/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_chl-chromosome-opt-symm.wvr_bound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 02:00:00,629 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 02:00:00,719 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 02:00:00,726 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 02:00:00,727 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 02:00:00,727 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 02:00:00,728 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 02:00:00,757 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 02:00:00,758 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 02:00:00,761 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 02:00:00,762 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 02:00:00,762 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 02:00:00,763 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 02:00:00,764 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 02:00:00,764 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 02:00:00,764 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 02:00:00,765 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 02:00:00,765 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 02:00:00,765 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 02:00:00,765 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 02:00:00,765 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 02:00:00,766 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 02:00:00,766 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 02:00:00,766 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 02:00:00,767 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 02:00:00,768 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 02:00:00,768 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 02:00:00,769 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 02:00:00,769 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 02:00:00,769 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 02:00:00,769 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 02:00:00,770 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 02:00:00,770 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 02:00:00,770 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 02:00:00,770 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 02:00:00,770 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 02:00:00,770 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 02:00:00,770 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 02:00:00,770 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 02:00:00,771 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 02:00:00,771 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 02:00:00,771 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST [2023-08-04 02:00:01,028 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 02:00:01,056 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 02:00:01,058 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 02:00:01,059 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 02:00:01,059 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 02:00:01,060 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/weaver_chl-chromosome-opt-symm.wvr_bound2.c [2023-08-04 02:00:02,295 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 02:00:02,488 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 02:00:02,488 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/weaver_chl-chromosome-opt-symm.wvr_bound2.c [2023-08-04 02:00:02,495 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/751bc0199/1d38e54a0d2e4ee4b250d6c95dc2cb47/FLAG97caa8248 [2023-08-04 02:00:02,508 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/751bc0199/1d38e54a0d2e4ee4b250d6c95dc2cb47 [2023-08-04 02:00:02,512 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 02:00:02,513 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 02:00:02,514 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 02:00:02,514 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 02:00:02,520 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 02:00:02,521 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 02:00:02" (1/1) ... [2023-08-04 02:00:02,521 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@91730cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:00:02, skipping insertion in model container [2023-08-04 02:00:02,522 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 02:00:02" (1/1) ... [2023-08-04 02:00:02,540 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 02:00:02,700 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_chl-chromosome-opt-symm.wvr_bound2.c[2728,2741] [2023-08-04 02:00:02,711 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 02:00:02,719 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 02:00:02,758 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_chl-chromosome-opt-symm.wvr_bound2.c[2728,2741] [2023-08-04 02:00:02,761 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 02:00:02,776 INFO L206 MainTranslator]: Completed translation [2023-08-04 02:00:02,776 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:00:02 WrapperNode [2023-08-04 02:00:02,776 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 02:00:02,778 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 02:00:02,778 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 02:00:02,778 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 02:00:02,784 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:00:02" (1/1) ... [2023-08-04 02:00:02,804 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:00:02" (1/1) ... [2023-08-04 02:00:02,841 INFO L138 Inliner]: procedures = 24, calls = 35, calls flagged for inlining = 9, calls inlined = 11, statements flattened = 210 [2023-08-04 02:00:02,841 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 02:00:02,842 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 02:00:02,842 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 02:00:02,842 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 02:00:02,850 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:00:02" (1/1) ... [2023-08-04 02:00:02,850 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:00:02" (1/1) ... [2023-08-04 02:00:02,864 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:00:02" (1/1) ... [2023-08-04 02:00:02,864 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:00:02" (1/1) ... [2023-08-04 02:00:02,870 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:00:02" (1/1) ... [2023-08-04 02:00:02,885 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:00:02" (1/1) ... [2023-08-04 02:00:02,887 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:00:02" (1/1) ... [2023-08-04 02:00:02,888 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:00:02" (1/1) ... [2023-08-04 02:00:02,891 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 02:00:02,891 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 02:00:02,892 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 02:00:02,892 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 02:00:02,892 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:00:02" (1/1) ... [2023-08-04 02:00:02,907 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 02:00:02,917 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:00:02,934 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 02:00:02,963 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 02:00:02,979 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 02:00:02,980 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-04 02:00:02,980 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-04 02:00:02,980 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-04 02:00:02,980 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-04 02:00:02,980 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 02:00:02,980 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 02:00:02,980 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 02:00:02,981 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-04 02:00:02,981 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 02:00:02,981 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 02:00:02,982 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 02:00:02,983 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 02:00:02,984 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 02:00:03,104 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 02:00:03,106 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 02:00:03,401 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 02:00:03,411 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 02:00:03,412 INFO L302 CfgBuilder]: Removed 8 assume(true) statements. [2023-08-04 02:00:03,414 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 02:00:03 BoogieIcfgContainer [2023-08-04 02:00:03,414 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 02:00:03,417 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 02:00:03,417 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 02:00:03,430 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 02:00:03,431 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 02:00:02" (1/3) ... [2023-08-04 02:00:03,432 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b23f574 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 02:00:03, skipping insertion in model container [2023-08-04 02:00:03,432 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:00:02" (2/3) ... [2023-08-04 02:00:03,432 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b23f574 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 02:00:03, skipping insertion in model container [2023-08-04 02:00:03,432 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 02:00:03" (3/3) ... [2023-08-04 02:00:03,433 INFO L112 eAbstractionObserver]: Analyzing ICFG weaver_chl-chromosome-opt-symm.wvr_bound2.c [2023-08-04 02:00:03,441 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 02:00:03,450 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 02:00:03,451 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 02:00:03,451 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 02:00:03,583 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-04 02:00:03,618 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 207 places, 229 transitions, 480 flow [2023-08-04 02:00:03,778 INFO L124 PetriNetUnfolderBase]: 49/393 cut-off events. [2023-08-04 02:00:03,778 INFO L125 PetriNetUnfolderBase]: For 8/10 co-relation queries the response was YES. [2023-08-04 02:00:03,794 INFO L83 FinitePrefix]: Finished finitePrefix Result has 413 conditions, 393 events. 49/393 cut-off events. For 8/10 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1412 event pairs, 0 based on Foata normal form. 0/334 useless extension candidates. Maximal degree in co-relation 223. Up to 8 conditions per place. [2023-08-04 02:00:03,795 INFO L82 GeneralOperation]: Start removeDead. Operand has 207 places, 229 transitions, 480 flow [2023-08-04 02:00:03,803 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 207 places, 229 transitions, 480 flow [2023-08-04 02:00:03,807 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 02:00:03,818 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 207 places, 229 transitions, 480 flow [2023-08-04 02:00:03,819 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 207 places, 229 transitions, 480 flow [2023-08-04 02:00:03,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 207 places, 229 transitions, 480 flow [2023-08-04 02:00:03,913 INFO L124 PetriNetUnfolderBase]: 49/393 cut-off events. [2023-08-04 02:00:03,913 INFO L125 PetriNetUnfolderBase]: For 8/10 co-relation queries the response was YES. [2023-08-04 02:00:03,916 INFO L83 FinitePrefix]: Finished finitePrefix Result has 413 conditions, 393 events. 49/393 cut-off events. For 8/10 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1412 event pairs, 0 based on Foata normal form. 0/334 useless extension candidates. Maximal degree in co-relation 223. Up to 8 conditions per place. [2023-08-04 02:00:03,926 INFO L119 LiptonReduction]: Number of co-enabled transitions 9792 [2023-08-04 02:00:08,954 INFO L134 LiptonReduction]: Checked pairs total: 14642 [2023-08-04 02:00:08,955 INFO L136 LiptonReduction]: Total number of compositions: 229 [2023-08-04 02:00:08,970 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 02:00:08,976 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;@74371cad, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 02:00:08,976 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-04 02:00:08,981 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 02:00:08,982 INFO L124 PetriNetUnfolderBase]: 2/30 cut-off events. [2023-08-04 02:00:08,982 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 02:00:08,982 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:00:08,983 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-08-04 02:00:08,983 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 02:00:08,987 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:00:08,988 INFO L85 PathProgramCache]: Analyzing trace with hash -1239832344, now seen corresponding path program 1 times [2023-08-04 02:00:08,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:00:08,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917024171] [2023-08-04 02:00:08,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:00:08,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:00:09,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:00:09,333 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 02:00:09,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:00:09,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917024171] [2023-08-04 02:00:09,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917024171] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:00:09,335 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 02:00:09,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 02:00:09,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659107446] [2023-08-04 02:00:09,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:00:09,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 02:00:09,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:00:09,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 02:00:09,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 02:00:09,438 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 199 out of 458 [2023-08-04 02:00:09,441 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 46 transitions, 114 flow. Second operand has 3 states, 3 states have (on average 201.0) internal successors, (603), 3 states have internal predecessors, (603), 0 states have call successors, (0), 0 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 02:00:09,441 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:00:09,441 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 199 of 458 [2023-08-04 02:00:09,442 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:00:09,635 INFO L124 PetriNetUnfolderBase]: 934/1500 cut-off events. [2023-08-04 02:00:09,635 INFO L125 PetriNetUnfolderBase]: For 57/57 co-relation queries the response was YES. [2023-08-04 02:00:09,637 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2924 conditions, 1500 events. 934/1500 cut-off events. For 57/57 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 6656 event pairs, 550 based on Foata normal form. 0/974 useless extension candidates. Maximal degree in co-relation 2534. Up to 1368 conditions per place. [2023-08-04 02:00:09,641 INFO L140 encePairwiseOnDemand]: 452/458 looper letters, 26 selfloop transitions, 4 changer transitions 13/47 dead transitions. [2023-08-04 02:00:09,641 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 47 transitions, 198 flow [2023-08-04 02:00:09,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 02:00:09,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 02:00:09,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 641 transitions. [2023-08-04 02:00:09,657 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46652110625909754 [2023-08-04 02:00:09,658 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 641 transitions. [2023-08-04 02:00:09,659 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 641 transitions. [2023-08-04 02:00:09,661 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:00:09,663 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 641 transitions. [2023-08-04 02:00:09,667 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 213.66666666666666) internal successors, (641), 3 states have internal predecessors, (641), 0 states have call successors, (0), 0 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 02:00:09,672 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 458.0) internal successors, (1832), 4 states have internal predecessors, (1832), 0 states have call successors, (0), 0 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 02:00:09,674 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 458.0) internal successors, (1832), 4 states have internal predecessors, (1832), 0 states have call successors, (0), 0 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 02:00:09,675 INFO L175 Difference]: Start difference. First operand has 39 places, 46 transitions, 114 flow. Second operand 3 states and 641 transitions. [2023-08-04 02:00:09,676 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 47 transitions, 198 flow [2023-08-04 02:00:09,680 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 47 transitions, 198 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 02:00:09,681 INFO L231 Difference]: Finished difference. Result has 41 places, 34 transitions, 96 flow [2023-08-04 02:00:09,683 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=458, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=96, PETRI_PLACES=41, PETRI_TRANSITIONS=34} [2023-08-04 02:00:09,686 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 2 predicate places. [2023-08-04 02:00:09,686 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 34 transitions, 96 flow [2023-08-04 02:00:09,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 201.0) internal successors, (603), 3 states have internal predecessors, (603), 0 states have call successors, (0), 0 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 02:00:09,687 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:00:09,687 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:00:09,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 02:00:09,688 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 02:00:09,688 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:00:09,688 INFO L85 PathProgramCache]: Analyzing trace with hash 522465785, now seen corresponding path program 1 times [2023-08-04 02:00:09,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:00:09,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755710467] [2023-08-04 02:00:09,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:00:09,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:00:09,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:00:09,813 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 02:00:09,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:00:09,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755710467] [2023-08-04 02:00:09,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755710467] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:00:09,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380409734] [2023-08-04 02:00:09,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:00:09,815 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:00:09,815 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:00:09,818 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 02:00:09,841 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 02:00:09,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:00:09,917 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-04 02:00:09,921 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:00:09,987 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 02:00:09,987 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 02:00:10,014 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 02:00:10,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1380409734] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 02:00:10,014 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 02:00:10,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 8 [2023-08-04 02:00:10,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248202757] [2023-08-04 02:00:10,015 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 02:00:10,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-04 02:00:10,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:00:10,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-04 02:00:10,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2023-08-04 02:00:10,102 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 195 out of 458 [2023-08-04 02:00:10,104 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 34 transitions, 96 flow. Second operand has 8 states, 8 states have (on average 197.0) internal successors, (1576), 8 states have internal predecessors, (1576), 0 states have call successors, (0), 0 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 02:00:10,104 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:00:10,104 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 195 of 458 [2023-08-04 02:00:10,104 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:00:10,204 INFO L124 PetriNetUnfolderBase]: 314/529 cut-off events. [2023-08-04 02:00:10,204 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2023-08-04 02:00:10,205 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1057 conditions, 529 events. 314/529 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 1863 event pairs, 180 based on Foata normal form. 3/386 useless extension candidates. Maximal degree in co-relation 1025. Up to 477 conditions per place. [2023-08-04 02:00:10,208 INFO L140 encePairwiseOnDemand]: 453/458 looper letters, 26 selfloop transitions, 10 changer transitions 0/40 dead transitions. [2023-08-04 02:00:10,209 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 40 transitions, 192 flow [2023-08-04 02:00:10,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-04 02:00:10,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-04 02:00:10,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1212 transitions. [2023-08-04 02:00:10,214 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4410480349344978 [2023-08-04 02:00:10,217 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1212 transitions. [2023-08-04 02:00:10,217 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1212 transitions. [2023-08-04 02:00:10,221 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:00:10,222 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1212 transitions. [2023-08-04 02:00:10,224 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 202.0) internal successors, (1212), 6 states have internal predecessors, (1212), 0 states have call successors, (0), 0 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 02:00:10,229 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 458.0) internal successors, (3206), 7 states have internal predecessors, (3206), 0 states have call successors, (0), 0 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 02:00:10,231 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 458.0) internal successors, (3206), 7 states have internal predecessors, (3206), 0 states have call successors, (0), 0 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 02:00:10,231 INFO L175 Difference]: Start difference. First operand has 41 places, 34 transitions, 96 flow. Second operand 6 states and 1212 transitions. [2023-08-04 02:00:10,231 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 40 transitions, 192 flow [2023-08-04 02:00:10,233 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 40 transitions, 188 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 02:00:10,233 INFO L231 Difference]: Finished difference. Result has 39 places, 40 transitions, 158 flow [2023-08-04 02:00:10,234 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=458, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=158, PETRI_PLACES=39, PETRI_TRANSITIONS=40} [2023-08-04 02:00:10,234 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 0 predicate places. [2023-08-04 02:00:10,235 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 40 transitions, 158 flow [2023-08-04 02:00:10,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 197.0) internal successors, (1576), 8 states have internal predecessors, (1576), 0 states have call successors, (0), 0 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 02:00:10,236 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:00:10,236 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1] [2023-08-04 02:00:10,246 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-04 02:00:10,443 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 02:00:10,444 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 02:00:10,444 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:00:10,444 INFO L85 PathProgramCache]: Analyzing trace with hash -2065740888, now seen corresponding path program 2 times [2023-08-04 02:00:10,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:00:10,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558734714] [2023-08-04 02:00:10,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:00:10,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:00:10,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:00:10,632 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 02:00:10,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:00:10,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558734714] [2023-08-04 02:00:10,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558734714] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:00:10,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317333937] [2023-08-04 02:00:10,637 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-04 02:00:10,637 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:00:10,637 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:00:10,638 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 02:00:10,661 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 02:00:10,741 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-04 02:00:10,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-04 02:00:10,744 INFO L262 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-04 02:00:10,747 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:00:10,831 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 02:00:10,832 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 02:00:10,898 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 02:00:10,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [317333937] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 02:00:10,899 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 02:00:10,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 17 [2023-08-04 02:00:10,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574221041] [2023-08-04 02:00:10,899 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 02:00:10,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-04 02:00:10,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:00:10,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-04 02:00:10,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=166, Unknown=0, NotChecked=0, Total=272 [2023-08-04 02:00:11,134 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 195 out of 458 [2023-08-04 02:00:11,138 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 40 transitions, 158 flow. Second operand has 17 states, 17 states have (on average 196.47058823529412) internal successors, (3340), 17 states have internal predecessors, (3340), 0 states have call successors, (0), 0 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 02:00:11,138 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:00:11,138 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 195 of 458 [2023-08-04 02:00:11,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:00:11,300 INFO L124 PetriNetUnfolderBase]: 314/531 cut-off events. [2023-08-04 02:00:11,300 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2023-08-04 02:00:11,301 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1087 conditions, 531 events. 314/531 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 1877 event pairs, 180 based on Foata normal form. 1/386 useless extension candidates. Maximal degree in co-relation 1016. Up to 477 conditions per place. [2023-08-04 02:00:11,303 INFO L140 encePairwiseOnDemand]: 453/458 looper letters, 26 selfloop transitions, 12 changer transitions 0/42 dead transitions. [2023-08-04 02:00:11,303 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 42 transitions, 246 flow [2023-08-04 02:00:11,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-04 02:00:11,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-04 02:00:11,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1405 transitions. [2023-08-04 02:00:11,307 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4382407985028072 [2023-08-04 02:00:11,307 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1405 transitions. [2023-08-04 02:00:11,307 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1405 transitions. [2023-08-04 02:00:11,307 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:00:11,308 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1405 transitions. [2023-08-04 02:00:11,310 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 200.71428571428572) internal successors, (1405), 7 states have internal predecessors, (1405), 0 states have call successors, (0), 0 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 02:00:11,315 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 458.0) internal successors, (3664), 8 states have internal predecessors, (3664), 0 states have call successors, (0), 0 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 02:00:11,316 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 458.0) internal successors, (3664), 8 states have internal predecessors, (3664), 0 states have call successors, (0), 0 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 02:00:11,316 INFO L175 Difference]: Start difference. First operand has 39 places, 40 transitions, 158 flow. Second operand 7 states and 1405 transitions. [2023-08-04 02:00:11,317 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 42 transitions, 246 flow [2023-08-04 02:00:11,318 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 42 transitions, 230 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-04 02:00:11,319 INFO L231 Difference]: Finished difference. Result has 45 places, 42 transitions, 188 flow [2023-08-04 02:00:11,319 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=458, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=188, PETRI_PLACES=45, PETRI_TRANSITIONS=42} [2023-08-04 02:00:11,319 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 6 predicate places. [2023-08-04 02:00:11,320 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 42 transitions, 188 flow [2023-08-04 02:00:11,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 196.47058823529412) internal successors, (3340), 17 states have internal predecessors, (3340), 0 states have call successors, (0), 0 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 02:00:11,322 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:00:11,322 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1] [2023-08-04 02:00:11,328 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-04 02:00:11,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-08-04 02:00:11,528 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 02:00:11,529 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:00:11,529 INFO L85 PathProgramCache]: Analyzing trace with hash 456397881, now seen corresponding path program 3 times [2023-08-04 02:00:11,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:00:11,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262499851] [2023-08-04 02:00:11,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:00:11,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:00:11,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 02:00:11,594 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 02:00:11,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 02:00:11,657 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 02:00:11,657 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 02:00:11,658 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-04 02:00:11,660 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-04 02:00:11,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-04 02:00:11,661 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1] [2023-08-04 02:00:11,663 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN (1/2) [2023-08-04 02:00:11,664 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 02:00:11,664 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 02:00:11,708 INFO L144 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2023-08-04 02:00:11,717 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 271 places, 303 transitions, 654 flow [2023-08-04 02:00:11,859 INFO L124 PetriNetUnfolderBase]: 165/1088 cut-off events. [2023-08-04 02:00:11,859 INFO L125 PetriNetUnfolderBase]: For 72/75 co-relation queries the response was YES. [2023-08-04 02:00:11,870 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1185 conditions, 1088 events. 165/1088 cut-off events. For 72/75 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 6033 event pairs, 1 based on Foata normal form. 0/920 useless extension candidates. Maximal degree in co-relation 666. Up to 32 conditions per place. [2023-08-04 02:00:11,871 INFO L82 GeneralOperation]: Start removeDead. Operand has 271 places, 303 transitions, 654 flow [2023-08-04 02:00:11,878 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 271 places, 303 transitions, 654 flow [2023-08-04 02:00:11,878 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 02:00:11,878 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 271 places, 303 transitions, 654 flow [2023-08-04 02:00:11,879 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 271 places, 303 transitions, 654 flow [2023-08-04 02:00:11,879 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 271 places, 303 transitions, 654 flow [2023-08-04 02:00:12,008 INFO L124 PetriNetUnfolderBase]: 165/1088 cut-off events. [2023-08-04 02:00:12,009 INFO L125 PetriNetUnfolderBase]: For 72/75 co-relation queries the response was YES. [2023-08-04 02:00:12,020 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1185 conditions, 1088 events. 165/1088 cut-off events. For 72/75 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 6033 event pairs, 1 based on Foata normal form. 0/920 useless extension candidates. Maximal degree in co-relation 666. Up to 32 conditions per place. [2023-08-04 02:00:12,058 INFO L119 LiptonReduction]: Number of co-enabled transitions 30192 [2023-08-04 02:00:17,482 INFO L134 LiptonReduction]: Checked pairs total: 44992 [2023-08-04 02:00:17,482 INFO L136 LiptonReduction]: Total number of compositions: 289 [2023-08-04 02:00:17,484 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 02:00:17,485 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;@74371cad, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 02:00:17,485 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-04 02:00:17,492 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 02:00:17,493 INFO L124 PetriNetUnfolderBase]: 16/95 cut-off events. [2023-08-04 02:00:17,493 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2023-08-04 02:00:17,493 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:00:17,493 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2023-08-04 02:00:17,493 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 02:00:17,494 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:00:17,494 INFO L85 PathProgramCache]: Analyzing trace with hash 1181207969, now seen corresponding path program 1 times [2023-08-04 02:00:17,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:00:17,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393311308] [2023-08-04 02:00:17,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:00:17,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:00:17,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:00:17,540 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 02:00:17,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:00:17,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393311308] [2023-08-04 02:00:17,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393311308] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:00:17,541 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 02:00:17,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 02:00:17,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309272176] [2023-08-04 02:00:17,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:00:17,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 02:00:17,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:00:17,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 02:00:17,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 02:00:17,572 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 263 out of 592 [2023-08-04 02:00:17,573 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 72 transitions, 192 flow. Second operand has 3 states, 3 states have (on average 265.3333333333333) internal successors, (796), 3 states have internal predecessors, (796), 0 states have call successors, (0), 0 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 02:00:17,573 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:00:17,574 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 263 of 592 [2023-08-04 02:00:17,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:00:25,224 INFO L124 PetriNetUnfolderBase]: 90702/115671 cut-off events. [2023-08-04 02:00:25,224 INFO L125 PetriNetUnfolderBase]: For 6701/6701 co-relation queries the response was YES. [2023-08-04 02:00:25,385 INFO L83 FinitePrefix]: Finished finitePrefix Result has 230022 conditions, 115671 events. 90702/115671 cut-off events. For 6701/6701 co-relation queries the response was YES. Maximal size of possible extension queue 3357. Compared 633217 event pairs, 54776 based on Foata normal form. 0/85401 useless extension candidates. Maximal degree in co-relation 44040. Up to 110552 conditions per place. [2023-08-04 02:00:25,583 INFO L140 encePairwiseOnDemand]: 586/592 looper letters, 44 selfloop transitions, 4 changer transitions 17/73 dead transitions. [2023-08-04 02:00:25,583 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 73 transitions, 320 flow [2023-08-04 02:00:25,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 02:00:25,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 02:00:25,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 855 transitions. [2023-08-04 02:00:25,586 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4814189189189189 [2023-08-04 02:00:25,587 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 855 transitions. [2023-08-04 02:00:25,587 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 855 transitions. [2023-08-04 02:00:25,587 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:00:25,587 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 855 transitions. [2023-08-04 02:00:25,589 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 285.0) internal successors, (855), 3 states have internal predecessors, (855), 0 states have call successors, (0), 0 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 02:00:25,592 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 592.0) internal successors, (2368), 4 states have internal predecessors, (2368), 0 states have call successors, (0), 0 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 02:00:25,593 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 592.0) internal successors, (2368), 4 states have internal predecessors, (2368), 0 states have call successors, (0), 0 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 02:00:25,593 INFO L175 Difference]: Start difference. First operand has 59 places, 72 transitions, 192 flow. Second operand 3 states and 855 transitions. [2023-08-04 02:00:25,593 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 73 transitions, 320 flow [2023-08-04 02:00:25,604 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 73 transitions, 320 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 02:00:25,606 INFO L231 Difference]: Finished difference. Result has 61 places, 56 transitions, 154 flow [2023-08-04 02:00:25,606 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=592, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=154, PETRI_PLACES=61, PETRI_TRANSITIONS=56} [2023-08-04 02:00:25,608 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 2 predicate places. [2023-08-04 02:00:25,608 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 56 transitions, 154 flow [2023-08-04 02:00:25,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 265.3333333333333) internal successors, (796), 3 states have internal predecessors, (796), 0 states have call successors, (0), 0 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 02:00:25,608 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:00:25,609 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:00:25,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-04 02:00:25,609 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 02:00:25,609 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:00:25,609 INFO L85 PathProgramCache]: Analyzing trace with hash 1969223574, now seen corresponding path program 1 times [2023-08-04 02:00:25,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:00:25,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282859181] [2023-08-04 02:00:25,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:00:25,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:00:25,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:00:25,683 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-08-04 02:00:25,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:00:25,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282859181] [2023-08-04 02:00:25,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282859181] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:00:25,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150712355] [2023-08-04 02:00:25,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:00:25,684 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:00:25,685 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:00:25,686 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 02:00:25,691 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 02:00:25,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:00:25,779 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-04 02:00:25,780 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:00:25,809 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-08-04 02:00:25,810 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 02:00:25,830 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-08-04 02:00:25,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1150712355] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 02:00:25,830 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 02:00:25,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 8 [2023-08-04 02:00:25,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087850697] [2023-08-04 02:00:25,832 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 02:00:25,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-04 02:00:25,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:00:25,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-04 02:00:25,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2023-08-04 02:00:25,917 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 259 out of 592 [2023-08-04 02:00:25,919 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 56 transitions, 154 flow. Second operand has 8 states, 8 states have (on average 261.125) internal successors, (2089), 8 states have internal predecessors, (2089), 0 states have call successors, (0), 0 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 02:00:25,919 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:00:25,919 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 259 of 592 [2023-08-04 02:00:25,919 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:00:27,908 INFO L124 PetriNetUnfolderBase]: 25502/32388 cut-off events. [2023-08-04 02:00:27,908 INFO L125 PetriNetUnfolderBase]: For 893/893 co-relation queries the response was YES. [2023-08-04 02:00:27,948 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64603 conditions, 32388 events. 25502/32388 cut-off events. For 893/893 co-relation queries the response was YES. Maximal size of possible extension queue 1081. Compared 153527 event pairs, 15360 based on Foata normal form. 3/25244 useless extension candidates. Maximal degree in co-relation 64569. Up to 31137 conditions per place. [2023-08-04 02:00:28,055 INFO L140 encePairwiseOnDemand]: 587/592 looper letters, 44 selfloop transitions, 10 changer transitions 0/62 dead transitions. [2023-08-04 02:00:28,056 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 62 transitions, 286 flow [2023-08-04 02:00:28,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-04 02:00:28,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-04 02:00:28,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1614 transitions. [2023-08-04 02:00:28,060 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4543918918918919 [2023-08-04 02:00:28,060 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1614 transitions. [2023-08-04 02:00:28,060 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1614 transitions. [2023-08-04 02:00:28,061 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:00:28,061 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1614 transitions. [2023-08-04 02:00:28,064 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 269.0) internal successors, (1614), 6 states have internal predecessors, (1614), 0 states have call successors, (0), 0 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 02:00:28,069 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 592.0) internal successors, (4144), 7 states have internal predecessors, (4144), 0 states have call successors, (0), 0 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 02:00:28,071 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 592.0) internal successors, (4144), 7 states have internal predecessors, (4144), 0 states have call successors, (0), 0 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 02:00:28,071 INFO L175 Difference]: Start difference. First operand has 61 places, 56 transitions, 154 flow. Second operand 6 states and 1614 transitions. [2023-08-04 02:00:28,071 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 62 transitions, 286 flow [2023-08-04 02:00:28,073 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 62 transitions, 278 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-04 02:00:28,075 INFO L231 Difference]: Finished difference. Result has 59 places, 62 transitions, 212 flow [2023-08-04 02:00:28,075 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=592, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=212, PETRI_PLACES=59, PETRI_TRANSITIONS=62} [2023-08-04 02:00:28,078 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 0 predicate places. [2023-08-04 02:00:28,078 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 62 transitions, 212 flow [2023-08-04 02:00:28,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 261.125) internal successors, (2089), 8 states have internal predecessors, (2089), 0 states have call successors, (0), 0 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 02:00:28,079 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:00:28,079 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2023-08-04 02:00:28,092 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 02:00:28,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:00:28,290 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 02:00:28,290 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:00:28,290 INFO L85 PathProgramCache]: Analyzing trace with hash 691617889, now seen corresponding path program 2 times [2023-08-04 02:00:28,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:00:28,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504275032] [2023-08-04 02:00:28,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:00:28,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:00:28,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:00:28,505 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-04 02:00:28,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:00:28,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504275032] [2023-08-04 02:00:28,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504275032] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:00:28,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884070130] [2023-08-04 02:00:28,507 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-04 02:00:28,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:00:28,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:00:28,509 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 02:00:28,511 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 02:00:28,612 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-04 02:00:28,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-04 02:00:28,614 INFO L262 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-04 02:00:28,616 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:00:28,693 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-04 02:00:28,693 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 02:00:28,763 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-04 02:00:28,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1884070130] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 02:00:28,763 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 02:00:28,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 17 [2023-08-04 02:00:28,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370310838] [2023-08-04 02:00:28,764 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 02:00:28,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-04 02:00:28,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:00:28,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-04 02:00:28,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=166, Unknown=0, NotChecked=0, Total=272 [2023-08-04 02:00:28,903 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 259 out of 592 [2023-08-04 02:00:28,907 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 62 transitions, 212 flow. Second operand has 17 states, 17 states have (on average 260.52941176470586) internal successors, (4429), 17 states have internal predecessors, (4429), 0 states have call successors, (0), 0 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 02:00:28,907 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:00:28,907 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 259 of 592 [2023-08-04 02:00:28,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:00:30,809 INFO L124 PetriNetUnfolderBase]: 25502/32390 cut-off events. [2023-08-04 02:00:30,809 INFO L125 PetriNetUnfolderBase]: For 813/813 co-relation queries the response was YES. [2023-08-04 02:00:30,879 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64549 conditions, 32390 events. 25502/32390 cut-off events. For 813/813 co-relation queries the response was YES. Maximal size of possible extension queue 1081. Compared 153550 event pairs, 15360 based on Foata normal form. 1/25244 useless extension candidates. Maximal degree in co-relation 64476. Up to 31137 conditions per place. [2023-08-04 02:00:31,160 INFO L140 encePairwiseOnDemand]: 587/592 looper letters, 44 selfloop transitions, 12 changer transitions 0/64 dead transitions. [2023-08-04 02:00:31,160 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 64 transitions, 336 flow [2023-08-04 02:00:31,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-04 02:00:31,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-04 02:00:31,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1871 transitions. [2023-08-04 02:00:31,166 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.451496138996139 [2023-08-04 02:00:31,166 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1871 transitions. [2023-08-04 02:00:31,166 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1871 transitions. [2023-08-04 02:00:31,167 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:00:31,167 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1871 transitions. [2023-08-04 02:00:31,170 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 267.2857142857143) internal successors, (1871), 7 states have internal predecessors, (1871), 0 states have call successors, (0), 0 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 02:00:31,176 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 592.0) internal successors, (4736), 8 states have internal predecessors, (4736), 0 states have call successors, (0), 0 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 02:00:31,177 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 592.0) internal successors, (4736), 8 states have internal predecessors, (4736), 0 states have call successors, (0), 0 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 02:00:31,177 INFO L175 Difference]: Start difference. First operand has 59 places, 62 transitions, 212 flow. Second operand 7 states and 1871 transitions. [2023-08-04 02:00:31,178 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 64 transitions, 336 flow [2023-08-04 02:00:31,179 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 64 transitions, 320 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-04 02:00:31,180 INFO L231 Difference]: Finished difference. Result has 65 places, 64 transitions, 242 flow [2023-08-04 02:00:31,180 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=592, PETRI_DIFFERENCE_MINUEND_FLOW=196, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=242, PETRI_PLACES=65, PETRI_TRANSITIONS=64} [2023-08-04 02:00:31,181 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 6 predicate places. [2023-08-04 02:00:31,181 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 64 transitions, 242 flow [2023-08-04 02:00:31,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 260.52941176470586) internal successors, (4429), 17 states have internal predecessors, (4429), 0 states have call successors, (0), 0 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 02:00:31,182 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:00:31,183 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2023-08-04 02:00:31,191 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 02:00:31,388 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 02:00:31,388 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 02:00:31,389 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:00:31,389 INFO L85 PathProgramCache]: Analyzing trace with hash 1356445654, now seen corresponding path program 3 times [2023-08-04 02:00:31,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:00:31,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585215704] [2023-08-04 02:00:31,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:00:31,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:00:31,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:00:31,481 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-04 02:00:31,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:00:31,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585215704] [2023-08-04 02:00:31,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585215704] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:00:31,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488781480] [2023-08-04 02:00:31,482 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-04 02:00:31,482 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:00:31,483 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:00:31,485 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 02:00:31,487 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 02:00:31,734 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-04 02:00:31,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-04 02:00:31,735 INFO L262 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 02:00:31,737 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:00:31,762 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-04 02:00:31,763 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 02:00:31,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1488781480] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:00:31,763 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 02:00:31,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-04 02:00:31,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431905603] [2023-08-04 02:00:31,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:00:31,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 02:00:31,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:00:31,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 02:00:31,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 02:00:31,778 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 266 out of 592 [2023-08-04 02:00:31,779 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 64 transitions, 242 flow. Second operand has 5 states, 5 states have (on average 268.4) internal successors, (1342), 5 states have internal predecessors, (1342), 0 states have call successors, (0), 0 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 02:00:31,780 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:00:31,780 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 266 of 592 [2023-08-04 02:00:31,780 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:00:33,812 INFO L124 PetriNetUnfolderBase]: 25406/32490 cut-off events. [2023-08-04 02:00:33,812 INFO L125 PetriNetUnfolderBase]: For 697/697 co-relation queries the response was YES. [2023-08-04 02:00:33,895 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64702 conditions, 32490 events. 25406/32490 cut-off events. For 697/697 co-relation queries the response was YES. Maximal size of possible extension queue 1124. Compared 159974 event pairs, 6880 based on Foata normal form. 0/25703 useless extension candidates. Maximal degree in co-relation 64624. Up to 30859 conditions per place. [2023-08-04 02:00:34,013 INFO L140 encePairwiseOnDemand]: 588/592 looper letters, 79 selfloop transitions, 5 changer transitions 0/91 dead transitions. [2023-08-04 02:00:34,013 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 91 transitions, 462 flow [2023-08-04 02:00:34,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 02:00:34,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 02:00:34,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1405 transitions. [2023-08-04 02:00:34,018 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47466216216216217 [2023-08-04 02:00:34,018 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1405 transitions. [2023-08-04 02:00:34,018 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1405 transitions. [2023-08-04 02:00:34,019 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:00:34,019 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1405 transitions. [2023-08-04 02:00:34,023 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 281.0) internal successors, (1405), 5 states have internal predecessors, (1405), 0 states have call successors, (0), 0 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 02:00:34,028 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 592.0) internal successors, (3552), 6 states have internal predecessors, (3552), 0 states have call successors, (0), 0 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 02:00:34,041 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 592.0) internal successors, (3552), 6 states have internal predecessors, (3552), 0 states have call successors, (0), 0 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 02:00:34,041 INFO L175 Difference]: Start difference. First operand has 65 places, 64 transitions, 242 flow. Second operand 5 states and 1405 transitions. [2023-08-04 02:00:34,041 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 91 transitions, 462 flow [2023-08-04 02:00:34,042 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 91 transitions, 437 flow, removed 4 selfloop flow, removed 5 redundant places. [2023-08-04 02:00:34,044 INFO L231 Difference]: Finished difference. Result has 64 places, 66 transitions, 236 flow [2023-08-04 02:00:34,044 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=592, PETRI_DIFFERENCE_MINUEND_FLOW=213, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=236, PETRI_PLACES=64, PETRI_TRANSITIONS=66} [2023-08-04 02:00:34,044 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 5 predicate places. [2023-08-04 02:00:34,044 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 66 transitions, 236 flow [2023-08-04 02:00:34,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 268.4) internal successors, (1342), 5 states have internal predecessors, (1342), 0 states have call successors, (0), 0 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 02:00:34,046 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:00:34,046 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:00:34,057 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 02:00:34,256 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 02:00:34,259 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 02:00:34,259 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:00:34,259 INFO L85 PathProgramCache]: Analyzing trace with hash 1098809351, now seen corresponding path program 1 times [2023-08-04 02:00:34,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:00:34,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909636443] [2023-08-04 02:00:34,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:00:34,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:00:34,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:00:34,310 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2023-08-04 02:00:34,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:00:34,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909636443] [2023-08-04 02:00:34,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909636443] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:00:34,311 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 02:00:34,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 02:00:34,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048730072] [2023-08-04 02:00:34,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:00:34,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 02:00:34,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:00:34,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 02:00:34,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 02:00:34,321 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 267 out of 592 [2023-08-04 02:00:34,321 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 66 transitions, 236 flow. Second operand has 3 states, 3 states have (on average 270.3333333333333) internal successors, (811), 3 states have internal predecessors, (811), 0 states have call successors, (0), 0 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 02:00:34,322 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:00:34,322 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 267 of 592 [2023-08-04 02:00:34,322 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:00:36,512 INFO L124 PetriNetUnfolderBase]: 25129/32033 cut-off events. [2023-08-04 02:00:36,512 INFO L125 PetriNetUnfolderBase]: For 847/847 co-relation queries the response was YES. [2023-08-04 02:00:36,589 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63895 conditions, 32033 events. 25129/32033 cut-off events. For 847/847 co-relation queries the response was YES. Maximal size of possible extension queue 1107. Compared 153927 event pairs, 10590 based on Foata normal form. 1/25315 useless extension candidates. Maximal degree in co-relation 63828. Up to 30599 conditions per place. [2023-08-04 02:00:36,677 INFO L140 encePairwiseOnDemand]: 589/592 looper letters, 65 selfloop transitions, 2 changer transitions 0/74 dead transitions. [2023-08-04 02:00:36,677 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 74 transitions, 385 flow [2023-08-04 02:00:36,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 02:00:36,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 02:00:36,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 858 transitions. [2023-08-04 02:00:36,680 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4831081081081081 [2023-08-04 02:00:36,680 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 858 transitions. [2023-08-04 02:00:36,680 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 858 transitions. [2023-08-04 02:00:36,680 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:00:36,681 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 858 transitions. [2023-08-04 02:00:36,682 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 286.0) internal successors, (858), 3 states have internal predecessors, (858), 0 states have call successors, (0), 0 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 02:00:36,684 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 592.0) internal successors, (2368), 4 states have internal predecessors, (2368), 0 states have call successors, (0), 0 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 02:00:36,685 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 592.0) internal successors, (2368), 4 states have internal predecessors, (2368), 0 states have call successors, (0), 0 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 02:00:36,685 INFO L175 Difference]: Start difference. First operand has 64 places, 66 transitions, 236 flow. Second operand 3 states and 858 transitions. [2023-08-04 02:00:36,685 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 74 transitions, 385 flow [2023-08-04 02:00:36,686 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 74 transitions, 384 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 02:00:36,687 INFO L231 Difference]: Finished difference. Result has 65 places, 65 transitions, 234 flow [2023-08-04 02:00:36,688 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=592, PETRI_DIFFERENCE_MINUEND_FLOW=230, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=234, PETRI_PLACES=65, PETRI_TRANSITIONS=65} [2023-08-04 02:00:36,688 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 6 predicate places. [2023-08-04 02:00:36,688 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 65 transitions, 234 flow [2023-08-04 02:00:36,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 270.3333333333333) internal successors, (811), 3 states have internal predecessors, (811), 0 states have call successors, (0), 0 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 02:00:36,689 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:00:36,689 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:00:36,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-04 02:00:36,689 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 02:00:36,689 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:00:36,689 INFO L85 PathProgramCache]: Analyzing trace with hash -1097946406, now seen corresponding path program 1 times [2023-08-04 02:00:36,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:00:36,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960286724] [2023-08-04 02:00:36,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:00:36,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:00:36,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:00:36,756 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2023-08-04 02:00:36,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:00:36,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960286724] [2023-08-04 02:00:36,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960286724] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:00:36,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737959351] [2023-08-04 02:00:36,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:00:36,757 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:00:36,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:00:36,758 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 02:00:36,773 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 02:00:36,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:00:36,870 INFO L262 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 02:00:36,872 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:00:36,883 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2023-08-04 02:00:36,883 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 02:00:36,896 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2023-08-04 02:00:36,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1737959351] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 02:00:36,896 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 02:00:36,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 02:00:36,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591522132] [2023-08-04 02:00:36,897 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 02:00:36,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 02:00:36,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:00:36,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 02:00:36,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 02:00:36,909 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 266 out of 592 [2023-08-04 02:00:36,910 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 65 transitions, 234 flow. Second operand has 5 states, 5 states have (on average 269.4) internal successors, (1347), 5 states have internal predecessors, (1347), 0 states have call successors, (0), 0 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 02:00:36,910 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:00:36,910 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 266 of 592 [2023-08-04 02:00:36,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:00:38,554 INFO L124 PetriNetUnfolderBase]: 22443/28393 cut-off events. [2023-08-04 02:00:38,554 INFO L125 PetriNetUnfolderBase]: For 715/715 co-relation queries the response was YES. [2023-08-04 02:00:38,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56646 conditions, 28393 events. 22443/28393 cut-off events. For 715/715 co-relation queries the response was YES. Maximal size of possible extension queue 1087. Compared 131645 event pairs, 5760 based on Foata normal form. 6/22428 useless extension candidates. Maximal degree in co-relation 56579. Up to 27015 conditions per place. [2023-08-04 02:00:38,688 INFO L140 encePairwiseOnDemand]: 589/592 looper letters, 79 selfloop transitions, 3 changer transitions 0/89 dead transitions. [2023-08-04 02:00:38,688 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 89 transitions, 445 flow [2023-08-04 02:00:38,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 02:00:38,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 02:00:38,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1137 transitions. [2023-08-04 02:00:38,692 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48015202702702703 [2023-08-04 02:00:38,692 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1137 transitions. [2023-08-04 02:00:38,693 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1137 transitions. [2023-08-04 02:00:38,693 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:00:38,693 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1137 transitions. [2023-08-04 02:00:38,695 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 284.25) internal successors, (1137), 4 states have internal predecessors, (1137), 0 states have call successors, (0), 0 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 02:00:38,698 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 592.0) internal successors, (2960), 5 states have internal predecessors, (2960), 0 states have call successors, (0), 0 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 02:00:38,698 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 592.0) internal successors, (2960), 5 states have internal predecessors, (2960), 0 states have call successors, (0), 0 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 02:00:38,698 INFO L175 Difference]: Start difference. First operand has 65 places, 65 transitions, 234 flow. Second operand 4 states and 1137 transitions. [2023-08-04 02:00:38,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 89 transitions, 445 flow [2023-08-04 02:00:38,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 89 transitions, 441 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 02:00:38,701 INFO L231 Difference]: Finished difference. Result has 66 places, 64 transitions, 231 flow [2023-08-04 02:00:38,701 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=592, PETRI_DIFFERENCE_MINUEND_FLOW=225, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=231, PETRI_PLACES=66, PETRI_TRANSITIONS=64} [2023-08-04 02:00:38,701 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 7 predicate places. [2023-08-04 02:00:38,701 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 64 transitions, 231 flow [2023-08-04 02:00:38,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 269.4) internal successors, (1347), 5 states have internal predecessors, (1347), 0 states have call successors, (0), 0 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 02:00:38,702 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:00:38,702 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:00:38,715 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 02:00:38,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:00:38,909 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 02:00:38,909 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:00:38,909 INFO L85 PathProgramCache]: Analyzing trace with hash 1895103948, now seen corresponding path program 1 times [2023-08-04 02:00:38,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:00:38,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794454040] [2023-08-04 02:00:38,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:00:38,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:00:38,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:00:39,018 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-08-04 02:00:39,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:00:39,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794454040] [2023-08-04 02:00:39,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794454040] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:00:39,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982376463] [2023-08-04 02:00:39,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:00:39,019 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:00:39,019 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:00:39,020 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 02:00:39,023 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 02:00:39,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:00:39,153 INFO L262 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 02:00:39,161 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:00:39,178 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-08-04 02:00:39,178 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 02:00:39,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1982376463] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:00:39,178 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 02:00:39,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-04 02:00:39,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752643388] [2023-08-04 02:00:39,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:00:39,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 02:00:39,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:00:39,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 02:00:39,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 02:00:39,191 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 266 out of 592 [2023-08-04 02:00:39,192 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 64 transitions, 231 flow. Second operand has 5 states, 5 states have (on average 269.4) internal successors, (1347), 5 states have internal predecessors, (1347), 0 states have call successors, (0), 0 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 02:00:39,192 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:00:39,192 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 266 of 592 [2023-08-04 02:00:39,192 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:00:40,707 INFO L124 PetriNetUnfolderBase]: 15531/19473 cut-off events. [2023-08-04 02:00:40,708 INFO L125 PetriNetUnfolderBase]: For 503/503 co-relation queries the response was YES. [2023-08-04 02:00:40,733 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39338 conditions, 19473 events. 15531/19473 cut-off events. For 503/503 co-relation queries the response was YES. Maximal size of possible extension queue 784. Compared 82062 event pairs, 100 based on Foata normal form. 1296/16526 useless extension candidates. Maximal degree in co-relation 39271. Up to 9288 conditions per place. [2023-08-04 02:00:40,742 INFO L140 encePairwiseOnDemand]: 589/592 looper letters, 0 selfloop transitions, 0 changer transitions 137/137 dead transitions. [2023-08-04 02:00:40,742 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 137 transitions, 637 flow [2023-08-04 02:00:40,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 02:00:40,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 02:00:40,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1451 transitions. [2023-08-04 02:00:40,746 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4902027027027027 [2023-08-04 02:00:40,746 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1451 transitions. [2023-08-04 02:00:40,746 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1451 transitions. [2023-08-04 02:00:40,747 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:00:40,747 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1451 transitions. [2023-08-04 02:00:40,749 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 290.2) internal successors, (1451), 5 states have internal predecessors, (1451), 0 states have call successors, (0), 0 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 02:00:40,753 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 592.0) internal successors, (3552), 6 states have internal predecessors, (3552), 0 states have call successors, (0), 0 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 02:00:40,753 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 592.0) internal successors, (3552), 6 states have internal predecessors, (3552), 0 states have call successors, (0), 0 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 02:00:40,753 INFO L175 Difference]: Start difference. First operand has 66 places, 64 transitions, 231 flow. Second operand 5 states and 1451 transitions. [2023-08-04 02:00:40,754 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 137 transitions, 637 flow [2023-08-04 02:00:40,767 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 137 transitions, 630 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-04 02:00:40,768 INFO L231 Difference]: Finished difference. Result has 65 places, 0 transitions, 0 flow [2023-08-04 02:00:40,769 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=592, PETRI_DIFFERENCE_MINUEND_FLOW=220, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=0, PETRI_PLACES=65, PETRI_TRANSITIONS=0} [2023-08-04 02:00:40,769 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 6 predicate places. [2023-08-04 02:00:40,769 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 0 transitions, 0 flow [2023-08-04 02:00:40,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 269.4) internal successors, (1347), 5 states have internal predecessors, (1347), 0 states have call successors, (0), 0 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 02:00:40,770 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-04 02:00:40,770 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-04 02:00:40,777 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 02:00:40,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:00:40,977 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1, 1, 1, 1] [2023-08-04 02:00:40,978 INFO L307 ceAbstractionStarter]: Result for error location InUseError was SAFE,SAFE (1/2) [2023-08-04 02:00:40,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 271 places, 303 transitions, 654 flow [2023-08-04 02:00:41,082 INFO L124 PetriNetUnfolderBase]: 165/1088 cut-off events. [2023-08-04 02:00:41,082 INFO L125 PetriNetUnfolderBase]: For 72/75 co-relation queries the response was YES. [2023-08-04 02:00:41,089 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1185 conditions, 1088 events. 165/1088 cut-off events. For 72/75 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 6033 event pairs, 1 based on Foata normal form. 0/920 useless extension candidates. Maximal degree in co-relation 666. Up to 32 conditions per place. [2023-08-04 02:00:41,089 INFO L82 GeneralOperation]: Start removeDead. Operand has 271 places, 303 transitions, 654 flow [2023-08-04 02:00:41,094 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 271 places, 303 transitions, 654 flow [2023-08-04 02:00:41,094 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 02:00:41,094 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 271 places, 303 transitions, 654 flow [2023-08-04 02:00:41,095 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 271 places, 303 transitions, 654 flow [2023-08-04 02:00:41,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 271 places, 303 transitions, 654 flow [2023-08-04 02:00:41,197 INFO L124 PetriNetUnfolderBase]: 165/1088 cut-off events. [2023-08-04 02:00:41,197 INFO L125 PetriNetUnfolderBase]: For 72/75 co-relation queries the response was YES. [2023-08-04 02:00:41,204 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1185 conditions, 1088 events. 165/1088 cut-off events. For 72/75 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 6033 event pairs, 1 based on Foata normal form. 0/920 useless extension candidates. Maximal degree in co-relation 666. Up to 32 conditions per place. [2023-08-04 02:00:41,233 INFO L119 LiptonReduction]: Number of co-enabled transitions 30192 [2023-08-04 02:00:46,133 INFO L134 LiptonReduction]: Checked pairs total: 47816 [2023-08-04 02:00:46,133 INFO L136 LiptonReduction]: Total number of compositions: 297 [2023-08-04 02:00:46,135 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 02:00:46,135 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;@74371cad, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 02:00:46,135 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 02:00:46,137 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 02:00:46,137 INFO L124 PetriNetUnfolderBase]: 2/16 cut-off events. [2023-08-04 02:00:46,137 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 02:00:46,137 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:00:46,137 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:00:46,137 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:00:46,138 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:00:46,138 INFO L85 PathProgramCache]: Analyzing trace with hash -990567070, now seen corresponding path program 1 times [2023-08-04 02:00:46,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:00:46,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068311566] [2023-08-04 02:00:46,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:00:46,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:00:46,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:00:46,259 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 02:00:46,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:00:46,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068311566] [2023-08-04 02:00:46,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068311566] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:00:46,260 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 02:00:46,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 02:00:46,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321993462] [2023-08-04 02:00:46,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:00:46,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 02:00:46,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:00:46,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 02:00:46,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 02:00:46,291 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 263 out of 600 [2023-08-04 02:00:46,291 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 72 transitions, 192 flow. Second operand has 3 states, 3 states have (on average 265.3333333333333) internal successors, (796), 3 states have internal predecessors, (796), 0 states have call successors, (0), 0 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 02:00:46,291 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:00:46,292 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 263 of 600 [2023-08-04 02:00:46,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:00:52,315 INFO L124 PetriNetUnfolderBase]: 90702/115671 cut-off events. [2023-08-04 02:00:52,316 INFO L125 PetriNetUnfolderBase]: For 6701/6701 co-relation queries the response was YES. [2023-08-04 02:00:52,459 INFO L83 FinitePrefix]: Finished finitePrefix Result has 230022 conditions, 115671 events. 90702/115671 cut-off events. For 6701/6701 co-relation queries the response was YES. Maximal size of possible extension queue 3356. Compared 633087 event pairs, 54776 based on Foata normal form. 0/85401 useless extension candidates. Maximal degree in co-relation 44040. Up to 110552 conditions per place. [2023-08-04 02:00:52,764 INFO L140 encePairwiseOnDemand]: 594/600 looper letters, 59 selfloop transitions, 4 changer transitions 2/73 dead transitions. [2023-08-04 02:00:52,765 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 73 transitions, 320 flow [2023-08-04 02:00:52,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 02:00:52,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 02:00:52,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 855 transitions. [2023-08-04 02:00:52,767 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.475 [2023-08-04 02:00:52,767 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 855 transitions. [2023-08-04 02:00:52,767 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 855 transitions. [2023-08-04 02:00:52,767 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:00:52,768 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 855 transitions. [2023-08-04 02:00:52,769 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 285.0) internal successors, (855), 3 states have internal predecessors, (855), 0 states have call successors, (0), 0 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 02:00:52,771 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 600.0) internal successors, (2400), 4 states have internal predecessors, (2400), 0 states have call successors, (0), 0 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 02:00:52,772 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 600.0) internal successors, (2400), 4 states have internal predecessors, (2400), 0 states have call successors, (0), 0 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 02:00:52,772 INFO L175 Difference]: Start difference. First operand has 59 places, 72 transitions, 192 flow. Second operand 3 states and 855 transitions. [2023-08-04 02:00:52,772 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 73 transitions, 320 flow [2023-08-04 02:00:52,779 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 73 transitions, 320 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 02:00:52,780 INFO L231 Difference]: Finished difference. Result has 61 places, 71 transitions, 200 flow [2023-08-04 02:00:52,781 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=600, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=200, PETRI_PLACES=61, PETRI_TRANSITIONS=71} [2023-08-04 02:00:52,781 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 2 predicate places. [2023-08-04 02:00:52,781 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 71 transitions, 200 flow [2023-08-04 02:00:52,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 265.3333333333333) internal successors, (796), 3 states have internal predecessors, (796), 0 states have call successors, (0), 0 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 02:00:52,782 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:00:52,782 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:00:52,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-04 02:00:52,782 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:00:52,782 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:00:52,782 INFO L85 PathProgramCache]: Analyzing trace with hash 1843412329, now seen corresponding path program 1 times [2023-08-04 02:00:52,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:00:52,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046232823] [2023-08-04 02:00:52,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:00:52,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:00:52,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:00:52,815 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 02:00:52,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:00:52,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046232823] [2023-08-04 02:00:52,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046232823] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:00:52,815 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 02:00:52,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 02:00:52,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246899744] [2023-08-04 02:00:52,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:00:52,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 02:00:52,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:00:52,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 02:00:52,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 02:00:52,824 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 267 out of 600 [2023-08-04 02:00:52,824 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 71 transitions, 200 flow. Second operand has 3 states, 3 states have (on average 270.0) internal successors, (810), 3 states have internal predecessors, (810), 0 states have call successors, (0), 0 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 02:00:52,824 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:00:52,824 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 267 of 600 [2023-08-04 02:00:52,825 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:00:58,997 INFO L124 PetriNetUnfolderBase]: 90382/114829 cut-off events. [2023-08-04 02:00:58,997 INFO L125 PetriNetUnfolderBase]: For 6528/6528 co-relation queries the response was YES. [2023-08-04 02:00:59,183 INFO L83 FinitePrefix]: Finished finitePrefix Result has 228555 conditions, 114829 events. 90382/114829 cut-off events. For 6528/6528 co-relation queries the response was YES. Maximal size of possible extension queue 3186. Compared 619728 event pairs, 40197 based on Foata normal form. 0/85483 useless extension candidates. Maximal degree in co-relation 228530. Up to 110095 conditions per place. [2023-08-04 02:00:59,510 INFO L140 encePairwiseOnDemand]: 597/600 looper letters, 71 selfloop transitions, 2 changer transitions 0/81 dead transitions. [2023-08-04 02:00:59,510 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 81 transitions, 366 flow [2023-08-04 02:00:59,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 02:00:59,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 02:00:59,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 873 transitions. [2023-08-04 02:00:59,512 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.485 [2023-08-04 02:00:59,513 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 873 transitions. [2023-08-04 02:00:59,513 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 873 transitions. [2023-08-04 02:00:59,513 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:00:59,513 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 873 transitions. [2023-08-04 02:00:59,515 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 291.0) internal successors, (873), 3 states have internal predecessors, (873), 0 states have call successors, (0), 0 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 02:00:59,517 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 600.0) internal successors, (2400), 4 states have internal predecessors, (2400), 0 states have call successors, (0), 0 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 02:00:59,517 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 600.0) internal successors, (2400), 4 states have internal predecessors, (2400), 0 states have call successors, (0), 0 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 02:00:59,517 INFO L175 Difference]: Start difference. First operand has 61 places, 71 transitions, 200 flow. Second operand 3 states and 873 transitions. [2023-08-04 02:00:59,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 81 transitions, 366 flow [2023-08-04 02:00:59,538 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 81 transitions, 356 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-04 02:00:59,539 INFO L231 Difference]: Finished difference. Result has 59 places, 72 transitions, 202 flow [2023-08-04 02:00:59,539 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=600, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=56, 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=3, PETRI_FLOW=202, PETRI_PLACES=59, PETRI_TRANSITIONS=72} [2023-08-04 02:00:59,539 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 0 predicate places. [2023-08-04 02:00:59,540 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 72 transitions, 202 flow [2023-08-04 02:00:59,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 270.0) internal successors, (810), 3 states have internal predecessors, (810), 0 states have call successors, (0), 0 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 02:00:59,540 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:00:59,540 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:00:59,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-04 02:00:59,540 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:00:59,541 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:00:59,541 INFO L85 PathProgramCache]: Analyzing trace with hash -18117188, now seen corresponding path program 1 times [2023-08-04 02:00:59,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:00:59,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698324227] [2023-08-04 02:00:59,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:00:59,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:00:59,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:00:59,578 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 02:00:59,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:00:59,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698324227] [2023-08-04 02:00:59,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698324227] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:00:59,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [342478805] [2023-08-04 02:00:59,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:00:59,579 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:00:59,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:00:59,582 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 02:00:59,588 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 02:00:59,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:00:59,685 INFO L262 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 02:00:59,686 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:00:59,692 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 02:00:59,693 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 02:00:59,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [342478805] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:00:59,693 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 02:00:59,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 02:00:59,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088862194] [2023-08-04 02:00:59,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:00:59,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 02:00:59,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:00:59,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 02:00:59,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 02:00:59,705 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 267 out of 600 [2023-08-04 02:00:59,706 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 72 transitions, 202 flow. Second operand has 3 states, 3 states have (on average 271.0) internal successors, (813), 3 states have internal predecessors, (813), 0 states have call successors, (0), 0 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 02:00:59,706 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:00:59,706 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 267 of 600 [2023-08-04 02:00:59,706 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:01:05,510 INFO L124 PetriNetUnfolderBase]: 90340/114598 cut-off events. [2023-08-04 02:01:05,510 INFO L125 PetriNetUnfolderBase]: For 3840/3840 co-relation queries the response was YES. [2023-08-04 02:01:05,697 INFO L83 FinitePrefix]: Finished finitePrefix Result has 228114 conditions, 114598 events. 90340/114598 cut-off events. For 3840/3840 co-relation queries the response was YES. Maximal size of possible extension queue 3204. Compared 616527 event pairs, 40064 based on Foata normal form. 0/85379 useless extension candidates. Maximal degree in co-relation 228083. Up to 108770 conditions per place. [2023-08-04 02:01:06,213 INFO L140 encePairwiseOnDemand]: 597/600 looper letters, 88 selfloop transitions, 2 changer transitions 0/98 dead transitions. [2023-08-04 02:01:06,213 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 98 transitions, 434 flow [2023-08-04 02:01:06,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 02:01:06,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 02:01:06,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 889 transitions. [2023-08-04 02:01:06,215 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4938888888888889 [2023-08-04 02:01:06,215 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 889 transitions. [2023-08-04 02:01:06,216 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 889 transitions. [2023-08-04 02:01:06,216 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:01:06,216 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 889 transitions. [2023-08-04 02:01:06,218 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 296.3333333333333) internal successors, (889), 3 states have internal predecessors, (889), 0 states have call successors, (0), 0 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 02:01:06,219 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 600.0) internal successors, (2400), 4 states have internal predecessors, (2400), 0 states have call successors, (0), 0 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 02:01:06,219 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 600.0) internal successors, (2400), 4 states have internal predecessors, (2400), 0 states have call successors, (0), 0 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 02:01:06,220 INFO L175 Difference]: Start difference. First operand has 59 places, 72 transitions, 202 flow. Second operand 3 states and 889 transitions. [2023-08-04 02:01:06,220 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 98 transitions, 434 flow [2023-08-04 02:01:06,222 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 98 transitions, 432 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 02:01:06,223 INFO L231 Difference]: Finished difference. Result has 61 places, 73 transitions, 212 flow [2023-08-04 02:01:06,223 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=600, PETRI_DIFFERENCE_MINUEND_FLOW=200, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=212, PETRI_PLACES=61, PETRI_TRANSITIONS=73} [2023-08-04 02:01:06,223 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 2 predicate places. [2023-08-04 02:01:06,224 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 73 transitions, 212 flow [2023-08-04 02:01:06,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 271.0) internal successors, (813), 3 states have internal predecessors, (813), 0 states have call successors, (0), 0 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 02:01:06,224 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:01:06,224 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:01:06,229 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-04 02:01:06,425 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,SelfDestructingSolverStorable13 [2023-08-04 02:01:06,425 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:01:06,425 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:01:06,426 INFO L85 PathProgramCache]: Analyzing trace with hash 1099438712, now seen corresponding path program 1 times [2023-08-04 02:01:06,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:01:06,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542997361] [2023-08-04 02:01:06,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:01:06,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:01:06,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:01:06,496 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 02:01:06,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:01:06,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542997361] [2023-08-04 02:01:06,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542997361] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:01:06,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286291827] [2023-08-04 02:01:06,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:01:06,497 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:01:06,497 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:01:06,501 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 02:01:06,504 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 02:01:06,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:01:06,610 INFO L262 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 02:01:06,611 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:01:06,616 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-04 02:01:06,616 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 02:01:06,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [286291827] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:01:06,616 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 02:01:06,617 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 02:01:06,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440934506] [2023-08-04 02:01:06,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:01:06,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 02:01:06,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:01:06,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 02:01:06,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 02:01:06,625 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 267 out of 600 [2023-08-04 02:01:06,626 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 73 transitions, 212 flow. Second operand has 3 states, 3 states have (on average 272.0) internal successors, (816), 3 states have internal predecessors, (816), 0 states have call successors, (0), 0 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 02:01:06,626 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:01:06,626 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 267 of 600 [2023-08-04 02:01:06,626 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:01:11,144 INFO L124 PetriNetUnfolderBase]: 69188/88155 cut-off events. [2023-08-04 02:01:11,144 INFO L125 PetriNetUnfolderBase]: For 5379/5379 co-relation queries the response was YES. [2023-08-04 02:01:11,308 INFO L83 FinitePrefix]: Finished finitePrefix Result has 180076 conditions, 88155 events. 69188/88155 cut-off events. For 5379/5379 co-relation queries the response was YES. Maximal size of possible extension queue 2123. Compared 466324 event pairs, 28660 based on Foata normal form. 0/68473 useless extension candidates. Maximal degree in co-relation 180044. Up to 59244 conditions per place. [2023-08-04 02:01:11,554 INFO L140 encePairwiseOnDemand]: 597/600 looper letters, 101 selfloop transitions, 2 changer transitions 0/111 dead transitions. [2023-08-04 02:01:11,554 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 111 transitions, 504 flow [2023-08-04 02:01:11,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 02:01:11,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 02:01:11,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 901 transitions. [2023-08-04 02:01:11,556 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5005555555555555 [2023-08-04 02:01:11,556 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 901 transitions. [2023-08-04 02:01:11,556 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 901 transitions. [2023-08-04 02:01:11,557 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:01:11,557 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 901 transitions. [2023-08-04 02:01:11,559 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 300.3333333333333) internal successors, (901), 3 states have internal predecessors, (901), 0 states have call successors, (0), 0 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 02:01:11,561 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 600.0) internal successors, (2400), 4 states have internal predecessors, (2400), 0 states have call successors, (0), 0 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 02:01:11,561 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 600.0) internal successors, (2400), 4 states have internal predecessors, (2400), 0 states have call successors, (0), 0 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 02:01:11,561 INFO L175 Difference]: Start difference. First operand has 61 places, 73 transitions, 212 flow. Second operand 3 states and 901 transitions. [2023-08-04 02:01:11,561 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 111 transitions, 504 flow [2023-08-04 02:01:11,564 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 111 transitions, 502 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 02:01:11,566 INFO L231 Difference]: Finished difference. Result has 63 places, 74 transitions, 222 flow [2023-08-04 02:01:11,566 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=600, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=222, PETRI_PLACES=63, PETRI_TRANSITIONS=74} [2023-08-04 02:01:11,566 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 4 predicate places. [2023-08-04 02:01:11,567 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 74 transitions, 222 flow [2023-08-04 02:01:11,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 272.0) internal successors, (816), 3 states have internal predecessors, (816), 0 states have call successors, (0), 0 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 02:01:11,567 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:01:11,567 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] [2023-08-04 02:01:11,575 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 02:01:11,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-08-04 02:01:11,772 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:01:11,773 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:01:11,773 INFO L85 PathProgramCache]: Analyzing trace with hash -83686134, now seen corresponding path program 1 times [2023-08-04 02:01:11,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:01:11,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060361083] [2023-08-04 02:01:11,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:01:11,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:01:11,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:01:11,840 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-04 02:01:11,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:01:11,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060361083] [2023-08-04 02:01:11,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060361083] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:01:11,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431754079] [2023-08-04 02:01:11,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:01:11,841 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:01:11,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:01:11,846 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 02:01:12,068 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 02:01:12,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:01:12,168 INFO L262 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 02:01:12,174 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:01:12,180 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 02:01:12,180 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 02:01:12,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [431754079] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:01:12,180 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 02:01:12,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-08-04 02:01:12,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195132427] [2023-08-04 02:01:12,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:01:12,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 02:01:12,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:01:12,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 02:01:12,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 02:01:12,188 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 267 out of 600 [2023-08-04 02:01:12,189 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 74 transitions, 222 flow. Second operand has 3 states, 3 states have (on average 273.6666666666667) internal successors, (821), 3 states have internal predecessors, (821), 0 states have call successors, (0), 0 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 02:01:12,189 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:01:12,189 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 267 of 600 [2023-08-04 02:01:12,189 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:01:16,737 INFO L124 PetriNetUnfolderBase]: 66815/85792 cut-off events. [2023-08-04 02:01:16,737 INFO L125 PetriNetUnfolderBase]: For 15424/15424 co-relation queries the response was YES. [2023-08-04 02:01:16,888 INFO L83 FinitePrefix]: Finished finitePrefix Result has 180030 conditions, 85792 events. 66815/85792 cut-off events. For 15424/15424 co-relation queries the response was YES. Maximal size of possible extension queue 2082. Compared 455295 event pairs, 35451 based on Foata normal form. 0/68547 useless extension candidates. Maximal degree in co-relation 179997. Up to 71104 conditions per place. [2023-08-04 02:01:17,104 INFO L140 encePairwiseOnDemand]: 597/600 looper letters, 102 selfloop transitions, 2 changer transitions 0/112 dead transitions. [2023-08-04 02:01:17,104 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 112 transitions, 516 flow [2023-08-04 02:01:17,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 02:01:17,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 02:01:17,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 901 transitions. [2023-08-04 02:01:17,107 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5005555555555555 [2023-08-04 02:01:17,107 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 901 transitions. [2023-08-04 02:01:17,107 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 901 transitions. [2023-08-04 02:01:17,107 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:01:17,107 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 901 transitions. [2023-08-04 02:01:17,109 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 300.3333333333333) internal successors, (901), 3 states have internal predecessors, (901), 0 states have call successors, (0), 0 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 02:01:17,111 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 600.0) internal successors, (2400), 4 states have internal predecessors, (2400), 0 states have call successors, (0), 0 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 02:01:17,111 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 600.0) internal successors, (2400), 4 states have internal predecessors, (2400), 0 states have call successors, (0), 0 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 02:01:17,111 INFO L175 Difference]: Start difference. First operand has 63 places, 74 transitions, 222 flow. Second operand 3 states and 901 transitions. [2023-08-04 02:01:17,111 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 112 transitions, 516 flow [2023-08-04 02:01:17,340 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 112 transitions, 514 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 02:01:17,341 INFO L231 Difference]: Finished difference. Result has 65 places, 75 transitions, 232 flow [2023-08-04 02:01:17,341 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=600, PETRI_DIFFERENCE_MINUEND_FLOW=220, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=232, PETRI_PLACES=65, PETRI_TRANSITIONS=75} [2023-08-04 02:01:17,341 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 6 predicate places. [2023-08-04 02:01:17,342 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 75 transitions, 232 flow [2023-08-04 02:01:17,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 273.6666666666667) internal successors, (821), 3 states have internal predecessors, (821), 0 states have call successors, (0), 0 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 02:01:17,342 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:01:17,342 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:01:17,350 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 02:01:17,547 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,SelfDestructingSolverStorable15 [2023-08-04 02:01:17,547 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:01:17,547 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:01:17,548 INFO L85 PathProgramCache]: Analyzing trace with hash 1656689025, now seen corresponding path program 1 times [2023-08-04 02:01:17,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:01:17,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172786545] [2023-08-04 02:01:17,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:01:17,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:01:17,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:01:17,620 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 02:01:17,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:01:17,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172786545] [2023-08-04 02:01:17,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172786545] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:01:17,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702968242] [2023-08-04 02:01:17,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:01:17,621 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:01:17,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:01:17,623 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 02:01:17,625 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 02:01:17,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:01:17,748 INFO L262 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-04 02:01:17,749 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:01:17,769 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 02:01:17,769 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 02:01:17,783 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 02:01:17,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [702968242] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 02:01:17,784 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 02:01:17,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 8 [2023-08-04 02:01:17,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676652127] [2023-08-04 02:01:17,784 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 02:01:17,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-04 02:01:17,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:01:17,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-04 02:01:17,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-08-04 02:01:17,900 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 254 out of 600 [2023-08-04 02:01:17,901 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 75 transitions, 232 flow. Second operand has 8 states, 8 states have (on average 258.875) internal successors, (2071), 8 states have internal predecessors, (2071), 0 states have call successors, (0), 0 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 02:01:17,901 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:01:17,901 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 254 of 600 [2023-08-04 02:01:17,901 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:01:22,354 INFO L124 PetriNetUnfolderBase]: 61881/79134 cut-off events. [2023-08-04 02:01:22,354 INFO L125 PetriNetUnfolderBase]: For 10884/10884 co-relation queries the response was YES. [2023-08-04 02:01:22,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 166836 conditions, 79134 events. 61881/79134 cut-off events. For 10884/10884 co-relation queries the response was YES. Maximal size of possible extension queue 1999. Compared 412551 event pairs, 17923 based on Foata normal form. 9/63341 useless extension candidates. Maximal degree in co-relation 166784. Up to 75993 conditions per place. [2023-08-04 02:01:22,944 INFO L140 encePairwiseOnDemand]: 592/600 looper letters, 85 selfloop transitions, 13 changer transitions 1/107 dead transitions. [2023-08-04 02:01:22,944 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 107 transitions, 506 flow [2023-08-04 02:01:22,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-04 02:01:22,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-04 02:01:22,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2135 transitions. [2023-08-04 02:01:22,948 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44479166666666664 [2023-08-04 02:01:22,948 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2135 transitions. [2023-08-04 02:01:22,949 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2135 transitions. [2023-08-04 02:01:22,949 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:01:22,950 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2135 transitions. [2023-08-04 02:01:22,953 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 266.875) internal successors, (2135), 8 states have internal predecessors, (2135), 0 states have call successors, (0), 0 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 02:01:22,958 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 600.0) internal successors, (5400), 9 states have internal predecessors, (5400), 0 states have call successors, (0), 0 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 02:01:22,959 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 600.0) internal successors, (5400), 9 states have internal predecessors, (5400), 0 states have call successors, (0), 0 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 02:01:22,959 INFO L175 Difference]: Start difference. First operand has 65 places, 75 transitions, 232 flow. Second operand 8 states and 2135 transitions. [2023-08-04 02:01:22,959 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 107 transitions, 506 flow [2023-08-04 02:01:23,382 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 107 transitions, 504 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 02:01:23,383 INFO L231 Difference]: Finished difference. Result has 73 places, 81 transitions, 296 flow [2023-08-04 02:01:23,384 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=600, PETRI_DIFFERENCE_MINUEND_FLOW=230, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=296, PETRI_PLACES=73, PETRI_TRANSITIONS=81} [2023-08-04 02:01:23,384 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 14 predicate places. [2023-08-04 02:01:23,384 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 81 transitions, 296 flow [2023-08-04 02:01:23,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 258.875) internal successors, (2071), 8 states have internal predecessors, (2071), 0 states have call successors, (0), 0 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 02:01:23,385 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:01:23,385 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 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 02:01:23,391 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-04 02:01:23,590 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,SelfDestructingSolverStorable16 [2023-08-04 02:01:23,591 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:01:23,591 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:01:23,591 INFO L85 PathProgramCache]: Analyzing trace with hash -251972575, now seen corresponding path program 1 times [2023-08-04 02:01:23,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:01:23,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994214571] [2023-08-04 02:01:23,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:01:23,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:01:23,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:01:23,654 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-08-04 02:01:23,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:01:23,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994214571] [2023-08-04 02:01:23,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994214571] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:01:23,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657050025] [2023-08-04 02:01:23,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:01:23,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:01:23,655 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:01:23,656 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 02:01:23,685 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 02:01:23,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:01:23,812 INFO L262 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-04 02:01:23,818 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:01:23,872 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-08-04 02:01:23,872 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 02:01:23,923 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-08-04 02:01:23,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [657050025] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 02:01:23,923 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 02:01:23,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 6] total 14 [2023-08-04 02:01:23,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669556936] [2023-08-04 02:01:23,924 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 02:01:23,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-04 02:01:23,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:01:23,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-04 02:01:23,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2023-08-04 02:01:24,105 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 254 out of 600 [2023-08-04 02:01:24,107 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 81 transitions, 296 flow. Second operand has 14 states, 14 states have (on average 257.7857142857143) internal successors, (3609), 14 states have internal predecessors, (3609), 0 states have call successors, (0), 0 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 02:01:24,108 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:01:24,108 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 254 of 600 [2023-08-04 02:01:24,108 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:01:28,581 INFO L124 PetriNetUnfolderBase]: 59661/75592 cut-off events. [2023-08-04 02:01:28,582 INFO L125 PetriNetUnfolderBase]: For 5178/5178 co-relation queries the response was YES. [2023-08-04 02:01:28,706 INFO L83 FinitePrefix]: Finished finitePrefix Result has 159753 conditions, 75592 events. 59661/75592 cut-off events. For 5178/5178 co-relation queries the response was YES. Maximal size of possible extension queue 1819. Compared 380471 event pairs, 15072 based on Foata normal form. 217/60685 useless extension candidates. Maximal degree in co-relation 159676. Up to 54810 conditions per place. [2023-08-04 02:01:28,880 INFO L140 encePairwiseOnDemand]: 591/600 looper letters, 117 selfloop transitions, 15 changer transitions 1/141 dead transitions. [2023-08-04 02:01:28,880 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 141 transitions, 690 flow [2023-08-04 02:01:28,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-04 02:01:28,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-04 02:01:28,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2419 transitions. [2023-08-04 02:01:28,884 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44796296296296295 [2023-08-04 02:01:28,884 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2419 transitions. [2023-08-04 02:01:28,884 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2419 transitions. [2023-08-04 02:01:28,885 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:01:28,885 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2419 transitions. [2023-08-04 02:01:28,889 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 268.77777777777777) internal successors, (2419), 9 states have internal predecessors, (2419), 0 states have call successors, (0), 0 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 02:01:28,893 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 600.0) internal successors, (6000), 10 states have internal predecessors, (6000), 0 states have call successors, (0), 0 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 02:01:28,894 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 600.0) internal successors, (6000), 10 states have internal predecessors, (6000), 0 states have call successors, (0), 0 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 02:01:28,894 INFO L175 Difference]: Start difference. First operand has 73 places, 81 transitions, 296 flow. Second operand 9 states and 2419 transitions. [2023-08-04 02:01:28,894 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 141 transitions, 690 flow [2023-08-04 02:01:29,595 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 141 transitions, 653 flow, removed 12 selfloop flow, removed 4 redundant places. [2023-08-04 02:01:29,597 INFO L231 Difference]: Finished difference. Result has 80 places, 83 transitions, 323 flow [2023-08-04 02:01:29,597 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=600, PETRI_DIFFERENCE_MINUEND_FLOW=263, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=323, PETRI_PLACES=80, PETRI_TRANSITIONS=83} [2023-08-04 02:01:29,597 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 21 predicate places. [2023-08-04 02:01:29,597 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 83 transitions, 323 flow [2023-08-04 02:01:29,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 257.7857142857143) internal successors, (3609), 14 states have internal predecessors, (3609), 0 states have call successors, (0), 0 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 02:01:29,598 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:01:29,598 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 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] [2023-08-04 02:01:29,603 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 02:01:29,798 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,SelfDestructingSolverStorable17 [2023-08-04 02:01:29,799 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:01:29,799 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:01:29,799 INFO L85 PathProgramCache]: Analyzing trace with hash -2011949949, now seen corresponding path program 1 times [2023-08-04 02:01:29,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:01:29,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957953122] [2023-08-04 02:01:29,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:01:29,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:01:29,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:01:29,877 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2023-08-04 02:01:29,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:01:29,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957953122] [2023-08-04 02:01:29,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957953122] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:01:29,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97845697] [2023-08-04 02:01:29,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:01:29,878 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:01:29,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:01:29,881 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 02:01:29,889 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 02:01:30,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:01:30,038 INFO L262 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 02:01:30,040 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:01:30,053 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2023-08-04 02:01:30,053 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 02:01:30,065 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2023-08-04 02:01:30,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [97845697] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 02:01:30,065 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 02:01:30,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 02:01:30,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402752534] [2023-08-04 02:01:30,066 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 02:01:30,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 02:01:30,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:01:30,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 02:01:30,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 02:01:30,077 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 266 out of 600 [2023-08-04 02:01:30,078 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 83 transitions, 323 flow. Second operand has 5 states, 5 states have (on average 272.2) internal successors, (1361), 5 states have internal predecessors, (1361), 0 states have call successors, (0), 0 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 02:01:30,078 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:01:30,079 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 266 of 600 [2023-08-04 02:01:30,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:01:33,494 INFO L124 PetriNetUnfolderBase]: 43213/55064 cut-off events. [2023-08-04 02:01:33,494 INFO L125 PetriNetUnfolderBase]: For 18681/18681 co-relation queries the response was YES. [2023-08-04 02:01:33,601 INFO L83 FinitePrefix]: Finished finitePrefix Result has 120210 conditions, 55064 events. 43213/55064 cut-off events. For 18681/18681 co-relation queries the response was YES. Maximal size of possible extension queue 1478. Compared 271645 event pairs, 10467 based on Foata normal form. 864/44839 useless extension candidates. Maximal degree in co-relation 120129. Up to 21779 conditions per place. [2023-08-04 02:01:33,759 INFO L140 encePairwiseOnDemand]: 596/600 looper letters, 141 selfloop transitions, 4 changer transitions 0/153 dead transitions. [2023-08-04 02:01:33,760 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 153 transitions, 762 flow [2023-08-04 02:01:33,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 02:01:33,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 02:01:33,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1197 transitions. [2023-08-04 02:01:33,762 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49875 [2023-08-04 02:01:33,762 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1197 transitions. [2023-08-04 02:01:33,762 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1197 transitions. [2023-08-04 02:01:33,762 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:01:33,762 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1197 transitions. [2023-08-04 02:01:33,764 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 299.25) internal successors, (1197), 4 states have internal predecessors, (1197), 0 states have call successors, (0), 0 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 02:01:33,765 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 600.0) internal successors, (3000), 5 states have internal predecessors, (3000), 0 states have call successors, (0), 0 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 02:01:33,765 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 600.0) internal successors, (3000), 5 states have internal predecessors, (3000), 0 states have call successors, (0), 0 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 02:01:33,766 INFO L175 Difference]: Start difference. First operand has 80 places, 83 transitions, 323 flow. Second operand 4 states and 1197 transitions. [2023-08-04 02:01:33,766 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 153 transitions, 762 flow [2023-08-04 02:01:33,913 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 153 transitions, 734 flow, removed 3 selfloop flow, removed 6 redundant places. [2023-08-04 02:01:33,915 INFO L231 Difference]: Finished difference. Result has 79 places, 84 transitions, 316 flow [2023-08-04 02:01:33,915 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=600, PETRI_DIFFERENCE_MINUEND_FLOW=296, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=316, PETRI_PLACES=79, PETRI_TRANSITIONS=84} [2023-08-04 02:01:33,915 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 20 predicate places. [2023-08-04 02:01:33,915 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 84 transitions, 316 flow [2023-08-04 02:01:33,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 272.2) internal successors, (1361), 5 states have internal predecessors, (1361), 0 states have call successors, (0), 0 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 02:01:33,915 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:01:33,916 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 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] [2023-08-04 02:01:33,922 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-08-04 02:01:34,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:01:34,122 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:01:34,122 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:01:34,122 INFO L85 PathProgramCache]: Analyzing trace with hash -873214014, now seen corresponding path program 1 times [2023-08-04 02:01:34,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:01:34,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466097539] [2023-08-04 02:01:34,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:01:34,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:01:34,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:01:34,218 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2023-08-04 02:01:34,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:01:34,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466097539] [2023-08-04 02:01:34,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466097539] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:01:34,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887726823] [2023-08-04 02:01:34,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:01:34,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:01:34,219 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:01:34,221 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 02:01:34,231 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-08-04 02:01:34,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:01:34,385 INFO L262 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 02:01:34,386 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:01:34,396 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2023-08-04 02:01:34,396 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 02:01:34,408 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2023-08-04 02:01:34,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [887726823] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 02:01:34,408 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 02:01:34,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 02:01:34,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771861803] [2023-08-04 02:01:34,408 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 02:01:34,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 02:01:34,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:01:34,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 02:01:34,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 02:01:34,420 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 266 out of 600 [2023-08-04 02:01:34,421 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 84 transitions, 316 flow. Second operand has 5 states, 5 states have (on average 272.8) internal successors, (1364), 5 states have internal predecessors, (1364), 0 states have call successors, (0), 0 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 02:01:34,421 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:01:34,421 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 266 of 600 [2023-08-04 02:01:34,422 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:01:37,963 INFO L124 PetriNetUnfolderBase]: 43181/55009 cut-off events. [2023-08-04 02:01:37,964 INFO L125 PetriNetUnfolderBase]: For 24405/24405 co-relation queries the response was YES. [2023-08-04 02:01:38,077 INFO L83 FinitePrefix]: Finished finitePrefix Result has 125193 conditions, 55009 events. 43181/55009 cut-off events. For 24405/24405 co-relation queries the response was YES. Maximal size of possible extension queue 1484. Compared 270868 event pairs, 25747 based on Foata normal form. 25/43737 useless extension candidates. Maximal degree in co-relation 125121. Up to 51140 conditions per place. [2023-08-04 02:01:38,224 INFO L140 encePairwiseOnDemand]: 596/600 looper letters, 141 selfloop transitions, 3 changer transitions 2/154 dead transitions. [2023-08-04 02:01:38,225 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 154 transitions, 756 flow [2023-08-04 02:01:38,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 02:01:38,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 02:01:38,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1197 transitions. [2023-08-04 02:01:38,227 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49875 [2023-08-04 02:01:38,227 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1197 transitions. [2023-08-04 02:01:38,227 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1197 transitions. [2023-08-04 02:01:38,227 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:01:38,227 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1197 transitions. [2023-08-04 02:01:38,229 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 299.25) internal successors, (1197), 4 states have internal predecessors, (1197), 0 states have call successors, (0), 0 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 02:01:38,231 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 600.0) internal successors, (3000), 5 states have internal predecessors, (3000), 0 states have call successors, (0), 0 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 02:01:38,231 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 600.0) internal successors, (3000), 5 states have internal predecessors, (3000), 0 states have call successors, (0), 0 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 02:01:38,231 INFO L175 Difference]: Start difference. First operand has 79 places, 84 transitions, 316 flow. Second operand 4 states and 1197 transitions. [2023-08-04 02:01:38,231 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 154 transitions, 756 flow [2023-08-04 02:01:38,570 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 154 transitions, 752 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-04 02:01:38,571 INFO L231 Difference]: Finished difference. Result has 83 places, 83 transitions, 320 flow [2023-08-04 02:01:38,571 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=600, PETRI_DIFFERENCE_MINUEND_FLOW=312, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=320, PETRI_PLACES=83, PETRI_TRANSITIONS=83} [2023-08-04 02:01:38,571 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 24 predicate places. [2023-08-04 02:01:38,571 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 83 transitions, 320 flow [2023-08-04 02:01:38,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 272.8) internal successors, (1364), 5 states have internal predecessors, (1364), 0 states have call successors, (0), 0 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 02:01:38,572 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:01:38,572 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 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] [2023-08-04 02:01:38,577 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-08-04 02:01:38,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:01:38,775 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:01:38,777 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:01:38,777 INFO L85 PathProgramCache]: Analyzing trace with hash 75352770, now seen corresponding path program 1 times [2023-08-04 02:01:38,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:01:38,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222991826] [2023-08-04 02:01:38,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:01:38,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:01:38,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:01:38,971 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-08-04 02:01:38,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:01:38,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222991826] [2023-08-04 02:01:38,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222991826] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:01:38,973 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 02:01:38,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-04 02:01:38,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869634279] [2023-08-04 02:01:38,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:01:38,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 02:01:38,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:01:38,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 02:01:38,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-04 02:01:39,002 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 264 out of 600 [2023-08-04 02:01:39,003 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 83 transitions, 320 flow. Second operand has 4 states, 4 states have (on average 272.75) internal successors, (1091), 4 states have internal predecessors, (1091), 0 states have call successors, (0), 0 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 02:01:39,003 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:01:39,003 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 264 of 600 [2023-08-04 02:01:39,003 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:01:45,070 INFO L124 PetriNetUnfolderBase]: 77184/98755 cut-off events. [2023-08-04 02:01:45,070 INFO L125 PetriNetUnfolderBase]: For 47332/47332 co-relation queries the response was YES. [2023-08-04 02:01:45,314 INFO L83 FinitePrefix]: Finished finitePrefix Result has 222183 conditions, 98755 events. 77184/98755 cut-off events. For 47332/47332 co-relation queries the response was YES. Maximal size of possible extension queue 2738. Compared 544020 event pairs, 15215 based on Foata normal form. 0/79656 useless extension candidates. Maximal degree in co-relation 222109. Up to 52041 conditions per place. [2023-08-04 02:01:45,587 INFO L140 encePairwiseOnDemand]: 593/600 looper letters, 146 selfloop transitions, 6 changer transitions 0/160 dead transitions. [2023-08-04 02:01:45,587 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 160 transitions, 921 flow [2023-08-04 02:01:45,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 02:01:45,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 02:01:45,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1189 transitions. [2023-08-04 02:01:45,590 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49541666666666667 [2023-08-04 02:01:45,590 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1189 transitions. [2023-08-04 02:01:45,590 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1189 transitions. [2023-08-04 02:01:45,590 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:01:45,590 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1189 transitions. [2023-08-04 02:01:45,591 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 297.25) internal successors, (1189), 4 states have internal predecessors, (1189), 0 states have call successors, (0), 0 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 02:01:45,593 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 600.0) internal successors, (3000), 5 states have internal predecessors, (3000), 0 states have call successors, (0), 0 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 02:01:45,593 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 600.0) internal successors, (3000), 5 states have internal predecessors, (3000), 0 states have call successors, (0), 0 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 02:01:45,593 INFO L175 Difference]: Start difference. First operand has 83 places, 83 transitions, 320 flow. Second operand 4 states and 1189 transitions. [2023-08-04 02:01:45,594 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 160 transitions, 921 flow [2023-08-04 02:01:45,904 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 160 transitions, 901 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-08-04 02:01:45,905 INFO L231 Difference]: Finished difference. Result has 86 places, 89 transitions, 362 flow [2023-08-04 02:01:45,906 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=600, PETRI_DIFFERENCE_MINUEND_FLOW=312, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=362, PETRI_PLACES=86, PETRI_TRANSITIONS=89} [2023-08-04 02:01:45,906 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 27 predicate places. [2023-08-04 02:01:45,906 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 89 transitions, 362 flow [2023-08-04 02:01:45,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 272.75) internal successors, (1091), 4 states have internal predecessors, (1091), 0 states have call successors, (0), 0 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 02:01:45,906 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:01:45,906 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 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] [2023-08-04 02:01:45,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-08-04 02:01:45,907 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:01:45,907 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:01:45,907 INFO L85 PathProgramCache]: Analyzing trace with hash -1637494962, now seen corresponding path program 1 times [2023-08-04 02:01:45,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:01:45,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035484687] [2023-08-04 02:01:45,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:01:45,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:01:45,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:01:46,032 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2023-08-04 02:01:46,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:01:46,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035484687] [2023-08-04 02:01:46,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035484687] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:01:46,033 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 02:01:46,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-04 02:01:46,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796189156] [2023-08-04 02:01:46,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:01:46,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 02:01:46,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:01:46,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 02:01:46,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-04 02:01:46,053 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 264 out of 600 [2023-08-04 02:01:46,054 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 89 transitions, 362 flow. Second operand has 4 states, 4 states have (on average 272.75) internal successors, (1091), 4 states have internal predecessors, (1091), 0 states have call successors, (0), 0 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 02:01:46,054 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:01:46,054 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 264 of 600 [2023-08-04 02:01:46,054 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:01:58,931 INFO L124 PetriNetUnfolderBase]: 140295/179719 cut-off events. [2023-08-04 02:01:58,932 INFO L125 PetriNetUnfolderBase]: For 101517/101517 co-relation queries the response was YES. [2023-08-04 02:01:59,701 INFO L83 FinitePrefix]: Finished finitePrefix Result has 435611 conditions, 179719 events. 140295/179719 cut-off events. For 101517/101517 co-relation queries the response was YES. Maximal size of possible extension queue 4663. Compared 1068867 event pairs, 23882 based on Foata normal form. 0/158122 useless extension candidates. Maximal degree in co-relation 435536. Up to 94829 conditions per place. [2023-08-04 02:02:00,601 INFO L140 encePairwiseOnDemand]: 593/600 looper letters, 157 selfloop transitions, 8 changer transitions 0/173 dead transitions. [2023-08-04 02:02:00,602 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 173 transitions, 1042 flow [2023-08-04 02:02:00,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 02:02:00,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 02:02:00,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1192 transitions. [2023-08-04 02:02:00,604 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49666666666666665 [2023-08-04 02:02:00,604 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1192 transitions. [2023-08-04 02:02:00,604 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1192 transitions. [2023-08-04 02:02:00,604 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:02:00,604 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1192 transitions. [2023-08-04 02:02:00,606 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 298.0) internal successors, (1192), 4 states have internal predecessors, (1192), 0 states have call successors, (0), 0 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 02:02:00,607 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 600.0) internal successors, (3000), 5 states have internal predecessors, (3000), 0 states have call successors, (0), 0 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 02:02:00,607 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 600.0) internal successors, (3000), 5 states have internal predecessors, (3000), 0 states have call successors, (0), 0 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 02:02:00,607 INFO L175 Difference]: Start difference. First operand has 86 places, 89 transitions, 362 flow. Second operand 4 states and 1192 transitions. [2023-08-04 02:02:00,607 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 173 transitions, 1042 flow [2023-08-04 02:02:01,016 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 173 transitions, 1042 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 02:02:01,018 INFO L231 Difference]: Finished difference. Result has 92 places, 97 transitions, 440 flow [2023-08-04 02:02:01,018 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=600, PETRI_DIFFERENCE_MINUEND_FLOW=362, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=440, PETRI_PLACES=92, PETRI_TRANSITIONS=97} [2023-08-04 02:02:01,018 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 33 predicate places. [2023-08-04 02:02:01,018 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 97 transitions, 440 flow [2023-08-04 02:02:01,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 272.75) internal successors, (1091), 4 states have internal predecessors, (1091), 0 states have call successors, (0), 0 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 02:02:01,019 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:02:01,019 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 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 02:02:01,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-08-04 02:02:01,019 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:02:01,019 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:02:01,019 INFO L85 PathProgramCache]: Analyzing trace with hash -2024457827, now seen corresponding path program 1 times [2023-08-04 02:02:01,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:02:01,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225224186] [2023-08-04 02:02:01,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:02:01,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:02:01,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:02:01,093 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-08-04 02:02:01,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:02:01,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225224186] [2023-08-04 02:02:01,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225224186] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:02:01,094 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 02:02:01,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-04 02:02:01,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086519818] [2023-08-04 02:02:01,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:02:01,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 02:02:01,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:02:01,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 02:02:01,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-04 02:02:01,115 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 264 out of 600 [2023-08-04 02:02:01,115 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 97 transitions, 440 flow. Second operand has 4 states, 4 states have (on average 273.0) internal successors, (1092), 4 states have internal predecessors, (1092), 0 states have call successors, (0), 0 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 02:02:01,115 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:02:01,116 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 264 of 600 [2023-08-04 02:02:01,116 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:02:24,716 INFO L124 PetriNetUnfolderBase]: 245132/313491 cut-off events. [2023-08-04 02:02:24,716 INFO L125 PetriNetUnfolderBase]: For 236957/236957 co-relation queries the response was YES. [2023-08-04 02:02:25,791 INFO L83 FinitePrefix]: Finished finitePrefix Result has 814201 conditions, 313491 events. 245132/313491 cut-off events. For 236957/236957 co-relation queries the response was YES. Maximal size of possible extension queue 8238. Compared 1933593 event pairs, 71720 based on Foata normal form. 4159/300657 useless extension candidates. Maximal degree in co-relation 814123. Up to 172429 conditions per place. [2023-08-04 02:02:27,073 INFO L140 encePairwiseOnDemand]: 593/600 looper letters, 153 selfloop transitions, 8 changer transitions 0/169 dead transitions. [2023-08-04 02:02:27,073 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 169 transitions, 1074 flow [2023-08-04 02:02:27,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 02:02:27,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 02:02:27,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1187 transitions. [2023-08-04 02:02:27,075 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4945833333333333 [2023-08-04 02:02:27,075 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1187 transitions. [2023-08-04 02:02:27,075 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1187 transitions. [2023-08-04 02:02:27,076 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:02:27,076 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1187 transitions. [2023-08-04 02:02:27,077 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 296.75) internal successors, (1187), 4 states have internal predecessors, (1187), 0 states have call successors, (0), 0 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 02:02:27,079 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 600.0) internal successors, (3000), 5 states have internal predecessors, (3000), 0 states have call successors, (0), 0 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 02:02:27,079 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 600.0) internal successors, (3000), 5 states have internal predecessors, (3000), 0 states have call successors, (0), 0 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 02:02:27,079 INFO L175 Difference]: Start difference. First operand has 92 places, 97 transitions, 440 flow. Second operand 4 states and 1187 transitions. [2023-08-04 02:02:27,079 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 169 transitions, 1074 flow [2023-08-04 02:02:38,908 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 169 transitions, 1074 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 02:02:38,910 INFO L231 Difference]: Finished difference. Result has 97 places, 100 transitions, 487 flow [2023-08-04 02:02:38,910 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=600, PETRI_DIFFERENCE_MINUEND_FLOW=440, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=487, PETRI_PLACES=97, PETRI_TRANSITIONS=100} [2023-08-04 02:02:38,910 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 38 predicate places. [2023-08-04 02:02:38,910 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 100 transitions, 487 flow [2023-08-04 02:02:38,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 273.0) internal successors, (1092), 4 states have internal predecessors, (1092), 0 states have call successors, (0), 0 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 02:02:38,911 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:02:38,911 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 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 02:02:38,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-08-04 02:02:38,911 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:02:38,911 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:02:38,911 INFO L85 PathProgramCache]: Analyzing trace with hash -770665718, now seen corresponding path program 1 times [2023-08-04 02:02:38,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:02:38,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581523774] [2023-08-04 02:02:38,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:02:38,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:02:38,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:02:38,975 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2023-08-04 02:02:38,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:02:38,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581523774] [2023-08-04 02:02:38,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581523774] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:02:38,975 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 02:02:38,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-04 02:02:38,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912890817] [2023-08-04 02:02:38,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:02:38,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 02:02:38,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:02:38,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 02:02:38,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-04 02:02:39,004 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 264 out of 600 [2023-08-04 02:02:39,005 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 100 transitions, 487 flow. Second operand has 4 states, 4 states have (on average 273.0) internal successors, (1092), 4 states have internal predecessors, (1092), 0 states have call successors, (0), 0 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 02:02:39,005 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:02:39,005 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 264 of 600 [2023-08-04 02:02:39,005 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:03:43,766 INFO L124 PetriNetUnfolderBase]: 505439/652710 cut-off events. [2023-08-04 02:03:43,766 INFO L125 PetriNetUnfolderBase]: For 592443/592443 co-relation queries the response was YES. [2023-08-04 02:03:46,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1739392 conditions, 652710 events. 505439/652710 cut-off events. For 592443/592443 co-relation queries the response was YES. Maximal size of possible extension queue 16398. Compared 4479916 event pairs, 184385 based on Foata normal form. 4788/639348 useless extension candidates. Maximal degree in co-relation 1739311. Up to 302994 conditions per place. [2023-08-04 02:03:48,600 INFO L140 encePairwiseOnDemand]: 592/600 looper letters, 188 selfloop transitions, 6 changer transitions 8/210 dead transitions. [2023-08-04 02:03:48,600 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 210 transitions, 1379 flow [2023-08-04 02:03:48,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 02:03:48,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 02:03:48,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1478 transitions. [2023-08-04 02:03:48,602 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49266666666666664 [2023-08-04 02:03:48,602 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1478 transitions. [2023-08-04 02:03:48,602 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1478 transitions. [2023-08-04 02:03:48,603 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:03:48,603 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1478 transitions. [2023-08-04 02:03:48,604 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 295.6) internal successors, (1478), 5 states have internal predecessors, (1478), 0 states have call successors, (0), 0 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 02:03:48,606 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 600.0) internal successors, (3600), 6 states have internal predecessors, (3600), 0 states have call successors, (0), 0 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 02:03:48,606 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 600.0) internal successors, (3600), 6 states have internal predecessors, (3600), 0 states have call successors, (0), 0 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 02:03:48,606 INFO L175 Difference]: Start difference. First operand has 97 places, 100 transitions, 487 flow. Second operand 5 states and 1478 transitions. [2023-08-04 02:03:48,606 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 210 transitions, 1379 flow [2023-08-04 02:04:50,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 210 transitions, 1374 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 02:04:50,668 INFO L231 Difference]: Finished difference. Result has 102 places, 102 transitions, 519 flow [2023-08-04 02:04:50,669 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=600, PETRI_DIFFERENCE_MINUEND_FLOW=482, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=519, PETRI_PLACES=102, PETRI_TRANSITIONS=102} [2023-08-04 02:04:50,669 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 43 predicate places. [2023-08-04 02:04:50,669 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 102 transitions, 519 flow [2023-08-04 02:04:50,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 273.0) internal successors, (1092), 4 states have internal predecessors, (1092), 0 states have call successors, (0), 0 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 02:04:50,669 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:04:50,669 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 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 02:04:50,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-08-04 02:04:50,670 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:04:50,670 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:04:50,670 INFO L85 PathProgramCache]: Analyzing trace with hash -429474630, now seen corresponding path program 2 times [2023-08-04 02:04:50,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:04:50,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924025184] [2023-08-04 02:04:50,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:04:50,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:04:50,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:04:50,751 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-08-04 02:04:50,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:04:50,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924025184] [2023-08-04 02:04:50,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924025184] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:04:50,752 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 02:04:50,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-04 02:04:50,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711710297] [2023-08-04 02:04:50,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:04:50,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 02:04:50,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:04:50,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 02:04:50,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-04 02:04:50,773 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 264 out of 600 [2023-08-04 02:04:50,774 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 102 transitions, 519 flow. Second operand has 4 states, 4 states have (on average 273.0) internal successors, (1092), 4 states have internal predecessors, (1092), 0 states have call successors, (0), 0 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 02:04:50,774 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:04:50,774 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 264 of 600 [2023-08-04 02:04:50,774 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:06:15,611 INFO L124 PetriNetUnfolderBase]: 680470/877391 cut-off events. [2023-08-04 02:06:15,611 INFO L125 PetriNetUnfolderBase]: For 971088/971088 co-relation queries the response was YES. [2023-08-04 02:06:20,605 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2452212 conditions, 877391 events. 680470/877391 cut-off events. For 971088/971088 co-relation queries the response was YES. Maximal size of possible extension queue 21638. Compared 6140655 event pairs, 302055 based on Foata normal form. 7066/884435 useless extension candidates. Maximal degree in co-relation 2452127. Up to 627237 conditions per place. [2023-08-04 02:06:25,424 INFO L140 encePairwiseOnDemand]: 593/600 looper letters, 159 selfloop transitions, 9 changer transitions 5/181 dead transitions. [2023-08-04 02:06:25,425 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 181 transitions, 1248 flow [2023-08-04 02:06:25,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 02:06:25,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 02:06:25,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1192 transitions. [2023-08-04 02:06:25,428 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49666666666666665 [2023-08-04 02:06:25,428 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1192 transitions. [2023-08-04 02:06:25,428 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1192 transitions. [2023-08-04 02:06:25,428 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:06:25,428 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1192 transitions. [2023-08-04 02:06:25,430 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 298.0) internal successors, (1192), 4 states have internal predecessors, (1192), 0 states have call successors, (0), 0 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 02:06:25,432 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 600.0) internal successors, (3000), 5 states have internal predecessors, (3000), 0 states have call successors, (0), 0 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 02:06:25,432 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 600.0) internal successors, (3000), 5 states have internal predecessors, (3000), 0 states have call successors, (0), 0 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 02:06:25,432 INFO L175 Difference]: Start difference. First operand has 102 places, 102 transitions, 519 flow. Second operand 4 states and 1192 transitions. [2023-08-04 02:06:25,432 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 181 transitions, 1248 flow Received shutdown request... [2023-08-04 02:10:04,336 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-04 02:10:05,424 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Cannot interrupt operation gracefully because timeout expired. Forcing shutdown