/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/48_ticket_lock_low_contention_vs.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-b8dbc81 [2023-01-27 18:02:02,403 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-01-27 18:02:02,408 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-01-27 18:02:02,550 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-01-27 18:02:02,550 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-01-27 18:02:02,553 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-01-27 18:02:02,567 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-01-27 18:02:02,570 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-01-27 18:02:02,577 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-01-27 18:02:02,583 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-01-27 18:02:02,584 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-01-27 18:02:02,586 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-01-27 18:02:02,586 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-01-27 18:02:02,588 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-01-27 18:02:02,589 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-01-27 18:02:02,597 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-01-27 18:02:02,598 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-01-27 18:02:02,598 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-01-27 18:02:02,600 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-01-27 18:02:02,605 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-01-27 18:02:02,606 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-01-27 18:02:02,622 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-01-27 18:02:02,623 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-01-27 18:02:02,624 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-01-27 18:02:02,643 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-01-27 18:02:02,648 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-01-27 18:02:02,649 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-01-27 18:02:02,649 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-01-27 18:02:02,650 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 18:02:02,709 INFO L113 SettingsManager]: Loading preferences was successful [2023-01-27 18:02:02,713 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-01-27 18:02:02,714 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-01-27 18:02:02,714 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-01-27 18:02:02,729 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-01-27 18:02:02,729 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-01-27 18:02:02,729 INFO L138 SettingsManager]: * Use SBE=true [2023-01-27 18:02:02,729 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-01-27 18:02:02,729 INFO L138 SettingsManager]: * sizeof long=4 [2023-01-27 18:02:02,729 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-01-27 18:02:02,729 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-01-27 18:02:02,730 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-01-27 18:02:02,730 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-01-27 18:02:02,730 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-01-27 18:02:02,730 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-01-27 18:02:02,730 INFO L138 SettingsManager]: * sizeof long double=12 [2023-01-27 18:02:02,730 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-01-27 18:02:02,730 INFO L138 SettingsManager]: * Use constant arrays=true [2023-01-27 18:02:02,730 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-01-27 18:02:02,730 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-01-27 18:02:02,731 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-01-27 18:02:02,731 INFO L138 SettingsManager]: * To the following directory=./dump/ [2023-01-27 18:02:02,731 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-01-27 18:02:02,731 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-27 18:02:02,731 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-01-27 18:02:02,731 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-01-27 18:02:02,731 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-01-27 18:02:02,731 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-01-27 18:02:02,731 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-01-27 18:02:02,731 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-01-27 18:02:02,732 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-01-27 18:02:02,732 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-01-27 18:02:03,302 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-01-27 18:02:03,363 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-01-27 18:02:03,367 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-01-27 18:02:03,368 INFO L271 PluginConnector]: Initializing CDTParser... [2023-01-27 18:02:03,371 INFO L275 PluginConnector]: CDTParser initialized [2023-01-27 18:02:03,373 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/48_ticket_lock_low_contention_vs.i [2023-01-27 18:02:05,458 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-01-27 18:02:05,836 INFO L351 CDTParser]: Found 1 translation units. [2023-01-27 18:02:05,836 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/48_ticket_lock_low_contention_vs.i [2023-01-27 18:02:05,852 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cab0172f4/f06688e635094fdabb789739c5e388ba/FLAG84cf1fb61 [2023-01-27 18:02:05,867 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cab0172f4/f06688e635094fdabb789739c5e388ba [2023-01-27 18:02:05,869 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-01-27 18:02:05,871 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2023-01-27 18:02:05,872 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-01-27 18:02:05,872 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-01-27 18:02:05,874 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-01-27 18:02:05,874 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 06:02:05" (1/1) ... [2023-01-27 18:02:05,887 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71cc39d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 06:02:05, skipping insertion in model container [2023-01-27 18:02:05,887 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 06:02:05" (1/1) ... [2023-01-27 18:02:05,899 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-01-27 18:02:05,965 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-01-27 18:02:06,289 WARN L633 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-01-27 18:02:06,567 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/48_ticket_lock_low_contention_vs.i[30893,30906] [2023-01-27 18:02:06,582 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-27 18:02:06,598 INFO L203 MainTranslator]: Completed pre-run [2023-01-27 18:02:06,638 WARN L633 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-01-27 18:02:06,673 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/48_ticket_lock_low_contention_vs.i[30893,30906] [2023-01-27 18:02:06,675 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-27 18:02:06,731 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-01-27 18:02:06,731 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-01-27 18:02:06,731 WARN L667 CHandler]: The function __builtin_bswap16 is called, but not defined or handled by StandardFunctionHandler. [2023-01-27 18:02:06,746 INFO L208 MainTranslator]: Completed translation [2023-01-27 18:02:06,765 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 06:02:06 WrapperNode [2023-01-27 18:02:06,765 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-01-27 18:02:06,766 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-01-27 18:02:06,766 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-01-27 18:02:06,766 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-01-27 18:02:06,771 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 06:02:06" (1/1) ... [2023-01-27 18:02:06,800 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 06:02:06" (1/1) ... [2023-01-27 18:02:06,842 INFO L138 Inliner]: procedures = 173, calls = 24, calls flagged for inlining = 5, calls inlined = 7, statements flattened = 109 [2023-01-27 18:02:06,843 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-01-27 18:02:06,843 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-01-27 18:02:06,843 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-01-27 18:02:06,843 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-01-27 18:02:06,861 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 06:02:06" (1/1) ... [2023-01-27 18:02:06,861 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 06:02:06" (1/1) ... [2023-01-27 18:02:06,876 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 06:02:06" (1/1) ... [2023-01-27 18:02:06,876 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 06:02:06" (1/1) ... [2023-01-27 18:02:06,879 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 06:02:06" (1/1) ... [2023-01-27 18:02:06,888 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 06:02:06" (1/1) ... [2023-01-27 18:02:06,889 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 06:02:06" (1/1) ... [2023-01-27 18:02:06,890 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 06:02:06" (1/1) ... [2023-01-27 18:02:06,892 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-01-27 18:02:06,892 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-01-27 18:02:06,892 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-01-27 18:02:06,892 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-01-27 18:02:06,893 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 06:02:06" (1/1) ... [2023-01-27 18:02:06,907 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-27 18:02:06,926 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 18:02:06,969 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 18:02:06,987 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 18:02:07,047 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-01-27 18:02:07,048 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-01-27 18:02:07,048 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-01-27 18:02:07,053 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-01-27 18:02:07,053 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-01-27 18:02:07,054 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-01-27 18:02:07,055 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-01-27 18:02:07,055 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-01-27 18:02:07,055 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-01-27 18:02:07,055 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-01-27 18:02:07,056 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-01-27 18:02:07,056 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-01-27 18:02:07,058 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 18:02:07,302 INFO L236 CfgBuilder]: Building ICFG [2023-01-27 18:02:07,303 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-01-27 18:02:07,807 INFO L277 CfgBuilder]: Performing block encoding [2023-01-27 18:02:08,005 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-01-27 18:02:08,005 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-01-27 18:02:08,007 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 06:02:08 BoogieIcfgContainer [2023-01-27 18:02:08,007 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-01-27 18:02:08,011 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-01-27 18:02:08,011 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-01-27 18:02:08,015 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-01-27 18:02:08,015 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.01 06:02:05" (1/3) ... [2023-01-27 18:02:08,015 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@102e5667 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 06:02:08, skipping insertion in model container [2023-01-27 18:02:08,015 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 06:02:06" (2/3) ... [2023-01-27 18:02:08,016 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@102e5667 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 06:02:08, skipping insertion in model container [2023-01-27 18:02:08,016 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 06:02:08" (3/3) ... [2023-01-27 18:02:08,017 INFO L112 eAbstractionObserver]: Analyzing ICFG 48_ticket_lock_low_contention_vs.i [2023-01-27 18:02:08,067 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-01-27 18:02:08,067 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-01-27 18:02:08,067 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-01-27 18:02:08,216 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-01-27 18:02:08,308 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 68 places, 70 transitions, 145 flow [2023-01-27 18:02:08,412 INFO L130 PetriNetUnfolder]: 8/106 cut-off events. [2023-01-27 18:02:08,412 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-27 18:02:08,443 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111 conditions, 106 events. 8/106 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 212 event pairs, 0 based on Foata normal form. 0/93 useless extension candidates. Maximal degree in co-relation 55. Up to 4 conditions per place. [2023-01-27 18:02:08,443 INFO L82 GeneralOperation]: Start removeDead. Operand has 68 places, 70 transitions, 145 flow [2023-01-27 18:02:08,455 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 68 places, 70 transitions, 145 flow [2023-01-27 18:02:08,458 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-27 18:02:08,495 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 68 places, 70 transitions, 145 flow [2023-01-27 18:02:08,497 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 68 places, 70 transitions, 145 flow [2023-01-27 18:02:08,498 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 68 places, 70 transitions, 145 flow [2023-01-27 18:02:08,606 INFO L130 PetriNetUnfolder]: 8/106 cut-off events. [2023-01-27 18:02:08,606 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-27 18:02:08,607 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111 conditions, 106 events. 8/106 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 212 event pairs, 0 based on Foata normal form. 0/93 useless extension candidates. Maximal degree in co-relation 55. Up to 4 conditions per place. [2023-01-27 18:02:08,608 INFO L119 LiptonReduction]: Number of co-enabled transitions 1326 [2023-01-27 18:02:12,156 INFO L134 LiptonReduction]: Checked pairs total: 3786 [2023-01-27 18:02:12,157 INFO L136 LiptonReduction]: Total number of compositions: 50 [2023-01-27 18:02:12,181 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-27 18:02:12,200 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;@6898d5f8, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-27 18:02:12,200 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-01-27 18:02:12,205 INFO L130 PetriNetUnfolder]: 3/18 cut-off events. [2023-01-27 18:02:12,205 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-27 18:02:12,206 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 18:02:12,206 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-01-27 18:02:12,207 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-27 18:02:12,224 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 18:02:12,225 INFO L85 PathProgramCache]: Analyzing trace with hash 2028827622, now seen corresponding path program 1 times [2023-01-27 18:02:12,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 18:02:12,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803004513] [2023-01-27 18:02:12,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 18:02:12,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 18:02:12,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 18:02:12,765 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 18:02:12,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 18:02:12,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803004513] [2023-01-27 18:02:12,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803004513] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 18:02:12,766 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 18:02:12,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-27 18:02:12,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939498635] [2023-01-27 18:02:12,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 18:02:12,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 18:02:12,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 18:02:12,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 18:02:12,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 18:02:12,833 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 120 [2023-01-27 18:02:12,835 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 30 transitions, 65 flow. Second operand has 3 states, 3 states have (on average 49.0) internal successors, (147), 3 states have internal predecessors, (147), 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 18:02:12,835 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 18:02:12,835 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 120 [2023-01-27 18:02:12,836 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 18:02:13,044 INFO L130 PetriNetUnfolder]: 125/266 cut-off events. [2023-01-27 18:02:13,044 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-27 18:02:13,046 INFO L83 FinitePrefix]: Finished finitePrefix Result has 537 conditions, 266 events. 125/266 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 904 event pairs, 61 based on Foata normal form. 0/227 useless extension candidates. Maximal degree in co-relation 504. Up to 192 conditions per place. [2023-01-27 18:02:13,049 INFO L137 encePairwiseOnDemand]: 112/120 looper letters, 33 selfloop transitions, 4 changer transitions 9/47 dead transitions. [2023-01-27 18:02:13,049 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 47 transitions, 191 flow [2023-01-27 18:02:13,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 18:02:13,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 18:02:13,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 193 transitions. [2023-01-27 18:02:13,106 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5361111111111111 [2023-01-27 18:02:13,108 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 193 transitions. [2023-01-27 18:02:13,108 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 193 transitions. [2023-01-27 18:02:13,126 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 18:02:13,128 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 193 transitions. [2023-01-27 18:02:13,133 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 64.33333333333333) internal successors, (193), 3 states have internal predecessors, (193), 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 18:02:13,141 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 120.0) internal successors, (480), 4 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:02:13,142 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 120.0) internal successors, (480), 4 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 18:02:13,143 INFO L175 Difference]: Start difference. First operand has 29 places, 30 transitions, 65 flow. Second operand 3 states and 193 transitions. [2023-01-27 18:02:13,144 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 47 transitions, 191 flow [2023-01-27 18:02:13,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 47 transitions, 191 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-01-27 18:02:13,149 INFO L231 Difference]: Finished difference. Result has 31 places, 28 transitions, 85 flow [2023-01-27 18:02:13,151 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=57, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=85, PETRI_PLACES=31, PETRI_TRANSITIONS=28} [2023-01-27 18:02:13,154 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 2 predicate places. [2023-01-27 18:02:13,154 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 28 transitions, 85 flow [2023-01-27 18:02:13,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.0) internal successors, (147), 3 states have internal predecessors, (147), 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 18:02:13,155 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 18:02:13,155 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-01-27 18:02:13,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-01-27 18:02:13,155 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-27 18:02:13,159 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 18:02:13,159 INFO L85 PathProgramCache]: Analyzing trace with hash 2028104312, now seen corresponding path program 1 times [2023-01-27 18:02:13,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 18:02:13,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872028247] [2023-01-27 18:02:13,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 18:02:13,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 18:02:13,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 18:02:13,292 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-27 18:02:13,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 18:02:13,323 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-27 18:02:13,323 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-27 18:02:13,327 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-01-27 18:02:13,329 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-01-27 18:02:13,329 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2023-01-27 18:02:13,329 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2023-01-27 18:02:13,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-01-27 18:02:13,329 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-01-27 18:02:13,331 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-27 18:02:13,331 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-01-27 18:02:13,425 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-01-27 18:02:13,427 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 86 places, 88 transitions, 188 flow [2023-01-27 18:02:13,453 INFO L130 PetriNetUnfolder]: 13/162 cut-off events. [2023-01-27 18:02:13,453 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-27 18:02:13,465 INFO L83 FinitePrefix]: Finished finitePrefix Result has 172 conditions, 162 events. 13/162 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 410 event pairs, 0 based on Foata normal form. 0/141 useless extension candidates. Maximal degree in co-relation 107. Up to 6 conditions per place. [2023-01-27 18:02:13,465 INFO L82 GeneralOperation]: Start removeDead. Operand has 86 places, 88 transitions, 188 flow [2023-01-27 18:02:13,466 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 86 places, 88 transitions, 188 flow [2023-01-27 18:02:13,467 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-27 18:02:13,467 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 86 places, 88 transitions, 188 flow [2023-01-27 18:02:13,467 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 86 places, 88 transitions, 188 flow [2023-01-27 18:02:13,467 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 86 places, 88 transitions, 188 flow [2023-01-27 18:02:13,486 INFO L130 PetriNetUnfolder]: 13/162 cut-off events. [2023-01-27 18:02:13,486 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-27 18:02:13,488 INFO L83 FinitePrefix]: Finished finitePrefix Result has 172 conditions, 162 events. 13/162 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 410 event pairs, 0 based on Foata normal form. 0/141 useless extension candidates. Maximal degree in co-relation 107. Up to 6 conditions per place. [2023-01-27 18:02:13,503 INFO L119 LiptonReduction]: Number of co-enabled transitions 3264 [2023-01-27 18:02:15,080 INFO L134 LiptonReduction]: Checked pairs total: 10424 [2023-01-27 18:02:15,080 INFO L136 LiptonReduction]: Total number of compositions: 57 [2023-01-27 18:02:15,094 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-27 18:02:15,113 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;@6898d5f8, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-27 18:02:15,114 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-01-27 18:02:15,116 INFO L130 PetriNetUnfolder]: 3/19 cut-off events. [2023-01-27 18:02:15,116 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-01-27 18:02:15,116 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 18:02:15,116 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-01-27 18:02:15,116 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-01-27 18:02:15,124 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 18:02:15,125 INFO L85 PathProgramCache]: Analyzing trace with hash -1768402372, now seen corresponding path program 1 times [2023-01-27 18:02:15,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 18:02:15,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489984861] [2023-01-27 18:02:15,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 18:02:15,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 18:02:15,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 18:02:15,304 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 18:02:15,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 18:02:15,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489984861] [2023-01-27 18:02:15,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489984861] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 18:02:15,305 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 18:02:15,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-27 18:02:15,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395226015] [2023-01-27 18:02:15,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 18:02:15,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 18:02:15,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 18:02:15,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 18:02:15,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 18:02:15,307 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 145 [2023-01-27 18:02:15,307 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 44 transitions, 100 flow. Second operand has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 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 18:02:15,307 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 18:02:15,307 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 145 [2023-01-27 18:02:15,307 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 18:02:16,158 INFO L130 PetriNetUnfolder]: 2724/4247 cut-off events. [2023-01-27 18:02:16,158 INFO L131 PetriNetUnfolder]: For 29/29 co-relation queries the response was YES. [2023-01-27 18:02:16,182 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8521 conditions, 4247 events. 2724/4247 cut-off events. For 29/29 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 22292 event pairs, 1275 based on Foata normal form. 0/3586 useless extension candidates. Maximal degree in co-relation 5592. Up to 2808 conditions per place. [2023-01-27 18:02:16,234 INFO L137 encePairwiseOnDemand]: 133/145 looper letters, 59 selfloop transitions, 6 changer transitions 0/68 dead transitions. [2023-01-27 18:02:16,235 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 68 transitions, 283 flow [2023-01-27 18:02:16,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 18:02:16,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 18:02:16,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 236 transitions. [2023-01-27 18:02:16,257 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.542528735632184 [2023-01-27 18:02:16,258 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 236 transitions. [2023-01-27 18:02:16,258 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 236 transitions. [2023-01-27 18:02:16,258 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 18:02:16,258 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 236 transitions. [2023-01-27 18:02:16,260 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 78.66666666666667) internal successors, (236), 3 states have internal predecessors, (236), 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 18:02:16,261 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 145.0) internal successors, (580), 4 states have internal predecessors, (580), 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 18:02:16,262 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 145.0) internal successors, (580), 4 states have internal predecessors, (580), 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 18:02:16,262 INFO L175 Difference]: Start difference. First operand has 43 places, 44 transitions, 100 flow. Second operand 3 states and 236 transitions. [2023-01-27 18:02:16,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 68 transitions, 283 flow [2023-01-27 18:02:16,263 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 68 transitions, 281 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-01-27 18:02:16,264 INFO L231 Difference]: Finished difference. Result has 44 places, 44 transitions, 140 flow [2023-01-27 18:02:16,264 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=140, PETRI_PLACES=44, PETRI_TRANSITIONS=44} [2023-01-27 18:02:16,264 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 1 predicate places. [2023-01-27 18:02:16,265 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 44 transitions, 140 flow [2023-01-27 18:02:16,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 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 18:02:16,265 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 18:02:16,265 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-01-27 18:02:16,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-01-27 18:02:16,265 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-01-27 18:02:16,265 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 18:02:16,266 INFO L85 PathProgramCache]: Analyzing trace with hash -1537516535, now seen corresponding path program 1 times [2023-01-27 18:02:16,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 18:02:16,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277763720] [2023-01-27 18:02:16,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 18:02:16,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 18:02:16,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 18:02:16,310 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-27 18:02:16,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 18:02:16,345 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-27 18:02:16,345 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-27 18:02:16,345 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2023-01-27 18:02:16,346 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2023-01-27 18:02:16,346 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2023-01-27 18:02:16,346 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2023-01-27 18:02:16,348 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2023-01-27 18:02:16,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-01-27 18:02:16,349 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-01-27 18:02:16,349 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-27 18:02:16,349 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-01-27 18:02:16,388 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-01-27 18:02:16,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 104 places, 106 transitions, 233 flow [2023-01-27 18:02:16,416 INFO L130 PetriNetUnfolder]: 18/218 cut-off events. [2023-01-27 18:02:16,416 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-01-27 18:02:16,433 INFO L83 FinitePrefix]: Finished finitePrefix Result has 234 conditions, 218 events. 18/218 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 624 event pairs, 0 based on Foata normal form. 0/189 useless extension candidates. Maximal degree in co-relation 166. Up to 8 conditions per place. [2023-01-27 18:02:16,433 INFO L82 GeneralOperation]: Start removeDead. Operand has 104 places, 106 transitions, 233 flow [2023-01-27 18:02:16,435 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 104 places, 106 transitions, 233 flow [2023-01-27 18:02:16,435 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-27 18:02:16,435 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 104 places, 106 transitions, 233 flow [2023-01-27 18:02:16,435 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 104 places, 106 transitions, 233 flow [2023-01-27 18:02:16,435 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 104 places, 106 transitions, 233 flow [2023-01-27 18:02:16,454 INFO L130 PetriNetUnfolder]: 18/218 cut-off events. [2023-01-27 18:02:16,454 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-01-27 18:02:16,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 234 conditions, 218 events. 18/218 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 624 event pairs, 0 based on Foata normal form. 0/189 useless extension candidates. Maximal degree in co-relation 166. Up to 8 conditions per place. [2023-01-27 18:02:16,459 INFO L119 LiptonReduction]: Number of co-enabled transitions 5814 [2023-01-27 18:02:18,230 INFO L134 LiptonReduction]: Checked pairs total: 18567 [2023-01-27 18:02:18,230 INFO L136 LiptonReduction]: Total number of compositions: 65 [2023-01-27 18:02:18,231 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-27 18:02:18,232 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;@6898d5f8, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-27 18:02:18,232 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-01-27 18:02:18,234 INFO L130 PetriNetUnfolder]: 3/19 cut-off events. [2023-01-27 18:02:18,234 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-01-27 18:02:18,234 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 18:02:18,235 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-01-27 18:02:18,235 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2023-01-27 18:02:18,235 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 18:02:18,235 INFO L85 PathProgramCache]: Analyzing trace with hash -472896841, now seen corresponding path program 1 times [2023-01-27 18:02:18,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 18:02:18,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263526359] [2023-01-27 18:02:18,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 18:02:18,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 18:02:18,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 18:02:18,420 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 18:02:18,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 18:02:18,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263526359] [2023-01-27 18:02:18,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263526359] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 18:02:18,424 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 18:02:18,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-27 18:02:18,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415884227] [2023-01-27 18:02:18,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 18:02:18,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 18:02:18,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 18:02:18,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 18:02:18,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 18:02:18,427 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 171 [2023-01-27 18:02:18,428 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 55 transitions, 131 flow. Second operand has 3 states, 3 states have (on average 63.0) internal successors, (189), 3 states have internal predecessors, (189), 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 18:02:18,428 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 18:02:18,428 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 171 [2023-01-27 18:02:18,428 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 18:02:27,381 INFO L130 PetriNetUnfolder]: 49982/68453 cut-off events. [2023-01-27 18:02:27,381 INFO L131 PetriNetUnfolder]: For 715/715 co-relation queries the response was YES. [2023-01-27 18:02:27,568 INFO L83 FinitePrefix]: Finished finitePrefix Result has 137338 conditions, 68453 events. 49982/68453 cut-off events. For 715/715 co-relation queries the response was YES. Maximal size of possible extension queue 1756. Compared 419030 event pairs, 23288 based on Foata normal form. 1208/58103 useless extension candidates. Maximal degree in co-relation 36668. Up to 43890 conditions per place. [2023-01-27 18:02:28,104 INFO L137 encePairwiseOnDemand]: 155/171 looper letters, 79 selfloop transitions, 8 changer transitions 0/90 dead transitions. [2023-01-27 18:02:28,104 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 90 transitions, 387 flow [2023-01-27 18:02:28,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 18:02:28,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 18:02:28,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 281 transitions. [2023-01-27 18:02:28,110 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5477582846003899 [2023-01-27 18:02:28,110 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 281 transitions. [2023-01-27 18:02:28,110 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 281 transitions. [2023-01-27 18:02:28,110 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 18:02:28,110 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 281 transitions. [2023-01-27 18:02:28,111 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 93.66666666666667) internal successors, (281), 3 states have internal predecessors, (281), 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 18:02:28,112 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 171.0) internal successors, (684), 4 states have internal predecessors, (684), 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 18:02:28,112 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 171.0) internal successors, (684), 4 states have internal predecessors, (684), 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 18:02:28,112 INFO L175 Difference]: Start difference. First operand has 55 places, 55 transitions, 131 flow. Second operand 3 states and 281 transitions. [2023-01-27 18:02:28,112 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 90 transitions, 387 flow [2023-01-27 18:02:28,116 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 90 transitions, 379 flow, removed 4 selfloop flow, removed 0 redundant places. [2023-01-27 18:02:28,117 INFO L231 Difference]: Finished difference. Result has 57 places, 58 transitions, 189 flow [2023-01-27 18:02:28,117 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=115, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=189, PETRI_PLACES=57, PETRI_TRANSITIONS=58} [2023-01-27 18:02:28,118 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 2 predicate places. [2023-01-27 18:02:28,118 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 58 transitions, 189 flow [2023-01-27 18:02:28,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 63.0) internal successors, (189), 3 states have internal predecessors, (189), 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 18:02:28,118 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 18:02:28,118 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-01-27 18:02:28,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-01-27 18:02:28,119 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2023-01-27 18:02:28,119 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 18:02:28,119 INFO L85 PathProgramCache]: Analyzing trace with hash 1245068768, now seen corresponding path program 1 times [2023-01-27 18:02:28,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 18:02:28,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973878377] [2023-01-27 18:02:28,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 18:02:28,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 18:02:28,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 18:02:28,181 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-27 18:02:28,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 18:02:28,218 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-27 18:02:28,218 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-27 18:02:28,218 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2023-01-27 18:02:28,218 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2023-01-27 18:02:28,218 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2023-01-27 18:02:28,218 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2023-01-27 18:02:28,218 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2023-01-27 18:02:28,219 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2023-01-27 18:02:28,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-01-27 18:02:28,219 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-01-27 18:02:28,219 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-27 18:02:28,219 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-01-27 18:02:28,316 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-01-27 18:02:28,329 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 122 places, 124 transitions, 280 flow [2023-01-27 18:02:28,356 INFO L130 PetriNetUnfolder]: 23/274 cut-off events. [2023-01-27 18:02:28,356 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-01-27 18:02:28,358 INFO L83 FinitePrefix]: Finished finitePrefix Result has 297 conditions, 274 events. 23/274 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 822 event pairs, 0 based on Foata normal form. 0/237 useless extension candidates. Maximal degree in co-relation 226. Up to 10 conditions per place. [2023-01-27 18:02:28,358 INFO L82 GeneralOperation]: Start removeDead. Operand has 122 places, 124 transitions, 280 flow [2023-01-27 18:02:28,359 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 122 places, 124 transitions, 280 flow [2023-01-27 18:02:28,360 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-27 18:02:28,360 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 122 places, 124 transitions, 280 flow [2023-01-27 18:02:28,360 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 122 places, 124 transitions, 280 flow [2023-01-27 18:02:28,360 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 122 places, 124 transitions, 280 flow [2023-01-27 18:02:28,384 INFO L130 PetriNetUnfolder]: 23/274 cut-off events. [2023-01-27 18:02:28,384 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-01-27 18:02:28,386 INFO L83 FinitePrefix]: Finished finitePrefix Result has 297 conditions, 274 events. 23/274 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 822 event pairs, 0 based on Foata normal form. 0/237 useless extension candidates. Maximal degree in co-relation 226. Up to 10 conditions per place. [2023-01-27 18:02:28,392 INFO L119 LiptonReduction]: Number of co-enabled transitions 8976 [2023-01-27 18:02:30,860 INFO L134 LiptonReduction]: Checked pairs total: 31692 [2023-01-27 18:02:30,891 INFO L136 LiptonReduction]: Total number of compositions: 74 [2023-01-27 18:02:30,893 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-27 18:02:30,893 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;@6898d5f8, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-27 18:02:30,893 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-01-27 18:02:30,894 INFO L130 PetriNetUnfolder]: 3/19 cut-off events. [2023-01-27 18:02:30,895 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-01-27 18:02:30,895 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 18:02:30,895 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-01-27 18:02:30,895 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-01-27 18:02:30,895 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 18:02:30,895 INFO L85 PathProgramCache]: Analyzing trace with hash 1649960361, now seen corresponding path program 1 times [2023-01-27 18:02:30,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 18:02:30,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508829738] [2023-01-27 18:02:30,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 18:02:30,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 18:02:30,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 18:02:31,053 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 18:02:31,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 18:02:31,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508829738] [2023-01-27 18:02:31,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508829738] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 18:02:31,054 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 18:02:31,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-27 18:02:31,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699506433] [2023-01-27 18:02:31,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 18:02:31,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 18:02:31,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 18:02:31,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 18:02:31,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 18:02:31,055 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 198 [2023-01-27 18:02:31,055 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 70 transitions, 172 flow. Second operand has 3 states, 3 states have (on average 70.0) internal successors, (210), 3 states have internal predecessors, (210), 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 18:02:31,056 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 18:02:31,056 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 198 [2023-01-27 18:02:31,056 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 18:03:55,938 INFO L130 PetriNetUnfolder]: 702540/894149 cut-off events. [2023-01-27 18:03:55,942 INFO L131 PetriNetUnfolder]: For 13777/13777 co-relation queries the response was YES. [2023-01-27 18:03:57,852 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1794684 conditions, 894149 events. 702540/894149 cut-off events. For 13777/13777 co-relation queries the response was YES. Maximal size of possible extension queue 16735. Compared 5806836 event pairs, 315859 based on Foata normal form. 0/750165 useless extension candidates. Maximal degree in co-relation 164756. Up to 545680 conditions per place. [2023-01-27 18:04:03,743 INFO L137 encePairwiseOnDemand]: 178/198 looper letters, 97 selfloop transitions, 10 changer transitions 0/110 dead transitions. [2023-01-27 18:04:03,744 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 110 transitions, 487 flow [2023-01-27 18:04:03,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 18:04:03,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 18:04:03,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 326 transitions. [2023-01-27 18:04:03,747 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5488215488215489 [2023-01-27 18:04:03,747 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 326 transitions. [2023-01-27 18:04:03,747 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 326 transitions. [2023-01-27 18:04:03,747 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 18:04:03,747 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 326 transitions. [2023-01-27 18:04:03,748 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 108.66666666666667) internal successors, (326), 3 states have internal predecessors, (326), 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 18:04:03,763 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 198.0) internal successors, (792), 4 states have internal predecessors, (792), 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 18:04:03,764 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 198.0) internal successors, (792), 4 states have internal predecessors, (792), 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 18:04:03,764 INFO L175 Difference]: Start difference. First operand has 69 places, 70 transitions, 172 flow. Second operand 3 states and 326 transitions. [2023-01-27 18:04:03,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 110 transitions, 487 flow [2023-01-27 18:04:03,802 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 110 transitions, 469 flow, removed 9 selfloop flow, removed 0 redundant places. [2023-01-27 18:04:03,805 INFO L231 Difference]: Finished difference. Result has 68 places, 70 transitions, 230 flow [2023-01-27 18:04:03,806 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=198, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=230, PETRI_PLACES=68, PETRI_TRANSITIONS=70} [2023-01-27 18:04:03,807 INFO L281 CegarLoopForPetriNet]: 69 programPoint places, -1 predicate places. [2023-01-27 18:04:03,807 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 70 transitions, 230 flow [2023-01-27 18:04:03,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 70.0) internal successors, (210), 3 states have internal predecessors, (210), 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 18:04:03,808 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 18:04:03,808 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 18:04:03,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-01-27 18:04:03,809 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-01-27 18:04:03,809 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 18:04:03,809 INFO L85 PathProgramCache]: Analyzing trace with hash -710619570, now seen corresponding path program 1 times [2023-01-27 18:04:03,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 18:04:03,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916516184] [2023-01-27 18:04:03,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 18:04:03,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 18:04:03,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 18:04:04,500 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 18:04:04,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 18:04:04,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916516184] [2023-01-27 18:04:04,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916516184] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 18:04:04,500 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 18:04:04,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-01-27 18:04:04,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699190951] [2023-01-27 18:04:04,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 18:04:04,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-27 18:04:04,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 18:04:04,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-27 18:04:04,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-01-27 18:04:04,502 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 198 [2023-01-27 18:04:04,502 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 70 transitions, 230 flow. Second operand has 5 states, 5 states have (on average 83.0) internal successors, (415), 5 states have internal predecessors, (415), 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 18:04:04,502 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 18:04:04,502 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 198 [2023-01-27 18:04:04,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 18:04:36,676 INFO L381 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([860] L718-->thr1Err0ASSERT_VIOLATIONERROR_FUNCTION: Formula: (not (= (mod v_~c~0_118 4294967296) 1)) InVars {~c~0=v_~c~0_118} OutVars{~c~0=v_~c~0_118} AuxVars[] AssignedVars[][131], [34#thr1Err0ASSERT_VIOLATIONERROR_FUNCTIONtrue, Black: 127#(= ~c~0 1), 74#thr1EXITtrue, thr1Thread1of4ForFork0InUse, thr1Thread2of4ForFork0InUse, 131#true, thr1Thread3of4ForFork0InUse, 56#L719true, 22#L716-2true, thr1Thread4of4ForFork0InUse, 54#L719true, 125#true]) [2023-01-27 18:04:36,676 INFO L383 tUnfolder$Statistics]: this new event has 49 ancestors and is cut-off event [2023-01-27 18:04:36,676 INFO L386 tUnfolder$Statistics]: existing Event has 49 ancestors and is cut-off event [2023-01-27 18:04:36,677 INFO L386 tUnfolder$Statistics]: existing Event has 49 ancestors and is cut-off event [2023-01-27 18:04:36,677 INFO L386 tUnfolder$Statistics]: existing Event has 49 ancestors and is cut-off event [2023-01-27 18:04:36,892 INFO L381 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([860] L718-->thr1Err0ASSERT_VIOLATIONERROR_FUNCTION: Formula: (not (= (mod v_~c~0_118 4294967296) 1)) InVars {~c~0=v_~c~0_118} OutVars{~c~0=v_~c~0_118} AuxVars[] AssignedVars[][131], [34#thr1Err0ASSERT_VIOLATIONERROR_FUNCTIONtrue, Black: 127#(= ~c~0 1), 74#thr1EXITtrue, thr1Thread1of4ForFork0InUse, 78#thr1EXITtrue, thr1Thread2of4ForFork0InUse, 131#true, thr1Thread3of4ForFork0InUse, 56#L719true, thr1Thread4of4ForFork0InUse, 54#L719true, 125#true]) [2023-01-27 18:04:36,892 INFO L383 tUnfolder$Statistics]: this new event has 50 ancestors and is cut-off event [2023-01-27 18:04:36,892 INFO L386 tUnfolder$Statistics]: existing Event has 50 ancestors and is cut-off event [2023-01-27 18:04:36,892 INFO L386 tUnfolder$Statistics]: existing Event has 50 ancestors and is cut-off event [2023-01-27 18:04:36,892 INFO L386 tUnfolder$Statistics]: existing Event has 50 ancestors and is cut-off event [2023-01-27 18:04:37,146 INFO L381 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([825] L719-->L716-2: Formula: (and (= |v_thr1Thread3of4ForFork0_#res#1.base_5| 0) (= v_~s~0_86 (+ v_~s~0_87 1)) (= |v_thr1Thread3of4ForFork0_#res#1.offset_5| 0)) InVars {~s~0=v_~s~0_87} OutVars{thr1Thread3of4ForFork0_#res#1.offset=|v_thr1Thread3of4ForFork0_#res#1.offset_5|, thr1Thread3of4ForFork0_#t~post5#1=|v_thr1Thread3of4ForFork0_#t~post5#1_5|, thr1Thread3of4ForFork0_#res#1.base=|v_thr1Thread3of4ForFork0_#res#1.base_5|, ~s~0=v_~s~0_86} AuxVars[] AssignedVars[thr1Thread3of4ForFork0_#res#1.offset, thr1Thread3of4ForFork0_#t~post5#1, thr1Thread3of4ForFork0_#res#1.base, ~s~0][124], [Black: 127#(= ~c~0 1), 42#L716-2true, 74#thr1EXITtrue, thr1Thread1of4ForFork0InUse, thr1Thread2of4ForFork0InUse, thr1Thread3of4ForFork0InUse, 131#true, 22#L716-2true, 56#L719true, thr1Thread4of4ForFork0InUse, 54#L719true, 125#true]) [2023-01-27 18:04:37,147 INFO L383 tUnfolder$Statistics]: this new event has 51 ancestors and is cut-off event [2023-01-27 18:04:37,147 INFO L386 tUnfolder$Statistics]: existing Event has 51 ancestors and is cut-off event [2023-01-27 18:04:37,147 INFO L386 tUnfolder$Statistics]: existing Event has 51 ancestors and is cut-off event [2023-01-27 18:04:37,148 INFO L386 tUnfolder$Statistics]: existing Event has 51 ancestors and is cut-off event [2023-01-27 18:04:37,223 INFO L381 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([825] L719-->L716-2: Formula: (and (= |v_thr1Thread3of4ForFork0_#res#1.base_5| 0) (= v_~s~0_86 (+ v_~s~0_87 1)) (= |v_thr1Thread3of4ForFork0_#res#1.offset_5| 0)) InVars {~s~0=v_~s~0_87} OutVars{thr1Thread3of4ForFork0_#res#1.offset=|v_thr1Thread3of4ForFork0_#res#1.offset_5|, thr1Thread3of4ForFork0_#t~post5#1=|v_thr1Thread3of4ForFork0_#t~post5#1_5|, thr1Thread3of4ForFork0_#res#1.base=|v_thr1Thread3of4ForFork0_#res#1.base_5|, ~s~0=v_~s~0_86} AuxVars[] AssignedVars[thr1Thread3of4ForFork0_#res#1.offset, thr1Thread3of4ForFork0_#t~post5#1, thr1Thread3of4ForFork0_#res#1.base, ~s~0][124], [Black: 127#(= ~c~0 1), 42#L716-2true, 74#thr1EXITtrue, thr1Thread1of4ForFork0InUse, 78#thr1EXITtrue, thr1Thread2of4ForFork0InUse, 131#true, thr1Thread3of4ForFork0InUse, 56#L719true, thr1Thread4of4ForFork0InUse, 54#L719true, 125#true]) [2023-01-27 18:04:37,223 INFO L383 tUnfolder$Statistics]: this new event has 52 ancestors and is cut-off event [2023-01-27 18:04:37,223 INFO L386 tUnfolder$Statistics]: existing Event has 52 ancestors and is cut-off event [2023-01-27 18:04:37,223 INFO L386 tUnfolder$Statistics]: existing Event has 52 ancestors and is cut-off event [2023-01-27 18:04:37,224 INFO L386 tUnfolder$Statistics]: existing Event has 52 ancestors and is cut-off event [2023-01-27 18:04:37,306 INFO L130 PetriNetUnfolder]: 214012/314249 cut-off events. [2023-01-27 18:04:37,306 INFO L131 PetriNetUnfolder]: For 64987/82854 co-relation queries the response was YES. [2023-01-27 18:04:38,672 INFO L83 FinitePrefix]: Finished finitePrefix Result has 690337 conditions, 314249 events. 214012/314249 cut-off events. For 64987/82854 co-relation queries the response was YES. Maximal size of possible extension queue 10484. Compared 2730196 event pairs, 98760 based on Foata normal form. 11371/278583 useless extension candidates. Maximal degree in co-relation 621105. Up to 229101 conditions per place. [2023-01-27 18:04:41,088 INFO L137 encePairwiseOnDemand]: 185/198 looper letters, 84 selfloop transitions, 25 changer transitions 0/137 dead transitions. [2023-01-27 18:04:41,088 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 137 transitions, 622 flow [2023-01-27 18:04:41,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-27 18:04:41,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-27 18:04:41,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 515 transitions. [2023-01-27 18:04:41,089 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5202020202020202 [2023-01-27 18:04:41,090 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 515 transitions. [2023-01-27 18:04:41,090 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 515 transitions. [2023-01-27 18:04:41,090 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 18:04:41,090 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 515 transitions. [2023-01-27 18:04:41,091 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 103.0) internal successors, (515), 5 states have internal predecessors, (515), 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 18:04:41,092 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 198.0) internal successors, (1188), 6 states have internal predecessors, (1188), 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 18:04:41,093 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 198.0) internal successors, (1188), 6 states have internal predecessors, (1188), 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 18:04:41,093 INFO L175 Difference]: Start difference. First operand has 68 places, 70 transitions, 230 flow. Second operand 5 states and 515 transitions. [2023-01-27 18:04:41,093 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 137 transitions, 622 flow [2023-01-27 18:04:41,414 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 137 transitions, 602 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-01-27 18:04:41,415 INFO L231 Difference]: Finished difference. Result has 72 places, 94 transitions, 357 flow [2023-01-27 18:04:41,415 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=198, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=357, PETRI_PLACES=72, PETRI_TRANSITIONS=94} [2023-01-27 18:04:41,417 INFO L281 CegarLoopForPetriNet]: 69 programPoint places, 3 predicate places. [2023-01-27 18:04:41,417 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 94 transitions, 357 flow [2023-01-27 18:04:41,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 83.0) internal successors, (415), 5 states have internal predecessors, (415), 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 18:04:41,417 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 18:04:41,418 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 18:04:41,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-01-27 18:04:41,418 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-01-27 18:04:41,418 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 18:04:41,418 INFO L85 PathProgramCache]: Analyzing trace with hash -722332370, now seen corresponding path program 2 times [2023-01-27 18:04:41,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 18:04:41,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196602344] [2023-01-27 18:04:41,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 18:04:41,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 18:04:41,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 18:04:41,666 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 18:04:41,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 18:04:41,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196602344] [2023-01-27 18:04:41,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196602344] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 18:04:41,667 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 18:04:41,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-01-27 18:04:41,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26655721] [2023-01-27 18:04:41,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 18:04:41,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-27 18:04:41,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 18:04:41,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-27 18:04:41,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-01-27 18:04:41,668 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 198 [2023-01-27 18:04:41,668 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 94 transitions, 357 flow. Second operand has 5 states, 5 states have (on average 82.0) internal successors, (410), 5 states have internal predecessors, (410), 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 18:04:41,669 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 18:04:41,669 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 198 [2023-01-27 18:04:41,669 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 18:05:18,362 INFO L130 PetriNetUnfolder]: 214472/314654 cut-off events. [2023-01-27 18:05:18,362 INFO L131 PetriNetUnfolder]: For 97203/128704 co-relation queries the response was YES. [2023-01-27 18:05:19,825 INFO L83 FinitePrefix]: Finished finitePrefix Result has 728407 conditions, 314654 events. 214472/314654 cut-off events. For 97203/128704 co-relation queries the response was YES. Maximal size of possible extension queue 10853. Compared 2734227 event pairs, 99127 based on Foata normal form. 11784/289398 useless extension candidates. Maximal degree in co-relation 656095. Up to 229695 conditions per place. [2023-01-27 18:05:21,949 INFO L137 encePairwiseOnDemand]: 186/198 looper letters, 91 selfloop transitions, 24 changer transitions 0/143 dead transitions. [2023-01-27 18:05:21,949 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 143 transitions, 739 flow [2023-01-27 18:05:21,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-27 18:05:21,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-27 18:05:21,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 507 transitions. [2023-01-27 18:05:21,958 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5121212121212121 [2023-01-27 18:05:21,958 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 507 transitions. [2023-01-27 18:05:21,958 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 507 transitions. [2023-01-27 18:05:21,958 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 18:05:21,958 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 507 transitions. [2023-01-27 18:05:21,960 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 101.4) internal successors, (507), 5 states have internal predecessors, (507), 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 18:05:21,961 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 198.0) internal successors, (1188), 6 states have internal predecessors, (1188), 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 18:05:21,962 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 198.0) internal successors, (1188), 6 states have internal predecessors, (1188), 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 18:05:21,962 INFO L175 Difference]: Start difference. First operand has 72 places, 94 transitions, 357 flow. Second operand 5 states and 507 transitions. [2023-01-27 18:05:21,962 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 143 transitions, 739 flow [2023-01-27 18:05:21,991 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 143 transitions, 739 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-01-27 18:05:21,994 INFO L231 Difference]: Finished difference. Result has 77 places, 102 transitions, 464 flow [2023-01-27 18:05:21,994 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=198, PETRI_DIFFERENCE_MINUEND_FLOW=357, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=464, PETRI_PLACES=77, PETRI_TRANSITIONS=102} [2023-01-27 18:05:21,997 INFO L281 CegarLoopForPetriNet]: 69 programPoint places, 8 predicate places. [2023-01-27 18:05:21,997 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 102 transitions, 464 flow [2023-01-27 18:05:21,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 82.0) internal successors, (410), 5 states have internal predecessors, (410), 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 18:05:21,999 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 18:05:21,999 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 18:05:21,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-01-27 18:05:21,999 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-01-27 18:05:21,999 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 18:05:21,999 INFO L85 PathProgramCache]: Analyzing trace with hash -1755268447, now seen corresponding path program 1 times [2023-01-27 18:05:22,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 18:05:22,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863713445] [2023-01-27 18:05:22,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 18:05:22,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 18:05:22,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 18:05:22,389 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 18:05:22,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 18:05:22,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863713445] [2023-01-27 18:05:22,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863713445] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 18:05:22,390 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 18:05:22,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-01-27 18:05:22,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488726001] [2023-01-27 18:05:22,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 18:05:22,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-27 18:05:22,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 18:05:22,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-27 18:05:22,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-01-27 18:05:22,392 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 198 [2023-01-27 18:05:22,393 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 102 transitions, 464 flow. Second operand has 5 states, 5 states have (on average 83.2) internal successors, (416), 5 states have internal predecessors, (416), 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 18:05:22,393 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 18:05:22,393 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 198 [2023-01-27 18:05:22,393 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 18:05:58,992 INFO L381 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([860] L718-->thr1Err0ASSERT_VIOLATIONERROR_FUNCTION: Formula: (not (= (mod v_~c~0_118 4294967296) 1)) InVars {~c~0=v_~c~0_118} OutVars{~c~0=v_~c~0_118} AuxVars[] AssignedVars[][145], [Black: 127#(= ~c~0 1), 139#true, Black: 135#(and (<= 1 (select (select |#memory_int| |thr1Thread1of4ForFork0_~#l~0#1.base|) |thr1Thread1of4ForFork0_~#l~0#1.offset|)) (< (div (select (select |#memory_int| |thr1Thread1of4ForFork0_~#l~0#1.base|) |thr1Thread1of4ForFork0_~#l~0#1.offset|) 4294967296) 1) (= ~s~0 0)), 131#true, 56#L719true, Black: 134#(and (<= ~t~0 1) (<= 1 ~t~0) (= ~s~0 0)), 54#L719true, 146#true, 34#thr1Err0ASSERT_VIOLATIONERROR_FUNCTIONtrue, Black: 143#(and (<= 1 (select (select |#memory_int| |ULTIMATE.start_thr1_~#l~0#1.base|) |ULTIMATE.start_thr1_~#l~0#1.offset|)) (< (div (select (select |#memory_int| |ULTIMATE.start_thr1_~#l~0#1.base|) |ULTIMATE.start_thr1_~#l~0#1.offset|) 4294967296) 1) (= ~s~0 0)), 74#thr1EXITtrue, thr1Thread1of4ForFork0InUse, thr1Thread2of4ForFork0InUse, thr1Thread3of4ForFork0InUse, 22#L716-2true, thr1Thread4of4ForFork0InUse]) [2023-01-27 18:05:58,994 INFO L383 tUnfolder$Statistics]: this new event has 49 ancestors and is cut-off event [2023-01-27 18:05:58,994 INFO L386 tUnfolder$Statistics]: existing Event has 49 ancestors and is cut-off event [2023-01-27 18:05:58,994 INFO L386 tUnfolder$Statistics]: existing Event has 49 ancestors and is cut-off event [2023-01-27 18:05:58,994 INFO L386 tUnfolder$Statistics]: existing Event has 49 ancestors and is cut-off event [2023-01-27 18:05:59,375 INFO L381 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([860] L718-->thr1Err0ASSERT_VIOLATIONERROR_FUNCTION: Formula: (not (= (mod v_~c~0_118 4294967296) 1)) InVars {~c~0=v_~c~0_118} OutVars{~c~0=v_~c~0_118} AuxVars[] AssignedVars[][145], [Black: 127#(= ~c~0 1), 139#true, Black: 135#(and (<= 1 (select (select |#memory_int| |thr1Thread1of4ForFork0_~#l~0#1.base|) |thr1Thread1of4ForFork0_~#l~0#1.offset|)) (< (div (select (select |#memory_int| |thr1Thread1of4ForFork0_~#l~0#1.base|) |thr1Thread1of4ForFork0_~#l~0#1.offset|) 4294967296) 1) (= ~s~0 0)), 131#true, 56#L719true, Black: 134#(and (<= ~t~0 1) (<= 1 ~t~0) (= ~s~0 0)), 54#L719true, 146#true, 34#thr1Err0ASSERT_VIOLATIONERROR_FUNCTIONtrue, Black: 143#(and (<= 1 (select (select |#memory_int| |ULTIMATE.start_thr1_~#l~0#1.base|) |ULTIMATE.start_thr1_~#l~0#1.offset|)) (< (div (select (select |#memory_int| |ULTIMATE.start_thr1_~#l~0#1.base|) |ULTIMATE.start_thr1_~#l~0#1.offset|) 4294967296) 1) (= ~s~0 0)), 74#thr1EXITtrue, thr1Thread1of4ForFork0InUse, 78#thr1EXITtrue, thr1Thread2of4ForFork0InUse, thr1Thread3of4ForFork0InUse, thr1Thread4of4ForFork0InUse]) [2023-01-27 18:05:59,375 INFO L383 tUnfolder$Statistics]: this new event has 50 ancestors and is cut-off event [2023-01-27 18:05:59,376 INFO L386 tUnfolder$Statistics]: existing Event has 50 ancestors and is cut-off event [2023-01-27 18:05:59,376 INFO L386 tUnfolder$Statistics]: existing Event has 50 ancestors and is cut-off event [2023-01-27 18:05:59,376 INFO L386 tUnfolder$Statistics]: existing Event has 50 ancestors and is cut-off event [2023-01-27 18:06:00,081 INFO L381 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([825] L719-->L716-2: Formula: (and (= |v_thr1Thread3of4ForFork0_#res#1.base_5| 0) (= v_~s~0_86 (+ v_~s~0_87 1)) (= |v_thr1Thread3of4ForFork0_#res#1.offset_5| 0)) InVars {~s~0=v_~s~0_87} OutVars{thr1Thread3of4ForFork0_#res#1.offset=|v_thr1Thread3of4ForFork0_#res#1.offset_5|, thr1Thread3of4ForFork0_#t~post5#1=|v_thr1Thread3of4ForFork0_#t~post5#1_5|, thr1Thread3of4ForFork0_#res#1.base=|v_thr1Thread3of4ForFork0_#res#1.base_5|, ~s~0=v_~s~0_86} AuxVars[] AssignedVars[thr1Thread3of4ForFork0_#res#1.offset, thr1Thread3of4ForFork0_#t~post5#1, thr1Thread3of4ForFork0_#res#1.base, ~s~0][130], [Black: 127#(= ~c~0 1), 139#true, 42#L716-2true, Black: 135#(and (<= 1 (select (select |#memory_int| |thr1Thread1of4ForFork0_~#l~0#1.base|) |thr1Thread1of4ForFork0_~#l~0#1.offset|)) (< (div (select (select |#memory_int| |thr1Thread1of4ForFork0_~#l~0#1.base|) |thr1Thread1of4ForFork0_~#l~0#1.offset|) 4294967296) 1) (= ~s~0 0)), 131#true, Black: 134#(and (<= ~t~0 1) (<= 1 ~t~0) (= ~s~0 0)), 56#L719true, 54#L719true, 146#true, Black: 143#(and (<= 1 (select (select |#memory_int| |ULTIMATE.start_thr1_~#l~0#1.base|) |ULTIMATE.start_thr1_~#l~0#1.offset|)) (< (div (select (select |#memory_int| |ULTIMATE.start_thr1_~#l~0#1.base|) |ULTIMATE.start_thr1_~#l~0#1.offset|) 4294967296) 1) (= ~s~0 0)), 74#thr1EXITtrue, thr1Thread1of4ForFork0InUse, thr1Thread2of4ForFork0InUse, thr1Thread3of4ForFork0InUse, 22#L716-2true, thr1Thread4of4ForFork0InUse]) [2023-01-27 18:06:00,081 INFO L383 tUnfolder$Statistics]: this new event has 51 ancestors and is cut-off event [2023-01-27 18:06:00,081 INFO L386 tUnfolder$Statistics]: existing Event has 51 ancestors and is cut-off event [2023-01-27 18:06:00,081 INFO L386 tUnfolder$Statistics]: existing Event has 51 ancestors and is cut-off event [2023-01-27 18:06:00,081 INFO L386 tUnfolder$Statistics]: existing Event has 51 ancestors and is cut-off event [2023-01-27 18:06:00,223 INFO L381 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([825] L719-->L716-2: Formula: (and (= |v_thr1Thread3of4ForFork0_#res#1.base_5| 0) (= v_~s~0_86 (+ v_~s~0_87 1)) (= |v_thr1Thread3of4ForFork0_#res#1.offset_5| 0)) InVars {~s~0=v_~s~0_87} OutVars{thr1Thread3of4ForFork0_#res#1.offset=|v_thr1Thread3of4ForFork0_#res#1.offset_5|, thr1Thread3of4ForFork0_#t~post5#1=|v_thr1Thread3of4ForFork0_#t~post5#1_5|, thr1Thread3of4ForFork0_#res#1.base=|v_thr1Thread3of4ForFork0_#res#1.base_5|, ~s~0=v_~s~0_86} AuxVars[] AssignedVars[thr1Thread3of4ForFork0_#res#1.offset, thr1Thread3of4ForFork0_#t~post5#1, thr1Thread3of4ForFork0_#res#1.base, ~s~0][130], [Black: 127#(= ~c~0 1), 139#true, 42#L716-2true, Black: 135#(and (<= 1 (select (select |#memory_int| |thr1Thread1of4ForFork0_~#l~0#1.base|) |thr1Thread1of4ForFork0_~#l~0#1.offset|)) (< (div (select (select |#memory_int| |thr1Thread1of4ForFork0_~#l~0#1.base|) |thr1Thread1of4ForFork0_~#l~0#1.offset|) 4294967296) 1) (= ~s~0 0)), 131#true, 56#L719true, Black: 134#(and (<= ~t~0 1) (<= 1 ~t~0) (= ~s~0 0)), 54#L719true, 146#true, Black: 143#(and (<= 1 (select (select |#memory_int| |ULTIMATE.start_thr1_~#l~0#1.base|) |ULTIMATE.start_thr1_~#l~0#1.offset|)) (< (div (select (select |#memory_int| |ULTIMATE.start_thr1_~#l~0#1.base|) |ULTIMATE.start_thr1_~#l~0#1.offset|) 4294967296) 1) (= ~s~0 0)), 74#thr1EXITtrue, thr1Thread1of4ForFork0InUse, thr1Thread2of4ForFork0InUse, 78#thr1EXITtrue, thr1Thread3of4ForFork0InUse, thr1Thread4of4ForFork0InUse]) [2023-01-27 18:06:00,224 INFO L383 tUnfolder$Statistics]: this new event has 52 ancestors and is cut-off event [2023-01-27 18:06:00,224 INFO L386 tUnfolder$Statistics]: existing Event has 52 ancestors and is cut-off event [2023-01-27 18:06:00,224 INFO L386 tUnfolder$Statistics]: existing Event has 52 ancestors and is cut-off event [2023-01-27 18:06:00,224 INFO L386 tUnfolder$Statistics]: existing Event has 52 ancestors and is cut-off event [2023-01-27 18:06:00,411 INFO L130 PetriNetUnfolder]: 214920/316110 cut-off events. [2023-01-27 18:06:00,411 INFO L131 PetriNetUnfolder]: For 191155/234750 co-relation queries the response was YES. [2023-01-27 18:06:02,232 INFO L83 FinitePrefix]: Finished finitePrefix Result has 789285 conditions, 316110 events. 214920/316110 cut-off events. For 191155/234750 co-relation queries the response was YES. Maximal size of possible extension queue 11066. Compared 2761820 event pairs, 98036 based on Foata normal form. 11030/295118 useless extension candidates. Maximal degree in co-relation 712359. Up to 227292 conditions per place. [2023-01-27 18:06:04,687 INFO L137 encePairwiseOnDemand]: 185/198 looper letters, 101 selfloop transitions, 25 changer transitions 0/154 dead transitions. [2023-01-27 18:06:04,687 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 154 transitions, 902 flow [2023-01-27 18:06:04,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-27 18:06:04,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-27 18:06:04,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 515 transitions. [2023-01-27 18:06:04,691 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5202020202020202 [2023-01-27 18:06:04,691 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 515 transitions. [2023-01-27 18:06:04,691 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 515 transitions. [2023-01-27 18:06:04,692 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 18:06:04,692 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 515 transitions. [2023-01-27 18:06:04,693 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 103.0) internal successors, (515), 5 states have internal predecessors, (515), 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 18:06:04,694 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 198.0) internal successors, (1188), 6 states have internal predecessors, (1188), 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 18:06:04,694 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 198.0) internal successors, (1188), 6 states have internal predecessors, (1188), 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 18:06:04,694 INFO L175 Difference]: Start difference. First operand has 77 places, 102 transitions, 464 flow. Second operand 5 states and 515 transitions. [2023-01-27 18:06:04,694 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 154 transitions, 902 flow [2023-01-27 18:06:04,766 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 154 transitions, 847 flow, removed 8 selfloop flow, removed 3 redundant places. [2023-01-27 18:06:04,785 INFO L231 Difference]: Finished difference. Result has 79 places, 111 transitions, 537 flow [2023-01-27 18:06:04,785 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=198, PETRI_DIFFERENCE_MINUEND_FLOW=409, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=537, PETRI_PLACES=79, PETRI_TRANSITIONS=111} [2023-01-27 18:06:04,786 INFO L281 CegarLoopForPetriNet]: 69 programPoint places, 10 predicate places. [2023-01-27 18:06:04,786 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 111 transitions, 537 flow [2023-01-27 18:06:04,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 83.2) internal successors, (416), 5 states have internal predecessors, (416), 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 18:06:04,786 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 18:06:04,786 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2023-01-27 18:06:04,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-01-27 18:06:04,786 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-01-27 18:06:04,786 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 18:06:04,786 INFO L85 PathProgramCache]: Analyzing trace with hash -925350526, now seen corresponding path program 1 times [2023-01-27 18:06:04,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 18:06:04,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599276632] [2023-01-27 18:06:04,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 18:06:04,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 18:06:04,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 18:06:04,823 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-27 18:06:04,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 18:06:04,842 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-27 18:06:04,842 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-27 18:06:04,842 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2023-01-27 18:06:04,842 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 7 remaining) [2023-01-27 18:06:04,842 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (4 of 7 remaining) [2023-01-27 18:06:04,842 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 7 remaining) [2023-01-27 18:06:04,842 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 7 remaining) [2023-01-27 18:06:04,842 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 7 remaining) [2023-01-27 18:06:04,842 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 7 remaining) [2023-01-27 18:06:04,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-01-27 18:06:04,843 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1] [2023-01-27 18:06:04,843 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-27 18:06:04,843 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-01-27 18:06:04,914 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-01-27 18:06:04,915 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 140 places, 142 transitions, 329 flow [2023-01-27 18:06:04,936 INFO L130 PetriNetUnfolder]: 28/330 cut-off events. [2023-01-27 18:06:04,936 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-01-27 18:06:04,946 INFO L83 FinitePrefix]: Finished finitePrefix Result has 361 conditions, 330 events. 28/330 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 1028 event pairs, 0 based on Foata normal form. 0/285 useless extension candidates. Maximal degree in co-relation 287. Up to 12 conditions per place. [2023-01-27 18:06:04,946 INFO L82 GeneralOperation]: Start removeDead. Operand has 140 places, 142 transitions, 329 flow [2023-01-27 18:06:04,947 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 140 places, 142 transitions, 329 flow [2023-01-27 18:06:04,948 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-27 18:06:04,948 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 140 places, 142 transitions, 329 flow [2023-01-27 18:06:04,948 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 140 places, 142 transitions, 329 flow [2023-01-27 18:06:04,948 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 140 places, 142 transitions, 329 flow [2023-01-27 18:06:04,982 INFO L130 PetriNetUnfolder]: 28/330 cut-off events. [2023-01-27 18:06:04,982 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-01-27 18:06:04,983 INFO L83 FinitePrefix]: Finished finitePrefix Result has 361 conditions, 330 events. 28/330 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 1028 event pairs, 0 based on Foata normal form. 0/285 useless extension candidates. Maximal degree in co-relation 287. Up to 12 conditions per place. [2023-01-27 18:06:04,990 INFO L119 LiptonReduction]: Number of co-enabled transitions 12750 [2023-01-27 18:06:07,804 INFO L134 LiptonReduction]: Checked pairs total: 53630 [2023-01-27 18:06:07,805 INFO L136 LiptonReduction]: Total number of compositions: 82 [2023-01-27 18:06:07,806 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-27 18:06:07,806 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;@6898d5f8, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-27 18:06:07,806 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2023-01-27 18:06:07,807 INFO L130 PetriNetUnfolder]: 3/19 cut-off events. [2023-01-27 18:06:07,807 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-01-27 18:06:07,807 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 18:06:07,807 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-01-27 18:06:07,807 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2023-01-27 18:06:07,808 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 18:06:07,808 INFO L85 PathProgramCache]: Analyzing trace with hash 246127397, now seen corresponding path program 1 times [2023-01-27 18:06:07,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 18:06:07,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214983552] [2023-01-27 18:06:07,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 18:06:07,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 18:06:07,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 18:06:07,956 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 18:06:07,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 18:06:07,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214983552] [2023-01-27 18:06:07,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214983552] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 18:06:07,956 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 18:06:07,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-27 18:06:07,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137848922] [2023-01-27 18:06:07,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 18:06:07,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 18:06:07,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 18:06:07,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 18:06:07,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 18:06:07,958 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 224 [2023-01-27 18:06:07,958 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 83 transitions, 211 flow. Second operand has 3 states, 3 states have (on average 77.0) internal successors, (231), 3 states have internal predecessors, (231), 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 18:06:07,958 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 18:06:07,958 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 224 [2023-01-27 18:06:07,958 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand