/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.order.of.the.error.locations.to.be.checked PROGRAM_FIRST -tc /storage/repos/CAV22/benchmarks/AutomizerCInline.xml -i /storage/repos/CAV22/benchmarks/increased_bounds/weaver_chl-array-int-trans.wvr_bound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 08:16:47,626 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 08:16:47,702 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 08:16:47,706 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 08:16:47,707 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 08:16:47,707 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 08:16:47,707 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 08:16:47,736 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 08:16:47,736 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 08:16:47,740 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 08:16:47,740 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 08:16:47,741 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 08:16:47,741 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 08:16:47,743 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 08:16:47,743 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 08:16:47,743 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 08:16:47,743 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 08:16:47,744 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 08:16:47,744 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 08:16:47,744 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 08:16:47,744 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 08:16:47,745 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 08:16:47,745 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 08:16:47,745 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 08:16:47,745 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 08:16:47,745 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 08:16:47,746 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 08:16:47,746 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 08:16:47,746 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 08:16:47,747 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 08:16:47,747 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 08:16:47,748 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 08:16:47,748 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 08:16:47,748 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 08:16:47,749 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 08:16:47,749 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 08:16:47,749 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 08:16:47,749 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 08:16:47,749 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 08:16:47,750 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 08:16:47,750 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 08:16:47,750 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-04 08:16:47,986 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 08:16:48,008 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 08:16:48,010 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 08:16:48,011 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 08:16:48,011 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 08:16:48,012 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/weaver_chl-array-int-trans.wvr_bound2.c [2023-08-04 08:16:49,125 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 08:16:49,295 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 08:16:49,296 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/weaver_chl-array-int-trans.wvr_bound2.c [2023-08-04 08:16:49,303 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6c27728f4/e39eb733558445b0b8cc20b4a41b3525/FLAG255d0388c [2023-08-04 08:16:49,314 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6c27728f4/e39eb733558445b0b8cc20b4a41b3525 [2023-08-04 08:16:49,316 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 08:16:49,317 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 08:16:49,318 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 08:16:49,318 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 08:16:49,321 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 08:16:49,322 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 08:16:49" (1/1) ... [2023-08-04 08:16:49,322 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@476c8f05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:16:49, skipping insertion in model container [2023-08-04 08:16:49,322 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 08:16:49" (1/1) ... [2023-08-04 08:16:49,343 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 08:16:49,493 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/weaver_chl-array-int-trans.wvr_bound2.c[2971,2984] [2023-08-04 08:16:49,499 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 08:16:49,507 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 08:16:49,530 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/weaver_chl-array-int-trans.wvr_bound2.c[2971,2984] [2023-08-04 08:16:49,533 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 08:16:49,545 INFO L206 MainTranslator]: Completed translation [2023-08-04 08:16:49,546 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:16:49 WrapperNode [2023-08-04 08:16:49,546 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 08:16:49,547 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 08:16:49,547 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 08:16:49,547 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 08:16:49,553 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:16:49" (1/1) ... [2023-08-04 08:16:49,569 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:16:49" (1/1) ... [2023-08-04 08:16:49,601 INFO L138 Inliner]: procedures = 26, calls = 49, calls flagged for inlining = 13, calls inlined = 21, statements flattened = 331 [2023-08-04 08:16:49,601 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 08:16:49,602 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 08:16:49,602 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 08:16:49,602 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 08:16:49,610 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:16:49" (1/1) ... [2023-08-04 08:16:49,611 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:16:49" (1/1) ... [2023-08-04 08:16:49,621 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:16:49" (1/1) ... [2023-08-04 08:16:49,621 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:16:49" (1/1) ... [2023-08-04 08:16:49,629 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:16:49" (1/1) ... [2023-08-04 08:16:49,634 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:16:49" (1/1) ... [2023-08-04 08:16:49,636 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:16:49" (1/1) ... [2023-08-04 08:16:49,637 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:16:49" (1/1) ... [2023-08-04 08:16:49,641 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 08:16:49,641 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 08:16:49,641 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 08:16:49,642 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 08:16:49,642 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:16:49" (1/1) ... [2023-08-04 08:16:49,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 08:16:49,658 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:16:49,669 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-04 08:16:49,695 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-04 08:16:49,709 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 08:16:49,709 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 08:16:49,710 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 08:16:49,710 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 08:16:49,710 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-04 08:16:49,710 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-04 08:16:49,710 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-04 08:16:49,710 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-04 08:16:49,710 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-04 08:16:49,710 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-04 08:16:49,710 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 08:16:49,710 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-04 08:16:49,711 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 08:16:49,711 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 08:16:49,711 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 08:16:49,712 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-04 08:16:49,834 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 08:16:49,836 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 08:16:50,294 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 08:16:50,302 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 08:16:50,303 INFO L302 CfgBuilder]: Removed 12 assume(true) statements. [2023-08-04 08:16:50,305 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 08:16:50 BoogieIcfgContainer [2023-08-04 08:16:50,305 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 08:16:50,327 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 08:16:50,328 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 08:16:50,330 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 08:16:50,331 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 08:16:49" (1/3) ... [2023-08-04 08:16:50,331 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@636cb565 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 08:16:50, skipping insertion in model container [2023-08-04 08:16:50,331 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:16:49" (2/3) ... [2023-08-04 08:16:50,332 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@636cb565 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 08:16:50, skipping insertion in model container [2023-08-04 08:16:50,332 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 08:16:50" (3/3) ... [2023-08-04 08:16:50,333 INFO L112 eAbstractionObserver]: Analyzing ICFG weaver_chl-array-int-trans.wvr_bound2.c [2023-08-04 08:16:50,339 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 08:16:50,345 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 08:16:50,345 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 08:16:50,345 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 08:16:50,491 INFO L144 ThreadInstanceAdder]: Constructed 9 joinOtherThreadTransitions. [2023-08-04 08:16:50,525 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 330 places, 366 transitions, 774 flow [2023-08-04 08:16:50,807 INFO L124 PetriNetUnfolderBase]: 129/970 cut-off events. [2023-08-04 08:16:50,808 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-04 08:16:50,828 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1031 conditions, 970 events. 129/970 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 5402 event pairs, 0 based on Foata normal form. 0/831 useless extension candidates. Maximal degree in co-relation 547. Up to 16 conditions per place. [2023-08-04 08:16:50,828 INFO L82 GeneralOperation]: Start removeDead. Operand has 330 places, 366 transitions, 774 flow [2023-08-04 08:16:50,845 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 330 places, 366 transitions, 774 flow [2023-08-04 08:16:50,849 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 08:16:50,861 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 330 places, 366 transitions, 774 flow [2023-08-04 08:16:50,868 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 330 places, 366 transitions, 774 flow [2023-08-04 08:16:50,869 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 330 places, 366 transitions, 774 flow [2023-08-04 08:16:51,026 INFO L124 PetriNetUnfolderBase]: 129/970 cut-off events. [2023-08-04 08:16:51,026 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-04 08:16:51,036 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1031 conditions, 970 events. 129/970 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 5402 event pairs, 0 based on Foata normal form. 0/831 useless extension candidates. Maximal degree in co-relation 547. Up to 16 conditions per place. [2023-08-04 08:16:51,073 INFO L119 LiptonReduction]: Number of co-enabled transitions 31944 [2023-08-04 08:16:59,592 INFO L134 LiptonReduction]: Checked pairs total: 50937 [2023-08-04 08:16:59,593 INFO L136 LiptonReduction]: Total number of compositions: 389 [2023-08-04 08:16:59,604 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 08:16:59,610 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;@4772713e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 08:16:59,610 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 08:16:59,616 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 08:16:59,616 INFO L124 PetriNetUnfolderBase]: 5/41 cut-off events. [2023-08-04 08:16:59,616 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 08:16:59,616 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:16:59,617 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:16:59,617 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:16:59,621 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:16:59,621 INFO L85 PathProgramCache]: Analyzing trace with hash -1599802993, now seen corresponding path program 1 times [2023-08-04 08:16:59,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:16:59,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821531487] [2023-08-04 08:16:59,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:16:59,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:16:59,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:16:59,943 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 08:16:59,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:16:59,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821531487] [2023-08-04 08:16:59,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821531487] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:16:59,944 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 08:16:59,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 08:16:59,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000289906] [2023-08-04 08:16:59,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:16:59,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:16:59,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:16:59,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:16:59,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 08:16:59,998 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 324 out of 755 [2023-08-04 08:17:00,004 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 68 transitions, 178 flow. Second operand has 3 states, 3 states have (on average 327.3333333333333) internal successors, (982), 3 states have internal predecessors, (982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:17:00,005 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:17:00,005 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 324 of 755 [2023-08-04 08:17:00,006 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:17:01,928 INFO L124 PetriNetUnfolderBase]: 16443/22508 cut-off events. [2023-08-04 08:17:01,929 INFO L125 PetriNetUnfolderBase]: For 1304/1304 co-relation queries the response was YES. [2023-08-04 08:17:01,964 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45282 conditions, 22508 events. 16443/22508 cut-off events. For 1304/1304 co-relation queries the response was YES. Maximal size of possible extension queue 620. Compared 114360 event pairs, 7638 based on Foata normal form. 0/16348 useless extension candidates. Maximal degree in co-relation 40683. Up to 21999 conditions per place. [2023-08-04 08:17:02,061 INFO L140 encePairwiseOnDemand]: 751/755 looper letters, 67 selfloop transitions, 2 changer transitions 4/76 dead transitions. [2023-08-04 08:17:02,061 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 76 transitions, 334 flow [2023-08-04 08:17:02,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:17:02,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:17:02,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1044 transitions. [2023-08-04 08:17:02,080 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4609271523178808 [2023-08-04 08:17:02,081 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1044 transitions. [2023-08-04 08:17:02,082 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1044 transitions. [2023-08-04 08:17:02,085 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:17:02,087 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1044 transitions. [2023-08-04 08:17:02,093 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 348.0) internal successors, (1044), 3 states have internal predecessors, (1044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:17:02,101 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 755.0) internal successors, (3020), 4 states have internal predecessors, (3020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:17:02,102 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 755.0) internal successors, (3020), 4 states have internal predecessors, (3020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:17:02,104 INFO L175 Difference]: Start difference. First operand has 57 places, 68 transitions, 178 flow. Second operand 3 states and 1044 transitions. [2023-08-04 08:17:02,105 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 76 transitions, 334 flow [2023-08-04 08:17:02,112 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 76 transitions, 334 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 08:17:02,115 INFO L231 Difference]: Finished difference. Result has 59 places, 64 transitions, 172 flow [2023-08-04 08:17:02,116 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=755, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=172, PETRI_PLACES=59, PETRI_TRANSITIONS=64} [2023-08-04 08:17:02,120 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 2 predicate places. [2023-08-04 08:17:02,120 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 64 transitions, 172 flow [2023-08-04 08:17:02,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 327.3333333333333) internal successors, (982), 3 states have internal predecessors, (982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:17:02,121 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:17:02,121 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:17:02,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 08:17:02,122 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:17:02,129 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:17:02,129 INFO L85 PathProgramCache]: Analyzing trace with hash -1695605401, now seen corresponding path program 1 times [2023-08-04 08:17:02,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:17:02,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287143600] [2023-08-04 08:17:02,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:17:02,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:17:02,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:17:02,254 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 08:17:02,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:17:02,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287143600] [2023-08-04 08:17:02,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287143600] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:17:02,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916768333] [2023-08-04 08:17:02,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:17:02,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:17:02,255 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:17:02,258 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:17:02,264 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-04 08:17:02,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:17:02,354 INFO L262 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:17:02,357 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:17:02,372 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 08:17:02,372 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:17:02,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1916768333] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:17:02,373 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:17:02,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 08:17:02,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572797954] [2023-08-04 08:17:02,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:17:02,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:17:02,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:17:02,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:17:02,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:17:02,388 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 324 out of 755 [2023-08-04 08:17:02,389 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 64 transitions, 172 flow. Second operand has 3 states, 3 states have (on average 328.3333333333333) internal successors, (985), 3 states have internal predecessors, (985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:17:02,389 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:17:02,389 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 324 of 755 [2023-08-04 08:17:02,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:17:04,022 INFO L124 PetriNetUnfolderBase]: 16077/21899 cut-off events. [2023-08-04 08:17:04,023 INFO L125 PetriNetUnfolderBase]: For 1044/1044 co-relation queries the response was YES. [2023-08-04 08:17:04,065 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44100 conditions, 21899 events. 16077/21899 cut-off events. For 1044/1044 co-relation queries the response was YES. Maximal size of possible extension queue 628. Compared 111432 event pairs, 7574 based on Foata normal form. 0/15885 useless extension candidates. Maximal degree in co-relation 39496. Up to 21334 conditions per place. [2023-08-04 08:17:04,134 INFO L140 encePairwiseOnDemand]: 752/755 looper letters, 75 selfloop transitions, 2 changer transitions 1/81 dead transitions. [2023-08-04 08:17:04,134 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 81 transitions, 362 flow [2023-08-04 08:17:04,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:17:04,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:17:04,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1051 transitions. [2023-08-04 08:17:04,141 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4640176600441501 [2023-08-04 08:17:04,141 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1051 transitions. [2023-08-04 08:17:04,145 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1051 transitions. [2023-08-04 08:17:04,145 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:17:04,145 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1051 transitions. [2023-08-04 08:17:04,148 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 350.3333333333333) internal successors, (1051), 3 states have internal predecessors, (1051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:17:04,151 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 755.0) internal successors, (3020), 4 states have internal predecessors, (3020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:17:04,153 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 755.0) internal successors, (3020), 4 states have internal predecessors, (3020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:17:04,153 INFO L175 Difference]: Start difference. First operand has 59 places, 64 transitions, 172 flow. Second operand 3 states and 1051 transitions. [2023-08-04 08:17:04,153 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 81 transitions, 362 flow [2023-08-04 08:17:04,163 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 81 transitions, 346 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-08-04 08:17:04,165 INFO L231 Difference]: Finished difference. Result has 54 places, 64 transitions, 164 flow [2023-08-04 08:17:04,165 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=755, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=164, PETRI_PLACES=54, PETRI_TRANSITIONS=64} [2023-08-04 08:17:04,166 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -3 predicate places. [2023-08-04 08:17:04,166 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 64 transitions, 164 flow [2023-08-04 08:17:04,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 328.3333333333333) internal successors, (985), 3 states have internal predecessors, (985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:17:04,167 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:17:04,167 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:17:04,176 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-04 08:17:04,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:17:04,375 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:17:04,376 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:17:04,376 INFO L85 PathProgramCache]: Analyzing trace with hash -2043850263, now seen corresponding path program 1 times [2023-08-04 08:17:04,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:17:04,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106399503] [2023-08-04 08:17:04,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:17:04,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:17:04,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:17:04,566 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 08:17:04,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:17:04,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106399503] [2023-08-04 08:17:04,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106399503] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:17:04,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701317323] [2023-08-04 08:17:04,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:17:04,567 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:17:04,567 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:17:04,569 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:17:04,572 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-04 08:17:04,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:17:04,664 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:17:04,666 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:17:04,673 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 08:17:04,673 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:17:04,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [701317323] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:17:04,673 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:17:04,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 08:17:04,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502624002] [2023-08-04 08:17:04,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:17:04,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:17:04,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:17:04,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:17:04,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:17:04,688 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 324 out of 755 [2023-08-04 08:17:04,689 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 64 transitions, 164 flow. Second operand has 3 states, 3 states have (on average 329.3333333333333) internal successors, (988), 3 states have internal predecessors, (988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:17:04,689 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:17:04,690 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 324 of 755 [2023-08-04 08:17:04,690 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:17:06,111 INFO L124 PetriNetUnfolderBase]: 16028/21940 cut-off events. [2023-08-04 08:17:06,111 INFO L125 PetriNetUnfolderBase]: For 119/119 co-relation queries the response was YES. [2023-08-04 08:17:06,134 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44182 conditions, 21940 events. 16028/21940 cut-off events. For 119/119 co-relation queries the response was YES. Maximal size of possible extension queue 641. Compared 112962 event pairs, 7349 based on Foata normal form. 0/16069 useless extension candidates. Maximal degree in co-relation 23106. Up to 19887 conditions per place. [2023-08-04 08:17:06,194 INFO L140 encePairwiseOnDemand]: 752/755 looper letters, 83 selfloop transitions, 2 changer transitions 1/89 dead transitions. [2023-08-04 08:17:06,194 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 89 transitions, 386 flow [2023-08-04 08:17:06,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:17:06,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:17:06,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1059 transitions. [2023-08-04 08:17:06,197 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4675496688741722 [2023-08-04 08:17:06,197 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1059 transitions. [2023-08-04 08:17:06,197 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1059 transitions. [2023-08-04 08:17:06,198 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:17:06,198 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1059 transitions. [2023-08-04 08:17:06,200 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 353.0) internal successors, (1059), 3 states have internal predecessors, (1059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:17:06,204 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 755.0) internal successors, (3020), 4 states have internal predecessors, (3020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:17:06,205 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 755.0) internal successors, (3020), 4 states have internal predecessors, (3020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:17:06,206 INFO L175 Difference]: Start difference. First operand has 54 places, 64 transitions, 164 flow. Second operand 3 states and 1059 transitions. [2023-08-04 08:17:06,206 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 89 transitions, 386 flow [2023-08-04 08:17:06,209 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 89 transitions, 382 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 08:17:06,210 INFO L231 Difference]: Finished difference. Result has 55 places, 64 transitions, 168 flow [2023-08-04 08:17:06,210 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=755, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=168, PETRI_PLACES=55, PETRI_TRANSITIONS=64} [2023-08-04 08:17:06,212 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -2 predicate places. [2023-08-04 08:17:06,212 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 64 transitions, 168 flow [2023-08-04 08:17:06,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 329.3333333333333) internal successors, (988), 3 states have internal predecessors, (988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:17:06,213 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:17:06,213 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:17:06,223 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-04 08:17:06,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-08-04 08:17:06,419 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:17:06,419 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:17:06,420 INFO L85 PathProgramCache]: Analyzing trace with hash 1074187417, now seen corresponding path program 1 times [2023-08-04 08:17:06,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:17:06,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674379696] [2023-08-04 08:17:06,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:17:06,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:17:06,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:17:06,502 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 08:17:06,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:17:06,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674379696] [2023-08-04 08:17:06,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674379696] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:17:06,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015116296] [2023-08-04 08:17:06,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:17:06,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:17:06,504 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:17:06,505 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:17:06,530 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-04 08:17:06,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:17:06,608 INFO L262 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:17:06,610 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:17:06,620 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 08:17:06,620 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:17:06,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1015116296] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:17:06,620 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:17:06,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 08:17:06,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716687690] [2023-08-04 08:17:06,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:17:06,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:17:06,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:17:06,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:17:06,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:17:06,631 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 324 out of 755 [2023-08-04 08:17:06,632 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 64 transitions, 168 flow. Second operand has 3 states, 3 states have (on average 330.3333333333333) internal successors, (991), 3 states have internal predecessors, (991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:17:06,632 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:17:06,632 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 324 of 755 [2023-08-04 08:17:06,632 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:17:07,351 INFO L124 PetriNetUnfolderBase]: 9182/12791 cut-off events. [2023-08-04 08:17:07,351 INFO L125 PetriNetUnfolderBase]: For 864/864 co-relation queries the response was YES. [2023-08-04 08:17:07,362 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26907 conditions, 12791 events. 9182/12791 cut-off events. For 864/864 co-relation queries the response was YES. Maximal size of possible extension queue 305. Compared 60956 event pairs, 4699 based on Foata normal form. 0/9930 useless extension candidates. Maximal degree in co-relation 13596. Up to 9058 conditions per place. [2023-08-04 08:17:07,392 INFO L140 encePairwiseOnDemand]: 752/755 looper letters, 88 selfloop transitions, 2 changer transitions 0/93 dead transitions. [2023-08-04 08:17:07,392 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 93 transitions, 412 flow [2023-08-04 08:17:07,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:17:07,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:17:07,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1063 transitions. [2023-08-04 08:17:07,398 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4693156732891832 [2023-08-04 08:17:07,398 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1063 transitions. [2023-08-04 08:17:07,398 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1063 transitions. [2023-08-04 08:17:07,399 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:17:07,399 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1063 transitions. [2023-08-04 08:17:07,401 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 354.3333333333333) internal successors, (1063), 3 states have internal predecessors, (1063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:17:07,404 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 755.0) internal successors, (3020), 4 states have internal predecessors, (3020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:17:07,406 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 755.0) internal successors, (3020), 4 states have internal predecessors, (3020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:17:07,406 INFO L175 Difference]: Start difference. First operand has 55 places, 64 transitions, 168 flow. Second operand 3 states and 1063 transitions. [2023-08-04 08:17:07,406 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 93 transitions, 412 flow [2023-08-04 08:17:07,407 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 93 transitions, 408 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 08:17:07,408 INFO L231 Difference]: Finished difference. Result has 56 places, 65 transitions, 176 flow [2023-08-04 08:17:07,409 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=755, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=176, PETRI_PLACES=56, PETRI_TRANSITIONS=65} [2023-08-04 08:17:07,409 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -1 predicate places. [2023-08-04 08:17:07,409 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 65 transitions, 176 flow [2023-08-04 08:17:07,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 330.3333333333333) internal successors, (991), 3 states have internal predecessors, (991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:17:07,410 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:17:07,410 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:17:07,417 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 08:17:07,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:17:07,616 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:17:07,616 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:17:07,616 INFO L85 PathProgramCache]: Analyzing trace with hash -333533807, now seen corresponding path program 1 times [2023-08-04 08:17:07,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:17:07,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520706711] [2023-08-04 08:17:07,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:17:07,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:17:07,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:17:07,701 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 08:17:07,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:17:07,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520706711] [2023-08-04 08:17:07,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520706711] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:17:07,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525533511] [2023-08-04 08:17:07,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:17:07,705 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:17:07,706 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:17:07,707 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:17:07,725 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-04 08:17:07,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:17:07,814 INFO L262 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:17:07,815 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:17:07,826 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-04 08:17:07,826 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:17:07,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [525533511] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:17:07,827 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:17:07,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 08:17:07,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267406761] [2023-08-04 08:17:07,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:17:07,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:17:07,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:17:07,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:17:07,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:17:07,838 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 324 out of 755 [2023-08-04 08:17:07,840 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 65 transitions, 176 flow. Second operand has 3 states, 3 states have (on average 332.0) internal successors, (996), 3 states have internal predecessors, (996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:17:07,840 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:17:07,840 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 324 of 755 [2023-08-04 08:17:07,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:17:08,475 INFO L124 PetriNetUnfolderBase]: 8137/11309 cut-off events. [2023-08-04 08:17:08,475 INFO L125 PetriNetUnfolderBase]: For 1999/1999 co-relation queries the response was YES. [2023-08-04 08:17:08,488 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24361 conditions, 11309 events. 8137/11309 cut-off events. For 1999/1999 co-relation queries the response was YES. Maximal size of possible extension queue 299. Compared 52102 event pairs, 5441 based on Foata normal form. 0/9157 useless extension candidates. Maximal degree in co-relation 12586. Up to 9990 conditions per place. [2023-08-04 08:17:08,516 INFO L140 encePairwiseOnDemand]: 752/755 looper letters, 89 selfloop transitions, 2 changer transitions 0/94 dead transitions. [2023-08-04 08:17:08,516 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 94 transitions, 422 flow [2023-08-04 08:17:08,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:17:08,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:17:08,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1063 transitions. [2023-08-04 08:17:08,519 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4693156732891832 [2023-08-04 08:17:08,519 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1063 transitions. [2023-08-04 08:17:08,519 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1063 transitions. [2023-08-04 08:17:08,520 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:17:08,520 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1063 transitions. [2023-08-04 08:17:08,522 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 354.3333333333333) internal successors, (1063), 3 states have internal predecessors, (1063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:17:08,526 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 755.0) internal successors, (3020), 4 states have internal predecessors, (3020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:17:08,527 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 755.0) internal successors, (3020), 4 states have internal predecessors, (3020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:17:08,527 INFO L175 Difference]: Start difference. First operand has 56 places, 65 transitions, 176 flow. Second operand 3 states and 1063 transitions. [2023-08-04 08:17:08,527 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 94 transitions, 422 flow [2023-08-04 08:17:08,544 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 94 transitions, 420 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:17:08,546 INFO L231 Difference]: Finished difference. Result has 58 places, 66 transitions, 186 flow [2023-08-04 08:17:08,546 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=755, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=186, PETRI_PLACES=58, PETRI_TRANSITIONS=66} [2023-08-04 08:17:08,547 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 1 predicate places. [2023-08-04 08:17:08,547 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 66 transitions, 186 flow [2023-08-04 08:17:08,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 332.0) internal successors, (996), 3 states have internal predecessors, (996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:17:08,548 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:17:08,548 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:17:08,561 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-04 08:17:08,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:17:08,759 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:17:08,760 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:17:08,760 INFO L85 PathProgramCache]: Analyzing trace with hash 875777592, now seen corresponding path program 1 times [2023-08-04 08:17:08,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:17:08,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107493404] [2023-08-04 08:17:08,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:17:08,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:17:08,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:17:08,835 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-04 08:17:08,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:17:08,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107493404] [2023-08-04 08:17:08,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107493404] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:17:08,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594159231] [2023-08-04 08:17:08,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:17:08,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:17:08,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:17:08,836 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:17:08,839 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-04 08:17:08,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:17:08,949 INFO L262 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:17:08,951 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:17:08,968 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 08:17:08,968 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:17:08,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [594159231] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:17:08,969 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:17:08,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-08-04 08:17:08,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47266935] [2023-08-04 08:17:08,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:17:08,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:17:08,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:17:08,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:17:08,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:17:08,978 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 324 out of 755 [2023-08-04 08:17:08,979 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 66 transitions, 186 flow. Second operand has 3 states, 3 states have (on average 333.6666666666667) internal successors, (1001), 3 states have internal predecessors, (1001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:17:08,980 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:17:08,980 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 324 of 755 [2023-08-04 08:17:08,980 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:17:09,705 INFO L124 PetriNetUnfolderBase]: 8112/11265 cut-off events. [2023-08-04 08:17:09,705 INFO L125 PetriNetUnfolderBase]: For 1330/1330 co-relation queries the response was YES. [2023-08-04 08:17:09,717 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24363 conditions, 11265 events. 8112/11265 cut-off events. For 1330/1330 co-relation queries the response was YES. Maximal size of possible extension queue 299. Compared 51826 event pairs, 5946 based on Foata normal form. 0/9162 useless extension candidates. Maximal degree in co-relation 21230. Up to 10978 conditions per place. [2023-08-04 08:17:09,737 INFO L140 encePairwiseOnDemand]: 752/755 looper letters, 83 selfloop transitions, 2 changer transitions 3/91 dead transitions. [2023-08-04 08:17:09,738 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 91 transitions, 412 flow [2023-08-04 08:17:09,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:17:09,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:17:09,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1059 transitions. [2023-08-04 08:17:09,741 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4675496688741722 [2023-08-04 08:17:09,741 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1059 transitions. [2023-08-04 08:17:09,741 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1059 transitions. [2023-08-04 08:17:09,742 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:17:09,742 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1059 transitions. [2023-08-04 08:17:09,744 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 353.0) internal successors, (1059), 3 states have internal predecessors, (1059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:17:09,748 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 755.0) internal successors, (3020), 4 states have internal predecessors, (3020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:17:09,750 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 755.0) internal successors, (3020), 4 states have internal predecessors, (3020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:17:09,750 INFO L175 Difference]: Start difference. First operand has 58 places, 66 transitions, 186 flow. Second operand 3 states and 1059 transitions. [2023-08-04 08:17:09,750 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 91 transitions, 412 flow [2023-08-04 08:17:09,788 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 91 transitions, 410 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:17:09,789 INFO L231 Difference]: Finished difference. Result has 60 places, 64 transitions, 184 flow [2023-08-04 08:17:09,790 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=755, PETRI_DIFFERENCE_MINUEND_FLOW=184, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=184, PETRI_PLACES=60, PETRI_TRANSITIONS=64} [2023-08-04 08:17:09,790 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 3 predicate places. [2023-08-04 08:17:09,790 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 64 transitions, 184 flow [2023-08-04 08:17:09,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 333.6666666666667) internal successors, (1001), 3 states have internal predecessors, (1001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:17:09,791 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:17:09,791 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:17:09,803 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-04 08:17:09,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:17:09,997 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:17:09,998 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:17:09,998 INFO L85 PathProgramCache]: Analyzing trace with hash 1499421598, now seen corresponding path program 1 times [2023-08-04 08:17:09,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:17:09,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029329340] [2023-08-04 08:17:09,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:17:09,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:17:10,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:17:10,085 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 08:17:10,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:17:10,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029329340] [2023-08-04 08:17:10,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029329340] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:17:10,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856647051] [2023-08-04 08:17:10,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:17:10,091 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:17:10,091 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:17:10,092 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:17:10,118 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-04 08:17:10,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:17:10,227 INFO L262 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 08:17:10,230 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:17:10,271 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 08:17:10,272 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:17:10,294 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 08:17:10,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1856647051] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:17:10,294 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:17:10,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 08:17:10,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076995312] [2023-08-04 08:17:10,295 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:17:10,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 08:17:10,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:17:10,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 08:17:10,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:17:10,311 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 323 out of 755 [2023-08-04 08:17:10,313 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 64 transitions, 184 flow. Second operand has 5 states, 5 states have (on average 330.8) internal successors, (1654), 5 states have internal predecessors, (1654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:17:10,313 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:17:10,313 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 323 of 755 [2023-08-04 08:17:10,313 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:17:10,355 INFO L124 PetriNetUnfolderBase]: 21/47 cut-off events. [2023-08-04 08:17:10,355 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 08:17:10,355 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114 conditions, 47 events. 21/47 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 78 event pairs, 0 based on Foata normal form. 7/46 useless extension candidates. Maximal degree in co-relation 102. Up to 30 conditions per place. [2023-08-04 08:17:10,355 INFO L140 encePairwiseOnDemand]: 752/755 looper letters, 0 selfloop transitions, 0 changer transitions 27/27 dead transitions. [2023-08-04 08:17:10,355 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 27 transitions, 112 flow [2023-08-04 08:17:10,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 08:17:10,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 08:17:10,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1320 transitions. [2023-08-04 08:17:10,360 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4370860927152318 [2023-08-04 08:17:10,360 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1320 transitions. [2023-08-04 08:17:10,360 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1320 transitions. [2023-08-04 08:17:10,361 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:17:10,361 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1320 transitions. [2023-08-04 08:17:10,363 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 330.0) internal successors, (1320), 4 states have internal predecessors, (1320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:17:10,367 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 755.0) internal successors, (3775), 5 states have internal predecessors, (3775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:17:10,368 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 755.0) internal successors, (3775), 5 states have internal predecessors, (3775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:17:10,368 INFO L175 Difference]: Start difference. First operand has 60 places, 64 transitions, 184 flow. Second operand 4 states and 1320 transitions. [2023-08-04 08:17:10,368 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 27 transitions, 112 flow [2023-08-04 08:17:10,369 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 27 transitions, 110 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:17:10,369 INFO L231 Difference]: Finished difference. Result has 26 places, 0 transitions, 0 flow [2023-08-04 08:17:10,370 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=755, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=26, PETRI_TRANSITIONS=0} [2023-08-04 08:17:10,370 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -31 predicate places. [2023-08-04 08:17:10,370 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 0 transitions, 0 flow [2023-08-04 08:17:10,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 330.8) internal successors, (1654), 5 states have internal predecessors, (1654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:17:10,374 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-04 08:17:10,381 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-04 08:17:10,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:17:10,581 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:17:10,583 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-04 08:17:10,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 330 places, 366 transitions, 774 flow [2023-08-04 08:17:10,718 INFO L124 PetriNetUnfolderBase]: 129/970 cut-off events. [2023-08-04 08:17:10,718 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-04 08:17:10,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1031 conditions, 970 events. 129/970 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 5402 event pairs, 0 based on Foata normal form. 0/831 useless extension candidates. Maximal degree in co-relation 547. Up to 16 conditions per place. [2023-08-04 08:17:10,726 INFO L82 GeneralOperation]: Start removeDead. Operand has 330 places, 366 transitions, 774 flow [2023-08-04 08:17:10,730 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 330 places, 366 transitions, 774 flow [2023-08-04 08:17:10,730 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 08:17:10,730 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 330 places, 366 transitions, 774 flow [2023-08-04 08:17:10,731 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 330 places, 366 transitions, 774 flow [2023-08-04 08:17:10,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 330 places, 366 transitions, 774 flow [2023-08-04 08:17:10,835 INFO L124 PetriNetUnfolderBase]: 129/970 cut-off events. [2023-08-04 08:17:10,835 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-04 08:17:10,842 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1031 conditions, 970 events. 129/970 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 5402 event pairs, 0 based on Foata normal form. 0/831 useless extension candidates. Maximal degree in co-relation 547. Up to 16 conditions per place. [2023-08-04 08:17:10,860 INFO L119 LiptonReduction]: Number of co-enabled transitions 31944 [2023-08-04 08:17:18,573 INFO L134 LiptonReduction]: Checked pairs total: 46104 [2023-08-04 08:17:18,573 INFO L136 LiptonReduction]: Total number of compositions: 369 [2023-08-04 08:17:18,575 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 08:17:18,575 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;@4772713e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 08:17:18,575 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-04 08:17:18,579 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 08:17:18,579 INFO L124 PetriNetUnfolderBase]: 5/39 cut-off events. [2023-08-04 08:17:18,579 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 08:17:18,579 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:17:18,579 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:17:18,579 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 08:17:18,579 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:17:18,579 INFO L85 PathProgramCache]: Analyzing trace with hash -476600479, now seen corresponding path program 1 times [2023-08-04 08:17:18,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:17:18,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075447783] [2023-08-04 08:17:18,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:17:18,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:17:18,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 08:17:18,621 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 08:17:18,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 08:17:18,677 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 08:17:18,678 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 08:17:18,678 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-04 08:17:18,678 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-04 08:17:18,678 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-04 08:17:18,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-04 08:17:18,678 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-04 08:17:18,679 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN,UNKNOWN (2/2) [2023-08-04 08:17:18,680 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 08:17:18,680 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 08:17:18,735 INFO L144 ThreadInstanceAdder]: Constructed 18 joinOtherThreadTransitions. [2023-08-04 08:17:18,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 456 places, 510 transitions, 1110 flow [2023-08-04 08:17:19,589 INFO L124 PetriNetUnfolderBase]: 976/5105 cut-off events. [2023-08-04 08:17:19,589 INFO L125 PetriNetUnfolderBase]: For 602/602 co-relation queries the response was YES. [2023-08-04 08:17:19,696 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5779 conditions, 5105 events. 976/5105 cut-off events. For 602/602 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 44141 event pairs, 22 based on Foata normal form. 0/4373 useless extension candidates. Maximal degree in co-relation 3113. Up to 192 conditions per place. [2023-08-04 08:17:19,697 INFO L82 GeneralOperation]: Start removeDead. Operand has 456 places, 510 transitions, 1110 flow [2023-08-04 08:17:19,736 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 456 places, 510 transitions, 1110 flow [2023-08-04 08:17:19,736 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 08:17:19,737 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 456 places, 510 transitions, 1110 flow [2023-08-04 08:17:19,737 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 456 places, 510 transitions, 1110 flow [2023-08-04 08:17:19,737 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 456 places, 510 transitions, 1110 flow [2023-08-04 08:17:20,570 INFO L124 PetriNetUnfolderBase]: 976/5105 cut-off events. [2023-08-04 08:17:20,571 INFO L125 PetriNetUnfolderBase]: For 602/602 co-relation queries the response was YES. [2023-08-04 08:17:20,690 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5779 conditions, 5105 events. 976/5105 cut-off events. For 602/602 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 44141 event pairs, 22 based on Foata normal form. 0/4373 useless extension candidates. Maximal degree in co-relation 3113. Up to 192 conditions per place. [2023-08-04 08:17:20,937 INFO L119 LiptonReduction]: Number of co-enabled transitions 104280 [2023-08-04 08:17:29,853 INFO L134 LiptonReduction]: Checked pairs total: 180558 [2023-08-04 08:17:29,853 INFO L136 LiptonReduction]: Total number of compositions: 522 [2023-08-04 08:17:29,854 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 08:17:29,855 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;@4772713e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 08:17:29,855 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 08:17:29,859 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 08:17:29,859 INFO L124 PetriNetUnfolderBase]: 5/38 cut-off events. [2023-08-04 08:17:29,859 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-04 08:17:29,859 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:17:29,859 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:17:29,860 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:17:29,860 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:17:29,860 INFO L85 PathProgramCache]: Analyzing trace with hash -1618205679, now seen corresponding path program 1 times [2023-08-04 08:17:29,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:17:29,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457839648] [2023-08-04 08:17:29,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:17:29,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:17:29,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:17:29,898 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 08:17:29,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:17:29,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457839648] [2023-08-04 08:17:29,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457839648] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:17:29,898 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 08:17:29,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 08:17:29,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081845375] [2023-08-04 08:17:29,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:17:29,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:17:29,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:17:29,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:17:29,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 08:17:29,907 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 447 out of 1032 [2023-08-04 08:17:29,909 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 107 transitions, 304 flow. Second operand has 3 states, 3 states have (on average 450.3333333333333) internal successors, (1351), 3 states have internal predecessors, (1351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:17:29,909 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:17:29,909 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 447 of 1032 [2023-08-04 08:17:29,909 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand