/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.order.of.the.error.locations.to.be.checked PROGRAM_FIRST -tc /storage/repos/CAV22/benchmarks/AutomizerCInline.xml -i /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-more-queue-add-3-nl.wvr_bound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 09:30:51,593 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 09:30:51,673 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 09:30:51,678 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 09:30:51,679 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 09:30:51,679 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 09:30:51,680 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 09:30:51,708 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 09:30:51,709 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 09:30:51,712 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 09:30:51,712 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 09:30:51,713 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 09:30:51,713 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 09:30:51,714 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 09:30:51,714 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 09:30:51,714 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 09:30:51,715 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 09:30:51,715 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 09:30:51,715 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 09:30:51,715 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 09:30:51,715 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 09:30:51,716 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 09:30:51,716 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 09:30:51,716 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 09:30:51,716 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 09:30:51,717 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 09:30:51,717 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 09:30:51,717 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 09:30:51,717 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 09:30:51,717 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 09:30:51,718 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 09:30:51,718 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 09:30:51,718 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 09:30:51,718 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 09:30:51,718 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 09:30:51,718 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 09:30:51,719 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 09:30:51,719 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 09:30:51,719 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 09:30:51,719 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 09:30:51,719 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 09:30:51,719 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-04 09:30:51,896 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 09:30:51,921 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 09:30:51,923 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 09:30:51,924 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 09:30:51,924 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 09:30:51,925 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-more-queue-add-3-nl.wvr_bound2.c [2023-08-04 09:30:53,082 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 09:30:53,277 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 09:30:53,277 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-more-queue-add-3-nl.wvr_bound2.c [2023-08-04 09:30:53,284 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ea559d174/eae4e99f933548bb8408ba7697a7c3ff/FLAG8aedfb36f [2023-08-04 09:30:53,295 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ea559d174/eae4e99f933548bb8408ba7697a7c3ff [2023-08-04 09:30:53,297 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 09:30:53,298 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 09:30:53,299 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 09:30:53,299 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 09:30:53,302 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 09:30:53,302 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 09:30:53" (1/1) ... [2023-08-04 09:30:53,303 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@21539c07 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:30:53, skipping insertion in model container [2023-08-04 09:30:53,303 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 09:30:53" (1/1) ... [2023-08-04 09:30:53,323 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 09:30:53,456 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-more-queue-add-3-nl.wvr_bound2.c[3858,3871] [2023-08-04 09:30:53,460 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 09:30:53,468 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 09:30:53,491 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-more-queue-add-3-nl.wvr_bound2.c[3858,3871] [2023-08-04 09:30:53,493 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 09:30:53,500 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 09:30:53,500 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 09:30:53,506 INFO L206 MainTranslator]: Completed translation [2023-08-04 09:30:53,506 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:30:53 WrapperNode [2023-08-04 09:30:53,506 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 09:30:53,507 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 09:30:53,507 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 09:30:53,507 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 09:30:53,513 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:30:53" (1/1) ... [2023-08-04 09:30:53,521 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:30:53" (1/1) ... [2023-08-04 09:30:53,550 INFO L138 Inliner]: procedures = 26, calls = 55, calls flagged for inlining = 16, calls inlined = 18, statements flattened = 313 [2023-08-04 09:30:53,550 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 09:30:53,551 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 09:30:53,551 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 09:30:53,551 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 09:30:53,557 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:30:53" (1/1) ... [2023-08-04 09:30:53,558 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:30:53" (1/1) ... [2023-08-04 09:30:53,562 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:30:53" (1/1) ... [2023-08-04 09:30:53,562 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:30:53" (1/1) ... [2023-08-04 09:30:53,569 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:30:53" (1/1) ... [2023-08-04 09:30:53,588 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:30:53" (1/1) ... [2023-08-04 09:30:53,590 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:30:53" (1/1) ... [2023-08-04 09:30:53,591 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:30:53" (1/1) ... [2023-08-04 09:30:53,594 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 09:30:53,595 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 09:30:53,595 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 09:30:53,595 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 09:30:53,596 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:30:53" (1/1) ... [2023-08-04 09:30:53,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 09:30:53,612 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:30:53,623 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) [2023-08-04 09:30:53,633 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 [2023-08-04 09:30:53,658 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 09:30:53,659 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 09:30:53,659 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 09:30:53,659 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 09:30:53,660 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-04 09:30:53,660 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-04 09:30:53,660 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-04 09:30:53,660 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-04 09:30:53,660 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-04 09:30:53,662 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-04 09:30:53,662 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 09:30:53,662 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-04 09:30:53,663 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-04 09:30:53,663 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-04 09:30:53,663 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 09:30:53,663 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 09:30:53,663 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 09:30:53,664 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-04 09:30:53,788 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 09:30:53,789 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 09:30:54,225 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 09:30:54,334 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 09:30:54,334 INFO L302 CfgBuilder]: Removed 11 assume(true) statements. [2023-08-04 09:30:54,339 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 09:30:54 BoogieIcfgContainer [2023-08-04 09:30:54,339 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 09:30:54,341 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 09:30:54,342 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 09:30:54,345 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 09:30:54,345 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 09:30:53" (1/3) ... [2023-08-04 09:30:54,346 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@145c4ac3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 09:30:54, skipping insertion in model container [2023-08-04 09:30:54,347 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:30:53" (2/3) ... [2023-08-04 09:30:54,347 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@145c4ac3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 09:30:54, skipping insertion in model container [2023-08-04 09:30:54,347 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 09:30:54" (3/3) ... [2023-08-04 09:30:54,348 INFO L112 eAbstractionObserver]: Analyzing ICFG weaver_popl20-more-queue-add-3-nl.wvr_bound2.c [2023-08-04 09:30:54,354 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 09:30:54,360 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 09:30:54,360 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 09:30:54,360 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 09:30:54,423 INFO L144 ThreadInstanceAdder]: Constructed 9 joinOtherThreadTransitions. [2023-08-04 09:30:54,468 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 236 places, 262 transitions, 566 flow [2023-08-04 09:30:54,689 INFO L124 PetriNetUnfolderBase]: 111/739 cut-off events. [2023-08-04 09:30:54,689 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-04 09:30:54,701 INFO L83 FinitePrefix]: Finished finitePrefix Result has 800 conditions, 739 events. 111/739 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 3414 event pairs, 0 based on Foata normal form. 0/618 useless extension candidates. Maximal degree in co-relation 433. Up to 16 conditions per place. [2023-08-04 09:30:54,701 INFO L82 GeneralOperation]: Start removeDead. Operand has 236 places, 262 transitions, 566 flow [2023-08-04 09:30:54,712 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 236 places, 262 transitions, 566 flow [2023-08-04 09:30:54,715 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 09:30:54,727 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 236 places, 262 transitions, 566 flow [2023-08-04 09:30:54,730 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 236 places, 262 transitions, 566 flow [2023-08-04 09:30:54,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 236 places, 262 transitions, 566 flow [2023-08-04 09:30:54,831 INFO L124 PetriNetUnfolderBase]: 111/739 cut-off events. [2023-08-04 09:30:54,831 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-04 09:30:54,834 INFO L83 FinitePrefix]: Finished finitePrefix Result has 800 conditions, 739 events. 111/739 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 3414 event pairs, 0 based on Foata normal form. 0/618 useless extension candidates. Maximal degree in co-relation 433. Up to 16 conditions per place. [2023-08-04 09:30:54,845 INFO L119 LiptonReduction]: Number of co-enabled transitions 6842 [2023-08-04 09:31:01,986 INFO L134 LiptonReduction]: Checked pairs total: 16501 [2023-08-04 09:31:01,986 INFO L136 LiptonReduction]: Total number of compositions: 245 [2023-08-04 09:31:01,998 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 09:31:02,003 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=true, 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;@56f96951, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 09:31:02,003 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 09:31:02,009 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 09:31:02,009 INFO L124 PetriNetUnfolderBase]: 3/39 cut-off events. [2023-08-04 09:31:02,010 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 09:31:02,010 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:31:02,010 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:31:02,011 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:31:02,015 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:31:02,015 INFO L85 PathProgramCache]: Analyzing trace with hash -1963743283, now seen corresponding path program 1 times [2023-08-04 09:31:02,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:31:02,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671771080] [2023-08-04 09:31:02,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:31:02,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:31:02,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:31:02,265 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 09:31:02,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:31:02,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671771080] [2023-08-04 09:31:02,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671771080] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:31:02,266 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 09:31:02,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 09:31:02,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649807923] [2023-08-04 09:31:02,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:31:02,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:31:02,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:31:02,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:31:02,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 09:31:02,313 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 221 out of 507 [2023-08-04 09:31:02,318 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 59 transitions, 160 flow. Second operand has 3 states, 3 states have (on average 224.0) internal successors, (672), 3 states have internal predecessors, (672), 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) [2023-08-04 09:31:02,318 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:31:02,318 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 221 of 507 [2023-08-04 09:31:02,319 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:31:02,996 INFO L124 PetriNetUnfolderBase]: 5333/7836 cut-off events. [2023-08-04 09:31:02,997 INFO L125 PetriNetUnfolderBase]: For 491/491 co-relation queries the response was YES. [2023-08-04 09:31:03,005 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15596 conditions, 7836 events. 5333/7836 cut-off events. For 491/491 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 42306 event pairs, 2657 based on Foata normal form. 0/5672 useless extension candidates. Maximal degree in co-relation 13588. Up to 7350 conditions per place. [2023-08-04 09:31:03,031 INFO L140 encePairwiseOnDemand]: 501/507 looper letters, 50 selfloop transitions, 2 changer transitions 4/61 dead transitions. [2023-08-04 09:31:03,032 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 61 transitions, 270 flow [2023-08-04 09:31:03,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:31:03,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:31:03,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 720 transitions. [2023-08-04 09:31:03,044 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47337278106508873 [2023-08-04 09:31:03,045 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 720 transitions. [2023-08-04 09:31:03,045 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 720 transitions. [2023-08-04 09:31:03,047 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:31:03,049 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 720 transitions. [2023-08-04 09:31:03,053 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 240.0) internal successors, (720), 3 states have internal predecessors, (720), 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) [2023-08-04 09:31:03,058 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 507.0) internal successors, (2028), 4 states have internal predecessors, (2028), 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) [2023-08-04 09:31:03,059 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 507.0) internal successors, (2028), 4 states have internal predecessors, (2028), 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) [2023-08-04 09:31:03,061 INFO L175 Difference]: Start difference. First operand has 50 places, 59 transitions, 160 flow. Second operand 3 states and 720 transitions. [2023-08-04 09:31:03,062 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 61 transitions, 270 flow [2023-08-04 09:31:03,066 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 61 transitions, 270 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 09:31:03,067 INFO L231 Difference]: Finished difference. Result has 52 places, 53 transitions, 150 flow [2023-08-04 09:31:03,069 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=507, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=150, PETRI_PLACES=52, PETRI_TRANSITIONS=53} [2023-08-04 09:31:03,072 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 2 predicate places. [2023-08-04 09:31:03,072 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 53 transitions, 150 flow [2023-08-04 09:31:03,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 224.0) internal successors, (672), 3 states have internal predecessors, (672), 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) [2023-08-04 09:31:03,073 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:31:03,073 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:31:03,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 09:31:03,073 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:31:03,074 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:31:03,074 INFO L85 PathProgramCache]: Analyzing trace with hash 835086549, now seen corresponding path program 1 times [2023-08-04 09:31:03,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:31:03,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814317059] [2023-08-04 09:31:03,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:31:03,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:31:03,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:31:03,220 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 09:31:03,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:31:03,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814317059] [2023-08-04 09:31:03,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814317059] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:31:03,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012700065] [2023-08-04 09:31:03,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:31:03,221 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:31:03,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:31:03,225 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 09:31:03,257 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-04 09:31:03,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:31:03,319 INFO L262 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:31:03,323 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:31:03,336 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 09:31:03,337 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:31:03,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1012700065] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:31:03,337 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:31:03,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:31:03,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258308924] [2023-08-04 09:31:03,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:31:03,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:31:03,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:31:03,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:31:03,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:31:03,350 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 221 out of 507 [2023-08-04 09:31:03,351 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 53 transitions, 150 flow. Second operand has 3 states, 3 states have (on average 225.0) internal successors, (675), 3 states have internal predecessors, (675), 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) [2023-08-04 09:31:03,351 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:31:03,351 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 221 of 507 [2023-08-04 09:31:03,351 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:31:03,982 INFO L124 PetriNetUnfolderBase]: 5179/7623 cut-off events. [2023-08-04 09:31:03,982 INFO L125 PetriNetUnfolderBase]: For 414/414 co-relation queries the response was YES. [2023-08-04 09:31:03,993 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15126 conditions, 7623 events. 5179/7623 cut-off events. For 414/414 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 41136 event pairs, 2297 based on Foata normal form. 0/5587 useless extension candidates. Maximal degree in co-relation 13123. Up to 7051 conditions per place. [2023-08-04 09:31:04,025 INFO L140 encePairwiseOnDemand]: 504/507 looper letters, 55 selfloop transitions, 2 changer transitions 1/63 dead transitions. [2023-08-04 09:31:04,025 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 63 transitions, 286 flow [2023-08-04 09:31:04,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:31:04,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:31:04,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 722 transitions. [2023-08-04 09:31:04,027 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4746877054569362 [2023-08-04 09:31:04,028 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 722 transitions. [2023-08-04 09:31:04,028 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 722 transitions. [2023-08-04 09:31:04,028 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:31:04,028 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 722 transitions. [2023-08-04 09:31:04,030 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 240.66666666666666) internal successors, (722), 3 states have internal predecessors, (722), 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) [2023-08-04 09:31:04,032 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 507.0) internal successors, (2028), 4 states have internal predecessors, (2028), 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) [2023-08-04 09:31:04,033 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 507.0) internal successors, (2028), 4 states have internal predecessors, (2028), 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) [2023-08-04 09:31:04,033 INFO L175 Difference]: Start difference. First operand has 52 places, 53 transitions, 150 flow. Second operand 3 states and 722 transitions. [2023-08-04 09:31:04,034 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 63 transitions, 286 flow [2023-08-04 09:31:04,037 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 63 transitions, 270 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-08-04 09:31:04,038 INFO L231 Difference]: Finished difference. Result has 47 places, 53 transitions, 142 flow [2023-08-04 09:31:04,038 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=507, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=142, PETRI_PLACES=47, PETRI_TRANSITIONS=53} [2023-08-04 09:31:04,039 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, -3 predicate places. [2023-08-04 09:31:04,039 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 53 transitions, 142 flow [2023-08-04 09:31:04,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 225.0) internal successors, (675), 3 states have internal predecessors, (675), 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) [2023-08-04 09:31:04,040 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:31:04,040 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:31:04,048 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-04 09:31:04,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:31:04,245 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:31:04,245 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:31:04,246 INFO L85 PathProgramCache]: Analyzing trace with hash -227586730, now seen corresponding path program 1 times [2023-08-04 09:31:04,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:31:04,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897800642] [2023-08-04 09:31:04,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:31:04,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:31:04,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:31:04,325 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 09:31:04,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:31:04,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897800642] [2023-08-04 09:31:04,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897800642] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:31:04,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015352018] [2023-08-04 09:31:04,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:31:04,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:31:04,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:31:04,334 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 09:31:04,360 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-04 09:31:04,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:31:04,424 INFO L262 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:31:04,426 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:31:04,433 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 09:31:04,433 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:31:04,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2015352018] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:31:04,434 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:31:04,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:31:04,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386895003] [2023-08-04 09:31:04,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:31:04,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:31:04,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:31:04,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:31:04,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:31:04,446 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 221 out of 507 [2023-08-04 09:31:04,447 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 53 transitions, 142 flow. Second operand has 3 states, 3 states have (on average 226.0) internal successors, (678), 3 states have internal predecessors, (678), 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) [2023-08-04 09:31:04,447 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:31:04,447 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 221 of 507 [2023-08-04 09:31:04,447 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:31:04,973 INFO L124 PetriNetUnfolderBase]: 5154/7373 cut-off events. [2023-08-04 09:31:04,974 INFO L125 PetriNetUnfolderBase]: For 65/65 co-relation queries the response was YES. [2023-08-04 09:31:04,983 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14896 conditions, 7373 events. 5154/7373 cut-off events. For 65/65 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 36367 event pairs, 2681 based on Foata normal form. 0/5388 useless extension candidates. Maximal degree in co-relation 6191. Up to 6603 conditions per place. [2023-08-04 09:31:05,011 INFO L140 encePairwiseOnDemand]: 504/507 looper letters, 59 selfloop transitions, 2 changer transitions 1/67 dead transitions. [2023-08-04 09:31:05,011 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 67 transitions, 294 flow [2023-08-04 09:31:05,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:31:05,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:31:05,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 726 transitions. [2023-08-04 09:31:05,013 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47731755424063116 [2023-08-04 09:31:05,013 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 726 transitions. [2023-08-04 09:31:05,013 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 726 transitions. [2023-08-04 09:31:05,014 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:31:05,014 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 726 transitions. [2023-08-04 09:31:05,015 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 242.0) internal successors, (726), 3 states have internal predecessors, (726), 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) [2023-08-04 09:31:05,018 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 507.0) internal successors, (2028), 4 states have internal predecessors, (2028), 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) [2023-08-04 09:31:05,019 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 507.0) internal successors, (2028), 4 states have internal predecessors, (2028), 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) [2023-08-04 09:31:05,019 INFO L175 Difference]: Start difference. First operand has 47 places, 53 transitions, 142 flow. Second operand 3 states and 726 transitions. [2023-08-04 09:31:05,019 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 67 transitions, 294 flow [2023-08-04 09:31:05,020 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 67 transitions, 290 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 09:31:05,021 INFO L231 Difference]: Finished difference. Result has 48 places, 53 transitions, 146 flow [2023-08-04 09:31:05,021 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=507, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=146, PETRI_PLACES=48, PETRI_TRANSITIONS=53} [2023-08-04 09:31:05,022 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, -2 predicate places. [2023-08-04 09:31:05,022 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 53 transitions, 146 flow [2023-08-04 09:31:05,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 226.0) internal successors, (678), 3 states have internal predecessors, (678), 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) [2023-08-04 09:31:05,022 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:31:05,022 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:31:05,031 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-04 09:31:05,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-08-04 09:31:05,227 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:31:05,228 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:31:05,228 INFO L85 PathProgramCache]: Analyzing trace with hash 545633766, now seen corresponding path program 1 times [2023-08-04 09:31:05,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:31:05,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391885333] [2023-08-04 09:31:05,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:31:05,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:31:05,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:31:05,308 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 09:31:05,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:31:05,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391885333] [2023-08-04 09:31:05,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391885333] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:31:05,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082184871] [2023-08-04 09:31:05,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:31:05,309 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:31:05,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:31:05,311 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 09:31:05,313 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-04 09:31:05,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:31:05,400 INFO L262 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:31:05,401 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:31:05,418 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 09:31:05,418 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:31:05,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2082184871] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:31:05,418 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:31:05,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:31:05,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987449042] [2023-08-04 09:31:05,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:31:05,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:31:05,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:31:05,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:31:05,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:31:05,429 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 221 out of 507 [2023-08-04 09:31:05,430 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 53 transitions, 146 flow. Second operand has 3 states, 3 states have (on average 227.0) internal successors, (681), 3 states have internal predecessors, (681), 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) [2023-08-04 09:31:05,430 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:31:05,430 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 221 of 507 [2023-08-04 09:31:05,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:31:05,793 INFO L124 PetriNetUnfolderBase]: 3146/4655 cut-off events. [2023-08-04 09:31:05,793 INFO L125 PetriNetUnfolderBase]: For 271/271 co-relation queries the response was YES. [2023-08-04 09:31:05,802 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9706 conditions, 4655 events. 3146/4655 cut-off events. For 271/271 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 21822 event pairs, 1650 based on Foata normal form. 0/3569 useless extension candidates. Maximal degree in co-relation 4207. Up to 3426 conditions per place. [2023-08-04 09:31:05,819 INFO L140 encePairwiseOnDemand]: 504/507 looper letters, 64 selfloop transitions, 2 changer transitions 0/71 dead transitions. [2023-08-04 09:31:05,823 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 71 transitions, 320 flow [2023-08-04 09:31:05,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:31:05,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:31:05,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 730 transitions. [2023-08-04 09:31:05,825 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4799474030243261 [2023-08-04 09:31:05,825 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 730 transitions. [2023-08-04 09:31:05,825 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 730 transitions. [2023-08-04 09:31:05,826 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:31:05,826 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 730 transitions. [2023-08-04 09:31:05,827 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 243.33333333333334) internal successors, (730), 3 states have internal predecessors, (730), 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) [2023-08-04 09:31:05,830 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 507.0) internal successors, (2028), 4 states have internal predecessors, (2028), 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) [2023-08-04 09:31:05,830 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 507.0) internal successors, (2028), 4 states have internal predecessors, (2028), 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) [2023-08-04 09:31:05,831 INFO L175 Difference]: Start difference. First operand has 48 places, 53 transitions, 146 flow. Second operand 3 states and 730 transitions. [2023-08-04 09:31:05,831 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 71 transitions, 320 flow [2023-08-04 09:31:05,832 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 71 transitions, 316 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 09:31:05,833 INFO L231 Difference]: Finished difference. Result has 49 places, 54 transitions, 154 flow [2023-08-04 09:31:05,833 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=507, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=154, PETRI_PLACES=49, PETRI_TRANSITIONS=54} [2023-08-04 09:31:05,834 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, -1 predicate places. [2023-08-04 09:31:05,835 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 54 transitions, 154 flow [2023-08-04 09:31:05,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 227.0) internal successors, (681), 3 states have internal predecessors, (681), 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) [2023-08-04 09:31:05,835 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:31:05,835 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:31:05,842 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-04 09:31:06,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:31:06,045 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:31:06,045 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:31:06,045 INFO L85 PathProgramCache]: Analyzing trace with hash -1373595871, now seen corresponding path program 1 times [2023-08-04 09:31:06,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:31:06,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997240709] [2023-08-04 09:31:06,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:31:06,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:31:06,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:31:06,111 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 09:31:06,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:31:06,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997240709] [2023-08-04 09:31:06,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997240709] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:31:06,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266417610] [2023-08-04 09:31:06,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:31:06,115 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:31:06,116 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:31:06,117 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 09:31:06,119 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-04 09:31:06,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:31:06,213 INFO L262 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:31:06,215 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:31:06,227 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-04 09:31:06,227 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:31:06,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1266417610] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:31:06,228 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:31:06,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:31:06,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077535566] [2023-08-04 09:31:06,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:31:06,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:31:06,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:31:06,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:31:06,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:31:06,239 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 221 out of 507 [2023-08-04 09:31:06,240 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 54 transitions, 154 flow. Second operand has 3 states, 3 states have (on average 228.66666666666666) internal successors, (686), 3 states have internal predecessors, (686), 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) [2023-08-04 09:31:06,240 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:31:06,240 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 221 of 507 [2023-08-04 09:31:06,240 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:31:06,573 INFO L124 PetriNetUnfolderBase]: 2704/4022 cut-off events. [2023-08-04 09:31:06,573 INFO L125 PetriNetUnfolderBase]: For 506/506 co-relation queries the response was YES. [2023-08-04 09:31:06,580 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8629 conditions, 4022 events. 2704/4022 cut-off events. For 506/506 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 18398 event pairs, 1705 based on Foata normal form. 0/3228 useless extension candidates. Maximal degree in co-relation 3662. Up to 3336 conditions per place. [2023-08-04 09:31:06,591 INFO L140 encePairwiseOnDemand]: 504/507 looper letters, 65 selfloop transitions, 2 changer transitions 0/72 dead transitions. [2023-08-04 09:31:06,591 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 72 transitions, 330 flow [2023-08-04 09:31:06,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:31:06,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:31:06,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 730 transitions. [2023-08-04 09:31:06,594 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4799474030243261 [2023-08-04 09:31:06,594 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 730 transitions. [2023-08-04 09:31:06,594 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 730 transitions. [2023-08-04 09:31:06,594 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:31:06,594 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 730 transitions. [2023-08-04 09:31:06,596 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 243.33333333333334) internal successors, (730), 3 states have internal predecessors, (730), 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) [2023-08-04 09:31:06,598 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 507.0) internal successors, (2028), 4 states have internal predecessors, (2028), 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) [2023-08-04 09:31:06,599 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 507.0) internal successors, (2028), 4 states have internal predecessors, (2028), 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) [2023-08-04 09:31:06,599 INFO L175 Difference]: Start difference. First operand has 49 places, 54 transitions, 154 flow. Second operand 3 states and 730 transitions. [2023-08-04 09:31:06,599 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 72 transitions, 330 flow [2023-08-04 09:31:06,606 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 72 transitions, 328 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:31:06,608 INFO L231 Difference]: Finished difference. Result has 51 places, 55 transitions, 164 flow [2023-08-04 09:31:06,608 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=507, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=164, PETRI_PLACES=51, PETRI_TRANSITIONS=55} [2023-08-04 09:31:06,610 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 1 predicate places. [2023-08-04 09:31:06,610 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 55 transitions, 164 flow [2023-08-04 09:31:06,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 228.66666666666666) internal successors, (686), 3 states have internal predecessors, (686), 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) [2023-08-04 09:31:06,611 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:31:06,611 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:31:06,618 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-04 09:31:06,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:31:06,816 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:31:06,817 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:31:06,817 INFO L85 PathProgramCache]: Analyzing trace with hash -2070906291, now seen corresponding path program 1 times [2023-08-04 09:31:06,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:31:06,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497504701] [2023-08-04 09:31:06,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:31:06,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:31:06,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:31:06,902 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-04 09:31:06,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:31:06,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497504701] [2023-08-04 09:31:06,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497504701] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:31:06,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449958961] [2023-08-04 09:31:06,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:31:06,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:31:06,903 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:31:06,903 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 09:31:06,906 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-04 09:31:07,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:31:07,006 INFO L262 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:31:07,007 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:31:07,019 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 09:31:07,020 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:31:07,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [449958961] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:31:07,020 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:31:07,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-08-04 09:31:07,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739109258] [2023-08-04 09:31:07,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:31:07,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:31:07,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:31:07,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:31:07,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:31:07,030 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 221 out of 507 [2023-08-04 09:31:07,031 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 55 transitions, 164 flow. Second operand has 3 states, 3 states have (on average 231.0) internal successors, (693), 3 states have internal predecessors, (693), 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) [2023-08-04 09:31:07,031 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:31:07,031 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 221 of 507 [2023-08-04 09:31:07,031 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:31:07,348 INFO L124 PetriNetUnfolderBase]: 2688/3994 cut-off events. [2023-08-04 09:31:07,348 INFO L125 PetriNetUnfolderBase]: For 402/402 co-relation queries the response was YES. [2023-08-04 09:31:07,355 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8635 conditions, 3994 events. 2688/3994 cut-off events. For 402/402 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 18192 event pairs, 1910 based on Foata normal form. 0/3233 useless extension candidates. Maximal degree in co-relation 7076. Up to 3759 conditions per place. [2023-08-04 09:31:07,364 INFO L140 encePairwiseOnDemand]: 504/507 looper letters, 59 selfloop transitions, 2 changer transitions 3/69 dead transitions. [2023-08-04 09:31:07,365 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 69 transitions, 320 flow [2023-08-04 09:31:07,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:31:07,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:31:07,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 726 transitions. [2023-08-04 09:31:07,367 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47731755424063116 [2023-08-04 09:31:07,367 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 726 transitions. [2023-08-04 09:31:07,367 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 726 transitions. [2023-08-04 09:31:07,368 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:31:07,368 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 726 transitions. [2023-08-04 09:31:07,369 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 242.0) internal successors, (726), 3 states have internal predecessors, (726), 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) [2023-08-04 09:31:07,372 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 507.0) internal successors, (2028), 4 states have internal predecessors, (2028), 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) [2023-08-04 09:31:07,373 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 507.0) internal successors, (2028), 4 states have internal predecessors, (2028), 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) [2023-08-04 09:31:07,373 INFO L175 Difference]: Start difference. First operand has 51 places, 55 transitions, 164 flow. Second operand 3 states and 726 transitions. [2023-08-04 09:31:07,373 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 69 transitions, 320 flow [2023-08-04 09:31:07,390 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 69 transitions, 318 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:31:07,391 INFO L231 Difference]: Finished difference. Result has 53 places, 53 transitions, 162 flow [2023-08-04 09:31:07,391 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=507, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=162, PETRI_PLACES=53, PETRI_TRANSITIONS=53} [2023-08-04 09:31:07,391 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 3 predicate places. [2023-08-04 09:31:07,392 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 53 transitions, 162 flow [2023-08-04 09:31:07,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 231.0) internal successors, (693), 3 states have internal predecessors, (693), 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) [2023-08-04 09:31:07,392 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:31:07,392 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:31:07,400 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-04 09:31:07,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:31:07,598 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:31:07,598 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:31:07,598 INFO L85 PathProgramCache]: Analyzing trace with hash 2071790993, now seen corresponding path program 1 times [2023-08-04 09:31:07,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:31:07,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34394565] [2023-08-04 09:31:07,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:31:07,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:31:07,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:31:07,674 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 09:31:07,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:31:07,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34394565] [2023-08-04 09:31:07,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34394565] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:31:07,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62692222] [2023-08-04 09:31:07,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:31:07,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:31:07,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:31:07,676 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 09:31:07,678 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-04 09:31:07,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:31:07,786 INFO L262 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-04 09:31:07,788 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:31:07,827 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 09:31:07,827 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:31:07,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [62692222] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:31:07,828 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:31:07,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2023-08-04 09:31:07,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589913592] [2023-08-04 09:31:07,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:31:07,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 09:31:07,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:31:07,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 09:31:07,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-08-04 09:31:07,889 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 215 out of 507 [2023-08-04 09:31:07,890 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 53 transitions, 162 flow. Second operand has 4 states, 4 states have (on average 224.0) internal successors, (896), 4 states have internal predecessors, (896), 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) [2023-08-04 09:31:07,891 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:31:07,891 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 215 of 507 [2023-08-04 09:31:07,891 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:31:08,295 INFO L124 PetriNetUnfolderBase]: 2750/4143 cut-off events. [2023-08-04 09:31:08,295 INFO L125 PetriNetUnfolderBase]: For 354/354 co-relation queries the response was YES. [2023-08-04 09:31:08,302 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8950 conditions, 4143 events. 2750/4143 cut-off events. For 354/354 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 19505 event pairs, 1992 based on Foata normal form. 190/3566 useless extension candidates. Maximal degree in co-relation 8775. Up to 3691 conditions per place. [2023-08-04 09:31:08,311 INFO L140 encePairwiseOnDemand]: 500/507 looper letters, 47 selfloop transitions, 2 changer transitions 49/103 dead transitions. [2023-08-04 09:31:08,311 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 103 transitions, 514 flow [2023-08-04 09:31:08,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 09:31:08,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 09:31:08,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1179 transitions. [2023-08-04 09:31:08,315 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4650887573964497 [2023-08-04 09:31:08,315 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1179 transitions. [2023-08-04 09:31:08,315 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1179 transitions. [2023-08-04 09:31:08,315 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:31:08,315 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1179 transitions. [2023-08-04 09:31:08,318 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 235.8) internal successors, (1179), 5 states have internal predecessors, (1179), 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) [2023-08-04 09:31:08,321 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 507.0) internal successors, (3042), 6 states have internal predecessors, (3042), 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) [2023-08-04 09:31:08,322 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 507.0) internal successors, (3042), 6 states have internal predecessors, (3042), 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) [2023-08-04 09:31:08,322 INFO L175 Difference]: Start difference. First operand has 53 places, 53 transitions, 162 flow. Second operand 5 states and 1179 transitions. [2023-08-04 09:31:08,322 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 103 transitions, 514 flow [2023-08-04 09:31:08,328 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 103 transitions, 510 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 09:31:08,329 INFO L231 Difference]: Finished difference. Result has 58 places, 54 transitions, 184 flow [2023-08-04 09:31:08,329 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=507, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=184, PETRI_PLACES=58, PETRI_TRANSITIONS=54} [2023-08-04 09:31:08,330 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 8 predicate places. [2023-08-04 09:31:08,330 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 54 transitions, 184 flow [2023-08-04 09:31:08,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 224.0) internal successors, (896), 4 states have internal predecessors, (896), 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) [2023-08-04 09:31:08,331 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:31:08,331 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:31:08,339 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-04 09:31:08,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:31:08,536 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:31:08,536 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:31:08,536 INFO L85 PathProgramCache]: Analyzing trace with hash -1645082762, now seen corresponding path program 1 times [2023-08-04 09:31:08,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:31:08,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946489996] [2023-08-04 09:31:08,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:31:08,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:31:08,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:31:08,605 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 09:31:08,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:31:08,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946489996] [2023-08-04 09:31:08,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946489996] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:31:08,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1863221572] [2023-08-04 09:31:08,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:31:08,606 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:31:08,606 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:31:08,607 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 09:31:08,609 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-04 09:31:08,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:31:08,718 INFO L262 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 09:31:08,720 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:31:08,734 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 09:31:08,734 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 09:31:08,751 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 09:31:08,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1863221572] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 09:31:08,752 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 09:31:08,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 09:31:08,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434231193] [2023-08-04 09:31:08,752 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 09:31:08,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 09:31:08,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:31:08,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 09:31:08,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:31:08,763 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 220 out of 507 [2023-08-04 09:31:08,764 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 54 transitions, 184 flow. Second operand has 5 states, 5 states have (on average 228.4) internal successors, (1142), 5 states have internal predecessors, (1142), 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) [2023-08-04 09:31:08,764 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:31:08,764 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 220 of 507 [2023-08-04 09:31:08,764 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:31:08,792 INFO L124 PetriNetUnfolderBase]: 14/34 cut-off events. [2023-08-04 09:31:08,792 INFO L125 PetriNetUnfolderBase]: For 14/14 co-relation queries the response was YES. [2023-08-04 09:31:08,792 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113 conditions, 34 events. 14/34 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 63 event pairs, 1 based on Foata normal form. 5/33 useless extension candidates. Maximal degree in co-relation 98. Up to 21 conditions per place. [2023-08-04 09:31:08,792 INFO L140 encePairwiseOnDemand]: 504/507 looper letters, 0 selfloop transitions, 0 changer transitions 19/19 dead transitions. [2023-08-04 09:31:08,792 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 19 transitions, 106 flow [2023-08-04 09:31:08,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 09:31:08,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 09:31:08,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 898 transitions. [2023-08-04 09:31:08,795 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4428007889546351 [2023-08-04 09:31:08,795 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 898 transitions. [2023-08-04 09:31:08,795 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 898 transitions. [2023-08-04 09:31:08,796 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:31:08,796 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 898 transitions. [2023-08-04 09:31:08,798 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 224.5) internal successors, (898), 4 states have internal predecessors, (898), 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) [2023-08-04 09:31:08,800 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 507.0) internal successors, (2535), 5 states have internal predecessors, (2535), 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) [2023-08-04 09:31:08,801 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 507.0) internal successors, (2535), 5 states have internal predecessors, (2535), 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) [2023-08-04 09:31:08,801 INFO L175 Difference]: Start difference. First operand has 58 places, 54 transitions, 184 flow. Second operand 4 states and 898 transitions. [2023-08-04 09:31:08,801 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 19 transitions, 106 flow [2023-08-04 09:31:08,802 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 19 transitions, 82 flow, removed 10 selfloop flow, removed 4 redundant places. [2023-08-04 09:31:08,802 INFO L231 Difference]: Finished difference. Result has 24 places, 0 transitions, 0 flow [2023-08-04 09:31:08,802 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=507, PETRI_DIFFERENCE_MINUEND_FLOW=36, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=14, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=24, PETRI_TRANSITIONS=0} [2023-08-04 09:31:08,802 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, -26 predicate places. [2023-08-04 09:31:08,803 INFO L495 AbstractCegarLoop]: Abstraction has has 24 places, 0 transitions, 0 flow [2023-08-04 09:31:08,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 228.4) internal successors, (1142), 5 states have internal predecessors, (1142), 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) [2023-08-04 09:31:08,805 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-04 09:31:08,813 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-04 09:31:09,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:31:09,010 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:31:09,012 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-04 09:31:09,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 236 places, 262 transitions, 566 flow [2023-08-04 09:31:09,079 INFO L124 PetriNetUnfolderBase]: 111/739 cut-off events. [2023-08-04 09:31:09,080 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-04 09:31:09,082 INFO L83 FinitePrefix]: Finished finitePrefix Result has 800 conditions, 739 events. 111/739 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 3414 event pairs, 0 based on Foata normal form. 0/618 useless extension candidates. Maximal degree in co-relation 433. Up to 16 conditions per place. [2023-08-04 09:31:09,082 INFO L82 GeneralOperation]: Start removeDead. Operand has 236 places, 262 transitions, 566 flow [2023-08-04 09:31:09,084 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 236 places, 262 transitions, 566 flow [2023-08-04 09:31:09,085 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 09:31:09,085 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 236 places, 262 transitions, 566 flow [2023-08-04 09:31:09,086 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 236 places, 262 transitions, 566 flow [2023-08-04 09:31:09,086 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 236 places, 262 transitions, 566 flow [2023-08-04 09:31:09,145 INFO L124 PetriNetUnfolderBase]: 111/739 cut-off events. [2023-08-04 09:31:09,145 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-04 09:31:09,148 INFO L83 FinitePrefix]: Finished finitePrefix Result has 800 conditions, 739 events. 111/739 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 3414 event pairs, 0 based on Foata normal form. 0/618 useless extension candidates. Maximal degree in co-relation 433. Up to 16 conditions per place. [2023-08-04 09:31:09,156 INFO L119 LiptonReduction]: Number of co-enabled transitions 6842 [2023-08-04 09:31:15,637 INFO L134 LiptonReduction]: Checked pairs total: 16595 [2023-08-04 09:31:15,638 INFO L136 LiptonReduction]: Total number of compositions: 244 [2023-08-04 09:31:15,639 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 09:31:15,639 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, 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;@56f96951, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 09:31:15,640 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-04 09:31:15,643 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 09:31:15,643 INFO L124 PetriNetUnfolderBase]: 3/36 cut-off events. [2023-08-04 09:31:15,643 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 09:31:15,643 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:31:15,643 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-08-04 09:31:15,644 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 09:31:15,644 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:31:15,644 INFO L85 PathProgramCache]: Analyzing trace with hash -1324873726, now seen corresponding path program 1 times [2023-08-04 09:31:15,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:31:15,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120155784] [2023-08-04 09:31:15,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:31:15,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:31:15,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 09:31:15,684 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 09:31:15,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 09:31:15,725 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 09:31:15,727 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 09:31:15,727 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-04 09:31:15,727 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-04 09:31:15,727 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-04 09:31:15,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-04 09:31:15,728 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-04 09:31:15,728 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN,UNKNOWN (2/2) [2023-08-04 09:31:15,729 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 09:31:15,729 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 09:31:15,764 INFO L144 ThreadInstanceAdder]: Constructed 18 joinOtherThreadTransitions. [2023-08-04 09:31:15,766 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 275 places, 312 transitions, 714 flow [2023-08-04 09:31:16,221 INFO L124 PetriNetUnfolderBase]: 919/4271 cut-off events. [2023-08-04 09:31:16,221 INFO L125 PetriNetUnfolderBase]: For 602/602 co-relation queries the response was YES. [2023-08-04 09:31:16,254 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4945 conditions, 4271 events. 919/4271 cut-off events. For 602/602 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 34105 event pairs, 22 based on Foata normal form. 0/3596 useless extension candidates. Maximal degree in co-relation 2564. Up to 192 conditions per place. [2023-08-04 09:31:16,255 INFO L82 GeneralOperation]: Start removeDead. Operand has 275 places, 312 transitions, 714 flow [2023-08-04 09:31:16,276 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 275 places, 312 transitions, 714 flow [2023-08-04 09:31:16,276 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 09:31:16,277 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 275 places, 312 transitions, 714 flow [2023-08-04 09:31:16,277 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 275 places, 312 transitions, 714 flow [2023-08-04 09:31:16,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 275 places, 312 transitions, 714 flow [2023-08-04 09:31:16,770 INFO L124 PetriNetUnfolderBase]: 919/4271 cut-off events. [2023-08-04 09:31:16,770 INFO L125 PetriNetUnfolderBase]: For 602/602 co-relation queries the response was YES. [2023-08-04 09:31:16,801 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4945 conditions, 4271 events. 919/4271 cut-off events. For 602/602 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 34105 event pairs, 22 based on Foata normal form. 0/3596 useless extension candidates. Maximal degree in co-relation 2564. Up to 192 conditions per place. [2023-08-04 09:31:16,865 INFO L119 LiptonReduction]: Number of co-enabled transitions 18172 [2023-08-04 09:31:23,967 INFO L134 LiptonReduction]: Checked pairs total: 63568 [2023-08-04 09:31:23,967 INFO L136 LiptonReduction]: Total number of compositions: 275 [2023-08-04 09:31:23,968 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 09:31:23,969 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=true, 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;@56f96951, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 09:31:23,969 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 09:31:23,972 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 09:31:23,972 INFO L124 PetriNetUnfolderBase]: 3/35 cut-off events. [2023-08-04 09:31:23,972 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-04 09:31:23,972 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:31:23,972 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:31:23,972 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:31:23,972 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:31:23,972 INFO L85 PathProgramCache]: Analyzing trace with hash -308976206, now seen corresponding path program 1 times [2023-08-04 09:31:23,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:31:23,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912403118] [2023-08-04 09:31:23,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:31:23,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:31:23,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:31:24,011 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 09:31:24,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:31:24,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912403118] [2023-08-04 09:31:24,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912403118] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:31:24,012 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 09:31:24,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 09:31:24,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802923695] [2023-08-04 09:31:24,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:31:24,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:31:24,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:31:24,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:31:24,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 09:31:24,021 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 249 out of 587 [2023-08-04 09:31:24,022 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 93 transitions, 276 flow. Second operand has 3 states, 3 states have (on average 252.0) internal successors, (756), 3 states have internal predecessors, (756), 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) [2023-08-04 09:31:24,022 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:31:24,022 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 249 of 587 [2023-08-04 09:31:24,022 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand