:56:32,872 INFO L130 PetriNetUnfolder]: 36/316 cut-off events. [2023-01-27 17:56:32,873 INFO L131 PetriNetUnfolder]: For 77/77 co-relation queries the response was YES. [2023-01-27 17:56:32,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 366 conditions, 316 events. 36/316 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 916 event pairs, 0 based on Foata normal form. 0/265 useless extension candidates. Maximal degree in co-relation 305. Up to 16 conditions per place. [2023-01-27 17:56:32,885 INFO L119 LiptonReduction]: Number of co-enabled transitions 41818 [2023-01-27 17:56:38,559 INFO L134 LiptonReduction]: Checked pairs total: 41157 [2023-01-27 17:56:38,559 INFO L136 LiptonReduction]: Total number of compositions: 265 [2023-01-27 17:56:38,560 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-27 17:56:38,561 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;@25fc035e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-27 17:56:38,561 INFO L358 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2023-01-27 17:56:38,562 INFO L130 PetriNetUnfolder]: 0/6 cut-off events. [2023-01-27 17:56:38,562 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-27 17:56:38,562 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 17:56:38,562 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-01-27 17:56:38,562 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 6 more)] === [2023-01-27 17:56:38,562 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 17:56:38,562 INFO L85 PathProgramCache]: Analyzing trace with hash 74922768, now seen corresponding path program 1 times [2023-01-27 17:56:38,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 17:56:38,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346610186] [2023-01-27 17:56:38,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 17:56:38,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 17:56:38,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 17:56:38,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 17:56:38,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 17:56:38,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346610186] [2023-01-27 17:56:38,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346610186] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 17:56:38,585 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 17:56:38,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-01-27 17:56:38,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78529078] [2023-01-27 17:56:38,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 17:56:38,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-01-27 17:56:38,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 17:56:38,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-01-27 17:56:38,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-01-27 17:56:38,586 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 197 out of 499 [2023-01-27 17:56:38,587 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 38 transitions, 153 flow. Second operand has 2 states, 2 states have (on average 199.0) internal successors, (398), 2 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:56:38,587 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 17:56:38,587 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 197 of 499 [2023-01-27 17:56:38,587 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 17:56:42,265 INFO L130 PetriNetUnfolder]: 26246/35721 cut-off events. [2023-01-27 17:56:42,266 INFO L131 PetriNetUnfolder]: For 40003/40003 co-relation queries the response was YES. [2023-01-27 17:56:42,329 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81840 conditions, 35721 events. 26246/35721 cut-off events. For 40003/40003 co-relation queries the response was YES. Maximal size of possible extension queue 1425. Compared 205736 event pairs, 26246 based on Foata normal form. 0/34628 useless extension candidates. Maximal degree in co-relation 24361. Up to 32807 conditions per place. [2023-01-27 17:56:42,474 INFO L137 encePairwiseOnDemand]: 489/499 looper letters, 23 selfloop transitions, 0 changer transitions 0/26 dead transitions. [2023-01-27 17:56:42,474 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 26 transitions, 175 flow [2023-01-27 17:56:42,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-01-27 17:56:42,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-01-27 17:56:42,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 427 transitions. [2023-01-27 17:56:42,476 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4278557114228457 [2023-01-27 17:56:42,476 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 427 transitions. [2023-01-27 17:56:42,476 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 427 transitions. [2023-01-27 17:56:42,476 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 17:56:42,476 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 427 transitions. [2023-01-27 17:56:42,477 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 213.5) internal successors, (427), 2 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:56:42,479 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 499.0) internal successors, (1497), 3 states have internal predecessors, (1497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:56:42,480 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 499.0) internal successors, (1497), 3 states have internal predecessors, (1497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:56:42,480 INFO L175 Difference]: Start difference. First operand has 51 places, 38 transitions, 153 flow. Second operand 2 states and 427 transitions. [2023-01-27 17:56:42,480 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 26 transitions, 175 flow [2023-01-27 17:56:42,527 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 26 transitions, 133 flow, removed 21 selfloop flow, removed 0 redundant places. [2023-01-27 17:56:42,527 INFO L231 Difference]: Finished difference. Result has 42 places, 26 transitions, 87 flow [2023-01-27 17:56:42,528 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=499, PETRI_DIFFERENCE_MINUEND_FLOW=87, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=87, PETRI_PLACES=42, PETRI_TRANSITIONS=26} [2023-01-27 17:56:42,529 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, -9 predicate places. [2023-01-27 17:56:42,529 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 26 transitions, 87 flow [2023-01-27 17:56:42,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 199.0) internal successors, (398), 2 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:56:42,529 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 17:56:42,530 INFO L208 CegarLoopForPetriNet]: trace histogram [8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 17:56:42,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-01-27 17:56:42,530 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 6 more)] === [2023-01-27 17:56:42,530 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 17:56:42,530 INFO L85 PathProgramCache]: Analyzing trace with hash -282970458, now seen corresponding path program 1 times [2023-01-27 17:56:42,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 17:56:42,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412469054] [2023-01-27 17:56:42,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 17:56:42,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 17:56:42,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 17:56:42,555 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-27 17:56:42,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 17:56:42,572 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-27 17:56:42,572 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-27 17:56:42,572 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (8 of 9 remaining) [2023-01-27 17:56:42,572 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (7 of 9 remaining) [2023-01-27 17:56:42,572 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (6 of 9 remaining) [2023-01-27 17:56:42,572 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 9 remaining) [2023-01-27 17:56:42,573 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 9 remaining) [2023-01-27 17:56:42,573 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 9 remaining) [2023-01-27 17:56:42,573 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 9 remaining) [2023-01-27 17:56:42,573 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 9 remaining) [2023-01-27 17:56:42,573 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 9 remaining) [2023-01-27 17:56:42,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-01-27 17:56:42,573 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-01-27 17:56:42,574 WARN L233 ceAbstractionStarter]: 7 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-27 17:56:42,574 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 8 thread instances. [2023-01-27 17:56:42,601 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-01-27 17:56:42,604 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 248 places, 264 transitions, 624 flow [2023-01-27 17:56:42,646 INFO L130 PetriNetUnfolder]: 41/358 cut-off events. [2023-01-27 17:56:42,646 INFO L131 PetriNetUnfolder]: For 112/112 co-relation queries the response was YES. [2023-01-27 17:56:42,652 INFO L83 FinitePrefix]: Finished finitePrefix Result has 419 conditions, 358 events. 41/358 cut-off events. For 112/112 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 1066 event pairs, 0 based on Foata normal form. 0/300 useless extension candidates. Maximal degree in co-relation 357. Up to 18 conditions per place. [2023-01-27 17:56:42,652 INFO L82 GeneralOperation]: Start removeDead. Operand has 248 places, 264 transitions, 624 flow [2023-01-27 17:56:42,655 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 248 places, 264 transitions, 624 flow [2023-01-27 17:56:42,655 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-27 17:56:42,655 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 248 places, 264 transitions, 624 flow [2023-01-27 17:56:42,656 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 248 places, 264 transitions, 624 flow [2023-01-27 17:56:42,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 248 places, 264 transitions, 624 flow [2023-01-27 17:56:42,700 INFO L130 PetriNetUnfolder]: 41/358 cut-off events. [2023-01-27 17:56:42,700 INFO L131 PetriNetUnfolder]: For 112/112 co-relation queries the response was YES. [2023-01-27 17:56:42,705 INFO L83 FinitePrefix]: Finished finitePrefix Result has 419 conditions, 358 events. 41/358 cut-off events. For 112/112 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 1066 event pairs, 0 based on Foata normal form. 0/300 useless extension candidates. Maximal degree in co-relation 357. Up to 18 conditions per place. [2023-01-27 17:56:42,720 INFO L119 LiptonReduction]: Number of co-enabled transitions 54752 [2023-01-27 17:56:48,484 INFO L134 LiptonReduction]: Checked pairs total: 55579 [2023-01-27 17:56:48,484 INFO L136 LiptonReduction]: Total number of compositions: 297 [2023-01-27 17:56:48,485 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-27 17:56:48,486 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;@25fc035e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-27 17:56:48,486 INFO L358 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2023-01-27 17:56:48,486 INFO L130 PetriNetUnfolder]: 1/8 cut-off events. [2023-01-27 17:56:48,487 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-27 17:56:48,487 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 17:56:48,487 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-01-27 17:56:48,487 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2023-01-27 17:56:48,487 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 17:56:48,487 INFO L85 PathProgramCache]: Analyzing trace with hash 92945950, now seen corresponding path program 1 times [2023-01-27 17:56:48,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 17:56:48,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619065238] [2023-01-27 17:56:48,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 17:56:48,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 17:56:48,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 17:56:48,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 17:56:48,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 17:56:48,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619065238] [2023-01-27 17:56:48,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619065238] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 17:56:48,500 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 17:56:48,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-01-27 17:56:48,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915834715] [2023-01-27 17:56:48,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 17:56:48,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-01-27 17:56:48,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 17:56:48,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-01-27 17:56:48,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-01-27 17:56:48,501 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 222 out of 561 [2023-01-27 17:56:48,502 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 42 transitions, 180 flow. Second operand has 2 states, 2 states have (on average 224.0) internal successors, (448), 2 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:56:48,502 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 17:56:48,502 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 222 of 561 [2023-01-27 17:56:48,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 17:56:59,297 INFO L130 PetriNetUnfolder]: 91856/120285 cut-off events. [2023-01-27 17:56:59,298 INFO L131 PetriNetUnfolder]: For 158830/158830 co-relation queries the response was YES. [2023-01-27 17:56:59,536 INFO L83 FinitePrefix]: Finished finitePrefix Result has 277213 conditions, 120285 events. 91856/120285 cut-off events. For 158830/158830 co-relation queries the response was YES. Maximal size of possible extension queue 4108. Compared 716509 event pairs, 91856 based on Foata normal form. 0/117005 useless extension candidates. Maximal degree in co-relation 83653. Up to 111539 conditions per place. [2023-01-27 17:57:00,030 INFO L137 encePairwiseOnDemand]: 550/561 looper letters, 26 selfloop transitions, 0 changer transitions 0/29 dead transitions. [2023-01-27 17:57:00,031 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 29 transitions, 206 flow [2023-01-27 17:57:00,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-01-27 17:57:00,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-01-27 17:57:00,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 481 transitions. [2023-01-27 17:57:00,032 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.428698752228164 [2023-01-27 17:57:00,033 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 481 transitions. [2023-01-27 17:57:00,033 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 481 transitions. [2023-01-27 17:57:00,033 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 17:57:00,033 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 481 transitions. [2023-01-27 17:57:00,034 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 240.5) internal successors, (481), 2 states have internal predecessors, (481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:57:00,037 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 561.0) internal successors, (1683), 3 states have internal predecessors, (1683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:57:00,038 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 561.0) internal successors, (1683), 3 states have internal predecessors, (1683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:57:00,038 INFO L175 Difference]: Start difference. First operand has 57 places, 42 transitions, 180 flow. Second operand 2 states and 481 transitions. [2023-01-27 17:57:00,038 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 29 transitions, 206 flow [2023-01-27 17:57:00,332 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 29 transitions, 150 flow, removed 28 selfloop flow, removed 0 redundant places. [2023-01-27 17:57:00,333 INFO L231 Difference]: Finished difference. Result has 47 places, 29 transitions, 98 flow [2023-01-27 17:57:00,333 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=561, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=98, PETRI_PLACES=47, PETRI_TRANSITIONS=29} [2023-01-27 17:57:00,333 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -10 predicate places. [2023-01-27 17:57:00,334 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 29 transitions, 98 flow [2023-01-27 17:57:00,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 224.0) internal successors, (448), 2 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:57:00,334 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 17:57:00,334 INFO L208 CegarLoopForPetriNet]: trace histogram [9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 17:57:00,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-01-27 17:57:00,334 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2023-01-27 17:57:00,335 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 17:57:00,335 INFO L85 PathProgramCache]: Analyzing trace with hash -1099616246, now seen corresponding path program 1 times [2023-01-27 17:57:00,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 17:57:00,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44744296] [2023-01-27 17:57:00,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 17:57:00,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 17:57:00,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 17:57:00,356 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-27 17:57:00,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 17:57:00,373 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-27 17:57:00,375 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-27 17:57:00,375 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (9 of 10 remaining) [2023-01-27 17:57:00,375 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (8 of 10 remaining) [2023-01-27 17:57:00,375 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (7 of 10 remaining) [2023-01-27 17:57:00,376 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (6 of 10 remaining) [2023-01-27 17:57:00,376 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 10 remaining) [2023-01-27 17:57:00,376 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 10 remaining) [2023-01-27 17:57:00,376 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 10 remaining) [2023-01-27 17:57:00,376 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 10 remaining) [2023-01-27 17:57:00,376 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 10 remaining) [2023-01-27 17:57:00,376 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 10 remaining) [2023-01-27 17:57:00,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-01-27 17:57:00,376 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-01-27 17:57:00,379 WARN L233 ceAbstractionStarter]: 8 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-27 17:57:00,380 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 9 thread instances. [2023-01-27 17:57:00,410 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-01-27 17:57:00,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 276 places, 294 transitions, 705 flow [2023-01-27 17:57:00,462 INFO L130 PetriNetUnfolder]: 46/400 cut-off events. [2023-01-27 17:57:00,463 INFO L131 PetriNetUnfolder]: For 156/156 co-relation queries the response was YES. [2023-01-27 17:57:00,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 473 conditions, 400 events. 46/400 cut-off events. For 156/156 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 1216 event pairs, 0 based on Foata normal form. 0/335 useless extension candidates. Maximal degree in co-relation 410. Up to 20 conditions per place. [2023-01-27 17:57:00,467 INFO L82 GeneralOperation]: Start removeDead. Operand has 276 places, 294 transitions, 705 flow [2023-01-27 17:57:00,470 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 276 places, 294 transitions, 705 flow [2023-01-27 17:57:00,470 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-27 17:57:00,470 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 276 places, 294 transitions, 705 flow [2023-01-27 17:57:00,471 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 276 places, 294 transitions, 705 flow [2023-01-27 17:57:00,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 276 places, 294 transitions, 705 flow [2023-01-27 17:57:00,523 INFO L130 PetriNetUnfolder]: 46/400 cut-off events. [2023-01-27 17:57:00,523 INFO L131 PetriNetUnfolder]: For 156/156 co-relation queries the response was YES. [2023-01-27 17:57:00,529 INFO L83 FinitePrefix]: Finished finitePrefix Result has 473 conditions, 400 events. 46/400 cut-off events. For 156/156 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 1216 event pairs, 0 based on Foata normal form. 0/335 useless extension candidates. Maximal degree in co-relation 410. Up to 20 conditions per place. [2023-01-27 17:57:00,548 INFO L119 LiptonReduction]: Number of co-enabled transitions 69426 [2023-01-27 17:57:06,953 INFO L134 LiptonReduction]: Checked pairs total: 68030 [2023-01-27 17:57:06,953 INFO L136 LiptonReduction]: Total number of compositions: 329 [2023-01-27 17:57:06,955 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-27 17:57:06,955 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;@25fc035e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-27 17:57:06,956 INFO L358 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2023-01-27 17:57:06,957 INFO L130 PetriNetUnfolder]: 0/6 cut-off events. [2023-01-27 17:57:06,957 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-27 17:57:06,957 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 17:57:06,957 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-01-27 17:57:06,957 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2023-01-27 17:57:06,957 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 17:57:06,958 INFO L85 PathProgramCache]: Analyzing trace with hash 113036301, now seen corresponding path program 1 times [2023-01-27 17:57:06,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 17:57:06,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750134847] [2023-01-27 17:57:06,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 17:57:06,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 17:57:06,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 17:57:06,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 17:57:06,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 17:57:06,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750134847] [2023-01-27 17:57:06,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750134847] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 17:57:06,970 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 17:57:06,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-01-27 17:57:06,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627240241] [2023-01-27 17:57:06,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 17:57:06,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-01-27 17:57:06,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 17:57:06,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-01-27 17:57:06,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-01-27 17:57:06,972 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 247 out of 623 [2023-01-27 17:57:06,972 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 46 transitions, 209 flow. Second operand has 2 states, 2 states have (on average 249.0) internal successors, (498), 2 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:57:06,973 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 17:57:06,973 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 247 of 623 [2023-01-27 17:57:06,973 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 17:57:45,543 INFO L130 PetriNetUnfolder]: 314930/400221 cut-off events. [2023-01-27 17:57:45,543 INFO L131 PetriNetUnfolder]: For 609352/609352 co-relation queries the response was YES. [2023-01-27 17:57:46,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 926753 conditions, 400221 events. 314930/400221 cut-off events. For 609352/609352 co-relation queries the response was YES. Maximal size of possible extension queue 11911. Compared 2455429 event pairs, 314930 based on Foata normal form. 0/390380 useless extension candidates. Maximal degree in co-relation 282670. Up to 373979 conditions per place. [2023-01-27 17:57:47,857 INFO L137 encePairwiseOnDemand]: 611/623 looper letters, 29 selfloop transitions, 0 changer transitions 0/32 dead transitions. [2023-01-27 17:57:47,857 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 32 transitions, 239 flow [2023-01-27 17:57:47,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-01-27 17:57:47,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-01-27 17:57:47,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 535 transitions. [2023-01-27 17:57:47,859 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42937399678972715 [2023-01-27 17:57:47,859 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 535 transitions. [2023-01-27 17:57:47,859 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 535 transitions. [2023-01-27 17:57:47,859 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 17:57:47,859 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 535 transitions. [2023-01-27 17:57:47,861 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 267.5) internal successors, (535), 2 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:57:47,862 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 623.0) internal successors, (1869), 3 states have internal predecessors, (1869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:57:47,863 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 623.0) internal successors, (1869), 3 states have internal predecessors, (1869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:57:47,863 INFO L175 Difference]: Start difference. First operand has 63 places, 46 transitions, 209 flow. Second operand 2 states and 535 transitions. [2023-01-27 17:57:47,863 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 32 transitions, 239 flow [2023-01-27 17:57:48,776 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 32 transitions, 167 flow, removed 36 selfloop flow, removed 0 redundant places. [2023-01-27 17:57:48,777 INFO L231 Difference]: Finished difference. Result has 52 places, 32 transitions, 109 flow [2023-01-27 17:57:48,777 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=623, PETRI_DIFFERENCE_MINUEND_FLOW=109, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=109, PETRI_PLACES=52, PETRI_TRANSITIONS=32} [2023-01-27 17:57:48,777 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, -11 predicate places. [2023-01-27 17:57:48,777 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 32 transitions, 109 flow [2023-01-27 17:57:48,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 249.0) internal successors, (498), 2 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:57:48,778 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 17:57:48,778 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 17:57:48,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-01-27 17:57:48,778 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2023-01-27 17:57:48,778 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 17:57:48,778 INFO L85 PathProgramCache]: Analyzing trace with hash 2089114799, now seen corresponding path program 1 times [2023-01-27 17:57:48,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 17:57:48,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137879010] [2023-01-27 17:57:48,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 17:57:48,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 17:57:48,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 17:57:48,793 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-27 17:57:48,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 17:57:48,805 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-27 17:57:48,805 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-27 17:57:48,806 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (10 of 11 remaining) [2023-01-27 17:57:48,806 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (9 of 11 remaining) [2023-01-27 17:57:48,806 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (8 of 11 remaining) [2023-01-27 17:57:48,806 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (7 of 11 remaining) [2023-01-27 17:57:48,806 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (6 of 11 remaining) [2023-01-27 17:57:48,806 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 11 remaining) [2023-01-27 17:57:48,806 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 11 remaining) [2023-01-27 17:57:48,806 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 11 remaining) [2023-01-27 17:57:48,807 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 11 remaining) [2023-01-27 17:57:48,807 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 11 remaining) [2023-01-27 17:57:48,807 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 11 remaining) [2023-01-27 17:57:48,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-01-27 17:57:48,807 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-01-27 17:57:48,807 WARN L233 ceAbstractionStarter]: 9 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-27 17:57:48,807 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 10 thread instances. [2023-01-27 17:57:48,841 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-01-27 17:57:48,844 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 304 places, 324 transitions, 788 flow [2023-01-27 17:57:48,898 INFO L130 PetriNetUnfolder]: 51/442 cut-off events. [2023-01-27 17:57:48,899 INFO L131 PetriNetUnfolder]: For 210/210 co-relation queries the response was YES. [2023-01-27 17:57:48,904 INFO L83 FinitePrefix]: Finished finitePrefix Result has 528 conditions, 442 events. 51/442 cut-off events. For 210/210 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 1362 event pairs, 0 based on Foata normal form. 0/370 useless extension candidates. Maximal degree in co-relation 464. Up to 22 conditions per place. [2023-01-27 17:57:48,904 INFO L82 GeneralOperation]: Start removeDead. Operand has 304 places, 324 transitions, 788 flow [2023-01-27 17:57:48,907 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 304 places, 324 transitions, 788 flow [2023-01-27 17:57:48,907 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-27 17:57:48,907 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 304 places, 324 transitions, 788 flow [2023-01-27 17:57:48,907 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 304 places, 324 transitions, 788 flow [2023-01-27 17:57:48,907 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 304 places, 324 transitions, 788 flow [2023-01-27 17:57:48,950 INFO L130 PetriNetUnfolder]: 51/442 cut-off events. [2023-01-27 17:57:48,950 INFO L131 PetriNetUnfolder]: For 210/210 co-relation queries the response was YES. [2023-01-27 17:57:48,955 INFO L83 FinitePrefix]: Finished finitePrefix Result has 528 conditions, 442 events. 51/442 cut-off events. For 210/210 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 1362 event pairs, 0 based on Foata normal form. 0/370 useless extension candidates. Maximal degree in co-relation 464. Up to 22 conditions per place. [2023-01-27 17:57:48,978 INFO L119 LiptonReduction]: Number of co-enabled transitions 85840 [2023-01-27 17:57:55,798 INFO L134 LiptonReduction]: Checked pairs total: 83168 [2023-01-27 17:57:55,799 INFO L136 LiptonReduction]: Total number of compositions: 362 [2023-01-27 17:57:55,800 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-27 17:57:55,800 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;@25fc035e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-27 17:57:55,800 INFO L358 AbstractCegarLoop]: Starting to check reachability of 12 error locations. [2023-01-27 17:57:55,801 INFO L130 PetriNetUnfolder]: 0/6 cut-off events. [2023-01-27 17:57:55,801 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-27 17:57:55,801 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 17:57:55,801 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-01-27 17:57:55,801 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 9 more)] === [2023-01-27 17:57:55,802 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 17:57:55,802 INFO L85 PathProgramCache]: Analyzing trace with hash 135189984, now seen corresponding path program 1 times [2023-01-27 17:57:55,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 17:57:55,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913778636] [2023-01-27 17:57:55,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 17:57:55,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 17:57:55,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 17:57:55,813 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 17:57:55,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 17:57:55,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913778636] [2023-01-27 17:57:55,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913778636] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 17:57:55,814 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 17:57:55,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-01-27 17:57:55,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252700740] [2023-01-27 17:57:55,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 17:57:55,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-01-27 17:57:55,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 17:57:55,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-01-27 17:57:55,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-01-27 17:57:55,815 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 272 out of 686 [2023-01-27 17:57:55,816 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 58 transitions, 256 flow. Second operand has 2 states, 2 states have (on average 274.0) internal successors, (548), 2 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:57:55,816 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 17:57:55,816 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 272 of 686 [2023-01-27 17:57:55,816 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand