/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-ac9dbd0-m [2023-08-23 22:54:13,390 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-23 22:54:13,480 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf [2023-08-23 22:54:13,485 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-23 22:54:13,486 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-23 22:54:13,520 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-23 22:54:13,520 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-23 22:54:13,521 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-23 22:54:13,521 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-23 22:54:13,525 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-23 22:54:13,526 INFO L153 SettingsManager]: * Use SBE=true [2023-08-23 22:54:13,526 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-23 22:54:13,526 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-23 22:54:13,527 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-23 22:54:13,528 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-23 22:54:13,528 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-23 22:54:13,528 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-23 22:54:13,529 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-23 22:54:13,529 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-23 22:54:13,529 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-23 22:54:13,529 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-23 22:54:13,530 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-23 22:54:13,530 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-23 22:54:13,530 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-23 22:54:13,531 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-23 22:54:13,531 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-23 22:54:13,531 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-23 22:54:13,531 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-23 22:54:13,532 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-23 22:54:13,532 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-23 22:54:13,533 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-23 22:54:13,533 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-23 22:54:13,533 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-23 22:54:13,533 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-23 22:54:13,533 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-23 22:54:13,534 INFO L153 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-08-23 22:54:13,869 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-23 22:54:13,890 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-23 22:54:13,892 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-23 22:54:13,893 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-23 22:54:13,894 INFO L274 PluginConnector]: CDTParser initialized [2023-08-23 22:54:13,896 INFO L431 ainManager$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 [2023-08-23 22:54:15,056 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-23 22:54:15,305 INFO L384 CDTParser]: Found 1 translation units. [2023-08-23 22:54:15,305 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/48_ticket_lock_low_contention_vs.i [2023-08-23 22:54:15,325 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fe28610e6/406f470e8c4845518957e89a8c280427/FLAG6f47edbd6 [2023-08-23 22:54:15,342 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fe28610e6/406f470e8c4845518957e89a8c280427 [2023-08-23 22:54:15,344 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-23 22:54:15,345 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-23 22:54:15,346 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-23 22:54:15,346 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-23 22:54:15,349 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-23 22:54:15,349 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.08 10:54:15" (1/1) ... [2023-08-23 22:54:15,350 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c0b533e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 10:54:15, skipping insertion in model container [2023-08-23 22:54:15,350 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.08 10:54:15" (1/1) ... [2023-08-23 22:54:15,396 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-23 22:54:15,547 WARN L635 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-08-23 22:54:15,698 WARN L240 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] [2023-08-23 22:54:15,706 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-23 22:54:15,715 INFO L201 MainTranslator]: Completed pre-run [2023-08-23 22:54:15,740 WARN L635 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-08-23 22:54:15,745 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [270] [2023-08-23 22:54:15,747 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [270] [2023-08-23 22:54:15,765 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: volatile unsigned [705] [2023-08-23 22:54:15,765 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: volatile unsigned [706] [2023-08-23 22:54:15,766 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: unsigned [707] [2023-08-23 22:54:15,767 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: unsigned [713] [2023-08-23 22:54:15,768 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: unsigned [716] [2023-08-23 22:54:15,770 WARN L240 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] [2023-08-23 22:54:15,775 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-23 22:54:15,808 WARN L669 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-23 22:54:15,808 WARN L669 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-23 22:54:15,809 WARN L669 CHandler]: The function __builtin_bswap16 is called, but not defined or handled by StandardFunctionHandler. [2023-08-23 22:54:15,815 INFO L206 MainTranslator]: Completed translation [2023-08-23 22:54:15,815 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 10:54:15 WrapperNode [2023-08-23 22:54:15,815 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-23 22:54:15,816 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-23 22:54:15,816 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-23 22:54:15,816 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-23 22:54:15,822 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 10:54:15" (1/1) ... [2023-08-23 22:54:15,836 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 10:54:15" (1/1) ... [2023-08-23 22:54:15,866 INFO L138 Inliner]: procedures = 173, calls = 24, calls flagged for inlining = 5, calls inlined = 7, statements flattened = 109 [2023-08-23 22:54:15,866 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-23 22:54:15,867 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-23 22:54:15,868 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-23 22:54:15,868 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-23 22:54:15,876 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 10:54:15" (1/1) ... [2023-08-23 22:54:15,876 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 10:54:15" (1/1) ... [2023-08-23 22:54:15,890 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 10:54:15" (1/1) ... [2023-08-23 22:54:15,892 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 10:54:15" (1/1) ... [2023-08-23 22:54:15,896 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 10:54:15" (1/1) ... [2023-08-23 22:54:15,899 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 10:54:15" (1/1) ... [2023-08-23 22:54:15,900 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 10:54:15" (1/1) ... [2023-08-23 22:54:15,901 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 10:54:15" (1/1) ... [2023-08-23 22:54:15,903 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-23 22:54:15,904 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-23 22:54:15,904 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-23 22:54:15,916 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-23 22:54:15,916 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 10:54:15" (1/1) ... [2023-08-23 22:54:15,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-23 22:54:15,939 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-23 22:54:15,951 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) [2023-08-23 22:54:15,976 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 [2023-08-23 22:54:15,998 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-23 22:54:15,999 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-08-23 22:54:16,000 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-08-23 22:54:16,001 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-23 22:54:16,001 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-23 22:54:16,001 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-23 22:54:16,001 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-23 22:54:16,001 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-23 22:54:16,001 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-23 22:54:16,001 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-23 22:54:16,001 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-23 22:54:16,002 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-23 22:54:16,003 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-23 22:54:16,150 INFO L236 CfgBuilder]: Building ICFG [2023-08-23 22:54:16,151 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-23 22:54:16,372 INFO L277 CfgBuilder]: Performing block encoding [2023-08-23 22:54:16,464 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-23 22:54:16,464 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-23 22:54:16,467 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.08 10:54:16 BoogieIcfgContainer [2023-08-23 22:54:16,467 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-23 22:54:16,469 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-23 22:54:16,469 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-23 22:54:16,472 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-23 22:54:16,472 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.08 10:54:15" (1/3) ... [2023-08-23 22:54:16,473 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d13fec5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.08 10:54:16, skipping insertion in model container [2023-08-23 22:54:16,473 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 10:54:15" (2/3) ... [2023-08-23 22:54:16,473 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d13fec5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.08 10:54:16, skipping insertion in model container [2023-08-23 22:54:16,473 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.08 10:54:16" (3/3) ... [2023-08-23 22:54:16,474 INFO L112 eAbstractionObserver]: Analyzing ICFG 48_ticket_lock_low_contention_vs.i [2023-08-23 22:54:16,488 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-23 22:54:16,489 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-08-23 22:54:16,489 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-23 22:54:16,540 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-23 22:54:16,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 68 places, 70 transitions, 145 flow [2023-08-23 22:54:16,647 INFO L124 PetriNetUnfolderBase]: 8/106 cut-off events. [2023-08-23 22:54:16,647 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-23 22:54:16,652 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. [2023-08-23 22:54:16,652 INFO L82 GeneralOperation]: Start removeDead. Operand has 68 places, 70 transitions, 145 flow [2023-08-23 22:54:16,655 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 68 places, 70 transitions, 145 flow [2023-08-23 22:54:16,658 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-23 22:54:16,665 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 68 places, 70 transitions, 145 flow [2023-08-23 22:54:16,667 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 68 places, 70 transitions, 145 flow [2023-08-23 22:54:16,668 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 68 places, 70 transitions, 145 flow [2023-08-23 22:54:16,691 INFO L124 PetriNetUnfolderBase]: 8/106 cut-off events. [2023-08-23 22:54:16,691 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-23 22:54:16,692 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. [2023-08-23 22:54:16,694 INFO L119 LiptonReduction]: Number of co-enabled transitions 1326 [2023-08-23 22:54:17,973 INFO L134 LiptonReduction]: Checked pairs total: 3786 [2023-08-23 22:54:17,973 INFO L136 LiptonReduction]: Total number of compositions: 50 [2023-08-23 22:54:17,986 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-23 22:54:17,991 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;@220c736a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-23 22:54:17,992 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-23 22:54:17,996 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-23 22:54:17,997 INFO L124 PetriNetUnfolderBase]: 3/18 cut-off events. [2023-08-23 22:54:17,997 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-23 22:54:17,997 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:54:17,998 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-23 22:54:17,998 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)] === [2023-08-23 22:54:18,002 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:54:18,002 INFO L85 PathProgramCache]: Analyzing trace with hash 2028827622, now seen corresponding path program 1 times [2023-08-23 22:54:18,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:54:18,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41570376] [2023-08-23 22:54:18,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:54:18,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:54:18,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:54:18,366 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 22:54:18,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 22:54:18,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41570376] [2023-08-23 22:54:18,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41570376] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-23 22:54:18,368 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-23 22:54:18,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-23 22:54:18,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160484477] [2023-08-23 22:54:18,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-23 22:54:18,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-23 22:54:18,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 22:54:18,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-23 22:54:18,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-23 22:54:18,403 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 120 [2023-08-23 22:54:18,405 INFO L103 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) [2023-08-23 22:54:18,405 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 22:54:18,405 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 120 [2023-08-23 22:54:18,406 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 22:54:18,549 INFO L124 PetriNetUnfolderBase]: 125/266 cut-off events. [2023-08-23 22:54:18,550 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-23 22:54:18,554 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. [2023-08-23 22:54:18,556 INFO L140 encePairwiseOnDemand]: 112/120 looper letters, 33 selfloop transitions, 4 changer transitions 9/47 dead transitions. [2023-08-23 22:54:18,556 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 47 transitions, 191 flow [2023-08-23 22:54:18,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-23 22:54:18,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-23 22:54:18,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 193 transitions. [2023-08-23 22:54:18,571 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5361111111111111 [2023-08-23 22:54:18,572 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 193 transitions. [2023-08-23 22:54:18,572 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 193 transitions. [2023-08-23 22:54:18,574 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 22:54:18,576 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 193 transitions. [2023-08-23 22:54:18,580 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) [2023-08-23 22:54:18,585 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) [2023-08-23 22:54:18,585 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) [2023-08-23 22:54:18,587 INFO L175 Difference]: Start difference. First operand has 29 places, 30 transitions, 65 flow. Second operand 3 states and 193 transitions. [2023-08-23 22:54:18,587 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 47 transitions, 191 flow [2023-08-23 22:54:18,589 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 47 transitions, 191 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-23 22:54:18,591 INFO L231 Difference]: Finished difference. Result has 31 places, 28 transitions, 85 flow [2023-08-23 22:54:18,592 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} [2023-08-23 22:54:18,598 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 2 predicate places. [2023-08-23 22:54:18,598 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 28 transitions, 85 flow [2023-08-23 22:54:18,599 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) [2023-08-23 22:54:18,599 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:54:18,599 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-23 22:54:18,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-23 22:54:18,600 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)] === [2023-08-23 22:54:18,602 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:54:18,602 INFO L85 PathProgramCache]: Analyzing trace with hash 2028104312, now seen corresponding path program 1 times [2023-08-23 22:54:18,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:54:18,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611656807] [2023-08-23 22:54:18,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:54:18,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:54:18,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-23 22:54:18,624 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-23 22:54:18,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-23 22:54:18,661 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-23 22:54:18,661 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-23 22:54:18,663 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-08-23 22:54:18,664 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-08-23 22:54:18,665 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2023-08-23 22:54:18,665 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2023-08-23 22:54:18,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-23 22:54:18,665 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-23 22:54:18,669 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-23 22:54:18,670 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-23 22:54:18,704 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-23 22:54:18,707 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 86 places, 88 transitions, 188 flow [2023-08-23 22:54:18,728 INFO L124 PetriNetUnfolderBase]: 13/162 cut-off events. [2023-08-23 22:54:18,729 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-23 22:54:18,733 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. [2023-08-23 22:54:18,733 INFO L82 GeneralOperation]: Start removeDead. Operand has 86 places, 88 transitions, 188 flow [2023-08-23 22:54:18,734 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 86 places, 88 transitions, 188 flow [2023-08-23 22:54:18,734 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-23 22:54:18,735 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 86 places, 88 transitions, 188 flow [2023-08-23 22:54:18,735 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 86 places, 88 transitions, 188 flow [2023-08-23 22:54:18,735 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 86 places, 88 transitions, 188 flow [2023-08-23 22:54:18,750 INFO L124 PetriNetUnfolderBase]: 13/162 cut-off events. [2023-08-23 22:54:18,751 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-23 22:54:18,752 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. [2023-08-23 22:54:18,756 INFO L119 LiptonReduction]: Number of co-enabled transitions 3264 [2023-08-23 22:54:19,938 INFO L134 LiptonReduction]: Checked pairs total: 10424 [2023-08-23 22:54:19,939 INFO L136 LiptonReduction]: Total number of compositions: 57 [2023-08-23 22:54:19,941 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-23 22:54:19,942 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;@220c736a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-23 22:54:19,942 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-08-23 22:54:19,944 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-23 22:54:19,944 INFO L124 PetriNetUnfolderBase]: 3/19 cut-off events. [2023-08-23 22:54:19,944 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-23 22:54:19,945 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:54:19,945 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-23 22:54:19,945 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)] === [2023-08-23 22:54:19,945 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:54:19,946 INFO L85 PathProgramCache]: Analyzing trace with hash -1768402372, now seen corresponding path program 1 times [2023-08-23 22:54:19,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:54:19,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575583634] [2023-08-23 22:54:19,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:54:19,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:54:19,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:54:20,009 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 22:54:20,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 22:54:20,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575583634] [2023-08-23 22:54:20,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575583634] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-23 22:54:20,010 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-23 22:54:20,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-23 22:54:20,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212425649] [2023-08-23 22:54:20,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-23 22:54:20,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-23 22:54:20,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 22:54:20,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-23 22:54:20,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-23 22:54:20,012 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 145 [2023-08-23 22:54:20,012 INFO L103 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) [2023-08-23 22:54:20,012 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 22:54:20,012 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 145 [2023-08-23 22:54:20,012 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 22:54:20,370 INFO L124 PetriNetUnfolderBase]: 2724/4247 cut-off events. [2023-08-23 22:54:20,371 INFO L125 PetriNetUnfolderBase]: For 29/29 co-relation queries the response was YES. [2023-08-23 22:54:20,376 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. [2023-08-23 22:54:20,390 INFO L140 encePairwiseOnDemand]: 133/145 looper letters, 59 selfloop transitions, 6 changer transitions 0/68 dead transitions. [2023-08-23 22:54:20,391 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 68 transitions, 283 flow [2023-08-23 22:54:20,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-23 22:54:20,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-23 22:54:20,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 236 transitions. [2023-08-23 22:54:20,393 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.542528735632184 [2023-08-23 22:54:20,393 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 236 transitions. [2023-08-23 22:54:20,393 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 236 transitions. [2023-08-23 22:54:20,393 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 22:54:20,394 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 236 transitions. [2023-08-23 22:54:20,394 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) [2023-08-23 22:54:20,396 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) [2023-08-23 22:54:20,396 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) [2023-08-23 22:54:20,396 INFO L175 Difference]: Start difference. First operand has 43 places, 44 transitions, 100 flow. Second operand 3 states and 236 transitions. [2023-08-23 22:54:20,396 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 68 transitions, 283 flow [2023-08-23 22:54:20,397 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 68 transitions, 281 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-08-23 22:54:20,398 INFO L231 Difference]: Finished difference. Result has 44 places, 44 transitions, 140 flow [2023-08-23 22:54:20,398 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} [2023-08-23 22:54:20,399 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 1 predicate places. [2023-08-23 22:54:20,399 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 44 transitions, 140 flow [2023-08-23 22:54:20,399 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) [2023-08-23 22:54:20,400 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:54:20,400 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-23 22:54:20,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-23 22:54:20,400 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)] === [2023-08-23 22:54:20,400 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:54:20,400 INFO L85 PathProgramCache]: Analyzing trace with hash -1537516535, now seen corresponding path program 1 times [2023-08-23 22:54:20,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:54:20,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057106199] [2023-08-23 22:54:20,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:54:20,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:54:20,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-23 22:54:20,414 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-23 22:54:20,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-23 22:54:20,425 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-23 22:54:20,425 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-23 22:54:20,425 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2023-08-23 22:54:20,426 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2023-08-23 22:54:20,426 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2023-08-23 22:54:20,426 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2023-08-23 22:54:20,426 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2023-08-23 22:54:20,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-23 22:54:20,426 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-23 22:54:20,427 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-23 22:54:20,427 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-23 22:54:20,445 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-23 22:54:20,447 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 104 places, 106 transitions, 233 flow [2023-08-23 22:54:20,464 INFO L124 PetriNetUnfolderBase]: 18/218 cut-off events. [2023-08-23 22:54:20,464 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-08-23 22:54:20,466 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. [2023-08-23 22:54:20,466 INFO L82 GeneralOperation]: Start removeDead. Operand has 104 places, 106 transitions, 233 flow [2023-08-23 22:54:20,467 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 104 places, 106 transitions, 233 flow [2023-08-23 22:54:20,467 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-23 22:54:20,467 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 104 places, 106 transitions, 233 flow [2023-08-23 22:54:20,467 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 104 places, 106 transitions, 233 flow [2023-08-23 22:54:20,468 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 104 places, 106 transitions, 233 flow [2023-08-23 22:54:20,483 INFO L124 PetriNetUnfolderBase]: 18/218 cut-off events. [2023-08-23 22:54:20,484 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-08-23 22:54:20,485 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. [2023-08-23 22:54:20,489 INFO L119 LiptonReduction]: Number of co-enabled transitions 5814 [2023-08-23 22:54:21,682 INFO L134 LiptonReduction]: Checked pairs total: 18567 [2023-08-23 22:54:21,682 INFO L136 LiptonReduction]: Total number of compositions: 65 [2023-08-23 22:54:21,684 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-23 22:54:21,685 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;@220c736a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-23 22:54:21,685 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-08-23 22:54:21,687 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-23 22:54:21,687 INFO L124 PetriNetUnfolderBase]: 3/19 cut-off events. [2023-08-23 22:54:21,687 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-23 22:54:21,688 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:54:21,688 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-23 22:54:21,688 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)] === [2023-08-23 22:54:21,688 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:54:21,688 INFO L85 PathProgramCache]: Analyzing trace with hash -472896841, now seen corresponding path program 1 times [2023-08-23 22:54:21,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:54:21,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019821352] [2023-08-23 22:54:21,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:54:21,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:54:21,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:54:21,791 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 22:54:21,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 22:54:21,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019821352] [2023-08-23 22:54:21,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019821352] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-23 22:54:21,796 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-23 22:54:21,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-23 22:54:21,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364652915] [2023-08-23 22:54:21,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-23 22:54:21,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-23 22:54:21,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 22:54:21,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-23 22:54:21,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-23 22:54:21,801 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 171 [2023-08-23 22:54:21,801 INFO L103 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) [2023-08-23 22:54:21,801 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 22:54:21,801 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 171 [2023-08-23 22:54:21,801 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 22:54:25,955 INFO L124 PetriNetUnfolderBase]: 49982/68453 cut-off events. [2023-08-23 22:54:25,956 INFO L125 PetriNetUnfolderBase]: For 715/715 co-relation queries the response was YES. [2023-08-23 22:54:26,035 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. [2023-08-23 22:54:26,336 INFO L140 encePairwiseOnDemand]: 155/171 looper letters, 79 selfloop transitions, 8 changer transitions 0/90 dead transitions. [2023-08-23 22:54:26,336 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 90 transitions, 387 flow [2023-08-23 22:54:26,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-23 22:54:26,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-23 22:54:26,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 281 transitions. [2023-08-23 22:54:26,343 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5477582846003899 [2023-08-23 22:54:26,343 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 281 transitions. [2023-08-23 22:54:26,343 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 281 transitions. [2023-08-23 22:54:26,344 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 22:54:26,344 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 281 transitions. [2023-08-23 22:54:26,345 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) [2023-08-23 22:54:26,347 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) [2023-08-23 22:54:26,348 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) [2023-08-23 22:54:26,348 INFO L175 Difference]: Start difference. First operand has 55 places, 55 transitions, 131 flow. Second operand 3 states and 281 transitions. [2023-08-23 22:54:26,348 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 90 transitions, 387 flow [2023-08-23 22:54:26,353 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 90 transitions, 379 flow, removed 4 selfloop flow, removed 0 redundant places. [2023-08-23 22:54:26,354 INFO L231 Difference]: Finished difference. Result has 57 places, 58 transitions, 189 flow [2023-08-23 22:54:26,354 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} [2023-08-23 22:54:26,356 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 2 predicate places. [2023-08-23 22:54:26,358 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 58 transitions, 189 flow [2023-08-23 22:54:26,358 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) [2023-08-23 22:54:26,358 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:54:26,359 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-08-23 22:54:26,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-23 22:54:26,359 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)] === [2023-08-23 22:54:26,359 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:54:26,359 INFO L85 PathProgramCache]: Analyzing trace with hash 1245068768, now seen corresponding path program 1 times [2023-08-23 22:54:26,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:54:26,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113332284] [2023-08-23 22:54:26,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:54:26,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:54:26,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-23 22:54:26,382 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-23 22:54:26,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-23 22:54:26,399 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-23 22:54:26,400 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-23 22:54:26,400 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2023-08-23 22:54:26,400 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2023-08-23 22:54:26,401 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2023-08-23 22:54:26,402 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2023-08-23 22:54:26,402 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2023-08-23 22:54:26,402 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2023-08-23 22:54:26,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-23 22:54:26,402 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-23 22:54:26,403 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-23 22:54:26,403 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-08-23 22:54:26,437 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-23 22:54:26,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 122 places, 124 transitions, 280 flow [2023-08-23 22:54:26,474 INFO L124 PetriNetUnfolderBase]: 23/274 cut-off events. [2023-08-23 22:54:26,475 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-08-23 22:54:26,476 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. [2023-08-23 22:54:26,476 INFO L82 GeneralOperation]: Start removeDead. Operand has 122 places, 124 transitions, 280 flow [2023-08-23 22:54:26,478 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 122 places, 124 transitions, 280 flow [2023-08-23 22:54:26,478 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-23 22:54:26,478 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 122 places, 124 transitions, 280 flow [2023-08-23 22:54:26,478 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 122 places, 124 transitions, 280 flow [2023-08-23 22:54:26,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 122 places, 124 transitions, 280 flow [2023-08-23 22:54:26,501 INFO L124 PetriNetUnfolderBase]: 23/274 cut-off events. [2023-08-23 22:54:26,501 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-08-23 22:54:26,502 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. [2023-08-23 22:54:26,509 INFO L119 LiptonReduction]: Number of co-enabled transitions 8976 [2023-08-23 22:54:27,883 INFO L134 LiptonReduction]: Checked pairs total: 31692 [2023-08-23 22:54:27,883 INFO L136 LiptonReduction]: Total number of compositions: 74 [2023-08-23 22:54:27,885 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-23 22:54:27,887 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;@220c736a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-23 22:54:27,887 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-08-23 22:54:27,889 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-23 22:54:27,889 INFO L124 PetriNetUnfolderBase]: 3/19 cut-off events. [2023-08-23 22:54:27,890 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-23 22:54:27,890 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:54:27,890 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-23 22:54:27,890 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)] === [2023-08-23 22:54:27,890 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:54:27,890 INFO L85 PathProgramCache]: Analyzing trace with hash 1649960361, now seen corresponding path program 1 times [2023-08-23 22:54:27,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:54:27,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069003567] [2023-08-23 22:54:27,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:54:27,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:54:27,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:54:27,932 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 22:54:27,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 22:54:27,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069003567] [2023-08-23 22:54:27,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069003567] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-23 22:54:27,933 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-23 22:54:27,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-23 22:54:27,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500680082] [2023-08-23 22:54:27,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-23 22:54:27,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-23 22:54:27,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 22:54:27,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-23 22:54:27,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-23 22:54:27,935 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 198 [2023-08-23 22:54:27,935 INFO L103 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) [2023-08-23 22:54:27,936 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 22:54:27,936 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 198 [2023-08-23 22:54:27,936 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 22:55:17,162 INFO L124 PetriNetUnfolderBase]: 702540/894149 cut-off events. [2023-08-23 22:55:17,162 INFO L125 PetriNetUnfolderBase]: For 13777/13777 co-relation queries the response was YES. [2023-08-23 22:55:18,195 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. [2023-08-23 22:55:21,219 INFO L140 encePairwiseOnDemand]: 178/198 looper letters, 97 selfloop transitions, 10 changer transitions 0/110 dead transitions. [2023-08-23 22:55:21,220 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 110 transitions, 487 flow [2023-08-23 22:55:21,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-23 22:55:21,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-23 22:55:21,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 326 transitions. [2023-08-23 22:55:21,221 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5488215488215489 [2023-08-23 22:55:21,221 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 326 transitions. [2023-08-23 22:55:21,222 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 326 transitions. [2023-08-23 22:55:21,222 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 22:55:21,222 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 326 transitions. [2023-08-23 22:55:21,223 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) [2023-08-23 22:55:21,224 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) [2023-08-23 22:55:21,224 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) [2023-08-23 22:55:21,225 INFO L175 Difference]: Start difference. First operand has 69 places, 70 transitions, 172 flow. Second operand 3 states and 326 transitions. [2023-08-23 22:55:21,225 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 110 transitions, 487 flow [2023-08-23 22:55:21,236 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 110 transitions, 469 flow, removed 9 selfloop flow, removed 0 redundant places. [2023-08-23 22:55:21,238 INFO L231 Difference]: Finished difference. Result has 68 places, 70 transitions, 230 flow [2023-08-23 22:55:21,238 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} [2023-08-23 22:55:21,239 INFO L281 CegarLoopForPetriNet]: 69 programPoint places, -1 predicate places. [2023-08-23 22:55:21,239 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 70 transitions, 230 flow [2023-08-23 22:55:21,239 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) [2023-08-23 22:55:21,239 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:55:21,239 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-23 22:55:21,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-23 22:55:21,240 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-23 22:55:21,240 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:55:21,240 INFO L85 PathProgramCache]: Analyzing trace with hash -710619570, now seen corresponding path program 1 times [2023-08-23 22:55:21,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:55:21,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147944882] [2023-08-23 22:55:21,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:55:21,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:55:21,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:55:21,401 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-23 22:55:21,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 22:55:21,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147944882] [2023-08-23 22:55:21,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147944882] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-23 22:55:21,402 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-23 22:55:21,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-23 22:55:21,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985129071] [2023-08-23 22:55:21,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-23 22:55:21,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-23 22:55:21,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 22:55:21,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-23 22:55:21,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-23 22:55:21,403 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 198 [2023-08-23 22:55:21,404 INFO L103 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) [2023-08-23 22:55:21,404 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 22:55:21,404 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 198 [2023-08-23 22:55:21,404 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 22:55:40,217 INFO L292 olderBase$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]) [2023-08-23 22:55:40,217 INFO L294 olderBase$Statistics]: this new event has 49 ancestors and is cut-off event [2023-08-23 22:55:40,217 INFO L297 olderBase$Statistics]: existing Event has 49 ancestors and is cut-off event [2023-08-23 22:55:40,217 INFO L297 olderBase$Statistics]: existing Event has 49 ancestors and is cut-off event [2023-08-23 22:55:40,218 INFO L297 olderBase$Statistics]: existing Event has 49 ancestors and is cut-off event [2023-08-23 22:55:40,359 INFO L292 olderBase$Statistics]: inserting event number 4 for the transition-marking pair ([860] L718-->thr1Err0ASSERT_VIOLATIONERROR_FUNCTION: Formula: (not (= (mod v_~c~0_118 4294967296) 1)) InVars {~c~0=v_~c~0_118} OutVars{~c~0=v_~c~0_118} AuxVars[] AssignedVars[][131], [34#thr1Err0ASSERT_VIOLATIONERROR_FUNCTIONtrue, Black: 127#(= ~c~0 1), 74#thr1EXITtrue, thr1Thread1of4ForFork0InUse, 78#thr1EXITtrue, thr1Thread2of4ForFork0InUse, 131#true, thr1Thread3of4ForFork0InUse, 56#L719true, thr1Thread4of4ForFork0InUse, 54#L719true, 125#true]) [2023-08-23 22:55:40,360 INFO L294 olderBase$Statistics]: this new event has 50 ancestors and is cut-off event [2023-08-23 22:55:40,360 INFO L297 olderBase$Statistics]: existing Event has 50 ancestors and is cut-off event [2023-08-23 22:55:40,360 INFO L297 olderBase$Statistics]: existing Event has 50 ancestors and is cut-off event [2023-08-23 22:55:40,360 INFO L297 olderBase$Statistics]: existing Event has 50 ancestors and is cut-off event [2023-08-23 22:55:40,467 INFO L292 olderBase$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]) [2023-08-23 22:55:40,468 INFO L294 olderBase$Statistics]: this new event has 51 ancestors and is cut-off event [2023-08-23 22:55:40,468 INFO L297 olderBase$Statistics]: existing Event has 51 ancestors and is cut-off event [2023-08-23 22:55:40,468 INFO L297 olderBase$Statistics]: existing Event has 51 ancestors and is cut-off event [2023-08-23 22:55:40,468 INFO L297 olderBase$Statistics]: existing Event has 51 ancestors and is cut-off event [2023-08-23 22:55:40,537 INFO L292 olderBase$Statistics]: inserting event number 4 for the transition-marking pair ([825] L719-->L716-2: Formula: (and (= |v_thr1Thread3of4ForFork0_#res#1.base_5| 0) (= v_~s~0_86 (+ v_~s~0_87 1)) (= |v_thr1Thread3of4ForFork0_#res#1.offset_5| 0)) InVars {~s~0=v_~s~0_87} OutVars{thr1Thread3of4ForFork0_#res#1.offset=|v_thr1Thread3of4ForFork0_#res#1.offset_5|, thr1Thread3of4ForFork0_#t~post5#1=|v_thr1Thread3of4ForFork0_#t~post5#1_5|, thr1Thread3of4ForFork0_#res#1.base=|v_thr1Thread3of4ForFork0_#res#1.base_5|, ~s~0=v_~s~0_86} AuxVars[] AssignedVars[thr1Thread3of4ForFork0_#res#1.offset, thr1Thread3of4ForFork0_#t~post5#1, thr1Thread3of4ForFork0_#res#1.base, ~s~0][124], [Black: 127#(= ~c~0 1), 42#L716-2true, 74#thr1EXITtrue, thr1Thread1of4ForFork0InUse, 78#thr1EXITtrue, thr1Thread2of4ForFork0InUse, 131#true, thr1Thread3of4ForFork0InUse, 56#L719true, thr1Thread4of4ForFork0InUse, 54#L719true, 125#true]) [2023-08-23 22:55:40,538 INFO L294 olderBase$Statistics]: this new event has 52 ancestors and is cut-off event [2023-08-23 22:55:40,538 INFO L297 olderBase$Statistics]: existing Event has 52 ancestors and is cut-off event [2023-08-23 22:55:40,538 INFO L297 olderBase$Statistics]: existing Event has 52 ancestors and is cut-off event [2023-08-23 22:55:40,538 INFO L297 olderBase$Statistics]: existing Event has 52 ancestors and is cut-off event [2023-08-23 22:55:40,606 INFO L124 PetriNetUnfolderBase]: 214012/314249 cut-off events. [2023-08-23 22:55:40,606 INFO L125 PetriNetUnfolderBase]: For 64987/82854 co-relation queries the response was YES. [2023-08-23 22:55:41,427 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. [2023-08-23 22:55:42,891 INFO L140 encePairwiseOnDemand]: 185/198 looper letters, 84 selfloop transitions, 25 changer transitions 0/137 dead transitions. [2023-08-23 22:55:42,891 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 137 transitions, 622 flow [2023-08-23 22:55:42,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-23 22:55:42,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-23 22:55:42,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 515 transitions. [2023-08-23 22:55:42,893 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5202020202020202 [2023-08-23 22:55:42,893 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 515 transitions. [2023-08-23 22:55:42,893 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 515 transitions. [2023-08-23 22:55:42,894 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 22:55:42,894 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 515 transitions. [2023-08-23 22:55:42,895 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) [2023-08-23 22:55:42,896 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) [2023-08-23 22:55:42,897 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) [2023-08-23 22:55:42,897 INFO L175 Difference]: Start difference. First operand has 68 places, 70 transitions, 230 flow. Second operand 5 states and 515 transitions. [2023-08-23 22:55:42,897 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 137 transitions, 622 flow [2023-08-23 22:55:43,085 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 137 transitions, 602 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-23 22:55:43,087 INFO L231 Difference]: Finished difference. Result has 72 places, 94 transitions, 357 flow [2023-08-23 22:55:43,087 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} [2023-08-23 22:55:43,088 INFO L281 CegarLoopForPetriNet]: 69 programPoint places, 3 predicate places. [2023-08-23 22:55:43,088 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 94 transitions, 357 flow [2023-08-23 22:55:43,088 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) [2023-08-23 22:55:43,088 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:55:43,088 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-23 22:55:43,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-23 22:55:43,088 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-23 22:55:43,089 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:55:43,089 INFO L85 PathProgramCache]: Analyzing trace with hash -722332370, now seen corresponding path program 2 times [2023-08-23 22:55:43,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:55:43,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558274503] [2023-08-23 22:55:43,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:55:43,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:55:43,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:55:43,231 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-23 22:55:43,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 22:55:43,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558274503] [2023-08-23 22:55:43,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558274503] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-23 22:55:43,232 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-23 22:55:43,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-23 22:55:43,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251791865] [2023-08-23 22:55:43,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-23 22:55:43,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-23 22:55:43,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 22:55:43,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-23 22:55:43,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-23 22:55:43,233 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 198 [2023-08-23 22:55:43,234 INFO L103 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) [2023-08-23 22:55:43,234 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 22:55:43,234 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 198 [2023-08-23 22:55:43,234 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 22:56:04,307 INFO L124 PetriNetUnfolderBase]: 214472/314654 cut-off events. [2023-08-23 22:56:04,307 INFO L125 PetriNetUnfolderBase]: For 97203/128704 co-relation queries the response was YES. [2023-08-23 22:56:05,481 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. [2023-08-23 22:56:06,741 INFO L140 encePairwiseOnDemand]: 186/198 looper letters, 91 selfloop transitions, 24 changer transitions 0/143 dead transitions. [2023-08-23 22:56:06,741 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 143 transitions, 739 flow [2023-08-23 22:56:06,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-23 22:56:06,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-23 22:56:06,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 507 transitions. [2023-08-23 22:56:06,743 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5121212121212121 [2023-08-23 22:56:06,743 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 507 transitions. [2023-08-23 22:56:06,743 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 507 transitions. [2023-08-23 22:56:06,744 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 22:56:06,744 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 507 transitions. [2023-08-23 22:56:06,745 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) [2023-08-23 22:56:06,747 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) [2023-08-23 22:56:06,747 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) [2023-08-23 22:56:06,747 INFO L175 Difference]: Start difference. First operand has 72 places, 94 transitions, 357 flow. Second operand 5 states and 507 transitions. [2023-08-23 22:56:06,747 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 143 transitions, 739 flow [2023-08-23 22:56:06,765 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 143 transitions, 739 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-23 22:56:06,768 INFO L231 Difference]: Finished difference. Result has 77 places, 102 transitions, 464 flow [2023-08-23 22:56:06,768 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} [2023-08-23 22:56:06,768 INFO L281 CegarLoopForPetriNet]: 69 programPoint places, 8 predicate places. [2023-08-23 22:56:06,769 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 102 transitions, 464 flow [2023-08-23 22:56:06,769 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) [2023-08-23 22:56:06,769 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:56:06,769 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-23 22:56:06,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-23 22:56:06,769 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-23 22:56:06,770 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:56:06,770 INFO L85 PathProgramCache]: Analyzing trace with hash -1755268447, now seen corresponding path program 1 times [2023-08-23 22:56:06,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:56:06,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810442789] [2023-08-23 22:56:06,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:56:06,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:56:06,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:56:06,931 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-23 22:56:06,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 22:56:06,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810442789] [2023-08-23 22:56:06,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810442789] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-23 22:56:06,933 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-23 22:56:06,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-23 22:56:06,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123901581] [2023-08-23 22:56:06,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-23 22:56:06,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-23 22:56:06,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 22:56:06,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-23 22:56:06,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-23 22:56:06,936 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 198 [2023-08-23 22:56:06,936 INFO L103 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) [2023-08-23 22:56:06,936 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 22:56:06,936 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 198 [2023-08-23 22:56:06,936 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 22:56:28,340 INFO L292 olderBase$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]) [2023-08-23 22:56:28,341 INFO L294 olderBase$Statistics]: this new event has 49 ancestors and is cut-off event [2023-08-23 22:56:28,341 INFO L297 olderBase$Statistics]: existing Event has 49 ancestors and is cut-off event [2023-08-23 22:56:28,341 INFO L297 olderBase$Statistics]: existing Event has 49 ancestors and is cut-off event [2023-08-23 22:56:28,341 INFO L297 olderBase$Statistics]: existing Event has 49 ancestors and is cut-off event [2023-08-23 22:56:28,489 INFO L292 olderBase$Statistics]: inserting event number 4 for the transition-marking pair ([860] L718-->thr1Err0ASSERT_VIOLATIONERROR_FUNCTION: Formula: (not (= (mod v_~c~0_118 4294967296) 1)) InVars {~c~0=v_~c~0_118} OutVars{~c~0=v_~c~0_118} AuxVars[] AssignedVars[][145], [Black: 127#(= ~c~0 1), 139#true, Black: 135#(and (<= 1 (select (select |#memory_int| |thr1Thread1of4ForFork0_~#l~0#1.base|) |thr1Thread1of4ForFork0_~#l~0#1.offset|)) (< (div (select (select |#memory_int| |thr1Thread1of4ForFork0_~#l~0#1.base|) |thr1Thread1of4ForFork0_~#l~0#1.offset|) 4294967296) 1) (= ~s~0 0)), 131#true, 56#L719true, Black: 134#(and (<= ~t~0 1) (<= 1 ~t~0) (= ~s~0 0)), 54#L719true, 146#true, 34#thr1Err0ASSERT_VIOLATIONERROR_FUNCTIONtrue, Black: 143#(and (<= 1 (select (select |#memory_int| |ULTIMATE.start_thr1_~#l~0#1.base|) |ULTIMATE.start_thr1_~#l~0#1.offset|)) (< (div (select (select |#memory_int| |ULTIMATE.start_thr1_~#l~0#1.base|) |ULTIMATE.start_thr1_~#l~0#1.offset|) 4294967296) 1) (= ~s~0 0)), 74#thr1EXITtrue, thr1Thread1of4ForFork0InUse, 78#thr1EXITtrue, thr1Thread2of4ForFork0InUse, thr1Thread3of4ForFork0InUse, thr1Thread4of4ForFork0InUse]) [2023-08-23 22:56:28,489 INFO L294 olderBase$Statistics]: this new event has 50 ancestors and is cut-off event [2023-08-23 22:56:28,489 INFO L297 olderBase$Statistics]: existing Event has 50 ancestors and is cut-off event [2023-08-23 22:56:28,489 INFO L297 olderBase$Statistics]: existing Event has 50 ancestors and is cut-off event [2023-08-23 22:56:28,489 INFO L297 olderBase$Statistics]: existing Event has 50 ancestors and is cut-off event [2023-08-23 22:56:28,601 INFO L292 olderBase$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]) [2023-08-23 22:56:28,601 INFO L294 olderBase$Statistics]: this new event has 51 ancestors and is cut-off event [2023-08-23 22:56:28,601 INFO L297 olderBase$Statistics]: existing Event has 51 ancestors and is cut-off event [2023-08-23 22:56:28,601 INFO L297 olderBase$Statistics]: existing Event has 51 ancestors and is cut-off event [2023-08-23 22:56:28,601 INFO L297 olderBase$Statistics]: existing Event has 51 ancestors and is cut-off event [2023-08-23 22:56:28,664 INFO L292 olderBase$Statistics]: inserting event number 4 for the transition-marking pair ([825] L719-->L716-2: Formula: (and (= |v_thr1Thread3of4ForFork0_#res#1.base_5| 0) (= v_~s~0_86 (+ v_~s~0_87 1)) (= |v_thr1Thread3of4ForFork0_#res#1.offset_5| 0)) InVars {~s~0=v_~s~0_87} OutVars{thr1Thread3of4ForFork0_#res#1.offset=|v_thr1Thread3of4ForFork0_#res#1.offset_5|, thr1Thread3of4ForFork0_#t~post5#1=|v_thr1Thread3of4ForFork0_#t~post5#1_5|, thr1Thread3of4ForFork0_#res#1.base=|v_thr1Thread3of4ForFork0_#res#1.base_5|, ~s~0=v_~s~0_86} AuxVars[] AssignedVars[thr1Thread3of4ForFork0_#res#1.offset, thr1Thread3of4ForFork0_#t~post5#1, thr1Thread3of4ForFork0_#res#1.base, ~s~0][130], [Black: 127#(= ~c~0 1), 139#true, 42#L716-2true, Black: 135#(and (<= 1 (select (select |#memory_int| |thr1Thread1of4ForFork0_~#l~0#1.base|) |thr1Thread1of4ForFork0_~#l~0#1.offset|)) (< (div (select (select |#memory_int| |thr1Thread1of4ForFork0_~#l~0#1.base|) |thr1Thread1of4ForFork0_~#l~0#1.offset|) 4294967296) 1) (= ~s~0 0)), 131#true, 56#L719true, Black: 134#(and (<= ~t~0 1) (<= 1 ~t~0) (= ~s~0 0)), 54#L719true, 146#true, Black: 143#(and (<= 1 (select (select |#memory_int| |ULTIMATE.start_thr1_~#l~0#1.base|) |ULTIMATE.start_thr1_~#l~0#1.offset|)) (< (div (select (select |#memory_int| |ULTIMATE.start_thr1_~#l~0#1.base|) |ULTIMATE.start_thr1_~#l~0#1.offset|) 4294967296) 1) (= ~s~0 0)), 74#thr1EXITtrue, thr1Thread1of4ForFork0InUse, thr1Thread2of4ForFork0InUse, 78#thr1EXITtrue, thr1Thread3of4ForFork0InUse, thr1Thread4of4ForFork0InUse]) [2023-08-23 22:56:28,664 INFO L294 olderBase$Statistics]: this new event has 52 ancestors and is cut-off event [2023-08-23 22:56:28,664 INFO L297 olderBase$Statistics]: existing Event has 52 ancestors and is cut-off event [2023-08-23 22:56:28,664 INFO L297 olderBase$Statistics]: existing Event has 52 ancestors and is cut-off event [2023-08-23 22:56:28,664 INFO L297 olderBase$Statistics]: existing Event has 52 ancestors and is cut-off event [2023-08-23 22:56:28,753 INFO L124 PetriNetUnfolderBase]: 214920/316110 cut-off events. [2023-08-23 22:56:28,753 INFO L125 PetriNetUnfolderBase]: For 191155/234750 co-relation queries the response was YES. [2023-08-23 22:56:29,737 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. [2023-08-23 22:56:31,239 INFO L140 encePairwiseOnDemand]: 185/198 looper letters, 101 selfloop transitions, 25 changer transitions 0/154 dead transitions. [2023-08-23 22:56:31,239 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 154 transitions, 902 flow [2023-08-23 22:56:31,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-23 22:56:31,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-23 22:56:31,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 515 transitions. [2023-08-23 22:56:31,241 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5202020202020202 [2023-08-23 22:56:31,241 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 515 transitions. [2023-08-23 22:56:31,241 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 515 transitions. [2023-08-23 22:56:31,241 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 22:56:31,241 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 515 transitions. [2023-08-23 22:56:31,242 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) [2023-08-23 22:56:31,244 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) [2023-08-23 22:56:31,244 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) [2023-08-23 22:56:31,244 INFO L175 Difference]: Start difference. First operand has 77 places, 102 transitions, 464 flow. Second operand 5 states and 515 transitions. [2023-08-23 22:56:31,244 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 154 transitions, 902 flow [2023-08-23 22:56:31,288 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 154 transitions, 847 flow, removed 8 selfloop flow, removed 3 redundant places. [2023-08-23 22:56:31,290 INFO L231 Difference]: Finished difference. Result has 79 places, 111 transitions, 537 flow [2023-08-23 22:56:31,290 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} [2023-08-23 22:56:31,291 INFO L281 CegarLoopForPetriNet]: 69 programPoint places, 10 predicate places. [2023-08-23 22:56:31,291 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 111 transitions, 537 flow [2023-08-23 22:56:31,291 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) [2023-08-23 22:56:31,292 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:56:31,292 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2023-08-23 22:56:31,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-23 22:56:31,292 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)] === [2023-08-23 22:56:31,292 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:56:31,292 INFO L85 PathProgramCache]: Analyzing trace with hash -925350526, now seen corresponding path program 1 times [2023-08-23 22:56:31,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:56:31,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681509315] [2023-08-23 22:56:31,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:56:31,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:56:31,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-23 22:56:31,304 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-23 22:56:31,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-23 22:56:31,314 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-23 22:56:31,314 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-23 22:56:31,314 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2023-08-23 22:56:31,315 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 7 remaining) [2023-08-23 22:56:31,315 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (4 of 7 remaining) [2023-08-23 22:56:31,315 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 7 remaining) [2023-08-23 22:56:31,315 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 7 remaining) [2023-08-23 22:56:31,315 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 7 remaining) [2023-08-23 22:56:31,315 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 7 remaining) [2023-08-23 22:56:31,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-23 22:56:31,315 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1] [2023-08-23 22:56:31,316 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-23 22:56:31,316 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-08-23 22:56:31,344 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-23 22:56:31,348 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 140 places, 142 transitions, 329 flow [2023-08-23 22:56:31,372 INFO L124 PetriNetUnfolderBase]: 28/330 cut-off events. [2023-08-23 22:56:31,372 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2023-08-23 22:56:31,374 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. [2023-08-23 22:56:31,374 INFO L82 GeneralOperation]: Start removeDead. Operand has 140 places, 142 transitions, 329 flow [2023-08-23 22:56:31,375 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 140 places, 142 transitions, 329 flow [2023-08-23 22:56:31,375 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-23 22:56:31,375 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 140 places, 142 transitions, 329 flow [2023-08-23 22:56:31,376 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 140 places, 142 transitions, 329 flow [2023-08-23 22:56:31,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 140 places, 142 transitions, 329 flow [2023-08-23 22:56:31,399 INFO L124 PetriNetUnfolderBase]: 28/330 cut-off events. [2023-08-23 22:56:31,399 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2023-08-23 22:56:31,401 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. [2023-08-23 22:56:31,412 INFO L119 LiptonReduction]: Number of co-enabled transitions 12750 [2023-08-23 22:56:32,765 INFO L134 LiptonReduction]: Checked pairs total: 53630 [2023-08-23 22:56:32,765 INFO L136 LiptonReduction]: Total number of compositions: 82 [2023-08-23 22:56:32,766 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-23 22:56:32,767 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;@220c736a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-23 22:56:32,767 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2023-08-23 22:56:32,769 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-23 22:56:32,769 INFO L124 PetriNetUnfolderBase]: 3/19 cut-off events. [2023-08-23 22:56:32,769 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-23 22:56:32,769 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:56:32,769 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-23 22:56:32,769 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)] === [2023-08-23 22:56:32,769 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:56:32,770 INFO L85 PathProgramCache]: Analyzing trace with hash 246127397, now seen corresponding path program 1 times [2023-08-23 22:56:32,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:56:32,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429052402] [2023-08-23 22:56:32,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:56:32,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:56:32,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:56:32,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 22:56:32,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 22:56:32,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429052402] [2023-08-23 22:56:32,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429052402] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-23 22:56:32,805 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-23 22:56:32,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-23 22:56:32,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702918295] [2023-08-23 22:56:32,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-23 22:56:32,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-23 22:56:32,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 22:56:32,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-23 22:56:32,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-23 22:56:32,807 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 224 [2023-08-23 22:56:32,807 INFO L103 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) [2023-08-23 22:56:32,807 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 22:56:32,807 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 224 [2023-08-23 22:56:32,807 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand