/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 INSUFFICIENT_FIRST -tc /storage/repos/CAV22/benchmarks/AutomizerCInline.xml -i /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-two-queue.wvr_bound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 03:27:52,945 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 03:27:53,021 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 03:27:53,025 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 03:27:53,026 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 03:27:53,026 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 03:27:53,027 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 03:27:53,049 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 03:27:53,049 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 03:27:53,050 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 03:27:53,050 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 03:27:53,050 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 03:27:53,051 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 03:27:53,051 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 03:27:53,052 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 03:27:53,052 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 03:27:53,052 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 03:27:53,053 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 03:27:53,053 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 03:27:53,053 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 03:27:53,054 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 03:27:53,054 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 03:27:53,055 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 03:27:53,055 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 03:27:53,055 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 03:27:53,056 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 03:27:53,056 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 03:27:53,056 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 03:27:53,057 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 03:27:53,057 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 03:27:53,057 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 03:27:53,058 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 03:27:53,058 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 03:27:53,058 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 03:27:53,058 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 03:27:53,059 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 03:27:53,059 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 03:27:53,059 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 03:27:53,059 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 03:27:53,060 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 03:27:53,060 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 03:27:53,060 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST [2023-08-04 03:27:53,306 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 03:27:53,330 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 03:27:53,332 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 03:27:53,333 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 03:27:53,334 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 03:27:53,335 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-two-queue.wvr_bound2.c [2023-08-04 03:27:54,451 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 03:27:54,633 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 03:27:54,633 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-two-queue.wvr_bound2.c [2023-08-04 03:27:54,640 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/134c92aa1/fa8454e8fbfa419dbc56a115900cf31c/FLAG17a49ed1b [2023-08-04 03:27:54,652 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/134c92aa1/fa8454e8fbfa419dbc56a115900cf31c [2023-08-04 03:27:54,655 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 03:27:54,656 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 03:27:54,657 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 03:27:54,657 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 03:27:54,662 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 03:27:54,663 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 03:27:54" (1/1) ... [2023-08-04 03:27:54,664 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@12154e74 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:27:54, skipping insertion in model container [2023-08-04 03:27:54,664 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 03:27:54" (1/1) ... [2023-08-04 03:27:54,684 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 03:27:54,838 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-two-queue.wvr_bound2.c[3149,3162] [2023-08-04 03:27:54,843 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 03:27:54,851 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 03:27:54,872 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-two-queue.wvr_bound2.c[3149,3162] [2023-08-04 03:27:54,875 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 03:27:54,886 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 03:27:54,886 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 03:27:54,891 INFO L206 MainTranslator]: Completed translation [2023-08-04 03:27:54,891 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:27:54 WrapperNode [2023-08-04 03:27:54,891 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 03:27:54,892 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 03:27:54,892 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 03:27:54,892 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 03:27:54,898 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:27:54" (1/1) ... [2023-08-04 03:27:54,905 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:27:54" (1/1) ... [2023-08-04 03:27:54,926 INFO L138 Inliner]: procedures = 24, calls = 43, calls flagged for inlining = 13, calls inlined = 15, statements flattened = 239 [2023-08-04 03:27:54,927 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 03:27:54,927 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 03:27:54,928 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 03:27:54,928 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 03:27:54,935 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:27:54" (1/1) ... [2023-08-04 03:27:54,936 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:27:54" (1/1) ... [2023-08-04 03:27:54,939 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:27:54" (1/1) ... [2023-08-04 03:27:54,939 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:27:54" (1/1) ... [2023-08-04 03:27:54,946 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:27:54" (1/1) ... [2023-08-04 03:27:54,950 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:27:54" (1/1) ... [2023-08-04 03:27:54,952 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:27:54" (1/1) ... [2023-08-04 03:27:54,953 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:27:54" (1/1) ... [2023-08-04 03:27:54,956 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 03:27:54,957 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 03:27:54,957 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 03:27:54,957 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 03:27:54,958 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:27:54" (1/1) ... [2023-08-04 03:27:54,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 03:27:54,975 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:27:54,988 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 03:27:54,998 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 03:27:55,022 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 03:27:55,026 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-04 03:27:55,026 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-04 03:27:55,026 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-04 03:27:55,027 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-04 03:27:55,027 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 03:27:55,027 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 03:27:55,027 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 03:27:55,027 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-04 03:27:55,027 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-04 03:27:55,027 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-04 03:27:55,027 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 03:27:55,028 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 03:27:55,028 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 03:27:55,028 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 03:27:55,029 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 03:27:55,119 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 03:27:55,121 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 03:27:55,390 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 03:27:55,532 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 03:27:55,532 INFO L302 CfgBuilder]: Removed 8 assume(true) statements. [2023-08-04 03:27:55,536 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 03:27:55 BoogieIcfgContainer [2023-08-04 03:27:55,536 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 03:27:55,549 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 03:27:55,549 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 03:27:55,552 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 03:27:55,553 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 03:27:54" (1/3) ... [2023-08-04 03:27:55,554 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a3a08e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 03:27:55, skipping insertion in model container [2023-08-04 03:27:55,554 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:27:54" (2/3) ... [2023-08-04 03:27:55,557 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a3a08e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 03:27:55, skipping insertion in model container [2023-08-04 03:27:55,558 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 03:27:55" (3/3) ... [2023-08-04 03:27:55,560 INFO L112 eAbstractionObserver]: Analyzing ICFG weaver_popl20-two-queue.wvr_bound2.c [2023-08-04 03:27:55,567 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 03:27:55,576 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 03:27:55,577 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 03:27:55,577 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 03:27:55,661 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-04 03:27:55,707 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 184 places, 200 transitions, 422 flow [2023-08-04 03:27:55,809 INFO L124 PetriNetUnfolderBase]: 40/340 cut-off events. [2023-08-04 03:27:55,810 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-04 03:27:55,817 INFO L83 FinitePrefix]: Finished finitePrefix Result has 360 conditions, 340 events. 40/340 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 877 event pairs, 0 based on Foata normal form. 0/290 useless extension candidates. Maximal degree in co-relation 218. Up to 8 conditions per place. [2023-08-04 03:27:55,817 INFO L82 GeneralOperation]: Start removeDead. Operand has 184 places, 200 transitions, 422 flow [2023-08-04 03:27:55,824 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 184 places, 200 transitions, 422 flow [2023-08-04 03:27:55,827 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 03:27:55,841 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 184 places, 200 transitions, 422 flow [2023-08-04 03:27:55,843 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 184 places, 200 transitions, 422 flow [2023-08-04 03:27:55,843 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 184 places, 200 transitions, 422 flow [2023-08-04 03:27:55,910 INFO L124 PetriNetUnfolderBase]: 40/340 cut-off events. [2023-08-04 03:27:55,910 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-04 03:27:55,914 INFO L83 FinitePrefix]: Finished finitePrefix Result has 360 conditions, 340 events. 40/340 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 877 event pairs, 0 based on Foata normal form. 0/290 useless extension candidates. Maximal degree in co-relation 218. Up to 8 conditions per place. [2023-08-04 03:27:55,918 INFO L119 LiptonReduction]: Number of co-enabled transitions 2400 [2023-08-04 03:28:01,763 INFO L134 LiptonReduction]: Checked pairs total: 4895 [2023-08-04 03:28:01,763 INFO L136 LiptonReduction]: Total number of compositions: 195 [2023-08-04 03:28:01,775 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 03:28:01,782 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;@5ed13567, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 03:28:01,782 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-04 03:28:01,789 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 03:28:01,789 INFO L124 PetriNetUnfolderBase]: 4/32 cut-off events. [2023-08-04 03:28:01,789 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 03:28:01,789 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:28:01,790 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-08-04 03:28:01,790 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 03:28:01,794 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:28:01,794 INFO L85 PathProgramCache]: Analyzing trace with hash 947611101, now seen corresponding path program 1 times [2023-08-04 03:28:01,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:28:01,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627166273] [2023-08-04 03:28:01,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:28:01,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:28:01,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 03:28:01,912 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 03:28:01,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 03:28:01,973 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 03:28:01,975 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 03:28:01,976 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-04 03:28:01,977 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-04 03:28:01,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 03:28:01,978 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-04 03:28:01,980 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN (1/2) [2023-08-04 03:28:01,981 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 03:28:01,981 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 03:28:02,007 INFO L144 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2023-08-04 03:28:02,011 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 206 places, 226 transitions, 500 flow [2023-08-04 03:28:02,129 INFO L124 PetriNetUnfolderBase]: 141/915 cut-off events. [2023-08-04 03:28:02,130 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2023-08-04 03:28:02,135 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1012 conditions, 915 events. 141/915 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 4245 event pairs, 2 based on Foata normal form. 0/771 useless extension candidates. Maximal degree in co-relation 573. Up to 32 conditions per place. [2023-08-04 03:28:02,135 INFO L82 GeneralOperation]: Start removeDead. Operand has 206 places, 226 transitions, 500 flow [2023-08-04 03:28:02,140 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 206 places, 226 transitions, 500 flow [2023-08-04 03:28:02,140 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 03:28:02,141 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 206 places, 226 transitions, 500 flow [2023-08-04 03:28:02,142 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 206 places, 226 transitions, 500 flow [2023-08-04 03:28:02,142 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 206 places, 226 transitions, 500 flow [2023-08-04 03:28:02,262 INFO L124 PetriNetUnfolderBase]: 141/915 cut-off events. [2023-08-04 03:28:02,262 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2023-08-04 03:28:02,266 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1012 conditions, 915 events. 141/915 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 4245 event pairs, 2 based on Foata normal form. 0/771 useless extension candidates. Maximal degree in co-relation 573. Up to 32 conditions per place. [2023-08-04 03:28:02,279 INFO L119 LiptonReduction]: Number of co-enabled transitions 6000 [2023-08-04 03:28:07,574 INFO L134 LiptonReduction]: Checked pairs total: 27582 [2023-08-04 03:28:07,574 INFO L136 LiptonReduction]: Total number of compositions: 195 [2023-08-04 03:28:07,577 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 03:28:07,578 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;@5ed13567, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 03:28:07,578 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-04 03:28:07,585 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 03:28:07,585 INFO L124 PetriNetUnfolderBase]: 8/85 cut-off events. [2023-08-04 03:28:07,585 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2023-08-04 03:28:07,585 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:28:07,586 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2023-08-04 03:28:07,586 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 03:28:07,586 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:28:07,587 INFO L85 PathProgramCache]: Analyzing trace with hash -1495709964, now seen corresponding path program 1 times [2023-08-04 03:28:07,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:28:07,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988471670] [2023-08-04 03:28:07,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:28:07,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:28:07,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:28:07,771 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 03:28:07,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:28:07,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988471670] [2023-08-04 03:28:07,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988471670] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:28:07,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828756088] [2023-08-04 03:28:07,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:28:07,772 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:28:07,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:28:07,777 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 03:28:07,790 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 03:28:07,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:28:07,901 INFO L262 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 03:28:07,904 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:28:07,969 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 03:28:07,970 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 03:28:07,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [828756088] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:28:07,970 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 03:28:07,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-04 03:28:07,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614827187] [2023-08-04 03:28:07,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:28:07,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 03:28:07,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:28:08,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 03:28:08,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 03:28:08,026 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 421 [2023-08-04 03:28:08,033 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 60 transitions, 168 flow. Second operand has 5 states, 5 states have (on average 187.0) internal successors, (935), 5 states have internal predecessors, (935), 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 03:28:08,033 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:28:08,033 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 421 [2023-08-04 03:28:08,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:28:10,213 INFO L124 PetriNetUnfolderBase]: 17016/24276 cut-off events. [2023-08-04 03:28:10,213 INFO L125 PetriNetUnfolderBase]: For 2156/2156 co-relation queries the response was YES. [2023-08-04 03:28:10,275 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47987 conditions, 24276 events. 17016/24276 cut-off events. For 2156/2156 co-relation queries the response was YES. Maximal size of possible extension queue 973. Compared 150504 event pairs, 5884 based on Foata normal form. 0/22491 useless extension candidates. Maximal degree in co-relation 12339. Up to 22166 conditions per place. [2023-08-04 03:28:10,331 INFO L140 encePairwiseOnDemand]: 416/421 looper letters, 41 selfloop transitions, 5 changer transitions 17/74 dead transitions. [2023-08-04 03:28:10,331 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 74 transitions, 314 flow [2023-08-04 03:28:10,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 03:28:10,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 03:28:10,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 988 transitions. [2023-08-04 03:28:10,347 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4693586698337292 [2023-08-04 03:28:10,348 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 988 transitions. [2023-08-04 03:28:10,348 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 988 transitions. [2023-08-04 03:28:10,351 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:28:10,353 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 988 transitions. [2023-08-04 03:28:10,359 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 197.6) internal successors, (988), 5 states have internal predecessors, (988), 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 03:28:10,365 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 421.0) internal successors, (2526), 6 states have internal predecessors, (2526), 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 03:28:10,367 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 421.0) internal successors, (2526), 6 states have internal predecessors, (2526), 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 03:28:10,368 INFO L175 Difference]: Start difference. First operand has 55 places, 60 transitions, 168 flow. Second operand 5 states and 988 transitions. [2023-08-04 03:28:10,369 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 74 transitions, 314 flow [2023-08-04 03:28:10,375 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 74 transitions, 308 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 03:28:10,377 INFO L231 Difference]: Finished difference. Result has 56 places, 44 transitions, 123 flow [2023-08-04 03:28:10,379 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=421, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=123, PETRI_PLACES=56, PETRI_TRANSITIONS=44} [2023-08-04 03:28:10,381 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 1 predicate places. [2023-08-04 03:28:10,382 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 44 transitions, 123 flow [2023-08-04 03:28:10,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 187.0) internal successors, (935), 5 states have internal predecessors, (935), 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 03:28:10,383 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:28:10,383 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:28:10,389 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 03:28:10,588 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 03:28:10,589 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 03:28:10,589 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:28:10,589 INFO L85 PathProgramCache]: Analyzing trace with hash 993571824, now seen corresponding path program 1 times [2023-08-04 03:28:10,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:28:10,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422182934] [2023-08-04 03:28:10,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:28:10,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:28:10,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:28:10,705 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 03:28:10,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:28:10,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422182934] [2023-08-04 03:28:10,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422182934] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:28:10,706 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 03:28:10,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 03:28:10,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642312927] [2023-08-04 03:28:10,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:28:10,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 03:28:10,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:28:10,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 03:28:10,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 03:28:10,718 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 186 out of 421 [2023-08-04 03:28:10,719 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 44 transitions, 123 flow. Second operand has 3 states, 3 states have (on average 188.66666666666666) internal successors, (566), 3 states have internal predecessors, (566), 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 03:28:10,719 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:28:10,719 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 186 of 421 [2023-08-04 03:28:10,719 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:28:11,243 INFO L124 PetriNetUnfolderBase]: 4155/6070 cut-off events. [2023-08-04 03:28:11,244 INFO L125 PetriNetUnfolderBase]: For 316/316 co-relation queries the response was YES. [2023-08-04 03:28:11,257 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12016 conditions, 6070 events. 4155/6070 cut-off events. For 316/316 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 31877 event pairs, 2076 based on Foata normal form. 1/6034 useless extension candidates. Maximal degree in co-relation 3008. Up to 5437 conditions per place. [2023-08-04 03:28:11,286 INFO L140 encePairwiseOnDemand]: 418/421 looper letters, 35 selfloop transitions, 2 changer transitions 0/48 dead transitions. [2023-08-04 03:28:11,286 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 48 transitions, 204 flow [2023-08-04 03:28:11,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 03:28:11,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 03:28:11,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 595 transitions. [2023-08-04 03:28:11,288 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47110055423594616 [2023-08-04 03:28:11,288 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 595 transitions. [2023-08-04 03:28:11,289 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 595 transitions. [2023-08-04 03:28:11,289 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:28:11,289 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 595 transitions. [2023-08-04 03:28:11,290 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 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 03:28:11,292 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 421.0) internal successors, (1684), 4 states have internal predecessors, (1684), 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 03:28:11,293 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 421.0) internal successors, (1684), 4 states have internal predecessors, (1684), 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 03:28:11,293 INFO L175 Difference]: Start difference. First operand has 56 places, 44 transitions, 123 flow. Second operand 3 states and 595 transitions. [2023-08-04 03:28:11,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 48 transitions, 204 flow [2023-08-04 03:28:11,298 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 48 transitions, 201 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-04 03:28:11,299 INFO L231 Difference]: Finished difference. Result has 48 places, 43 transitions, 119 flow [2023-08-04 03:28:11,299 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=421, PETRI_DIFFERENCE_MINUEND_FLOW=115, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=119, PETRI_PLACES=48, PETRI_TRANSITIONS=43} [2023-08-04 03:28:11,300 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -7 predicate places. [2023-08-04 03:28:11,300 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 43 transitions, 119 flow [2023-08-04 03:28:11,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 188.66666666666666) internal successors, (566), 3 states have internal predecessors, (566), 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 03:28:11,301 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:28:11,301 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:28:11,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-04 03:28:11,301 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 03:28:11,301 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:28:11,302 INFO L85 PathProgramCache]: Analyzing trace with hash 429994737, now seen corresponding path program 1 times [2023-08-04 03:28:11,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:28:11,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18675791] [2023-08-04 03:28:11,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:28:11,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:28:11,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:28:11,418 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 03:28:11,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:28:11,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18675791] [2023-08-04 03:28:11,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18675791] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:28:11,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751843952] [2023-08-04 03:28:11,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:28:11,419 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:28:11,419 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:28:11,421 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 03:28:11,423 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 03:28:11,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:28:11,513 INFO L262 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 03:28:11,514 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:28:11,530 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 03:28:11,531 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 03:28:11,549 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 03:28:11,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [751843952] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 03:28:11,550 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 03:28:11,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 03:28:11,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463193663] [2023-08-04 03:28:11,550 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 03:28:11,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 03:28:11,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:28:11,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 03:28:11,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 03:28:11,566 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 421 [2023-08-04 03:28:11,567 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 43 transitions, 119 flow. Second operand has 5 states, 5 states have (on average 188.0) internal successors, (940), 5 states have internal predecessors, (940), 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 03:28:11,568 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:28:11,568 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 421 [2023-08-04 03:28:11,568 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:28:11,974 INFO L124 PetriNetUnfolderBase]: 3535/5054 cut-off events. [2023-08-04 03:28:11,974 INFO L125 PetriNetUnfolderBase]: For 188/188 co-relation queries the response was YES. [2023-08-04 03:28:11,990 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9981 conditions, 5054 events. 3535/5054 cut-off events. For 188/188 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 24775 event pairs, 1056 based on Foata normal form. 4/5025 useless extension candidates. Maximal degree in co-relation 2999. Up to 4517 conditions per place. [2023-08-04 03:28:12,016 INFO L140 encePairwiseOnDemand]: 418/421 looper letters, 41 selfloop transitions, 3 changer transitions 0/55 dead transitions. [2023-08-04 03:28:12,016 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 55 transitions, 230 flow [2023-08-04 03:28:12,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 03:28:12,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 03:28:12,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 785 transitions. [2023-08-04 03:28:12,019 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4661520190023753 [2023-08-04 03:28:12,019 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 785 transitions. [2023-08-04 03:28:12,019 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 785 transitions. [2023-08-04 03:28:12,019 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:28:12,019 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 785 transitions. [2023-08-04 03:28:12,021 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 196.25) internal successors, (785), 4 states have internal predecessors, (785), 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 03:28:12,024 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 421.0) internal successors, (2105), 5 states have internal predecessors, (2105), 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 03:28:12,025 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 421.0) internal successors, (2105), 5 states have internal predecessors, (2105), 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 03:28:12,025 INFO L175 Difference]: Start difference. First operand has 48 places, 43 transitions, 119 flow. Second operand 4 states and 785 transitions. [2023-08-04 03:28:12,025 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 55 transitions, 230 flow [2023-08-04 03:28:12,026 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 55 transitions, 226 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 03:28:12,027 INFO L231 Difference]: Finished difference. Result has 49 places, 42 transitions, 116 flow [2023-08-04 03:28:12,027 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=421, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=116, PETRI_PLACES=49, PETRI_TRANSITIONS=42} [2023-08-04 03:28:12,027 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -6 predicate places. [2023-08-04 03:28:12,028 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 42 transitions, 116 flow [2023-08-04 03:28:12,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 188.0) internal successors, (940), 5 states have internal predecessors, (940), 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 03:28:12,028 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:28:12,029 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:28:12,037 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-08-04 03:28:12,234 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,SelfDestructingSolverStorable3 [2023-08-04 03:28:12,234 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 03:28:12,235 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:28:12,235 INFO L85 PathProgramCache]: Analyzing trace with hash 1671303953, now seen corresponding path program 1 times [2023-08-04 03:28:12,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:28:12,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033784577] [2023-08-04 03:28:12,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:28:12,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:28:12,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:28:12,364 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 03:28:12,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:28:12,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033784577] [2023-08-04 03:28:12,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033784577] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:28:12,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870657414] [2023-08-04 03:28:12,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:28:12,365 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:28:12,365 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:28:12,367 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 03:28:12,369 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 03:28:12,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:28:12,454 INFO L262 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 03:28:12,455 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:28:12,472 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 03:28:12,472 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 03:28:12,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1870657414] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:28:12,472 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 03:28:12,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-04 03:28:12,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684530711] [2023-08-04 03:28:12,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:28:12,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 03:28:12,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:28:12,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 03:28:12,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 03:28:12,485 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 421 [2023-08-04 03:28:12,486 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 42 transitions, 116 flow. Second operand has 5 states, 5 states have (on average 188.0) internal successors, (940), 5 states have internal predecessors, (940), 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 03:28:12,486 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:28:12,486 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 421 [2023-08-04 03:28:12,486 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:28:12,814 INFO L124 PetriNetUnfolderBase]: 2511/3556 cut-off events. [2023-08-04 03:28:12,814 INFO L125 PetriNetUnfolderBase]: For 190/190 co-relation queries the response was YES. [2023-08-04 03:28:12,820 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7155 conditions, 3556 events. 2511/3556 cut-off events. For 190/190 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 15962 event pairs, 42 based on Foata normal form. 256/3794 useless extension candidates. Maximal degree in co-relation 2149. Up to 1600 conditions per place. [2023-08-04 03:28:12,822 INFO L140 encePairwiseOnDemand]: 418/421 looper letters, 0 selfloop transitions, 0 changer transitions 79/79 dead transitions. [2023-08-04 03:28:12,822 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 79 transitions, 326 flow [2023-08-04 03:28:12,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 03:28:12,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 03:28:12,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 994 transitions. [2023-08-04 03:28:12,825 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47220902612826604 [2023-08-04 03:28:12,826 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 994 transitions. [2023-08-04 03:28:12,826 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 994 transitions. [2023-08-04 03:28:12,826 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:28:12,826 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 994 transitions. [2023-08-04 03:28:12,828 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 198.8) internal successors, (994), 5 states have internal predecessors, (994), 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 03:28:12,832 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 421.0) internal successors, (2526), 6 states have internal predecessors, (2526), 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 03:28:12,833 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 421.0) internal successors, (2526), 6 states have internal predecessors, (2526), 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 03:28:12,833 INFO L175 Difference]: Start difference. First operand has 49 places, 42 transitions, 116 flow. Second operand 5 states and 994 transitions. [2023-08-04 03:28:12,833 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 79 transitions, 326 flow [2023-08-04 03:28:12,837 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 79 transitions, 319 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-04 03:28:12,838 INFO L231 Difference]: Finished difference. Result has 48 places, 0 transitions, 0 flow [2023-08-04 03:28:12,838 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=421, PETRI_DIFFERENCE_MINUEND_FLOW=105, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=0, PETRI_PLACES=48, PETRI_TRANSITIONS=0} [2023-08-04 03:28:12,839 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -7 predicate places. [2023-08-04 03:28:12,840 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 0 transitions, 0 flow [2023-08-04 03:28:12,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 188.0) internal successors, (940), 5 states have internal predecessors, (940), 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 03:28:12,840 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-04 03:28:12,841 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-04 03:28:12,847 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-04 03:28:13,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:28:13,048 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-08-04 03:28:13,049 INFO L307 ceAbstractionStarter]: Result for error location InUseError was SAFE,SAFE (1/2) [2023-08-04 03:28:13,053 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 206 places, 226 transitions, 500 flow [2023-08-04 03:28:13,132 INFO L124 PetriNetUnfolderBase]: 141/915 cut-off events. [2023-08-04 03:28:13,133 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2023-08-04 03:28:13,137 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1012 conditions, 915 events. 141/915 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 4245 event pairs, 2 based on Foata normal form. 0/771 useless extension candidates. Maximal degree in co-relation 573. Up to 32 conditions per place. [2023-08-04 03:28:13,137 INFO L82 GeneralOperation]: Start removeDead. Operand has 206 places, 226 transitions, 500 flow [2023-08-04 03:28:13,140 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 206 places, 226 transitions, 500 flow [2023-08-04 03:28:13,140 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 03:28:13,141 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 206 places, 226 transitions, 500 flow [2023-08-04 03:28:13,141 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 206 places, 226 transitions, 500 flow [2023-08-04 03:28:13,141 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 206 places, 226 transitions, 500 flow [2023-08-04 03:28:13,215 INFO L124 PetriNetUnfolderBase]: 141/915 cut-off events. [2023-08-04 03:28:13,215 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2023-08-04 03:28:13,221 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1012 conditions, 915 events. 141/915 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 4245 event pairs, 2 based on Foata normal form. 0/771 useless extension candidates. Maximal degree in co-relation 573. Up to 32 conditions per place. [2023-08-04 03:28:13,236 INFO L119 LiptonReduction]: Number of co-enabled transitions 6000 [2023-08-04 03:28:18,279 INFO L134 LiptonReduction]: Checked pairs total: 25206 [2023-08-04 03:28:18,280 INFO L136 LiptonReduction]: Total number of compositions: 197 [2023-08-04 03:28:18,282 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 03:28:18,283 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;@5ed13567, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 03:28:18,283 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 03:28:18,285 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 03:28:18,285 INFO L124 PetriNetUnfolderBase]: 2/17 cut-off events. [2023-08-04 03:28:18,285 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 03:28:18,285 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:28:18,285 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:28:18,286 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 03:28:18,286 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:28:18,286 INFO L85 PathProgramCache]: Analyzing trace with hash 1470720321, now seen corresponding path program 1 times [2023-08-04 03:28:18,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:28:18,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924338263] [2023-08-04 03:28:18,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:28:18,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:28:18,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:28:18,322 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 03:28:18,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:28:18,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924338263] [2023-08-04 03:28:18,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924338263] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:28:18,323 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 03:28:18,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 03:28:18,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420989667] [2023-08-04 03:28:18,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:28:18,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 03:28:18,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:28:18,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 03:28:18,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 03:28:18,332 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 186 out of 423 [2023-08-04 03:28:18,333 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 60 transitions, 168 flow. Second operand has 3 states, 3 states have (on average 188.33333333333334) internal successors, (565), 3 states have internal predecessors, (565), 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 03:28:18,333 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:28:18,333 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 186 of 423 [2023-08-04 03:28:18,333 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:28:19,771 INFO L124 PetriNetUnfolderBase]: 16934/24170 cut-off events. [2023-08-04 03:28:19,772 INFO L125 PetriNetUnfolderBase]: For 2244/2244 co-relation queries the response was YES. [2023-08-04 03:28:19,807 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47739 conditions, 24170 events. 16934/24170 cut-off events. For 2244/2244 co-relation queries the response was YES. Maximal size of possible extension queue 948. Compared 147794 event pairs, 8831 based on Foata normal form. 0/22435 useless extension candidates. Maximal degree in co-relation 12364. Up to 22095 conditions per place. [2023-08-04 03:28:19,922 INFO L140 encePairwiseOnDemand]: 419/423 looper letters, 49 selfloop transitions, 2 changer transitions 2/65 dead transitions. [2023-08-04 03:28:19,923 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 65 transitions, 280 flow [2023-08-04 03:28:19,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 03:28:19,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 03:28:19,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 611 transitions. [2023-08-04 03:28:19,925 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48148148148148145 [2023-08-04 03:28:19,925 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 611 transitions. [2023-08-04 03:28:19,925 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 611 transitions. [2023-08-04 03:28:19,925 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:28:19,926 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 611 transitions. [2023-08-04 03:28:19,927 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 203.66666666666666) internal successors, (611), 3 states have internal predecessors, (611), 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 03:28:19,929 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 423.0) internal successors, (1692), 4 states have internal predecessors, (1692), 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 03:28:19,930 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 423.0) internal successors, (1692), 4 states have internal predecessors, (1692), 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 03:28:19,930 INFO L175 Difference]: Start difference. First operand has 55 places, 60 transitions, 168 flow. Second operand 3 states and 611 transitions. [2023-08-04 03:28:19,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 65 transitions, 280 flow [2023-08-04 03:28:19,932 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 65 transitions, 280 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 03:28:19,933 INFO L231 Difference]: Finished difference. Result has 57 places, 58 transitions, 166 flow [2023-08-04 03:28:19,934 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=166, PETRI_PLACES=57, PETRI_TRANSITIONS=58} [2023-08-04 03:28:19,934 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 2 predicate places. [2023-08-04 03:28:19,935 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 58 transitions, 166 flow [2023-08-04 03:28:19,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 188.33333333333334) internal successors, (565), 3 states have internal predecessors, (565), 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 03:28:19,935 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:28:19,935 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:28:19,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-04 03:28:19,935 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 03:28:19,936 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:28:19,936 INFO L85 PathProgramCache]: Analyzing trace with hash -1278781572, now seen corresponding path program 1 times [2023-08-04 03:28:19,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:28:19,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936650139] [2023-08-04 03:28:19,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:28:19,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:28:19,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:28:19,975 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 03:28:19,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:28:19,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936650139] [2023-08-04 03:28:19,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936650139] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:28:19,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190913552] [2023-08-04 03:28:19,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:28:19,975 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:28:19,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:28:19,977 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 03:28:20,005 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 03:28:20,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:28:20,059 INFO L262 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 03:28:20,059 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:28:20,072 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 03:28:20,072 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 03:28:20,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1190913552] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:28:20,073 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 03:28:20,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 03:28:20,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570748371] [2023-08-04 03:28:20,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:28:20,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 03:28:20,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:28:20,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 03:28:20,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 03:28:20,087 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 186 out of 423 [2023-08-04 03:28:20,088 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 58 transitions, 166 flow. Second operand has 3 states, 3 states have (on average 189.33333333333334) internal successors, (568), 3 states have internal predecessors, (568), 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 03:28:20,088 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:28:20,088 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 186 of 423 [2023-08-04 03:28:20,088 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:28:21,574 INFO L124 PetriNetUnfolderBase]: 16914/23904 cut-off events. [2023-08-04 03:28:21,575 INFO L125 PetriNetUnfolderBase]: For 1950/1950 co-relation queries the response was YES. [2023-08-04 03:28:21,625 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47332 conditions, 23904 events. 16914/23904 cut-off events. For 1950/1950 co-relation queries the response was YES. Maximal size of possible extension queue 941. Compared 142778 event pairs, 8806 based on Foata normal form. 0/22187 useless extension candidates. Maximal degree in co-relation 47281. Up to 21726 conditions per place. [2023-08-04 03:28:21,842 INFO L140 encePairwiseOnDemand]: 420/423 looper letters, 58 selfloop transitions, 2 changer transitions 0/72 dead transitions. [2023-08-04 03:28:21,843 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 72 transitions, 314 flow [2023-08-04 03:28:21,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 03:28:21,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 03:28:21,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 618 transitions. [2023-08-04 03:28:21,845 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48699763593380613 [2023-08-04 03:28:21,845 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 618 transitions. [2023-08-04 03:28:21,846 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 618 transitions. [2023-08-04 03:28:21,846 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:28:21,846 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 618 transitions. [2023-08-04 03:28:21,849 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 206.0) internal successors, (618), 3 states have internal predecessors, (618), 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 03:28:21,851 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 423.0) internal successors, (1692), 4 states have internal predecessors, (1692), 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 03:28:21,851 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 423.0) internal successors, (1692), 4 states have internal predecessors, (1692), 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 03:28:21,851 INFO L175 Difference]: Start difference. First operand has 57 places, 58 transitions, 166 flow. Second operand 3 states and 618 transitions. [2023-08-04 03:28:21,851 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 72 transitions, 314 flow [2023-08-04 03:28:21,858 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 72 transitions, 306 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-04 03:28:21,859 INFO L231 Difference]: Finished difference. Result has 55 places, 59 transitions, 170 flow [2023-08-04 03:28:21,859 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=170, PETRI_PLACES=55, PETRI_TRANSITIONS=59} [2023-08-04 03:28:21,861 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 0 predicate places. [2023-08-04 03:28:21,861 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 59 transitions, 170 flow [2023-08-04 03:28:21,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 189.33333333333334) internal successors, (568), 3 states have internal predecessors, (568), 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 03:28:21,861 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:28:21,862 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:28:21,870 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 03:28:22,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:28:22,068 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 03:28:22,068 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:28:22,068 INFO L85 PathProgramCache]: Analyzing trace with hash 1829836656, now seen corresponding path program 1 times [2023-08-04 03:28:22,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:28:22,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963683123] [2023-08-04 03:28:22,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:28:22,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:28:22,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:28:22,122 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 03:28:22,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:28:22,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963683123] [2023-08-04 03:28:22,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963683123] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:28:22,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557537869] [2023-08-04 03:28:22,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:28:22,123 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:28:22,123 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:28:22,124 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 03:28:22,127 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 03:28:22,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:28:22,199 INFO L262 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 03:28:22,199 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:28:22,209 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 03:28:22,209 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 03:28:22,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1557537869] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:28:22,209 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 03:28:22,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 03:28:22,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446823389] [2023-08-04 03:28:22,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:28:22,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 03:28:22,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:28:22,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 03:28:22,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 03:28:22,220 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 186 out of 423 [2023-08-04 03:28:22,220 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 59 transitions, 170 flow. Second operand has 3 states, 3 states have (on average 190.33333333333334) internal successors, (571), 3 states have internal predecessors, (571), 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 03:28:22,220 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:28:22,220 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 186 of 423 [2023-08-04 03:28:22,220 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:28:23,399 INFO L124 PetriNetUnfolderBase]: 13778/19469 cut-off events. [2023-08-04 03:28:23,399 INFO L125 PetriNetUnfolderBase]: For 1445/1445 co-relation queries the response was YES. [2023-08-04 03:28:23,449 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39774 conditions, 19469 events. 13778/19469 cut-off events. For 1445/1445 co-relation queries the response was YES. Maximal size of possible extension queue 645. Compared 113644 event pairs, 7032 based on Foata normal form. 0/18696 useless extension candidates. Maximal degree in co-relation 11410. Up to 13322 conditions per place. [2023-08-04 03:28:23,530 INFO L140 encePairwiseOnDemand]: 420/423 looper letters, 67 selfloop transitions, 2 changer transitions 0/81 dead transitions. [2023-08-04 03:28:23,531 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 81 transitions, 362 flow [2023-08-04 03:28:23,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 03:28:23,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 03:28:23,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 626 transitions. [2023-08-04 03:28:23,534 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4933018124507486 [2023-08-04 03:28:23,535 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 626 transitions. [2023-08-04 03:28:23,536 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 626 transitions. [2023-08-04 03:28:23,536 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:28:23,536 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 626 transitions. [2023-08-04 03:28:23,537 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 03:28:23,540 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 423.0) internal successors, (1692), 4 states have internal predecessors, (1692), 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 03:28:23,540 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 423.0) internal successors, (1692), 4 states have internal predecessors, (1692), 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 03:28:23,540 INFO L175 Difference]: Start difference. First operand has 55 places, 59 transitions, 170 flow. Second operand 3 states and 626 transitions. [2023-08-04 03:28:23,540 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 81 transitions, 362 flow [2023-08-04 03:28:23,543 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 81 transitions, 360 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 03:28:23,546 INFO L231 Difference]: Finished difference. Result has 57 places, 60 transitions, 180 flow [2023-08-04 03:28:23,546 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=180, PETRI_PLACES=57, PETRI_TRANSITIONS=60} [2023-08-04 03:28:23,547 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 2 predicate places. [2023-08-04 03:28:23,547 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 60 transitions, 180 flow [2023-08-04 03:28:23,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 190.33333333333334) internal successors, (571), 3 states have internal predecessors, (571), 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 03:28:23,548 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:28:23,548 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] [2023-08-04 03:28:23,553 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 03:28:23,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:28:23,753 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 03:28:23,753 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:28:23,753 INFO L85 PathProgramCache]: Analyzing trace with hash 1361139453, now seen corresponding path program 1 times [2023-08-04 03:28:23,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:28:23,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517220795] [2023-08-04 03:28:23,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:28:23,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:28:23,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:28:23,816 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 03:28:23,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:28:23,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517220795] [2023-08-04 03:28:23,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517220795] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:28:23,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867175820] [2023-08-04 03:28:23,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:28:23,820 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:28:23,820 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:28:23,822 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 03:28:23,825 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 03:28:23,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:28:23,913 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 03:28:23,915 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:28:23,921 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 03:28:23,921 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 03:28:23,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1867175820] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:28:23,922 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 03:28:23,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-08-04 03:28:23,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775755808] [2023-08-04 03:28:23,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:28:23,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 03:28:23,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:28:23,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 03:28:23,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 03:28:23,931 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 186 out of 423 [2023-08-04 03:28:23,932 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 60 transitions, 180 flow. Second operand has 3 states, 3 states have (on average 191.66666666666666) internal successors, (575), 3 states have internal predecessors, (575), 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 03:28:23,932 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:28:23,932 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 186 of 423 [2023-08-04 03:28:23,932 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:28:25,153 INFO L124 PetriNetUnfolderBase]: 13381/19250 cut-off events. [2023-08-04 03:28:25,153 INFO L125 PetriNetUnfolderBase]: For 3826/3826 co-relation queries the response was YES. [2023-08-04 03:28:25,198 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40688 conditions, 19250 events. 13381/19250 cut-off events. For 3826/3826 co-relation queries the response was YES. Maximal size of possible extension queue 641. Compared 114180 event pairs, 8135 based on Foata normal form. 0/19082 useless extension candidates. Maximal degree in co-relation 12199. Up to 14746 conditions per place. [2023-08-04 03:28:25,274 INFO L140 encePairwiseOnDemand]: 420/423 looper letters, 68 selfloop transitions, 2 changer transitions 0/82 dead transitions. [2023-08-04 03:28:25,275 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 82 transitions, 374 flow [2023-08-04 03:28:25,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 03:28:25,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 03:28:25,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 626 transitions. [2023-08-04 03:28:25,277 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4933018124507486 [2023-08-04 03:28:25,277 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 626 transitions. [2023-08-04 03:28:25,277 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 626 transitions. [2023-08-04 03:28:25,278 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:28:25,278 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 626 transitions. [2023-08-04 03:28:25,279 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 03:28:25,281 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 423.0) internal successors, (1692), 4 states have internal predecessors, (1692), 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 03:28:25,281 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 423.0) internal successors, (1692), 4 states have internal predecessors, (1692), 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 03:28:25,281 INFO L175 Difference]: Start difference. First operand has 57 places, 60 transitions, 180 flow. Second operand 3 states and 626 transitions. [2023-08-04 03:28:25,282 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 82 transitions, 374 flow [2023-08-04 03:28:25,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 82 transitions, 372 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 03:28:25,315 INFO L231 Difference]: Finished difference. Result has 59 places, 61 transitions, 190 flow [2023-08-04 03:28:25,315 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=190, PETRI_PLACES=59, PETRI_TRANSITIONS=61} [2023-08-04 03:28:25,316 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 4 predicate places. [2023-08-04 03:28:25,316 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 61 transitions, 190 flow [2023-08-04 03:28:25,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 191.66666666666666) internal successors, (575), 3 states have internal predecessors, (575), 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 03:28:25,316 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:28:25,317 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:28:25,325 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 03:28:25,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:28:25,522 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 03:28:25,522 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:28:25,522 INFO L85 PathProgramCache]: Analyzing trace with hash -1138512057, now seen corresponding path program 1 times [2023-08-04 03:28:25,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:28:25,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134875908] [2023-08-04 03:28:25,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:28:25,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:28:25,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:28:25,589 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 03:28:25,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:28:25,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134875908] [2023-08-04 03:28:25,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134875908] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:28:25,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482185676] [2023-08-04 03:28:25,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:28:25,590 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:28:25,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:28:25,592 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 03:28:25,594 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 03:28:25,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:28:25,689 INFO L262 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 03:28:25,692 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:28:25,709 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 03:28:25,709 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 03:28:25,724 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 03:28:25,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [482185676] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 03:28:25,724 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 03:28:25,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 03:28:25,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117725114] [2023-08-04 03:28:25,725 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 03:28:25,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 03:28:25,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:28:25,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 03:28:25,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 03:28:25,741 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 423 [2023-08-04 03:28:25,744 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 61 transitions, 190 flow. Second operand has 5 states, 5 states have (on average 190.0) internal successors, (950), 5 states have internal predecessors, (950), 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 03:28:25,745 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:28:25,745 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 423 [2023-08-04 03:28:25,745 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:28:26,732 INFO L124 PetriNetUnfolderBase]: 12185/17423 cut-off events. [2023-08-04 03:28:26,733 INFO L125 PetriNetUnfolderBase]: For 3290/3290 co-relation queries the response was YES. [2023-08-04 03:28:26,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37215 conditions, 17423 events. 12185/17423 cut-off events. For 3290/3290 co-relation queries the response was YES. Maximal size of possible extension queue 613. Compared 100775 event pairs, 4239 based on Foata normal form. 4/17378 useless extension candidates. Maximal degree in co-relation 27304. Up to 16137 conditions per place. [2023-08-04 03:28:26,832 INFO L140 encePairwiseOnDemand]: 419/423 looper letters, 59 selfloop transitions, 3 changer transitions 1/75 dead transitions. [2023-08-04 03:28:26,832 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 75 transitions, 344 flow [2023-08-04 03:28:26,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 03:28:26,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 03:28:26,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 801 transitions. [2023-08-04 03:28:26,835 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4734042553191489 [2023-08-04 03:28:26,836 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 801 transitions. [2023-08-04 03:28:26,836 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 801 transitions. [2023-08-04 03:28:26,836 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:28:26,837 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 801 transitions. [2023-08-04 03:28:26,838 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 200.25) internal successors, (801), 4 states have internal predecessors, (801), 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 03:28:26,841 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 423.0) internal successors, (2115), 5 states have internal predecessors, (2115), 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 03:28:26,841 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 423.0) internal successors, (2115), 5 states have internal predecessors, (2115), 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 03:28:26,841 INFO L175 Difference]: Start difference. First operand has 59 places, 61 transitions, 190 flow. Second operand 4 states and 801 transitions. [2023-08-04 03:28:26,841 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 75 transitions, 344 flow [2023-08-04 03:28:26,900 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 75 transitions, 342 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 03:28:26,901 INFO L231 Difference]: Finished difference. Result has 63 places, 61 transitions, 202 flow [2023-08-04 03:28:26,901 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=202, PETRI_PLACES=63, PETRI_TRANSITIONS=61} [2023-08-04 03:28:26,902 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 8 predicate places. [2023-08-04 03:28:26,902 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 61 transitions, 202 flow [2023-08-04 03:28:26,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 190.0) internal successors, (950), 5 states have internal predecessors, (950), 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 03:28:26,902 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:28:26,902 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 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 03:28:26,907 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 03:28:27,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:28:27,104 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 03:28:27,105 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:28:27,105 INFO L85 PathProgramCache]: Analyzing trace with hash -1068978026, now seen corresponding path program 1 times [2023-08-04 03:28:27,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:28:27,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525164846] [2023-08-04 03:28:27,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:28:27,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:28:27,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:28:27,160 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 03:28:27,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:28:27,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525164846] [2023-08-04 03:28:27,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525164846] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:28:27,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839627729] [2023-08-04 03:28:27,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:28:27,161 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:28:27,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:28:27,163 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 03:28:27,166 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 03:28:27,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:28:27,254 INFO L262 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 03:28:27,256 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:28:27,269 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 03:28:27,269 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 03:28:27,284 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 03:28:27,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [839627729] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 03:28:27,284 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 03:28:27,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 03:28:27,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908295066] [2023-08-04 03:28:27,284 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 03:28:27,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 03:28:27,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:28:27,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 03:28:27,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 03:28:27,298 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 423 [2023-08-04 03:28:27,299 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 61 transitions, 202 flow. Second operand has 5 states, 5 states have (on average 190.2) internal successors, (951), 5 states have internal predecessors, (951), 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 03:28:27,299 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:28:27,299 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 423 [2023-08-04 03:28:27,299 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:28:28,361 INFO L124 PetriNetUnfolderBase]: 11625/16379 cut-off events. [2023-08-04 03:28:28,361 INFO L125 PetriNetUnfolderBase]: For 1679/1679 co-relation queries the response was YES. [2023-08-04 03:28:28,386 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35142 conditions, 16379 events. 11625/16379 cut-off events. For 1679/1679 co-relation queries the response was YES. Maximal size of possible extension queue 541. Compared 91340 event pairs, 3682 based on Foata normal form. 64/16425 useless extension candidates. Maximal degree in co-relation 25343. Up to 12308 conditions per place. [2023-08-04 03:28:28,427 INFO L140 encePairwiseOnDemand]: 419/423 looper letters, 75 selfloop transitions, 3 changer transitions 1/91 dead transitions. [2023-08-04 03:28:28,427 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 91 transitions, 420 flow [2023-08-04 03:28:28,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 03:28:28,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 03:28:28,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 817 transitions. [2023-08-04 03:28:28,429 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48286052009456265 [2023-08-04 03:28:28,429 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 817 transitions. [2023-08-04 03:28:28,429 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 817 transitions. [2023-08-04 03:28:28,429 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:28:28,429 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 817 transitions. [2023-08-04 03:28:28,431 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 204.25) internal successors, (817), 4 states have internal predecessors, (817), 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 03:28:28,433 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 423.0) internal successors, (2115), 5 states have internal predecessors, (2115), 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 03:28:28,434 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 423.0) internal successors, (2115), 5 states have internal predecessors, (2115), 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 03:28:28,434 INFO L175 Difference]: Start difference. First operand has 63 places, 61 transitions, 202 flow. Second operand 4 states and 817 transitions. [2023-08-04 03:28:28,434 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 91 transitions, 420 flow [2023-08-04 03:28:28,483 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 91 transitions, 411 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-04 03:28:28,484 INFO L231 Difference]: Finished difference. Result has 65 places, 61 transitions, 207 flow [2023-08-04 03:28:28,484 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=193, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=207, PETRI_PLACES=65, PETRI_TRANSITIONS=61} [2023-08-04 03:28:28,485 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 10 predicate places. [2023-08-04 03:28:28,485 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 61 transitions, 207 flow [2023-08-04 03:28:28,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 190.2) internal successors, (951), 5 states have internal predecessors, (951), 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 03:28:28,485 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:28:28,485 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:28:28,493 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-08-04 03:28:28,690 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,SelfDestructingSolverStorable10 [2023-08-04 03:28:28,690 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 03:28:28,691 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:28:28,691 INFO L85 PathProgramCache]: Analyzing trace with hash -1884488353, now seen corresponding path program 1 times [2023-08-04 03:28:28,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:28:28,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532063672] [2023-08-04 03:28:28,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:28:28,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:28:28,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:28:28,753 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-04 03:28:28,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:28:28,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532063672] [2023-08-04 03:28:28,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532063672] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:28:28,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082543749] [2023-08-04 03:28:28,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:28:28,754 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:28:28,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:28:28,756 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 03:28:28,780 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 03:28:28,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:28:28,859 INFO L262 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 03:28:28,865 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:28:28,877 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-04 03:28:28,877 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 03:28:28,894 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-04 03:28:28,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2082543749] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 03:28:28,894 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 03:28:28,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 03:28:28,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615085765] [2023-08-04 03:28:28,894 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 03:28:28,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 03:28:28,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:28:28,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 03:28:28,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 03:28:28,907 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 423 [2023-08-04 03:28:28,908 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 61 transitions, 207 flow. Second operand has 5 states, 5 states have (on average 190.4) internal successors, (952), 5 states have internal predecessors, (952), 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 03:28:28,908 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:28:28,908 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 423 [2023-08-04 03:28:28,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:28:29,613 INFO L124 PetriNetUnfolderBase]: 8137/11595 cut-off events. [2023-08-04 03:28:29,614 INFO L125 PetriNetUnfolderBase]: For 4135/4135 co-relation queries the response was YES. [2023-08-04 03:28:29,658 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25514 conditions, 11595 events. 8137/11595 cut-off events. For 4135/4135 co-relation queries the response was YES. Maximal size of possible extension queue 422. Compared 62093 event pairs, 2353 based on Foata normal form. 256/11813 useless extension candidates. Maximal degree in co-relation 23553. Up to 4431 conditions per place. [2023-08-04 03:28:29,696 INFO L140 encePairwiseOnDemand]: 419/423 looper letters, 83 selfloop transitions, 4 changer transitions 0/99 dead transitions. [2023-08-04 03:28:29,697 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 99 transitions, 466 flow [2023-08-04 03:28:29,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 03:28:29,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 03:28:29,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 825 transitions. [2023-08-04 03:28:29,699 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4875886524822695 [2023-08-04 03:28:29,699 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 825 transitions. [2023-08-04 03:28:29,699 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 825 transitions. [2023-08-04 03:28:29,700 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:28:29,700 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 825 transitions. [2023-08-04 03:28:29,701 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 206.25) internal successors, (825), 4 states have internal predecessors, (825), 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 03:28:29,704 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 423.0) internal successors, (2115), 5 states have internal predecessors, (2115), 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 03:28:29,704 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 423.0) internal successors, (2115), 5 states have internal predecessors, (2115), 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 03:28:29,705 INFO L175 Difference]: Start difference. First operand has 65 places, 61 transitions, 207 flow. Second operand 4 states and 825 transitions. [2023-08-04 03:28:29,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 99 transitions, 466 flow [2023-08-04 03:28:29,729 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 99 transitions, 456 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-04 03:28:29,730 INFO L231 Difference]: Finished difference. Result has 67 places, 62 transitions, 218 flow [2023-08-04 03:28:29,730 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=218, PETRI_PLACES=67, PETRI_TRANSITIONS=62} [2023-08-04 03:28:29,731 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 12 predicate places. [2023-08-04 03:28:29,731 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 62 transitions, 218 flow [2023-08-04 03:28:29,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 190.4) internal successors, (952), 5 states have internal predecessors, (952), 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 03:28:29,731 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:28:29,731 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:28:29,736 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-04 03:28:29,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:28:29,936 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 03:28:29,936 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:28:29,937 INFO L85 PathProgramCache]: Analyzing trace with hash -1535541985, now seen corresponding path program 1 times [2023-08-04 03:28:29,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:28:29,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107173634] [2023-08-04 03:28:29,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:28:29,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:28:29,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:28:29,998 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-04 03:28:29,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:28:29,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107173634] [2023-08-04 03:28:29,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107173634] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:28:29,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083483887] [2023-08-04 03:28:29,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:28:29,999 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:28:29,999 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:28:30,000 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 03:28:30,009 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 03:28:30,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:28:30,099 INFO L262 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 03:28:30,100 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:28:30,110 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-04 03:28:30,110 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 03:28:30,124 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-04 03:28:30,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1083483887] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 03:28:30,125 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 03:28:30,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 03:28:30,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731795759] [2023-08-04 03:28:30,125 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 03:28:30,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 03:28:30,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:28:30,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 03:28:30,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 03:28:30,136 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 423 [2023-08-04 03:28:30,138 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 62 transitions, 218 flow. Second operand has 5 states, 5 states have (on average 190.8) internal successors, (954), 5 states have internal predecessors, (954), 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 03:28:30,138 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:28:30,138 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 423 [2023-08-04 03:28:30,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:28:30,858 INFO L124 PetriNetUnfolderBase]: 8121/11616 cut-off events. [2023-08-04 03:28:30,858 INFO L125 PetriNetUnfolderBase]: For 5856/5856 co-relation queries the response was YES. [2023-08-04 03:28:30,883 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26666 conditions, 11616 events. 8121/11616 cut-off events. For 5856/5856 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 62545 event pairs, 5681 based on Foata normal form. 17/11531 useless extension candidates. Maximal degree in co-relation 24684. Up to 10024 conditions per place. [2023-08-04 03:28:30,915 INFO L140 encePairwiseOnDemand]: 419/423 looper letters, 83 selfloop transitions, 3 changer transitions 2/100 dead transitions. [2023-08-04 03:28:30,915 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 100 transitions, 478 flow [2023-08-04 03:28:30,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 03:28:30,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 03:28:30,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 825 transitions. [2023-08-04 03:28:30,918 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4875886524822695 [2023-08-04 03:28:30,918 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 825 transitions. [2023-08-04 03:28:30,918 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 825 transitions. [2023-08-04 03:28:30,918 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:28:30,918 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 825 transitions. [2023-08-04 03:28:30,920 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 206.25) internal successors, (825), 4 states have internal predecessors, (825), 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 03:28:30,923 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 423.0) internal successors, (2115), 5 states have internal predecessors, (2115), 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 03:28:30,923 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 423.0) internal successors, (2115), 5 states have internal predecessors, (2115), 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 03:28:30,923 INFO L175 Difference]: Start difference. First operand has 67 places, 62 transitions, 218 flow. Second operand 4 states and 825 transitions. [2023-08-04 03:28:30,923 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 100 transitions, 478 flow [2023-08-04 03:28:30,965 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 100 transitions, 474 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-04 03:28:30,967 INFO L231 Difference]: Finished difference. Result has 71 places, 61 transitions, 222 flow [2023-08-04 03:28:30,967 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=222, PETRI_PLACES=71, PETRI_TRANSITIONS=61} [2023-08-04 03:28:30,968 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 16 predicate places. [2023-08-04 03:28:30,968 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 61 transitions, 222 flow [2023-08-04 03:28:30,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 190.8) internal successors, (954), 5 states have internal predecessors, (954), 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 03:28:30,968 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:28:30,969 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:28:30,974 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-04 03:28:31,174 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,SelfDestructingSolverStorable12 [2023-08-04 03:28:31,174 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 03:28:31,174 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:28:31,174 INFO L85 PathProgramCache]: Analyzing trace with hash -39028760, now seen corresponding path program 1 times [2023-08-04 03:28:31,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:28:31,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429094954] [2023-08-04 03:28:31,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:28:31,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:28:31,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:28:31,433 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-08-04 03:28:31,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:28:31,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429094954] [2023-08-04 03:28:31,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429094954] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:28:31,433 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 03:28:31,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-04 03:28:31,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473164961] [2023-08-04 03:28:31,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:28:31,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 03:28:31,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:28:31,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 03:28:31,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 03:28:31,459 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 186 out of 423 [2023-08-04 03:28:31,460 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 61 transitions, 222 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 03:28:31,460 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:28:31,460 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 186 of 423 [2023-08-04 03:28:31,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:28:32,419 INFO L124 PetriNetUnfolderBase]: 10870/16452 cut-off events. [2023-08-04 03:28:32,419 INFO L125 PetriNetUnfolderBase]: For 9038/9038 co-relation queries the response was YES. [2023-08-04 03:28:32,469 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36342 conditions, 16452 events. 10870/16452 cut-off events. For 9038/9038 co-relation queries the response was YES. Maximal size of possible extension queue 658. Compared 108217 event pairs, 2086 based on Foata normal form. 1/16392 useless extension candidates. Maximal degree in co-relation 35974. Up to 11323 conditions per place. [2023-08-04 03:28:32,627 INFO L140 encePairwiseOnDemand]: 417/423 looper letters, 81 selfloop transitions, 5 changer transitions 1/99 dead transitions. [2023-08-04 03:28:32,627 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 99 transitions, 562 flow [2023-08-04 03:28:32,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 03:28:32,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 03:28:32,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 638 transitions. [2023-08-04 03:28:32,629 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5027580772261623 [2023-08-04 03:28:32,629 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 638 transitions. [2023-08-04 03:28:32,629 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 638 transitions. [2023-08-04 03:28:32,629 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:28:32,630 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 638 transitions. [2023-08-04 03:28:32,631 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 212.66666666666666) internal successors, (638), 3 states have internal predecessors, (638), 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 03:28:32,633 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 423.0) internal successors, (1692), 4 states have internal predecessors, (1692), 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 03:28:32,633 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 423.0) internal successors, (1692), 4 states have internal predecessors, (1692), 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 03:28:32,634 INFO L175 Difference]: Start difference. First operand has 71 places, 61 transitions, 222 flow. Second operand 3 states and 638 transitions. [2023-08-04 03:28:32,634 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 99 transitions, 562 flow [2023-08-04 03:28:32,673 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 99 transitions, 546 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-08-04 03:28:32,674 INFO L231 Difference]: Finished difference. Result has 71 places, 65 transitions, 247 flow [2023-08-04 03:28:32,675 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=247, PETRI_PLACES=71, PETRI_TRANSITIONS=65} [2023-08-04 03:28:32,676 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 16 predicate places. [2023-08-04 03:28:32,676 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 65 transitions, 247 flow [2023-08-04 03:28:32,688 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 03:28:32,688 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:28:32,689 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 03:28:32,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-04 03:28:32,689 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 03:28:32,689 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:28:32,689 INFO L85 PathProgramCache]: Analyzing trace with hash 1571195501, now seen corresponding path program 1 times [2023-08-04 03:28:32,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:28:32,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14734165] [2023-08-04 03:28:32,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:28:32,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:28:32,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:28:32,755 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-04 03:28:32,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:28:32,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14734165] [2023-08-04 03:28:32,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14734165] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:28:32,756 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 03:28:32,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 03:28:32,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259137699] [2023-08-04 03:28:32,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:28:32,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 03:28:32,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:28:32,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 03:28:32,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 03:28:32,775 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 423 [2023-08-04 03:28:32,776 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 65 transitions, 247 flow. Second operand has 3 states, 3 states have (on average 191.66666666666666) internal successors, (575), 3 states have internal predecessors, (575), 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 03:28:32,777 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:28:32,777 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 423 [2023-08-04 03:28:32,777 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:28:34,725 INFO L124 PetriNetUnfolderBase]: 21062/29241 cut-off events. [2023-08-04 03:28:34,726 INFO L125 PetriNetUnfolderBase]: For 17001/17001 co-relation queries the response was YES. [2023-08-04 03:28:34,854 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74293 conditions, 29241 events. 21062/29241 cut-off events. For 17001/17001 co-relation queries the response was YES. Maximal size of possible extension queue 987. Compared 177094 event pairs, 7362 based on Foata normal form. 0/27499 useless extension candidates. Maximal degree in co-relation 73822. Up to 16167 conditions per place. [2023-08-04 03:28:34,968 INFO L140 encePairwiseOnDemand]: 415/423 looper letters, 90 selfloop transitions, 8 changer transitions 0/108 dead transitions. [2023-08-04 03:28:34,969 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 108 transitions, 622 flow [2023-08-04 03:28:34,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 03:28:34,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 03:28:34,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 630 transitions. [2023-08-04 03:28:34,970 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49645390070921985 [2023-08-04 03:28:34,970 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 630 transitions. [2023-08-04 03:28:34,970 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 630 transitions. [2023-08-04 03:28:34,971 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:28:34,971 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 630 transitions. [2023-08-04 03:28:34,972 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 210.0) internal successors, (630), 3 states have internal predecessors, (630), 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 03:28:34,974 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 423.0) internal successors, (1692), 4 states have internal predecessors, (1692), 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 03:28:34,974 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 423.0) internal successors, (1692), 4 states have internal predecessors, (1692), 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 03:28:34,974 INFO L175 Difference]: Start difference. First operand has 71 places, 65 transitions, 247 flow. Second operand 3 states and 630 transitions. [2023-08-04 03:28:34,974 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 108 transitions, 622 flow [2023-08-04 03:28:35,118 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 108 transitions, 615 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 03:28:35,119 INFO L231 Difference]: Finished difference. Result has 74 places, 71 transitions, 306 flow [2023-08-04 03:28:35,120 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=242, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=306, PETRI_PLACES=74, PETRI_TRANSITIONS=71} [2023-08-04 03:28:35,120 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 19 predicate places. [2023-08-04 03:28:35,120 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 71 transitions, 306 flow [2023-08-04 03:28:35,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 191.66666666666666) internal successors, (575), 3 states have internal predecessors, (575), 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 03:28:35,120 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:28:35,121 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 03:28:35,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-04 03:28:35,121 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 03:28:35,121 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:28:35,121 INFO L85 PathProgramCache]: Analyzing trace with hash -819923863, now seen corresponding path program 1 times [2023-08-04 03:28:35,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:28:35,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595566861] [2023-08-04 03:28:35,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:28:35,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:28:35,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:28:35,282 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-04 03:28:35,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:28:35,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595566861] [2023-08-04 03:28:35,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595566861] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:28:35,283 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 03:28:35,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-04 03:28:35,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010280590] [2023-08-04 03:28:35,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:28:35,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 03:28:35,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:28:35,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 03:28:35,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-04 03:28:35,320 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 423 [2023-08-04 03:28:35,320 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 71 transitions, 306 flow. Second operand has 4 states, 4 states have (on average 187.75) internal successors, (751), 4 states have internal predecessors, (751), 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 03:28:35,320 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:28:35,321 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 423 [2023-08-04 03:28:35,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:28:36,976 INFO L124 PetriNetUnfolderBase]: 17746/25696 cut-off events. [2023-08-04 03:28:36,976 INFO L125 PetriNetUnfolderBase]: For 29505/29505 co-relation queries the response was YES. [2023-08-04 03:28:37,112 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72455 conditions, 25696 events. 17746/25696 cut-off events. For 29505/29505 co-relation queries the response was YES. Maximal size of possible extension queue 960. Compared 162578 event pairs, 12157 based on Foata normal form. 662/26093 useless extension candidates. Maximal degree in co-relation 71891. Up to 22208 conditions per place. [2023-08-04 03:28:37,208 INFO L140 encePairwiseOnDemand]: 416/423 looper letters, 56 selfloop transitions, 2 changer transitions 34/106 dead transitions. [2023-08-04 03:28:37,208 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 106 transitions, 652 flow [2023-08-04 03:28:37,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 03:28:37,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 03:28:37,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 800 transitions. [2023-08-04 03:28:37,211 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4728132387706856 [2023-08-04 03:28:37,211 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 800 transitions. [2023-08-04 03:28:37,211 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 800 transitions. [2023-08-04 03:28:37,211 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:28:37,211 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 800 transitions. [2023-08-04 03:28:37,213 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 200.0) internal successors, (800), 4 states have internal predecessors, (800), 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 03:28:37,214 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 423.0) internal successors, (2115), 5 states have internal predecessors, (2115), 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 03:28:37,215 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 423.0) internal successors, (2115), 5 states have internal predecessors, (2115), 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 03:28:37,215 INFO L175 Difference]: Start difference. First operand has 74 places, 71 transitions, 306 flow. Second operand 4 states and 800 transitions. [2023-08-04 03:28:37,215 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 106 transitions, 652 flow [2023-08-04 03:28:37,376 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 106 transitions, 636 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 03:28:37,377 INFO L231 Difference]: Finished difference. Result has 77 places, 72 transitions, 310 flow [2023-08-04 03:28:37,377 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=290, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=310, PETRI_PLACES=77, PETRI_TRANSITIONS=72} [2023-08-04 03:28:37,377 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 22 predicate places. [2023-08-04 03:28:37,378 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 72 transitions, 310 flow [2023-08-04 03:28:37,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 187.75) internal successors, (751), 4 states have internal predecessors, (751), 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 03:28:37,378 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:28:37,378 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 03:28:37,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-04 03:28:37,378 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 03:28:37,378 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:28:37,378 INFO L85 PathProgramCache]: Analyzing trace with hash -401088675, now seen corresponding path program 1 times [2023-08-04 03:28:37,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:28:37,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651926538] [2023-08-04 03:28:37,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:28:37,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:28:37,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:28:37,417 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-08-04 03:28:37,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:28:37,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651926538] [2023-08-04 03:28:37,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651926538] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:28:37,417 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 03:28:37,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 03:28:37,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957158533] [2023-08-04 03:28:37,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:28:37,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 03:28:37,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:28:37,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 03:28:37,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 03:28:37,438 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 423 [2023-08-04 03:28:37,439 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 72 transitions, 310 flow. Second operand has 3 states, 3 states have (on average 191.66666666666666) internal successors, (575), 3 states have internal predecessors, (575), 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 03:28:37,439 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:28:37,439 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 423 [2023-08-04 03:28:37,440 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:28:39,290 INFO L124 PetriNetUnfolderBase]: 21516/31026 cut-off events. [2023-08-04 03:28:39,290 INFO L125 PetriNetUnfolderBase]: For 28219/28239 co-relation queries the response was YES. [2023-08-04 03:28:39,440 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87249 conditions, 31026 events. 21516/31026 cut-off events. For 28219/28239 co-relation queries the response was YES. Maximal size of possible extension queue 1044. Compared 195381 event pairs, 10956 based on Foata normal form. 3/29521 useless extension candidates. Maximal degree in co-relation 87220. Up to 20255 conditions per place. [2023-08-04 03:28:39,554 INFO L140 encePairwiseOnDemand]: 415/423 looper letters, 99 selfloop transitions, 6 changer transitions 0/115 dead transitions. [2023-08-04 03:28:39,554 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 115 transitions, 717 flow [2023-08-04 03:28:39,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 03:28:39,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 03:28:39,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 630 transitions. [2023-08-04 03:28:39,557 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49645390070921985 [2023-08-04 03:28:39,557 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 630 transitions. [2023-08-04 03:28:39,557 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 630 transitions. [2023-08-04 03:28:39,557 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:28:39,557 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 630 transitions. [2023-08-04 03:28:39,559 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 210.0) internal successors, (630), 3 states have internal predecessors, (630), 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 03:28:39,560 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 423.0) internal successors, (1692), 4 states have internal predecessors, (1692), 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 03:28:39,560 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 423.0) internal successors, (1692), 4 states have internal predecessors, (1692), 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 03:28:39,561 INFO L175 Difference]: Start difference. First operand has 77 places, 72 transitions, 310 flow. Second operand 3 states and 630 transitions. [2023-08-04 03:28:39,561 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 115 transitions, 717 flow [2023-08-04 03:28:39,797 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 115 transitions, 713 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-04 03:28:39,798 INFO L231 Difference]: Finished difference. Result has 79 places, 78 transitions, 374 flow [2023-08-04 03:28:39,798 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=306, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=374, PETRI_PLACES=79, PETRI_TRANSITIONS=78} [2023-08-04 03:28:39,798 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 24 predicate places. [2023-08-04 03:28:39,798 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 78 transitions, 374 flow [2023-08-04 03:28:39,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 191.66666666666666) internal successors, (575), 3 states have internal predecessors, (575), 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 03:28:39,799 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:28:39,799 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 03:28:39,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-04 03:28:39,799 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 03:28:39,799 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:28:39,799 INFO L85 PathProgramCache]: Analyzing trace with hash -716085263, now seen corresponding path program 2 times [2023-08-04 03:28:39,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:28:39,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502168236] [2023-08-04 03:28:39,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:28:39,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:28:39,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:28:39,926 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-04 03:28:39,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:28:39,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502168236] [2023-08-04 03:28:39,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502168236] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:28:39,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830743895] [2023-08-04 03:28:39,927 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-04 03:28:39,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:28:39,927 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:28:39,928 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 03:28:39,931 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 03:28:40,055 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-04 03:28:40,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-04 03:28:40,057 INFO L262 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 03:28:40,064 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:28:40,157 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-04 03:28:40,158 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 03:28:40,198 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-04 03:28:40,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [830743895] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 03:28:40,199 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 03:28:40,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 8 [2023-08-04 03:28:40,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860769281] [2023-08-04 03:28:40,199 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 03:28:40,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-04 03:28:40,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:28:40,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-04 03:28:40,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-08-04 03:28:40,274 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 423 [2023-08-04 03:28:40,276 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 78 transitions, 374 flow. Second operand has 9 states, 9 states have (on average 182.0) internal successors, (1638), 9 states have internal predecessors, (1638), 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 03:28:40,276 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:28:40,276 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 423 [2023-08-04 03:28:40,276 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:28:47,089 INFO L124 PetriNetUnfolderBase]: 59961/85479 cut-off events. [2023-08-04 03:28:47,089 INFO L125 PetriNetUnfolderBase]: For 131434/132946 co-relation queries the response was YES. [2023-08-04 03:28:47,452 INFO L83 FinitePrefix]: Finished finitePrefix Result has 267862 conditions, 85479 events. 59961/85479 cut-off events. For 131434/132946 co-relation queries the response was YES. Maximal size of possible extension queue 2453. Compared 602356 event pairs, 2975 based on Foata normal form. 692/83199 useless extension candidates. Maximal degree in co-relation 267826. Up to 34640 conditions per place. [2023-08-04 03:28:47,757 INFO L140 encePairwiseOnDemand]: 406/423 looper letters, 269 selfloop transitions, 37 changer transitions 1/315 dead transitions. [2023-08-04 03:28:47,758 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 315 transitions, 2178 flow [2023-08-04 03:28:47,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-04 03:28:47,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-04 03:28:47,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1655 transitions. [2023-08-04 03:28:47,761 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4890661938534279 [2023-08-04 03:28:47,761 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1655 transitions. [2023-08-04 03:28:47,761 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1655 transitions. [2023-08-04 03:28:47,762 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:28:47,762 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1655 transitions. [2023-08-04 03:28:47,765 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 206.875) internal successors, (1655), 8 states have internal predecessors, (1655), 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 03:28:47,769 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 423.0) internal successors, (3807), 9 states have internal predecessors, (3807), 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 03:28:47,769 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 423.0) internal successors, (3807), 9 states have internal predecessors, (3807), 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 03:28:47,769 INFO L175 Difference]: Start difference. First operand has 79 places, 78 transitions, 374 flow. Second operand 8 states and 1655 transitions. [2023-08-04 03:28:47,769 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 315 transitions, 2178 flow [2023-08-04 03:28:48,814 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 315 transitions, 2078 flow, removed 26 selfloop flow, removed 2 redundant places. [2023-08-04 03:28:48,816 INFO L231 Difference]: Finished difference. Result has 91 places, 110 transitions, 706 flow [2023-08-04 03:28:48,816 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=350, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=706, PETRI_PLACES=91, PETRI_TRANSITIONS=110} [2023-08-04 03:28:48,816 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 36 predicate places. [2023-08-04 03:28:48,817 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 110 transitions, 706 flow [2023-08-04 03:28:48,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 182.0) internal successors, (1638), 9 states have internal predecessors, (1638), 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 03:28:48,817 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:28:48,817 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 03:28:48,821 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-08-04 03:28:49,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-08-04 03:28:49,018 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 03:28:49,018 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:28:49,019 INFO L85 PathProgramCache]: Analyzing trace with hash 1717271668, now seen corresponding path program 1 times [2023-08-04 03:28:49,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:28:49,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909248166] [2023-08-04 03:28:49,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:28:49,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:28:49,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:28:49,057 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-08-04 03:28:49,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:28:49,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909248166] [2023-08-04 03:28:49,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909248166] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:28:49,058 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 03:28:49,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 03:28:49,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68458531] [2023-08-04 03:28:49,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:28:49,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 03:28:49,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:28:49,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 03:28:49,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 03:28:49,078 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 423 [2023-08-04 03:28:49,078 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 110 transitions, 706 flow. Second operand has 3 states, 3 states have (on average 192.0) internal successors, (576), 3 states have internal predecessors, (576), 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 03:28:49,078 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:28:49,078 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 423 [2023-08-04 03:28:49,078 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:28:56,936 INFO L124 PetriNetUnfolderBase]: 54815/78509 cut-off events. [2023-08-04 03:28:56,936 INFO L125 PetriNetUnfolderBase]: For 239236/242557 co-relation queries the response was YES. [2023-08-04 03:28:57,379 INFO L83 FinitePrefix]: Finished finitePrefix Result has 301200 conditions, 78509 events. 54815/78509 cut-off events. For 239236/242557 co-relation queries the response was YES. Maximal size of possible extension queue 2387. Compared 555664 event pairs, 22859 based on Foata normal form. 1896/79395 useless extension candidates. Maximal degree in co-relation 301156. Up to 54287 conditions per place. [2023-08-04 03:28:57,853 INFO L140 encePairwiseOnDemand]: 415/423 looper letters, 143 selfloop transitions, 6 changer transitions 0/163 dead transitions. [2023-08-04 03:28:57,853 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 163 transitions, 1355 flow [2023-08-04 03:28:57,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 03:28:57,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 03:28:57,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 625 transitions. [2023-08-04 03:28:57,855 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4925137903861308 [2023-08-04 03:28:57,855 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 625 transitions. [2023-08-04 03:28:57,855 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 625 transitions. [2023-08-04 03:28:57,855 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:28:57,855 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 625 transitions. [2023-08-04 03:28:57,856 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 208.33333333333334) internal successors, (625), 3 states have internal predecessors, (625), 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 03:28:57,858 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 423.0) internal successors, (1692), 4 states have internal predecessors, (1692), 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 03:28:57,858 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 423.0) internal successors, (1692), 4 states have internal predecessors, (1692), 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 03:28:57,858 INFO L175 Difference]: Start difference. First operand has 91 places, 110 transitions, 706 flow. Second operand 3 states and 625 transitions. [2023-08-04 03:28:57,858 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 163 transitions, 1355 flow [2023-08-04 03:28:58,588 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 163 transitions, 1340 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-08-04 03:28:58,590 INFO L231 Difference]: Finished difference. Result has 94 places, 116 transitions, 785 flow [2023-08-04 03:28:58,590 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=693, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=785, PETRI_PLACES=94, PETRI_TRANSITIONS=116} [2023-08-04 03:28:58,590 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 39 predicate places. [2023-08-04 03:28:58,590 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 116 transitions, 785 flow [2023-08-04 03:28:58,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 192.0) internal successors, (576), 3 states have internal predecessors, (576), 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 03:28:58,591 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:28:58,591 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 03:28:58,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-08-04 03:28:58,591 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 03:28:58,591 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:28:58,591 INFO L85 PathProgramCache]: Analyzing trace with hash 1323816746, now seen corresponding path program 1 times [2023-08-04 03:28:58,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:28:58,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704254165] [2023-08-04 03:28:58,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:28:58,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:28:58,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:28:58,725 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-04 03:28:58,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:28:58,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704254165] [2023-08-04 03:28:58,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704254165] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:28:58,726 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 03:28:58,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 03:28:58,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508030419] [2023-08-04 03:28:58,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:28:58,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 03:28:58,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:28:58,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 03:28:58,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-04 03:28:58,771 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 423 [2023-08-04 03:28:58,771 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 116 transitions, 785 flow. Second operand has 4 states, 4 states have (on average 188.0) internal successors, (752), 4 states have internal predecessors, (752), 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 03:28:58,772 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:28:58,772 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 423 [2023-08-04 03:28:58,772 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:29:06,239 INFO L124 PetriNetUnfolderBase]: 49144/72825 cut-off events. [2023-08-04 03:29:06,239 INFO L125 PetriNetUnfolderBase]: For 278079/284089 co-relation queries the response was YES. [2023-08-04 03:29:06,679 INFO L83 FinitePrefix]: Finished finitePrefix Result has 288683 conditions, 72825 events. 49144/72825 cut-off events. For 278079/284089 co-relation queries the response was YES. Maximal size of possible extension queue 2445. Compared 548537 event pairs, 25387 based on Foata normal form. 398/71164 useless extension candidates. Maximal degree in co-relation 287477. Up to 64925 conditions per place. [2023-08-04 03:29:07,163 INFO L140 encePairwiseOnDemand]: 416/423 looper letters, 95 selfloop transitions, 2 changer transitions 41/158 dead transitions. [2023-08-04 03:29:07,163 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 158 transitions, 1327 flow [2023-08-04 03:29:07,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 03:29:07,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 03:29:07,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 802 transitions. [2023-08-04 03:29:07,165 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4739952718676123 [2023-08-04 03:29:07,165 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 802 transitions. [2023-08-04 03:29:07,165 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 802 transitions. [2023-08-04 03:29:07,166 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:29:07,166 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 802 transitions. [2023-08-04 03:29:07,167 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 200.5) internal successors, (802), 4 states have internal predecessors, (802), 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 03:29:07,169 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 423.0) internal successors, (2115), 5 states have internal predecessors, (2115), 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 03:29:07,169 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 423.0) internal successors, (2115), 5 states have internal predecessors, (2115), 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 03:29:07,169 INFO L175 Difference]: Start difference. First operand has 94 places, 116 transitions, 785 flow. Second operand 4 states and 802 transitions. [2023-08-04 03:29:07,169 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 158 transitions, 1327 flow [2023-08-04 03:29:08,417 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 158 transitions, 1311 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 03:29:08,418 INFO L231 Difference]: Finished difference. Result has 97 places, 117 transitions, 793 flow [2023-08-04 03:29:08,419 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=773, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=793, PETRI_PLACES=97, PETRI_TRANSITIONS=117} [2023-08-04 03:29:08,419 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 42 predicate places. [2023-08-04 03:29:08,419 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 117 transitions, 793 flow [2023-08-04 03:29:08,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 188.0) internal successors, (752), 4 states have internal predecessors, (752), 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 03:29:08,419 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:29:08,419 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 03:29:08,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-08-04 03:29:08,419 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 03:29:08,420 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:29:08,420 INFO L85 PathProgramCache]: Analyzing trace with hash -1735135650, now seen corresponding path program 1 times [2023-08-04 03:29:08,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:29:08,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522479882] [2023-08-04 03:29:08,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:29:08,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:29:08,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:29:08,519 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-08-04 03:29:08,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:29:08,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522479882] [2023-08-04 03:29:08,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522479882] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:29:08,520 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 03:29:08,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 03:29:08,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209170054] [2023-08-04 03:29:08,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:29:08,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 03:29:08,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:29:08,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 03:29:08,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-04 03:29:08,551 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 423 [2023-08-04 03:29:08,552 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 117 transitions, 793 flow. Second operand has 4 states, 4 states have (on average 184.5) internal successors, (738), 4 states have internal predecessors, (738), 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 03:29:08,552 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:29:08,552 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 423 [2023-08-04 03:29:08,552 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:29:16,032 INFO L124 PetriNetUnfolderBase]: 54028/76750 cut-off events. [2023-08-04 03:29:16,032 INFO L125 PetriNetUnfolderBase]: For 266501/268427 co-relation queries the response was YES. [2023-08-04 03:29:16,478 INFO L83 FinitePrefix]: Finished finitePrefix Result has 317701 conditions, 76750 events. 54028/76750 cut-off events. For 266501/268427 co-relation queries the response was YES. Maximal size of possible extension queue 2069. Compared 517941 event pairs, 12249 based on Foata normal form. 176/76863 useless extension candidates. Maximal degree in co-relation 317664. Up to 70066 conditions per place. [2023-08-04 03:29:16,774 INFO L140 encePairwiseOnDemand]: 410/423 looper letters, 126 selfloop transitions, 5 changer transitions 38/177 dead transitions. [2023-08-04 03:29:16,774 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 177 transitions, 1536 flow [2023-08-04 03:29:16,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 03:29:16,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 03:29:16,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 809 transitions. [2023-08-04 03:29:16,775 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4781323877068558 [2023-08-04 03:29:16,775 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 809 transitions. [2023-08-04 03:29:16,775 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 809 transitions. [2023-08-04 03:29:16,776 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:29:16,776 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 809 transitions. [2023-08-04 03:29:16,777 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 202.25) internal successors, (809), 4 states have internal predecessors, (809), 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 03:29:16,778 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 423.0) internal successors, (2115), 5 states have internal predecessors, (2115), 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 03:29:16,778 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 423.0) internal successors, (2115), 5 states have internal predecessors, (2115), 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 03:29:16,778 INFO L175 Difference]: Start difference. First operand has 97 places, 117 transitions, 793 flow. Second operand 4 states and 809 transitions. [2023-08-04 03:29:16,778 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 177 transitions, 1536 flow [2023-08-04 03:29:17,238 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 177 transitions, 1524 flow, removed 5 selfloop flow, removed 1 redundant places. [2023-08-04 03:29:17,240 INFO L231 Difference]: Finished difference. Result has 100 places, 117 transitions, 812 flow [2023-08-04 03:29:17,240 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=781, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=812, PETRI_PLACES=100, PETRI_TRANSITIONS=117} [2023-08-04 03:29:17,240 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 45 predicate places. [2023-08-04 03:29:17,240 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 117 transitions, 812 flow [2023-08-04 03:29:17,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 184.5) internal successors, (738), 4 states have internal predecessors, (738), 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 03:29:17,241 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:29:17,241 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 03:29:17,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-08-04 03:29:17,241 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 03:29:17,241 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:29:17,241 INFO L85 PathProgramCache]: Analyzing trace with hash -1210793373, now seen corresponding path program 1 times [2023-08-04 03:29:17,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:29:17,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071475158] [2023-08-04 03:29:17,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:29:17,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:29:17,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:29:17,338 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-04 03:29:17,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:29:17,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071475158] [2023-08-04 03:29:17,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071475158] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:29:17,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308991150] [2023-08-04 03:29:17,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:29:17,339 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:29:17,339 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:29:17,341 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 03:29:17,348 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-04 03:29:17,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:29:17,471 INFO L262 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 03:29:17,474 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:29:17,563 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-04 03:29:17,563 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 03:29:17,613 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-04 03:29:17,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1308991150] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 03:29:17,613 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 03:29:17,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 8 [2023-08-04 03:29:17,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240396084] [2023-08-04 03:29:17,613 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 03:29:17,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-04 03:29:17,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:29:17,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-04 03:29:17,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-08-04 03:29:17,676 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 423 [2023-08-04 03:29:17,677 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 117 transitions, 812 flow. Second operand has 9 states, 9 states have (on average 182.77777777777777) internal successors, (1645), 9 states have internal predecessors, (1645), 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 03:29:17,677 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:29:17,677 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 423 [2023-08-04 03:29:17,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:29:26,895 INFO L124 PetriNetUnfolderBase]: 64120/89765 cut-off events. [2023-08-04 03:29:26,895 INFO L125 PetriNetUnfolderBase]: For 330921/331895 co-relation queries the response was YES. [2023-08-04 03:29:27,475 INFO L83 FinitePrefix]: Finished finitePrefix Result has 374755 conditions, 89765 events. 64120/89765 cut-off events. For 330921/331895 co-relation queries the response was YES. Maximal size of possible extension queue 2418. Compared 605671 event pairs, 8044 based on Foata normal form. 827/90528 useless extension candidates. Maximal degree in co-relation 374710. Up to 51331 conditions per place. [2023-08-04 03:29:27,868 INFO L140 encePairwiseOnDemand]: 406/423 looper letters, 253 selfloop transitions, 37 changer transitions 0/298 dead transitions. [2023-08-04 03:29:27,868 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 298 transitions, 2506 flow [2023-08-04 03:29:27,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-04 03:29:27,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-04 03:29:27,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1602 transitions. [2023-08-04 03:29:27,871 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4734042553191489 [2023-08-04 03:29:27,871 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1602 transitions. [2023-08-04 03:29:27,871 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1602 transitions. [2023-08-04 03:29:27,872 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:29:27,872 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1602 transitions. [2023-08-04 03:29:27,874 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 200.25) internal successors, (1602), 8 states have internal predecessors, (1602), 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 03:29:27,878 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 423.0) internal successors, (3807), 9 states have internal predecessors, (3807), 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 03:29:27,878 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 423.0) internal successors, (3807), 9 states have internal predecessors, (3807), 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 03:29:27,878 INFO L175 Difference]: Start difference. First operand has 100 places, 117 transitions, 812 flow. Second operand 8 states and 1602 transitions. [2023-08-04 03:29:27,879 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 298 transitions, 2506 flow [2023-08-04 03:29:28,862 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 298 transitions, 2448 flow, removed 24 selfloop flow, removed 3 redundant places. [2023-08-04 03:29:28,864 INFO L231 Difference]: Finished difference. Result has 108 places, 141 transitions, 1145 flow [2023-08-04 03:29:28,865 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, PETRI_DIFFERENCE_MINUEND_FLOW=778, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1145, PETRI_PLACES=108, PETRI_TRANSITIONS=141} [2023-08-04 03:29:28,865 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 53 predicate places. [2023-08-04 03:29:28,865 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 141 transitions, 1145 flow [2023-08-04 03:29:28,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 182.77777777777777) internal successors, (1645), 9 states have internal predecessors, (1645), 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 03:29:28,865 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:29:28,865 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 03:29:28,870 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-08-04 03:29:29,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-08-04 03:29:29,066 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 03:29:29,066 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:29:29,066 INFO L85 PathProgramCache]: Analyzing trace with hash -1124776714, now seen corresponding path program 1 times [2023-08-04 03:29:29,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:29:29,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737278882] [2023-08-04 03:29:29,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:29:29,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:29:29,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:29:29,934 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-04 03:29:29,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:29:29,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737278882] [2023-08-04 03:29:29,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737278882] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:29:29,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193616248] [2023-08-04 03:29:29,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:29:29,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:29:29,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:29:29,937 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 03:29:29,964 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-04 03:29:30,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:29:30,086 INFO L262 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 82 conjunts are in the unsatisfiable core [2023-08-04 03:29:30,093 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:29:30,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-04 03:29:30,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-04 03:29:30,143 INFO L322 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-08-04 03:29:30,143 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 16 [2023-08-04 03:29:30,233 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-04 03:29:30,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-04 03:29:30,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-04 03:29:30,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-04 03:29:30,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-04 03:29:30,322 INFO L322 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2023-08-04 03:29:30,323 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 17 [2023-08-04 03:29:30,401 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-08-04 03:29:30,543 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-04 03:29:30,674 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-04 03:29:30,822 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-04 03:29:30,923 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-04 03:29:31,563 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 18 [2023-08-04 03:29:31,784 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-04 03:29:31,785 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 03:29:38,604 INFO L322 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2023-08-04 03:29:38,604 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 217 treesize of output 115 [2023-08-04 03:29:38,706 INFO L322 Elim1Store]: treesize reduction 5, result has 96.6 percent of original size [2023-08-04 03:29:38,706 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 645 treesize of output 714 [2023-08-04 03:29:38,775 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-04 03:29:38,803 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-04 03:29:38,804 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 187 treesize of output 235 [2023-08-04 03:29:38,837 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-04 03:29:38,867 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-04 03:29:38,867 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 185 treesize of output 209 [2023-08-04 03:29:49,997 INFO L322 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2023-08-04 03:29:49,998 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 217 treesize of output 115 [2023-08-04 03:29:50,108 INFO L322 Elim1Store]: treesize reduction 4, result has 97.3 percent of original size [2023-08-04 03:29:50,109 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 645 treesize of output 715 [2023-08-04 03:29:50,175 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-04 03:29:50,175 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 187 treesize of output 243 [2023-08-04 03:29:50,226 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-04 03:29:50,227 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 185 treesize of output 217 [2023-08-04 03:30:17,317 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 11 refuted. 5 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-04 03:30:17,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1193616248] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 03:30:17,317 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 03:30:17,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 18, 18] total 46 [2023-08-04 03:30:17,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677404271] [2023-08-04 03:30:17,318 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 03:30:17,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2023-08-04 03:30:17,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:30:17,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2023-08-04 03:30:17,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=1953, Unknown=12, NotChecked=0, Total=2162 [2023-08-04 03:30:20,512 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-04 03:30:22,655 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-04 03:30:24,853 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-04 03:30:28,019 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-04 03:30:30,214 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-04 03:30:30,487 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 423 [2023-08-04 03:30:30,489 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 141 transitions, 1145 flow. Second operand has 47 states, 47 states have (on average 92.95744680851064) internal successors, (4369), 47 states have internal predecessors, (4369), 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 03:30:30,489 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:30:30,489 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 423 [2023-08-04 03:30:30,489 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:30:34,040 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-04 03:30:46,816 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse15 (<= c_~n2~0 c_~q2_back~0)) (.cse5 (+ (* c_~q1_back~0 4) c_~q1~0.offset)) (.cse3 (+ (* c_~q1_front~0 4) c_~q1~0.offset)) (.cse1 (* c_~q2_front~0 4)) (.cse6 (* c_~q2_back~0 4)) (.cse13 (<= c_~n1~0 c_~q1_back~0)) (.cse14 (< c_~q2_back~0 0)) (.cse4 (+ c_~i~0 1)) (.cse16 (< (+ 1 |c_ULTIMATE.start_create_fresh_int_array_~i~1#1|) |c_ULTIMATE.start_create_fresh_int_array_~size#1|)) (.cse17 (< c_~q1_back~0 0))) (and (or (let ((.cse8 (select |c_#memory_int| |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|)) (.cse9 (* 4 |c_ULTIMATE.start_create_fresh_int_array_~i~1#1|))) (and (forall ((|ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| Int) (v_ArrVal_671 (Array Int Int)) (v_ArrVal_668 Int) (v_ArrVal_673 (Array Int Int))) (let ((.cse7 (store (store (store |c_#memory_int| |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base| (store .cse8 (+ .cse9 |ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|) v_ArrVal_668)) |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_671) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_673))) (let ((.cse2 (select .cse7 c_~q1~0.base)) (.cse0 (select .cse7 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (or (< (select .cse0 (+ .cse1 |ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) c_~i~0) (< (select .cse2 .cse3) .cse4) (not (= (select .cse2 .cse5) c_~j~0)) (not (= (select .cse0 (+ .cse6 |ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) c_~i~0)))))) (forall ((|ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| Int) (v_ArrVal_671 (Array Int Int)) (v_ArrVal_668 Int) (v_ArrVal_673 (Array Int Int))) (let ((.cse12 (store (store (store |c_#memory_int| |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base| (store .cse8 (+ .cse9 |ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|) v_ArrVal_668)) |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_671) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_673))) (let ((.cse11 (select .cse12 c_~q1~0.base)) (.cse10 (select .cse12 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (or (< (select .cse10 (+ .cse1 |ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) .cse4) (< (select .cse11 .cse3) c_~i~0) (not (= (select .cse11 .cse5) c_~j~0)) (not (= (select .cse10 (+ .cse6 |ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) c_~i~0)))))))) .cse13 .cse14 .cse15 .cse16 .cse17) (= c_~j~0 c_~i~0) (= |c_ULTIMATE.start_main_~#t2~0#1.offset| 0) (or .cse13 .cse14 (let ((.cse19 (+ .cse6 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) (.cse20 (+ .cse1 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|))) (and (forall ((v_ArrVal_671 (Array Int Int)) (v_ArrVal_673 (Array Int Int))) (let ((.cse22 (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_671) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_673))) (let ((.cse18 (select .cse22 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|)) (.cse21 (select .cse22 c_~q1~0.base))) (or (not (= c_~i~0 (select .cse18 .cse19))) (< (select .cse18 .cse20) c_~i~0) (not (= (select .cse21 .cse5) c_~j~0)) (< (select .cse21 .cse3) .cse4))))) (forall ((v_ArrVal_671 (Array Int Int)) (v_ArrVal_673 (Array Int Int))) (let ((.cse25 (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_671) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_673))) (let ((.cse23 (select .cse25 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|)) (.cse24 (select .cse25 c_~q1~0.base))) (or (not (= c_~i~0 (select .cse23 .cse19))) (< (select .cse23 .cse20) .cse4) (not (= (select .cse24 .cse5) c_~j~0)) (< (select .cse24 .cse3) c_~i~0))))))) (< |c_ULTIMATE.start_create_fresh_int_array_~i~1#1| |c_ULTIMATE.start_create_fresh_int_array_~size#1|) .cse15 .cse17) (or .cse13 .cse14 .cse15 .cse17 (let ((.cse27 (+ .cse6 c_~q2~0.offset)) (.cse28 (+ c_~q2~0.offset .cse1))) (and (forall ((v_ArrVal_671 (Array Int Int)) (v_ArrVal_673 (Array Int Int))) (let ((.cse30 (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_671) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_673))) (let ((.cse26 (select .cse30 c_~q2~0.base)) (.cse29 (select .cse30 c_~q1~0.base))) (or (not (= (select .cse26 .cse27) c_~i~0)) (< (select .cse26 .cse28) c_~i~0) (not (= (select .cse29 .cse5) c_~j~0)) (< (select .cse29 .cse3) .cse4))))) (forall ((v_ArrVal_671 (Array Int Int)) (v_ArrVal_673 (Array Int Int))) (let ((.cse33 (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_671) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_673))) (let ((.cse32 (select .cse33 c_~q1~0.base)) (.cse31 (select .cse33 c_~q2~0.base))) (or (not (= (select .cse31 .cse27) c_~i~0)) (not (= (select .cse32 .cse5) c_~j~0)) (< (select .cse32 .cse3) c_~i~0) (< (select .cse31 .cse28) .cse4)))))))) (or .cse13 .cse14 (let ((.cse34 (< 0 c_~q2_back~0)) (.cse35 (forall ((|v_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base_286| Int)) (or (<= |c_#StackHeapBarrier| |v_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base_286|) (not (= (select |c_#valid| |v_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base_286|) 0)))))) (and (or (and (< c_~j~0 .cse4) (= c_~q1_back~0 c_~q1_front~0)) .cse34 .cse35) (or .cse34 .cse35 (= c_~q2_front~0 c_~q2_back~0) (< c_~j~0 c_~i~0)))) .cse16 .cse17))) is different from false [2023-08-04 03:30:48,857 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-04 03:30:57,435 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-04 03:31:12,136 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-04 03:31:30,116 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-04 03:31:58,705 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-04 03:32:00,978 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-04 03:32:11,686 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-04 03:32:20,151 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-04 03:32:22,199 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-04 03:32:24,911 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-04 03:32:30,468 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-04 03:32:42,915 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-04 03:32:45,500 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-04 03:32:54,526 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-04 03:33:03,612 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-04 03:33:09,159 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-04 03:33:20,411 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-04 03:33:24,821 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-04 03:33:32,364 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-04 03:33:38,009 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-04 03:33:40,254 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-04 03:33:57,138 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-04 03:33:59,776 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-04 03:34:12,386 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-04 03:34:15,329 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-04 03:34:17,447 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-04 03:34:20,195 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-04 03:34:41,214 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-04 03:34:43,527 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-04 03:34:45,971 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-04 03:34:48,559 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-04 03:34:50,996 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-04 03:34:59,032 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-04 03:35:01,444 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-04 03:35:05,572 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-04 03:35:07,853 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-04 03:35:12,338 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-04 03:35:19,865 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-04 03:35:22,377 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1]