/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.order.of.the.error.locations.to.be.checked PROGRAM_FIRST -tc /storage/repos/CAV22/benchmarks/AutomizerCInline.xml -i /storage/repos/CAV22/benchmarks/increased_bounds/weaver_chl-node-symm.wvr_bound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 08:26:41,688 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 08:26:41,734 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 08:26:41,737 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 08:26:41,738 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 08:26:41,738 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 08:26:41,738 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 08:26:41,759 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 08:26:41,760 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 08:26:41,760 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 08:26:41,761 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 08:26:41,761 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 08:26:41,762 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 08:26:41,762 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 08:26:41,762 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 08:26:41,763 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 08:26:41,763 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 08:26:41,763 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 08:26:41,764 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 08:26:41,764 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 08:26:41,764 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 08:26:41,765 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 08:26:41,765 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 08:26:41,765 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 08:26:41,771 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 08:26:41,772 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 08:26:41,772 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 08:26:41,772 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 08:26:41,773 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 08:26:41,773 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 08:26:41,773 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 08:26:41,773 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 08:26:41,774 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 08:26:41,774 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 08:26:41,774 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 08:26:41,774 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 08:26:41,775 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 08:26:41,775 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 08:26:41,775 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 08:26:41,775 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 08:26:41,776 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 08:26:41,779 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-04 08:26:42,025 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 08:26:42,053 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 08:26:42,055 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 08:26:42,056 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 08:26:42,057 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 08:26:42,058 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/weaver_chl-node-symm.wvr_bound2.c [2023-08-04 08:26:43,259 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 08:26:43,474 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 08:26:43,474 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/weaver_chl-node-symm.wvr_bound2.c [2023-08-04 08:26:43,481 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/348541302/162de8d45a5842749dc62fb7a5e122a5/FLAG27a773574 [2023-08-04 08:26:43,494 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/348541302/162de8d45a5842749dc62fb7a5e122a5 [2023-08-04 08:26:43,497 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 08:26:43,499 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 08:26:43,500 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 08:26:43,500 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 08:26:43,503 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 08:26:43,504 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 08:26:43" (1/1) ... [2023-08-04 08:26:43,505 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7ebf8f0a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:26:43, skipping insertion in model container [2023-08-04 08:26:43,505 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 08:26:43" (1/1) ... [2023-08-04 08:26:43,538 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 08:26:43,684 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-node-symm.wvr_bound2.c[3467,3480] [2023-08-04 08:26:43,692 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 08:26:43,700 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 08:26:43,722 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-node-symm.wvr_bound2.c[3467,3480] [2023-08-04 08:26:43,728 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 08:26:43,741 INFO L206 MainTranslator]: Completed translation [2023-08-04 08:26:43,742 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:26:43 WrapperNode [2023-08-04 08:26:43,742 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 08:26:43,743 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 08:26:43,743 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 08:26:43,743 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 08:26:43,749 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:26:43" (1/1) ... [2023-08-04 08:26:43,761 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:26:43" (1/1) ... [2023-08-04 08:26:43,790 INFO L138 Inliner]: procedures = 26, calls = 50, calls flagged for inlining = 18, calls inlined = 24, statements flattened = 326 [2023-08-04 08:26:43,791 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 08:26:43,792 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 08:26:43,792 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 08:26:43,792 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 08:26:43,799 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:26:43" (1/1) ... [2023-08-04 08:26:43,800 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:26:43" (1/1) ... [2023-08-04 08:26:43,804 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:26:43" (1/1) ... [2023-08-04 08:26:43,809 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:26:43" (1/1) ... [2023-08-04 08:26:43,830 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:26:43" (1/1) ... [2023-08-04 08:26:43,835 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:26:43" (1/1) ... [2023-08-04 08:26:43,837 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:26:43" (1/1) ... [2023-08-04 08:26:43,838 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:26:43" (1/1) ... [2023-08-04 08:26:43,841 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 08:26:43,842 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 08:26:43,842 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 08:26:43,842 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 08:26:43,843 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:26:43" (1/1) ... [2023-08-04 08:26:43,848 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 08:26:43,862 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:26:43,883 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 08:26:43,904 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 08:26:43,914 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 08:26:43,914 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 08:26:43,915 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 08:26:43,915 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 08:26:43,915 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-04 08:26:43,915 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-04 08:26:43,915 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-04 08:26:43,915 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-04 08:26:43,915 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 08:26:43,915 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-04 08:26:43,916 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 08:26:43,916 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 08:26:43,916 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 08:26:43,917 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 08:26:44,059 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 08:26:44,061 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 08:26:44,480 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 08:26:44,490 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 08:26:44,490 INFO L302 CfgBuilder]: Removed 8 assume(true) statements. [2023-08-04 08:26:44,493 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 08:26:44 BoogieIcfgContainer [2023-08-04 08:26:44,493 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 08:26:44,495 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 08:26:44,495 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 08:26:44,498 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 08:26:44,498 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 08:26:43" (1/3) ... [2023-08-04 08:26:44,499 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d2e7ed1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 08:26:44, skipping insertion in model container [2023-08-04 08:26:44,499 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:26:43" (2/3) ... [2023-08-04 08:26:44,499 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d2e7ed1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 08:26:44, skipping insertion in model container [2023-08-04 08:26:44,499 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 08:26:44" (3/3) ... [2023-08-04 08:26:44,500 INFO L112 eAbstractionObserver]: Analyzing ICFG weaver_chl-node-symm.wvr_bound2.c [2023-08-04 08:26:44,512 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 08:26:44,521 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 08:26:44,522 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 08:26:44,522 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 08:26:44,625 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-04 08:26:44,672 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 342 places, 373 transitions, 768 flow [2023-08-04 08:26:44,836 INFO L124 PetriNetUnfolderBase]: 57/551 cut-off events. [2023-08-04 08:26:44,836 INFO L125 PetriNetUnfolderBase]: For 8/14 co-relation queries the response was YES. [2023-08-04 08:26:44,845 INFO L83 FinitePrefix]: Finished finitePrefix Result has 571 conditions, 551 events. 57/551 cut-off events. For 8/14 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1708 event pairs, 0 based on Foata normal form. 0/484 useless extension candidates. Maximal degree in co-relation 360. Up to 8 conditions per place. [2023-08-04 08:26:44,845 INFO L82 GeneralOperation]: Start removeDead. Operand has 342 places, 373 transitions, 768 flow [2023-08-04 08:26:44,875 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 342 places, 373 transitions, 768 flow [2023-08-04 08:26:44,879 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 08:26:44,893 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 342 places, 373 transitions, 768 flow [2023-08-04 08:26:44,897 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 342 places, 373 transitions, 768 flow [2023-08-04 08:26:44,898 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 342 places, 373 transitions, 768 flow [2023-08-04 08:26:45,003 INFO L124 PetriNetUnfolderBase]: 57/551 cut-off events. [2023-08-04 08:26:45,003 INFO L125 PetriNetUnfolderBase]: For 8/14 co-relation queries the response was YES. [2023-08-04 08:26:45,009 INFO L83 FinitePrefix]: Finished finitePrefix Result has 571 conditions, 551 events. 57/551 cut-off events. For 8/14 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1708 event pairs, 0 based on Foata normal form. 0/484 useless extension candidates. Maximal degree in co-relation 360. Up to 8 conditions per place. [2023-08-04 08:26:45,020 INFO L119 LiptonReduction]: Number of co-enabled transitions 15168 [2023-08-04 08:26:56,832 INFO L134 LiptonReduction]: Checked pairs total: 24013 [2023-08-04 08:26:56,833 INFO L136 LiptonReduction]: Total number of compositions: 417 [2023-08-04 08:26:56,844 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 08:26:56,849 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;@5bdc2670, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 08:26:56,849 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 08:26:56,854 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 08:26:56,854 INFO L124 PetriNetUnfolderBase]: 4/21 cut-off events. [2023-08-04 08:26:56,854 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 08:26:56,854 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:26:56,855 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:26:56,855 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:26:56,859 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:26:56,860 INFO L85 PathProgramCache]: Analyzing trace with hash 1265861346, now seen corresponding path program 1 times [2023-08-04 08:26:56,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:26:56,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805404490] [2023-08-04 08:26:56,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:26:56,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:26:57,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:26:57,248 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 08:26:57,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:26:57,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805404490] [2023-08-04 08:26:57,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805404490] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:26:57,250 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 08:26:57,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 08:26:57,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470735005] [2023-08-04 08:26:57,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:26:57,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:26:57,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:26:57,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:26:57,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 08:26:57,313 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 338 out of 790 [2023-08-04 08:26:57,320 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 50 transitions, 122 flow. Second operand has 3 states, 3 states have (on average 341.0) internal successors, (1023), 3 states have internal predecessors, (1023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:26:57,320 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:26:57,320 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 338 of 790 [2023-08-04 08:26:57,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:26:57,597 INFO L124 PetriNetUnfolderBase]: 1291/2025 cut-off events. [2023-08-04 08:26:57,597 INFO L125 PetriNetUnfolderBase]: For 60/60 co-relation queries the response was YES. [2023-08-04 08:26:57,600 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4075 conditions, 2025 events. 1291/2025 cut-off events. For 60/60 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 9224 event pairs, 441 based on Foata normal form. 0/1484 useless extension candidates. Maximal degree in co-relation 3720. Up to 1957 conditions per place. [2023-08-04 08:26:57,610 INFO L140 encePairwiseOnDemand]: 786/790 looper letters, 52 selfloop transitions, 2 changer transitions 3/59 dead transitions. [2023-08-04 08:26:57,610 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 59 transitions, 250 flow [2023-08-04 08:26:57,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:26:57,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:26:57,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1071 transitions. [2023-08-04 08:26:57,627 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4518987341772152 [2023-08-04 08:26:57,627 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1071 transitions. [2023-08-04 08:26:57,628 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1071 transitions. [2023-08-04 08:26:57,631 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:26:57,633 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1071 transitions. [2023-08-04 08:26:57,639 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 357.0) internal successors, (1071), 3 states have internal predecessors, (1071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:26:57,648 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 790.0) internal successors, (3160), 4 states have internal predecessors, (3160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:26:57,650 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 790.0) internal successors, (3160), 4 states have internal predecessors, (3160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:26:57,652 INFO L175 Difference]: Start difference. First operand has 43 places, 50 transitions, 122 flow. Second operand 3 states and 1071 transitions. [2023-08-04 08:26:57,652 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 59 transitions, 250 flow [2023-08-04 08:26:57,656 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 59 transitions, 250 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 08:26:57,658 INFO L231 Difference]: Finished difference. Result has 45 places, 47 transitions, 120 flow [2023-08-04 08:26:57,660 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=790, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=120, PETRI_PLACES=45, PETRI_TRANSITIONS=47} [2023-08-04 08:26:57,664 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 2 predicate places. [2023-08-04 08:26:57,664 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 47 transitions, 120 flow [2023-08-04 08:26:57,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 341.0) internal successors, (1023), 3 states have internal predecessors, (1023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:26:57,665 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:26:57,665 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:26:57,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 08:26:57,665 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:26:57,666 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:26:57,666 INFO L85 PathProgramCache]: Analyzing trace with hash -490517829, now seen corresponding path program 1 times [2023-08-04 08:26:57,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:26:57,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195080282] [2023-08-04 08:26:57,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:26:57,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:26:57,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:26:57,795 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 08:26:57,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:26:57,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195080282] [2023-08-04 08:26:57,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195080282] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:26:57,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310154041] [2023-08-04 08:26:57,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:26:57,796 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:26:57,796 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:26:57,799 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 08:26:57,803 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 08:26:57,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:26:57,900 INFO L262 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:26:57,904 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:26:57,919 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 08:26:57,919 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:26:57,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1310154041] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:26:57,920 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:26:57,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 08:26:57,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054848097] [2023-08-04 08:26:57,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:26:57,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:26:57,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:26:57,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:26:57,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:26:57,941 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 338 out of 790 [2023-08-04 08:26:57,942 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 47 transitions, 120 flow. Second operand has 3 states, 3 states have (on average 342.0) internal successors, (1026), 3 states have internal predecessors, (1026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:26:57,942 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:26:57,942 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 338 of 790 [2023-08-04 08:26:57,942 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:26:58,212 INFO L124 PetriNetUnfolderBase]: 1283/1994 cut-off events. [2023-08-04 08:26:58,212 INFO L125 PetriNetUnfolderBase]: For 51/51 co-relation queries the response was YES. [2023-08-04 08:26:58,215 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4039 conditions, 1994 events. 1283/1994 cut-off events. For 51/51 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 8977 event pairs, 456 based on Foata normal form. 0/1471 useless extension candidates. Maximal degree in co-relation 3958. Up to 1775 conditions per place. [2023-08-04 08:26:58,233 INFO L140 encePairwiseOnDemand]: 787/790 looper letters, 61 selfloop transitions, 2 changer transitions 1/66 dead transitions. [2023-08-04 08:26:58,233 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 66 transitions, 286 flow [2023-08-04 08:26:58,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:26:58,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:26:58,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1079 transitions. [2023-08-04 08:26:58,237 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45527426160337553 [2023-08-04 08:26:58,237 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1079 transitions. [2023-08-04 08:26:58,237 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1079 transitions. [2023-08-04 08:26:58,237 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:26:58,238 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1079 transitions. [2023-08-04 08:26:58,240 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 359.6666666666667) internal successors, (1079), 3 states have internal predecessors, (1079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:26:58,244 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 790.0) internal successors, (3160), 4 states have internal predecessors, (3160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:26:58,246 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 790.0) internal successors, (3160), 4 states have internal predecessors, (3160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:26:58,246 INFO L175 Difference]: Start difference. First operand has 45 places, 47 transitions, 120 flow. Second operand 3 states and 1079 transitions. [2023-08-04 08:26:58,246 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 66 transitions, 286 flow [2023-08-04 08:26:58,248 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 66 transitions, 276 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-04 08:26:58,249 INFO L231 Difference]: Finished difference. Result has 42 places, 47 transitions, 118 flow [2023-08-04 08:26:58,249 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=790, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=118, PETRI_PLACES=42, PETRI_TRANSITIONS=47} [2023-08-04 08:26:58,250 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, -1 predicate places. [2023-08-04 08:26:58,250 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 47 transitions, 118 flow [2023-08-04 08:26:58,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 342.0) internal successors, (1026), 3 states have internal predecessors, (1026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:26:58,251 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:26:58,251 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:26:58,269 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 08:26:58,469 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 08:26:58,470 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:26:58,470 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:26:58,470 INFO L85 PathProgramCache]: Analyzing trace with hash -1670414678, now seen corresponding path program 1 times [2023-08-04 08:26:58,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:26:58,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114574250] [2023-08-04 08:26:58,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:26:58,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:26:58,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:26:58,593 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 08:26:58,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:26:58,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114574250] [2023-08-04 08:26:58,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114574250] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:26:58,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476914359] [2023-08-04 08:26:58,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:26:58,597 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:26:58,597 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:26:58,601 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 08:26:58,621 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 08:26:58,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:26:58,708 INFO L262 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:26:58,711 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:26:58,719 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 08:26:58,719 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:26:58,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [476914359] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:26:58,720 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:26:58,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 08:26:58,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517977631] [2023-08-04 08:26:58,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:26:58,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:26:58,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:26:58,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:26:58,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:26:58,731 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 338 out of 790 [2023-08-04 08:26:58,733 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 47 transitions, 118 flow. Second operand has 3 states, 3 states have (on average 343.0) internal successors, (1029), 3 states have internal predecessors, (1029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:26:58,733 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:26:58,733 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 338 of 790 [2023-08-04 08:26:58,733 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:26:58,921 INFO L124 PetriNetUnfolderBase]: 817/1304 cut-off events. [2023-08-04 08:26:58,922 INFO L125 PetriNetUnfolderBase]: For 164/164 co-relation queries the response was YES. [2023-08-04 08:26:58,923 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2842 conditions, 1304 events. 817/1304 cut-off events. For 164/164 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 5215 event pairs, 378 based on Foata normal form. 0/1073 useless extension candidates. Maximal degree in co-relation 2393. Up to 837 conditions per place. [2023-08-04 08:26:58,928 INFO L140 encePairwiseOnDemand]: 787/790 looper letters, 65 selfloop transitions, 2 changer transitions 0/69 dead transitions. [2023-08-04 08:26:58,928 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 69 transitions, 300 flow [2023-08-04 08:26:58,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:26:58,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:26:58,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1082 transitions. [2023-08-04 08:26:58,931 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45654008438818566 [2023-08-04 08:26:58,932 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1082 transitions. [2023-08-04 08:26:58,932 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1082 transitions. [2023-08-04 08:26:58,932 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:26:58,932 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1082 transitions. [2023-08-04 08:26:58,935 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 360.6666666666667) internal successors, (1082), 3 states have internal predecessors, (1082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:26:58,939 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 790.0) internal successors, (3160), 4 states have internal predecessors, (3160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:26:58,940 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 790.0) internal successors, (3160), 4 states have internal predecessors, (3160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:26:58,940 INFO L175 Difference]: Start difference. First operand has 42 places, 47 transitions, 118 flow. Second operand 3 states and 1082 transitions. [2023-08-04 08:26:58,940 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 69 transitions, 300 flow [2023-08-04 08:26:58,941 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 69 transitions, 296 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 08:26:58,943 INFO L231 Difference]: Finished difference. Result has 43 places, 48 transitions, 126 flow [2023-08-04 08:26:58,943 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=790, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=126, PETRI_PLACES=43, PETRI_TRANSITIONS=48} [2023-08-04 08:26:58,943 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 0 predicate places. [2023-08-04 08:26:58,943 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 48 transitions, 126 flow [2023-08-04 08:26:58,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 343.0) internal successors, (1029), 3 states have internal predecessors, (1029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:26:58,944 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:26:58,944 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 08:26:58,953 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 08:26:59,150 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 08:26:59,151 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:26:59,151 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:26:59,151 INFO L85 PathProgramCache]: Analyzing trace with hash -487450106, now seen corresponding path program 1 times [2023-08-04 08:26:59,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:26:59,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208185772] [2023-08-04 08:26:59,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:26:59,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:26:59,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:26:59,221 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 08:26:59,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:26:59,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208185772] [2023-08-04 08:26:59,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208185772] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:26:59,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450650758] [2023-08-04 08:26:59,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:26:59,222 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:26:59,222 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:26:59,223 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 08:26:59,242 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 08:26:59,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:26:59,333 INFO L262 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:26:59,335 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:26:59,342 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 08:26:59,342 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:26:59,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [450650758] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:26:59,343 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:26:59,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 08:26:59,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519955912] [2023-08-04 08:26:59,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:26:59,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:26:59,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:26:59,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:26:59,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:26:59,352 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 335 out of 790 [2023-08-04 08:26:59,353 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 48 transitions, 126 flow. Second operand has 3 states, 3 states have (on average 342.3333333333333) internal successors, (1027), 3 states have internal predecessors, (1027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:26:59,354 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:26:59,354 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 335 of 790 [2023-08-04 08:26:59,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:26:59,536 INFO L124 PetriNetUnfolderBase]: 905/1441 cut-off events. [2023-08-04 08:26:59,536 INFO L125 PetriNetUnfolderBase]: For 439/439 co-relation queries the response was YES. [2023-08-04 08:26:59,538 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3192 conditions, 1441 events. 905/1441 cut-off events. For 439/439 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 5956 event pairs, 461 based on Foata normal form. 0/1216 useless extension candidates. Maximal degree in co-relation 2733. Up to 958 conditions per place. [2023-08-04 08:26:59,543 INFO L140 encePairwiseOnDemand]: 786/790 looper letters, 65 selfloop transitions, 3 changer transitions 1/71 dead transitions. [2023-08-04 08:26:59,544 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 71 transitions, 329 flow [2023-08-04 08:26:59,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:26:59,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:26:59,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1074 transitions. [2023-08-04 08:26:59,547 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4531645569620253 [2023-08-04 08:26:59,547 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1074 transitions. [2023-08-04 08:26:59,547 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1074 transitions. [2023-08-04 08:26:59,548 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:26:59,548 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1074 transitions. [2023-08-04 08:26:59,550 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 358.0) internal successors, (1074), 3 states have internal predecessors, (1074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:26:59,554 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 790.0) internal successors, (3160), 4 states have internal predecessors, (3160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:26:59,556 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 790.0) internal successors, (3160), 4 states have internal predecessors, (3160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:26:59,556 INFO L175 Difference]: Start difference. First operand has 43 places, 48 transitions, 126 flow. Second operand 3 states and 1074 transitions. [2023-08-04 08:26:59,556 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 71 transitions, 329 flow [2023-08-04 08:26:59,558 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 71 transitions, 325 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:26:59,559 INFO L231 Difference]: Finished difference. Result has 46 places, 49 transitions, 142 flow [2023-08-04 08:26:59,559 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=790, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=142, PETRI_PLACES=46, PETRI_TRANSITIONS=49} [2023-08-04 08:26:59,560 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 3 predicate places. [2023-08-04 08:26:59,560 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 49 transitions, 142 flow [2023-08-04 08:26:59,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 342.3333333333333) internal successors, (1027), 3 states have internal predecessors, (1027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:26:59,561 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:26:59,561 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 08:26:59,567 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 08:26:59,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:26:59,768 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:26:59,769 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:26:59,769 INFO L85 PathProgramCache]: Analyzing trace with hash 444836670, now seen corresponding path program 1 times [2023-08-04 08:26:59,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:26:59,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101654615] [2023-08-04 08:26:59,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:26:59,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:26:59,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:26:59,856 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 08:26:59,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:26:59,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101654615] [2023-08-04 08:26:59,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101654615] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:26:59,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028472547] [2023-08-04 08:26:59,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:26:59,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:26:59,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:26:59,862 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 08:26:59,864 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 08:26:59,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:26:59,969 INFO L262 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:26:59,971 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:26:59,981 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 08:26:59,982 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:26:59,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1028472547] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:26:59,982 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:26:59,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 08:26:59,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212670287] [2023-08-04 08:26:59,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:26:59,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:26:59,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:26:59,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:26:59,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:26:59,991 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 335 out of 790 [2023-08-04 08:26:59,993 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 49 transitions, 142 flow. Second operand has 3 states, 3 states have (on average 342.3333333333333) internal successors, (1027), 3 states have internal predecessors, (1027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:26:59,993 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:26:59,993 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 335 of 790 [2023-08-04 08:26:59,993 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:27:00,200 INFO L124 PetriNetUnfolderBase]: 997/1585 cut-off events. [2023-08-04 08:27:00,200 INFO L125 PetriNetUnfolderBase]: For 821/821 co-relation queries the response was YES. [2023-08-04 08:27:00,202 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3941 conditions, 1585 events. 997/1585 cut-off events. For 821/821 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 6407 event pairs, 531 based on Foata normal form. 0/1461 useless extension candidates. Maximal degree in co-relation 3427. Up to 1089 conditions per place. [2023-08-04 08:27:00,208 INFO L140 encePairwiseOnDemand]: 786/790 looper letters, 63 selfloop transitions, 3 changer transitions 1/69 dead transitions. [2023-08-04 08:27:00,208 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 69 transitions, 343 flow [2023-08-04 08:27:00,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:27:00,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:27:00,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1070 transitions. [2023-08-04 08:27:00,211 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45147679324894513 [2023-08-04 08:27:00,211 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1070 transitions. [2023-08-04 08:27:00,212 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1070 transitions. [2023-08-04 08:27:00,212 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:27:00,212 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1070 transitions. [2023-08-04 08:27:00,215 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 356.6666666666667) internal successors, (1070), 3 states have internal predecessors, (1070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:27:00,219 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 790.0) internal successors, (3160), 4 states have internal predecessors, (3160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:27:00,220 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 790.0) internal successors, (3160), 4 states have internal predecessors, (3160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:27:00,220 INFO L175 Difference]: Start difference. First operand has 46 places, 49 transitions, 142 flow. Second operand 3 states and 1070 transitions. [2023-08-04 08:27:00,220 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 69 transitions, 343 flow [2023-08-04 08:27:00,225 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 69 transitions, 331 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 08:27:00,227 INFO L231 Difference]: Finished difference. Result has 48 places, 50 transitions, 154 flow [2023-08-04 08:27:00,227 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=790, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=154, PETRI_PLACES=48, PETRI_TRANSITIONS=50} [2023-08-04 08:27:00,230 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 5 predicate places. [2023-08-04 08:27:00,230 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 50 transitions, 154 flow [2023-08-04 08:27:00,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 342.3333333333333) internal successors, (1027), 3 states have internal predecessors, (1027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:27:00,231 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:27:00,231 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:27:00,239 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 08:27:00,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:27:00,437 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:27:00,438 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:27:00,438 INFO L85 PathProgramCache]: Analyzing trace with hash 855121597, now seen corresponding path program 1 times [2023-08-04 08:27:00,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:27:00,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411615615] [2023-08-04 08:27:00,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:27:00,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:27:00,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:27:00,503 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 08:27:00,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:27:00,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411615615] [2023-08-04 08:27:00,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411615615] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:27:00,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016987984] [2023-08-04 08:27:00,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:27:00,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:27:00,504 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:27:00,505 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 08:27:00,507 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 08:27:00,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:27:00,613 INFO L262 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:27:00,614 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:27:00,621 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 08:27:00,621 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:27:00,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1016987984] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:27:00,621 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:27:00,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-08-04 08:27:00,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776733692] [2023-08-04 08:27:00,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:27:00,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:27:00,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:27:00,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:27:00,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:27:00,632 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 338 out of 790 [2023-08-04 08:27:00,633 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 50 transitions, 154 flow. Second operand has 3 states, 3 states have (on average 345.6666666666667) internal successors, (1037), 3 states have internal predecessors, (1037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:27:00,633 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:27:00,633 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 338 of 790 [2023-08-04 08:27:00,633 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:27:00,820 INFO L124 PetriNetUnfolderBase]: 976/1551 cut-off events. [2023-08-04 08:27:00,821 INFO L125 PetriNetUnfolderBase]: For 683/683 co-relation queries the response was YES. [2023-08-04 08:27:00,823 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4098 conditions, 1551 events. 976/1551 cut-off events. For 683/683 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 6193 event pairs, 729 based on Foata normal form. 0/1492 useless extension candidates. Maximal degree in co-relation 3556. Up to 1452 conditions per place. [2023-08-04 08:27:00,829 INFO L140 encePairwiseOnDemand]: 787/790 looper letters, 65 selfloop transitions, 2 changer transitions 2/71 dead transitions. [2023-08-04 08:27:00,829 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 71 transitions, 360 flow [2023-08-04 08:27:00,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:27:00,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:27:00,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1079 transitions. [2023-08-04 08:27:00,833 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45527426160337553 [2023-08-04 08:27:00,833 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1079 transitions. [2023-08-04 08:27:00,833 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1079 transitions. [2023-08-04 08:27:00,833 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:27:00,833 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1079 transitions. [2023-08-04 08:27:00,836 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 359.6666666666667) internal successors, (1079), 3 states have internal predecessors, (1079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:27:00,839 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 790.0) internal successors, (3160), 4 states have internal predecessors, (3160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:27:00,841 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 790.0) internal successors, (3160), 4 states have internal predecessors, (3160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:27:00,841 INFO L175 Difference]: Start difference. First operand has 48 places, 50 transitions, 154 flow. Second operand 3 states and 1079 transitions. [2023-08-04 08:27:00,841 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 71 transitions, 360 flow [2023-08-04 08:27:00,846 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 71 transitions, 348 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 08:27:00,847 INFO L231 Difference]: Finished difference. Result has 49 places, 49 transitions, 152 flow [2023-08-04 08:27:00,847 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=790, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=152, PETRI_PLACES=49, PETRI_TRANSITIONS=49} [2023-08-04 08:27:00,848 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 6 predicate places. [2023-08-04 08:27:00,848 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 49 transitions, 152 flow [2023-08-04 08:27:00,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 345.6666666666667) internal successors, (1037), 3 states have internal predecessors, (1037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:27:00,849 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:27:00,849 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:27:00,857 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 08:27:01,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:27:01,055 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:27:01,056 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:27:01,056 INFO L85 PathProgramCache]: Analyzing trace with hash 20567999, now seen corresponding path program 1 times [2023-08-04 08:27:01,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:27:01,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275723803] [2023-08-04 08:27:01,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:27:01,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:27:01,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:27:01,130 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 08:27:01,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:27:01,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275723803] [2023-08-04 08:27:01,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275723803] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:27:01,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475236259] [2023-08-04 08:27:01,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:27:01,132 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:27:01,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:27:01,134 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 08:27:01,151 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 08:27:01,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:27:01,261 INFO L262 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-04 08:27:01,262 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:27:01,291 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 08:27:01,291 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:27:01,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1475236259] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:27:01,291 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:27:01,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-08-04 08:27:01,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895938127] [2023-08-04 08:27:01,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:27:01,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:27:01,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:27:01,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:27:01,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:27:01,321 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 334 out of 790 [2023-08-04 08:27:01,322 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 49 transitions, 152 flow. Second operand has 3 states, 3 states have (on average 344.3333333333333) internal successors, (1033), 3 states have internal predecessors, (1033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:27:01,322 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:27:01,322 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 334 of 790 [2023-08-04 08:27:01,323 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:27:01,520 INFO L124 PetriNetUnfolderBase]: 976/1548 cut-off events. [2023-08-04 08:27:01,520 INFO L125 PetriNetUnfolderBase]: For 513/513 co-relation queries the response was YES. [2023-08-04 08:27:01,522 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3962 conditions, 1548 events. 976/1548 cut-off events. For 513/513 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 6183 event pairs, 761 based on Foata normal form. 0/1440 useless extension candidates. Maximal degree in co-relation 3727. Up to 1528 conditions per place. [2023-08-04 08:27:01,527 INFO L140 encePairwiseOnDemand]: 787/790 looper letters, 46 selfloop transitions, 2 changer transitions 0/50 dead transitions. [2023-08-04 08:27:01,527 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 50 transitions, 250 flow [2023-08-04 08:27:01,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:27:01,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:27:01,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1049 transitions. [2023-08-04 08:27:01,530 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44261603375527425 [2023-08-04 08:27:01,530 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1049 transitions. [2023-08-04 08:27:01,530 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1049 transitions. [2023-08-04 08:27:01,531 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:27:01,531 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1049 transitions. [2023-08-04 08:27:01,533 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 349.6666666666667) internal successors, (1049), 3 states have internal predecessors, (1049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:27:01,536 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 790.0) internal successors, (3160), 4 states have internal predecessors, (3160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:27:01,537 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 790.0) internal successors, (3160), 4 states have internal predecessors, (3160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:27:01,537 INFO L175 Difference]: Start difference. First operand has 49 places, 49 transitions, 152 flow. Second operand 3 states and 1049 transitions. [2023-08-04 08:27:01,537 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 50 transitions, 250 flow [2023-08-04 08:27:01,541 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 50 transitions, 246 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 08:27:01,542 INFO L231 Difference]: Finished difference. Result has 50 places, 50 transitions, 160 flow [2023-08-04 08:27:01,542 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=790, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=160, PETRI_PLACES=50, PETRI_TRANSITIONS=50} [2023-08-04 08:27:01,542 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 7 predicate places. [2023-08-04 08:27:01,542 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 50 transitions, 160 flow [2023-08-04 08:27:01,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 344.3333333333333) internal successors, (1033), 3 states have internal predecessors, (1033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:27:01,543 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:27:01,543 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:27:01,555 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 08:27:01,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:27:01,750 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:27:01,750 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:27:01,751 INFO L85 PathProgramCache]: Analyzing trace with hash -631076146, now seen corresponding path program 1 times [2023-08-04 08:27:01,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:27:01,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468646877] [2023-08-04 08:27:01,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:27:01,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:27:01,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:27:01,825 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 08:27:01,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:27:01,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468646877] [2023-08-04 08:27:01,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468646877] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:27:01,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506800176] [2023-08-04 08:27:01,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:27:01,826 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:27:01,826 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:27:01,827 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 08:27:01,830 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 08:27:01,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:27:01,947 INFO L262 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-04 08:27:01,949 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:27:01,974 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 08:27:01,974 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:27:01,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [506800176] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:27:01,974 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:27:01,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2023-08-04 08:27:01,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316520125] [2023-08-04 08:27:01,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:27:01,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 08:27:01,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:27:01,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 08:27:01,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-08-04 08:27:02,036 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 332 out of 790 [2023-08-04 08:27:02,037 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 50 transitions, 160 flow. Second operand has 4 states, 4 states have (on average 340.0) internal successors, (1360), 4 states have internal predecessors, (1360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:27:02,037 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:27:02,037 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 332 of 790 [2023-08-04 08:27:02,037 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:27:02,227 INFO L124 PetriNetUnfolderBase]: 976/1549 cut-off events. [2023-08-04 08:27:02,228 INFO L125 PetriNetUnfolderBase]: For 494/494 co-relation queries the response was YES. [2023-08-04 08:27:02,231 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3951 conditions, 1549 events. 976/1549 cut-off events. For 494/494 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 6179 event pairs, 761 based on Foata normal form. 0/1441 useless extension candidates. Maximal degree in co-relation 3932. Up to 1527 conditions per place. [2023-08-04 08:27:02,236 INFO L140 encePairwiseOnDemand]: 785/790 looper letters, 45 selfloop transitions, 4 changer transitions 0/51 dead transitions. [2023-08-04 08:27:02,236 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 51 transitions, 260 flow [2023-08-04 08:27:02,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 08:27:02,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 08:27:02,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1376 transitions. [2023-08-04 08:27:02,241 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43544303797468353 [2023-08-04 08:27:02,242 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1376 transitions. [2023-08-04 08:27:02,242 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1376 transitions. [2023-08-04 08:27:02,244 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:27:02,244 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1376 transitions. [2023-08-04 08:27:02,246 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 344.0) internal successors, (1376), 4 states have internal predecessors, (1376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:27:02,250 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 790.0) internal successors, (3950), 5 states have internal predecessors, (3950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:27:02,251 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 790.0) internal successors, (3950), 5 states have internal predecessors, (3950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:27:02,251 INFO L175 Difference]: Start difference. First operand has 50 places, 50 transitions, 160 flow. Second operand 4 states and 1376 transitions. [2023-08-04 08:27:02,251 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 51 transitions, 260 flow [2023-08-04 08:27:02,254 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 51 transitions, 256 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-04 08:27:02,255 INFO L231 Difference]: Finished difference. Result has 53 places, 51 transitions, 174 flow [2023-08-04 08:27:02,255 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=790, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=174, PETRI_PLACES=53, PETRI_TRANSITIONS=51} [2023-08-04 08:27:02,257 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 10 predicate places. [2023-08-04 08:27:02,257 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 51 transitions, 174 flow [2023-08-04 08:27:02,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 340.0) internal successors, (1360), 4 states have internal predecessors, (1360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:27:02,258 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:27:02,258 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:27:02,267 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-04 08:27:02,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:27:02,467 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:27:02,467 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:27:02,468 INFO L85 PathProgramCache]: Analyzing trace with hash 2144643242, now seen corresponding path program 1 times [2023-08-04 08:27:02,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:27:02,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059563887] [2023-08-04 08:27:02,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:27:02,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:27:02,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:27:02,530 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 08:27:02,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:27:02,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059563887] [2023-08-04 08:27:02,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059563887] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:27:02,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100454083] [2023-08-04 08:27:02,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:27:02,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:27:02,531 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:27:02,532 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 08:27:02,555 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 08:27:02,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:27:02,674 INFO L262 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-04 08:27:02,679 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:27:02,705 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 08:27:02,705 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:27:02,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2100454083] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:27:02,705 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:27:02,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2023-08-04 08:27:02,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924108614] [2023-08-04 08:27:02,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:27:02,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 08:27:02,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:27:02,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 08:27:02,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-08-04 08:27:02,756 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 332 out of 790 [2023-08-04 08:27:02,758 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 51 transitions, 174 flow. Second operand has 4 states, 4 states have (on average 340.25) internal successors, (1361), 4 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 08:27:02,758 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:27:02,758 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 332 of 790 [2023-08-04 08:27:02,758 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:27:02,972 INFO L124 PetriNetUnfolderBase]: 976/1550 cut-off events. [2023-08-04 08:27:02,972 INFO L125 PetriNetUnfolderBase]: For 494/494 co-relation queries the response was YES. [2023-08-04 08:27:02,975 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3960 conditions, 1550 events. 976/1550 cut-off events. For 494/494 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 6179 event pairs, 761 based on Foata normal form. 0/1443 useless extension candidates. Maximal degree in co-relation 3932. Up to 1529 conditions per place. [2023-08-04 08:27:02,980 INFO L140 encePairwiseOnDemand]: 786/790 looper letters, 47 selfloop transitions, 3 changer transitions 0/52 dead transitions. [2023-08-04 08:27:02,980 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 52 transitions, 276 flow [2023-08-04 08:27:02,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 08:27:02,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 08:27:02,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1375 transitions. [2023-08-04 08:27:02,984 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.435126582278481 [2023-08-04 08:27:02,984 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1375 transitions. [2023-08-04 08:27:02,984 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1375 transitions. [2023-08-04 08:27:02,985 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:27:02,985 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1375 transitions. [2023-08-04 08:27:02,988 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 343.75) internal successors, (1375), 4 states have internal predecessors, (1375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:27:02,992 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 790.0) internal successors, (3950), 5 states have internal predecessors, (3950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:27:02,993 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 790.0) internal successors, (3950), 5 states have internal predecessors, (3950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:27:02,993 INFO L175 Difference]: Start difference. First operand has 53 places, 51 transitions, 174 flow. Second operand 4 states and 1375 transitions. [2023-08-04 08:27:02,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 52 transitions, 276 flow [2023-08-04 08:27:02,996 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 52 transitions, 275 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:27:02,997 INFO L231 Difference]: Finished difference. Result has 56 places, 52 transitions, 187 flow [2023-08-04 08:27:02,998 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=790, PETRI_DIFFERENCE_MINUEND_FLOW=173, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=187, PETRI_PLACES=56, PETRI_TRANSITIONS=52} [2023-08-04 08:27:02,998 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 13 predicate places. [2023-08-04 08:27:02,998 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 52 transitions, 187 flow [2023-08-04 08:27:02,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 340.25) internal successors, (1361), 4 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 08:27:02,999 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:27:02,999 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:27:03,011 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 08:27:03,211 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,SelfDestructingSolverStorable8 [2023-08-04 08:27:03,211 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:27:03,212 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:27:03,212 INFO L85 PathProgramCache]: Analyzing trace with hash -1053175862, now seen corresponding path program 1 times [2023-08-04 08:27:03,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:27:03,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182164552] [2023-08-04 08:27:03,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:27:03,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:27:03,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:27:03,278 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 08:27:03,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:27:03,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182164552] [2023-08-04 08:27:03,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182164552] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:27:03,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971926847] [2023-08-04 08:27:03,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:27:03,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:27:03,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:27:03,280 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 08:27:03,289 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 08:27:03,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:27:03,405 INFO L262 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-04 08:27:03,406 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:27:03,431 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-04 08:27:03,432 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:27:03,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [971926847] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:27:03,432 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:27:03,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2023-08-04 08:27:03,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489878166] [2023-08-04 08:27:03,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:27:03,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 08:27:03,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:27:03,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 08:27:03,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-08-04 08:27:03,486 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 332 out of 790 [2023-08-04 08:27:03,488 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 52 transitions, 187 flow. Second operand has 4 states, 4 states have (on average 340.5) internal successors, (1362), 4 states have internal predecessors, (1362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:27:03,488 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:27:03,488 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 332 of 790 [2023-08-04 08:27:03,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:27:03,683 INFO L124 PetriNetUnfolderBase]: 976/1551 cut-off events. [2023-08-04 08:27:03,683 INFO L125 PetriNetUnfolderBase]: For 495/495 co-relation queries the response was YES. [2023-08-04 08:27:03,686 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3969 conditions, 1551 events. 976/1551 cut-off events. For 495/495 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 6179 event pairs, 761 based on Foata normal form. 1/1446 useless extension candidates. Maximal degree in co-relation 3939. Up to 1530 conditions per place. [2023-08-04 08:27:03,692 INFO L140 encePairwiseOnDemand]: 786/790 looper letters, 48 selfloop transitions, 3 changer transitions 0/53 dead transitions. [2023-08-04 08:27:03,692 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 53 transitions, 291 flow [2023-08-04 08:27:03,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 08:27:03,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 08:27:03,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1375 transitions. [2023-08-04 08:27:03,697 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.435126582278481 [2023-08-04 08:27:03,697 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1375 transitions. [2023-08-04 08:27:03,697 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1375 transitions. [2023-08-04 08:27:03,697 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:27:03,697 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1375 transitions. [2023-08-04 08:27:03,700 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 343.75) internal successors, (1375), 4 states have internal predecessors, (1375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:27:03,704 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 790.0) internal successors, (3950), 5 states have internal predecessors, (3950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:27:03,705 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 790.0) internal successors, (3950), 5 states have internal predecessors, (3950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:27:03,705 INFO L175 Difference]: Start difference. First operand has 56 places, 52 transitions, 187 flow. Second operand 4 states and 1375 transitions. [2023-08-04 08:27:03,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 53 transitions, 291 flow [2023-08-04 08:27:03,709 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 53 transitions, 285 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-04 08:27:03,710 INFO L231 Difference]: Finished difference. Result has 58 places, 53 transitions, 195 flow [2023-08-04 08:27:03,711 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=790, PETRI_DIFFERENCE_MINUEND_FLOW=181, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=195, PETRI_PLACES=58, PETRI_TRANSITIONS=53} [2023-08-04 08:27:03,711 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 15 predicate places. [2023-08-04 08:27:03,711 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 53 transitions, 195 flow [2023-08-04 08:27:03,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 340.5) internal successors, (1362), 4 states have internal predecessors, (1362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:27:03,712 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:27:03,712 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:27:03,721 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 08:27:03,918 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,SelfDestructingSolverStorable9 [2023-08-04 08:27:03,919 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:27:03,919 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:27:03,919 INFO L85 PathProgramCache]: Analyzing trace with hash -1189296462, now seen corresponding path program 1 times [2023-08-04 08:27:03,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:27:03,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951092430] [2023-08-04 08:27:03,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:27:03,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:27:03,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:27:03,992 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-04 08:27:03,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:27:03,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951092430] [2023-08-04 08:27:03,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951092430] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:27:03,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678718185] [2023-08-04 08:27:03,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:27:03,993 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:27:03,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:27:03,994 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 08:27:04,004 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 08:27:04,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:27:04,129 INFO L262 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 08:27:04,131 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:27:04,141 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-04 08:27:04,141 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:27:04,157 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-04 08:27:04,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1678718185] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:27:04,157 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:27:04,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 08:27:04,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889233137] [2023-08-04 08:27:04,158 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:27:04,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 08:27:04,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:27:04,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 08:27:04,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:27:04,171 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 337 out of 790 [2023-08-04 08:27:04,172 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 53 transitions, 195 flow. Second operand has 5 states, 5 states have (on average 344.8) internal successors, (1724), 5 states have internal predecessors, (1724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:27:04,172 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:27:04,172 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 337 of 790 [2023-08-04 08:27:04,172 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:27:04,217 INFO L124 PetriNetUnfolderBase]: 26/63 cut-off events. [2023-08-04 08:27:04,217 INFO L125 PetriNetUnfolderBase]: For 11/11 co-relation queries the response was YES. [2023-08-04 08:27:04,217 INFO L83 FinitePrefix]: Finished finitePrefix Result has 186 conditions, 63 events. 26/63 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 133 event pairs, 0 based on Foata normal form. 9/69 useless extension candidates. Maximal degree in co-relation 171. Up to 38 conditions per place. [2023-08-04 08:27:04,218 INFO L140 encePairwiseOnDemand]: 787/790 looper letters, 0 selfloop transitions, 0 changer transitions 37/37 dead transitions. [2023-08-04 08:27:04,218 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 37 transitions, 211 flow [2023-08-04 08:27:04,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 08:27:04,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 08:27:04,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1380 transitions. [2023-08-04 08:27:04,221 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43670886075949367 [2023-08-04 08:27:04,221 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1380 transitions. [2023-08-04 08:27:04,222 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1380 transitions. [2023-08-04 08:27:04,222 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:27:04,222 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1380 transitions. [2023-08-04 08:27:04,225 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 345.0) internal successors, (1380), 4 states have internal predecessors, (1380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:27:04,229 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 790.0) internal successors, (3950), 5 states have internal predecessors, (3950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:27:04,230 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 790.0) internal successors, (3950), 5 states have internal predecessors, (3950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:27:04,230 INFO L175 Difference]: Start difference. First operand has 58 places, 53 transitions, 195 flow. Second operand 4 states and 1380 transitions. [2023-08-04 08:27:04,230 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 37 transitions, 211 flow [2023-08-04 08:27:04,231 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 37 transitions, 203 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-04 08:27:04,231 INFO L231 Difference]: Finished difference. Result has 36 places, 0 transitions, 0 flow [2023-08-04 08:27:04,231 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=790, PETRI_DIFFERENCE_MINUEND_FLOW=97, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=36, PETRI_TRANSITIONS=0} [2023-08-04 08:27:04,232 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, -7 predicate places. [2023-08-04 08:27:04,232 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 0 transitions, 0 flow [2023-08-04 08:27:04,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 344.8) internal successors, (1724), 5 states have internal predecessors, (1724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:27:04,234 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-04 08:27:04,245 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 08:27:04,441 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,SelfDestructingSolverStorable10 [2023-08-04 08:27:04,441 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:27:04,443 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-04 08:27:04,447 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 342 places, 373 transitions, 768 flow [2023-08-04 08:27:04,505 INFO L124 PetriNetUnfolderBase]: 57/551 cut-off events. [2023-08-04 08:27:04,505 INFO L125 PetriNetUnfolderBase]: For 8/14 co-relation queries the response was YES. [2023-08-04 08:27:04,508 INFO L83 FinitePrefix]: Finished finitePrefix Result has 571 conditions, 551 events. 57/551 cut-off events. For 8/14 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1708 event pairs, 0 based on Foata normal form. 0/484 useless extension candidates. Maximal degree in co-relation 360. Up to 8 conditions per place. [2023-08-04 08:27:04,508 INFO L82 GeneralOperation]: Start removeDead. Operand has 342 places, 373 transitions, 768 flow [2023-08-04 08:27:04,511 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 342 places, 373 transitions, 768 flow [2023-08-04 08:27:04,511 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 08:27:04,511 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 342 places, 373 transitions, 768 flow [2023-08-04 08:27:04,511 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 342 places, 373 transitions, 768 flow [2023-08-04 08:27:04,511 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 342 places, 373 transitions, 768 flow [2023-08-04 08:27:04,590 INFO L124 PetriNetUnfolderBase]: 57/551 cut-off events. [2023-08-04 08:27:04,590 INFO L125 PetriNetUnfolderBase]: For 8/14 co-relation queries the response was YES. [2023-08-04 08:27:04,592 INFO L83 FinitePrefix]: Finished finitePrefix Result has 571 conditions, 551 events. 57/551 cut-off events. For 8/14 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1708 event pairs, 0 based on Foata normal form. 0/484 useless extension candidates. Maximal degree in co-relation 360. Up to 8 conditions per place. [2023-08-04 08:27:04,601 INFO L119 LiptonReduction]: Number of co-enabled transitions 15168 [2023-08-04 08:27:14,624 INFO L134 LiptonReduction]: Checked pairs total: 22502 [2023-08-04 08:27:14,625 INFO L136 LiptonReduction]: Total number of compositions: 418 [2023-08-04 08:27:14,626 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 08:27:14,626 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;@5bdc2670, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 08:27:14,626 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-04 08:27:14,630 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 08:27:14,630 INFO L124 PetriNetUnfolderBase]: 5/35 cut-off events. [2023-08-04 08:27:14,630 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 08:27:14,630 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:27:14,630 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:27:14,631 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 08:27:14,631 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:27:14,631 INFO L85 PathProgramCache]: Analyzing trace with hash 1101592989, now seen corresponding path program 1 times [2023-08-04 08:27:14,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:27:14,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459193151] [2023-08-04 08:27:14,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:27:14,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:27:14,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:27:14,694 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 08:27:14,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:27:14,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459193151] [2023-08-04 08:27:14,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459193151] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:27:14,694 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 08:27:14,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 08:27:14,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111195670] [2023-08-04 08:27:14,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:27:14,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:27:14,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:27:14,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:27:14,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 08:27:14,721 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 334 out of 791 [2023-08-04 08:27:14,722 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 50 transitions, 122 flow. Second operand has 3 states, 3 states have (on average 336.6666666666667) internal successors, (1010), 3 states have internal predecessors, (1010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:27:14,722 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:27:14,722 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 334 of 791 [2023-08-04 08:27:14,722 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:27:14,920 INFO L124 PetriNetUnfolderBase]: 1320/2065 cut-off events. [2023-08-04 08:27:14,920 INFO L125 PetriNetUnfolderBase]: For 59/59 co-relation queries the response was YES. [2023-08-04 08:27:14,923 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4156 conditions, 2065 events. 1320/2065 cut-off events. For 59/59 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 9102 event pairs, 980 based on Foata normal form. 0/1509 useless extension candidates. Maximal degree in co-relation 3696. Up to 2024 conditions per place. [2023-08-04 08:27:14,927 INFO L140 encePairwiseOnDemand]: 787/791 looper letters, 33 selfloop transitions, 2 changer transitions 13/50 dead transitions. [2023-08-04 08:27:14,928 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 50 transitions, 214 flow [2023-08-04 08:27:14,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:27:14,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:27:14,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1050 transitions. [2023-08-04 08:27:14,931 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4424778761061947 [2023-08-04 08:27:14,931 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1050 transitions. [2023-08-04 08:27:14,931 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1050 transitions. [2023-08-04 08:27:14,932 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:27:14,932 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1050 transitions. [2023-08-04 08:27:14,934 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 350.0) internal successors, (1050), 3 states have internal predecessors, (1050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:27:14,938 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 791.0) internal successors, (3164), 4 states have internal predecessors, (3164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:27:14,938 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 791.0) internal successors, (3164), 4 states have internal predecessors, (3164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:27:14,938 INFO L175 Difference]: Start difference. First operand has 43 places, 50 transitions, 122 flow. Second operand 3 states and 1050 transitions. [2023-08-04 08:27:14,938 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 50 transitions, 214 flow [2023-08-04 08:27:14,939 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 50 transitions, 214 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 08:27:14,940 INFO L231 Difference]: Finished difference. Result has 45 places, 37 transitions, 94 flow [2023-08-04 08:27:14,940 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=791, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=94, PETRI_PLACES=45, PETRI_TRANSITIONS=37} [2023-08-04 08:27:14,941 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 2 predicate places. [2023-08-04 08:27:14,941 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 37 transitions, 94 flow [2023-08-04 08:27:14,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 336.6666666666667) internal successors, (1010), 3 states have internal predecessors, (1010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:27:14,942 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:27:14,942 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:27:14,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-04 08:27:14,942 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 08:27:14,942 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:27:14,942 INFO L85 PathProgramCache]: Analyzing trace with hash -474568048, now seen corresponding path program 1 times [2023-08-04 08:27:14,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:27:14,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373567375] [2023-08-04 08:27:14,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:27:14,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:27:14,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:27:15,032 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 08:27:15,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:27:15,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373567375] [2023-08-04 08:27:15,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373567375] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:27:15,033 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 08:27:15,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 08:27:15,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134141999] [2023-08-04 08:27:15,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:27:15,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 08:27:15,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:27:15,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 08:27:15,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-04 08:27:15,101 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 332 out of 791 [2023-08-04 08:27:15,103 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 37 transitions, 94 flow. Second operand has 4 states, 4 states have (on average 334.25) internal successors, (1337), 4 states have internal predecessors, (1337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:27:15,103 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:27:15,103 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 332 of 791 [2023-08-04 08:27:15,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:27:15,225 INFO L124 PetriNetUnfolderBase]: 438/711 cut-off events. [2023-08-04 08:27:15,225 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-08-04 08:27:15,226 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1453 conditions, 711 events. 438/711 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 2548 event pairs, 322 based on Foata normal form. 0/586 useless extension candidates. Maximal degree in co-relation 1440. Up to 702 conditions per place. [2023-08-04 08:27:15,235 INFO L140 encePairwiseOnDemand]: 786/791 looper letters, 32 selfloop transitions, 4 changer transitions 0/38 dead transitions. [2023-08-04 08:27:15,236 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 38 transitions, 168 flow [2023-08-04 08:27:15,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 08:27:15,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 08:27:15,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1365 transitions. [2023-08-04 08:27:15,239 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4314159292035398 [2023-08-04 08:27:15,239 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1365 transitions. [2023-08-04 08:27:15,239 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1365 transitions. [2023-08-04 08:27:15,240 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:27:15,240 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1365 transitions. [2023-08-04 08:27:15,244 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 341.25) internal successors, (1365), 4 states have internal predecessors, (1365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:27:15,248 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 791.0) internal successors, (3955), 5 states have internal predecessors, (3955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:27:15,249 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 791.0) internal successors, (3955), 5 states have internal predecessors, (3955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:27:15,249 INFO L175 Difference]: Start difference. First operand has 45 places, 37 transitions, 94 flow. Second operand 4 states and 1365 transitions. [2023-08-04 08:27:15,249 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 38 transitions, 168 flow [2023-08-04 08:27:15,249 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 38 transitions, 164 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-04 08:27:15,250 INFO L231 Difference]: Finished difference. Result has 39 places, 38 transitions, 108 flow [2023-08-04 08:27:15,250 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=791, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=108, PETRI_PLACES=39, PETRI_TRANSITIONS=38} [2023-08-04 08:27:15,251 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, -4 predicate places. [2023-08-04 08:27:15,251 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 38 transitions, 108 flow [2023-08-04 08:27:15,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 334.25) internal successors, (1337), 4 states have internal predecessors, (1337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:27:15,252 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:27:15,252 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:27:15,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-04 08:27:15,252 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 08:27:15,252 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:27:15,252 INFO L85 PathProgramCache]: Analyzing trace with hash 1415644422, now seen corresponding path program 1 times [2023-08-04 08:27:15,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:27:15,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805267022] [2023-08-04 08:27:15,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:27:15,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:27:15,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:27:15,346 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 08:27:15,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:27:15,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805267022] [2023-08-04 08:27:15,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805267022] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:27:15,346 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 08:27:15,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 08:27:15,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098864847] [2023-08-04 08:27:15,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:27:15,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 08:27:15,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:27:15,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 08:27:15,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-04 08:27:15,397 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 332 out of 791 [2023-08-04 08:27:15,398 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 38 transitions, 108 flow. Second operand has 4 states, 4 states have (on average 334.5) internal successors, (1338), 4 states have internal predecessors, (1338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:27:15,398 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:27:15,398 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 332 of 791 [2023-08-04 08:27:15,398 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:27:15,490 INFO L124 PetriNetUnfolderBase]: 438/712 cut-off events. [2023-08-04 08:27:15,490 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-08-04 08:27:15,491 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1462 conditions, 712 events. 438/712 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 2550 event pairs, 322 based on Foata normal form. 0/588 useless extension candidates. Maximal degree in co-relation 1440. Up to 704 conditions per place. [2023-08-04 08:27:15,493 INFO L140 encePairwiseOnDemand]: 787/791 looper letters, 34 selfloop transitions, 3 changer transitions 0/39 dead transitions. [2023-08-04 08:27:15,493 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 39 transitions, 184 flow [2023-08-04 08:27:15,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 08:27:15,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 08:27:15,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1364 transitions. [2023-08-04 08:27:15,497 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4310998735777497 [2023-08-04 08:27:15,497 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1364 transitions. [2023-08-04 08:27:15,498 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1364 transitions. [2023-08-04 08:27:15,498 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:27:15,498 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1364 transitions. [2023-08-04 08:27:15,501 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 341.0) internal successors, (1364), 4 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 08:27:15,505 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 791.0) internal successors, (3955), 5 states have internal predecessors, (3955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:27:15,506 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 791.0) internal successors, (3955), 5 states have internal predecessors, (3955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:27:15,506 INFO L175 Difference]: Start difference. First operand has 39 places, 38 transitions, 108 flow. Second operand 4 states and 1364 transitions. [2023-08-04 08:27:15,506 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 39 transitions, 184 flow [2023-08-04 08:27:15,506 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 39 transitions, 183 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:27:15,507 INFO L231 Difference]: Finished difference. Result has 42 places, 39 transitions, 121 flow [2023-08-04 08:27:15,507 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=791, PETRI_DIFFERENCE_MINUEND_FLOW=107, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=121, PETRI_PLACES=42, PETRI_TRANSITIONS=39} [2023-08-04 08:27:15,507 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, -1 predicate places. [2023-08-04 08:27:15,508 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 39 transitions, 121 flow [2023-08-04 08:27:15,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 334.5) internal successors, (1338), 4 states have internal predecessors, (1338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:27:15,508 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:27:15,508 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:27:15,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-04 08:27:15,508 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 08:27:15,509 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:27:15,509 INFO L85 PathProgramCache]: Analyzing trace with hash -404324650, now seen corresponding path program 1 times [2023-08-04 08:27:15,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:27:15,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270454133] [2023-08-04 08:27:15,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:27:15,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:27:15,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:27:15,577 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 08:27:15,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:27:15,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270454133] [2023-08-04 08:27:15,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270454133] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:27:15,577 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 08:27:15,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 08:27:15,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408959607] [2023-08-04 08:27:15,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:27:15,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 08:27:15,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:27:15,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 08:27:15,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-04 08:27:15,625 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 332 out of 791 [2023-08-04 08:27:15,626 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 39 transitions, 121 flow. Second operand has 4 states, 4 states have (on average 334.75) internal successors, (1339), 4 states have internal predecessors, (1339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:27:15,626 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:27:15,626 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 332 of 791 [2023-08-04 08:27:15,626 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:27:15,726 INFO L124 PetriNetUnfolderBase]: 438/713 cut-off events. [2023-08-04 08:27:15,726 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-04 08:27:15,727 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1471 conditions, 713 events. 438/713 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 2550 event pairs, 322 based on Foata normal form. 0/590 useless extension candidates. Maximal degree in co-relation 1447. Up to 705 conditions per place. [2023-08-04 08:27:15,729 INFO L140 encePairwiseOnDemand]: 787/791 looper letters, 35 selfloop transitions, 3 changer transitions 0/40 dead transitions. [2023-08-04 08:27:15,729 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 40 transitions, 199 flow [2023-08-04 08:27:15,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 08:27:15,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 08:27:15,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1364 transitions. [2023-08-04 08:27:15,733 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4310998735777497 [2023-08-04 08:27:15,733 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1364 transitions. [2023-08-04 08:27:15,733 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1364 transitions. [2023-08-04 08:27:15,734 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:27:15,734 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1364 transitions. [2023-08-04 08:27:15,736 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 341.0) internal successors, (1364), 4 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 08:27:15,741 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 791.0) internal successors, (3955), 5 states have internal predecessors, (3955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:27:15,741 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 791.0) internal successors, (3955), 5 states have internal predecessors, (3955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:27:15,742 INFO L175 Difference]: Start difference. First operand has 42 places, 39 transitions, 121 flow. Second operand 4 states and 1364 transitions. [2023-08-04 08:27:15,742 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 40 transitions, 199 flow [2023-08-04 08:27:15,742 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 40 transitions, 193 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-04 08:27:15,743 INFO L231 Difference]: Finished difference. Result has 44 places, 40 transitions, 129 flow [2023-08-04 08:27:15,743 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=791, PETRI_DIFFERENCE_MINUEND_FLOW=115, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=129, PETRI_PLACES=44, PETRI_TRANSITIONS=40} [2023-08-04 08:27:15,743 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 1 predicate places. [2023-08-04 08:27:15,743 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 40 transitions, 129 flow [2023-08-04 08:27:15,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 334.75) internal successors, (1339), 4 states have internal predecessors, (1339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:27:15,744 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:27:15,744 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:27:15,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-04 08:27:15,744 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 08:27:15,744 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:27:15,744 INFO L85 PathProgramCache]: Analyzing trace with hash -1923004965, now seen corresponding path program 1 times [2023-08-04 08:27:15,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:27:15,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488711133] [2023-08-04 08:27:15,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:27:15,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:27:15,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 08:27:15,814 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 08:27:15,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 08:27:15,875 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 08:27:15,875 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 08:27:15,876 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-04 08:27:15,876 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-04 08:27:15,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-04 08:27:15,876 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2023-08-04 08:27:15,877 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN (2/2) [2023-08-04 08:27:15,877 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 08:27:15,877 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 08:27:15,926 INFO L144 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2023-08-04 08:27:15,930 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 436 places, 475 transitions, 998 flow [2023-08-04 08:27:16,130 INFO L124 PetriNetUnfolderBase]: 168/1316 cut-off events. [2023-08-04 08:27:16,130 INFO L125 PetriNetUnfolderBase]: For 72/103 co-relation queries the response was YES. [2023-08-04 08:27:16,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1413 conditions, 1316 events. 168/1316 cut-off events. For 72/103 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 7133 event pairs, 1 based on Foata normal form. 0/1141 useless extension candidates. Maximal degree in co-relation 860. Up to 32 conditions per place. [2023-08-04 08:27:16,149 INFO L82 GeneralOperation]: Start removeDead. Operand has 436 places, 475 transitions, 998 flow [2023-08-04 08:27:16,155 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 436 places, 475 transitions, 998 flow [2023-08-04 08:27:16,155 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 08:27:16,155 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 436 places, 475 transitions, 998 flow [2023-08-04 08:27:16,155 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 436 places, 475 transitions, 998 flow [2023-08-04 08:27:16,155 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 436 places, 475 transitions, 998 flow [2023-08-04 08:27:16,381 INFO L124 PetriNetUnfolderBase]: 168/1316 cut-off events. [2023-08-04 08:27:16,381 INFO L125 PetriNetUnfolderBase]: For 72/103 co-relation queries the response was YES. [2023-08-04 08:27:16,402 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1413 conditions, 1316 events. 168/1316 cut-off events. For 72/103 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 7133 event pairs, 1 based on Foata normal form. 0/1141 useless extension candidates. Maximal degree in co-relation 860. Up to 32 conditions per place. [2023-08-04 08:27:16,450 INFO L119 LiptonReduction]: Number of co-enabled transitions 50688 [2023-08-04 08:27:27,426 INFO L134 LiptonReduction]: Checked pairs total: 111698 [2023-08-04 08:27:27,426 INFO L136 LiptonReduction]: Total number of compositions: 504 [2023-08-04 08:27:27,428 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 08:27:27,428 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;@5bdc2670, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 08:27:27,428 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 08:27:27,432 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 08:27:27,432 INFO L124 PetriNetUnfolderBase]: 4/21 cut-off events. [2023-08-04 08:27:27,433 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 08:27:27,433 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:27:27,433 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:27:27,433 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:27:27,433 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:27:27,433 INFO L85 PathProgramCache]: Analyzing trace with hash 1224350251, now seen corresponding path program 1 times [2023-08-04 08:27:27,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:27:27,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815048076] [2023-08-04 08:27:27,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:27:27,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:27:27,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:27:27,471 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 08:27:27,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:27:27,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815048076] [2023-08-04 08:27:27,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815048076] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:27:27,471 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 08:27:27,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 08:27:27,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758983381] [2023-08-04 08:27:27,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:27:27,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:27:27,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:27:27,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:27:27,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 08:27:27,482 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 430 out of 979 [2023-08-04 08:27:27,483 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 92 transitions, 232 flow. Second operand has 3 states, 3 states have (on average 433.0) internal successors, (1299), 3 states have internal predecessors, (1299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:27:27,483 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:27:27,483 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 430 of 979 [2023-08-04 08:27:27,483 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:27:56,808 INFO L124 PetriNetUnfolderBase]: 355686/454668 cut-off events. [2023-08-04 08:27:56,808 INFO L125 PetriNetUnfolderBase]: For 20560/20560 co-relation queries the response was YES. [2023-08-04 08:27:57,774 INFO L83 FinitePrefix]: Finished finitePrefix Result has 911439 conditions, 454668 events. 355686/454668 cut-off events. For 20560/20560 co-relation queries the response was YES. Maximal size of possible extension queue 10259. Compared 2887104 event pairs, 206550 based on Foata normal form. 7972/351736 useless extension candidates. Maximal degree in co-relation 128937. Up to 445280 conditions per place. [2023-08-04 08:27:59,436 INFO L140 encePairwiseOnDemand]: 972/979 looper letters, 84 selfloop transitions, 2 changer transitions 2/100 dead transitions. [2023-08-04 08:27:59,436 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 100 transitions, 420 flow [2023-08-04 08:27:59,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:27:59,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:27:59,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1381 transitions. [2023-08-04 08:27:59,440 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47020769492679604 [2023-08-04 08:27:59,440 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1381 transitions. [2023-08-04 08:27:59,440 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1381 transitions. [2023-08-04 08:27:59,441 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:27:59,441 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1381 transitions. [2023-08-04 08:27:59,443 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 460.3333333333333) internal successors, (1381), 3 states have internal predecessors, (1381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:27:59,447 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 979.0) internal successors, (3916), 4 states have internal predecessors, (3916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:27:59,448 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 979.0) internal successors, (3916), 4 states have internal predecessors, (3916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:27:59,448 INFO L175 Difference]: Start difference. First operand has 78 places, 92 transitions, 232 flow. Second operand 3 states and 1381 transitions. [2023-08-04 08:27:59,448 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 100 transitions, 420 flow [2023-08-04 08:27:59,477 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 100 transitions, 420 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 08:27:59,478 INFO L231 Difference]: Finished difference. Result has 80 places, 87 transitions, 224 flow [2023-08-04 08:27:59,478 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=979, PETRI_DIFFERENCE_MINUEND_FLOW=224, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=224, PETRI_PLACES=80, PETRI_TRANSITIONS=87} [2023-08-04 08:27:59,479 INFO L281 CegarLoopForPetriNet]: 78 programPoint places, 2 predicate places. [2023-08-04 08:27:59,479 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 87 transitions, 224 flow [2023-08-04 08:27:59,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 433.0) internal successors, (1299), 3 states have internal predecessors, (1299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:27:59,479 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:27:59,479 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:27:59,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-04 08:27:59,480 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:27:59,480 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:27:59,480 INFO L85 PathProgramCache]: Analyzing trace with hash -1703969220, now seen corresponding path program 1 times [2023-08-04 08:27:59,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:27:59,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396735735] [2023-08-04 08:27:59,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:27:59,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:27:59,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:27:59,525 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 08:27:59,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:27:59,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396735735] [2023-08-04 08:27:59,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396735735] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:27:59,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920334480] [2023-08-04 08:27:59,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:27:59,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:27:59,526 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:27:59,529 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 08:27:59,536 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 08:27:59,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:27:59,649 INFO L262 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:27:59,650 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:27:59,655 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 08:27:59,655 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:27:59,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1920334480] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:27:59,655 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:27:59,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 08:27:59,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850423935] [2023-08-04 08:27:59,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:27:59,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:27:59,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:27:59,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:27:59,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:27:59,665 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 430 out of 979 [2023-08-04 08:27:59,666 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 87 transitions, 224 flow. Second operand has 3 states, 3 states have (on average 434.0) internal successors, (1302), 3 states have internal predecessors, (1302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:27:59,666 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:27:59,666 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 430 of 979 [2023-08-04 08:27:59,667 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:28:27,831 INFO L124 PetriNetUnfolderBase]: 355596/460089 cut-off events. [2023-08-04 08:28:27,831 INFO L125 PetriNetUnfolderBase]: For 20412/20412 co-relation queries the response was YES. [2023-08-04 08:28:28,908 INFO L83 FinitePrefix]: Finished finitePrefix Result has 916728 conditions, 460089 events. 355596/460089 cut-off events. For 20412/20412 co-relation queries the response was YES. Maximal size of possible extension queue 10403. Compared 3021698 event pairs, 206000 based on Foata normal form. 0/351016 useless extension candidates. Maximal degree in co-relation 916637. Up to 441943 conditions per place. [2023-08-04 08:28:30,438 INFO L140 encePairwiseOnDemand]: 976/979 looper letters, 105 selfloop transitions, 2 changer transitions 0/119 dead transitions. [2023-08-04 08:28:30,438 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 119 transitions, 502 flow [2023-08-04 08:28:30,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:28:30,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:28:30,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1397 transitions. [2023-08-04 08:28:30,441 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4756554307116105 [2023-08-04 08:28:30,441 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1397 transitions. [2023-08-04 08:28:30,441 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1397 transitions. [2023-08-04 08:28:30,442 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:28:30,442 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1397 transitions. [2023-08-04 08:28:30,445 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 465.6666666666667) internal successors, (1397), 3 states have internal predecessors, (1397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:28:30,451 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 979.0) internal successors, (3916), 4 states have internal predecessors, (3916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:28:30,452 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 979.0) internal successors, (3916), 4 states have internal predecessors, (3916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:28:30,452 INFO L175 Difference]: Start difference. First operand has 80 places, 87 transitions, 224 flow. Second operand 3 states and 1397 transitions. [2023-08-04 08:28:30,452 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 119 transitions, 502 flow [2023-08-04 08:28:30,891 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 119 transitions, 494 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-04 08:28:30,892 INFO L231 Difference]: Finished difference. Result has 78 places, 88 transitions, 228 flow [2023-08-04 08:28:30,892 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=979, PETRI_DIFFERENCE_MINUEND_FLOW=216, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=228, PETRI_PLACES=78, PETRI_TRANSITIONS=88} [2023-08-04 08:28:30,892 INFO L281 CegarLoopForPetriNet]: 78 programPoint places, 0 predicate places. [2023-08-04 08:28:30,892 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 88 transitions, 228 flow [2023-08-04 08:28:30,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 434.0) internal successors, (1302), 3 states have internal predecessors, (1302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:28:30,893 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:28:30,893 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 08:28:30,902 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 08:28:31,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-08-04 08:28:31,100 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:28:31,101 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:28:31,101 INFO L85 PathProgramCache]: Analyzing trace with hash 999094407, now seen corresponding path program 1 times [2023-08-04 08:28:31,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:28:31,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069400271] [2023-08-04 08:28:31,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:28:31,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:28:31,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:28:31,179 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 08:28:31,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:28:31,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069400271] [2023-08-04 08:28:31,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069400271] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:28:31,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401420541] [2023-08-04 08:28:31,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:28:31,180 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:28:31,180 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:28:31,181 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 08:28:31,210 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 08:28:31,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:28:31,321 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:28:31,322 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:28:31,328 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 08:28:31,328 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:28:31,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1401420541] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:28:31,328 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:28:31,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 08:28:31,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371871981] [2023-08-04 08:28:31,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:28:31,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:28:31,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:28:31,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:28:31,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:28:31,338 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 430 out of 979 [2023-08-04 08:28:31,339 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 88 transitions, 228 flow. Second operand has 3 states, 3 states have (on average 435.0) internal successors, (1305), 3 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:28:31,339 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:28:31,339 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 430 of 979 [2023-08-04 08:28:31,339 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:28:51,281 INFO L124 PetriNetUnfolderBase]: 255439/329957 cut-off events. [2023-08-04 08:28:51,282 INFO L125 PetriNetUnfolderBase]: For 23761/23761 co-relation queries the response was YES. [2023-08-04 08:28:52,234 INFO L83 FinitePrefix]: Finished finitePrefix Result has 680347 conditions, 329957 events. 255439/329957 cut-off events. For 23761/23761 co-relation queries the response was YES. Maximal size of possible extension queue 6925. Compared 2118329 event pairs, 132335 based on Foata normal form. 0/265055 useless extension candidates. Maximal degree in co-relation 506601. Up to 215496 conditions per place. [2023-08-04 08:28:53,832 INFO L140 encePairwiseOnDemand]: 976/979 looper letters, 121 selfloop transitions, 2 changer transitions 0/135 dead transitions. [2023-08-04 08:28:53,832 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 135 transitions, 578 flow [2023-08-04 08:28:53,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:28:53,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:28:53,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1412 transitions. [2023-08-04 08:28:53,846 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.480762683009874 [2023-08-04 08:28:53,846 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1412 transitions. [2023-08-04 08:28:53,846 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1412 transitions. [2023-08-04 08:28:53,847 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:28:53,847 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1412 transitions. [2023-08-04 08:28:53,860 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 470.6666666666667) internal successors, (1412), 3 states have internal predecessors, (1412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:28:53,863 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 979.0) internal successors, (3916), 4 states have internal predecessors, (3916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:28:53,864 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 979.0) internal successors, (3916), 4 states have internal predecessors, (3916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:28:53,864 INFO L175 Difference]: Start difference. First operand has 78 places, 88 transitions, 228 flow. Second operand 3 states and 1412 transitions. [2023-08-04 08:28:53,864 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 135 transitions, 578 flow [2023-08-04 08:28:53,887 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 135 transitions, 576 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:28:53,889 INFO L231 Difference]: Finished difference. Result has 80 places, 89 transitions, 238 flow [2023-08-04 08:28:53,889 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=979, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=238, PETRI_PLACES=80, PETRI_TRANSITIONS=89} [2023-08-04 08:28:53,890 INFO L281 CegarLoopForPetriNet]: 78 programPoint places, 2 predicate places. [2023-08-04 08:28:53,890 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 89 transitions, 238 flow [2023-08-04 08:28:53,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 435.0) internal successors, (1305), 3 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:28:53,890 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:28:53,890 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] [2023-08-04 08:28:53,914 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-08-04 08:28:54,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:28:54,111 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:28:54,111 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:28:54,111 INFO L85 PathProgramCache]: Analyzing trace with hash 2144070405, now seen corresponding path program 1 times [2023-08-04 08:28:54,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:28:54,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768452978] [2023-08-04 08:28:54,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:28:54,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:28:54,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:28:54,217 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 08:28:54,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:28:54,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768452978] [2023-08-04 08:28:54,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768452978] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:28:54,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387139748] [2023-08-04 08:28:54,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:28:54,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:28:54,218 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:28:54,241 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 08:28:54,285 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 08:28:54,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:28:54,411 INFO L262 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:28:54,412 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:28:54,416 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 08:28:54,417 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:28:54,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1387139748] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:28:54,417 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:28:54,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 08:28:54,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3325213] [2023-08-04 08:28:54,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:28:54,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:28:54,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:28:54,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:28:54,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:28:54,425 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 427 out of 979 [2023-08-04 08:28:54,426 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 89 transitions, 238 flow. Second operand has 3 states, 3 states have (on average 434.6666666666667) internal successors, (1304), 3 states have internal predecessors, (1304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:28:54,426 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:28:54,426 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 427 of 979 [2023-08-04 08:28:54,426 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:29:16,610 INFO L124 PetriNetUnfolderBase]: 280631/361539 cut-off events. [2023-08-04 08:29:16,610 INFO L125 PetriNetUnfolderBase]: For 85400/85400 co-relation queries the response was YES. [2023-08-04 08:29:17,473 INFO L83 FinitePrefix]: Finished finitePrefix Result has 767999 conditions, 361539 events. 280631/361539 cut-off events. For 85400/85400 co-relation queries the response was YES. Maximal size of possible extension queue 7500. Compared 2325475 event pairs, 159875 based on Foata normal form. 0/295673 useless extension candidates. Maximal degree in co-relation 584399. Up to 252920 conditions per place. [2023-08-04 08:29:18,631 INFO L140 encePairwiseOnDemand]: 975/979 looper letters, 130 selfloop transitions, 3 changer transitions 0/145 dead transitions. [2023-08-04 08:29:18,631 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 145 transitions, 665 flow [2023-08-04 08:29:18,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:29:18,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:29:18,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1409 transitions. [2023-08-04 08:29:18,634 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47974123255022133 [2023-08-04 08:29:18,634 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1409 transitions. [2023-08-04 08:29:18,634 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1409 transitions. [2023-08-04 08:29:18,634 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:29:18,634 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1409 transitions. [2023-08-04 08:29:18,636 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 469.6666666666667) internal successors, (1409), 3 states have internal predecessors, (1409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:29:18,639 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 979.0) internal successors, (3916), 4 states have internal predecessors, (3916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:29:18,639 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 979.0) internal successors, (3916), 4 states have internal predecessors, (3916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:29:18,639 INFO L175 Difference]: Start difference. First operand has 80 places, 89 transitions, 238 flow. Second operand 3 states and 1409 transitions. [2023-08-04 08:29:18,639 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 145 transitions, 665 flow [2023-08-04 08:29:19,307 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 145 transitions, 661 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:29:19,309 INFO L231 Difference]: Finished difference. Result has 83 places, 90 transitions, 254 flow [2023-08-04 08:29:19,309 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=979, PETRI_DIFFERENCE_MINUEND_FLOW=236, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=254, PETRI_PLACES=83, PETRI_TRANSITIONS=90} [2023-08-04 08:29:19,309 INFO L281 CegarLoopForPetriNet]: 78 programPoint places, 5 predicate places. [2023-08-04 08:29:19,310 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 90 transitions, 254 flow [2023-08-04 08:29:19,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 434.6666666666667) internal successors, (1304), 3 states have internal predecessors, (1304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:29:19,310 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:29:19,310 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] [2023-08-04 08:29:19,317 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 08:29:19,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2023-08-04 08:29:19,516 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:29:19,516 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:29:19,516 INFO L85 PathProgramCache]: Analyzing trace with hash 1895874962, now seen corresponding path program 1 times [2023-08-04 08:29:19,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:29:19,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372464570] [2023-08-04 08:29:19,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:29:19,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:29:19,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:29:19,575 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 08:29:19,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:29:19,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372464570] [2023-08-04 08:29:19,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372464570] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:29:19,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358430995] [2023-08-04 08:29:19,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:29:19,576 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:29:19,576 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:29:19,577 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 08:29:19,579 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 08:29:19,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:29:19,712 INFO L262 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:29:19,713 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:29:19,718 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 08:29:19,718 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:29:19,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1358430995] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:29:19,718 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:29:19,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 08:29:19,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98743841] [2023-08-04 08:29:19,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:29:19,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:29:19,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:29:19,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:29:19,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:29:19,727 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 427 out of 979 [2023-08-04 08:29:19,728 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 90 transitions, 254 flow. Second operand has 3 states, 3 states have (on average 434.6666666666667) internal successors, (1304), 3 states have internal predecessors, (1304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:29:19,728 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:29:19,728 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 427 of 979 [2023-08-04 08:29:19,728 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:29:44,412 INFO L124 PetriNetUnfolderBase]: 308197/397200 cut-off events. [2023-08-04 08:29:44,413 INFO L125 PetriNetUnfolderBase]: For 143084/143084 co-relation queries the response was YES. [2023-08-04 08:29:45,390 INFO L83 FinitePrefix]: Finished finitePrefix Result has 899109 conditions, 397200 events. 308197/397200 cut-off events. For 143084/143084 co-relation queries the response was YES. Maximal size of possible extension queue 8109. Compared 2560053 event pairs, 176957 based on Foata normal form. 0/341530 useless extension candidates. Maximal degree in co-relation 693562. Up to 278296 conditions per place. [2023-08-04 08:29:46,652 INFO L140 encePairwiseOnDemand]: 975/979 looper letters, 126 selfloop transitions, 3 changer transitions 0/141 dead transitions. [2023-08-04 08:29:46,652 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 141 transitions, 662 flow [2023-08-04 08:29:46,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:29:46,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:29:46,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1404 transitions. [2023-08-04 08:29:46,655 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4780388151174668 [2023-08-04 08:29:46,655 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1404 transitions. [2023-08-04 08:29:46,655 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1404 transitions. [2023-08-04 08:29:46,655 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:29:46,655 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1404 transitions. [2023-08-04 08:29:46,657 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 468.0) internal successors, (1404), 3 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:29:46,659 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 979.0) internal successors, (3916), 4 states have internal predecessors, (3916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:29:46,659 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 979.0) internal successors, (3916), 4 states have internal predecessors, (3916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:29:46,660 INFO L175 Difference]: Start difference. First operand has 83 places, 90 transitions, 254 flow. Second operand 3 states and 1404 transitions. [2023-08-04 08:29:46,660 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 141 transitions, 662 flow [2023-08-04 08:29:48,098 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 141 transitions, 650 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 08:29:48,099 INFO L231 Difference]: Finished difference. Result has 85 places, 91 transitions, 266 flow [2023-08-04 08:29:48,099 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=979, PETRI_DIFFERENCE_MINUEND_FLOW=248, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=266, PETRI_PLACES=85, PETRI_TRANSITIONS=91} [2023-08-04 08:29:48,100 INFO L281 CegarLoopForPetriNet]: 78 programPoint places, 7 predicate places. [2023-08-04 08:29:48,100 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 91 transitions, 266 flow [2023-08-04 08:29:48,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 434.6666666666667) internal successors, (1304), 3 states have internal predecessors, (1304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:29:48,100 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:29:48,100 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 08:29:48,105 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-08-04 08:29:48,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:29:48,302 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:29:48,302 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:29:48,302 INFO L85 PathProgramCache]: Analyzing trace with hash -96907978, now seen corresponding path program 1 times [2023-08-04 08:29:48,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:29:48,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026934733] [2023-08-04 08:29:48,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:29:48,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:29:48,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:29:48,358 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 08:29:48,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:29:48,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026934733] [2023-08-04 08:29:48,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026934733] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:29:48,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43407272] [2023-08-04 08:29:48,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:29:48,359 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:29:48,359 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:29:48,360 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:29:48,363 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-08-04 08:29:48,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:29:48,505 INFO L262 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:29:48,507 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:29:48,513 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 08:29:48,513 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:29:48,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [43407272] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:29:48,513 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:29:48,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-08-04 08:29:48,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898081742] [2023-08-04 08:29:48,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:29:48,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:29:48,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:29:48,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:29:48,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:29:48,524 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 430 out of 979 [2023-08-04 08:29:48,524 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 91 transitions, 266 flow. Second operand has 3 states, 3 states have (on average 438.0) internal successors, (1314), 3 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:29:48,524 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:29:48,525 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 430 of 979 [2023-08-04 08:29:48,525 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:30:14,792 INFO L124 PetriNetUnfolderBase]: 298111/386224 cut-off events. [2023-08-04 08:30:14,792 INFO L125 PetriNetUnfolderBase]: For 156620/156620 co-relation queries the response was YES. [2023-08-04 08:30:15,844 INFO L83 FinitePrefix]: Finished finitePrefix Result has 909832 conditions, 386224 events. 298111/386224 cut-off events. For 156620/156620 co-relation queries the response was YES. Maximal size of possible extension queue 7961. Compared 2476532 event pairs, 216614 based on Foata normal form. 0/342514 useless extension candidates. Maximal degree in co-relation 696797. Up to 339887 conditions per place. [2023-08-04 08:30:16,870 INFO L140 encePairwiseOnDemand]: 976/979 looper letters, 126 selfloop transitions, 2 changer transitions 0/140 dead transitions. [2023-08-04 08:30:16,870 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 140 transitions, 656 flow [2023-08-04 08:30:16,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:30:16,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:30:16,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1412 transitions. [2023-08-04 08:30:16,873 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.480762683009874 [2023-08-04 08:30:16,873 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1412 transitions. [2023-08-04 08:30:16,873 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1412 transitions. [2023-08-04 08:30:16,873 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:30:16,873 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1412 transitions. [2023-08-04 08:30:16,875 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 470.6666666666667) internal successors, (1412), 3 states have internal predecessors, (1412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:30:16,877 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 979.0) internal successors, (3916), 4 states have internal predecessors, (3916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:30:16,877 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 979.0) internal successors, (3916), 4 states have internal predecessors, (3916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:30:16,877 INFO L175 Difference]: Start difference. First operand has 85 places, 91 transitions, 266 flow. Second operand 3 states and 1412 transitions. [2023-08-04 08:30:16,877 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 140 transitions, 656 flow [2023-08-04 08:30:34,223 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 140 transitions, 644 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 08:30:34,225 INFO L231 Difference]: Finished difference. Result has 86 places, 92 transitions, 272 flow [2023-08-04 08:30:34,225 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=979, PETRI_DIFFERENCE_MINUEND_FLOW=260, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=272, PETRI_PLACES=86, PETRI_TRANSITIONS=92} [2023-08-04 08:30:34,225 INFO L281 CegarLoopForPetriNet]: 78 programPoint places, 8 predicate places. [2023-08-04 08:30:34,225 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 92 transitions, 272 flow [2023-08-04 08:30:34,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 438.0) internal successors, (1314), 3 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:30:34,226 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:30:34,226 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:30:34,230 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-08-04 08:30:34,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:30:34,426 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:30:34,427 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:30:34,427 INFO L85 PathProgramCache]: Analyzing trace with hash -1970486181, now seen corresponding path program 1 times [2023-08-04 08:30:34,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:30:34,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598752044] [2023-08-04 08:30:34,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:30:34,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:30:34,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:30:34,485 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 08:30:34,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:30:34,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598752044] [2023-08-04 08:30:34,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598752044] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:30:34,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085123243] [2023-08-04 08:30:34,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:30:34,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:30:34,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:30:34,487 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:30:34,489 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-08-04 08:30:34,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:30:34,631 INFO L262 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-04 08:30:34,632 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:30:34,648 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 08:30:34,648 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:30:34,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1085123243] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:30:34,649 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:30:34,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-08-04 08:30:34,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132917554] [2023-08-04 08:30:34,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:30:34,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:30:34,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:30:34,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:30:34,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:30:34,680 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 426 out of 979 [2023-08-04 08:30:34,681 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 92 transitions, 272 flow. Second operand has 3 states, 3 states have (on average 437.0) internal successors, (1311), 3 states have internal predecessors, (1311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:30:34,681 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:30:34,681 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 426 of 979 [2023-08-04 08:30:34,681 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:31:00,017 INFO L124 PetriNetUnfolderBase]: 298111/386225 cut-off events. [2023-08-04 08:31:00,018 INFO L125 PetriNetUnfolderBase]: For 117179/117179 co-relation queries the response was YES. [2023-08-04 08:31:01,067 INFO L83 FinitePrefix]: Finished finitePrefix Result has 894412 conditions, 386225 events. 298111/386225 cut-off events. For 117179/117179 co-relation queries the response was YES. Maximal size of possible extension queue 7961. Compared 2477110 event pairs, 239748 based on Foata normal form. 0/335924 useless extension candidates. Maximal degree in co-relation 786077. Up to 378148 conditions per place. [2023-08-04 08:31:02,078 INFO L140 encePairwiseOnDemand]: 976/979 looper letters, 79 selfloop transitions, 2 changer transitions 0/93 dead transitions. [2023-08-04 08:31:02,078 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 93 transitions, 436 flow [2023-08-04 08:31:02,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:31:02,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:31:02,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1354 transitions. [2023-08-04 08:31:02,081 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4610146407899217 [2023-08-04 08:31:02,081 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1354 transitions. [2023-08-04 08:31:02,081 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1354 transitions. [2023-08-04 08:31:02,081 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:31:02,081 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1354 transitions. [2023-08-04 08:31:02,083 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 451.3333333333333) internal successors, (1354), 3 states have internal predecessors, (1354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:31:02,084 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 979.0) internal successors, (3916), 4 states have internal predecessors, (3916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:31:02,084 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 979.0) internal successors, (3916), 4 states have internal predecessors, (3916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:31:02,085 INFO L175 Difference]: Start difference. First operand has 86 places, 92 transitions, 272 flow. Second operand 3 states and 1354 transitions. [2023-08-04 08:31:02,085 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 93 transitions, 436 flow [2023-08-04 08:31:11,181 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 93 transitions, 434 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:31:11,182 INFO L231 Difference]: Finished difference. Result has 88 places, 93 transitions, 282 flow [2023-08-04 08:31:11,182 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=979, PETRI_DIFFERENCE_MINUEND_FLOW=270, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=282, PETRI_PLACES=88, PETRI_TRANSITIONS=93} [2023-08-04 08:31:11,183 INFO L281 CegarLoopForPetriNet]: 78 programPoint places, 10 predicate places. [2023-08-04 08:31:11,183 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 93 transitions, 282 flow [2023-08-04 08:31:11,183 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 437.0) internal successors, (1311), 3 states have internal predecessors, (1311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:31:11,183 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:31:11,183 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:31:11,188 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-08-04 08:31:11,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-08-04 08:31:11,383 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:31:11,384 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:31:11,384 INFO L85 PathProgramCache]: Analyzing trace with hash -1895140420, now seen corresponding path program 1 times [2023-08-04 08:31:11,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:31:11,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180148671] [2023-08-04 08:31:11,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:31:11,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:31:11,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:31:11,452 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 08:31:11,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:31:11,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180148671] [2023-08-04 08:31:11,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180148671] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:31:11,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516763927] [2023-08-04 08:31:11,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:31:11,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:31:11,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:31:11,453 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:31:11,456 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-08-04 08:31:11,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:31:11,608 INFO L262 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-04 08:31:11,609 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:31:11,629 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 08:31:11,629 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:31:11,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [516763927] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:31:11,630 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:31:11,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2023-08-04 08:31:11,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271936888] [2023-08-04 08:31:11,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:31:11,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 08:31:11,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:31:11,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 08:31:11,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-08-04 08:31:11,712 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 424 out of 979 [2023-08-04 08:31:11,713 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 93 transitions, 282 flow. Second operand has 4 states, 4 states have (on average 432.5) internal successors, (1730), 4 states have internal predecessors, (1730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:31:11,713 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:31:11,713 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 424 of 979 [2023-08-04 08:31:11,713 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:31:40,921 INFO L124 PetriNetUnfolderBase]: 298111/386226 cut-off events. [2023-08-04 08:31:40,921 INFO L125 PetriNetUnfolderBase]: For 112869/112869 co-relation queries the response was YES. [2023-08-04 08:31:42,132 INFO L83 FinitePrefix]: Finished finitePrefix Result has 893810 conditions, 386226 events. 298111/386226 cut-off events. For 112869/112869 co-relation queries the response was YES. Maximal size of possible extension queue 7961. Compared 2477154 event pairs, 239748 based on Foata normal form. 0/335925 useless extension candidates. Maximal degree in co-relation 893789. Up to 378147 conditions per place. [2023-08-04 08:31:43,234 INFO L140 encePairwiseOnDemand]: 974/979 looper letters, 78 selfloop transitions, 4 changer transitions 0/94 dead transitions. [2023-08-04 08:31:43,234 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 94 transitions, 448 flow [2023-08-04 08:31:43,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 08:31:43,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 08:31:43,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1773 transitions. [2023-08-04 08:31:43,237 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4527579162410623 [2023-08-04 08:31:43,237 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1773 transitions. [2023-08-04 08:31:43,237 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1773 transitions. [2023-08-04 08:31:43,237 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:31:43,237 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1773 transitions. [2023-08-04 08:31:43,239 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 443.25) internal successors, (1773), 4 states have internal predecessors, (1773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:31:43,242 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 979.0) internal successors, (4895), 5 states have internal predecessors, (4895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:31:43,242 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 979.0) internal successors, (4895), 5 states have internal predecessors, (4895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:31:43,242 INFO L175 Difference]: Start difference. First operand has 88 places, 93 transitions, 282 flow. Second operand 4 states and 1773 transitions. [2023-08-04 08:31:43,242 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 94 transitions, 448 flow [2023-08-04 08:31:47,948 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 94 transitions, 444 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-04 08:31:47,949 INFO L231 Difference]: Finished difference. Result has 91 places, 94 transitions, 296 flow [2023-08-04 08:31:47,949 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=979, PETRI_DIFFERENCE_MINUEND_FLOW=278, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=296, PETRI_PLACES=91, PETRI_TRANSITIONS=94} [2023-08-04 08:31:47,949 INFO L281 CegarLoopForPetriNet]: 78 programPoint places, 13 predicate places. [2023-08-04 08:31:47,950 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 94 transitions, 296 flow [2023-08-04 08:31:47,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 432.5) internal successors, (1730), 4 states have internal predecessors, (1730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:31:47,950 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:31:47,950 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:31:47,957 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-08-04 08:31:48,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:31:48,151 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:31:48,151 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:31:48,151 INFO L85 PathProgramCache]: Analyzing trace with hash 184088473, now seen corresponding path program 1 times [2023-08-04 08:31:48,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:31:48,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699983103] [2023-08-04 08:31:48,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:31:48,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:31:48,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:31:48,208 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 08:31:48,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:31:48,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699983103] [2023-08-04 08:31:48,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699983103] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:31:48,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944162809] [2023-08-04 08:31:48,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:31:48,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:31:48,208 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:31:48,209 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:31:48,216 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-08-04 08:31:48,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:31:48,372 INFO L262 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-04 08:31:48,374 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:31:48,397 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 08:31:48,397 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:31:48,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1944162809] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:31:48,397 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:31:48,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2023-08-04 08:31:48,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357666957] [2023-08-04 08:31:48,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:31:48,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 08:31:48,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:31:48,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 08:31:48,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-08-04 08:31:48,485 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 424 out of 979 [2023-08-04 08:31:48,486 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 94 transitions, 296 flow. Second operand has 4 states, 4 states have (on average 432.75) internal successors, (1731), 4 states have internal predecessors, (1731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:31:48,486 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:31:48,486 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 424 of 979 [2023-08-04 08:31:48,486 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:32:14,805 INFO L124 PetriNetUnfolderBase]: 298111/386227 cut-off events. [2023-08-04 08:32:14,805 INFO L125 PetriNetUnfolderBase]: For 112869/112869 co-relation queries the response was YES. [2023-08-04 08:32:16,051 INFO L83 FinitePrefix]: Finished finitePrefix Result has 893819 conditions, 386227 events. 298111/386227 cut-off events. For 112869/112869 co-relation queries the response was YES. Maximal size of possible extension queue 7961. Compared 2476622 event pairs, 239748 based on Foata normal form. 0/335927 useless extension candidates. Maximal degree in co-relation 893789. Up to 378149 conditions per place. [2023-08-04 08:32:17,107 INFO L140 encePairwiseOnDemand]: 975/979 looper letters, 80 selfloop transitions, 3 changer transitions 0/95 dead transitions. [2023-08-04 08:32:17,107 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 95 transitions, 464 flow [2023-08-04 08:32:17,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 08:32:17,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 08:32:17,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1772 transitions. [2023-08-04 08:32:17,109 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4525025536261491 [2023-08-04 08:32:17,109 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1772 transitions. [2023-08-04 08:32:17,109 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1772 transitions. [2023-08-04 08:32:17,110 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:32:17,110 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1772 transitions. [2023-08-04 08:32:17,113 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 443.0) internal successors, (1772), 4 states have internal predecessors, (1772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:32:17,116 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 979.0) internal successors, (4895), 5 states have internal predecessors, (4895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:32:17,116 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 979.0) internal successors, (4895), 5 states have internal predecessors, (4895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:32:17,116 INFO L175 Difference]: Start difference. First operand has 91 places, 94 transitions, 296 flow. Second operand 4 states and 1772 transitions. [2023-08-04 08:32:17,116 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 95 transitions, 464 flow [2023-08-04 08:32:22,097 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 95 transitions, 463 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:32:22,098 INFO L231 Difference]: Finished difference. Result has 94 places, 95 transitions, 309 flow [2023-08-04 08:32:22,098 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=979, PETRI_DIFFERENCE_MINUEND_FLOW=295, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=309, PETRI_PLACES=94, PETRI_TRANSITIONS=95} [2023-08-04 08:32:22,098 INFO L281 CegarLoopForPetriNet]: 78 programPoint places, 16 predicate places. [2023-08-04 08:32:22,098 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 95 transitions, 309 flow [2023-08-04 08:32:22,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 432.75) internal successors, (1731), 4 states have internal predecessors, (1731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:32:22,099 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:32:22,099 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:32:22,104 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-08-04 08:32:22,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:32:22,304 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:32:22,305 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:32:22,305 INFO L85 PathProgramCache]: Analyzing trace with hash -2115227629, now seen corresponding path program 1 times [2023-08-04 08:32:22,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:32:22,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302069090] [2023-08-04 08:32:22,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:32:22,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:32:22,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:32:22,377 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 08:32:22,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:32:22,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302069090] [2023-08-04 08:32:22,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302069090] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:32:22,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734300585] [2023-08-04 08:32:22,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:32:22,378 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:32:22,378 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:32:22,379 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:32:22,411 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-08-04 08:32:22,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:32:22,555 INFO L262 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-04 08:32:22,557 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:32:22,585 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-04 08:32:22,585 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:32:22,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1734300585] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:32:22,585 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:32:22,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2023-08-04 08:32:22,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709614577] [2023-08-04 08:32:22,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:32:22,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 08:32:22,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:32:22,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 08:32:22,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-08-04 08:32:22,641 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 424 out of 979 [2023-08-04 08:32:22,642 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 95 transitions, 309 flow. Second operand has 4 states, 4 states have (on average 433.0) internal successors, (1732), 4 states have internal predecessors, (1732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:32:22,642 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:32:22,642 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 424 of 979 [2023-08-04 08:32:22,642 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:32:51,716 INFO L124 PetriNetUnfolderBase]: 298111/386228 cut-off events. [2023-08-04 08:32:51,716 INFO L125 PetriNetUnfolderBase]: For 112870/112870 co-relation queries the response was YES. [2023-08-04 08:32:53,137 INFO L83 FinitePrefix]: Finished finitePrefix Result has 893828 conditions, 386228 events. 298111/386228 cut-off events. For 112870/112870 co-relation queries the response was YES. Maximal size of possible extension queue 7961. Compared 2477099 event pairs, 239748 based on Foata normal form. 1/335930 useless extension candidates. Maximal degree in co-relation 893796. Up to 378150 conditions per place. [2023-08-04 08:32:54,363 INFO L140 encePairwiseOnDemand]: 975/979 looper letters, 81 selfloop transitions, 3 changer transitions 0/96 dead transitions. [2023-08-04 08:32:54,363 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 96 transitions, 479 flow [2023-08-04 08:32:54,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 08:32:54,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 08:32:54,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1772 transitions. [2023-08-04 08:32:54,365 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4525025536261491 [2023-08-04 08:32:54,365 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1772 transitions. [2023-08-04 08:32:54,365 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1772 transitions. [2023-08-04 08:32:54,366 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:32:54,366 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1772 transitions. [2023-08-04 08:32:54,368 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 443.0) internal successors, (1772), 4 states have internal predecessors, (1772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:32:54,370 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 979.0) internal successors, (4895), 5 states have internal predecessors, (4895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:32:54,370 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 979.0) internal successors, (4895), 5 states have internal predecessors, (4895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:32:54,370 INFO L175 Difference]: Start difference. First operand has 94 places, 95 transitions, 309 flow. Second operand 4 states and 1772 transitions. [2023-08-04 08:32:54,370 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 96 transitions, 479 flow [2023-08-04 08:32:59,201 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 96 transitions, 473 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-04 08:32:59,202 INFO L231 Difference]: Finished difference. Result has 96 places, 96 transitions, 317 flow [2023-08-04 08:32:59,202 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=979, PETRI_DIFFERENCE_MINUEND_FLOW=303, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=317, PETRI_PLACES=96, PETRI_TRANSITIONS=96} [2023-08-04 08:32:59,202 INFO L281 CegarLoopForPetriNet]: 78 programPoint places, 18 predicate places. [2023-08-04 08:32:59,202 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 96 transitions, 317 flow [2023-08-04 08:32:59,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 433.0) internal successors, (1732), 4 states have internal predecessors, (1732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:32:59,202 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:32:59,203 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:32:59,207 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-08-04 08:32:59,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:32:59,403 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:32:59,403 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:32:59,403 INFO L85 PathProgramCache]: Analyzing trace with hash 1949591694, now seen corresponding path program 1 times [2023-08-04 08:32:59,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:32:59,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805423394] [2023-08-04 08:32:59,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:32:59,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:32:59,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:32:59,461 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-04 08:32:59,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:32:59,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805423394] [2023-08-04 08:32:59,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805423394] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:32:59,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431825368] [2023-08-04 08:32:59,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:32:59,462 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:32:59,462 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:32:59,463 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:32:59,469 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-08-04 08:32:59,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:32:59,631 INFO L262 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 08:32:59,632 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:32:59,652 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-04 08:32:59,652 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:32:59,669 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-04 08:32:59,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [431825368] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:32:59,669 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:32:59,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 08:32:59,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639178971] [2023-08-04 08:32:59,669 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:32:59,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 08:32:59,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:32:59,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 08:32:59,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:32:59,682 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 429 out of 979 [2023-08-04 08:32:59,683 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 96 transitions, 317 flow. Second operand has 5 states, 5 states have (on average 437.2) internal successors, (2186), 5 states have internal predecessors, (2186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:32:59,683 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:32:59,683 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 429 of 979 [2023-08-04 08:32:59,683 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:33:24,518 INFO L124 PetriNetUnfolderBase]: 280697/363160 cut-off events. [2023-08-04 08:33:24,518 INFO L125 PetriNetUnfolderBase]: For 101483/101483 co-relation queries the response was YES. [2023-08-04 08:33:26,032 INFO L83 FinitePrefix]: Finished finitePrefix Result has 837910 conditions, 363160 events. 280697/363160 cut-off events. For 101483/101483 co-relation queries the response was YES. Maximal size of possible extension queue 7896. Compared 2304941 event pairs, 107130 based on Foata normal form. 10/315729 useless extension candidates. Maximal degree in co-relation 837877. Up to 354444 conditions per place. [2023-08-04 08:33:27,228 INFO L140 encePairwiseOnDemand]: 975/979 looper letters, 114 selfloop transitions, 3 changer transitions 1/130 dead transitions. [2023-08-04 08:33:27,229 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 130 transitions, 641 flow [2023-08-04 08:33:27,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 08:33:27,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 08:33:27,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1824 transitions. [2023-08-04 08:33:27,231 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46578140960163433 [2023-08-04 08:33:27,231 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1824 transitions. [2023-08-04 08:33:27,231 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1824 transitions. [2023-08-04 08:33:27,231 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:33:27,231 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1824 transitions. [2023-08-04 08:33:27,233 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 456.0) internal successors, (1824), 4 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:33:27,235 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 979.0) internal successors, (4895), 5 states have internal predecessors, (4895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:33:27,235 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 979.0) internal successors, (4895), 5 states have internal predecessors, (4895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:33:27,235 INFO L175 Difference]: Start difference. First operand has 96 places, 96 transitions, 317 flow. Second operand 4 states and 1824 transitions. [2023-08-04 08:33:27,235 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 130 transitions, 641 flow [2023-08-04 08:33:34,555 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 130 transitions, 635 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-04 08:33:34,556 INFO L231 Difference]: Finished difference. Result has 99 places, 96 transitions, 325 flow [2023-08-04 08:33:34,556 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=979, PETRI_DIFFERENCE_MINUEND_FLOW=311, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=325, PETRI_PLACES=99, PETRI_TRANSITIONS=96} [2023-08-04 08:33:34,557 INFO L281 CegarLoopForPetriNet]: 78 programPoint places, 21 predicate places. [2023-08-04 08:33:34,557 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 96 transitions, 325 flow [2023-08-04 08:33:34,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 437.2) internal successors, (2186), 5 states have internal predecessors, (2186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:33:34,557 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:33:34,557 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:33:34,562 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-08-04 08:33:34,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-08-04 08:33:34,758 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:33:34,758 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:33:34,758 INFO L85 PathProgramCache]: Analyzing trace with hash 387323559, now seen corresponding path program 1 times [2023-08-04 08:33:34,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:33:34,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636486477] [2023-08-04 08:33:34,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:33:34,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:33:34,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:33:34,796 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-08-04 08:33:34,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:33:34,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636486477] [2023-08-04 08:33:34,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636486477] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:33:34,796 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 08:33:34,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 08:33:34,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146021371] [2023-08-04 08:33:34,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:33:34,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:33:34,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:33:34,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:33:34,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 08:33:34,803 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 427 out of 979 [2023-08-04 08:33:34,804 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 96 transitions, 325 flow. Second operand has 3 states, 3 states have (on average 439.6666666666667) internal successors, (1319), 3 states have internal predecessors, (1319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:33:34,804 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:33:34,804 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 427 of 979 [2023-08-04 08:33:34,804 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:34:05,558 INFO L124 PetriNetUnfolderBase]: 308188/396351 cut-off events. [2023-08-04 08:34:05,558 INFO L125 PetriNetUnfolderBase]: For 119869/119869 co-relation queries the response was YES. [2023-08-04 08:34:07,180 INFO L83 FinitePrefix]: Finished finitePrefix Result has 917813 conditions, 396351 events. 308188/396351 cut-off events. For 119869/119869 co-relation queries the response was YES. Maximal size of possible extension queue 8523. Compared 2543995 event pairs, 178254 based on Foata normal form. 0/345949 useless extension candidates. Maximal degree in co-relation 917780. Up to 277309 conditions per place. [2023-08-04 08:34:08,333 INFO L140 encePairwiseOnDemand]: 975/979 looper letters, 137 selfloop transitions, 3 changer transitions 0/152 dead transitions. [2023-08-04 08:34:08,334 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 152 transitions, 794 flow [2023-08-04 08:34:08,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:34:08,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:34:08,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1407 transitions. [2023-08-04 08:34:08,336 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4790602655771195 [2023-08-04 08:34:08,336 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1407 transitions. [2023-08-04 08:34:08,336 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1407 transitions. [2023-08-04 08:34:08,336 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:34:08,336 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1407 transitions. [2023-08-04 08:34:08,337 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 469.0) internal successors, (1407), 3 states have internal predecessors, (1407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:34:08,339 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 979.0) internal successors, (3916), 4 states have internal predecessors, (3916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:34:08,340 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 979.0) internal successors, (3916), 4 states have internal predecessors, (3916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:34:08,340 INFO L175 Difference]: Start difference. First operand has 99 places, 96 transitions, 325 flow. Second operand 3 states and 1407 transitions. [2023-08-04 08:34:08,340 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 152 transitions, 794 flow [2023-08-04 08:34:13,696 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 152 transitions, 782 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-08-04 08:34:13,697 INFO L231 Difference]: Finished difference. Result has 100 places, 97 transitions, 334 flow [2023-08-04 08:34:13,697 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=979, PETRI_DIFFERENCE_MINUEND_FLOW=316, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=334, PETRI_PLACES=100, PETRI_TRANSITIONS=97} [2023-08-04 08:34:13,698 INFO L281 CegarLoopForPetriNet]: 78 programPoint places, 22 predicate places. [2023-08-04 08:34:13,698 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 97 transitions, 334 flow [2023-08-04 08:34:13,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 439.6666666666667) internal successors, (1319), 3 states have internal predecessors, (1319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:34:13,698 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:34:13,698 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:34:13,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2023-08-04 08:34:13,698 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:34:13,699 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:34:13,699 INFO L85 PathProgramCache]: Analyzing trace with hash 897466737, now seen corresponding path program 1 times [2023-08-04 08:34:13,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:34:13,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932407047] [2023-08-04 08:34:13,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:34:13,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:34:13,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:34:13,764 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 08:34:13,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:34:13,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932407047] [2023-08-04 08:34:13,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932407047] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:34:13,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422411068] [2023-08-04 08:34:13,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:34:13,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:34:13,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:34:13,769 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:34:13,773 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-08-04 08:34:13,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:34:13,919 INFO L262 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 08:34:13,920 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:34:13,940 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 08:34:13,940 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:34:13,962 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 08:34:13,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [422411068] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:34:13,963 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:34:13,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 08:34:13,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233986130] [2023-08-04 08:34:13,963 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:34:13,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 08:34:13,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:34:13,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 08:34:13,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:34:13,982 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 429 out of 979 [2023-08-04 08:34:13,983 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 97 transitions, 334 flow. Second operand has 5 states, 5 states have (on average 437.8) internal successors, (2189), 5 states have internal predecessors, (2189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:34:13,983 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:34:13,983 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 429 of 979 [2023-08-04 08:34:13,983 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:34:42,851 INFO L124 PetriNetUnfolderBase]: 300628/389520 cut-off events. [2023-08-04 08:34:42,852 INFO L125 PetriNetUnfolderBase]: For 173612/173612 co-relation queries the response was YES. [2023-08-04 08:34:44,576 INFO L83 FinitePrefix]: Finished finitePrefix Result has 951388 conditions, 389520 events. 300628/389520 cut-off events. For 173612/173612 co-relation queries the response was YES. Maximal size of possible extension queue 8290. Compared 2517997 event pairs, 96052 based on Foata normal form. 1000/355973 useless extension candidates. Maximal degree in co-relation 951355. Up to 268239 conditions per place. [2023-08-04 08:34:45,853 INFO L140 encePairwiseOnDemand]: 975/979 looper letters, 160 selfloop transitions, 3 changer transitions 1/176 dead transitions. [2023-08-04 08:34:45,853 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 176 transitions, 892 flow [2023-08-04 08:34:45,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 08:34:45,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 08:34:45,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1865 transitions. [2023-08-04 08:34:45,857 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47625127681307455 [2023-08-04 08:34:45,857 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1865 transitions. [2023-08-04 08:34:45,857 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1865 transitions. [2023-08-04 08:34:45,857 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:34:45,857 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1865 transitions. [2023-08-04 08:34:45,859 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 466.25) internal successors, (1865), 4 states have internal predecessors, (1865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:34:45,861 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 979.0) internal successors, (4895), 5 states have internal predecessors, (4895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:34:45,862 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 979.0) internal successors, (4895), 5 states have internal predecessors, (4895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:34:45,862 INFO L175 Difference]: Start difference. First operand has 100 places, 97 transitions, 334 flow. Second operand 4 states and 1865 transitions. [2023-08-04 08:34:45,862 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 176 transitions, 892 flow [2023-08-04 08:35:18,527 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 176 transitions, 874 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 08:35:18,529 INFO L231 Difference]: Finished difference. Result has 103 places, 97 transitions, 342 flow [2023-08-04 08:35:18,529 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=979, PETRI_DIFFERENCE_MINUEND_FLOW=328, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=342, PETRI_PLACES=103, PETRI_TRANSITIONS=97} [2023-08-04 08:35:18,529 INFO L281 CegarLoopForPetriNet]: 78 programPoint places, 25 predicate places. [2023-08-04 08:35:18,530 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 97 transitions, 342 flow [2023-08-04 08:35:18,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 437.8) internal successors, (2189), 5 states have internal predecessors, (2189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:35:18,530 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:35:18,530 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:35:18,536 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-08-04 08:35:18,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-08-04 08:35:18,734 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:35:18,734 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:35:18,734 INFO L85 PathProgramCache]: Analyzing trace with hash -1942662750, now seen corresponding path program 1 times [2023-08-04 08:35:18,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:35:18,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107904309] [2023-08-04 08:35:18,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:35:18,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:35:18,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:35:18,793 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-04 08:35:18,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:35:18,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107904309] [2023-08-04 08:35:18,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107904309] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:35:18,794 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 08:35:18,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 08:35:18,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508200138] [2023-08-04 08:35:18,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:35:18,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:35:18,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:35:18,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:35:18,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 08:35:18,801 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 427 out of 979 [2023-08-04 08:35:18,802 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 97 transitions, 342 flow. Second operand has 3 states, 3 states have (on average 440.0) internal successors, (1320), 3 states have internal predecessors, (1320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:35:18,802 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:35:18,802 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 427 of 979 [2023-08-04 08:35:18,802 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:35:48,369 INFO L124 PetriNetUnfolderBase]: 278272/359045 cut-off events. [2023-08-04 08:35:48,369 INFO L125 PetriNetUnfolderBase]: For 235796/235796 co-relation queries the response was YES. [2023-08-04 08:35:50,006 INFO L83 FinitePrefix]: Finished finitePrefix Result has 905255 conditions, 359045 events. 278272/359045 cut-off events. For 235796/235796 co-relation queries the response was YES. Maximal size of possible extension queue 7351. Compared 2263529 event pairs, 151984 based on Foata normal form. 0/320886 useless extension candidates. Maximal degree in co-relation 905221. Up to 237827 conditions per place. [2023-08-04 08:35:51,209 INFO L140 encePairwiseOnDemand]: 975/979 looper letters, 132 selfloop transitions, 3 changer transitions 0/147 dead transitions. [2023-08-04 08:35:51,209 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 147 transitions, 782 flow [2023-08-04 08:35:51,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:35:51,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:35:51,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1401 transitions. [2023-08-04 08:35:51,212 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4770173646578141 [2023-08-04 08:35:51,212 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1401 transitions. [2023-08-04 08:35:51,212 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1401 transitions. [2023-08-04 08:35:51,212 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:35:51,212 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1401 transitions. [2023-08-04 08:35:51,213 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 467.0) internal successors, (1401), 3 states have internal predecessors, (1401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:35:51,215 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 979.0) internal successors, (3916), 4 states have internal predecessors, (3916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:35:51,216 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 979.0) internal successors, (3916), 4 states have internal predecessors, (3916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:35:51,216 INFO L175 Difference]: Start difference. First operand has 103 places, 97 transitions, 342 flow. Second operand 3 states and 1401 transitions. [2023-08-04 08:35:51,216 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 147 transitions, 782 flow [2023-08-04 08:35:58,523 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 147 transitions, 770 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-08-04 08:35:58,524 INFO L231 Difference]: Finished difference. Result has 104 places, 98 transitions, 351 flow [2023-08-04 08:35:58,525 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=979, PETRI_DIFFERENCE_MINUEND_FLOW=333, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=351, PETRI_PLACES=104, PETRI_TRANSITIONS=98} [2023-08-04 08:35:58,525 INFO L281 CegarLoopForPetriNet]: 78 programPoint places, 26 predicate places. [2023-08-04 08:35:58,525 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 98 transitions, 351 flow [2023-08-04 08:35:58,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 440.0) internal successors, (1320), 3 states have internal predecessors, (1320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:35:58,526 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:35:58,526 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:35:58,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2023-08-04 08:35:58,526 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:35:58,526 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:35:58,526 INFO L85 PathProgramCache]: Analyzing trace with hash 1337920619, now seen corresponding path program 1 times [2023-08-04 08:35:58,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:35:58,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558906739] [2023-08-04 08:35:58,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:35:58,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:35:58,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:35:58,594 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-04 08:35:58,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:35:58,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558906739] [2023-08-04 08:35:58,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558906739] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:35:58,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423933017] [2023-08-04 08:35:58,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:35:58,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:35:58,595 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:35:58,596 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:35:58,601 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-08-04 08:35:58,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:35:58,751 INFO L262 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 08:35:58,752 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:35:58,772 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-04 08:35:58,772 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:35:58,787 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-04 08:35:58,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [423933017] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:35:58,787 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:35:58,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 08:35:58,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100747333] [2023-08-04 08:35:58,787 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:35:58,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 08:35:58,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:35:58,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 08:35:58,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:35:58,799 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 429 out of 979 [2023-08-04 08:35:58,801 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 98 transitions, 351 flow. Second operand has 5 states, 5 states have (on average 437.6) internal successors, (2188), 5 states have internal predecessors, (2188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:35:58,801 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:35:58,801 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 429 of 979 [2023-08-04 08:35:58,801 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:36:22,440 INFO L124 PetriNetUnfolderBase]: 243622/314015 cut-off events. [2023-08-04 08:36:22,441 INFO L125 PetriNetUnfolderBase]: For 221186/221186 co-relation queries the response was YES. [2023-08-04 08:36:24,110 INFO L83 FinitePrefix]: Finished finitePrefix Result has 809015 conditions, 314015 events. 243622/314015 cut-off events. For 221186/221186 co-relation queries the response was YES. Maximal size of possible extension queue 7020. Compared 1987459 event pairs, 80962 based on Foata normal form. 4300/295232 useless extension candidates. Maximal degree in co-relation 808981. Up to 137060 conditions per place. [2023-08-04 08:36:25,325 INFO L140 encePairwiseOnDemand]: 975/979 looper letters, 178 selfloop transitions, 4 changer transitions 0/194 dead transitions. [2023-08-04 08:36:25,326 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 194 transitions, 1007 flow [2023-08-04 08:36:25,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 08:36:25,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 08:36:25,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1880 transitions. [2023-08-04 08:36:25,330 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48008171603677224 [2023-08-04 08:36:25,330 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1880 transitions. [2023-08-04 08:36:25,330 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1880 transitions. [2023-08-04 08:36:25,331 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:36:25,331 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1880 transitions. [2023-08-04 08:36:25,333 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 470.0) internal successors, (1880), 4 states have internal predecessors, (1880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:36:25,336 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 979.0) internal successors, (4895), 5 states have internal predecessors, (4895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:36:25,336 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 979.0) internal successors, (4895), 5 states have internal predecessors, (4895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:36:25,336 INFO L175 Difference]: Start difference. First operand has 104 places, 98 transitions, 351 flow. Second operand 4 states and 1880 transitions. [2023-08-04 08:36:25,337 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 194 transitions, 1007 flow [2023-08-04 08:36:42,863 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 194 transitions, 989 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 08:36:42,865 INFO L231 Difference]: Finished difference. Result has 107 places, 99 transitions, 365 flow [2023-08-04 08:36:42,865 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=979, PETRI_DIFFERENCE_MINUEND_FLOW=345, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=365, PETRI_PLACES=107, PETRI_TRANSITIONS=99} [2023-08-04 08:36:42,866 INFO L281 CegarLoopForPetriNet]: 78 programPoint places, 29 predicate places. [2023-08-04 08:36:42,866 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 99 transitions, 365 flow [2023-08-04 08:36:42,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 437.6) internal successors, (2188), 5 states have internal predecessors, (2188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:36:42,866 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:36:42,866 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:36:42,871 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-08-04 08:36:43,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:36:43,067 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:36:43,067 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:36:43,067 INFO L85 PathProgramCache]: Analyzing trace with hash 348019905, now seen corresponding path program 1 times [2023-08-04 08:36:43,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:36:43,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122078951] [2023-08-04 08:36:43,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:36:43,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:36:43,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:36:43,145 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-08-04 08:36:43,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:36:43,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122078951] [2023-08-04 08:36:43,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122078951] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:36:43,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648924910] [2023-08-04 08:36:43,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:36:43,146 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:36:43,146 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:36:43,147 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:36:43,154 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-08-04 08:36:43,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:36:43,341 INFO L262 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 08:36:43,342 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:36:43,353 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-08-04 08:36:43,353 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:36:43,365 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-08-04 08:36:43,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [648924910] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:36:43,366 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:36:43,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 08:36:43,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978660668] [2023-08-04 08:36:43,367 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:36:43,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 08:36:43,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:36:43,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 08:36:43,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:36:43,379 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 429 out of 979 [2023-08-04 08:36:43,381 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 99 transitions, 365 flow. Second operand has 5 states, 5 states have (on average 439.0) internal successors, (2195), 5 states have internal predecessors, (2195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:36:43,381 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:36:43,381 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 429 of 979 [2023-08-04 08:36:43,381 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:37:12,786 INFO L124 PetriNetUnfolderBase]: 243577/313930 cut-off events. [2023-08-04 08:37:12,786 INFO L125 PetriNetUnfolderBase]: For 266943/266943 co-relation queries the response was YES. [2023-08-04 08:37:14,545 INFO L83 FinitePrefix]: Finished finitePrefix Result has 838568 conditions, 313930 events. 243577/313930 cut-off events. For 266943/266943 co-relation queries the response was YES. Maximal size of possible extension queue 7020. Compared 1950834 event pairs, 195805 based on Foata normal form. 42/285335 useless extension candidates. Maximal degree in co-relation 838533. Up to 302856 conditions per place. [2023-08-04 08:37:15,654 INFO L140 encePairwiseOnDemand]: 975/979 looper letters, 175 selfloop transitions, 3 changer transitions 5/195 dead transitions. [2023-08-04 08:37:15,654 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 195 transitions, 1011 flow [2023-08-04 08:37:15,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 08:37:15,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 08:37:15,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1880 transitions. [2023-08-04 08:37:15,657 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48008171603677224 [2023-08-04 08:37:15,657 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1880 transitions. [2023-08-04 08:37:15,657 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1880 transitions. [2023-08-04 08:37:15,657 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:37:15,657 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1880 transitions. [2023-08-04 08:37:15,659 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 470.0) internal successors, (1880), 4 states have internal predecessors, (1880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:37:15,661 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 979.0) internal successors, (4895), 5 states have internal predecessors, (4895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:37:15,661 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 979.0) internal successors, (4895), 5 states have internal predecessors, (4895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:37:15,661 INFO L175 Difference]: Start difference. First operand has 107 places, 99 transitions, 365 flow. Second operand 4 states and 1880 transitions. [2023-08-04 08:37:15,661 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 195 transitions, 1011 flow [2023-08-04 08:37:26,559 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 195 transitions, 1007 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-04 08:37:26,560 INFO L231 Difference]: Finished difference. Result has 111 places, 97 transitions, 367 flow [2023-08-04 08:37:26,561 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=979, PETRI_DIFFERENCE_MINUEND_FLOW=361, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=367, PETRI_PLACES=111, PETRI_TRANSITIONS=97} [2023-08-04 08:37:26,561 INFO L281 CegarLoopForPetriNet]: 78 programPoint places, 33 predicate places. [2023-08-04 08:37:26,561 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 97 transitions, 367 flow [2023-08-04 08:37:26,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 439.0) internal successors, (2195), 5 states have internal predecessors, (2195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:37:26,562 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:37:26,562 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:37:26,567 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-08-04 08:37:26,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:37:26,764 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:37:26,764 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:37:26,764 INFO L85 PathProgramCache]: Analyzing trace with hash 166390951, now seen corresponding path program 1 times [2023-08-04 08:37:26,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:37:26,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501128182] [2023-08-04 08:37:26,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:37:26,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:37:26,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:37:27,250 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-08-04 08:37:27,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:37:27,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501128182] [2023-08-04 08:37:27,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501128182] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:37:27,250 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 08:37:27,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-04 08:37:27,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937191155] [2023-08-04 08:37:27,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:37:27,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-04 08:37:27,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:37:27,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-04 08:37:27,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-08-04 08:37:27,530 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 417 out of 979 [2023-08-04 08:37:27,532 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 97 transitions, 367 flow. Second operand has 7 states, 7 states have (on average 424.7142857142857) internal successors, (2973), 7 states have internal predecessors, (2973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:37:27,532 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:37:27,533 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 417 of 979 [2023-08-04 08:37:27,533 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Received shutdown request... [2023-08-04 08:37:39,251 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 08:37:40,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 08:37:40,136 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-04 08:37:40,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2023-08-04 08:37:40,136 WARN L619 AbstractCegarLoop]: Verification canceled: while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (7states, 417/979 universal loopers) in iteration 17,while PetriNetUnfolder was constructing finite prefix that currently has 395796 conditions, 150176 events (117412/150175 cut-off events. For 134528/134528 co-relation queries the response was YES. Maximal size of possible extension queue 9583. Compared 1011943 event pairs, 59580 based on Foata normal form. 1563/151653 useless extension candidates. Maximal degree in co-relation 395774. Up to 89274 conditions per place.). [2023-08-04 08:37:40,137 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:37:40,137 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was TIMEOUT (1/2) [2023-08-04 08:37:40,138 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 2 thread instances [2023-08-04 08:37:40,138 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-04 08:37:40,141 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.08 08:37:40 BasicIcfg [2023-08-04 08:37:40,141 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-04 08:37:40,141 INFO L158 Benchmark]: Toolchain (without parser) took 656642.74ms. Allocated memory was 413.1MB in the beginning and 16.0GB in the end (delta: 15.6GB). Free memory was 374.5MB in the beginning and 11.1GB in the end (delta: -10.8GB). Peak memory consumption was 5.2GB. Max. memory is 16.0GB. [2023-08-04 08:37:40,141 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 343.9MB. Free memory is still 300.5MB. There was no memory consumed. Max. memory is 16.0GB. [2023-08-04 08:37:40,142 INFO L158 Benchmark]: CACSL2BoogieTranslator took 242.08ms. Allocated memory is still 413.1MB. Free memory was 374.5MB in the beginning and 362.1MB in the end (delta: 12.4MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. [2023-08-04 08:37:40,142 INFO L158 Benchmark]: Boogie Procedure Inliner took 48.32ms. Allocated memory is still 413.1MB. Free memory was 362.1MB in the beginning and 359.2MB in the end (delta: 2.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-04 08:37:40,142 INFO L158 Benchmark]: Boogie Preprocessor took 49.90ms. Allocated memory is still 413.1MB. Free memory was 359.2MB in the beginning and 357.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-04 08:37:40,142 INFO L158 Benchmark]: RCFGBuilder took 650.97ms. Allocated memory is still 413.1MB. Free memory was 356.4MB in the beginning and 329.1MB in the end (delta: 27.3MB). Peak memory consumption was 27.3MB. Max. memory is 16.0GB. [2023-08-04 08:37:40,143 INFO L158 Benchmark]: TraceAbstraction took 655646.06ms. Allocated memory was 413.1MB in the beginning and 16.0GB in the end (delta: 15.6GB). Free memory was 328.5MB in the beginning and 11.1GB in the end (delta: -10.8GB). Peak memory consumption was 5.1GB. Max. memory is 16.0GB. [2023-08-04 08:37:40,144 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 343.9MB. Free memory is still 300.5MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 242.08ms. Allocated memory is still 413.1MB. Free memory was 374.5MB in the beginning and 362.1MB in the end (delta: 12.4MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 48.32ms. Allocated memory is still 413.1MB. Free memory was 362.1MB in the beginning and 359.2MB in the end (delta: 2.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 49.90ms. Allocated memory is still 413.1MB. Free memory was 359.2MB in the beginning and 357.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 650.97ms. Allocated memory is still 413.1MB. Free memory was 356.4MB in the beginning and 329.1MB in the end (delta: 27.3MB). Peak memory consumption was 27.3MB. Max. memory is 16.0GB. * TraceAbstraction took 655646.06ms. Allocated memory was 413.1MB in the beginning and 16.0GB in the end (delta: 15.6GB). Free memory was 328.5MB in the beginning and 11.1GB in the end (delta: -10.8GB). Peak memory consumption was 5.1GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 11.9s, 342 PlacesBefore, 43 PlacesAfterwards, 373 TransitionsBefore, 50 TransitionsAfterwards, 15168 CoEnabledTransitionPairs, 10 FixpointIterations, 192 TrivialSequentialCompositions, 115 ConcurrentSequentialCompositions, 50 TrivialYvCompositions, 36 ConcurrentYvCompositions, 24 ChoiceCompositions, 417 TotalNumberOfCompositions, 24013 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 18106, independent: 17815, independent conditional: 0, independent unconditional: 17815, dependent: 291, dependent conditional: 0, dependent unconditional: 291, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 8882, independent: 8821, independent conditional: 0, independent unconditional: 8821, dependent: 61, dependent conditional: 0, dependent unconditional: 61, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 18106, independent: 8994, independent conditional: 0, independent unconditional: 8994, dependent: 230, dependent conditional: 0, dependent unconditional: 230, unknown: 8882, unknown conditional: 0, unknown unconditional: 8882] , Statistics on independence cache: Total cache size (in pairs): 327, Positive cache size: 307, Positive conditional cache size: 0, Positive unconditional cache size: 307, Negative cache size: 20, Negative conditional cache size: 0, Negative unconditional cache size: 20, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 10.1s, 342 PlacesBefore, 43 PlacesAfterwards, 373 TransitionsBefore, 50 TransitionsAfterwards, 15168 CoEnabledTransitionPairs, 9 FixpointIterations, 191 TrivialSequentialCompositions, 112 ConcurrentSequentialCompositions, 57 TrivialYvCompositions, 34 ConcurrentYvCompositions, 24 ChoiceCompositions, 418 TotalNumberOfCompositions, 22502 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 16820, independent: 16564, independent conditional: 0, independent unconditional: 16564, dependent: 256, dependent conditional: 0, dependent unconditional: 256, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 8623, independent: 8567, independent conditional: 0, independent unconditional: 8567, dependent: 56, dependent conditional: 0, dependent unconditional: 56, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 16820, independent: 7997, independent conditional: 0, independent unconditional: 7997, dependent: 200, dependent conditional: 0, dependent unconditional: 200, unknown: 8623, unknown conditional: 0, unknown unconditional: 8623] , Statistics on independence cache: Total cache size (in pairs): 295, Positive cache size: 278, Positive conditional cache size: 0, Positive unconditional cache size: 278, Negative cache size: 17, Negative conditional cache size: 0, Negative unconditional cache size: 17, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 11.3s, 436 PlacesBefore, 78 PlacesAfterwards, 475 TransitionsBefore, 92 TransitionsAfterwards, 50688 CoEnabledTransitionPairs, 9 FixpointIterations, 190 TrivialSequentialCompositions, 168 ConcurrentSequentialCompositions, 53 TrivialYvCompositions, 68 ConcurrentYvCompositions, 25 ChoiceCompositions, 504 TotalNumberOfCompositions, 111698 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 76830, independent: 76086, independent conditional: 0, independent unconditional: 76086, dependent: 744, dependent conditional: 0, dependent unconditional: 744, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 29375, independent: 29241, independent conditional: 0, independent unconditional: 29241, dependent: 134, dependent conditional: 0, dependent unconditional: 134, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 76830, independent: 46845, independent conditional: 0, independent unconditional: 46845, dependent: 610, dependent conditional: 0, dependent unconditional: 610, unknown: 29375, unknown conditional: 0, unknown unconditional: 29375] , Statistics on independence cache: Total cache size (in pairs): 1726, Positive cache size: 1681, Positive conditional cache size: 0, Positive unconditional cache size: 1681, Negative cache size: 45, Negative conditional cache size: 0, Negative unconditional cache size: 45, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - TimeoutResultAtElement [Line: 93]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (7states, 417/979 universal loopers) in iteration 17,while PetriNetUnfolder was constructing finite prefix that currently has 395796 conditions, 150176 events (117412/150175 cut-off events. For 134528/134528 co-relation queries the response was YES. Maximal size of possible extension queue 9583. Compared 1011943 event pairs, 59580 based on Foata normal form. 1563/151653 useless extension candidates. Maximal degree in co-relation 395774. Up to 89274 conditions per place.). - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 428 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 19.8s, OverallIterations: 11, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 2.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 12.2s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 715 SdHoareTripleChecker+Valid, 1.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 467 mSDsluCounter, 89 SdHoareTripleChecker+Invalid, 0.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 30 mSDsCounter, 46 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1323 IncrementalHoareTripleChecker+Invalid, 1369 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 46 mSolverCounterUnsat, 59 mSDtfsCounter, 1323 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 344 GetRequests, 305 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=195occurred in iteration=10, InterpolantAutomatonStates: 37, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 1.0s InterpolantComputationTime, 553 NumberOfCodeBlocks, 553 NumberOfCodeBlocksAsserted, 21 NumberOfCheckSat, 568 ConstructedInterpolants, 0 QuantifiedInterpolants, 754 SizeOfPredicates, 12 NumberOfNonLiveVariables, 2999 ConjunctsInSsa, 33 ConjunctsInUnsatCore, 22 InterpolantComputations, 10 PerfectInterpolantSequences, 80/92 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data with 2 thread instances CFG has 7 procedures, 518 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 624.2s, OverallIterations: 17, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 606.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 11.5s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 2106 SdHoareTripleChecker+Valid, 3.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1689 mSDsluCounter, 417 SdHoareTripleChecker+Invalid, 2.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 328 mSDsCounter, 79 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 4236 IncrementalHoareTripleChecker+Invalid, 4315 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 79 mSolverCounterUnsat, 89 mSDtfsCounter, 4236 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 764 GetRequests, 700 SyntacticMatches, 8 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=367occurred in iteration=16, InterpolantAutomatonStates: 55, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 1.4s InterpolantComputationTime, 1180 NumberOfCodeBlocks, 1180 NumberOfCodeBlocksAsserted, 30 NumberOfCheckSat, 1358 ConstructedInterpolants, 0 QuantifiedInterpolants, 2125 SizeOfPredicates, 12 NumberOfNonLiveVariables, 4218 ConjunctsInSsa, 42 ConjunctsInUnsatCore, 34 InterpolantComputations, 13 PerfectInterpolantSequences, 287/308 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data for thread instance sufficiency with 1 thread instances CFG has 5 procedures, 428 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 11.4s, OverallIterations: 5, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 10.2s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 432 SdHoareTripleChecker+Valid, 0.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 248 mSDsluCounter, 69 SdHoareTripleChecker+Invalid, 0.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 40 mSDsCounter, 20 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 530 IncrementalHoareTripleChecker+Invalid, 550 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 20 mSolverCounterUnsat, 29 mSDtfsCounter, 530 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=129occurred in iteration=4, InterpolantAutomatonStates: 15, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 60 NumberOfCodeBlocks, 60 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 42 ConstructedInterpolants, 0 QuantifiedInterpolants, 90 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 4 InterpolantComputations, 4 PerfectInterpolantSequences, 14/14 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown