/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.order.of.the.error.locations.to.be.checked INSUFFICIENT_FIRST -tc /storage/repos/CAV22/benchmarks/AutomizerCInline.xml -i /storage/repos/CAV22/benchmarks/increased_bounds/weaver_parallel-misc-1.wvr_bound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 02:26:28,234 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 02:26:28,300 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 02:26:28,304 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 02:26:28,304 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 02:26:28,304 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 02:26:28,305 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 02:26:28,328 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 02:26:28,329 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 02:26:28,332 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 02:26:28,332 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 02:26:28,332 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 02:26:28,333 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 02:26:28,334 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 02:26:28,335 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 02:26:28,335 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 02:26:28,335 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 02:26:28,335 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 02:26:28,336 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 02:26:28,336 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 02:26:28,336 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 02:26:28,336 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 02:26:28,337 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 02:26:28,337 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 02:26:28,337 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 02:26:28,338 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 02:26:28,338 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 02:26:28,339 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 02:26:28,339 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 02:26:28,339 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 02:26:28,340 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 02:26:28,340 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 02:26:28,340 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 02:26:28,341 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 02:26:28,341 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 02:26:28,341 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 02:26:28,341 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 02:26:28,341 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 02:26:28,341 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 02:26:28,342 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 02:26:28,342 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 02:26:28,342 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST [2023-08-04 02:26:28,574 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 02:26:28,596 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 02:26:28,599 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 02:26:28,600 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 02:26:28,600 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 02:26:28,601 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/weaver_parallel-misc-1.wvr_bound2.c [2023-08-04 02:26:29,678 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 02:26:29,812 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 02:26:29,812 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/weaver_parallel-misc-1.wvr_bound2.c [2023-08-04 02:26:29,818 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a20990eb1/117f31bba8e8478e8013baebce2b3067/FLAGf9f7add1a [2023-08-04 02:26:29,828 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a20990eb1/117f31bba8e8478e8013baebce2b3067 [2023-08-04 02:26:29,830 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 02:26:29,831 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 02:26:29,832 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 02:26:29,832 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 02:26:29,835 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 02:26:29,835 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 02:26:29" (1/1) ... [2023-08-04 02:26:29,836 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e251da5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:26:29, skipping insertion in model container [2023-08-04 02:26:29,836 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 02:26:29" (1/1) ... [2023-08-04 02:26:29,853 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 02:26:29,967 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_parallel-misc-1.wvr_bound2.c[2917,2930] [2023-08-04 02:26:29,972 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 02:26:29,978 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 02:26:29,994 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_parallel-misc-1.wvr_bound2.c[2917,2930] [2023-08-04 02:26:29,998 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 02:26:30,008 INFO L206 MainTranslator]: Completed translation [2023-08-04 02:26:30,008 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:26:30 WrapperNode [2023-08-04 02:26:30,008 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 02:26:30,009 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 02:26:30,009 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 02:26:30,009 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 02:26:30,013 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:26:30" (1/1) ... [2023-08-04 02:26:30,025 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:26:30" (1/1) ... [2023-08-04 02:26:30,047 INFO L138 Inliner]: procedures = 23, calls = 41, calls flagged for inlining = 17, calls inlined = 31, statements flattened = 319 [2023-08-04 02:26:30,047 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 02:26:30,048 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 02:26:30,048 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 02:26:30,048 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 02:26:30,055 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:26:30" (1/1) ... [2023-08-04 02:26:30,055 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:26:30" (1/1) ... [2023-08-04 02:26:30,058 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:26:30" (1/1) ... [2023-08-04 02:26:30,059 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:26:30" (1/1) ... [2023-08-04 02:26:30,066 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:26:30" (1/1) ... [2023-08-04 02:26:30,069 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:26:30" (1/1) ... [2023-08-04 02:26:30,071 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:26:30" (1/1) ... [2023-08-04 02:26:30,072 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:26:30" (1/1) ... [2023-08-04 02:26:30,075 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 02:26:30,076 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 02:26:30,076 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 02:26:30,076 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 02:26:30,077 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:26:30" (1/1) ... [2023-08-04 02:26:30,081 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 02:26:30,091 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:26:30,122 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-04 02:26:30,134 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-04 02:26:30,154 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 02:26:30,154 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-04 02:26:30,154 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-04 02:26:30,154 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-04 02:26:30,154 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-04 02:26:30,154 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 02:26:30,154 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 02:26:30,155 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 02:26:30,155 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-04 02:26:30,155 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 02:26:30,155 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 02:26:30,155 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 02:26:30,155 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 02:26:30,156 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-04 02:26:30,263 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 02:26:30,264 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 02:26:30,571 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 02:26:30,578 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 02:26:30,578 INFO L302 CfgBuilder]: Removed 7 assume(true) statements. [2023-08-04 02:26:30,580 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 02:26:30 BoogieIcfgContainer [2023-08-04 02:26:30,580 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 02:26:30,581 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 02:26:30,581 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 02:26:30,583 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 02:26:30,584 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 02:26:29" (1/3) ... [2023-08-04 02:26:30,584 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6959a6be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 02:26:30, skipping insertion in model container [2023-08-04 02:26:30,584 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:26:30" (2/3) ... [2023-08-04 02:26:30,584 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6959a6be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 02:26:30, skipping insertion in model container [2023-08-04 02:26:30,584 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 02:26:30" (3/3) ... [2023-08-04 02:26:30,585 INFO L112 eAbstractionObserver]: Analyzing ICFG weaver_parallel-misc-1.wvr_bound2.c [2023-08-04 02:26:30,591 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 02:26:30,597 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 02:26:30,598 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 02:26:30,598 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 02:26:30,681 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-04 02:26:30,713 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 345 places, 376 transitions, 774 flow [2023-08-04 02:26:30,884 INFO L124 PetriNetUnfolderBase]: 64/612 cut-off events. [2023-08-04 02:26:30,884 INFO L125 PetriNetUnfolderBase]: For 8/15 co-relation queries the response was YES. [2023-08-04 02:26:30,895 INFO L83 FinitePrefix]: Finished finitePrefix Result has 632 conditions, 612 events. 64/612 cut-off events. For 8/15 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 2650 event pairs, 0 based on Foata normal form. 0/537 useless extension candidates. Maximal degree in co-relation 310. Up to 8 conditions per place. [2023-08-04 02:26:30,896 INFO L82 GeneralOperation]: Start removeDead. Operand has 345 places, 376 transitions, 774 flow [2023-08-04 02:26:30,904 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 345 places, 376 transitions, 774 flow [2023-08-04 02:26:30,906 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 02:26:30,915 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 345 places, 376 transitions, 774 flow [2023-08-04 02:26:30,917 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 345 places, 376 transitions, 774 flow [2023-08-04 02:26:30,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 345 places, 376 transitions, 774 flow [2023-08-04 02:26:30,998 INFO L124 PetriNetUnfolderBase]: 64/612 cut-off events. [2023-08-04 02:26:30,998 INFO L125 PetriNetUnfolderBase]: For 8/15 co-relation queries the response was YES. [2023-08-04 02:26:31,003 INFO L83 FinitePrefix]: Finished finitePrefix Result has 632 conditions, 612 events. 64/612 cut-off events. For 8/15 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 2650 event pairs, 0 based on Foata normal form. 0/537 useless extension candidates. Maximal degree in co-relation 310. Up to 8 conditions per place. [2023-08-04 02:26:31,026 INFO L119 LiptonReduction]: Number of co-enabled transitions 45792 [2023-08-04 02:26:39,859 INFO L134 LiptonReduction]: Checked pairs total: 45312 [2023-08-04 02:26:39,860 INFO L136 LiptonReduction]: Total number of compositions: 435 [2023-08-04 02:26:39,874 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 02:26:39,878 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;@16d16054, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 02:26:39,878 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-04 02:26:39,889 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 02:26:39,889 INFO L124 PetriNetUnfolderBase]: 6/33 cut-off events. [2023-08-04 02:26:39,889 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 02:26:39,889 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:26:39,890 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2023-08-04 02:26:39,890 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 02:26:39,894 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:26:39,894 INFO L85 PathProgramCache]: Analyzing trace with hash 1740771439, now seen corresponding path program 1 times [2023-08-04 02:26:39,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:26:39,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268383458] [2023-08-04 02:26:39,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:26:39,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:26:40,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 02:26:40,001 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 02:26:40,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 02:26:40,051 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 02:26:40,052 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 02:26:40,053 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-04 02:26:40,055 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-04 02:26:40,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 02:26:40,056 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-04 02:26:40,058 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN (1/2) [2023-08-04 02:26:40,058 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 02:26:40,058 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 02:26:40,107 INFO L144 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2023-08-04 02:26:40,116 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 541 places, 594 transitions, 1236 flow [2023-08-04 02:26:40,457 INFO L124 PetriNetUnfolderBase]: 210/1667 cut-off events. [2023-08-04 02:26:40,457 INFO L125 PetriNetUnfolderBase]: For 72/113 co-relation queries the response was YES. [2023-08-04 02:26:40,500 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1764 conditions, 1667 events. 210/1667 cut-off events. For 72/113 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 11437 event pairs, 1 based on Foata normal form. 0/1445 useless extension candidates. Maximal degree in co-relation 1040. Up to 32 conditions per place. [2023-08-04 02:26:40,501 INFO L82 GeneralOperation]: Start removeDead. Operand has 541 places, 594 transitions, 1236 flow [2023-08-04 02:26:40,515 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 541 places, 594 transitions, 1236 flow [2023-08-04 02:26:40,516 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 02:26:40,516 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 541 places, 594 transitions, 1236 flow [2023-08-04 02:26:40,516 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 541 places, 594 transitions, 1236 flow [2023-08-04 02:26:40,516 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 541 places, 594 transitions, 1236 flow [2023-08-04 02:26:40,863 INFO L124 PetriNetUnfolderBase]: 210/1667 cut-off events. [2023-08-04 02:26:40,864 INFO L125 PetriNetUnfolderBase]: For 72/113 co-relation queries the response was YES. [2023-08-04 02:26:40,910 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1764 conditions, 1667 events. 210/1667 cut-off events. For 72/113 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 11437 event pairs, 1 based on Foata normal form. 0/1445 useless extension candidates. Maximal degree in co-relation 1040. Up to 32 conditions per place. [2023-08-04 02:26:41,004 INFO L119 LiptonReduction]: Number of co-enabled transitions 185712 [2023-08-04 02:26:50,647 INFO L134 LiptonReduction]: Checked pairs total: 296771 [2023-08-04 02:26:50,648 INFO L136 LiptonReduction]: Total number of compositions: 664 [2023-08-04 02:26:50,649 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 02:26:50,650 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;@16d16054, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 02:26:50,650 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-04 02:26:50,657 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 02:26:50,658 INFO L124 PetriNetUnfolderBase]: 13/118 cut-off events. [2023-08-04 02:26:50,658 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2023-08-04 02:26:50,658 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:26:50,658 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1] [2023-08-04 02:26:50,658 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 02:26:50,658 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:26:50,659 INFO L85 PathProgramCache]: Analyzing trace with hash 1822076194, now seen corresponding path program 1 times [2023-08-04 02:26:50,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:26:50,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185339945] [2023-08-04 02:26:50,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:26:50,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:26:50,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:26:50,797 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 02:26:50,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:26:50,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185339945] [2023-08-04 02:26:50,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185339945] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:26:50,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108891993] [2023-08-04 02:26:50,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:26:50,798 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:26:50,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:26:50,801 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 02:26:50,833 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-04 02:26:50,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:26:50,901 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 02:26:50,903 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:26:50,936 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 02:26:50,937 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 02:26:50,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [108891993] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:26:50,937 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 02:26:50,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-04 02:26:50,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278914112] [2023-08-04 02:26:50,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:26:50,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 02:26:50,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:26:50,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 02:26:50,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 02:26:50,991 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 531 out of 1258 [2023-08-04 02:26:50,997 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 104 transitions, 256 flow. Second operand has 5 states, 5 states have (on average 532.8) internal successors, (2664), 5 states have internal predecessors, (2664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:26:50,998 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:26:50,998 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 531 of 1258 [2023-08-04 02:26:50,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:27:49,995 INFO L124 PetriNetUnfolderBase]: 710193/909899 cut-off events. [2023-08-04 02:27:49,996 INFO L125 PetriNetUnfolderBase]: For 38638/38638 co-relation queries the response was YES. [2023-08-04 02:27:52,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1807603 conditions, 909899 events. 710193/909899 cut-off events. For 38638/38638 co-relation queries the response was YES. Maximal size of possible extension queue 29711. Compared 6536657 event pairs, 288632 based on Foata normal form. 59570/843267 useless extension candidates. Maximal degree in co-relation 216043. Up to 875854 conditions per place. [2023-08-04 02:27:53,789 INFO L140 encePairwiseOnDemand]: 1247/1258 looper letters, 95 selfloop transitions, 5 changer transitions 16/136 dead transitions. [2023-08-04 02:27:53,789 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 136 transitions, 544 flow [2023-08-04 02:27:53,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 02:27:53,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 02:27:53,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 2781 transitions. [2023-08-04 02:27:53,804 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4421303656597774 [2023-08-04 02:27:53,805 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 2781 transitions. [2023-08-04 02:27:53,805 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 2781 transitions. [2023-08-04 02:27:53,808 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:27:53,809 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 2781 transitions. [2023-08-04 02:27:53,815 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 556.2) internal successors, (2781), 5 states have internal predecessors, (2781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:27:53,824 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 1258.0) internal successors, (7548), 6 states have internal predecessors, (7548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:27:53,827 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 1258.0) internal successors, (7548), 6 states have internal predecessors, (7548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:27:53,828 INFO L175 Difference]: Start difference. First operand has 90 places, 104 transitions, 256 flow. Second operand 5 states and 2781 transitions. [2023-08-04 02:27:53,829 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 136 transitions, 544 flow [2023-08-04 02:27:53,850 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 136 transitions, 538 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 02:27:53,852 INFO L231 Difference]: Finished difference. Result has 91 places, 83 transitions, 201 flow [2023-08-04 02:27:53,853 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1258, PETRI_DIFFERENCE_MINUEND_FLOW=230, PETRI_DIFFERENCE_MINUEND_PLACES=86, 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=5, PETRI_FLOW=201, PETRI_PLACES=91, PETRI_TRANSITIONS=83} [2023-08-04 02:27:53,855 INFO L281 CegarLoopForPetriNet]: 90 programPoint places, 1 predicate places. [2023-08-04 02:27:53,855 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 83 transitions, 201 flow [2023-08-04 02:27:53,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 532.8) internal successors, (2664), 5 states have internal predecessors, (2664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:27:53,857 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:27:53,857 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2023-08-04 02:27:53,866 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-04 02:27:54,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:27:54,067 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 02:27:54,067 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:27:54,068 INFO L85 PathProgramCache]: Analyzing trace with hash -932492658, now seen corresponding path program 1 times [2023-08-04 02:27:54,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:27:54,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954247894] [2023-08-04 02:27:54,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:27:54,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:27:54,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:27:54,161 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 02:27:54,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:27:54,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954247894] [2023-08-04 02:27:54,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954247894] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:27:54,162 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 02:27:54,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 02:27:54,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701337978] [2023-08-04 02:27:54,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:27:54,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 02:27:54,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:27:54,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 02:27:54,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 02:27:54,172 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 532 out of 1258 [2023-08-04 02:27:54,174 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 83 transitions, 201 flow. Second operand has 3 states, 3 states have (on average 534.3333333333334) internal successors, (1603), 3 states have internal predecessors, (1603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:27:54,174 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:27:54,174 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 532 of 1258 [2023-08-04 02:27:54,174 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:28:15,662 INFO L124 PetriNetUnfolderBase]: 294148/375028 cut-off events. [2023-08-04 02:28:15,662 INFO L125 PetriNetUnfolderBase]: For 5269/5269 co-relation queries the response was YES. [2023-08-04 02:28:16,492 INFO L83 FinitePrefix]: Finished finitePrefix Result has 744419 conditions, 375028 events. 294148/375028 cut-off events. For 5269/5269 co-relation queries the response was YES. Maximal size of possible extension queue 12818. Compared 2446134 event pairs, 178596 based on Foata normal form. 1/328162 useless extension candidates. Maximal degree in co-relation 74706. Up to 363217 conditions per place. [2023-08-04 02:28:17,474 INFO L140 encePairwiseOnDemand]: 1255/1258 looper letters, 73 selfloop transitions, 2 changer transitions 0/95 dead transitions. [2023-08-04 02:28:17,474 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 95 transitions, 374 flow [2023-08-04 02:28:17,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 02:28:17,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 02:28:17,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1671 transitions. [2023-08-04 02:28:17,493 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44276629570747217 [2023-08-04 02:28:17,493 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1671 transitions. [2023-08-04 02:28:17,493 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1671 transitions. [2023-08-04 02:28:17,494 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:28:17,494 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1671 transitions. [2023-08-04 02:28:17,497 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 557.0) internal successors, (1671), 3 states have internal predecessors, (1671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:28:17,503 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1258.0) internal successors, (5032), 4 states have internal predecessors, (5032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:28:17,505 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1258.0) internal successors, (5032), 4 states have internal predecessors, (5032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:28:17,505 INFO L175 Difference]: Start difference. First operand has 91 places, 83 transitions, 201 flow. Second operand 3 states and 1671 transitions. [2023-08-04 02:28:17,506 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 95 transitions, 374 flow [2023-08-04 02:28:17,512 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 95 transitions, 371 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-04 02:28:17,515 INFO L231 Difference]: Finished difference. Result has 84 places, 82 transitions, 197 flow [2023-08-04 02:28:17,515 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1258, PETRI_DIFFERENCE_MINUEND_FLOW=193, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=197, PETRI_PLACES=84, PETRI_TRANSITIONS=82} [2023-08-04 02:28:17,516 INFO L281 CegarLoopForPetriNet]: 90 programPoint places, -6 predicate places. [2023-08-04 02:28:17,516 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 82 transitions, 197 flow [2023-08-04 02:28:17,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 534.3333333333334) internal successors, (1603), 3 states have internal predecessors, (1603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:28:17,517 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:28:17,517 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:28:17,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-04 02:28:17,518 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 02:28:17,518 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:28:17,518 INFO L85 PathProgramCache]: Analyzing trace with hash -537621273, now seen corresponding path program 1 times [2023-08-04 02:28:17,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:28:17,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347547543] [2023-08-04 02:28:17,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:28:17,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:28:17,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:28:17,588 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 02:28:17,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:28:17,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347547543] [2023-08-04 02:28:17,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347547543] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:28:17,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338087485] [2023-08-04 02:28:17,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:28:17,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:28:17,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:28:17,591 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 02:28:17,593 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-04 02:28:17,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:28:17,657 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 02:28:17,658 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:28:17,669 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 02:28:17,669 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 02:28:17,683 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 02:28:17,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1338087485] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 02:28:17,684 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 02:28:17,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 02:28:17,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235600180] [2023-08-04 02:28:17,684 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 02:28:17,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 02:28:17,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:28:17,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 02:28:17,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 02:28:17,698 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 531 out of 1258 [2023-08-04 02:28:17,701 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 82 transitions, 197 flow. Second operand has 5 states, 5 states have (on average 533.8) internal successors, (2669), 5 states have internal predecessors, (2669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:28:17,701 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:28:17,701 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 531 of 1258 [2023-08-04 02:28:17,701 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:28:38,022 INFO L124 PetriNetUnfolderBase]: 276391/351243 cut-off events. [2023-08-04 02:28:38,022 INFO L125 PetriNetUnfolderBase]: For 3703/3703 co-relation queries the response was YES. [2023-08-04 02:28:38,885 INFO L83 FinitePrefix]: Finished finitePrefix Result has 696102 conditions, 351243 events. 276391/351243 cut-off events. For 3703/3703 co-relation queries the response was YES. Maximal size of possible extension queue 12660. Compared 2258472 event pairs, 105729 based on Foata normal form. 11/307695 useless extension candidates. Maximal degree in co-relation 584466. Up to 339012 conditions per place. [2023-08-04 02:28:39,786 INFO L140 encePairwiseOnDemand]: 1255/1258 looper letters, 95 selfloop transitions, 3 changer transitions 0/118 dead transitions. [2023-08-04 02:28:39,787 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 118 transitions, 464 flow [2023-08-04 02:28:39,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 02:28:39,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 02:28:39,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 2223 transitions. [2023-08-04 02:28:39,791 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4417726550079491 [2023-08-04 02:28:39,791 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 2223 transitions. [2023-08-04 02:28:39,791 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 2223 transitions. [2023-08-04 02:28:39,792 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:28:39,792 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 2223 transitions. [2023-08-04 02:28:39,795 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 555.75) internal successors, (2223), 4 states have internal predecessors, (2223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:28:39,801 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 1258.0) internal successors, (6290), 5 states have internal predecessors, (6290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:28:39,802 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 1258.0) internal successors, (6290), 5 states have internal predecessors, (6290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:28:39,802 INFO L175 Difference]: Start difference. First operand has 84 places, 82 transitions, 197 flow. Second operand 4 states and 2223 transitions. [2023-08-04 02:28:39,803 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 118 transitions, 464 flow [2023-08-04 02:28:39,804 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 118 transitions, 460 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 02:28:39,806 INFO L231 Difference]: Finished difference. Result has 85 places, 81 transitions, 194 flow [2023-08-04 02:28:39,806 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1258, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=194, PETRI_PLACES=85, PETRI_TRANSITIONS=81} [2023-08-04 02:28:39,808 INFO L281 CegarLoopForPetriNet]: 90 programPoint places, -5 predicate places. [2023-08-04 02:28:39,808 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 81 transitions, 194 flow [2023-08-04 02:28:39,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 533.8) internal successors, (2669), 5 states have internal predecessors, (2669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:28:39,809 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:28:39,809 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:28:39,817 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-04 02:28:40,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-08-04 02:28:40,014 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 02:28:40,014 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:28:40,014 INFO L85 PathProgramCache]: Analyzing trace with hash -1815034785, now seen corresponding path program 1 times [2023-08-04 02:28:40,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:28:40,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380749934] [2023-08-04 02:28:40,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:28:40,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:28:40,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:28:40,086 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 02:28:40,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:28:40,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380749934] [2023-08-04 02:28:40,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380749934] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:28:40,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202552236] [2023-08-04 02:28:40,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:28:40,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:28:40,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:28:40,088 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 02:28:40,091 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-04 02:28:40,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:28:40,174 INFO L262 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 02:28:40,175 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:28:40,192 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 02:28:40,192 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 02:28:40,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [202552236] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:28:40,192 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 02:28:40,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-04 02:28:40,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343381519] [2023-08-04 02:28:40,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:28:40,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 02:28:40,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:28:40,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 02:28:40,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 02:28:40,207 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 531 out of 1258 [2023-08-04 02:28:40,212 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 81 transitions, 194 flow. Second operand has 5 states, 5 states have (on average 533.8) internal successors, (2669), 5 states have internal predecessors, (2669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:28:40,212 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:28:40,212 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 531 of 1258 [2023-08-04 02:28:40,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:28:55,095 INFO L124 PetriNetUnfolderBase]: 206816/266677 cut-off events. [2023-08-04 02:28:55,095 INFO L125 PetriNetUnfolderBase]: For 2217/2217 co-relation queries the response was YES. [2023-08-04 02:28:55,676 INFO L83 FinitePrefix]: Finished finitePrefix Result has 527925 conditions, 266677 events. 206816/266677 cut-off events. For 2217/2217 co-relation queries the response was YES. Maximal size of possible extension queue 9695. Compared 1743149 event pairs, 12329 based on Foata normal form. 0/245129 useless extension candidates. Maximal degree in co-relation 386448. Up to 171479 conditions per place. [2023-08-04 02:28:55,825 INFO L140 encePairwiseOnDemand]: 1254/1258 looper letters, 0 selfloop transitions, 0 changer transitions 190/190 dead transitions. [2023-08-04 02:28:55,826 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 190 transitions, 752 flow [2023-08-04 02:28:55,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 02:28:55,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 02:28:55,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 2826 transitions. [2023-08-04 02:28:55,830 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4492845786963434 [2023-08-04 02:28:55,830 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 2826 transitions. [2023-08-04 02:28:55,830 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 2826 transitions. [2023-08-04 02:28:55,832 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:28:55,832 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 2826 transitions. [2023-08-04 02:28:55,836 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 565.2) internal successors, (2826), 5 states have internal predecessors, (2826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:28:55,842 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 1258.0) internal successors, (7548), 6 states have internal predecessors, (7548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:28:55,843 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 1258.0) internal successors, (7548), 6 states have internal predecessors, (7548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:28:55,843 INFO L175 Difference]: Start difference. First operand has 85 places, 81 transitions, 194 flow. Second operand 5 states and 2826 transitions. [2023-08-04 02:28:55,843 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 190 transitions, 752 flow [2023-08-04 02:28:56,148 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 190 transitions, 745 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-04 02:28:56,149 INFO L231 Difference]: Finished difference. Result has 84 places, 0 transitions, 0 flow [2023-08-04 02:28:56,149 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1258, PETRI_DIFFERENCE_MINUEND_FLOW=183, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=0, PETRI_PLACES=84, PETRI_TRANSITIONS=0} [2023-08-04 02:28:56,149 INFO L281 CegarLoopForPetriNet]: 90 programPoint places, -6 predicate places. [2023-08-04 02:28:56,149 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 0 transitions, 0 flow [2023-08-04 02:28:56,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 533.8) internal successors, (2669), 5 states have internal predecessors, (2669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:28:56,150 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-04 02:28:56,150 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-04 02:28:56,157 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-08-04 02:28:56,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:28:56,354 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-08-04 02:28:56,355 INFO L307 ceAbstractionStarter]: Result for error location InUseError was SAFE,SAFE (1/2) [2023-08-04 02:28:56,359 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 541 places, 594 transitions, 1236 flow [2023-08-04 02:28:56,598 INFO L124 PetriNetUnfolderBase]: 210/1667 cut-off events. [2023-08-04 02:28:56,598 INFO L125 PetriNetUnfolderBase]: For 72/113 co-relation queries the response was YES. [2023-08-04 02:28:56,638 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1764 conditions, 1667 events. 210/1667 cut-off events. For 72/113 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 11437 event pairs, 1 based on Foata normal form. 0/1445 useless extension candidates. Maximal degree in co-relation 1040. Up to 32 conditions per place. [2023-08-04 02:28:56,638 INFO L82 GeneralOperation]: Start removeDead. Operand has 541 places, 594 transitions, 1236 flow [2023-08-04 02:28:56,648 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 541 places, 594 transitions, 1236 flow [2023-08-04 02:28:56,648 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 02:28:56,648 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 541 places, 594 transitions, 1236 flow [2023-08-04 02:28:56,649 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 541 places, 594 transitions, 1236 flow [2023-08-04 02:28:56,649 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 541 places, 594 transitions, 1236 flow [2023-08-04 02:28:57,026 INFO L124 PetriNetUnfolderBase]: 210/1667 cut-off events. [2023-08-04 02:28:57,027 INFO L125 PetriNetUnfolderBase]: For 72/113 co-relation queries the response was YES. [2023-08-04 02:28:57,053 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1764 conditions, 1667 events. 210/1667 cut-off events. For 72/113 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 11437 event pairs, 1 based on Foata normal form. 0/1445 useless extension candidates. Maximal degree in co-relation 1040. Up to 32 conditions per place. [2023-08-04 02:28:57,123 INFO L119 LiptonReduction]: Number of co-enabled transitions 185712 [2023-08-04 02:29:06,412 INFO L134 LiptonReduction]: Checked pairs total: 308911 [2023-08-04 02:29:06,412 INFO L136 LiptonReduction]: Total number of compositions: 663 [2023-08-04 02:29:06,413 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 02:29:06,414 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;@16d16054, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 02:29:06,414 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 02:29:06,416 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 02:29:06,416 INFO L124 PetriNetUnfolderBase]: 1/17 cut-off events. [2023-08-04 02:29:06,416 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 02:29:06,416 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:29:06,416 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-04 02:29:06,416 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:29:06,416 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:29:06,416 INFO L85 PathProgramCache]: Analyzing trace with hash -1650396606, now seen corresponding path program 1 times [2023-08-04 02:29:06,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:29:06,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907193492] [2023-08-04 02:29:06,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:29:06,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:29:06,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:29:06,439 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 02:29:06,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:29:06,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907193492] [2023-08-04 02:29:06,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907193492] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:29:06,440 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 02:29:06,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 02:29:06,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958472440] [2023-08-04 02:29:06,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:29:06,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 02:29:06,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:29:06,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 02:29:06,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 02:29:06,461 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 532 out of 1257 [2023-08-04 02:29:06,462 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 106 transitions, 260 flow. Second operand has 3 states, 3 states have (on average 534.0) internal successors, (1602), 3 states have internal predecessors, (1602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:29:06,462 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:29:06,462 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 532 of 1257 [2023-08-04 02:29:06,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:30:04,363 INFO L124 PetriNetUnfolderBase]: 709167/905381 cut-off events. [2023-08-04 02:30:04,363 INFO L125 PetriNetUnfolderBase]: For 40607/40607 co-relation queries the response was YES. [2023-08-04 02:30:06,657 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1801286 conditions, 905381 events. 709167/905381 cut-off events. For 40607/40607 co-relation queries the response was YES. Maximal size of possible extension queue 29229. Compared 6351267 event pairs, 560900 based on Foata normal form. 59520/838815 useless extension candidates. Maximal degree in co-relation 1156912. Up to 875294 conditions per place. [2023-08-04 02:30:09,598 INFO L140 encePairwiseOnDemand]: 1245/1257 looper letters, 86 selfloop transitions, 2 changer transitions 2/111 dead transitions. [2023-08-04 02:30:09,598 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 111 transitions, 446 flow [2023-08-04 02:30:09,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 02:30:09,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 02:30:09,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1696 transitions. [2023-08-04 02:30:09,601 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4497480774330416 [2023-08-04 02:30:09,601 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1696 transitions. [2023-08-04 02:30:09,601 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1696 transitions. [2023-08-04 02:30:09,602 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:30:09,602 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1696 transitions. [2023-08-04 02:30:09,604 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 565.3333333333334) internal successors, (1696), 3 states have internal predecessors, (1696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:30:09,607 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1257.0) internal successors, (5028), 4 states have internal predecessors, (5028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:30:09,608 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1257.0) internal successors, (5028), 4 states have internal predecessors, (5028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:30:09,608 INFO L175 Difference]: Start difference. First operand has 90 places, 106 transitions, 260 flow. Second operand 3 states and 1696 transitions. [2023-08-04 02:30:09,608 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 111 transitions, 446 flow [2023-08-04 02:30:09,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 111 transitions, 446 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 02:30:09,631 INFO L231 Difference]: Finished difference. Result has 92 places, 96 transitions, 242 flow [2023-08-04 02:30:09,631 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1257, PETRI_DIFFERENCE_MINUEND_FLOW=242, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=242, PETRI_PLACES=92, PETRI_TRANSITIONS=96} [2023-08-04 02:30:09,632 INFO L281 CegarLoopForPetriNet]: 90 programPoint places, 2 predicate places. [2023-08-04 02:30:09,632 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 96 transitions, 242 flow [2023-08-04 02:30:09,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 534.0) internal successors, (1602), 3 states have internal predecessors, (1602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:30:09,632 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:30:09,633 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:30:09,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-04 02:30:09,633 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:30:09,633 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:30:09,633 INFO L85 PathProgramCache]: Analyzing trace with hash -156329918, now seen corresponding path program 1 times [2023-08-04 02:30:09,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:30:09,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761158348] [2023-08-04 02:30:09,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:30:09,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:30:09,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:30:09,674 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 02:30:09,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:30:09,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761158348] [2023-08-04 02:30:09,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761158348] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:30:09,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074082490] [2023-08-04 02:30:09,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:30:09,674 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:30:09,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:30:09,676 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 02:30:09,678 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-04 02:30:09,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:30:09,740 INFO L262 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 02:30:09,740 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:30:09,745 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 02:30:09,745 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 02:30:09,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2074082490] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:30:09,746 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 02:30:09,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 02:30:09,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342871350] [2023-08-04 02:30:09,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:30:09,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 02:30:09,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:30:09,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 02:30:09,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 02:30:09,753 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 532 out of 1257 [2023-08-04 02:30:09,754 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 96 transitions, 242 flow. Second operand has 3 states, 3 states have (on average 535.0) internal successors, (1605), 3 states have internal predecessors, (1605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:30:09,754 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:30:09,754 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 532 of 1257 [2023-08-04 02:30:09,755 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:31:05,110 INFO L124 PetriNetUnfolderBase]: 706261/904674 cut-off events. [2023-08-04 02:31:05,110 INFO L125 PetriNetUnfolderBase]: For 34886/34886 co-relation queries the response was YES. [2023-08-04 02:31:07,514 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1799477 conditions, 904674 events. 706261/904674 cut-off events. For 34886/34886 co-relation queries the response was YES. Maximal size of possible extension queue 29437. Compared 6411625 event pairs, 436584 based on Foata normal form. 0/776817 useless extension candidates. Maximal degree in co-relation 1234441. Up to 869741 conditions per place. [2023-08-04 02:31:10,637 INFO L140 encePairwiseOnDemand]: 1254/1257 looper letters, 110 selfloop transitions, 2 changer transitions 0/133 dead transitions. [2023-08-04 02:31:10,637 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 133 transitions, 540 flow [2023-08-04 02:31:10,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 02:31:10,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 02:31:10,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1708 transitions. [2023-08-04 02:31:10,641 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45293025722619995 [2023-08-04 02:31:10,641 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1708 transitions. [2023-08-04 02:31:10,641 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1708 transitions. [2023-08-04 02:31:10,642 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:31:10,642 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1708 transitions. [2023-08-04 02:31:10,645 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 569.3333333333334) internal successors, (1708), 3 states have internal predecessors, (1708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:31:10,650 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1257.0) internal successors, (5028), 4 states have internal predecessors, (5028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:31:10,651 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1257.0) internal successors, (5028), 4 states have internal predecessors, (5028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:31:10,651 INFO L175 Difference]: Start difference. First operand has 92 places, 96 transitions, 242 flow. Second operand 3 states and 1708 transitions. [2023-08-04 02:31:10,651 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 133 transitions, 540 flow [2023-08-04 02:31:10,775 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 133 transitions, 532 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-04 02:31:10,776 INFO L231 Difference]: Finished difference. Result has 90 places, 97 transitions, 246 flow [2023-08-04 02:31:10,777 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1257, PETRI_DIFFERENCE_MINUEND_FLOW=234, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=246, PETRI_PLACES=90, PETRI_TRANSITIONS=97} [2023-08-04 02:31:10,778 INFO L281 CegarLoopForPetriNet]: 90 programPoint places, 0 predicate places. [2023-08-04 02:31:10,778 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 97 transitions, 246 flow [2023-08-04 02:31:10,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 535.0) internal successors, (1605), 3 states have internal predecessors, (1605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:31:10,779 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:31:10,779 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:31:10,785 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-08-04 02:31:10,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:31:10,985 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:31:10,985 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:31:10,985 INFO L85 PathProgramCache]: Analyzing trace with hash 1912284836, now seen corresponding path program 1 times [2023-08-04 02:31:10,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:31:10,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226691574] [2023-08-04 02:31:10,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:31:10,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:31:10,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:31:11,024 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 02:31:11,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:31:11,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226691574] [2023-08-04 02:31:11,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226691574] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:31:11,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814783392] [2023-08-04 02:31:11,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:31:11,024 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:31:11,024 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:31:11,026 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 02:31:11,028 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-04 02:31:11,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:31:11,098 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 02:31:11,099 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:31:11,106 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 02:31:11,106 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 02:31:11,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1814783392] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:31:11,106 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 02:31:11,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 02:31:11,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582645962] [2023-08-04 02:31:11,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:31:11,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 02:31:11,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:31:11,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 02:31:11,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 02:31:11,119 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 532 out of 1257 [2023-08-04 02:31:11,120 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 97 transitions, 246 flow. Second operand has 3 states, 3 states have (on average 536.0) internal successors, (1608), 3 states have internal predecessors, (1608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:31:11,120 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:31:11,120 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 532 of 1257 [2023-08-04 02:31:11,120 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:31:50,551 INFO L124 PetriNetUnfolderBase]: 492361/639109 cut-off events. [2023-08-04 02:31:50,551 INFO L125 PetriNetUnfolderBase]: For 46503/46503 co-relation queries the response was YES. [2023-08-04 02:31:52,094 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1312969 conditions, 639109 events. 492361/639109 cut-off events. For 46503/46503 co-relation queries the response was YES. Maximal size of possible extension queue 20510. Compared 4656113 event pairs, 269487 based on Foata normal form. 0/581524 useless extension candidates. Maximal degree in co-relation 836370. Up to 406379 conditions per place. [2023-08-04 02:31:54,192 INFO L140 encePairwiseOnDemand]: 1254/1257 looper letters, 127 selfloop transitions, 2 changer transitions 0/150 dead transitions. [2023-08-04 02:31:54,192 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 150 transitions, 620 flow [2023-08-04 02:31:54,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 02:31:54,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 02:31:54,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1724 transitions. [2023-08-04 02:31:54,195 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4571731636170777 [2023-08-04 02:31:54,195 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1724 transitions. [2023-08-04 02:31:54,195 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1724 transitions. [2023-08-04 02:31:54,196 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:31:54,196 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1724 transitions. [2023-08-04 02:31:54,198 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 574.6666666666666) internal successors, (1724), 3 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 02:31:54,201 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1257.0) internal successors, (5028), 4 states have internal predecessors, (5028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:31:54,202 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1257.0) internal successors, (5028), 4 states have internal predecessors, (5028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:31:54,202 INFO L175 Difference]: Start difference. First operand has 90 places, 97 transitions, 246 flow. Second operand 3 states and 1724 transitions. [2023-08-04 02:31:54,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 150 transitions, 620 flow [2023-08-04 02:31:54,209 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 150 transitions, 618 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 02:31:54,210 INFO L231 Difference]: Finished difference. Result has 92 places, 98 transitions, 256 flow [2023-08-04 02:31:54,211 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1257, PETRI_DIFFERENCE_MINUEND_FLOW=244, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=256, PETRI_PLACES=92, PETRI_TRANSITIONS=98} [2023-08-04 02:31:54,211 INFO L281 CegarLoopForPetriNet]: 90 programPoint places, 2 predicate places. [2023-08-04 02:31:54,211 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 98 transitions, 256 flow [2023-08-04 02:31:54,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 536.0) internal successors, (1608), 3 states have internal predecessors, (1608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:31:54,212 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:31:54,212 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:31:54,222 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-04 02:31:54,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:31:54,417 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:31:54,417 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:31:54,417 INFO L85 PathProgramCache]: Analyzing trace with hash -1445677993, now seen corresponding path program 1 times [2023-08-04 02:31:54,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:31:54,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22790422] [2023-08-04 02:31:54,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:31:54,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:31:54,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:31:54,473 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 02:31:54,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:31:54,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22790422] [2023-08-04 02:31:54,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22790422] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:31:54,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379042201] [2023-08-04 02:31:54,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:31:54,476 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:31:54,476 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:31:54,477 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 02:31:54,479 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-04 02:31:54,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:31:54,550 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 02:31:54,551 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:31:54,556 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 02:31:54,556 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 02:31:54,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [379042201] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:31:54,556 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 02:31:54,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-08-04 02:31:54,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660814852] [2023-08-04 02:31:54,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:31:54,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 02:31:54,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:31:54,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 02:31:54,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 02:31:54,565 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 532 out of 1257 [2023-08-04 02:31:54,566 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 98 transitions, 256 flow. Second operand has 3 states, 3 states have (on average 537.6666666666666) internal successors, (1613), 3 states have internal predecessors, (1613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:31:54,566 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:31:54,566 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 532 of 1257 [2023-08-04 02:31:54,566 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:32:32,677 INFO L124 PetriNetUnfolderBase]: 480228/621741 cut-off events. [2023-08-04 02:32:32,677 INFO L125 PetriNetUnfolderBase]: For 150344/150344 co-relation queries the response was YES. [2023-08-04 02:32:34,412 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1313919 conditions, 621741 events. 480228/621741 cut-off events. For 150344/150344 co-relation queries the response was YES. Maximal size of possible extension queue 19937. Compared 4404115 event pairs, 371029 based on Foata normal form. 0/577181 useless extension candidates. Maximal degree in co-relation 837880. Up to 546871 conditions per place. [2023-08-04 02:32:36,820 INFO L140 encePairwiseOnDemand]: 1254/1257 looper letters, 128 selfloop transitions, 2 changer transitions 0/151 dead transitions. [2023-08-04 02:32:36,821 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 151 transitions, 632 flow [2023-08-04 02:32:36,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 02:32:36,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 02:32:36,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1724 transitions. [2023-08-04 02:32:36,823 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4571731636170777 [2023-08-04 02:32:36,823 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1724 transitions. [2023-08-04 02:32:36,824 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1724 transitions. [2023-08-04 02:32:36,824 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:32:36,824 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1724 transitions. [2023-08-04 02:32:36,826 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 574.6666666666666) internal successors, (1724), 3 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 02:32:36,829 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1257.0) internal successors, (5028), 4 states have internal predecessors, (5028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:32:36,829 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1257.0) internal successors, (5028), 4 states have internal predecessors, (5028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:32:36,829 INFO L175 Difference]: Start difference. First operand has 92 places, 98 transitions, 256 flow. Second operand 3 states and 1724 transitions. [2023-08-04 02:32:36,829 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 151 transitions, 632 flow [2023-08-04 02:32:56,619 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 151 transitions, 630 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 02:32:56,621 INFO L231 Difference]: Finished difference. Result has 94 places, 99 transitions, 266 flow [2023-08-04 02:32:56,621 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1257, PETRI_DIFFERENCE_MINUEND_FLOW=254, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=266, PETRI_PLACES=94, PETRI_TRANSITIONS=99} [2023-08-04 02:32:56,621 INFO L281 CegarLoopForPetriNet]: 90 programPoint places, 4 predicate places. [2023-08-04 02:32:56,621 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 99 transitions, 266 flow [2023-08-04 02:32:56,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 537.6666666666666) internal successors, (1613), 3 states have internal predecessors, (1613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:32:56,622 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:32:56,622 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 02:32:56,626 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-04 02:32:56,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:32:56,825 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:32:56,825 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:32:56,825 INFO L85 PathProgramCache]: Analyzing trace with hash 1844754941, now seen corresponding path program 1 times [2023-08-04 02:32:56,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:32:56,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458504615] [2023-08-04 02:32:56,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:32:56,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:32:56,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:32:56,864 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 02:32:56,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:32:56,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458504615] [2023-08-04 02:32:56,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458504615] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:32:56,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132917287] [2023-08-04 02:32:56,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:32:56,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:32:56,864 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:32:56,865 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 02:32:56,867 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-04 02:32:56,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:32:56,961 INFO L262 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 02:32:56,963 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:32:56,980 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 02:32:56,980 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 02:32:57,003 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 02:32:57,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2132917287] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 02:32:57,003 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 02:32:57,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 02:32:57,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581009340] [2023-08-04 02:32:57,005 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 02:32:57,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 02:32:57,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:32:57,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 02:32:57,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 02:32:57,019 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 531 out of 1257 [2023-08-04 02:32:57,021 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 99 transitions, 266 flow. Second operand has 5 states, 5 states have (on average 536.2) internal successors, (2681), 5 states have internal predecessors, (2681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:32:57,021 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:32:57,021 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 531 of 1257 [2023-08-04 02:32:57,021 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:33:32,384 INFO L124 PetriNetUnfolderBase]: 457091/589079 cut-off events. [2023-08-04 02:33:32,384 INFO L125 PetriNetUnfolderBase]: For 107803/107803 co-relation queries the response was YES. [2023-08-04 02:33:34,063 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1246746 conditions, 589079 events. 457091/589079 cut-off events. For 107803/107803 co-relation queries the response was YES. Maximal size of possible extension queue 19610. Compared 4098592 event pairs, 183134 based on Foata normal form. 11/547488 useless extension candidates. Maximal degree in co-relation 1102750. Up to 569921 conditions per place. [2023-08-04 02:33:36,344 INFO L140 encePairwiseOnDemand]: 1253/1257 looper letters, 112 selfloop transitions, 3 changer transitions 1/137 dead transitions. [2023-08-04 02:33:36,344 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 137 transitions, 574 flow [2023-08-04 02:33:36,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 02:33:36,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 02:33:36,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 2238 transitions. [2023-08-04 02:33:36,348 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4451073985680191 [2023-08-04 02:33:36,348 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 2238 transitions. [2023-08-04 02:33:36,348 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 2238 transitions. [2023-08-04 02:33:36,349 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:33:36,349 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 2238 transitions. [2023-08-04 02:33:36,378 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 559.5) internal successors, (2238), 4 states have internal predecessors, (2238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:33:36,382 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 1257.0) internal successors, (6285), 5 states have internal predecessors, (6285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:33:36,382 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 1257.0) internal successors, (6285), 5 states have internal predecessors, (6285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:33:36,382 INFO L175 Difference]: Start difference. First operand has 94 places, 99 transitions, 266 flow. Second operand 4 states and 2238 transitions. [2023-08-04 02:33:36,382 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 137 transitions, 574 flow [2023-08-04 02:34:09,933 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 137 transitions, 572 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 02:34:09,934 INFO L231 Difference]: Finished difference. Result has 98 places, 99 transitions, 278 flow [2023-08-04 02:34:09,934 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1257, PETRI_DIFFERENCE_MINUEND_FLOW=264, PETRI_DIFFERENCE_MINUEND_PLACES=93, 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=278, PETRI_PLACES=98, PETRI_TRANSITIONS=99} [2023-08-04 02:34:09,935 INFO L281 CegarLoopForPetriNet]: 90 programPoint places, 8 predicate places. [2023-08-04 02:34:09,935 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 99 transitions, 278 flow [2023-08-04 02:34:09,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 536.2) internal successors, (2681), 5 states have internal predecessors, (2681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:34:09,935 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:34:09,935 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] [2023-08-04 02:34:09,941 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 02:34:10,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:34:10,139 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:34:10,139 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:34:10,139 INFO L85 PathProgramCache]: Analyzing trace with hash -222262882, now seen corresponding path program 1 times [2023-08-04 02:34:10,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:34:10,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776605996] [2023-08-04 02:34:10,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:34:10,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:34:10,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:34:10,177 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 02:34:10,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:34:10,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776605996] [2023-08-04 02:34:10,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776605996] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:34:10,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941792678] [2023-08-04 02:34:10,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:34:10,177 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:34:10,177 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:34:10,179 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 02:34:10,181 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-04 02:34:10,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:34:10,261 INFO L262 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 02:34:10,262 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:34:10,270 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 02:34:10,270 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 02:34:10,279 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 02:34:10,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1941792678] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 02:34:10,280 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 02:34:10,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 02:34:10,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18753793] [2023-08-04 02:34:10,280 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 02:34:10,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 02:34:10,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:34:10,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 02:34:10,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 02:34:10,291 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 531 out of 1257 [2023-08-04 02:34:10,292 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 99 transitions, 278 flow. Second operand has 5 states, 5 states have (on average 536.4) internal successors, (2682), 5 states have internal predecessors, (2682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:34:10,292 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:34:10,292 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 531 of 1257 [2023-08-04 02:34:10,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand