/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-array-sum2.wvr_bound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 09:20:58,167 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 09:20:58,219 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 09:20:58,224 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 09:20:58,225 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 09:20:58,225 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 09:20:58,225 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 09:20:58,251 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 09:20:58,251 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 09:20:58,251 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 09:20:58,251 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 09:20:58,252 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 09:20:58,252 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 09:20:58,252 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 09:20:58,253 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 09:20:58,253 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 09:20:58,253 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 09:20:58,253 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 09:20:58,253 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 09:20:58,254 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 09:20:58,254 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 09:20:58,257 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 09:20:58,257 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 09:20:58,257 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 09:20:58,257 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 09:20:58,257 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 09:20:58,258 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 09:20:58,258 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 09:20:58,258 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 09:20:58,258 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 09:20:58,258 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 09:20:58,259 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 09:20:58,259 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 09:20:58,259 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 09:20:58,259 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 09:20:58,259 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 09:20:58,259 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 09:20:58,260 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 09:20:58,260 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 09:20:58,260 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 09:20:58,260 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 09:20:58,263 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-04 09:20:58,435 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 09:20:58,454 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 09:20:58,455 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 09:20:58,456 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 09:20:58,456 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 09:20:58,457 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-more-array-sum2.wvr_bound2.c [2023-08-04 09:20:59,406 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 09:20:59,563 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 09:20:59,563 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-more-array-sum2.wvr_bound2.c [2023-08-04 09:20:59,572 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/afec0734e/f23a771b1a814b3998ceb841d5bfa541/FLAG563b2d3fe [2023-08-04 09:20:59,587 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/afec0734e/f23a771b1a814b3998ceb841d5bfa541 [2023-08-04 09:20:59,591 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 09:20:59,593 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 09:20:59,595 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 09:20:59,595 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 09:20:59,597 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 09:20:59,598 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 09:20:59" (1/1) ... [2023-08-04 09:20:59,599 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@552ff54f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:20:59, skipping insertion in model container [2023-08-04 09:20:59,599 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 09:20:59" (1/1) ... [2023-08-04 09:20:59,620 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 09:20:59,766 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-array-sum2.wvr_bound2.c[2842,2855] [2023-08-04 09:20:59,772 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 09:20:59,777 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 09:20:59,807 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-array-sum2.wvr_bound2.c[2842,2855] [2023-08-04 09:20:59,810 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 09:20:59,818 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 09:20:59,818 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 09:20:59,822 INFO L206 MainTranslator]: Completed translation [2023-08-04 09:20:59,822 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:20:59 WrapperNode [2023-08-04 09:20:59,822 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 09:20:59,823 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 09:20:59,823 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 09:20:59,823 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 09:20:59,827 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:20:59" (1/1) ... [2023-08-04 09:20:59,844 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:20:59" (1/1) ... [2023-08-04 09:20:59,877 INFO L138 Inliner]: procedures = 25, calls = 52, calls flagged for inlining = 16, calls inlined = 28, statements flattened = 323 [2023-08-04 09:20:59,877 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 09:20:59,878 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 09:20:59,878 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 09:20:59,878 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 09:20:59,884 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:20:59" (1/1) ... [2023-08-04 09:20:59,885 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:20:59" (1/1) ... [2023-08-04 09:20:59,895 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:20:59" (1/1) ... [2023-08-04 09:20:59,895 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:20:59" (1/1) ... [2023-08-04 09:20:59,904 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:20:59" (1/1) ... [2023-08-04 09:20:59,907 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:20:59" (1/1) ... [2023-08-04 09:20:59,908 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:20:59" (1/1) ... [2023-08-04 09:20:59,909 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:20:59" (1/1) ... [2023-08-04 09:20:59,911 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 09:20:59,912 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 09:20:59,912 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 09:20:59,912 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 09:20:59,922 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:20:59" (1/1) ... [2023-08-04 09:20:59,928 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 09:20:59,936 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:20:59,944 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 09:20:59,972 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 09:20:59,972 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 09:20:59,972 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 09:20:59,972 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 09:20:59,972 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-04 09:20:59,972 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-04 09:20:59,972 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-04 09:20:59,972 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-04 09:20:59,973 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-04 09:20:59,974 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-04 09:20:59,974 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 09:20:59,974 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-04 09:20:59,974 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-04 09:20:59,975 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-04 09:20:59,975 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 09:20:59,975 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 09:20:59,975 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 09:20:59,976 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 09:20:59,964 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 09:21:00,074 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 09:21:00,075 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 09:21:00,411 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 09:21:00,587 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 09:21:00,587 INFO L302 CfgBuilder]: Removed 11 assume(true) statements. [2023-08-04 09:21:00,589 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 09:21:00 BoogieIcfgContainer [2023-08-04 09:21:00,589 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 09:21:00,590 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 09:21:00,590 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 09:21:00,592 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 09:21:00,592 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 09:20:59" (1/3) ... [2023-08-04 09:21:00,593 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ef77ad7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 09:21:00, skipping insertion in model container [2023-08-04 09:21:00,593 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:20:59" (2/3) ... [2023-08-04 09:21:00,593 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ef77ad7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 09:21:00, skipping insertion in model container [2023-08-04 09:21:00,593 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 09:21:00" (3/3) ... [2023-08-04 09:21:00,594 INFO L112 eAbstractionObserver]: Analyzing ICFG weaver_popl20-more-array-sum2.wvr_bound2.c [2023-08-04 09:21:00,598 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 09:21:00,604 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 09:21:00,604 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 09:21:00,604 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 09:21:00,641 INFO L144 ThreadInstanceAdder]: Constructed 9 joinOtherThreadTransitions. [2023-08-04 09:21:00,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 204 places, 228 transitions, 498 flow [2023-08-04 09:21:00,762 INFO L124 PetriNetUnfolderBase]: 105/696 cut-off events. [2023-08-04 09:21:00,763 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-04 09:21:00,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 757 conditions, 696 events. 105/696 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 3258 event pairs, 0 based on Foata normal form. 0/581 useless extension candidates. Maximal degree in co-relation 407. Up to 16 conditions per place. [2023-08-04 09:21:00,769 INFO L82 GeneralOperation]: Start removeDead. Operand has 204 places, 228 transitions, 498 flow [2023-08-04 09:21:00,774 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 204 places, 228 transitions, 498 flow [2023-08-04 09:21:00,776 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 09:21:00,782 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 204 places, 228 transitions, 498 flow [2023-08-04 09:21:00,783 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 204 places, 228 transitions, 498 flow [2023-08-04 09:21:00,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 204 places, 228 transitions, 498 flow [2023-08-04 09:21:00,843 INFO L124 PetriNetUnfolderBase]: 105/696 cut-off events. [2023-08-04 09:21:00,843 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-04 09:21:00,846 INFO L83 FinitePrefix]: Finished finitePrefix Result has 757 conditions, 696 events. 105/696 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 3258 event pairs, 0 based on Foata normal form. 0/581 useless extension candidates. Maximal degree in co-relation 407. Up to 16 conditions per place. [2023-08-04 09:21:00,853 INFO L119 LiptonReduction]: Number of co-enabled transitions 5220 [2023-08-04 09:21:06,853 INFO L134 LiptonReduction]: Checked pairs total: 8777 [2023-08-04 09:21:06,853 INFO L136 LiptonReduction]: Total number of compositions: 210 [2023-08-04 09:21:06,865 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 09:21:06,870 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;@7ea530b4, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 09:21:06,870 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 09:21:06,877 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 09:21:06,877 INFO L124 PetriNetUnfolderBase]: 5/38 cut-off events. [2023-08-04 09:21:06,877 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 09:21:06,877 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:21:06,878 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:21:06,878 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:21:06,882 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:21:06,883 INFO L85 PathProgramCache]: Analyzing trace with hash 238846120, now seen corresponding path program 1 times [2023-08-04 09:21:06,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:21:06,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948149906] [2023-08-04 09:21:06,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:21:06,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:21:07,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:21:07,153 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 09:21:07,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:21:07,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948149906] [2023-08-04 09:21:07,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948149906] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:21:07,155 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 09:21:07,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 09:21:07,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833352894] [2023-08-04 09:21:07,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:21:07,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:21:07,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:21:07,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:21:07,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 09:21:07,200 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 438 [2023-08-04 09:21:07,204 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 51 transitions, 144 flow. Second operand has 3 states, 3 states have (on average 194.0) internal successors, (582), 3 states have internal predecessors, (582), 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 09:21:07,205 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:21:07,205 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 438 [2023-08-04 09:21:07,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:21:07,526 INFO L124 PetriNetUnfolderBase]: 2190/3070 cut-off events. [2023-08-04 09:21:07,526 INFO L125 PetriNetUnfolderBase]: For 177/177 co-relation queries the response was YES. [2023-08-04 09:21:07,530 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6197 conditions, 3070 events. 2190/3070 cut-off events. For 177/177 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 13998 event pairs, 825 based on Foata normal form. 0/1767 useless extension candidates. Maximal degree in co-relation 4980. Up to 2910 conditions per place. [2023-08-04 09:21:07,541 INFO L140 encePairwiseOnDemand]: 434/438 looper letters, 41 selfloop transitions, 2 changer transitions 4/53 dead transitions. [2023-08-04 09:21:07,542 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 53 transitions, 236 flow [2023-08-04 09:21:07,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:21:07,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:21:07,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 619 transitions. [2023-08-04 09:21:07,557 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4710806697108067 [2023-08-04 09:21:07,557 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 619 transitions. [2023-08-04 09:21:07,558 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 619 transitions. [2023-08-04 09:21:07,560 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:21:07,561 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 619 transitions. [2023-08-04 09:21:07,565 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 206.33333333333334) internal successors, (619), 3 states have internal predecessors, (619), 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 09:21:07,570 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 438.0) internal successors, (1752), 4 states have internal predecessors, (1752), 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 09:21:07,570 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 438.0) internal successors, (1752), 4 states have internal predecessors, (1752), 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 09:21:07,571 INFO L175 Difference]: Start difference. First operand has 44 places, 51 transitions, 144 flow. Second operand 3 states and 619 transitions. [2023-08-04 09:21:07,572 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 53 transitions, 236 flow [2023-08-04 09:21:07,575 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 53 transitions, 236 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 09:21:07,577 INFO L231 Difference]: Finished difference. Result has 46 places, 47 transitions, 138 flow [2023-08-04 09:21:07,578 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=138, PETRI_PLACES=46, PETRI_TRANSITIONS=47} [2023-08-04 09:21:07,580 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 2 predicate places. [2023-08-04 09:21:07,580 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 47 transitions, 138 flow [2023-08-04 09:21:07,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 194.0) internal successors, (582), 3 states have internal predecessors, (582), 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 09:21:07,581 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:21:07,581 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:21:07,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 09:21:07,582 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:21:07,583 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:21:07,583 INFO L85 PathProgramCache]: Analyzing trace with hash 1367276095, now seen corresponding path program 1 times [2023-08-04 09:21:07,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:21:07,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278290096] [2023-08-04 09:21:07,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:21:07,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:21:07,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:21:07,692 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 09:21:07,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:21:07,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278290096] [2023-08-04 09:21:07,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278290096] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:21:07,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174366722] [2023-08-04 09:21:07,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:21:07,693 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:21:07,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:21:07,696 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 09:21:07,725 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 09:21:07,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:21:07,779 INFO L262 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:21:07,782 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:21:07,794 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 09:21:07,794 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:21:07,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [174366722] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:21:07,795 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:21:07,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:21:07,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103232949] [2023-08-04 09:21:07,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:21:07,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:21:07,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:21:07,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:21:07,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:21:07,809 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 438 [2023-08-04 09:21:07,810 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 47 transitions, 138 flow. Second operand has 3 states, 3 states have (on average 195.0) internal successors, (585), 3 states have internal predecessors, (585), 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 09:21:07,810 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:21:07,812 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 438 [2023-08-04 09:21:07,812 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:21:08,073 INFO L124 PetriNetUnfolderBase]: 2098/2913 cut-off events. [2023-08-04 09:21:08,074 INFO L125 PetriNetUnfolderBase]: For 183/183 co-relation queries the response was YES. [2023-08-04 09:21:08,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5887 conditions, 2913 events. 2098/2913 cut-off events. For 183/183 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 12888 event pairs, 804 based on Foata normal form. 0/1671 useless extension candidates. Maximal degree in co-relation 4671. Up to 2759 conditions per place. [2023-08-04 09:21:08,089 INFO L140 encePairwiseOnDemand]: 435/438 looper letters, 43 selfloop transitions, 2 changer transitions 1/52 dead transitions. [2023-08-04 09:21:08,091 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 52 transitions, 240 flow [2023-08-04 09:21:08,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:21:08,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:21:08,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 620 transitions. [2023-08-04 09:21:08,096 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.471841704718417 [2023-08-04 09:21:08,096 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 620 transitions. [2023-08-04 09:21:08,096 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 620 transitions. [2023-08-04 09:21:08,096 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:21:08,096 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 620 transitions. [2023-08-04 09:21:08,097 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 206.66666666666666) internal successors, (620), 3 states have internal predecessors, (620), 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 09:21:08,099 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 438.0) internal successors, (1752), 4 states have internal predecessors, (1752), 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 09:21:08,100 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 438.0) internal successors, (1752), 4 states have internal predecessors, (1752), 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 09:21:08,100 INFO L175 Difference]: Start difference. First operand has 46 places, 47 transitions, 138 flow. Second operand 3 states and 620 transitions. [2023-08-04 09:21:08,100 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 52 transitions, 240 flow [2023-08-04 09:21:08,103 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 52 transitions, 224 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-08-04 09:21:08,103 INFO L231 Difference]: Finished difference. Result has 41 places, 47 transitions, 130 flow [2023-08-04 09:21:08,104 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=130, PETRI_PLACES=41, PETRI_TRANSITIONS=47} [2023-08-04 09:21:08,104 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, -3 predicate places. [2023-08-04 09:21:08,104 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 47 transitions, 130 flow [2023-08-04 09:21:08,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 195.0) internal successors, (585), 3 states have internal predecessors, (585), 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 09:21:08,105 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:21:08,105 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:21:08,125 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-04 09:21:08,309 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 09:21:08,310 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:21:08,310 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:21:08,310 INFO L85 PathProgramCache]: Analyzing trace with hash -1633530883, now seen corresponding path program 1 times [2023-08-04 09:21:08,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:21:08,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625074405] [2023-08-04 09:21:08,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:21:08,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:21:08,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:21:08,422 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 09:21:08,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:21:08,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625074405] [2023-08-04 09:21:08,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625074405] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:21:08,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1462716752] [2023-08-04 09:21:08,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:21:08,423 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:21:08,423 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:21:08,424 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 09:21:08,426 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 09:21:08,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:21:08,503 INFO L262 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:21:08,505 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:21:08,512 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 09:21:08,512 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:21:08,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1462716752] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:21:08,512 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:21:08,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:21:08,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170361323] [2023-08-04 09:21:08,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:21:08,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:21:08,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:21:08,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:21:08,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:21:08,536 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 438 [2023-08-04 09:21:08,536 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 47 transitions, 130 flow. Second operand has 3 states, 3 states have (on average 196.0) internal successors, (588), 3 states have internal predecessors, (588), 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 09:21:08,536 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:21:08,536 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 438 [2023-08-04 09:21:08,537 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:21:08,884 INFO L124 PetriNetUnfolderBase]: 2089/2904 cut-off events. [2023-08-04 09:21:08,884 INFO L125 PetriNetUnfolderBase]: For 14/14 co-relation queries the response was YES. [2023-08-04 09:21:08,889 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5878 conditions, 2904 events. 2089/2904 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 12796 event pairs, 789 based on Foata normal form. 0/1678 useless extension candidates. Maximal degree in co-relation 2270. Up to 2640 conditions per place. [2023-08-04 09:21:08,900 INFO L140 encePairwiseOnDemand]: 435/438 looper letters, 45 selfloop transitions, 2 changer transitions 1/54 dead transitions. [2023-08-04 09:21:08,900 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 54 transitions, 240 flow [2023-08-04 09:21:08,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:21:08,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:21:08,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 622 transitions. [2023-08-04 09:21:08,904 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4733637747336377 [2023-08-04 09:21:08,904 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 622 transitions. [2023-08-04 09:21:08,904 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 622 transitions. [2023-08-04 09:21:08,904 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:21:08,904 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 622 transitions. [2023-08-04 09:21:08,906 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 207.33333333333334) internal successors, (622), 3 states have internal predecessors, (622), 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 09:21:08,908 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 438.0) internal successors, (1752), 4 states have internal predecessors, (1752), 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 09:21:08,909 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 438.0) internal successors, (1752), 4 states have internal predecessors, (1752), 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 09:21:08,909 INFO L175 Difference]: Start difference. First operand has 41 places, 47 transitions, 130 flow. Second operand 3 states and 622 transitions. [2023-08-04 09:21:08,909 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 54 transitions, 240 flow [2023-08-04 09:21:08,911 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 54 transitions, 236 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 09:21:08,912 INFO L231 Difference]: Finished difference. Result has 42 places, 47 transitions, 134 flow [2023-08-04 09:21:08,913 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=134, PETRI_PLACES=42, PETRI_TRANSITIONS=47} [2023-08-04 09:21:08,914 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, -2 predicate places. [2023-08-04 09:21:08,914 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 47 transitions, 134 flow [2023-08-04 09:21:08,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 196.0) internal successors, (588), 3 states have internal predecessors, (588), 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 09:21:08,914 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:21:08,914 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 09:21:08,926 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 09:21:09,119 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 09:21:09,120 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:21:09,120 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:21:09,120 INFO L85 PathProgramCache]: Analyzing trace with hash 985146918, now seen corresponding path program 1 times [2023-08-04 09:21:09,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:21:09,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519159662] [2023-08-04 09:21:09,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:21:09,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:21:09,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:21:09,164 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 09:21:09,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:21:09,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519159662] [2023-08-04 09:21:09,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519159662] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:21:09,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647650090] [2023-08-04 09:21:09,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:21:09,165 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:21:09,165 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:21:09,181 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 09:21:09,206 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 09:21:09,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:21:09,254 INFO L262 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:21:09,255 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:21:09,264 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 09:21:09,264 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:21:09,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [647650090] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:21:09,264 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:21:09,264 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:21:09,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007268228] [2023-08-04 09:21:09,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:21:09,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:21:09,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:21:09,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:21:09,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:21:09,274 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 438 [2023-08-04 09:21:09,275 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 47 transitions, 134 flow. Second operand has 3 states, 3 states have (on average 197.0) internal successors, (591), 3 states have internal predecessors, (591), 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 09:21:09,275 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:21:09,276 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 438 [2023-08-04 09:21:09,276 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:21:09,435 INFO L124 PetriNetUnfolderBase]: 1351/1923 cut-off events. [2023-08-04 09:21:09,437 INFO L125 PetriNetUnfolderBase]: For 45/45 co-relation queries the response was YES. [2023-08-04 09:21:09,440 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3980 conditions, 1923 events. 1351/1923 cut-off events. For 45/45 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 7852 event pairs, 492 based on Foata normal form. 0/1141 useless extension candidates. Maximal degree in co-relation 1654. Up to 1485 conditions per place. [2023-08-04 09:21:09,446 INFO L140 encePairwiseOnDemand]: 435/438 looper letters, 50 selfloop transitions, 2 changer transitions 0/58 dead transitions. [2023-08-04 09:21:09,446 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 58 transitions, 266 flow [2023-08-04 09:21:09,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:21:09,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:21:09,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 626 transitions. [2023-08-04 09:21:09,448 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4764079147640791 [2023-08-04 09:21:09,448 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 626 transitions. [2023-08-04 09:21:09,448 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 626 transitions. [2023-08-04 09:21:09,448 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:21:09,448 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 626 transitions. [2023-08-04 09:21:09,449 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 208.66666666666666) internal successors, (626), 3 states have internal predecessors, (626), 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 09:21:09,451 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 438.0) internal successors, (1752), 4 states have internal predecessors, (1752), 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 09:21:09,451 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 438.0) internal successors, (1752), 4 states have internal predecessors, (1752), 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 09:21:09,451 INFO L175 Difference]: Start difference. First operand has 42 places, 47 transitions, 134 flow. Second operand 3 states and 626 transitions. [2023-08-04 09:21:09,452 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 58 transitions, 266 flow [2023-08-04 09:21:09,454 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 58 transitions, 262 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 09:21:09,455 INFO L231 Difference]: Finished difference. Result has 43 places, 48 transitions, 142 flow [2023-08-04 09:21:09,455 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=142, PETRI_PLACES=43, PETRI_TRANSITIONS=48} [2023-08-04 09:21:09,456 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, -1 predicate places. [2023-08-04 09:21:09,457 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 48 transitions, 142 flow [2023-08-04 09:21:09,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 197.0) internal successors, (591), 3 states have internal predecessors, (591), 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 09:21:09,457 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:21:09,457 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] [2023-08-04 09:21:09,466 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-08-04 09:21:09,661 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 09:21:09,661 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:21:09,662 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:21:09,662 INFO L85 PathProgramCache]: Analyzing trace with hash -100813473, now seen corresponding path program 1 times [2023-08-04 09:21:09,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:21:09,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328782284] [2023-08-04 09:21:09,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:21:09,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:21:09,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:21:09,747 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 09:21:09,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:21:09,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328782284] [2023-08-04 09:21:09,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328782284] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:21:09,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038663742] [2023-08-04 09:21:09,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:21:09,751 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:21:09,751 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:21:09,758 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 09:21:09,760 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 09:21:09,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:21:09,843 INFO L262 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:21:09,844 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:21:09,852 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 09:21:09,852 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:21:09,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1038663742] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:21:09,853 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:21:09,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:21:09,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946054059] [2023-08-04 09:21:09,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:21:09,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:21:09,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:21:09,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:21:09,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:21:09,864 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 438 [2023-08-04 09:21:09,864 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 48 transitions, 142 flow. Second operand has 3 states, 3 states have (on average 198.33333333333334) internal successors, (595), 3 states have internal predecessors, (595), 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 09:21:09,865 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:21:09,865 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 438 [2023-08-04 09:21:09,865 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:21:10,004 INFO L124 PetriNetUnfolderBase]: 1122/1617 cut-off events. [2023-08-04 09:21:10,004 INFO L125 PetriNetUnfolderBase]: For 121/121 co-relation queries the response was YES. [2023-08-04 09:21:10,006 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3463 conditions, 1617 events. 1122/1617 cut-off events. For 121/121 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 6343 event pairs, 454 based on Foata normal form. 0/1037 useless extension candidates. Maximal degree in co-relation 1414. Up to 1281 conditions per place. [2023-08-04 09:21:10,010 INFO L140 encePairwiseOnDemand]: 435/438 looper letters, 51 selfloop transitions, 2 changer transitions 0/59 dead transitions. [2023-08-04 09:21:10,010 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 59 transitions, 276 flow [2023-08-04 09:21:10,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:21:10,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:21:10,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 626 transitions. [2023-08-04 09:21:10,012 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4764079147640791 [2023-08-04 09:21:10,012 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 626 transitions. [2023-08-04 09:21:10,012 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 626 transitions. [2023-08-04 09:21:10,012 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:21:10,012 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 626 transitions. [2023-08-04 09:21:10,013 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 208.66666666666666) internal successors, (626), 3 states have internal predecessors, (626), 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 09:21:10,015 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 438.0) internal successors, (1752), 4 states have internal predecessors, (1752), 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 09:21:10,015 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 438.0) internal successors, (1752), 4 states have internal predecessors, (1752), 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 09:21:10,015 INFO L175 Difference]: Start difference. First operand has 43 places, 48 transitions, 142 flow. Second operand 3 states and 626 transitions. [2023-08-04 09:21:10,015 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 59 transitions, 276 flow [2023-08-04 09:21:10,016 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 59 transitions, 274 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:21:10,017 INFO L231 Difference]: Finished difference. Result has 45 places, 49 transitions, 152 flow [2023-08-04 09:21:10,017 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=152, PETRI_PLACES=45, PETRI_TRANSITIONS=49} [2023-08-04 09:21:10,018 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 1 predicate places. [2023-08-04 09:21:10,018 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 49 transitions, 152 flow [2023-08-04 09:21:10,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 198.33333333333334) internal successors, (595), 3 states have internal predecessors, (595), 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 09:21:10,018 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:21:10,018 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] [2023-08-04 09:21:10,024 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 09:21:10,222 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 09:21:10,223 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:21:10,223 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:21:10,223 INFO L85 PathProgramCache]: Analyzing trace with hash 1343950339, now seen corresponding path program 1 times [2023-08-04 09:21:10,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:21:10,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304562102] [2023-08-04 09:21:10,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:21:10,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:21:10,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:21:10,260 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 09:21:10,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:21:10,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304562102] [2023-08-04 09:21:10,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304562102] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:21:10,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976576621] [2023-08-04 09:21:10,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:21:10,261 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:21:10,261 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:21:10,261 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 09:21:10,263 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 09:21:10,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:21:10,338 INFO L262 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:21:10,339 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:21:10,348 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 09:21:10,348 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:21:10,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1976576621] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:21:10,348 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:21:10,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-08-04 09:21:10,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619464790] [2023-08-04 09:21:10,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:21:10,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:21:10,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:21:10,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:21:10,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:21:10,356 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 438 [2023-08-04 09:21:10,356 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 49 transitions, 152 flow. Second operand has 3 states, 3 states have (on average 199.66666666666666) internal successors, (599), 3 states have internal predecessors, (599), 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 09:21:10,356 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:21:10,356 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 438 [2023-08-04 09:21:10,356 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:21:10,532 INFO L124 PetriNetUnfolderBase]: 1109/1597 cut-off events. [2023-08-04 09:21:10,532 INFO L125 PetriNetUnfolderBase]: For 124/124 co-relation queries the response was YES. [2023-08-04 09:21:10,534 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3465 conditions, 1597 events. 1109/1597 cut-off events. For 124/124 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 6207 event pairs, 527 based on Foata normal form. 0/1042 useless extension candidates. Maximal degree in co-relation 2564. Up to 1489 conditions per place. [2023-08-04 09:21:10,537 INFO L140 encePairwiseOnDemand]: 435/438 looper letters, 45 selfloop transitions, 2 changer transitions 3/56 dead transitions. [2023-08-04 09:21:10,537 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 56 transitions, 266 flow [2023-08-04 09:21:10,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:21:10,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:21:10,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 622 transitions. [2023-08-04 09:21:10,539 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4733637747336377 [2023-08-04 09:21:10,539 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 622 transitions. [2023-08-04 09:21:10,539 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 622 transitions. [2023-08-04 09:21:10,539 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:21:10,539 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 622 transitions. [2023-08-04 09:21:10,540 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 207.33333333333334) internal successors, (622), 3 states have internal predecessors, (622), 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 09:21:10,542 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 438.0) internal successors, (1752), 4 states have internal predecessors, (1752), 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 09:21:10,543 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 438.0) internal successors, (1752), 4 states have internal predecessors, (1752), 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 09:21:10,543 INFO L175 Difference]: Start difference. First operand has 45 places, 49 transitions, 152 flow. Second operand 3 states and 622 transitions. [2023-08-04 09:21:10,543 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 56 transitions, 266 flow [2023-08-04 09:21:10,546 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 56 transitions, 264 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:21:10,546 INFO L231 Difference]: Finished difference. Result has 47 places, 47 transitions, 150 flow [2023-08-04 09:21:10,547 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=150, PETRI_PLACES=47, PETRI_TRANSITIONS=47} [2023-08-04 09:21:10,547 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 3 predicate places. [2023-08-04 09:21:10,547 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 47 transitions, 150 flow [2023-08-04 09:21:10,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 199.66666666666666) internal successors, (599), 3 states have internal predecessors, (599), 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 09:21:10,548 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:21:10,548 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] [2023-08-04 09:21:10,568 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 09:21:10,752 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 09:21:10,752 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:21:10,753 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:21:10,753 INFO L85 PathProgramCache]: Analyzing trace with hash 1325695848, now seen corresponding path program 1 times [2023-08-04 09:21:10,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:21:10,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471090358] [2023-08-04 09:21:10,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:21:10,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:21:10,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:21:10,790 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 09:21:10,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:21:10,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471090358] [2023-08-04 09:21:10,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471090358] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:21:10,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534008088] [2023-08-04 09:21:10,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:21:10,791 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:21:10,791 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:21:10,792 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 09:21:10,794 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 09:21:10,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:21:10,874 INFO L262 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 09:21:10,875 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:21:10,897 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 09:21:10,897 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 09:21:10,910 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 09:21:10,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [534008088] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 09:21:10,910 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 09:21:10,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 09:21:10,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326091127] [2023-08-04 09:21:10,911 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 09:21:10,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 09:21:10,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:21:10,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 09:21:10,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:21:10,921 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 190 out of 438 [2023-08-04 09:21:10,922 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 47 transitions, 150 flow. Second operand has 5 states, 5 states have (on average 197.0) internal successors, (985), 5 states have internal predecessors, (985), 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 09:21:10,922 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:21:10,922 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 190 of 438 [2023-08-04 09:21:10,922 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:21:10,940 INFO L124 PetriNetUnfolderBase]: 10/23 cut-off events. [2023-08-04 09:21:10,940 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-04 09:21:10,940 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60 conditions, 23 events. 10/23 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 25 event pairs, 1 based on Foata normal form. 3/20 useless extension candidates. Maximal degree in co-relation 48. Up to 13 conditions per place. [2023-08-04 09:21:10,940 INFO L140 encePairwiseOnDemand]: 435/438 looper letters, 0 selfloop transitions, 0 changer transitions 14/14 dead transitions. [2023-08-04 09:21:10,940 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 14 transitions, 58 flow [2023-08-04 09:21:10,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 09:21:10,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 09:21:10,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 774 transitions. [2023-08-04 09:21:10,942 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4417808219178082 [2023-08-04 09:21:10,942 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 774 transitions. [2023-08-04 09:21:10,942 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 774 transitions. [2023-08-04 09:21:10,943 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:21:10,943 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 774 transitions. [2023-08-04 09:21:10,944 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 193.5) internal successors, (774), 4 states have internal predecessors, (774), 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 09:21:10,945 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 438.0) internal successors, (2190), 5 states have internal predecessors, (2190), 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 09:21:10,946 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 438.0) internal successors, (2190), 5 states have internal predecessors, (2190), 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 09:21:10,946 INFO L175 Difference]: Start difference. First operand has 47 places, 47 transitions, 150 flow. Second operand 4 states and 774 transitions. [2023-08-04 09:21:10,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 14 transitions, 58 flow [2023-08-04 09:21:10,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 14 transitions, 56 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:21:10,946 INFO L231 Difference]: Finished difference. Result has 21 places, 0 transitions, 0 flow [2023-08-04 09:21:10,946 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=438, PETRI_DIFFERENCE_MINUEND_FLOW=24, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=11, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=21, PETRI_TRANSITIONS=0} [2023-08-04 09:21:10,947 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, -23 predicate places. [2023-08-04 09:21:10,947 INFO L495 AbstractCegarLoop]: Abstraction has has 21 places, 0 transitions, 0 flow [2023-08-04 09:21:10,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 197.0) internal successors, (985), 5 states have internal predecessors, (985), 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 09:21:10,949 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-04 09:21:10,963 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 09:21:11,153 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 09:21:11,153 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:21:11,155 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-04 09:21:11,157 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 204 places, 228 transitions, 498 flow [2023-08-04 09:21:11,191 INFO L124 PetriNetUnfolderBase]: 105/696 cut-off events. [2023-08-04 09:21:11,191 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-04 09:21:11,193 INFO L83 FinitePrefix]: Finished finitePrefix Result has 757 conditions, 696 events. 105/696 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 3258 event pairs, 0 based on Foata normal form. 0/581 useless extension candidates. Maximal degree in co-relation 407. Up to 16 conditions per place. [2023-08-04 09:21:11,193 INFO L82 GeneralOperation]: Start removeDead. Operand has 204 places, 228 transitions, 498 flow [2023-08-04 09:21:11,195 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 204 places, 228 transitions, 498 flow [2023-08-04 09:21:11,195 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 09:21:11,195 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 204 places, 228 transitions, 498 flow [2023-08-04 09:21:11,195 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 204 places, 228 transitions, 498 flow [2023-08-04 09:21:11,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 204 places, 228 transitions, 498 flow [2023-08-04 09:21:11,228 INFO L124 PetriNetUnfolderBase]: 105/696 cut-off events. [2023-08-04 09:21:11,228 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-04 09:21:11,229 INFO L83 FinitePrefix]: Finished finitePrefix Result has 757 conditions, 696 events. 105/696 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 3258 event pairs, 0 based on Foata normal form. 0/581 useless extension candidates. Maximal degree in co-relation 407. Up to 16 conditions per place. [2023-08-04 09:21:11,234 INFO L119 LiptonReduction]: Number of co-enabled transitions 5220 [2023-08-04 09:21:16,898 INFO L134 LiptonReduction]: Checked pairs total: 8777 [2023-08-04 09:21:16,899 INFO L136 LiptonReduction]: Total number of compositions: 209 [2023-08-04 09:21:16,900 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 09:21:16,900 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;@7ea530b4, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 09:21:16,900 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-04 09:21:16,903 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 09:21:16,903 INFO L124 PetriNetUnfolderBase]: 5/35 cut-off events. [2023-08-04 09:21:16,903 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 09:21:16,903 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:21:16,903 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-08-04 09:21:16,903 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 09:21:16,903 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:21:16,903 INFO L85 PathProgramCache]: Analyzing trace with hash -1632189214, now seen corresponding path program 1 times [2023-08-04 09:21:16,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:21:16,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938573545] [2023-08-04 09:21:16,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:21:16,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:21:16,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:21:16,984 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 09:21:16,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:21:16,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938573545] [2023-08-04 09:21:16,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938573545] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:21:16,984 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 09:21:16,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 09:21:16,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124564650] [2023-08-04 09:21:16,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:21:16,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 09:21:16,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:21:16,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 09:21:16,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-04 09:21:17,027 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 437 [2023-08-04 09:21:17,027 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 51 transitions, 144 flow. Second operand has 4 states, 4 states have (on average 186.5) internal successors, (746), 4 states have internal predecessors, (746), 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 09:21:17,027 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:21:17,027 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 437 [2023-08-04 09:21:17,027 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:21:17,254 INFO L124 PetriNetUnfolderBase]: 2294/3242 cut-off events. [2023-08-04 09:21:17,254 INFO L125 PetriNetUnfolderBase]: For 200/200 co-relation queries the response was YES. [2023-08-04 09:21:17,257 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6548 conditions, 3242 events. 2294/3242 cut-off events. For 200/200 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 15102 event pairs, 1048 based on Foata normal form. 1/1869 useless extension candidates. Maximal degree in co-relation 4989. Up to 3071 conditions per place. [2023-08-04 09:21:17,263 INFO L140 encePairwiseOnDemand]: 431/437 looper letters, 20 selfloop transitions, 4 changer transitions 23/53 dead transitions. [2023-08-04 09:21:17,263 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 53 transitions, 236 flow [2023-08-04 09:21:17,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 09:21:17,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 09:21:17,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 788 transitions. [2023-08-04 09:21:17,265 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45080091533180777 [2023-08-04 09:21:17,265 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 788 transitions. [2023-08-04 09:21:17,265 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 788 transitions. [2023-08-04 09:21:17,265 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:21:17,265 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 788 transitions. [2023-08-04 09:21:17,266 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 197.0) internal successors, (788), 4 states have internal predecessors, (788), 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 09:21:17,268 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 437.0) internal successors, (2185), 5 states have internal predecessors, (2185), 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 09:21:17,268 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 437.0) internal successors, (2185), 5 states have internal predecessors, (2185), 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 09:21:17,268 INFO L175 Difference]: Start difference. First operand has 44 places, 51 transitions, 144 flow. Second operand 4 states and 788 transitions. [2023-08-04 09:21:17,269 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 53 transitions, 236 flow [2023-08-04 09:21:17,269 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 53 transitions, 236 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 09:21:17,270 INFO L231 Difference]: Finished difference. Result has 48 places, 30 transitions, 97 flow [2023-08-04 09:21:17,270 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=437, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=97, PETRI_PLACES=48, PETRI_TRANSITIONS=30} [2023-08-04 09:21:17,272 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 4 predicate places. [2023-08-04 09:21:17,272 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 30 transitions, 97 flow [2023-08-04 09:21:17,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 186.5) internal successors, (746), 4 states have internal predecessors, (746), 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 09:21:17,272 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:21:17,272 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:21:17,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-04 09:21:17,272 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 09:21:17,273 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:21:17,273 INFO L85 PathProgramCache]: Analyzing trace with hash 394186993, now seen corresponding path program 1 times [2023-08-04 09:21:17,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:21:17,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746997304] [2023-08-04 09:21:17,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:21:17,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:21:17,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 09:21:17,322 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 09:21:17,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 09:21:17,375 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 09:21:17,375 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 09:21:17,375 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-04 09:21:17,375 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-04 09:21:17,375 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-04 09:21:17,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-04 09:21:17,376 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-04 09:21:17,376 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN,UNKNOWN (2/2) [2023-08-04 09:21:17,376 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 09:21:17,376 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 09:21:17,406 INFO L144 ThreadInstanceAdder]: Constructed 18 joinOtherThreadTransitions. [2023-08-04 09:21:17,408 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 237 places, 270 transitions, 630 flow [2023-08-04 09:21:17,730 INFO L124 PetriNetUnfolderBase]: 895/4185 cut-off events. [2023-08-04 09:21:17,731 INFO L125 PetriNetUnfolderBase]: For 602/602 co-relation queries the response was YES. [2023-08-04 09:21:17,758 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4859 conditions, 4185 events. 895/4185 cut-off events. For 602/602 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 33261 event pairs, 22 based on Foata normal form. 0/3534 useless extension candidates. Maximal degree in co-relation 2502. Up to 192 conditions per place. [2023-08-04 09:21:17,758 INFO L82 GeneralOperation]: Start removeDead. Operand has 237 places, 270 transitions, 630 flow [2023-08-04 09:21:17,776 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 237 places, 270 transitions, 630 flow [2023-08-04 09:21:17,776 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 09:21:17,776 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 237 places, 270 transitions, 630 flow [2023-08-04 09:21:17,776 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 237 places, 270 transitions, 630 flow [2023-08-04 09:21:17,776 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 237 places, 270 transitions, 630 flow [2023-08-04 09:21:18,132 INFO L124 PetriNetUnfolderBase]: 895/4185 cut-off events. [2023-08-04 09:21:18,133 INFO L125 PetriNetUnfolderBase]: For 602/602 co-relation queries the response was YES. [2023-08-04 09:21:18,159 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4859 conditions, 4185 events. 895/4185 cut-off events. For 602/602 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 33261 event pairs, 22 based on Foata normal form. 0/3534 useless extension candidates. Maximal degree in co-relation 2502. Up to 192 conditions per place. [2023-08-04 09:21:18,215 INFO L119 LiptonReduction]: Number of co-enabled transitions 13500 [2023-08-04 09:21:24,471 INFO L134 LiptonReduction]: Checked pairs total: 26913 [2023-08-04 09:21:24,471 INFO L136 LiptonReduction]: Total number of compositions: 232 [2023-08-04 09:21:24,472 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 09:21:24,473 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;@7ea530b4, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 09:21:24,473 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 09:21:24,475 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 09:21:24,475 INFO L124 PetriNetUnfolderBase]: 5/35 cut-off events. [2023-08-04 09:21:24,475 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-04 09:21:24,475 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:21:24,475 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:21:24,475 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:21:24,475 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:21:24,475 INFO L85 PathProgramCache]: Analyzing trace with hash -311986961, now seen corresponding path program 1 times [2023-08-04 09:21:24,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:21:24,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123246774] [2023-08-04 09:21:24,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:21:24,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:21:24,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:21:24,521 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 09:21:24,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:21:24,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123246774] [2023-08-04 09:21:24,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123246774] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:21:24,521 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 09:21:24,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 09:21:24,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185934818] [2023-08-04 09:21:24,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:21:24,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:21:24,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:21:24,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:21:24,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 09:21:24,531 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 215 out of 502 [2023-08-04 09:21:24,532 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 75 transitions, 240 flow. Second operand has 3 states, 3 states have (on average 218.0) internal successors, (654), 3 states have internal predecessors, (654), 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 09:21:24,532 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:21:24,532 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 215 of 502 [2023-08-04 09:21:24,532 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:21:49,464 INFO L124 PetriNetUnfolderBase]: 282560/337067 cut-off events. [2023-08-04 09:21:49,464 INFO L125 PetriNetUnfolderBase]: For 35646/35646 co-relation queries the response was YES. [2023-08-04 09:21:50,195 INFO L83 FinitePrefix]: Finished finitePrefix Result has 685347 conditions, 337067 events. 282560/337067 cut-off events. For 35646/35646 co-relation queries the response was YES. Maximal size of possible extension queue 6293. Compared 1585546 event pairs, 121223 based on Foata normal form. 0/188808 useless extension candidates. Maximal degree in co-relation 224681. Up to 327395 conditions per place. [2023-08-04 09:21:51,290 INFO L140 encePairwiseOnDemand]: 498/502 looper letters, 61 selfloop transitions, 2 changer transitions 3/78 dead transitions. [2023-08-04 09:21:51,290 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 78 transitions, 372 flow [2023-08-04 09:21:51,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:21:51,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:21:51,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 710 transitions. [2023-08-04 09:21:51,292 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4714475431606906 [2023-08-04 09:21:51,292 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 710 transitions. [2023-08-04 09:21:51,292 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 710 transitions. [2023-08-04 09:21:51,292 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:21:51,292 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 710 transitions. [2023-08-04 09:21:51,293 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 236.66666666666666) internal successors, (710), 3 states have internal predecessors, (710), 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 09:21:51,296 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 502.0) internal successors, (2008), 4 states have internal predecessors, (2008), 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 09:21:51,297 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 502.0) internal successors, (2008), 4 states have internal predecessors, (2008), 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 09:21:51,297 INFO L175 Difference]: Start difference. First operand has 62 places, 75 transitions, 240 flow. Second operand 3 states and 710 transitions. [2023-08-04 09:21:51,297 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 78 transitions, 372 flow [2023-08-04 09:21:51,311 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 78 transitions, 372 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 09:21:51,312 INFO L231 Difference]: Finished difference. Result has 64 places, 72 transitions, 232 flow [2023-08-04 09:21:51,312 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=502, PETRI_DIFFERENCE_MINUEND_FLOW=238, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=232, PETRI_PLACES=64, PETRI_TRANSITIONS=72} [2023-08-04 09:21:51,313 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, 2 predicate places. [2023-08-04 09:21:51,313 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 72 transitions, 232 flow [2023-08-04 09:21:51,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 218.0) internal successors, (654), 3 states have internal predecessors, (654), 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 09:21:51,313 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:21:51,313 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:21:51,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-04 09:21:51,313 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:21:51,314 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:21:51,314 INFO L85 PathProgramCache]: Analyzing trace with hash 784271114, now seen corresponding path program 1 times [2023-08-04 09:21:51,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:21:51,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506598756] [2023-08-04 09:21:51,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:21:51,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:21:51,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:21:51,343 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 09:21:51,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:21:51,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506598756] [2023-08-04 09:21:51,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506598756] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:21:51,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004425574] [2023-08-04 09:21:51,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:21:51,344 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:21:51,344 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:21:51,345 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 09:21:51,347 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 09:21:51,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:21:51,433 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:21:51,433 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:21:51,440 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 09:21:51,440 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:21:51,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2004425574] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:21:51,440 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:21:51,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:21:51,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515077357] [2023-08-04 09:21:51,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:21:51,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:21:51,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:21:51,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:21:51,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:21:51,447 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 215 out of 502 [2023-08-04 09:21:51,448 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 72 transitions, 232 flow. Second operand has 3 states, 3 states have (on average 219.0) internal successors, (657), 3 states have internal predecessors, (657), 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 09:21:51,448 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:21:51,448 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 215 of 502 [2023-08-04 09:21:51,448 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:22:14,982 INFO L124 PetriNetUnfolderBase]: 278802/332184 cut-off events. [2023-08-04 09:22:14,982 INFO L125 PetriNetUnfolderBase]: For 33900/33900 co-relation queries the response was YES. [2023-08-04 09:22:15,929 INFO L83 FinitePrefix]: Finished finitePrefix Result has 675363 conditions, 332184 events. 278802/332184 cut-off events. For 33900/33900 co-relation queries the response was YES. Maximal size of possible extension queue 6490. Compared 1569028 event pairs, 119881 based on Foata normal form. 0/185955 useless extension candidates. Maximal degree in co-relation 675323. Up to 322816 conditions per place. [2023-08-04 09:22:17,081 INFO L140 encePairwiseOnDemand]: 499/502 looper letters, 66 selfloop transitions, 2 changer transitions 0/80 dead transitions. [2023-08-04 09:22:17,081 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 80 transitions, 384 flow [2023-08-04 09:22:17,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:22:17,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:22:17,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 713 transitions. [2023-08-04 09:22:17,083 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47343957503320055 [2023-08-04 09:22:17,083 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 713 transitions. [2023-08-04 09:22:17,083 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 713 transitions. [2023-08-04 09:22:17,083 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:22:17,083 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 713 transitions. [2023-08-04 09:22:17,084 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 237.66666666666666) internal successors, (713), 3 states have internal predecessors, (713), 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 09:22:17,086 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 502.0) internal successors, (2008), 4 states have internal predecessors, (2008), 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 09:22:17,086 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 502.0) internal successors, (2008), 4 states have internal predecessors, (2008), 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 09:22:17,086 INFO L175 Difference]: Start difference. First operand has 64 places, 72 transitions, 232 flow. Second operand 3 states and 713 transitions. [2023-08-04 09:22:17,086 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 80 transitions, 384 flow [2023-08-04 09:22:17,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 80 transitions, 370 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-04 09:22:17,168 INFO L231 Difference]: Finished difference. Result has 60 places, 73 transitions, 230 flow [2023-08-04 09:22:17,168 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=502, PETRI_DIFFERENCE_MINUEND_FLOW=218, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=230, PETRI_PLACES=60, PETRI_TRANSITIONS=73} [2023-08-04 09:22:17,168 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, -2 predicate places. [2023-08-04 09:22:17,168 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 73 transitions, 230 flow [2023-08-04 09:22:17,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 219.0) internal successors, (657), 3 states have internal predecessors, (657), 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 09:22:17,168 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:22:17,169 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:22:17,173 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-08-04 09:22:17,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:22:17,373 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:22:17,373 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:22:17,373 INFO L85 PathProgramCache]: Analyzing trace with hash 364710433, now seen corresponding path program 1 times [2023-08-04 09:22:17,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:22:17,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164406171] [2023-08-04 09:22:17,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:22:17,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:22:17,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:22:17,414 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 09:22:17,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:22:17,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164406171] [2023-08-04 09:22:17,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164406171] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:22:17,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360260989] [2023-08-04 09:22:17,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:22:17,415 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:22:17,415 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:22:17,427 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 09:22:17,428 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-04 09:22:17,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:22:17,523 INFO L262 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:22:17,523 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:22:17,527 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 09:22:17,527 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:22:17,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [360260989] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:22:17,528 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:22:17,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:22:17,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029295907] [2023-08-04 09:22:17,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:22:17,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:22:17,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:22:17,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:22:17,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:22:17,538 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 215 out of 502 [2023-08-04 09:22:17,538 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 73 transitions, 230 flow. Second operand has 3 states, 3 states have (on average 220.0) internal successors, (660), 3 states have internal predecessors, (660), 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 09:22:17,538 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:22:17,538 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 215 of 502 [2023-08-04 09:22:17,538 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:22:40,458 INFO L124 PetriNetUnfolderBase]: 278204/333668 cut-off events. [2023-08-04 09:22:40,458 INFO L125 PetriNetUnfolderBase]: For 14341/14341 co-relation queries the response was YES. [2023-08-04 09:22:41,372 INFO L83 FinitePrefix]: Finished finitePrefix Result has 675999 conditions, 333668 events. 278204/333668 cut-off events. For 14341/14341 co-relation queries the response was YES. Maximal size of possible extension queue 7023. Compared 1665949 event pairs, 118847 based on Foata normal form. 0/187954 useless extension candidates. Maximal degree in co-relation 233318. Up to 318916 conditions per place. [2023-08-04 09:22:42,515 INFO L140 encePairwiseOnDemand]: 499/502 looper letters, 71 selfloop transitions, 2 changer transitions 0/85 dead transitions. [2023-08-04 09:22:42,516 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 85 transitions, 400 flow [2023-08-04 09:22:42,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:22:42,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:22:42,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 717 transitions. [2023-08-04 09:22:42,517 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4760956175298805 [2023-08-04 09:22:42,518 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 717 transitions. [2023-08-04 09:22:42,518 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 717 transitions. [2023-08-04 09:22:42,518 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:22:42,518 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 717 transitions. [2023-08-04 09:22:42,519 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 239.0) internal successors, (717), 3 states have internal predecessors, (717), 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 09:22:42,521 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 502.0) internal successors, (2008), 4 states have internal predecessors, (2008), 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 09:22:42,521 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 502.0) internal successors, (2008), 4 states have internal predecessors, (2008), 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 09:22:42,521 INFO L175 Difference]: Start difference. First operand has 60 places, 73 transitions, 230 flow. Second operand 3 states and 717 transitions. [2023-08-04 09:22:42,521 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 85 transitions, 400 flow [2023-08-04 09:22:42,528 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 85 transitions, 398 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:22:42,529 INFO L231 Difference]: Finished difference. Result has 62 places, 74 transitions, 240 flow [2023-08-04 09:22:42,529 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=502, PETRI_DIFFERENCE_MINUEND_FLOW=228, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=240, PETRI_PLACES=62, PETRI_TRANSITIONS=74} [2023-08-04 09:22:42,530 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, 0 predicate places. [2023-08-04 09:22:42,530 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 74 transitions, 240 flow [2023-08-04 09:22:42,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 220.0) internal successors, (660), 3 states have internal predecessors, (660), 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 09:22:42,530 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:22:42,530 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] [2023-08-04 09:22:42,535 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-04 09:22:42,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-08-04 09:22:42,735 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:22:42,736 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:22:42,736 INFO L85 PathProgramCache]: Analyzing trace with hash -108712595, now seen corresponding path program 1 times [2023-08-04 09:22:42,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:22:42,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369342732] [2023-08-04 09:22:42,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:22:42,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:22:42,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:22:42,772 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 09:22:42,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:22:42,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369342732] [2023-08-04 09:22:42,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369342732] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:22:42,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274995987] [2023-08-04 09:22:42,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:22:42,772 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:22:42,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:22:42,773 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 09:22:42,775 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-04 09:22:42,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:22:42,857 INFO L262 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:22:42,857 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:22:42,866 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 09:22:42,866 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:22:42,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [274995987] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:22:42,867 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:22:42,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:22:42,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089202338] [2023-08-04 09:22:42,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:22:42,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:22:42,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:22:42,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:22:42,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:22:42,880 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 215 out of 502 [2023-08-04 09:22:42,880 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 74 transitions, 240 flow. Second operand has 3 states, 3 states have (on average 221.0) internal successors, (663), 3 states have internal predecessors, (663), 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 09:22:42,880 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:22:42,880 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 215 of 502 [2023-08-04 09:22:42,880 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:23:04,929 INFO L124 PetriNetUnfolderBase]: 246599/297050 cut-off events. [2023-08-04 09:23:04,929 INFO L125 PetriNetUnfolderBase]: For 13326/13326 co-relation queries the response was YES. [2023-08-04 09:23:05,808 INFO L83 FinitePrefix]: Finished finitePrefix Result has 606631 conditions, 297050 events. 246599/297050 cut-off events. For 13326/13326 co-relation queries the response was YES. Maximal size of possible extension queue 6223. Compared 1488735 event pairs, 95714 based on Foata normal form. 0/169879 useless extension candidates. Maximal degree in co-relation 225285. Up to 240769 conditions per place. [2023-08-04 09:23:06,809 INFO L140 encePairwiseOnDemand]: 499/502 looper letters, 80 selfloop transitions, 2 changer transitions 0/94 dead transitions. [2023-08-04 09:23:06,809 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 94 transitions, 459 flow [2023-08-04 09:23:06,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:23:06,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:23:06,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 725 transitions. [2023-08-04 09:23:06,811 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4814077025232404 [2023-08-04 09:23:06,811 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 725 transitions. [2023-08-04 09:23:06,811 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 725 transitions. [2023-08-04 09:23:06,812 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:23:06,812 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 725 transitions. [2023-08-04 09:23:06,813 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 241.66666666666666) internal successors, (725), 3 states have internal predecessors, (725), 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 09:23:06,814 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 502.0) internal successors, (2008), 4 states have internal predecessors, (2008), 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 09:23:06,815 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 502.0) internal successors, (2008), 4 states have internal predecessors, (2008), 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 09:23:06,815 INFO L175 Difference]: Start difference. First operand has 62 places, 74 transitions, 240 flow. Second operand 3 states and 725 transitions. [2023-08-04 09:23:06,815 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 94 transitions, 459 flow [2023-08-04 09:23:06,823 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 94 transitions, 457 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:23:06,824 INFO L231 Difference]: Finished difference. Result has 64 places, 75 transitions, 250 flow [2023-08-04 09:23:06,824 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=502, PETRI_DIFFERENCE_MINUEND_FLOW=238, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=250, PETRI_PLACES=64, PETRI_TRANSITIONS=75} [2023-08-04 09:23:06,825 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, 2 predicate places. [2023-08-04 09:23:06,825 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 75 transitions, 250 flow [2023-08-04 09:23:06,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 221.0) internal successors, (663), 3 states have internal predecessors, (663), 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 09:23:06,825 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:23:06,825 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] [2023-08-04 09:23:06,834 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-08-04 09:23:07,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-08-04 09:23:07,031 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:23:07,031 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:23:07,031 INFO L85 PathProgramCache]: Analyzing trace with hash -1155507656, now seen corresponding path program 1 times [2023-08-04 09:23:07,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:23:07,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619429977] [2023-08-04 09:23:07,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:23:07,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:23:07,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:23:07,072 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 09:23:07,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:23:07,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619429977] [2023-08-04 09:23:07,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619429977] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:23:07,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840091262] [2023-08-04 09:23:07,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:23:07,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:23:07,073 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:23:07,089 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 09:23:07,093 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-04 09:23:07,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:23:07,185 INFO L262 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:23:07,186 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:23:07,192 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 09:23:07,192 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:23:07,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [840091262] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:23:07,193 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:23:07,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:23:07,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546197404] [2023-08-04 09:23:07,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:23:07,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:23:07,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:23:07,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:23:07,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:23:07,211 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 215 out of 502 [2023-08-04 09:23:07,212 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 75 transitions, 250 flow. Second operand has 3 states, 3 states have (on average 222.33333333333334) internal successors, (667), 3 states have internal predecessors, (667), 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 09:23:07,212 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:23:07,212 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 215 of 502 [2023-08-04 09:23:07,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:23:27,070 INFO L124 PetriNetUnfolderBase]: 229468/278321 cut-off events. [2023-08-04 09:23:27,070 INFO L125 PetriNetUnfolderBase]: For 26311/26311 co-relation queries the response was YES. [2023-08-04 09:23:27,863 INFO L83 FinitePrefix]: Finished finitePrefix Result has 581619 conditions, 278321 events. 229468/278321 cut-off events. For 26311/26311 co-relation queries the response was YES. Maximal size of possible extension queue 5092. Compared 1407573 event pairs, 86967 based on Foata normal form. 0/164957 useless extension candidates. Maximal degree in co-relation 229378. Up to 211357 conditions per place. [2023-08-04 09:23:28,717 INFO L140 encePairwiseOnDemand]: 499/502 looper letters, 81 selfloop transitions, 2 changer transitions 0/95 dead transitions. [2023-08-04 09:23:28,717 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 95 transitions, 471 flow [2023-08-04 09:23:28,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:23:28,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:23:28,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 725 transitions. [2023-08-04 09:23:28,719 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4814077025232404 [2023-08-04 09:23:28,719 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 725 transitions. [2023-08-04 09:23:28,719 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 725 transitions. [2023-08-04 09:23:28,719 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:23:28,719 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 725 transitions. [2023-08-04 09:23:28,720 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 241.66666666666666) internal successors, (725), 3 states have internal predecessors, (725), 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 09:23:28,722 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 502.0) internal successors, (2008), 4 states have internal predecessors, (2008), 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 09:23:28,722 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 502.0) internal successors, (2008), 4 states have internal predecessors, (2008), 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 09:23:28,722 INFO L175 Difference]: Start difference. First operand has 64 places, 75 transitions, 250 flow. Second operand 3 states and 725 transitions. [2023-08-04 09:23:28,722 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 95 transitions, 471 flow [2023-08-04 09:23:29,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 95 transitions, 469 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:23:29,024 INFO L231 Difference]: Finished difference. Result has 66 places, 76 transitions, 260 flow [2023-08-04 09:23:29,024 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=502, PETRI_DIFFERENCE_MINUEND_FLOW=248, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=260, PETRI_PLACES=66, PETRI_TRANSITIONS=76} [2023-08-04 09:23:29,025 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, 4 predicate places. [2023-08-04 09:23:29,025 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 76 transitions, 260 flow [2023-08-04 09:23:29,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 222.33333333333334) internal successors, (667), 3 states have internal predecessors, (667), 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 09:23:29,025 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:23:29,025 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 09:23:29,029 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-08-04 09:23:29,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-08-04 09:23:29,230 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:23:29,230 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:23:29,230 INFO L85 PathProgramCache]: Analyzing trace with hash -2133294915, now seen corresponding path program 1 times [2023-08-04 09:23:29,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:23:29,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889023071] [2023-08-04 09:23:29,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:23:29,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:23:29,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:23:29,268 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 09:23:29,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:23:29,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889023071] [2023-08-04 09:23:29,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889023071] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:23:29,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139834959] [2023-08-04 09:23:29,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:23:29,268 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:23:29,268 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:23:29,269 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 09:23:29,271 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-04 09:23:29,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:23:29,369 INFO L262 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:23:29,370 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:23:29,376 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 09:23:29,376 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:23:29,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1139834959] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:23:29,376 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:23:29,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-08-04 09:23:29,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257395926] [2023-08-04 09:23:29,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:23:29,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:23:29,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:23:29,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:23:29,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:23:29,384 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 215 out of 502 [2023-08-04 09:23:29,384 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 76 transitions, 260 flow. Second operand has 3 states, 3 states have (on average 223.66666666666666) internal successors, (671), 3 states have internal predecessors, (671), 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 09:23:29,385 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:23:29,385 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 215 of 502 [2023-08-04 09:23:29,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand